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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:17:53 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:17:53 -0500
commit37e3f157c7d76f13de807fa66e36df209e1005fb (patch)
tree7a4f131b2ee065337dac341bff34515310efba4f /experimental/tqtinterface/qt4/src/kernel/tqevent.cpp
parent16630c3eff313238fa8412275555285c9195981b (diff)
downloadtde-37e3f157c7d76f13de807fa66e36df209e1005fb.tar.gz
tde-37e3f157c7d76f13de807fa66e36df209e1005fb.zip
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+/****************************************************************************
+**
+** Implementation of event classes
+**
+** Created : 931029
+**
+** Copyright (C) 2010 Timothy Pearson and (C) 1992-2008 Trolltech ASA.
+**
+** This file is part of the kernel module of the TQt GUI Toolkit.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free TQt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing requirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** This file may be used under the terms of the Q Public License as
+** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
+** included in the packaging of this file. Licensees holding valid TQt
+** Commercial licenses may use this file in accordance with the TQt
+** Commercial License Agreement provided with the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include <tqtglobaldefines.h>
+#ifdef USE_QT4
+// Nasty, nasty horrid HACK to get access to QFont's private members
+// This is TERRIBLE and I wish there was a way around it
+// See also QRect
+#define private protected
+#include <Qt/qevent.h>
+#undef private
+#endif // USE_QT4
+
+#include "tqevent.h"
+#include "tqcursor.h"
+#include "tqapplication.h"
+
+#ifdef USE_QT4
+
+// TQFocusEvent::Reason TQFocusEvent::prev_reason = TQFocusEvent::Other;
+
+/*!
+ Sets the reason for all future focus events to \a reason.
+
+ \sa reason(), resetReason()
+ */
+void TQFocusEvent::setReason( Qt::FocusReason reason )
+{
+ prev_reason = m_reason;
+ m_reason = reason;
+}
+
+/*!
+ Resets the reason for all future focus events to the value before
+ the last setReason() call.
+
+ \sa reason(), setReason()
+ */
+void TQFocusEvent::resetReason()
+{
+ m_reason = prev_reason;
+}
+
+TQt::ButtonState TQContextMenuEvent::state() const {
+ return TQt::ButtonState(int(QApplication::keyboardModifiers())|QApplication::mouseButtons());
+}
+
+/*!
+ \class TQCustomEvent tqevent.h
+ \brief The TQCustomEvent class provides support for custom events.
+
+ \ingroup events
+
+ TQCustomEvent is a generic event class for user-defined events.
+ User defined events can be sent to widgets or other TQObject
+ instances using TQApplication::postEvent() or
+ TQApplication::sendEvent(). Subclasses of TQObject can easily
+ receive custom events by implementing the TQObject::customEvent()
+ event handler function.
+
+ TQCustomEvent objects should be created with a type ID that
+ uniquely identifies the event type. To avoid clashes with the
+ TQt-defined events types, the value should be at least as large as
+ the value of the "User" entry in the TQEvent::Type enum.
+
+ TQCustomEvent tqcontains a generic void* data member that may be used
+ for transferring event-specific data to the receiver. Note that
+ since events are normally delivered asynchronously, the data
+ pointer, if used, must remain valid until the event has been
+ received and processed.
+
+ TQCustomEvent can be used as-is for simple user-defined event
+ types, but normally you will want to make a subclass of it for
+ your event types. In a subclass, you can add data members that are
+ suitable for your event type.
+
+ Example:
+ \code
+ class ColorChangeEvent : public TQCustomEvent
+ {
+ public:
+ ColorChangeEvent( TQColor color )
+ : TQCustomEvent( 65432 ), c( color ) {}
+ TQColor color() const { return c; }
+ private:
+ TQColor c;
+ };
+
+ // To send an event of this custom event type:
+
+ ColorChangeEvent* ce = new ColorChangeEvent( blue );
+ TQApplication::postEvent( receiver, ce ); // TQt will delete it when done
+
+ // To receive an event of this custom event type:
+
+ void MyWidget::customEvent( TQCustomEvent * e )
+ {
+ if ( e->type() == 65432 ) { // It must be a ColorChangeEvent
+ ColorChangeEvent* ce = (ColorChangeEvent*)e;
+ newColor = ce->color();
+ }
+ }
+ \endcode
+
+ \sa TQWidget::customEvent(), TQApplication::notify()
+*/
+
+
+/*!
+ Constructs a custom event object with event type \a type. The
+ value of \a type must be at least as large as TQEvent::User. The
+ data pointer is set to 0.
+*/
+
+TQCustomEvent::TQCustomEvent( int type )
+ : TQEvent( (TQEvent::Type)type ), d( 0 )
+{
+}
+
+
+/*!
+ \fn TQCustomEvent::TQCustomEvent( Type type, void *data )
+
+ Constructs a custom event object with the event type \a type and a
+ pointer to \a data. (Note that any int value may safely be cast to
+ TQEvent::Type).
+*/
+
+
+/*!
+ \fn void TQCustomEvent::setData( void* data )
+
+ Sets the generic data pointer to \a data.
+
+ \sa data()
+*/
+
+/*!
+ \fn void *TQCustomEvent::data() const
+
+ Returns a pointer to the generic event data.
+
+ \sa setData()
+*/
+
+#else // USE_QT4
+
+/*!
+ \class TQEvent tqevent.h
+ \brief The TQEvent class is the base class of all
+ event classes. Event objects contain event parameters.
+
+ \ingroup events
+ \ingroup environment
+
+ TQt's main event loop (TQApplication::exec()) fetches native window
+ system events from the event queue, translates them into TQEvents
+ and sends the translated events to TQObjects.
+
+ In general, events come from the underlying window system
+ (spontaneous() returns TRUE) but it is also possible to manually
+ send events using TQApplication::sendEvent() and
+ TQApplication::postEvent() (spontaneous() returns FALSE).
+
+ TQObjects receive events by having their TQObject::event() function
+ called. The function can be reimplemented in subclasses to
+ customize event handling and add additional event types;
+ TQWidget::event() is a notable example. By default, events are
+ dispatched to event handlers like TQObject::timerEvent() and
+ TQWidget::mouseMoveEvent(). TQObject::installEventFilter() allows an
+ object to intercept events destined for another object.
+
+ The basic TQEvent tqcontains only an event type parameter.
+ Subclasses of TQEvent contain additional parameters that describe
+ the particular event.
+
+ \sa TQObject::event() TQObject::installEventFilter()
+ TQWidget::event() TQApplication::sendEvent()
+ TQApplication::postEvent() TQApplication::processEvents()
+*/
+
+
+/*!
+ \enum TQt::ButtonState
+
+ This enum type describes the state of the mouse and the modifier
+ buttons.
+
+ \value NoButton used when the button state does not refer to any
+ button (see TQMouseEvent::button()).
+ \value LeftButton set if the left button is pressed, or if this
+ event refers to the left button. (The left button may be
+ the right button on left-handed mice.)
+ \value RightButton the right button.
+ \value MidButton the middle button.
+ \value ShiftButton a Shift key on the keyboard is also pressed.
+ \value ControlButton a Ctrl key on the keyboard is also pressed.
+ \value AltButton an Alt key on the keyboard is also pressed.
+ \value MetaButton a Meta key on the keyboard is also pressed.
+ \value Keypad a keypad button is pressed.
+ \value KeyButtonMask a tqmask for ShiftButton, ControlButton,
+ AltButton and MetaButton.
+ \value MouseButtonMask a tqmask for LeftButton, RightButton and MidButton.
+*/
+
+/*!
+ \enum TQEvent::Type
+
+ This enum type defines the valid event types in TQt. The event
+ types and the specialized classes for each type are these:
+
+ \value None Not an event.
+ \value Accessibility Accessibility information is requested
+ \value Timer Regular timer events, \l{TQTimerEvent}.
+ \value MouseButtonPress Mouse press, \l{TQMouseEvent}.
+ \value MouseButtonRelease Mouse release, \l{TQMouseEvent}.
+ \value MouseButtonDblClick Mouse press again, \l{TQMouseEvent}.
+ \value MouseMove Mouse move, \l{TQMouseEvent}.
+ \value KeyPress Key press (including Shift, for example), \l{TQKeyEvent}.
+ \value KeyRelease Key release, \l{TQKeyEvent}.
+ \value IMStart The start of input method composition, \l{TQIMEvent}.
+ \value IMCompose Input method composition is taking place, \l{TQIMEvent}.
+ \value IMEnd The end of input method composition, \l{TQIMEvent}.
+ \value FocusIn Widget gains keyboard focus, \l{TQFocusEvent}.
+ \value FocusOut Widget loses keyboard focus, \l{TQFocusEvent}.
+ \value Enter Mouse enters widget's boundaries.
+ \value Leave Mouse leaves widget's boundaries.
+ \value Paint Screen update necessary, \l{TQPaintEvent}.
+ \value Move Widget's position changed, \l{TQMoveEvent}.
+ \value Resize Widget's size changed, \l{TQResizeEvent}.
+ \value Show Widget was shown on screen, \l{TQShowEvent}.
+ \value Hide Widget was hidden, \l{TQHideEvent}.
+ \value ShowToParent A child widget has been shown.
+ \value HideToParent A child widget has been hidden.
+ \value Close Widget was closed (permanently), \l{TQCloseEvent}.
+ \value ShowNormal Widget should be shown normally (obsolete).
+ \value ShowMaximized Widget should be shown maximized (obsolete).
+ \value ShowMinimized Widget should be shown minimized (obsolete).
+ \value ShowFullScreen Widget should be shown full-screen (obsolete).
+ \value ShowWindowRequest Widget's window should be shown (obsolete).
+ \value DeferredDelete The object will be deleted after it has
+ cleaned up.
+ \value Accel Key press in child for shortcut key handling, \l{TQKeyEvent}.
+ \value Wheel Mouse wheel rolled, \l{TQWheelEvent}.
+ \value ContextMenu Context popup menu, \l{TQContextMenuEvent}
+ \value AccelOverride Key press in child, for overriding shortcut key handling, \l{TQKeyEvent}.
+ \value AccelAvailable internal.
+ \value WindowActivate Window was activated.
+ \value WindowDeactivate Window was deactivated.
+ \value CaptionChange Widget's caption changed.
+ \value IconChange Widget's icon changed.
+ \value ParentFontChange Font of the tqparent widget changed.
+ \value ApplicationFontChange Default application font changed.
+ \value PaletteChange Palette of the widget changed.
+ \value ParentPaletteChange Palette of the tqparent widget changed.
+ \value ApplicationPaletteChange Default application palette changed.
+ \value Clipboard Clipboard contents have changed.
+ \value SockAct Socket activated, used to implement \l{TQSocketNotifier}.
+ \value DragEnter A drag-and-drop enters widget, \l{TQDragEnterEvent}.
+ \value DragMove A drag-and-drop is in progress, \l{TQDragMoveEvent}.
+ \value DragLeave A drag-and-drop leaves widget, \l{TQDragLeaveEvent}.
+ \value Drop A drag-and-drop is completed, \l{TQDropEvent}.
+ \value DragResponse Internal event used by TQt on some platforms.
+ \value ChildInserted Object gets a child, \l{TQChildEvent}.
+ \value ChildRemoved Object loses a child, \l{TQChildEvent}.
+ \value LayoutHint Widget child has changed tqlayout properties.
+ \value ActivateControl Internal event used by TQt on some platforms.
+ \value DeactivateControl Internal event used by TQt on some platforms.
+ \value LanguageChange The application translation changed, \l{TQTranslator}
+ \value LayoutDirectionChange The direction of layouts changed
+ \value LocaleChange The system locale changed
+ \value Quit Reserved.
+ \value Create Reserved.
+ \value Destroy Reserved.
+ \value Retqparent Reserved.
+ \value Speech Reserved for speech input.
+ \value TabletMove A Wacom Tablet Move Event.
+ \value Style Internal use only
+ \value TabletPress A Wacom Tablet Press Event
+ \value TabletRelease A Wacom Tablet Release Event
+ \value OkRequest Internal event used by TQt on some platforms.
+ \value HelpRequest Internal event used by TQt on some platforms.
+ \value IconDrag Internal event used by TQt on some platforms when proxy icon is dragged.
+ \value WindowStateChange The window's state, i.e. minimized,
+ maximized or full-screen, has changed. See \l{TQWidget::windowState()}.
+ \value WindowBlocked The window is modally blocked
+ \value WindowUnblocked The window leaves modal blocking
+
+ \value User User defined event.
+ \value MaxUser Last user event id.
+
+ User events should have values between User and MaxUser inclusive.
+*/
+/*!
+ \fn TQEvent::TQEvent( Type type )
+
+ Contructs an event object of type \a type.
+*/
+
+/*!
+ \fn TQEvent::Type TQEvent::type() const
+
+ Returns the event type.
+*/
+
+/*!
+ \fn bool TQEvent::spontaneous() const
+
+ Returns TRUE if the event originated outside the application, i.e.
+ it is a system event; otherwise returns FALSE.
+*/
+
+
+/*!
+ \class TQTimerEvent tqevent.h
+ \brief The TQTimerEvent class tqcontains parameters that describe a
+ timer event.
+
+ \ingroup events
+
+ Timer events are sent at regular intervals to objects that have
+ started one or more timers. Each timer has a unique identifier. A
+ timer is started with TQObject::startTimer().
+
+ The TQTimer class provides a high-level programming interface that
+ uses Q_SIGNALS instead of events. It also provides one-shot timers.
+
+ The event handler TQObject::timerEvent() receives timer events.
+
+ \sa TQTimer, TQObject::timerEvent(), TQObject::startTimer(),
+ TQObject::killTimer(), TQObject::killTimers()
+*/
+
+/*!
+ \fn TQTimerEvent::TQTimerEvent( int timerId )
+
+ Constructs a timer event object with the timer identifier set to
+ \a timerId.
+*/
+
+/*!
+ \fn int TQTimerEvent::timerId() const
+
+ Returns the unique timer identifier, which is the same identifier
+ as returned from TQObject::startTimer().
+*/
+
+
+/*!
+ \class TQMouseEvent tqevent.h
+ \ingroup events
+
+ \brief The TQMouseEvent class tqcontains parameters that describe a mouse event.
+
+ Mouse events occur when a mouse button is pressed or released
+ inside a widget or when the mouse cursor is moved.
+
+ Mouse move events will occur only when a mouse button is pressed
+ down, unless mouse tracking has been enabled with
+ TQWidget::setMouseTracking().
+
+ TQt automatically grabs the mouse when a mouse button is pressed
+ inside a widget; the widget will continue to receive mouse events
+ until the last mouse button is released.
+
+ A mouse event tqcontains a special accept flag that indicates
+ whether the receiver wants the event. You should call
+ TQMouseEvent::ignore() if the mouse event is not handled by your
+ widget. A mouse event is propagated up the tqparent widget chain
+ until a widget accepts it with TQMouseEvent::accept() or an event
+ filter consumes it.
+
+ The functions pos(), x() and y() give the cursor position relative
+ to the widget that receives the mouse event. If you move the
+ widget as a result of the mouse event, use the global position
+ returned by globalPos() to avoid a shaking motion.
+
+ The TQWidget::setEnabled() function can be used to enable or
+ disable mouse and keyboard events for a widget.
+
+ The event handlers TQWidget::mousePressEvent(),
+ TQWidget::mouseReleaseEvent(), TQWidget::mouseDoubleClickEvent() and
+ TQWidget::mouseMoveEvent() receive mouse events.
+
+ \sa TQWidget::setMouseTracking(), TQWidget::grabMouse(),
+ TQCursor::pos()
+*/
+
+/*!
+ \fn TQMouseEvent::TQMouseEvent( Type type, const TQPoint &pos, int button, int state )
+
+ Constructs a mouse event object.
+
+ The \a type parameter must be one of \c TQEvent::MouseButtonPress,
+ \c TQEvent::MouseButtonRelease, \c TQEvent::MouseButtonDblClick or
+ \c TQEvent::MouseMove.
+
+ The \a pos parameter specifies the position relative to the
+ receiving widget. \a button specifies the \link TQt::ButtonState
+ button\endlink that caused the event, which should be \c
+ TQt::NoButton (0), if \a type is \c MouseMove. \a state is the
+ \link TQt::ButtonState ButtonState\endlink at the time of the
+ event.
+
+ The globalPos() is initialized to TQCursor::pos(), which may not be
+ appropriate. Use the other constructor to specify the global
+ position explicitly.
+*/
+
+TQMouseEvent::TQMouseEvent( Type type, const TQPoint &pos, int button, int state )
+ : TQEvent(type), p(pos), b(button),s((ushort)state), accpt(TRUE){
+ g = TQCursor::pos();
+}
+
+
+/*!
+ \fn TQMouseEvent::TQMouseEvent( Type type, const TQPoint &pos, const TQPoint &globalPos, int button, int state )
+
+ Constructs a mouse event object.
+
+ The \a type parameter must be \c TQEvent::MouseButtonPress, \c
+ TQEvent::MouseButtonRelease, \c TQEvent::MouseButtonDblClick or \c
+ TQEvent::MouseMove.
+
+ The \a pos parameter specifies the position relative to the
+ receiving widget. \a globalPos is the position in absolute
+ coordinates. \a button specifies the \link TQt::ButtonState
+ button\endlink that caused the event, which should be \c
+ TQt::NoButton (0), if \a type is \c MouseMove. \a state is the
+ \link TQt::ButtonState ButtonState\endlink at the time of the
+ event.
+
+*/
+
+/*!
+ \fn const TQPoint &TQMouseEvent::pos() const
+
+ Returns the position of the mouse pointer relative to the widget
+ that received the event.
+
+ If you move the widget as a result of the mouse event, use the
+ global position returned by globalPos() to avoid a shaking motion.
+
+ \sa x(), y(), globalPos()
+*/
+
+/*!
+ \fn const TQPoint &TQMouseEvent::globalPos() const
+
+ Returns the global position of the mouse pointer \e{at the time
+ of the event}. This is important on asynchronous window systems
+ like X11. Whenever you move your widgets around in response to
+ mouse events, globalPos() may differ a lot from the current
+ pointer position TQCursor::pos(), and from TQWidget::mapToGlobal(
+ pos() ).
+
+ \sa globalX(), globalY()
+*/
+
+/*!
+ \fn int TQMouseEvent::x() const
+
+ Returns the x-position of the mouse pointer, relative to the
+ widget that received the event.
+
+ \sa y(), pos()
+*/
+
+/*!
+ \fn int TQMouseEvent::y() const
+
+ Returns the y-position of the mouse pointer, relative to the
+ widget that received the event.
+
+ \sa x(), pos()
+*/
+
+/*!
+ \fn int TQMouseEvent::globalX() const
+
+ Returns the global x-position of the mouse pointer at the time of
+ the event.
+
+ \sa globalY(), globalPos()
+*/
+
+/*!
+ \fn int TQMouseEvent::globalY() const
+
+ Returns the global y-position of the mouse pointer at the time of
+ the event.
+
+ \sa globalX(), globalPos()
+*/
+
+/*!
+ \fn ButtonState TQMouseEvent::button() const
+
+ Returns the button that caused the event.
+
+ Possible return values are \c LeftButton, \c RightButton, \c
+ MidButton and \c NoButton.
+
+ Note that the returned value is always \c NoButton for mouse move
+ events.
+
+ \sa state() TQt::ButtonState
+*/
+
+
+/*!
+ \fn ButtonState TQMouseEvent::state() const
+
+ Returns the button state (a combination of mouse buttons and
+ keyboard modifiers), i.e. what buttons and keys were being pressed
+ immediately before the event was generated.
+
+ This means that if you have a \c TQEvent::MouseButtonPress or a \c
+ TQEvent::MouseButtonDblClick state() will \e not include the mouse
+ button that's pressed. But once the mouse button has been
+ released, the \c TQEvent::MouseButtonRelease event will have the
+ button() that was pressed.
+
+ This value is mainly interesting for \c TQEvent::MouseMove; for the
+ other cases, button() is more useful.
+
+ The returned value is \c LeftButton, \c RightButton, \c MidButton,
+ \c ShiftButton, \c ControlButton and \c AltButton OR'ed together.
+
+ \sa button() stateAfter() TQt::ButtonState
+*/
+
+/*!
+ \fn ButtonState TQMouseEvent::stateAfter() const
+
+ Returns the state of buttons after the event.
+
+ \sa state() TQt::ButtonState
+*/
+TQt::ButtonState TQMouseEvent::stateAfter() const
+{
+ return TQt::ButtonState(state()^button());
+}
+
+
+
+/*!
+ \fn bool TQMouseEvent::isAccepted() const
+
+ Returns TRUE if the receiver of the event wants to keep the key;
+ otherwise returns FALSE.
+*/
+
+/*!
+ \fn void TQMouseEvent::accept()
+
+ Sets the accept flag of the mouse event object.
+
+ Setting the accept parameter indicates that the receiver of the
+ event wants the mouse event. Unwanted mouse events are sent to the
+ tqparent widget.
+
+ The accept flag is set by default.
+
+ \sa ignore()
+*/
+
+
+/*!
+ \fn void TQMouseEvent::ignore()
+
+ Clears the accept flag parameter of the mouse event object.
+
+ Clearing the accept parameter indicates that the event receiver
+ does not want the mouse event. Unwanted mouse events are sent to
+ the tqparent widget.
+
+ The accept flag is set by default.
+
+ \sa accept()
+*/
+
+
+/*!
+ \class TQWheelEvent tqevent.h
+ \brief The TQWheelEvent class tqcontains parameters that describe a wheel event.
+
+ \ingroup events
+
+ Wheel events are sent to the widget under the mouse, and if that widget
+ does not handle the event they are sent to the focus widget. The rotation
+ distance is provided by delta(). The functions pos() and globalPos() return
+ the mouse pointer location at the time of the event.
+
+ A wheel event tqcontains a special accept flag that indicates
+ whether the receiver wants the event. You should call
+ TQWheelEvent::accept() if you handle the wheel event; otherwise it
+ will be sent to the tqparent widget.
+
+ The TQWidget::setEnable() function can be used to enable or disable
+ mouse and keyboard events for a widget.
+
+ The event handler TQWidget::wheelEvent() receives wheel events.
+
+ \sa TQMouseEvent, TQWidget::grabMouse()
+*/
+
+/*!
+ \fn Orientation TQWheelEvent::orientation() const
+
+ Returns the wheel's orientation.
+*/
+
+/*!
+ \fn TQWheelEvent::TQWheelEvent( const TQPoint &pos, int delta, int state, Orientation orient = Vertical );
+
+ Constructs a wheel event object.
+
+ The globalPos() is initialized to TQCursor::pos(), i.e. \a pos,
+ which is usually (but not always) right. Use the other constructor
+ if you need to specify the global position explicitly. \a delta
+ tqcontains the rotation distance, \a state holds the keyboard
+ modifier flags at the time of the event and \a orient holds the
+ wheel's orientation.
+
+ \sa pos(), delta(), state()
+*/
+#ifndef TQT_NO_WHEELEVENT
+TQWheelEvent::TQWheelEvent( const TQPoint &pos, int delta, int state, Orientation orient )
+ : TQEvent(Wheel), p(pos), d(delta), s((ushort)state),
+ accpt(TRUE), o(orient)
+{
+ g = TQCursor::pos();
+}
+#endif
+/*!
+ \fn TQWheelEvent::TQWheelEvent( const TQPoint &pos, const TQPoint& globalPos, int delta, int state, Orientation orient = Vertical )
+
+ Constructs a wheel event object. The position when the event
+ occurred is given in \a pos and \a globalPos. \a delta tqcontains
+ the rotation distance, \a state holds the keyboard modifier flags
+ at the time of the event and \a orient holds the wheel's
+ orientation.
+
+ \sa pos(), globalPos(), delta(), state()
+*/
+
+/*!
+ \fn int TQWheelEvent::delta() const
+
+ Returns the distance that the wheel is rotated expressed in
+ multiples or divisions of the \e{wheel delta}, which is currently
+ defined to be 120. A positive value indicates that the wheel was
+ rotated forwards away from the user; a negative value indicates
+ that the wheel was rotated backwards toward the user.
+
+ The \e{wheel delta} constant was defined to be 120 by wheel mouse
+ vendors to allow building finer-resolution wheels in the future,
+ including perhaps a freely rotating wheel with no notches. The
+ expectation is that such a tqdevice would send more messages per
+ rotation but with a smaller value in each message.
+*/
+
+/*!
+ \fn const TQPoint &TQWheelEvent::pos() const
+
+ Returns the position of the mouse pointer, relative to the widget
+ that received the event.
+
+ If you move your widgets around in response to mouse
+ events, use globalPos() instead of this function.
+
+ \sa x(), y(), globalPos()
+*/
+
+/*!
+ \fn int TQWheelEvent::x() const
+
+ Returns the x-position of the mouse pointer, relative to the
+ widget that received the event.
+
+ \sa y(), pos()
+*/
+
+/*!
+ \fn int TQWheelEvent::y() const
+
+ Returns the y-position of the mouse pointer, relative to the
+ widget that received the event.
+
+ \sa x(), pos()
+*/
+
+
+/*!
+ \fn const TQPoint &TQWheelEvent::globalPos() const
+
+ Returns the global position of the mouse pointer \e{at the time
+ of the event}. This is important on asynchronous window systems
+ such as X11; whenever you move your widgets around in response to
+ mouse events, globalPos() can differ a lot from the current
+ pointer position TQCursor::pos().
+
+ \sa globalX(), globalY()
+*/
+
+/*!
+ \fn int TQWheelEvent::globalX() const
+
+ Returns the global x-position of the mouse pointer at the time of
+ the event.
+
+ \sa globalY(), globalPos()
+*/
+
+/*!
+ \fn int TQWheelEvent::globalY() const
+
+ Returns the global y-position of the mouse pointer at the time of
+ the event.
+
+ \sa globalX(), globalPos()
+*/
+
+
+/*!
+ \fn ButtonState TQWheelEvent::state() const
+
+ Returns the keyboard modifier flags of the event.
+
+ The returned value is \c ShiftButton, \c ControlButton, and \c
+ AltButton OR'ed together.
+*/
+
+/*!
+ \fn bool TQWheelEvent::isAccepted() const
+
+ Returns TRUE if the receiver of the event handles the wheel event;
+ otherwise returns FALSE.
+*/
+
+/*!
+ \fn void TQWheelEvent::accept()
+
+ Sets the accept flag of the wheel event object.
+
+ Setting the accept parameter indicates that the receiver of the
+ event wants the wheel event. Unwanted wheel events are sent to the
+ tqparent widget.
+
+ The accept flag is set by default.
+
+ \sa ignore()
+*/
+
+/*!
+ \fn void TQWheelEvent::ignore()
+
+ Clears the accept flag parameter of the wheel event object.
+
+ Clearing the accept parameter indicates that the event receiver
+ does not want the wheel event. Unwanted wheel events are sent to
+ the tqparent widget. The accept flag is set by default.
+
+ \sa accept()
+*/
+
+
+/*!
+ \enum TQt::Modifier
+
+ This enum type describes the keyboard modifier keys supported by
+ TQt.
+
+ \value SHIFT the Shift keys provided on all standard keyboards.
+ \value META the Meta keys.
+ \value CTRL the Ctrl keys.
+ \value ALT the normal Alt keys, but not e.g. AltGr.
+ \value MODIFIER_MASK is a tqmask of Shift, Ctrl, Alt and Meta.
+ \value UNICODE_ACCEL the accelerator is specified as a Unicode code
+ point, not as a TQt Key.
+*/
+
+/*!
+ \class TQKeyEvent tqevent.h
+ \brief The TQKeyEvent class tqcontains describes a key event.
+
+ \ingroup events
+
+ Key events occur when a key is pressed or released when a widget
+ has keyboard input focus.
+
+ A key event tqcontains a special accept flag that indicates whether the
+ receiver wants the key event. You should call TQKeyEvent::ignore() if the
+ key press or release event is not handled by your widget. A key event is
+ propagated up the tqparent widget chain until a widget accepts it with
+ TQKeyEvent::accept() or an event filter consumes it.
+ Key events for multi media keys are ignored by default. You should call
+ TQKeyEvent::accept() if your widget handles those events.
+
+ The TQWidget::setEnable() function can be used to enable or disable
+ mouse and keyboard events for a widget.
+
+ The event handlers TQWidget::keyPressEvent() and
+ TQWidget::keyReleaseEvent() receive key events.
+
+ \sa TQFocusEvent, TQWidget::grabKeyboard()
+*/
+
+/*!
+ \fn TQKeyEvent::TQKeyEvent( Type type, int key, int ascii, int state,
+ const TQString& text, bool autorep, ushort count )
+
+ Constructs a key event object.
+
+ The \a type parameter must be \c TQEvent::KeyPress or \c
+ TQEvent::KeyRelease. If \a key is 0 the event is not a result of a
+ known key (e.g. it may be the result of a compose sequence or
+ keyboard macro). \a ascii is the ASCII code of the key that was
+ pressed or released. \a state holds the keyboard modifiers. \a
+ text is the Unicode text that the key generated. If \a autorep is
+ TRUE, isAutoRepeat() will be TRUE. \a count is the number of
+ single keys.
+
+ The accept flag is set to TRUE.
+*/
+
+/*!
+ \fn int TQKeyEvent::key() const
+
+ Returns the code of the key that was pressed or released.
+
+ See \l TQt::Key for the list of keyboard codes. These codes are
+ independent of the underlying window system.
+
+ A value of either 0 or Key_unknown means that the event is not
+ the result of a known key (e.g. it may be the result of a compose
+ sequence or a keyboard macro, or due to key event compression).
+
+ \sa TQWidget::setKeyCompression()
+*/
+
+/*!
+ \fn int TQKeyEvent::ascii() const
+
+ Returns the ASCII code of the key that was pressed or released. We
+ recommend using text() instead.
+
+ \sa text()
+*/
+
+/*!
+ \fn TQString TQKeyEvent::text() const
+
+ Returns the Unicode text that this key generated. The text returned
+ migth be empty, which is the case when pressing or
+ releasing modifying keys as Shift, Control, Alt and Meta. In these
+ cases key() will contain a valid value.
+
+ \sa TQWidget::setKeyCompression()
+*/
+
+/*!
+ \fn ButtonState TQKeyEvent::state() const
+
+ Returns the keyboard modifier flags that existed immediately
+ before the event occurred.
+
+ The returned value is \c ShiftButton, \c ControlButton, \c AltButton
+ and \c MetaButton OR'ed together.
+
+ \sa stateAfter()
+*/
+
+/*!
+ \fn ButtonState TQKeyEvent::stateAfter() const
+
+ Returns the keyboard modifier flags that existed immediately after
+ the event occurred.
+
+ \warning This function cannot be trusted.
+
+ \sa state()
+*/
+//###### We must check with XGetModifierMapping
+TQt::ButtonState TQKeyEvent::stateAfter() const
+{
+ if ( key() == Key_Shift )
+ return TQt::ButtonState(state()^ShiftButton);
+ if ( key() == Key_Control )
+ return TQt::ButtonState(state()^ControlButton);
+ if ( key() == Key_Alt )
+ return TQt::ButtonState(state()^AltButton);
+ if ( key() == Key_Meta )
+ return TQt::ButtonState(state()^MetaButton);
+ return state();
+}
+
+/*!
+ \fn bool TQKeyEvent::isAccepted() const
+
+ Returns TRUE if the receiver of the event wants to keep the key;
+ otherwise returns FALSE
+*/
+
+/*!
+ \fn void TQKeyEvent::accept()
+
+ Sets the accept flag of the key event object.
+
+ Setting the accept parameter indicates that the receiver of the
+ event wants the key event. Unwanted key events are sent to the
+ tqparent widget.
+
+ The accept flag is set by default.
+
+ \sa ignore()
+*/
+
+/*!
+ \fn bool TQKeyEvent::isAutoRepeat() const
+
+ Returns TRUE if this event comes from an auto-repeating key and
+ FALSE if it comes from an initial key press.
+
+ Note that if the event is a multiple-key compressed event that is
+ partly due to auto-repeat, this function could return either TRUE
+ or FALSE indeterminately.
+*/
+
+/*!
+ \fn int TQKeyEvent::count() const
+
+ Returns the number of single keys for this event. If text() is not
+ empty, this is simply the length of the string.
+
+ \sa TQWidget::setKeyCompression()
+*/
+
+/*!
+ \fn void TQKeyEvent::ignore()
+
+ Clears the accept flag parameter of the key event object.
+
+ Clearing the accept parameter indicates that the event receiver
+ does not want the key event. Unwanted key events are sent to the
+ tqparent widget.
+
+ The accept flag is set by default.
+
+ \sa accept()
+*/
+
+/*!
+ \enum TQt::Key
+
+ The key names used by TQt.
+
+ \value Key_Escape
+ \value Key_Tab
+ \value Key_Backtab
+ \value Key_Backspace
+ \value Key_Return
+ \value Key_Enter
+ \value Key_Insert
+ \value Key_Delete
+ \value Key_Pause
+ \value Key_Print
+ \value Key_SysReq
+ \value Key_Home
+ \value Key_End
+ \value Key_Left
+ \value Key_Up
+ \value Key_Right
+ \value Key_Down
+ \value Key_Prior
+ \value Key_Next
+ \value Key_Shift
+ \value Key_Control
+ \value Key_Meta
+ \value Key_Alt
+ \value Key_CapsLock
+ \value Key_NumLock
+ \value Key_ScrollLock
+ \value Key_Clear
+ \value Key_F1
+ \value Key_F2
+ \value Key_F3
+ \value Key_F4
+ \value Key_F5
+ \value Key_F6
+ \value Key_F7
+ \value Key_F8
+ \value Key_F9
+ \value Key_F10
+ \value Key_F11
+ \value Key_F12
+ \value Key_F13
+ \value Key_F14
+ \value Key_F15
+ \value Key_F16
+ \value Key_F17
+ \value Key_F18
+ \value Key_F19
+ \value Key_F20
+ \value Key_F21
+ \value Key_F22
+ \value Key_F23
+ \value Key_F24
+ \value Key_F25
+ \value Key_F26
+ \value Key_F27
+ \value Key_F28
+ \value Key_F29
+ \value Key_F30
+ \value Key_F31
+ \value Key_F32
+ \value Key_F33
+ \value Key_F34
+ \value Key_F35
+ \value Key_Super_L
+ \value Key_Super_R
+ \value Key_Menu
+ \value Key_Hyper_L
+ \value Key_Hyper_R
+ \value Key_Help
+ \value Key_Space
+ \value Key_Any
+ \value Key_Exclam
+ \value Key_QuoteDbl
+ \value Key_NumberSign
+ \value Key_Dollar
+ \value Key_Percent
+ \value Key_Ampersand
+ \value Key_Apostrophe
+ \value Key_ParenLeft
+ \value Key_ParenRight
+ \value Key_Asterisk
+ \value Key_Plus
+ \value Key_Comma
+ \value Key_Minus
+ \value Key_Period
+ \value Key_Slash
+ \value Key_0
+ \value Key_1
+ \value Key_2
+ \value Key_3
+ \value Key_4
+ \value Key_5
+ \value Key_6
+ \value Key_7
+ \value Key_8
+ \value Key_9
+ \value Key_Colon
+ \value Key_Semicolon
+ \value Key_Less
+ \value Key_Equal
+ \value Key_Greater
+ \value Key_Question
+ \value Key_At
+ \value Key_A
+ \value Key_B
+ \value Key_C
+ \value Key_D
+ \value Key_E
+ \value Key_F
+ \value Key_G
+ \value Key_H
+ \value Key_I
+ \value Key_J
+ \value Key_K
+ \value Key_L
+ \value Key_M
+ \value Key_N
+ \value Key_O
+ \value Key_P
+ \value Key_Q
+ \value Key_R
+ \value Key_S
+ \value Key_T
+ \value Key_U
+ \value Key_V
+ \value Key_W
+ \value Key_X
+ \value Key_Y
+ \value Key_Z
+ \value Key_BracketLeft
+ \value Key_Backslash
+ \value Key_BracketRight
+ \value Key_AsciiCircum
+ \value Key_Underscore
+ \value Key_QuoteLeft
+ \value Key_BraceLeft
+ \value Key_Bar
+ \value Key_BraceRight
+ \value Key_AsciiTilde
+
+ \value Key_nobreakspace
+ \value Key_exclamdown
+ \value Key_cent
+ \value Key_sterling
+ \value Key_currency
+ \value Key_yen
+ \value Key_brokenbar
+ \value Key_section
+ \value Key_diaeresis
+ \value Key_copyright
+ \value Key_ordfeminine
+ \value Key_guillemotleft
+ \value Key_notsign
+ \value Key_hyphen
+ \value Key_registered
+ \value Key_macron
+ \value Key_degree
+ \value Key_plusminus
+ \value Key_twosuperior
+ \value Key_threesuperior
+ \value Key_acute
+ \value Key_mu
+ \value Key_paragraph
+ \value Key_periodcentered
+ \value Key_cedilla
+ \value Key_onesuperior
+ \value Key_masculine
+ \value Key_guillemotright
+ \value Key_onequarter
+ \value Key_onehalf
+ \value Key_threequarters
+ \value Key_questiondown
+ \value Key_Agrave
+ \value Key_Aacute
+ \value Key_Acircumflex
+ \value Key_Atilde
+ \value Key_Adiaeresis
+ \value Key_Aring
+ \value Key_AE
+ \value Key_Ccedilla
+ \value Key_Egrave
+ \value Key_Eacute
+ \value Key_Ecircumflex
+ \value Key_Ediaeresis
+ \value Key_Igrave
+ \value Key_Iacute
+ \value Key_Icircumflex
+ \value Key_Idiaeresis
+ \value Key_ETH
+ \value Key_Ntilde
+ \value Key_Ograve
+ \value Key_Oacute
+ \value Key_Ocircumflex
+ \value Key_Otilde
+ \value Key_Odiaeresis
+ \value Key_multiply
+ \value Key_Ooblique
+ \value Key_Ugrave
+ \value Key_Uacute
+ \value Key_Ucircumflex
+ \value Key_Udiaeresis
+ \value Key_Yacute
+ \value Key_THORN
+ \value Key_ssharp
+ \value Key_agrave
+ \value Key_aacute
+ \value Key_acircumflex
+ \value Key_atilde
+ \value Key_adiaeresis
+ \value Key_aring
+ \value Key_ae
+ \value Key_ccedilla
+ \value Key_egrave
+ \value Key_eacute
+ \value Key_ecircumflex
+ \value Key_ediaeresis
+ \value Key_igrave
+ \value Key_iacute
+ \value Key_icircumflex
+ \value Key_idiaeresis
+ \value Key_eth
+ \value Key_ntilde
+ \value Key_ograve
+ \value Key_oacute
+ \value Key_ocircumflex
+ \value Key_otilde
+ \value Key_odiaeresis
+ \value Key_division
+ \value Key_oslash
+ \value Key_ugrave
+ \value Key_uacute
+ \value Key_ucircumflex
+ \value Key_udiaeresis
+ \value Key_yacute
+ \value Key_thorn
+ \value Key_ydiaeresis
+
+ Multimedia keys
+
+ \value Key_Back
+ \value Key_Forward
+ \value Key_Stop
+ \value Key_Refresh
+
+ \value Key_VolumeDown
+ \value Key_VolumeMute
+ \value Key_VolumeUp
+ \value Key_BassBoost
+ \value Key_BassUp
+ \value Key_BassDown
+ \value Key_TrebleUp
+ \value Key_TrebleDown
+
+ \value Key_MediaPlay
+ \value Key_MediaStop
+ \value Key_MediaPrev
+ \value Key_MediaNext
+ \value Key_MediaRecord
+
+ \value Key_HomePage
+ \value Key_Favorites
+ \value Key_Search
+ \value Key_Standby
+ \value Key_OpenUrl
+
+ \value Key_LaunchMail
+ \value Key_LaunchMedia
+ \value Key_Launch0
+ \value Key_Launch1
+ \value Key_Launch2
+ \value Key_Launch3
+ \value Key_Launch4
+ \value Key_Launch5
+ \value Key_Launch6
+ \value Key_Launch7
+ \value Key_Launch8
+ \value Key_Launch9
+ \value Key_LaunchA
+ \value Key_LaunchB
+ \value Key_LaunchC
+ \value Key_LaunchD
+ \value Key_LaunchE
+ \value Key_LaunchF
+
+ \value Key_MediaLast
+
+ \value Key_unknown
+
+ \value Key_Direction_L internal use only
+ \value Key_Direction_R internal use only
+
+*/
+
+
+/*!
+ \class TQFocusEvent tqevent.h
+ \brief The TQFocusEvent class tqcontains event parameters for widget focus
+ events.
+
+ \ingroup events
+
+ Focus events are sent to widgets when the keyboard input focus
+ changes. Focus events occur due to mouse actions, keypresses (e.g.
+ Tab or Backtab), the window system, popup menus, keyboard
+ shortcuts or other application specific reasons. The reason for a
+ particular focus event is returned by reason() in the appropriate
+ event handler.
+
+ The event handlers TQWidget::focusInEvent() and
+ TQWidget::focusOutEvent() receive focus events.
+
+ Use setReason() to set the reason for all focus events, and
+ resetReason() to set the reason for all focus events to the reason
+ in force before the last setReason() call.
+
+ \sa TQWidget::setFocus(), TQWidget::setFocusPolicy()
+*/
+
+/*!
+ \fn TQFocusEvent::TQFocusEvent( Type type )
+
+ Constructs a focus event object.
+
+ The \a type parameter must be either \c TQEvent::FocusIn or \c
+ TQEvent::FocusOut.
+*/
+
+
+
+TQFocusEvent::Reason TQFocusEvent::m_reason = TQFocusEvent::Other;
+TQFocusEvent::Reason TQFocusEvent::prev_reason = TQFocusEvent::Other;
+
+
+/*!
+ \enum TQFocusEvent::Reason
+
+ This enum specifies why the focus changed.
+
+ \value Mouse because of a mouse action.
+ \value Tab because of a Tab press.
+ \value Backtab because of a Backtab press
+ (possibly including Shift/Control, e.g. Shift+Tab).
+ \value ActiveWindow because the window system made this window (in)active.
+ \value Popup because the application opened/closed a popup that grabbed/released focus.
+ \value Shortcut because of a keyboard shortcut.
+ \value Other any other reason, usually application-specific.
+
+ See the \link focus.html keyboard focus overview\endlink for more
+ about focus.
+*/
+
+/*!
+ Returns the reason for this focus event.
+
+ \sa setReason()
+ */
+TQFocusEvent::Reason TQFocusEvent::reason()
+{
+ return m_reason;
+}
+
+/*!
+ Sets the reason for all future focus events to \a reason.
+
+ \sa reason(), resetReason()
+ */
+void TQFocusEvent::setReason( Reason reason )
+{
+ prev_reason = m_reason;
+ m_reason = reason;
+}
+
+/*!
+ Resets the reason for all future focus events to the value before
+ the last setReason() call.
+
+ \sa reason(), setReason()
+ */
+void TQFocusEvent::resetReason()
+{
+ m_reason = prev_reason;
+}
+
+/*!
+ \fn bool TQFocusEvent::gotFocus() const
+
+ Returns TRUE if the widget received the text input focus;
+ otherwise returns FALSE.
+*/
+
+/*!
+ \fn bool TQFocusEvent::lostFocus() const
+
+ Returns TRUE if the widget lost the text input focus; otherwise
+ returns FALSE.
+*/
+
+
+/*!
+ \class TQPaintEvent tqevent.h
+ \brief The TQPaintEvent class tqcontains event parameters for paint events.
+
+ \ingroup events
+
+ Paint events are sent to widgets that need to update themselves,
+ for instance when part of a widget is exposed because a covering
+ widget is moved.
+
+ The event tqcontains a region() that needs to be updated, and a
+ rect() that is the bounding rectangle of that region. Both are
+ provided because many widgets can't make much use of region(), and
+ rect() can be much faster than region().boundingRect(). Painting
+ is clipped to region() during processing of a paint event.
+
+ The erased() function returns TRUE if the region() has been
+ cleared to the widget's background (see
+ TQWidget::backgroundMode()), and FALSE if the region's contents are
+ arbitrary.
+
+ \sa TQPainter TQWidget::update() TQWidget::tqrepaint()
+ TQWidget::paintEvent() TQWidget::backgroundMode() TQRegion
+*/
+
+/*!
+ \fn TQPaintEvent::TQPaintEvent( const TQRegion &paintRegion, bool erased=TRUE )
+
+ Constructs a paint event object with the region that should be
+ updated. The region is given by \a paintRegion. If \a erased is
+ TRUE the region will be cleared before repainting.
+*/
+
+/*!
+ \fn TQPaintEvent::TQPaintEvent( const TQRect &paintRect, bool erased=TRUE )
+
+ Constructs a paint event object with the rectangle that should be
+ updated. The region is also given by \a paintRect. If \a erased is
+ TRUE the region will be cleared before repainting.
+*/
+
+/*!
+ \fn TQPaintEvent::TQPaintEvent( const TQRegion &paintRegion, const TQRect &paintRect, bool erased=TRUE )
+
+ Constructs a paint event object with the rectangle \a paintRect
+ that should be updated. The region is given by \a paintRegion. If
+ \a erased is TRUE the region will be cleared before repainting.
+*/
+
+/*!
+ \fn const TQRect &TQPaintEvent::rect() const
+
+ Returns the rectangle that should be updated.
+
+ \sa region(), TQPainter::setClipRect()
+*/
+
+/*!
+ \fn const TQRegion &TQPaintEvent::region() const
+
+ Returns the region that should be updated.
+
+ \sa rect(), TQPainter::setClipRegion()
+*/
+
+/*!
+ \fn bool TQPaintEvent::erased() const
+
+ Returns TRUE if the paint event region (or rectangle) has been
+ erased with the widget's background; otherwise returns FALSE.
+*/
+
+/*!
+ \class TQMoveEvent tqevent.h
+ \brief The TQMoveEvent class tqcontains event parameters for move events.
+
+ \ingroup events
+
+ Move events are sent to widgets that have been moved to a new position
+ relative to their tqparent.
+
+ The event handler TQWidget::moveEvent() receives move events.
+
+ \sa TQWidget::move(), TQWidget::setGeometry()
+*/
+
+/*!
+ \fn TQMoveEvent::TQMoveEvent( const TQPoint &pos, const TQPoint &oldPos )
+
+ Constructs a move event with the new and old widget positions, \a
+ pos and \a oldPos respectively.
+*/
+
+/*!
+ \fn const TQPoint &TQMoveEvent::pos() const
+
+ Returns the new position of the widget. This excludes the window
+ frame for top level widgets.
+*/
+
+/*!
+ \fn const TQPoint &TQMoveEvent::oldPos() const
+
+ Returns the old position of the widget.
+*/
+
+
+/*!
+ \class TQResizeEvent tqevent.h
+ \brief The TQResizeEvent class tqcontains event parameters for resize events.
+
+ \ingroup events
+
+ Resize events are sent to widgets that have been resized.
+
+ The event handler TQWidget::resizeEvent() receives resize events.
+
+ \sa TQWidget::resize(), TQWidget::setGeometry()
+*/
+
+/*!
+ \fn TQResizeEvent::TQResizeEvent( const TQSize &size, const TQSize &oldSize )
+
+ Constructs a resize event with the new and old widget sizes, \a
+ size and \a oldSize respectively.
+*/
+
+/*!
+ \fn const TQSize &TQResizeEvent::size() const
+
+ Returns the new size of the widget, which is the same as
+ TQWidget::size().
+*/
+
+/*!
+ \fn const TQSize &TQResizeEvent::oldSize() const
+
+ Returns the old size of the widget.
+*/
+
+
+/*!
+ \class TQCloseEvent tqevent.h
+ \brief The TQCloseEvent class tqcontains parameters that describe a close event.
+
+ \ingroup events
+
+ Close events are sent to widgets that the user wants to close,
+ usually by choosing "Close" from the window menu, or by clicking
+ the `X' titlebar button. They are also sent when you call
+ TQWidget::close() to close a widget programmatically.
+
+ Close events contain a flag that indicates whether the receiver
+ wants the widget to be closed or not. When a widget accepts the
+ close event, it is hidden (and destroyed if it was created with
+ the \c WDestructiveClose flag). If it refuses to accept the close
+ event nothing happens. (Under X11 it is possible that the window
+ manager will forcibly close the window; but at the time of writing
+ we are not aware of any window manager that does this.)
+
+ The application's main widget -- TQApplication::mainWidget() --
+ is a special case. When it accepts the close event, TQt leaves the
+ main event loop and the application is immediately terminated
+ (i.e. it returns from the call to TQApplication::exec() in the
+ main() function).
+
+ The event handler TQWidget::closeEvent() receives close events. The
+ default implementation of this event handler accepts the close
+ event. If you do not want your widget to be hidden, or want some
+ special handing, you should reimplement the event handler.
+
+ The \link simple-application.html#closeEvent closeEvent() in the
+ Application Walkthrough\endlink shows a close event handler that
+ asks whether to save a document before closing.
+
+ If you want the widget to be deleted when it is closed, create it
+ with the \c WDestructiveClose widget flag. This is very useful for
+ independent top-level windows in a multi-window application.
+
+ \l{TQObject}s emits the \link TQObject::destroyed()
+ destroyed()\endlink signal when they are deleted.
+
+ If the last top-level window is closed, the
+ TQApplication::lastWindowClosed() signal is emitted.
+
+ The isAccepted() function returns TRUE if the event's receiver has
+ agreed to close the widget; call accept() to agree to close the
+ widget and call ignore() if the receiver of this event does not
+ want the widget to be closed.
+
+ \sa TQWidget::close(), TQWidget::hide(), TQObject::destroyed(),
+ TQApplication::setMainWidget(), TQApplication::lastWindowClosed(),
+ TQApplication::exec(), TQApplication::quit()
+*/
+
+/*!
+ \fn TQCloseEvent::TQCloseEvent()
+
+ Constructs a close event object with the accept parameter flag set
+ to FALSE.
+
+ \sa accept()
+*/
+
+/*!
+ \fn bool TQCloseEvent::isAccepted() const
+
+ Returns TRUE if the receiver of the event has agreed to close the
+ widget; otherwise returns FALSE.
+
+ \sa accept(), ignore()
+*/
+
+/*!
+ \fn void TQCloseEvent::accept()
+
+ Sets the accept flag of the close event object.
+
+ Setting the accept flag indicates that the receiver of this event
+ agrees to close the widget.
+
+ The accept flag is \e not set by default.
+
+ If you choose to accept in TQWidget::closeEvent(), the widget will
+ be hidden. If the widget's \c WDestructiveClose flag is set, it
+ will also be destroyed.
+
+ \sa ignore(), TQWidget::hide()
+*/
+
+/*!
+ \fn void TQCloseEvent::ignore()
+
+ Clears the accept flag of the close event object.
+
+ Clearing the accept flag indicates that the receiver of this event
+ does not want the widget to be closed.
+
+ The close event is constructed with the accept flag cleared.
+
+ \sa accept()
+*/
+
+/*!
+ \class TQIconDragEvent tqevent.h
+ \brief The TQIconDragEvent class Q_SIGNALS that a main icon drag has begun.
+
+ \ingroup events
+
+ Icon drag events are sent to widgets when the main icon of a window has been dragged away.
+ On Mac OS X this is fired when the proxy icon of a window is dragged off titlebar, in response to
+ this event is is normal to begin using drag and drop.
+*/
+
+/*!
+ \fn TQIconDragEvent::TQIconDragEvent()
+
+ Constructs an icon drag event object with the accept parameter
+ flag set to FALSE.
+
+ \sa accept()
+*/
+
+/*!
+ \fn bool TQIconDragEvent::isAccepted() const
+
+ Returns TRUE if the receiver of the event has started a drag and
+ drop operation; otherwise returns FALSE.
+
+ \sa accept(), ignore()
+*/
+
+/*!
+ \fn void TQIconDragEvent::accept()
+
+ Sets the accept flag of the icon drag event object.
+
+ Setting the accept flag indicates that the receiver of this event
+ has started a drag and drop oeration.
+
+ The accept flag is \e not set by default.
+
+ \sa ignore(), TQWidget::hide()
+*/
+
+/*!
+ \fn void TQIconDragEvent::ignore()
+
+ Clears the accept flag of the icon drag object.
+
+ Clearing the accept flag indicates that the receiver of this event
+ has not handled the icon drag as a result other events can be sent.
+
+ The icon drag event is constructed with the accept flag cleared.
+
+ \sa accept()
+*/
+
+/*!
+ \class TQContextMenuEvent tqevent.h
+ \brief The TQContextMenuEvent class tqcontains parameters that describe a context menu event.
+
+ \ingroup events
+
+ Context menu events are sent to widgets when a user triggers a
+ context menu. What triggers this is platform dependent. For
+ example, on Windows, pressing the menu button or releasing the
+ right mouse button will cause this event to be sent.
+
+ When this event occurs it is customary to show a TQPopupMenu with a
+ context menu, if this is relevant to the context.
+
+ Context menu events contain a special accept flag that indicates
+ whether the receiver accepted the event. If the event handler does
+ not accept the event, then whatever triggered the event will be
+ handled as a regular input event if possible.
+
+ \sa TQPopupMenu
+*/
+
+/*!
+ \fn TQContextMenuEvent::TQContextMenuEvent( Reason reason, const TQPoint &pos, const TQPoint &globalPos, int state )
+
+ Constructs a context menu event object with the accept parameter
+ flag set to FALSE.
+
+ The \a reason parameter must be \c TQContextMenuEvent::Mouse or \c
+ TQContextMenuEvent::Keyboard.
+
+ The \a pos parameter specifies the mouse position relative to the
+ receiving widget. \a globalPos is the mouse position in absolute
+ coordinates. \a state is the ButtonState at the time of the event.
+*/
+
+
+/*!
+ \fn TQContextMenuEvent::TQContextMenuEvent( Reason reason, const TQPoint &pos, int state )
+
+ Constructs a context menu event object with the accept parameter
+ flag set to FALSE.
+
+ The \a reason parameter must be \c TQContextMenuEvent::Mouse or \c
+ TQContextMenuEvent::Keyboard.
+
+ The \a pos parameter specifies the mouse position relative to the
+ receiving widget. \a state is the ButtonState at the time of the
+ event.
+
+ The globalPos() is initialized to TQCursor::pos(), which may not be
+ appropriate. Use the other constructor to specify the global
+ position explicitly.
+*/
+
+TQContextMenuEvent::TQContextMenuEvent( Reason reason, const TQPoint &pos, int state )
+ : TQEvent( ContextMenu ), p( pos ), accpt(TRUE), consum(TRUE),
+ reas( reason ), s((ushort)state)
+{
+ gp = TQCursor::pos();
+}
+
+/*!
+ \fn const TQPoint &TQContextMenuEvent::pos() const
+
+ Returns the position of the mouse pointer relative to the widget
+ that received the event.
+
+ \sa x(), y(), globalPos()
+*/
+
+/*!
+ \fn int TQContextMenuEvent::x() const
+
+ Returns the x-position of the mouse pointer, relative to the
+ widget that received the event.
+
+ \sa y(), pos()
+*/
+
+/*!
+ \fn int TQContextMenuEvent::y() const
+
+ Returns the y-position of the mouse pointer, relative to the
+ widget that received the event.
+
+ \sa x(), pos()
+*/
+
+/*!
+ \fn const TQPoint &TQContextMenuEvent::globalPos() const
+
+ Returns the global position of the mouse pointer at the time of
+ the event.
+
+ \sa x(), y(), pos()
+*/
+
+/*!
+ \fn int TQContextMenuEvent::globalX() const
+
+ Returns the global x-position of the mouse pointer at the time of
+ the event.
+
+ \sa globalY(), globalPos()
+*/
+
+/*!
+ \fn int TQContextMenuEvent::globalY() const
+
+ Returns the global y-position of the mouse pointer at the time of
+ the event.
+
+ \sa globalX(), globalPos()
+*/
+
+/*!
+ \fn ButtonState TQContextMenuEvent::state() const
+
+ Returns the button state (a combination of mouse buttons and
+ keyboard modifiers), i.e. what buttons and keys were being
+ pressed immediately before the event was generated.
+
+ The returned value is \c LeftButton, \c RightButton, \c MidButton,
+ \c ShiftButton, \c ControlButton and \c AltButton OR'ed together.
+*/
+
+/*!
+ \fn bool TQContextMenuEvent::isConsumed() const
+
+ Returns TRUE (which stops propagation of the event) if the
+ receiver has blocked the event; otherwise returns FALSE.
+
+ \sa accept(), ignore(), consume()
+*/
+
+/*!
+ \fn void TQContextMenuEvent::consume()
+
+ Sets the consume flag of the context event object.
+
+ Setting the consume flag indicates that the receiver of this event
+ does not want the event to be propagated further (i.e. not sent to
+ tqparent classes.)
+
+ The consumed flag is not set by default.
+
+ \sa ignore() accept()
+*/
+
+/*!
+ \fn bool TQContextMenuEvent::isAccepted() const
+
+ Returns TRUE if the receiver has processed the event; otherwise
+ returns FALSE.
+
+ \sa accept(), ignore(), consume()
+*/
+
+/*!
+ \fn void TQContextMenuEvent::accept()
+
+ Sets the accept flag of the context event object.
+
+ Setting the accept flag indicates that the receiver of this event
+ has processed the event. Processing the event means you did
+ something with it and it will be implicitly consumed.
+
+ The accept flag is not set by default.
+
+ \sa ignore() consume()
+*/
+
+/*!
+ \fn void TQContextMenuEvent::ignore()
+
+ Clears the accept flag of the context event object.
+
+ Clearing the accept flag indicates that the receiver of this event
+ does not need to show a context menu. This will implicitly remove
+ the consumed flag as well.
+
+ The accept flag is not set by default.
+
+ \sa accept() consume()
+*/
+
+/*!
+ \enum TQContextMenuEvent::Reason
+
+ This enum describes the reason the ContextMenuEvent was sent. The
+ values are:
+
+ \value Mouse The mouse caused the event to be sent. Normally this
+ means the right mouse button was clicked, but this is platform
+ specific.
+
+ \value Keyboard The keyboard caused this event to be sent. On
+ Windows this means the menu button was pressed.
+
+ \value Other The event was sent by some other means (i.e. not by
+ the mouse or keyboard).
+*/
+
+
+/*!
+ \fn TQContextMenuEvent::Reason TQContextMenuEvent::reason() const
+
+ Returns the reason for this context event.
+*/
+
+
+/*!
+ \class TQIMEvent tqevent.h
+ \brief The TQIMEvent class provides parameters for input method events.
+
+ \ingroup events
+
+ Input method events are sent to widgets when an input method is
+ used to enter text into a widget. Input methods are widely used to
+ enter text in Asian and other complex languages.
+
+ The events are of interest to widgets that accept keyboard input
+ and want to be able to correctly handle complex languages. Text
+ input in such languages is usually a three step process.
+
+ \list 1
+ \i <b>Starting to Compose</b><br>
+ When the user presses the first key on a keyboard an input context
+ is created. This input context will contain a string with the
+ typed characters.
+
+ \i <b>Composing</b><br>
+ With every new key pressed, the input method will try to create a
+ matching string for the text typed so far. While the input context
+ is active, the user can only move the cursor inside the string
+ belonging to this input context.
+
+ \i <b>Completing</b><br>
+ At some point, e.g. when the user presses the Spacebar, they get
+ to this stage, where they can choose from a number of strings that
+ match the text they have typed so far. The user can press Enter to
+ confirm their choice or Escape to cancel the input; in either case
+ the input context will be closed.
+ \endlist
+
+ Note that the particular key presses used for a given input
+ context may differ from those we've mentioned here, i.e. they may
+ not be Spacebar, Enter and Escape.
+
+ These three stages are represented by three different types of
+ events. The IMStartEvent, IMComposeEvent and IMEndEvent. When a
+ new input context is created, an IMStartEvent will be sent to the
+ widget and delivered to the \l TQWidget::imStartEvent() function.
+ The widget can then update internal data structures to reflect
+ this.
+
+ After this, an IMComposeEvent will be sent to the widget for
+ every key the user presses. It will contain the current
+ composition string the widget has to show and the current cursor
+ position within the composition string. This string is temporary
+ and can change with every key the user types, so the widget will
+ need to store the state before the composition started (the state
+ it had when it received the IMStartEvent). IMComposeEvents will be
+ delivered to the \l TQWidget::imComposeEvent() function.
+
+ Usually, widgets try to mark the part of the text that is part of
+ the current composition in a way that is visible to the user. A
+ commonly used visual cue is to use a dotted underline.
+
+ After the user has selected the final string, an IMEndEvent will
+ be sent to the widget. The event tqcontains the final string the
+ user selected, and could be empty if they canceled the
+ composition. This string should be accepted as the final text the
+ user entered, and the intermediate composition string should be
+ cleared. These events are delivered to \l TQWidget::imEndEvent().
+
+ If the user clicks another widget, taking the focus out of the
+ widget where the composition is taking place the IMEndEvent will
+ be sent and the string it holds will be the result of the
+ composition up to that point (which may be an empty string).
+*/
+
+/*!
+ \fn TQIMEvent::TQIMEvent( Type type, const TQString &text, int cursorPosition )
+
+ Constructs a new TQIMEvent with the accept flag set to FALSE. \a
+ type can be one of TQEvent::IMStartEvent, TQEvent::IMComposeEvent
+ or TQEvent::IMEndEvent. \a text tqcontains the current compostion
+ string and \a cursorPosition the current position of the cursor
+ inside \a text.
+*/
+
+/*!
+ \fn const TQString &TQIMEvent::text() const
+
+ Returns the composition text. This is a null string for an
+ IMStartEvent, and tqcontains the final accepted string (which may be
+ empty) in the IMEndEvent.
+*/
+
+/*!
+ \fn int TQIMEvent::cursorPos() const
+
+ Returns the current cursor position inside the composition string.
+ Will return -1 for IMStartEvent and IMEndEvent.
+*/
+
+/*!
+ \fn int TQIMEvent::selectionLength() const
+
+ Returns the number of characters in the composition string (
+ starting at cursorPos() ) that should be marked as selected by the
+ input widget receiving the event.
+ Will return 0 for IMStartEvent and IMEndEvent.
+*/
+
+/*!
+ \fn bool TQIMEvent::isAccepted() const
+
+ Returns TRUE if the receiver of the event processed the event;
+ otherwise returns FALSE.
+*/
+
+/*!
+ \fn void TQIMEvent::accept()
+
+ Sets the accept flag of the input method event object.
+
+ Setting the accept parameter indicates that the receiver of the
+ event processed the input method event.
+
+ The accept flag is not set by default.
+
+ \sa ignore()
+*/
+
+
+/*!
+ \fn void TQIMEvent::ignore()
+
+ Clears the accept flag parameter of the input method event object.
+
+ Clearing the accept parameter indicates that the event receiver
+ does not want the input method event.
+
+ The accept flag is cleared by default.
+
+ \sa accept()
+*/
+
+/*!
+ \class TQTabletEvent tqevent.h
+ \brief The TQTabletEvent class tqcontains parameters that describe a Tablet
+ event.
+
+ \ingroup events
+
+ Tablet Events are generated from a Wacom&copy; tablet. Most of
+ the time you will want to deal with events from the tablet as if
+ they were events from a mouse, for example retrieving the position
+ with x(), y(), pos(), globalX(), globalY() and globalPos(). In
+ some situations you may wish to retrieve the extra information
+ provided by the tablet tqdevice driver, for example, you might want
+ to adjust color brightness based on pressure. TQTabletEvent allows
+ you to get the pressure(), the xTilt() and yTilt(), as well as the
+ type of tqdevice being used with tqdevice() (see \l{TabletDevice}).
+
+ A tablet event tqcontains a special accept flag that indicates
+ whether the receiver wants the event. You should call
+ TQTabletEvent::accept() if you handle the tablet event; otherwise
+ it will be sent to the tqparent widget.
+
+ The TQWidget::setEnabled() function can be used to enable or
+ disable mouse and keyboard events for a widget.
+
+ The event handler TQWidget::tabletEvent() receives all three types of tablet
+ events. TQt will first send a tabletEvent and then, if it is not accepted,
+ it will send a mouse event. This allows applications that don't utilize
+ tablets to use a tablet like a mouse while also enabling those who want to
+ use both tablets and mouses differently.
+
+*/
+
+/*!
+ \enum TQTabletEvent::TabletDevice
+
+ This enum defines what type of tqdevice is generating the event.
+
+ \value NoDevice No tqdevice, or an unknown tqdevice.
+ \value Puck A Puck (a tqdevice that is similar to a flat mouse with
+ a transtqparent circle with cross-hairs).
+ \value Stylus A Stylus (the narrow end of the pen).
+ \value Eraser An Eraser (the broad end of the pen).
+ \omit
+ \value Menu A menu button was pressed (currently unimplemented).
+*/
+
+/*!
+ \fn TQTabletEvent::TQTabletEvent( Type t, const TQPoint &pos,
+ const TQPoint &globalPos, int tqdevice,
+ int pressure, int xTilt, int yTilt,
+ const TQPair<int,int> &uId )
+ Construct a tablet event of type \a t. The position of when the event occurred is given
+ int \a pos and \a globalPos. \a tqdevice tqcontains the \link TabletDevice tqdevice type\endlink,
+ \a pressure tqcontains the pressure exerted on the \a tqdevice, \a xTilt and \a yTilt contain
+ \a tqdevice's degree of tilt from the X and Y axis respectively. The \a uId tqcontains an
+ event id.
+
+ On Irix, \a globalPos will contain the high-resolution coordinates received from the
+ tablet tqdevice driver, instead of from the windowing system.
+
+ \sa pos(), globalPos(), tqdevice(), pressure(), xTilt(), yTilt()
+*/
+
+TQTabletEvent::TQTabletEvent( Type t, const TQPoint &pos, const TQPoint &globalPos, int tqdevice,
+ int pressure, int xTilt, int yTilt,
+ const TQPair<int, int> &uId )
+ : TQEvent( t ),
+ mPos( pos ),
+ mGPos( globalPos ),
+ mDev( tqdevice ),
+ mPress( pressure ),
+ mXT( xTilt ),
+ mYT( yTilt ),
+ mType( uId.first ),
+ mPhy( uId.second ),
+ mbAcc(TRUE)
+{}
+
+/*!
+ \obsolete
+ \fn TQTabletEvent::TQTabletEvent( const TQPoint &pos, const TQPoint &globalPos, int tqdevice, int pressure, int xTilt, int yTilt, const TQPair<int,int> &uId )
+
+ Constructs a tablet event object. The position when the event
+ occurred is is given in \a pos and \a globalPos. \a tqdevice
+ tqcontains the \link TabletDevice tqdevice type\endlink, \a pressure
+ tqcontains the pressure exerted on the \a tqdevice, \a xTilt and \a
+ yTilt contain the \a tqdevice's degrees of tilt from the X and Y
+ axis respectively. The \a uId tqcontains an event id.
+
+ On Irix, \a globalPos will contain the high-resolution coordinates
+ received from the tablet tqdevice driver, instead of from the
+ windowing system.
+
+ \sa pos(), globalPos(), tqdevice(), pressure(), xTilt(), yTilt()
+*/
+
+/*!
+ \fn TabletDevices TQTabletEvent::tqdevice() const
+
+ Returns the type of tqdevice that generated the event. Useful if you
+ want one end of the pen to do something different than the other.
+
+ \sa TabletDevice
+*/
+
+/*!
+ \fn int TQTabletEvent::pressure() const
+
+ Returns the pressure that is exerted on the tqdevice. This number is
+ a value from 0 (no pressure) to 255 (maximum pressure). The
+ pressure is always scaled to be within this range no matter how
+ many pressure levels the underlying hardware supports.
+*/
+
+/*!
+ \fn int TQTabletEvent::xTilt() const
+
+ Returns the difference from the perpendicular in the X Axis.
+ Positive values are towards the tablet's physical right. The angle
+ is in the range -60 to +60 degrees.
+
+ \sa yTilt()
+*/
+
+/*!
+ \fn int TQTabletEvent::yTilt() const
+
+ Returns the difference from the perpendicular in the Y Axis.
+ Positive values are towards the bottom of the tablet. The angle is
+ within the range -60 to +60 degrees.
+
+ \sa xTilt()
+*/
+
+/*!
+ \fn const TQPoint &TQTabletEvent::pos() const
+
+ Returns the position of the tqdevice, relative to the widget that
+ received the event.
+
+ If you move widgets around in response to mouse events, use
+ globalPos() instead of this function.
+
+ \sa x(), y(), globalPos()
+*/
+
+/*!
+ \fn int TQTabletEvent::x() const
+
+ Returns the x-position of the tqdevice, relative to the widget that
+ received the event.
+
+ \sa y(), pos()
+*/
+
+/*!
+ \fn int TQTabletEvent::y() const
+
+ Returns the y-position of the tqdevice, relative to the widget that
+ received the event.
+
+ \sa x(), pos()
+*/
+
+/*!
+ \fn const TQPoint &TQTabletEvent::globalPos() const
+
+ Returns the global position of the tqdevice \e{at the time of the
+ event}. This is important on asynchronous windows systems like X11;
+ whenever you move your widgets around in response to mouse events,
+ globalPos() can differ significantly from the current position
+ TQCursor::pos().
+
+ \sa globalX(), globalY()
+*/
+
+/*!
+ \fn int TQTabletEvent::globalX() const
+
+ Returns the global x-position of the mouse pointer at the time of
+ the event.
+
+ \sa globalY(), globalPos()
+*/
+
+/*!
+ \fn int TQTabletEvent::globalY() const
+
+ Returns the global y-position of the mouse pointer at the time of
+ the event.
+
+ \sa globalX(), globalPos()
+*/
+
+/*!
+ \fn bool TQTabletEvent::isAccepted() const
+
+ Returns TRUE if the receiver of the event handles the tablet
+ event; otherwise returns FALSE.
+*/
+
+/*!
+ \fn void TQTabletEvent::accept()
+
+ Sets the accept flag of the tablet event object.
+
+ Setting the accept flag indicates that the receiver of the event
+ wants the tablet event. Unwanted tablet events are sent to the
+ tqparent widget.
+
+ The accept flag is set by default.
+
+ \sa ignore()
+*/
+
+/*!
+ \fn void TQTabletEvent::ignore()
+
+ Clears the accept flag parameter of the tablet event object.
+
+ Clearing the accept flag indicates that the event receiver does
+ not want the tablet event. Unwanted tablet events are sent to the
+ tqparent widget.
+
+ The accept flag is set by default.
+
+ \sa accept()
+*/
+
+/*!
+ \fn TQPair<int, int> TQTabletEvent::uniqueId()
+
+ Returns a unique ID for the current tqdevice. It is possible to
+ generate a unique ID for any Wacom&copy; tqdevice. This makes it
+ possible to differentiate between multiple tqdevices being used at
+ the same time on the tablet. The \c first member tqcontains a value
+ for the type, the \c second member tqcontains a physical ID obtained
+ from the tqdevice. Each combination of these values is unique. Note:
+ for different platforms, the \c first value is different due to
+ different driver implementations.
+*/
+
+/*!
+ \class TQChildEvent tqevent.h
+ \brief The TQChildEvent class tqcontains event parameters for child object
+ events.
+
+ \ingroup events
+
+ Child events are sent to objects when tqchildren are inserted or
+ removed.
+
+ A \c ChildRemoved event is sent immediately, but a \c
+ ChildInserted event is \e posted (with TQApplication::postEvent()).
+
+ Note that if a child is removed immediately after it is inserted,
+ the \c ChildInserted event may be suppressed, but the \c
+ ChildRemoved event will always be sent. In this case there will be
+ a \c ChildRemoved event without a corresponding \c ChildInserted
+ event.
+
+ The handler for these events is TQObject::childEvent().
+*/
+
+/*!
+ \fn TQChildEvent::TQChildEvent( Type type, TQObject *child )
+
+ Constructs a child event object. The \a child is the object that
+ is to be removed or inserted.
+
+ The \a type parameter must be either \c TQEvent::ChildInserted or
+ \c TQEvent::ChildRemoved.
+*/
+
+/*!
+ \fn TQObject *TQChildEvent::child() const
+
+ Returns the child widget that was inserted or removed.
+*/
+
+/*!
+ \fn bool TQChildEvent::inserted() const
+
+ Returns TRUE if the widget received a new child; otherwise returns
+ FALSE.
+*/
+
+/*!
+ \fn bool TQChildEvent::removed() const
+
+ Returns TRUE if the object lost a child; otherwise returns FALSE.
+*/
+
+
+
+
+/*!
+ \class TQCustomEvent tqevent.h
+ \brief The TQCustomEvent class provides support for custom events.
+
+ \ingroup events
+
+ TQCustomEvent is a generic event class for user-defined events.
+ User defined events can be sent to widgets or other TQObject
+ instances using TQApplication::postEvent() or
+ TQApplication::sendEvent(). Subclasses of TQObject can easily
+ receive custom events by implementing the TQObject::customEvent()
+ event handler function.
+
+ TQCustomEvent objects should be created with a type ID that
+ uniquely identifies the event type. To avoid clashes with the
+ TQt-defined events types, the value should be at least as large as
+ the value of the "User" entry in the TQEvent::Type enum.
+
+ TQCustomEvent tqcontains a generic void* data member that may be used
+ for transferring event-specific data to the receiver. Note that
+ since events are normally delivered asynchronously, the data
+ pointer, if used, must remain valid until the event has been
+ received and processed.
+
+ TQCustomEvent can be used as-is for simple user-defined event
+ types, but normally you will want to make a subclass of it for
+ your event types. In a subclass, you can add data members that are
+ suitable for your event type.
+
+ Example:
+ \code
+ class ColorChangeEvent : public TQCustomEvent
+ {
+ public:
+ ColorChangeEvent( TQColor color )
+ : TQCustomEvent( 65432 ), c( color ) {}
+ TQColor color() const { return c; }
+ private:
+ TQColor c;
+ };
+
+ // To send an event of this custom event type:
+
+ ColorChangeEvent* ce = new ColorChangeEvent( blue );
+ TQApplication::postEvent( receiver, ce ); // TQt will delete it when done
+
+ // To receive an event of this custom event type:
+
+ void MyWidget::customEvent( TQCustomEvent * e )
+ {
+ if ( e->type() == 65432 ) { // It must be a ColorChangeEvent
+ ColorChangeEvent* ce = (ColorChangeEvent*)e;
+ newColor = ce->color();
+ }
+ }
+ \endcode
+
+ \sa TQWidget::customEvent(), TQApplication::notify()
+*/
+
+
+/*!
+ Constructs a custom event object with event type \a type. The
+ value of \a type must be at least as large as TQEvent::User. The
+ data pointer is set to 0.
+*/
+
+TQCustomEvent::TQCustomEvent( int type )
+ : TQEvent( (TQEvent::Type)type ), d( 0 )
+{
+}
+
+
+/*!
+ \fn TQCustomEvent::TQCustomEvent( Type type, void *data )
+
+ Constructs a custom event object with the event type \a type and a
+ pointer to \a data. (Note that any int value may safely be cast to
+ TQEvent::Type).
+*/
+
+
+/*!
+ \fn void TQCustomEvent::setData( void* data )
+
+ Sets the generic data pointer to \a data.
+
+ \sa data()
+*/
+
+/*!
+ \fn void *TQCustomEvent::data() const
+
+ Returns a pointer to the generic event data.
+
+ \sa setData()
+*/
+
+
+
+/*!
+ \fn TQDragMoveEvent::TQDragMoveEvent( const TQPoint& pos, Type type )
+
+ Creates a TQDragMoveEvent for which the mouse is at point \a pos,
+ and the event is of type \a type.
+
+ \warning Do not create a TQDragMoveEvent yourself since these
+ objects rely on TQt's internal state.
+*/
+
+/*!
+ \fn void TQDragMoveEvent::accept( const TQRect & r )
+
+ The same as accept(), but also notifies that future moves will
+ also be acceptable if they remain within the rectangle \a r on the
+ widget: this can improve performance, but may also be ignored by
+ the underlying system.
+
+ If the rectangle is \link TQRect::isEmpty() empty\endlink, then
+ drag move events will be sent continuously. This is useful if the
+ source is scrolling in a timer event.
+*/
+
+/*!
+ \fn void TQDragMoveEvent::ignore( const TQRect & r)
+
+ The opposite of accept(const TQRect&), i.e. says that moves within
+ rectangle \a r are not acceptable (will be ignored).
+*/
+
+/*!
+ \fn TQRect TQDragMoveEvent::answerRect() const
+
+ Returns the rectangle for which the acceptance of the move event
+ applies.
+*/
+
+
+
+/*!
+ \fn const TQPoint& TQDropEvent::pos() const
+
+ Returns the position where the drop was made.
+*/
+
+/*!
+ \fn bool TQDropEvent::isAccepted () const
+
+ Returns TRUE if the drop target accepts the event; otherwise
+ returns FALSE.
+*/
+
+/*!
+ \fn void TQDropEvent::accept(bool y=TRUE)
+
+ Call this function to indicate whether the event provided data
+ which your widget processed. Set \a y to TRUE (the default) if
+ your widget could process the data, otherwise set \a y to FALSE.
+ To get the data, use tqencodedData(), or preferably, the decode()
+ methods of existing TQDragObject subclasses, such as
+ TQTextDrag::decode(), or your own subclasses.
+
+ \sa acceptAction()
+*/
+
+/*!
+ \fn void TQDropEvent::acceptAction(bool y=TRUE)
+
+ Call this to indicate that the action described by action() is
+ accepted (i.e. if \a y is TRUE, which is the default), not merely
+ the default copy action. If you call acceptAction(TRUE), there is
+ no need to also call accept(TRUE).
+*/
+
+/*!
+ \fn void TQDragMoveEvent::accept( bool y )
+ \reimp
+ \internal
+ Remove in 3.0
+*/
+
+/*!
+ \fn void TQDragMoveEvent::ignore()
+ \reimp
+ \internal
+ Remove in 3.0
+*/
+
+
+/*!
+ \enum TQDropEvent::Action
+
+ This enum describes the action which a source requests that a
+ target perform with dropped data.
+
+ \value Copy The default action. The source simply uses the data
+ provided in the operation.
+ \value Link The source should somehow create a link to the
+ location specified by the data.
+ \value Move The source should somehow move the object from the
+ location specified by the data to a new location.
+ \value Private The target has special knowledge of the MIME type,
+ which the source should respond to in a similar way to
+ a Copy.
+ \value UserAction The source and target can co-operate using
+ special actions. This feature is not currently
+ supported.
+
+ The Link and Move actions only makes sense if the data is a
+ reference, for example, text/uri-list file lists (see TQUriDrag).
+*/
+
+/*!
+ \fn void TQDropEvent::setAction( Action a )
+
+ Sets the action to \a a. This is used internally, you should not
+ need to call this in your code: the \e source decides the action,
+ not the target.
+*/
+
+/*!
+ \fn Action TQDropEvent::action() const
+
+ Returns the Action which the target is requesting to be performed
+ with the data. If your application understands the action and can
+ process the supplied data, call acceptAction(); if your
+ application can process the supplied data but can only perform the
+ Copy action, call accept().
+*/
+
+/*!
+ \fn void TQDropEvent::ignore()
+
+ The opposite of accept(), i.e. you have ignored the drop event.
+*/
+
+/*!
+ \fn bool TQDropEvent::isActionAccepted () const
+
+ Returns TRUE if the drop action was accepted by the drop site;
+ otherwise returns FALSE.
+*/
+
+
+/*!
+ \fn void TQDropEvent::setPoint (const TQPoint & np)
+
+ Sets the drop to happen at point \a np. You do not normally need
+ to use this as it will be set internally before your widget
+ receives the drop event.
+*/ // ### here too - what coordinate system?
+
+
+/*!
+ \class TQDragEnterEvent tqevent.h
+ \brief The TQDragEnterEvent class provides an event which is sent to the widget when a drag and drop first drags onto the widget.
+
+ \ingroup events
+ \ingroup draganddrop
+
+ This event is always immediately followed by a TQDragMoveEvent, so
+ you only need to respond to one or the other event. This class
+ inherits most of its functionality from TQDragMoveEvent, which in
+ turn inherits most of its functionality from TQDropEvent.
+
+ \sa TQDragLeaveEvent, TQDragMoveEvent, TQDropEvent
+*/
+
+/*!
+ \fn TQDragEnterEvent::TQDragEnterEvent (const TQPoint & pos)
+
+ Constructs a TQDragEnterEvent entering at the given point, \a pos.
+
+ \warning Do not create a TQDragEnterEvent yourself since these
+ objects rely on TQt's internal state.
+*/
+
+/*!
+ \class TQDragLeaveEvent tqevent.h
+ \brief The TQDragLeaveEvent class provides an event which is sent to the widget when a drag and drop leaves the widget.
+
+ \ingroup events
+ \ingroup draganddrop
+
+ This event is always preceded by a TQDragEnterEvent and a series of
+ \l{TQDragMoveEvent}s. It is not sent if a TQDropEvent is sent
+ instead.
+
+ \sa TQDragEnterEvent, TQDragMoveEvent, TQDropEvent
+*/
+
+/*!
+ \fn TQDragLeaveEvent::TQDragLeaveEvent()
+
+ Constructs a TQDragLeaveEvent.
+
+ \warning Do not create a TQDragLeaveEvent yourself since these
+ objects rely on TQt's internal state.
+*/
+
+/*!
+ \class TQHideEvent tqevent.h
+ \brief The TQHideEvent class provides an event which is sent after a widget is hidden.
+
+ \ingroup events
+
+ This event is sent just before TQWidget::hide() returns, and also
+ when a top-level window has been hidden (iconified) by the user.
+
+ If spontaneous() is TRUE the event originated outside the
+ application, i.e. the user hid the window using the window manager
+ controls, either by iconifying the window or by switching to
+ another virtual desktop where the window isn't visible. The window
+ will become hidden but not withdrawn. If the window was iconified,
+ TQWidget::isMinimized() returns TRUE.
+
+ \sa TQShowEvent
+*/
+
+/*!
+ \fn TQHideEvent::TQHideEvent()
+
+ Constructs a TQHideEvent.
+*/
+
+/*!
+ \class TQShowEvent tqevent.h
+ \brief The TQShowEvent class provides an event which is sent when a widget is shown.
+
+ \ingroup events
+
+ There are two kinds of show events: show events caused by the
+ window system (spontaneous) and internal show events. Spontaneous
+ show events are sent just after the window system shows the
+ window, including after a top-level window has been shown
+ (un-iconified) by the user. Internal show events are delivered
+ just before the widget becomes visible.
+
+ \sa TQHideEvent
+*/
+
+/*!
+ \fn TQShowEvent::TQShowEvent()
+
+ Constructs a TQShowEvent.
+*/
+
+
+/*!
+ \fn TQByteArray TQDropEvent::data(const char* f) const
+
+ \obsolete
+
+ Use TQDropEvent::tqencodedData().
+*/
+
+
+/*!
+ Destroys the event. If it was \link
+ TQApplication::postEvent() posted \endlink,
+ it will be removed from the list of events to be posted.
+*/
+
+TQEvent::~TQEvent()
+{
+ if ( posted && tqApp )
+ TQApplication::removePostedEvent( this );
+}
+
+#endif // USE_QT4 \ No newline at end of file