/********************************************************************** ** ** Implementation of TQComboBox widget class ** ** Created : 940426 ** ** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. ** ** This file is part of the widgets 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 "ntqcombobox.h" #ifndef QT_NO_COMBOBOX #include "ntqpopupmenu.h" #include "ntqlistbox.h" #include "ntqpainter.h" #include "ntqdrawutil.h" #include "ntqstrlist.h" #include "ntqpixmap.h" #include "ntqtimer.h" #include "ntqapplication.h" #include "ntqlineedit.h" #include "ntqbitmap.h" #include "qeffects_p.h" #include "ntqstringlist.h" #include "ntqcombobox.h" #include "ntqstyle.h" #include #if defined(QT_ACCESSIBILITY_SUPPORT) #include "ntqaccessible.h" #endif /*! \class TQComboBox ntqcombobox.h \brief The TQComboBox widget is a combined button and popup list. \ingroup basic \mainclass A combobox is a selection widget which displays the current item and can pop up a list of items. A combobox may be editable in which case the user can enter arbitrary strings. Comboboxes provide a means of showing the user's current choice out of a list of options in a way that takes up the minimum amount of screen space. TQComboBox supports three different display styles: Aqua/Motif 1.x, Motif 2.0 and Windows. In Motif 1.x, a combobox was called XmOptionMenu. In Motif 2.0, OSF introduced an improved combobox and named that XmComboBox. TQComboBox provides both. TQComboBox provides two different constructors. The simplest constructor creates an "old-style" combobox in Motif (or Aqua) style: \code TQComboBox *c = new TQComboBox( this, "read-only combobox" ); \endcode The other constructor creates a new-style combobox in Motif style, and can create both read-only and editable comboboxes: \code TQComboBox *c1 = new TQComboBox( FALSE, this, "read-only combobox" ); TQComboBox *c2 = new TQComboBox( TRUE, this, "editable combobox" ); \endcode New-style comboboxes use a list box in both Motif and Windows styles, and both the content size and the on-screen size of the list box can be limited with sizeLimit() and setMaxCount() respectively. Old-style comboboxes use a popup in Aqua and Motif style, and that popup will happily grow larger than the desktop if you put enough data into it. The two constructors create identical-looking comboboxes in Windows style. Comboboxes can contain pixmaps as well as strings; the insertItem() and changeItem() functions are suitably overloaded. For editable comboboxes, the function clearEdit() is provided, to clear the displayed string without changing the combobox's contents. A combobox emits two signals, activated() and highlighted(), when a new item has been activated (selected) or highlighted (made current). Both signals exist in two versions, one with a \c TQString argument and one with an \c int argument. If the user highlights or activates a pixmap, only the \c int signals are emitted. Whenever the text of an editable combobox is changed the textChanged() signal is emitted. When the user enters a new string in an editable combobox, the widget may or may not insert it, and it can insert it in several locations. The default policy is is \c AtBottom but you can change this using setInsertionPolicy(). It is possible to constrain the input to an editable combobox using TQValidator; see setValidator(). By default, any input is accepted. If the combobox is not editable then it has a default focusPolicy() of \c TabFocus, i.e. it will not grab focus if clicked. This differs from both Windows and Motif. If the combobox is editable then it has a default focusPolicy() of \c StrongFocus, i.e. it will grab focus if clicked. A combobox can be populated using the insert functions, insertStringList() and insertItem() for example. Items can be changed with changeItem(). An item can be removed with removeItem() and all items can be removed with clear(). The text of the current item is returned by currentText(), and the text of a numbered item is returned with text(). The current item can be set with setCurrentItem() or setCurrentText(). The number of items in the combobox is returned by count(); the maximum number of items can be set with setMaxCount(). You can allow editing using setEditable(). For editable comboboxes you can set auto-completion using setAutoCompletion() and whether or not the user can add duplicates is set with setDuplicatesEnabled(). (Motif 1, read-only)
(Motif 2, editable)
(Motif 2, read-only)
(Windows style) Depending on the style, TQComboBox will use a TQListBox or a TQPopupMenu to display the list of items. See setListBox() for more information. \sa TQLineEdit TQListBox TQSpinBox TQRadioButton TQButtonGroup \link guibooks.html#fowler GUI Design Handbook: Combo Box,\endlink \link guibooks.html#fowler GUI Design Handbook: Drop-Down List Box.\endlink */ /*! \enum TQComboBox::Policy This enum specifies what the TQComboBox should do when a new string is entered by the user. \value NoInsertion the string will not be inserted into the combobox. \value AtTop insert the string as the first item in the combobox. \value AtCurrent replace the previously selected item with the string the user has entered. \value AtBottom insert the string as the last item in the combobox. \value AfterCurrent insert the string after the previously selected item. \value BeforeCurrent insert the string before the previously selected item. activated() is always emitted when the string is entered. If inserting the new string would cause the combobox to breach its content size limit, the item at the other end of the list is deleted. The definition of "other end" is implementation-dependent. */ /*! \fn void TQComboBox::activated( int index ) This signal is emitted when a new item has been activated (selected). The \a index is the position of the item in the combobox. This signal is not emitted if the item is changed programmatically, e.g. using setCurrentItem(). */ /*! \overload void TQComboBox::activated( const TQString &string ) This signal is emitted when a new item has been activated (selected). \a string is the selected string. You can also use the activated(int) signal, but be aware that its argument is meaningful only for selected strings, not for user entered strings. */ /*! \fn void TQComboBox::highlighted( int index ) This signal is emitted when a new item has been set to be the current item. The \a index is the position of the item in the combobox. This signal is not emitted if the item is changed programmatically, e.g. using setCurrentItem(). */ /*! \overload void TQComboBox::highlighted( const TQString &string ) This signal is emitted when a new item has been set to be the current item. \a string is the item's text. You can also use the highlighted(int) signal. */ /*! \fn void TQComboBox::textChanged( const TQString &string ) This signal is used for editable comboboxes. It is emitted whenever the contents of the text entry field changes. \a string contains the new text. */ /*! \property TQComboBox::autoCompletion \brief whether auto-completion is enabled This property can only be set for editable comboboxes, for non-editable comboboxes it has no effect. It is FALSE by default. */ /*! \property TQComboBox::autoMask \brief whether the combobox is automatically masked \sa TQWidget::setAutoMask() */ /*! \property TQComboBox::autoResize \brief whether auto resize is enabled \obsolete If this property is set to TRUE then the combobox will resize itself whenever its contents change. The default is FALSE. */ /*! \property TQComboBox::count \brief the number of items in the combobox */ /*! \property TQComboBox::currentItem \brief the index of the current item in the combobox Note that the activated() and highlighted() signals are only emitted when the user changes the current item, not when it is changed programmatically. */ /*! \property TQComboBox::currentText \brief the text of the combobox's current item */ /*! \property TQComboBox::duplicatesEnabled \brief whether duplicates are allowed If the combobox is editable and the user enters some text in the combobox's lineedit and presses Enter (and the insertionPolicy() is not \c NoInsertion), then what happens is this: \list \i If the text is not already in the list, the text is inserted. \i If the text is in the list and this property is TRUE (the default), the text is inserted. \i If the text is in the list and this property is FALSE, the text is \e not inserted; instead the item which has matching text becomes the current item. \endlist This property only affects user-interaction. You can use insertItem() to insert duplicates if you wish regardless of this setting. */ /*! \property TQComboBox::editable \brief whether the combobox is editable This property's default is FALSE. Note that the combobox will be cleared if this property is set to TRUE for a 1.x Motif style combobox. To avoid this, use setEditable() before inserting any items. Also note that the 1.x version of Motif didn't have any editable comboboxes, so the combobox will change it's appearance to a 2.0 style Motif combobox is it is set to be editable. */ /*! \property TQComboBox::insertionPolicy \brief the position of the items inserted by the user The default insertion policy is \c AtBottom. See \l Policy. */ /*! \property TQComboBox::maxCount \brief the maximum number of items allowed in the combobox */ /*! \property TQComboBox::sizeLimit \brief the maximum on-screen size of the combobox. This property is ignored for both Motif 1.x style and non-editable comboboxes in Mac style. The default limit is ten lines. If the number of items in the combobox is or grows larger than lines, a scrollbar is added. */ class TQComboBoxPopup : public TQPopupMenu { public: TQComboBoxPopup( TQWidget *parent=0, const char *name=0 ) : TQPopupMenu( parent, name ) { } int itemHeight( int index ) { return TQPopupMenu::itemHeight( index ); } }; static inline TQString escapedComboString(const TQString &str) { TQString stringToReturn = str; return stringToReturn.replace('&', "&&"); } class TQComboBoxPopupItem : public TQCustomMenuItem { TQListBoxItem *li; TQSize sc; // Size cache optimization public: TQComboBoxPopupItem(TQListBoxItem *i) : TQCustomMenuItem(), li(i), sc(0, 0) { } virtual bool fullSpan() const { return TRUE; } virtual void paint( TQPainter*, const TQColorGroup&, bool, bool, int, int, int, int); virtual TQSize sizeHint() { if (sc.isNull()) sc = TQSize(li->width(li->listBox()), TQMAX(25, li->height(li->listBox()))); return sc; } }; void TQComboBoxPopupItem::paint( TQPainter* p, const TQColorGroup&, bool, bool, int x, int y, int, int) { p->save(); p->translate(x, y + ((sizeHint().height() / 2) - (li->height(li->listBox()) / 2))); li->paint(p); p->restore(); } class TQComboBoxData { public: TQComboBoxData( TQComboBox *cb ): ed( 0 ), usingLBox( FALSE ), pop( 0 ), lBox( 0 ), combo( cb ) { duplicatesEnabled = TRUE; cb->setSizePolicy( TQSizePolicy( TQSizePolicy::Minimum, TQSizePolicy::Fixed ) ); } inline bool usingListBox() { return usingLBox; } inline TQListBox * listBox() { return lBox; } inline TQComboBoxPopup * popup() { return pop; } void updateLinedGeometry(); void setListBox( TQListBox *l ); void setPopupMenu( TQComboBoxPopup * pm, bool isPopup=TRUE ); int current; int maxCount; int sizeLimit; TQComboBox::Policy p; bool autoresize; bool poppedUp; bool mouseWasInsidePopup; bool arrowPressed; bool arrowDown; bool discardNextMousePress; bool shortClick; bool useCompletion; bool completeNow; int completeAt; bool duplicatesEnabled; int fullHeight, currHeight; TQLineEdit * ed; // /bin/ed rules! TQTimer *completionTimer; TQSize sizeHint; private: bool usingLBox; TQComboBoxPopup *pop; TQListBox *lBox; TQComboBox *combo; }; void TQComboBoxData::updateLinedGeometry() { if ( !ed || !combo ) return; TQRect r = TQStyle::visualRect( combo->style().querySubControlMetrics(TQStyle::CC_ComboBox, combo, TQStyle::SC_ComboBoxEditField), combo ); const TQPixmap *pix = current < combo->count() ? combo->pixmap( current ) : 0; if ( pix && pix->width() < r.width() ) r.setLeft( r.left() + pix->width() + 4 ); if ( r != ed->geometry() ) ed->setGeometry( r ); } void TQComboBoxData::setListBox( TQListBox *l ) { lBox = l; usingLBox = TRUE; l->setMouseTracking( TRUE ); #ifdef Q_WS_X11 l->x11SetWindowType( TQWidget::X11WindowTypeCombo ); l->x11SetWindowTransient( combo->topLevelWidget()); #endif } void TQComboBoxData::setPopupMenu( TQComboBoxPopup * pm, bool isPopup ) { pop = pm; if(isPopup) usingLBox = FALSE; #ifdef Q_WS_X11 if( pm ) { pm->x11SetWindowType( TQWidget::X11WindowTypeCombo ); pm->x11SetWindowTransient( combo->topLevelWidget()); } #endif } static inline bool checkInsertIndex( const char *method, const char * name, int count, int *index) { bool range_err = (*index > count); #if defined(QT_CHECK_RANGE) if ( range_err ) qWarning( "TQComboBox::%s: (%s) Index %d out of range", method, name ? name : "", *index ); #else Q_UNUSED( method ) Q_UNUSED( name ) #endif if ( *index < 0 ) // append *index = count; return !range_err; } static inline bool checkIndex( const char *method, const char * name, int count, int index ) { bool range_err = (index >= count); #if defined(QT_CHECK_RANGE) if ( range_err ) qWarning( "TQComboBox::%s: (%s) Index %i out of range", method, name ? name : "", index ); #else Q_UNUSED( method ) Q_UNUSED( name ) #endif return !range_err; } /*! Constructs a combobox widget with parent \a parent called \a name. This constructor creates a popup list if the program uses Motif (or Aqua) look and feel; this is compatible with Motif 1.x and Aqua. Note: If you use this constructor to create your TQComboBox, then the pixmap() function will always return 0. To workaround this, use the other constructor. */ TQComboBox::TQComboBox( TQWidget *parent, const char *name ) : TQWidget( parent, name, WNoAutoErase ) { d = new TQComboBoxData( this ); if ( style().styleHint(TQStyle::SH_ComboBox_Popup, this) || style().styleHint(TQStyle::SH_GUIStyle) == TQt::MotifStyle ) { d->setPopupMenu( new TQComboBoxPopup( this, "in-combo" ) ); d->popup()->setFont( font() ); connect( d->popup(), SIGNAL(activated(int)), SLOT(internalActivate(int)) ); connect( d->popup(), SIGNAL(highlighted(int)), SLOT(internalHighlight(int)) ); } else { setUpListBox(); } d->ed = 0; d->current = 0; d->maxCount = INT_MAX; d->sizeLimit = 10; d->p = AtBottom; d->autoresize = FALSE; d->poppedUp = FALSE; d->arrowDown = FALSE; d->arrowPressed = FALSE; d->discardNextMousePress = FALSE; d->shortClick = FALSE; d->useCompletion = FALSE; d->completeAt = 0; d->completeNow = FALSE; d->completionTimer = new TQTimer( this ); setFocusPolicy( TabFocus ); setBackgroundMode( PaletteButton ); } /*! Constructs a combobox with a maximum size and either Motif 2.0 or Windows look and feel. The input field can be edited if \a rw is TRUE, otherwise the user may only choose one of the items in the combobox. The \a parent and \a name arguments are passed on to the TQWidget constructor. */ TQComboBox::TQComboBox( bool rw, TQWidget *parent, const char *name ) : TQWidget( parent, name, WNoAutoErase ) { d = new TQComboBoxData( this ); setUpListBox(); if(d->popup() && style().styleHint(TQStyle::SH_ComboBox_Popup, this)) d->popup()->setItemChecked(d->current, FALSE); d->current = 0; d->maxCount = INT_MAX; setSizeLimit(10); d->p = AtBottom; d->autoresize = FALSE; d->poppedUp = FALSE; d->arrowDown = FALSE; d->discardNextMousePress = FALSE; d->shortClick = FALSE; d->useCompletion = FALSE; d->completeAt = 0; d->completeNow = FALSE; d->completionTimer = new TQTimer( this ); setFocusPolicy( StrongFocus ); d->ed = 0; if ( rw ) setUpLineEdit(); setBackgroundMode( PaletteButton, PaletteBase ); } /*! Destroys the combobox. */ TQComboBox::~TQComboBox() { delete d; } void TQComboBox::setDuplicatesEnabled( bool enable ) { d->duplicatesEnabled = enable; } bool TQComboBox::duplicatesEnabled() const { return d->duplicatesEnabled; } int TQComboBox::count() const { if ( d->usingListBox() ) return d->listBox()->count(); else return d->popup()->count(); } /*! \overload Inserts the \a list of strings at position \a index in the combobox. This is only for compatibility since it does not support Unicode strings. See insertStringList(). */ void TQComboBox::insertStrList( const TQStrList &list, int index ) { insertStrList( &list, index ); } /*! \overload Inserts the \a list of strings at position \a index in the combobox. This is only for compatibility since it does not support Unicode strings. See insertStringList(). */ void TQComboBox::insertStrList( const TQStrList *list, int index ) { if ( !list ) { #if defined(QT_CHECK_NULL) Q_ASSERT( list != 0 ); #endif return; } TQStrListIterator it( *list ); const char* tmp; if ( index < 0 ) index = count(); while ( (tmp=it.current()) ) { ++it; if ( d->usingListBox() ) d->listBox()->insertItem( TQString::fromLatin1(tmp), index ); else d->popup()->insertItem( escapedComboString(TQString::fromLatin1(tmp)), index, index ); if ( index++ == d->current && d->current < count() ) { if ( d->ed ) { d->ed->setText( text( d->current ) ); d->updateLinedGeometry(); } else update(); currentChanged(); } } if ( index != count() ) reIndex(); } /*! Inserts the \a list of strings at position \a index in the combobox. */ void TQComboBox::insertStringList( const TQStringList &list, int index ) { TQStringList::ConstIterator it = list.begin(); if ( index < 0 ) index = count(); while ( it != list.end() ) { if ( d->usingListBox() ) d->listBox()->insertItem( *it, index ); else d->popup()->insertItem( escapedComboString(*it), index, index ); if ( index++ == d->current && d->current < count() ) { if ( d->ed ) { d->ed->setText( text( d->current ) ); d->updateLinedGeometry(); } else update(); currentChanged(); } ++it; } if ( index != count() ) reIndex(); } /*! Inserts the array of char * \a strings at position \a index in the combobox. The \a numStrings argument is the number of strings. If \a numStrings is -1 (default), the \a strings array must be terminated with 0. Example: \code static const char* items[] = { "red", "green", "blue", 0 }; combo->insertStrList( items ); \endcode \sa insertStringList() */ void TQComboBox::insertStrList( const char **strings, int numStrings, int index) { if ( !strings ) { #if defined(QT_CHECK_NULL) Q_ASSERT( strings != 0 ); #endif return; } if ( index < 0 ) index = count(); int i = 0; while ( (numStrings<0 && strings[i]!=0) || iusingListBox() ) d->listBox()->insertItem( TQString::fromLatin1(strings[i]), index ); else d->popup()->insertItem( escapedComboString(TQString::fromLatin1(strings[i])), index, index ); i++; if ( index++ == d->current && d->current < count() ) { if ( d->ed ) { d->ed->setText( text( d->current ) ); d->updateLinedGeometry(); } else update(); currentChanged(); } } if ( index != count() ) reIndex(); } /*! Inserts a text item with text \a t, at position \a index. The item will be appended if \a index is negative. */ void TQComboBox::insertItem( const TQString &t, int index ) { int cnt = count(); if ( !checkInsertIndex( "insertItem", name(), cnt, &index ) ) return; if ( d->usingListBox() ) d->listBox()->insertItem( t, index ); else d->popup()->insertItem( escapedComboString(t), index, index ); if ( index != cnt ) reIndex(); if ( index == d->current && d->current < count() ) { if ( d->ed ) { d->ed->setText( text( d->current ) ); d->updateLinedGeometry(); } else update(); } if ( index == d->current ) currentChanged(); } /*! \overload Inserts a \a pixmap item at position \a index. The item will be appended if \a index is negative. */ void TQComboBox::insertItem( const TQPixmap &pixmap, int index ) { int cnt = count(); if ( !checkInsertIndex( "insertItem", name(), cnt, &index ) ) return; if ( d->usingListBox() ) d->listBox()->insertItem( pixmap, index ); else d->popup()->insertItem( pixmap, index, index ); if ( index != cnt ) reIndex(); if ( index == d->current && d->current < count() ) { if ( d->ed ) { d->ed->setText( text( d->current ) ); d->updateLinedGeometry(); } else update(); } if ( index == d->current ) currentChanged(); } /*! \overload Inserts a \a pixmap item with additional text \a text at position \a index. The item will be appended if \a index is negative. */ void TQComboBox::insertItem( const TQPixmap &pixmap, const TQString& text, int index ) { int cnt = count(); if ( !checkInsertIndex( "insertItem", name(), cnt, &index ) ) return; if ( d->usingListBox() ) d->listBox()->insertItem( pixmap, text, index ); else d->popup()->insertItem( pixmap, escapedComboString(text), index, index ); if ( index != cnt ) reIndex(); if ( index == d->current && d->current < count() ) { if ( d->ed ) { d->ed->setText( this->text( d->current ) ); d->updateLinedGeometry(); } else update(); } if ( index == d->current ) currentChanged(); } /*! Removes the item at position \a index. */ void TQComboBox::removeItem( int index ) { int cnt = count(); if ( !checkIndex( "removeItem", name(), cnt, index ) ) return; if ( d->usingListBox() ) { if ( style().styleHint(TQStyle::SH_ComboBox_Popup, this) && d->popup() ) d->popup()->removeItemAt( index ); d->listBox()->removeItem( index ); } else { d->popup()->removeItemAt( index ); } if ( index != cnt-1 ) reIndex(); if ( index == d->current ) { if ( d->ed ) { TQString s = TQString::fromLatin1(""); if (d->current < cnt - 1) s = text( d->current ); d->ed->setText( s ); d->updateLinedGeometry(); } else { if ( d->usingListBox() ) { d->current = d->listBox()->currentItem(); } else { if (d->current > count()-1 && d->current > 0) d->current--; } update(); } currentChanged(); } else { if ( !d->ed ) { if (d->current < cnt - 1) setCurrentItem( d->current ); else setCurrentItem( d->current - 1 ); } } } /*! Removes all combobox items. */ void TQComboBox::clear() { if ( d->usingListBox() ) { if ( style().styleHint(TQStyle::SH_ComboBox_Popup, this) && d->popup() ) d->popup()->clear(); d->listBox()->resize( 0, 0 ); d->listBox()->clear(); } else { d->popup()->clear(); } if(d->popup() && style().styleHint(TQStyle::SH_ComboBox_Popup, this)) d->popup()->setItemChecked(d->current, FALSE); d->current = 0; if ( d->ed ) { d->ed->setText( TQString::fromLatin1("") ); d->updateLinedGeometry(); } currentChanged(); } TQString TQComboBox::currentText() const { if ( d->ed ) return d->ed->text(); else if ( d->current < count() ) return text( currentItem() ); else return TQString::null; } void TQComboBox::setCurrentText( const TQString& txt ) { int i; for ( i = 0; i < count(); i++) if ( text( i ) == txt ) break; if ( i < count() ) setCurrentItem( i ); else if ( d->ed ) d->ed->setText( txt ); else changeItem( txt, currentItem() ); } /*! Returns the text item at position \a index, or TQString::null if the item is not a string. \sa currentText() */ TQString TQComboBox::text( int index ) const { if ( !checkIndex( "text", name(), count(), index ) ) return TQString::null; if ( d->usingListBox() ) { return d->listBox()->text( index ); } else { TQString retText = d->popup()->text(index); retText.replace("&&", "&"); return retText; } } /*! Returns the pixmap item at position \a index, or 0 if the item is not a pixmap. */ const TQPixmap *TQComboBox::pixmap( int index ) const { if ( !checkIndex( "pixmap", name(), count(), index ) ) return 0; if ( d->usingListBox() ) return d->listBox()->pixmap( index ); else return d->popup()->pixmap( index ); } /*! Replaces the item at position \a index with the text \a t. */ void TQComboBox::changeItem( const TQString &t, int index ) { if ( !checkIndex( "changeItem", name(), count(), index ) ) return; if ( d->usingListBox() ) d->listBox()->changeItem( t, index ); else d->popup()->changeItem( t, index ); if ( index == d->current ) { if ( d->ed ) { d->ed->setText( text( d->current ) ); d->updateLinedGeometry(); } else update(); } } /*! \overload Replaces the item at position \a index with the pixmap \a im, unless the combobox is editable. \sa insertItem() */ void TQComboBox::changeItem( const TQPixmap &im, int index ) { if ( !checkIndex( "changeItem", name(), count(), index ) ) return; if ( d->usingListBox() ) d->listBox()->changeItem( im, index ); else d->popup()->changeItem( im, index ); if ( index == d->current ) update(); } /*! \overload Replaces the item at position \a index with the pixmap \a im and the text \a t. \sa insertItem() */ void TQComboBox::changeItem( const TQPixmap &im, const TQString &t, int index ) { if ( !checkIndex( "changeItem", name(), count(), index ) ) return; if ( d->usingListBox() ) d->listBox()->changeItem( im, t, index ); else d->popup()->changeItem( im, t, index ); if ( index == d->current ) update(); } int TQComboBox::currentItem() const { return d->current; } void TQComboBox::setCurrentItem( int index ) { if ( index == d->current && !d->ed ) { return; } if ( !checkIndex( "setCurrentItem", name(), count(), index ) ) { return; } if ( d->usingListBox() && !( listBox()->item(index) && listBox()->item(index)->isSelectable() ) ) return; if(d->popup() && style().styleHint(TQStyle::SH_ComboBox_Popup, this)) d->popup()->setItemChecked(d->current, FALSE); d->current = index; d->completeAt = 0; if ( d->ed ) { d->ed->setText( text( index ) ); d->updateLinedGeometry(); } // ### We want to keep ListBox's currentItem in sync, even if NOT popuped... if ( d->usingListBox() && d->listBox() ) { d->listBox()->setCurrentItem( index ); } else { internalHighlight( index ); // internalActivate( index ); ### this leads to weird behavior, as in 3.0.1 } currentChanged(); } bool TQComboBox::autoResize() const { return d->autoresize; } void TQComboBox::setAutoResize( bool enable ) { if ( (bool)d->autoresize != enable ) { d->autoresize = enable; if ( enable ) adjustSize(); } } /*! \reimp This implementation caches the size hint to avoid resizing when the contents change dynamically. To invalidate the cached value call setFont(). */ TQSize TQComboBox::sizeHint() const { if ( isVisible() && d->sizeHint.isValid() ) return d->sizeHint; constPolish(); int i, w; TQFontMetrics fm = fontMetrics(); int maxW = count() ? 18 : 7 * fm.width(TQChar('x')) + 18; int maxH = TQMAX( fm.lineSpacing(), 14 ) + 2; if ( !d->usingListBox() ) { w = d->popup()->sizeHint().width() - 2* d->popup()->frameWidth(); if ( w > maxW ) maxW = w; } else { for( i = 0; i < count(); i++ ) { w = d->listBox()->item( i )->width( d->listBox() ); if ( w > maxW ) maxW = w; } } d->sizeHint = (style().sizeFromContents(TQStyle::CT_ComboBox, this, TQSize(maxW, maxH)). expandedTo(TQApplication::globalStrut())); return d->sizeHint; } /*! \internal Receives activated signals from an internal popup list and emits the activated() signal. */ void TQComboBox::internalActivate( int index ) { if ( d->current != index ) { if ( !d->usingListBox() || listBox()->item( index )->isSelectable() ) { if(d->popup() && style().styleHint(TQStyle::SH_ComboBox_Popup, this)) d->popup()->setItemChecked(d->current, FALSE); d->current = index; currentChanged(); } } if ( d->usingListBox() ) popDownListBox(); else d->popup()->removeEventFilter( this ); d->poppedUp = FALSE; TQString t( text( index ) ); if ( d->ed ) { d->ed->setText( t ); d->updateLinedGeometry(); } emit activated( index ); emit activated( t ); } /*! \internal Receives highlighted signals from an internal popup list and emits the highlighted() signal. */ void TQComboBox::internalHighlight( int index ) { emit highlighted( index ); TQString t = text( index ); if ( !t.isNull() ) emit highlighted( t ); } /*! \internal Receives timeouts after a click. Used to decide if a Motif style popup should stay up or not after a click. */ void TQComboBox::internalClickTimeout() { d->shortClick = FALSE; } /*! Sets the palette for both the combobox button and the combobox popup list to \a palette. */ void TQComboBox::setPalette( const TQPalette &palette ) { TQWidget::setPalette( palette ); if ( d->listBox() ) d->listBox()->setPalette( palette ); if ( d->popup() ) d->popup()->setPalette( palette ); } /*! Sets the font for both the combobox button and the combobox popup list to \a font. */ void TQComboBox::setFont( const TQFont &font ) { d->sizeHint = TQSize(); // invalidate size hint TQWidget::setFont( font ); if ( d->usingListBox() ) d->listBox()->setFont( font ); else d->popup()->setFont( font ); if (d->ed) d->ed->setFont( font ); if ( d->autoresize ) adjustSize(); } /*!\reimp */ void TQComboBox::resizeEvent( TQResizeEvent * e ) { if ( d->ed ) d->updateLinedGeometry(); if ( d->listBox() ) d->listBox()->resize( width(), d->listBox()->height() ); TQWidget::resizeEvent( e ); } /*!\reimp */ void TQComboBox::paintEvent( TQPaintEvent * ) { TQPainter p( this ); const TQColorGroup & g = colorGroup(); p.setPen(g.text()); TQStyle::SFlags flags = TQStyle::Style_Default; if (isEnabled()) flags |= TQStyle::Style_Enabled; if (hasFocus()) flags |= TQStyle::Style_HasFocus; if ( width() < 5 || height() < 5 ) { qDrawShadePanel( &p, rect(), g, FALSE, 2, &g.brush( TQColorGroup::Button ) ); return; } bool reverse = TQApplication::reverseLayout(); if ( !d->usingListBox() && style().styleHint(TQStyle::SH_GUIStyle) == TQt::MotifStyle) { // motif 1.x style int dist, buttonH, buttonW; dist = 8; buttonH = 7; buttonW = 11; int xPos; int x0; int w = width() - dist - buttonW - 1; if ( reverse ) { xPos = dist + 1; x0 = xPos + 4; } else { xPos = w; x0 = 4; } qDrawShadePanel( &p, rect(), g, FALSE, style().pixelMetric(TQStyle::PM_DefaultFrameWidth, this), &g.brush( TQColorGroup::Button ) ); qDrawShadePanel( &p, xPos, (height() - buttonH)/2, buttonW, buttonH, g, FALSE, style().pixelMetric(TQStyle::PM_DefaultFrameWidth, this) ); TQRect clip( x0, 2, w - 2 - 4 - 5, height() - 4 ); TQString str = d->popup()->text( this->d->current ); if ( !str.isNull() ) { p.drawText( clip, AlignCenter | SingleLine, str ); } TQPixmap *pix = d->popup()->pixmap( this->d->current ); TQIconSet *iconSet = d->popup()->iconSet( this->d->current ); if (pix || iconSet) { TQPixmap pm = ( pix ? *pix : iconSet->pixmap() ); p.setClipRect( clip ); p.drawPixmap( 4, (height()-pm.height())/2, pm ); p.setClipping( FALSE ); } if ( hasFocus() ) p.drawRect( xPos - 5, 4, width() - xPos + 1 , height() - 8 ); } else if(!d->usingListBox()) { style().drawComplexControl( TQStyle::CC_ComboBox, &p, this, rect(), g, flags, (uint)TQStyle::SC_All, (d->arrowDown ? TQStyle::SC_ComboBoxArrow : TQStyle::SC_None )); TQRect re = style().querySubControlMetrics( TQStyle::CC_ComboBox, this, TQStyle::SC_ComboBoxEditField ); re = TQStyle::visualRect(re, this); p.setClipRect( re ); TQString str = d->popup()->text( this->d->current ); TQPixmap *pix = d->popup()->pixmap( this->d->current ); if ( !str.isNull() ) { p.save(); p.setFont(font()); TQFontMetrics fm(font()); int x = re.x(), y = re.y() + fm.ascent(); if( pix ) x += pix->width() + 5; p.drawText( x, y, str ); p.restore(); } if ( pix ) { p.fillRect( re.x(), re.y(), pix->width() + 4, re.height(), colorGroup().brush( TQColorGroup::Base ) ); p.drawPixmap( re.x() + 2, re.y() + ( re.height() - pix->height() ) / 2, *pix ); } } else { style().drawComplexControl( TQStyle::CC_ComboBox, &p, this, rect(), g, flags, (uint)TQStyle::SC_All, (d->arrowDown ? TQStyle::SC_ComboBoxArrow : TQStyle::SC_None )); TQRect re = style().querySubControlMetrics( TQStyle::CC_ComboBox, this, TQStyle::SC_ComboBoxEditField ); re = TQStyle::visualRect(re, this); p.setClipRect( re ); if ( !d->ed ) { TQListBoxItem * item = d->listBox()->item( d->current ); if ( item ) { int itemh = item->height( d->listBox() ); p.translate( re.x(), re.y() + (re.height() - itemh)/2 ); item->paint( &p ); } } else if ( d->listBox() && d->listBox()->item( d->current ) ) { TQListBoxItem * item = d->listBox()->item( d->current ); const TQPixmap *pix = item->pixmap(); if ( pix ) { p.fillRect( re.x(), re.y(), pix->width() + 4, re.height(), colorGroup().brush( TQColorGroup::Base ) ); p.drawPixmap( re.x() + 2, re.y() + ( re.height() - pix->height() ) / 2, *pix ); } } p.setClipping( FALSE ); } } /*!\reimp */ void TQComboBox::mousePressEvent( TQMouseEvent *e ) { if ( e->button() != LeftButton ) return; if ( d->discardNextMousePress ) { d->discardNextMousePress = FALSE; return; } TQRect arrowRect = style().querySubControlMetrics( TQStyle::CC_ComboBox, this, TQStyle::SC_ComboBoxArrow); arrowRect = TQStyle::visualRect(arrowRect, this); // Correction for motif style, where arrow is smaller // and thus has a rect that doesn't fit the button. arrowRect.setHeight( TQMAX( height() - (2 * arrowRect.y()), arrowRect.height() ) ); if ( count() && ( !editable() || arrowRect.contains( e->pos() ) ) ) { d->arrowPressed = FALSE; if ( d->usingListBox() ) { listBox()->blockSignals( TRUE ); tqApp->sendEvent( listBox(), e ); // trigger the listbox's autoscroll listBox()->setCurrentItem(d->current); listBox()->blockSignals( FALSE ); popup(); if ( arrowRect.contains( e->pos() ) ) { d->arrowPressed = TRUE; d->arrowDown = TRUE; repaint( FALSE ); } } else { popup(); } TQTimer::singleShot( 200, this, SLOT(internalClickTimeout())); d->shortClick = TRUE; } } /*!\reimp */ void TQComboBox::mouseMoveEvent( TQMouseEvent * ) { } /*!\reimp */ void TQComboBox::mouseReleaseEvent( TQMouseEvent * ) { } /*!\reimp */ void TQComboBox::mouseDoubleClickEvent( TQMouseEvent *e ) { mousePressEvent( e ); } /*!\reimp */ void TQComboBox::keyPressEvent( TQKeyEvent *e ) { int c = currentItem(); if ( ( e->key() == Key_F4 && e->state() == 0 ) || ( e->key() == Key_Down && (e->state() & AltButton) ) || ( !d->ed && e->key() == Key_Space ) ) { if ( count() ) { if ( !d->usingListBox() ) d->popup()->setActiveItem( this->d->current ); popup(); } return; } else if ( d->usingListBox() && e->key() == Key_Up ) { if ( c > 0 ) setCurrentItem( c-1 ); } else if ( d->usingListBox() && e->key() == Key_Down ) { if ( ++c < count() ) setCurrentItem( c ); } else if ( d->usingListBox() && e->key() == Key_Home && ( !d->ed || !d->ed->hasFocus() ) ) { setCurrentItem( 0 ); } else if ( d->usingListBox() && e->key() == Key_End && ( !d->ed || !d->ed->hasFocus() ) ) { setCurrentItem( count()-1 ); } else if ( !d->ed && e->ascii() >= 32 && !e->text().isEmpty() ) { if ( !d->completionTimer->isActive() ) { d->completeAt = 0; c = completionIndex( e->text(), ++c ); if ( c >= 0 ) { setCurrentItem( c ); d->completeAt = e->text().length(); } } else { d->completionTimer->stop(); TQString ct = currentText().left( d->completeAt ) + e->text(); c = completionIndex( ct, c ); if ( c < 0 && d->completeAt > 0 ) { c = completionIndex( e->text(), 0 ); ct = e->text(); } d->completeAt = 0; if ( c >= 0 ) { setCurrentItem( c ); d->completeAt = ct.length(); } } d->completionTimer->start( 400, TRUE ); } else { e->ignore(); return; } c = currentItem(); if ( count() && !text( c ).isNull() ) emit activated( text( c ) ); emit activated( c ); } /*!\reimp */ void TQComboBox::focusInEvent( TQFocusEvent * e ) { TQWidget::focusInEvent( e ); d->completeNow = FALSE; d->completeAt = 0; } /*!\reimp */ void TQComboBox::focusOutEvent( TQFocusEvent * e ) { TQWidget::focusOutEvent( e ); d->completeNow = FALSE; d->completeAt = 0; } /*!\reimp */ #ifndef QT_NO_WHEELEVENT void TQComboBox::wheelEvent( TQWheelEvent *e ) { if ( d->poppedUp ) { if ( d->usingListBox() ) { TQApplication::sendEvent( d->listBox(), e ); } } else { if ( e->delta() > 0 ) { int c = currentItem(); if ( c > 0 ) { setCurrentItem( c-1 ); emit activated( currentItem() ); emit activated( currentText() ); } } else { int c = currentItem(); if ( ++c < count() ) { setCurrentItem( c ); emit activated( currentItem() ); emit activated( currentText() ); } } e->accept(); } } #endif /*! \internal Calculates the listbox height needed to contain all items, or as many as the list box is supposed to contain. */ static int listHeight( TQListBox *l, int sl ) { if ( l->count() > 0 ) return TQMIN( l->count(), (uint)sl) * l->item( 0 )->height(l); else return l->sizeHint().height(); } /*! Pops up the combobox popup list. If the list is empty, no items appear. */ void TQComboBox::popup() { if ( !count() || d->poppedUp ) return; if( !d->usingListBox() || style().styleHint(TQStyle::SH_ComboBox_Popup, this) ) { if(d->usingListBox()) { if(!d->popup()) { TQComboBoxPopup *p = new TQComboBoxPopup( this, "in-combo" ); d->setPopupMenu( p, FALSE ); p->setFont( font() ); connect( p, SIGNAL(activated(int)), SLOT(internalActivate(int)) ); connect( p, SIGNAL(highlighted(int)), SLOT(internalHighlight(int)) ); } d->popup()->clear(); for(unsigned int i = 0; i < d->listBox()->count(); i++) { TQListBoxItem *item = d->listBox()->item(i); if(item->rtti() == TQListBoxText::RTTI) { d->popup()->insertItem(escapedComboString(item->text()), i, i); } else if(item->rtti() == TQListBoxPixmap::RTTI) { if(item->pixmap()) d->popup()->insertItem(TQIconSet(*item->pixmap()), escapedComboString(item->text()), i, i); else d->popup()->insertItem(escapedComboString(item->text()), i, i); } else { d->popup()->insertItem(new TQComboBoxPopupItem(item), i, i); } } } d->popup()->installEventFilter( this ); if(d->popup() && style().styleHint(TQStyle::SH_ComboBox_Popup, this)) d->popup()->setItemChecked(this->d->current, TRUE); d->popup()->popup( mapToGlobal( TQPoint(0,0) ), this->d->current ); update(); } else { // Send all listbox events to eventFilter(): TQListBox* lb = d->listBox(); lb->triggerUpdate( TRUE ); lb->installEventFilter( this ); d->mouseWasInsidePopup = FALSE; int w = lb->variableWidth() ? lb->sizeHint().width() : width(); int h = listHeight( lb, d->sizeLimit ) + 2; TQRect screen = TQApplication::desktop()->availableGeometry( this ); int sx = screen.x(); // screen pos int sy = screen.y(); int sw = screen.width(); // screen width int sh = screen.height(); // screen height TQPoint pos = mapToGlobal( TQPoint(0,height()) ); // ## Similar code is in TQPopupMenu int x = pos.x(); int y = pos.y(); // the complete widget must be visible if ( x + w > sx + sw ) x = sx+sw - w; if ( x < sx ) x = sx; if (y + h > sy+sh && y - h - height() >= 0 ) y = y - h - height(); TQRect rect = style().querySubControlMetrics( TQStyle::CC_ComboBox, this, TQStyle::SC_ComboBoxListBoxPopup, TQStyleOption( x, y, w, h ) ); // work around older styles that don't implement the combobox // listbox popup subcontrol if ( rect.isNull() ) rect.setRect( x, y, w, h ); lb->setGeometry( rect ); lb->raise(); bool block = lb->signalsBlocked(); lb->blockSignals( TRUE ); TQListBoxItem* currentLBItem = 0; if ( editable() && currentText() != text( currentItem() ) ) currentLBItem = lb->findItem( currentText() ); currentLBItem = currentLBItem ? currentLBItem : lb->item( d->current ); lb->setCurrentItem( currentLBItem ); lb->setContentsPos( lb->contentsX(), lb->viewportToContents( lb->itemRect( currentLBItem ).topLeft() ).y() ); // set the current item to also be the selected item if it isn't already if ( currentLBItem && currentLBItem->isSelectable() && !currentLBItem->isSelected() ) lb->setSelected( currentLBItem, TRUE ); lb->blockSignals( block ); lb->setVScrollBarMode(TQScrollView::Auto); #ifndef QT_NO_EFFECTS if ( TQApplication::isEffectEnabled( UI_AnimateCombo ) ) { if ( lb->y() < mapToGlobal(TQPoint(0,0)).y() ) qScrollEffect( lb, TQEffects::UpScroll ); else qScrollEffect( lb ); } else #endif lb->show(); } d->poppedUp = TRUE; } /*! \reimp */ void TQComboBox::updateMask() { TQBitmap bm( size() ); bm.fill( color0 ); { TQPainter p( &bm, this ); style().drawComplexControlMask(TQStyle::CC_ComboBox, &p, this, rect()); } setMask( bm ); } /*! \internal Pops down (removes) the combobox popup list box. */ void TQComboBox::popDownListBox() { Q_ASSERT( d->usingListBox() ); d->listBox()->removeEventFilter( this ); d->listBox()->viewport()->removeEventFilter( this ); d->listBox()->hide(); d->listBox()->setCurrentItem( d->current ); if ( d->arrowDown ) { d->arrowDown = FALSE; repaint( FALSE ); } d->poppedUp = FALSE; } /*! \internal Re-indexes the identifiers in the popup list. */ void TQComboBox::reIndex() { if ( !d->usingListBox() ) { int cnt = count(); while ( cnt-- ) d->popup()->setId( cnt, cnt ); } } /*! \internal Repaints the combobox. */ void TQComboBox::currentChanged() { if ( d->autoresize ) adjustSize(); update(); #if defined(QT_ACCESSIBILITY_SUPPORT) TQAccessible::updateAccessibility( this, 0, TQAccessible::ValueChanged ); #endif } /*! \reimp \internal The event filter steals events from the popup or listbox when they are popped up. It makes the popup stay up after a short click in motif style. In windows style it toggles the arrow button of the combobox field, and activates an item and takes down the listbox when the mouse button is released. */ bool TQComboBox::eventFilter( TQObject *object, TQEvent *event ) { if ( !event ) return TRUE; else if ( object == d->ed ) { if ( event->type() == TQEvent::KeyPress ) { bool isAccepted = ( (TQKeyEvent*)event )->isAccepted(); keyPressEvent( (TQKeyEvent *)event ); if ( ((TQKeyEvent *)event)->isAccepted() ) { d->completeNow = FALSE; return TRUE; } else if ( ((TQKeyEvent *)event)->key() != Key_End ) { d->completeNow = TRUE; d->completeAt = d->ed->cursorPosition(); } if ( isAccepted ) ( (TQKeyEvent*)event )->accept(); else ( (TQKeyEvent*)event )->ignore(); } else if ( event->type() == TQEvent::KeyRelease ) { keyReleaseEvent( (TQKeyEvent *)event ); return ((TQKeyEvent *)event)->isAccepted(); } else if ( event->type() == TQEvent::FocusIn ) { focusInEvent( (TQFocusEvent *)event ); } else if ( event->type() == TQEvent::FocusOut ) { focusOutEvent( (TQFocusEvent *)event ); } else if ( d->useCompletion && d->completeNow ) { d->completeNow = FALSE; if ( !d->ed->text().isNull() && d->ed->cursorPosition() > d->completeAt && d->ed->cursorPosition() == (int)d->ed->text().length() ) { TQString ct( d->ed->text() ); int i = completionIndex( ct, currentItem() ); if ( i > -1 ) { TQString it = text( i ); d->ed->validateAndSet( it, ct.length(), ct.length(), it.length() ); d->current = i; // ### sets current item without emitting signals. This is to // make sure the right item is current if you change current with // wheel/up/down. While typing current is not valid anyway. Fix properly // in 4.0. } } } } else if ( d->usingListBox() && ( object == d->listBox() || object == d->listBox()->viewport() )) { TQMouseEvent *e = (TQMouseEvent*)event; switch( event->type() ) { case TQEvent::MouseMove: if ( !d->mouseWasInsidePopup ) { TQPoint pos = e->pos(); if ( d->listBox()->rect().contains( pos ) ) d->mouseWasInsidePopup = TRUE; // Check if arrow button should toggle if ( d->arrowPressed ) { TQPoint comboPos; comboPos = mapFromGlobal( d->listBox()->mapToGlobal(pos) ); TQRect arrowRect = style().querySubControlMetrics( TQStyle::CC_ComboBox, this, TQStyle::SC_ComboBoxArrow); arrowRect = TQStyle::visualRect(arrowRect, this); if ( arrowRect.contains( comboPos ) ) { if ( !d->arrowDown ) { d->arrowDown = TRUE; repaint( FALSE ); } } else { if ( d->arrowDown ) { d->arrowDown = FALSE; repaint( FALSE ); } } } } else if ((e->state() & ( RightButton | LeftButton | MidButton ) ) == 0 && style().styleHint(TQStyle::SH_ComboBox_ListMouseTracking, this)) { TQWidget *mouseW = TQApplication::widgetAt( e->globalPos(), TRUE ); if ( mouseW == d->listBox()->viewport() ) { //### TQMouseEvent m( TQEvent::MouseMove, e->pos(), e->globalPos(), LeftButton, LeftButton ); TQApplication::sendEvent( object, &m ); //### Evil return TRUE; } } break; case TQEvent::MouseButtonRelease: if ( d->listBox()->rect().contains( e->pos() ) ) { TQMouseEvent tmp( TQEvent::MouseButtonDblClick, e->pos(), e->button(), e->state() ) ; // will hide popup TQApplication::sendEvent( object, &tmp ); return TRUE; } else { if ( d->mouseWasInsidePopup ) { popDownListBox(); } else { d->arrowPressed = FALSE; if ( d->arrowDown ) { d->arrowDown = FALSE; repaint( FALSE ); } } } break; case TQEvent::MouseButtonDblClick: case TQEvent::MouseButtonPress: if ( !d->listBox()->rect().contains( e->pos() ) ) { TQPoint globalPos = d->listBox()->mapToGlobal(e->pos()); if ( TQApplication::widgetAt( globalPos, TRUE ) == this ) { d->discardNextMousePress = TRUE; // avoid popping up again } popDownListBox(); return TRUE; } break; case TQEvent::KeyPress: switch( ((TQKeyEvent *)event)->key() ) { case Key_Up: case Key_Down: if ( !(((TQKeyEvent *)event)->state() & AltButton) ) break; case Key_F4: case Key_Escape: if ( d->poppedUp ) { popDownListBox(); return TRUE; } break; case Key_Enter: case Key_Return: // work around TQDialog's enter handling return FALSE; default: break; } break; case TQEvent::Hide: popDownListBox(); break; default: break; } } else if ( (!d->usingListBox() || style().styleHint(TQStyle::SH_ComboBox_Popup, this)) && object == d->popup() ) { TQMouseEvent *e = (TQMouseEvent*)event; switch ( event->type() ) { case TQEvent::MouseButtonRelease: if ( d->shortClick ) { TQMouseEvent tmp( TQEvent::MouseMove, e->pos(), e->button(), e->state() ) ; // highlight item, but don't pop down: TQApplication::sendEvent( object, &tmp ); return TRUE; } break; case TQEvent::MouseButtonDblClick: case TQEvent::MouseButtonPress: if ( !d->popup()->rect().contains( e->pos() ) ) { d->poppedUp = FALSE; d->arrowDown = FALSE; // remove filter, event will take down popup: d->popup()->removeEventFilter( this ); // ### uglehack! // call internalHighlight so the highlighed signal // will be emitted at least as often as necessary. // it may be called more often than necessary internalHighlight( d->current ); } break; case TQEvent::Hide: d->poppedUp = FALSE; break; default: break; } } return TQWidget::eventFilter( object, event ); } /*! Returns the index of the first item \e after \a startingAt of which \a prefix is a case-insensitive prefix. Returns -1 if no items start with \a prefix. */ int TQComboBox::completionIndex( const TQString & prefix, int startingAt = 0 ) const { int start = startingAt; if ( start < 0 || start >= count() ) start = 0; if ( start >= count() ) return -1; TQString match = prefix.lower(); if ( match.length() < 1 ) return start; TQString current; int i = start; do { current = text( i ).lower(); if ( current.startsWith( match ) ) return i; i++; if ( i == count() ) i = 0; } while ( i != start ); return -1; } int TQComboBox::sizeLimit() const { return d ? d->sizeLimit : INT_MAX; } void TQComboBox::setSizeLimit( int lines ) { d->sizeLimit = lines; } int TQComboBox::maxCount() const { return d ? d->maxCount : INT_MAX; } void TQComboBox::setMaxCount( int count ) { int l = this->count(); while( --l > count ) removeItem( l ); d->maxCount = count; } TQComboBox::Policy TQComboBox::insertionPolicy() const { return d->p; } void TQComboBox::setInsertionPolicy( Policy policy ) { d->p = policy; } /*! Internal slot to keep the line editor up to date. */ void TQComboBox::returnPressed() { TQString s( d->ed->text() ); if ( s.isEmpty() ) return; int c = 0; bool doInsert = TRUE; if ( !d->duplicatesEnabled ) { for ( int i = 0; i < count(); ++i ) { if ( s == text( i ) ) { doInsert = FALSE; c = i; break; } } } if ( doInsert ) { if ( insertionPolicy() != NoInsertion ) { int cnt = count(); while ( cnt >= d->maxCount ) { removeItem( --cnt ); } } switch ( insertionPolicy() ) { case AtCurrent: if (count() == 0) insertItem(s); else if ( s != text( currentItem() ) ) changeItem( s, currentItem() ); emit activated( currentItem() ); emit activated( s ); return; case NoInsertion: emit activated( s ); return; case AtTop: c = 0; break; case AtBottom: c = count(); break; case BeforeCurrent: c = currentItem(); break; case AfterCurrent: c = count() == 0 ? 0 : currentItem() + 1; break; } insertItem( s, c ); } setCurrentItem( c ); emit activated( c ); emit activated( s ); } /*! \reimp */ void TQComboBox::setEnabled( bool enable ) { if ( !enable ) { if ( d->usingListBox() ) { popDownListBox(); } else { d->popup()->removeEventFilter( this ); d->popup()->close(); d->poppedUp = FALSE; } } TQWidget::setEnabled( enable ); } /*! Applies the validator \a v to the combobox so that only text which is valid according to \a v is accepted. This function does nothing if the combobox is not editable. \sa validator() clearValidator() TQValidator */ void TQComboBox::setValidator( const TQValidator * v ) { if ( d && d->ed ) d->ed->setValidator( v ); } /*! Returns the validator which constrains editing for this combobox if there is one; otherwise returns 0. \sa setValidator() clearValidator() TQValidator */ const TQValidator * TQComboBox::validator() const { return d && d->ed ? d->ed->validator() : 0; } /*! This slot is equivalent to setValidator( 0 ). */ void TQComboBox::clearValidator() { if ( d && d->ed ) d->ed->setValidator( 0 ); } /*! Sets the combobox to use \a newListBox instead of the current list box or popup. As a side effect, it clears the combobox of its current contents. \warning TQComboBox assumes that newListBox->text(n) returns non-null for 0 \<= n \< newListbox->count(). This assumption is necessary because of the line edit in TQComboBox. */ void TQComboBox::setListBox( TQListBox * newListBox ) { clear(); if ( d->usingListBox() ) { delete d->listBox(); } else { delete d->popup(); d->setPopupMenu(0, FALSE); } newListBox->reparent( this, WType_Popup, TQPoint(0,0), FALSE ); d->setListBox( newListBox ); d->listBox()->setFont( font() ); d->listBox()->setPalette( palette() ); d->listBox()->setVScrollBarMode(TQScrollView::AlwaysOff); d->listBox()->setHScrollBarMode(TQScrollView::AlwaysOff); d->listBox()->setFrameStyle( TQFrame::Box | TQFrame::Plain ); d->listBox()->setLineWidth( 1 ); d->listBox()->resize( 100, 10 ); connect( d->listBox(), SIGNAL(selected(int)), SLOT(internalActivate(int)) ); connect( d->listBox(), SIGNAL(highlighted(int)), SLOT(internalHighlight(int))); } /*! Returns the current list box, or 0 if there is no list box. (TQComboBox can use TQPopupMenu instead of TQListBox.) Provided to match setListBox(). \sa setListBox() */ TQListBox * TQComboBox::listBox() const { return d && d->usingListBox() ? d->listBox() : 0; } /*! Returns the line edit, or 0 if there is no line edit. Only editable listboxes have a line editor. */ TQLineEdit* TQComboBox::lineEdit() const { return d->ed; } /*! Clears the line edit without changing the combobox's contents. Does nothing if the combobox isn't editable. This is particularly useful when using a combobox as a line edit with history. For example you can connect the combobox's activated() signal to clearEdit() in order to present the user with a new, empty line as soon as Enter is pressed. \sa setEditText() */ void TQComboBox::clearEdit() { if ( d && d->ed ) d->ed->clear(); } /*! Sets the text in the line edit to \a newText without changing the combobox's contents. Does nothing if the combobox isn't editable. This is useful e.g. for providing a good starting point for the user's editing and entering the change in the combobox only when the user presses Enter. \sa clearEdit() insertItem() */ void TQComboBox::setEditText( const TQString &newText ) { if ( d && d->ed ) { d->updateLinedGeometry(); d->ed->setText( newText ); } } void TQComboBox::setAutoCompletion( bool enable ) { d->useCompletion = enable; d->completeNow = FALSE; } bool TQComboBox::autoCompletion() const { return d->useCompletion; } /*!\reimp */ void TQComboBox::styleChange( TQStyle& s ) { d->sizeHint = TQSize(); // invalidate size hint... if ( d->ed ) d->updateLinedGeometry(); TQWidget::styleChange( s ); } bool TQComboBox::editable() const { return d->ed != 0; } void TQComboBox::setEditable( bool y ) { if ( y == editable() ) return; if ( y ) { if ( !d->usingListBox() ) setUpListBox(); setUpLineEdit(); d->ed->show(); if ( currentItem() ) setEditText( currentText() ); } else { delete d->ed; d->ed = 0; } setFocusPolicy( StrongFocus ); updateGeometry(); update(); } void TQComboBox::setUpListBox() { d->setListBox( new TQListBox( this, "in-combo", WType_Popup ) ); d->listBox()->setFont( font() ); d->listBox()->setPalette( palette() ); d->listBox()->setVScrollBarMode( TQListBox::AlwaysOff ); d->listBox()->setHScrollBarMode( TQListBox::AlwaysOff ); d->listBox()->setFrameStyle( TQFrame::Box | TQFrame::Plain ); d->listBox()->setLineWidth( 1 ); d->listBox()->resize( 100, 10 ); connect( d->listBox(), SIGNAL(selected(int)), SLOT(internalActivate(int)) ); connect( d->listBox(), SIGNAL(highlighted(int)), SLOT(internalHighlight(int))); } void TQComboBox::setUpLineEdit() { if ( !d->ed ) setLineEdit( new TQLineEdit( this, "combo edit" ) ); } /*! Sets the line edit to use \a edit instead of the current line edit. */ void TQComboBox::setLineEdit( TQLineEdit *edit ) { if ( !edit ) { #if defined(QT_CHECK_NULL) Q_ASSERT( edit != 0 ); #endif return; } edit->setText( currentText() ); delete d->ed; d->ed = edit; if ( edit->parent() != this ) edit->reparent( this, TQPoint(0,0), FALSE ); connect (edit, SIGNAL( textChanged(const TQString&) ), this, SIGNAL( textChanged(const TQString&) ) ); connect( edit, SIGNAL(returnPressed()), SLOT(returnPressed()) ); edit->setFrame( FALSE ); d->updateLinedGeometry(); edit->installEventFilter( this ); setFocusProxy( edit ); setFocusPolicy( StrongFocus ); setInputMethodEnabled( TRUE ); if ( !d->usingListBox() ) setUpListBox(); if ( isVisible() ) edit->show(); updateGeometry(); update(); } /*! \reimp */ void TQComboBox::hide() { TQWidget::hide(); if (listBox()) listBox()->hide(); else if (d->popup()) d->popup()->hide(); } #endif // QT_NO_COMBOBOX