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/* This file is part of the KDE project
Copyright (C) 2001 Andrea Rizzi <rizzi@kde.org>
Ulrich Kuettler <ulrich.kuettler@mailbox.tu-dresden.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef KFORMULAVIEW_H
#define KFORMULAVIEW_H
#include <qevent.h>
#include <qobject.h>
#include <qrect.h>
#include "kformuladefs.h"
#include "contextstyle.h"
class QColorGroup;
KFORMULA_NAMESPACE_BEGIN
class BasicElement;
class FormulaCursor;
class FormulaElement;
class Container;
/**
* The view that shows the formula. Its main purpose is to handle
* the cursor. There are methods
* to move the cursor around. To edit the formula use the document.
*
* The view is meant to be easy embeddable into a widget or
* to be used alone if there is a bigger widget the formula
* is to be drawn into.
*/
class KOFORMULA_EXPORT View : public QObject {
Q_OBJECT
public:
View(Container*);
virtual ~View();
/**
* @returns the point inside the formula view where the cursor is.
*/
QPoint getCursorPoint() const;
/**
* Puts the widget in read only mode.
*/
void setReadOnly(bool ro);
void mousePressEvent(QMouseEvent* event);
void mouseReleaseEvent(QMouseEvent* event);
void mouseDoubleClickEvent(QMouseEvent* event);
void mouseMoveEvent(QMouseEvent* event);
void wheelEvent(QWheelEvent* event);
// the mouse event happened at a certain point
void mousePressEvent( QMouseEvent* event, const PtPoint& pos );
void mouseReleaseEvent( QMouseEvent* event, const PtPoint& pos );
void mouseDoubleClickEvent( QMouseEvent* event, const PtPoint& pos );
void mouseMoveEvent( QMouseEvent* event, const PtPoint& pos );
void wheelEvent( QWheelEvent* event, const PtPoint& pos );
// the mouse event happened at a certain point
void mousePressEvent( QMouseEvent* event, const LuPixelPoint& pos );
void mouseReleaseEvent( QMouseEvent* event, const LuPixelPoint& pos );
void mouseDoubleClickEvent( QMouseEvent* event, const LuPixelPoint& pos );
void mouseMoveEvent( QMouseEvent* event, const LuPixelPoint& pos );
void wheelEvent( QWheelEvent* event, const LuPixelPoint& pos );
void keyPressEvent(QKeyEvent* event);
virtual void focusInEvent(QFocusEvent* event);
virtual void focusOutEvent(QFocusEvent* event);
void calcCursor();
void draw(QPainter& painter, const QRect& rect, const QColorGroup& cg);
void draw(QPainter& painter, const QRect& rect);
/**
* The document we show.
*/
virtual Container* getDocument() const { return container(); }
/**
* Our cursor.
*/
FormulaCursor* getCursor() const { return cursor(); }
void setSmallCursor(bool small);
// simple cursor movement.
void moveLeft( int flag = NormalMovement );
void moveRight( int flag = NormalMovement );
void moveUp( int flag = NormalMovement );
void moveDown( int flag = NormalMovement );
void moveHome( int flag = NormalMovement );
void moveEnd( int flag = NormalMovement );
/** @returns whether the cursor is at the first position. */
bool isHome() const;
/** @returns whether the cursor is at the last position. */
bool isEnd() const;
void eraseSelection( Direction direction = beforeCursor );
void addText( QString str );
signals:
/**
* Is emitted every time the cursor might have changed.
*/
void cursorChanged(bool visible, bool selecting);
public slots:
void slotSelectAll();
protected slots:
/**
* The cursor has been moved by the container.
* We need to repaint if it was ours.
*/
void slotCursorMoved(FormulaCursor* cursor);
/**
* A new formula has been loaded.
*/
void slotFormulaLoaded(FormulaElement*);
/**
* There is an element that will disappear from the tree.
* our cursor must not be inside it.
*/
void slotElementWillVanish(BasicElement*);
/**
* Tell the cursor to change its visibility status
*/
void slotBlinkCursor();
protected:
virtual bool cursorVisible();
private:
/**
* Tell everybody that our cursor has changed if so.
*/
void emitCursorChanged();
bool& cursorHasChanged();
bool& smallCursor();
bool& activeCursor();
Container* container() const;
void startCursorTimer();
void stopCursorTimer();
const ContextStyle& contextStyle() const;
FormulaCursor* cursor() const;
struct View_Impl;
View_Impl* impl;
};
KFORMULA_NAMESPACE_END
#endif // KFORMULAVIEW_H
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