4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
9 * \author Abdelrazak Younes
11 * Full author contact details are available in file CREDITS.
17 #if (defined(Q_WS_X11) && QT_VERSION >= 0x030200)
18 #define USE_INPUT_METHODS 1
25 #include "funcrequest.h"
26 #include "frontends/Timeout.h"
29 #include "QLPainter.h"
32 #include <QAbstractScrollArea>
33 #include <QMouseEvent>
34 #include <QWheelEvent>
35 #include <QResizeEvent>
37 #include <QPaintEvent>
40 #include <boost/scoped_ptr.hpp>
47 class QDragEnterEvent;
51 /// for emulating triple click
56 Qt::ButtonState state;
59 bool operator==(QMouseEvent const & e) {
60 return x == e.x() && y == e.y()
61 && state == e.button();
65 : x(0), y(0), state(Qt::NoButton), active(false) {}
67 double_click(QMouseEvent * e)
68 : x(e->x()), y(e->y()),
69 state(e->button()), active(true) {}
73 /** Qt only emits mouse events when the mouse is being moved, but
74 * we want to generate 'pseudo' mouse events when the mouse button is
75 * pressed and the mouse cursor is below the bottom, or above the top
76 * of the work area. In this way, we'll be able to continue scrolling
77 * (and selecting) the text.
79 * This class stores all the parameters needed to make this happen.
81 class SyntheticMouseEvent
84 SyntheticMouseEvent();
91 double scrollbar_value_old;
95 * Qt-specific implementation of the work area
98 * It consists of a content pane widget, and a scrollbar.
99 * Hopefully soon we can just use QScrollView ...
101 class QWorkArea : public QAbstractScrollArea, public WorkArea {
107 QWorkArea(LyXView & owner, int w, int h);
109 virtual ~QWorkArea();
110 /// return the width of the content pane
111 virtual int workWidth() const { return viewport()->width(); }
112 /// return the height of the content pane
113 virtual int workHeight() const { return viewport()->height(); }
115 virtual void setScrollbarParams(int height, int pos, int line_height);
117 /// a selection exists
118 virtual void haveSelection(bool) const;
120 virtual std::string const getClipboard() const;
122 virtual void putClipboard(std::string const &) const;
124 virtual void dragEnterEvent(QDragEnterEvent * event);
126 virtual void dropEvent(QDropEvent* event);
128 /// return the widget's painter
129 virtual Painter & getPainter();
131 //virtual QPaintDevice & paintDevice() { return content_->pixmap(); }
132 /// return the backing pixmap
133 QPixmap * pixmap() const { return pixmap_.get(); }
135 /// return the widget's painter
136 // virtual QLPainter & getQLPainter();
138 /// get the content pane widget
139 QWidget * getContent() const;
145 // void scrollContentsBy(int dx, int dy);
147 /// repaint part of the widget
148 void paintEvent(QPaintEvent * e);
150 /// widget has been resized
151 void resizeEvent(QResizeEvent * e);
153 /// mouse button press
154 void mousePressEvent(QMouseEvent * e);
155 /// mouse button release
156 void mouseReleaseEvent(QMouseEvent * e);
157 /// mouse double click of button
158 void mouseDoubleClickEvent(QMouseEvent * e);
160 void mouseMoveEvent(QMouseEvent * e);
162 void wheelEvent(QWheelEvent * e);
164 void keyPressEvent(QKeyEvent * e);
166 #if USE_INPUT_METHODS
168 void QWorkArea::inputMethodEvent(QInputMethodEvent * e)
173 void keyeventTimeout();
174 void adjustViewWithScrollBar(int action);
184 /// The slot connected to SyntheticMouseEvent::timeout.
185 void generateSyntheticMouseEvent();
187 SyntheticMouseEvent synthetic_mouse_event_;
189 /// the double buffered pixmap
190 boost::scoped_ptr<QPixmap> pixmap_;
193 std::queue<boost::shared_ptr<QKeyEvent> > keyeventQueue_;
195 double_click dc_event_;
197 bool scrolled_with_mouse_;
198 bool scrolled_with_keyboard_;
201 #endif // QWORKAREA_H