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
26 #include "QLPainter.h"
29 #include "funcrequest.h"
30 #include "frontends/Timeout.h"
32 #include <QAbstractScrollArea>
33 #include <QMouseEvent>
34 #include <QWheelEvent>
35 #include <QResizeEvent>
37 #include <QPaintEvent>
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 class QWorkArea : public QAbstractScrollArea, public WorkArea {
104 QWorkArea(LyXView & owner, int w, int h);
106 virtual ~QWorkArea();
107 /// return the width of the content pane
108 virtual int workWidth() const { return workWidth_; }
110 /// return the height of the content pane
111 virtual int workHeight() const { return workHeight_; }
113 virtual void setScrollbarParams(int height, int pos, int line_height);
115 /// a selection exists
116 virtual void haveSelection(bool) const;
119 virtual std::string const getClipboard() const;
122 virtual void putClipboard(std::string const &) const;
125 virtual void dragEnterEvent(QDragEnterEvent * event);
128 virtual void dropEvent(QDropEvent* event);
130 /// return the widget's painter
131 virtual Painter & getPainter() { return (Painter &) painter_; }
133 /// return the backing pixmap
134 QPaintDevice * paintDevice() { return &paint_device_; }
136 /// update the passed area.
137 void update(int x, int y, int w, int h);
139 /// return a screen copy of the defined area.
140 QPixmap copyScreen(int x, int y, int w, int h) const;
142 /// Draw a pixmap onto the backing pixmap.
144 QPixmap is implicitely shared so no need to pass by reference.
146 void drawScreen(int x, int y, QPixmap pixmap);
154 /// repaint part of the widget
155 void paintEvent(QPaintEvent * e);
156 /// widget has been resized
157 void resizeEvent(QResizeEvent * e);
158 /// mouse button press
159 void mousePressEvent(QMouseEvent * e);
160 /// mouse button release
161 void mouseReleaseEvent(QMouseEvent * e);
162 /// mouse double click of button
163 void mouseDoubleClickEvent(QMouseEvent * e);
165 void mouseMoveEvent(QMouseEvent * e);
167 void wheelEvent(QWheelEvent * e);
169 void keyPressEvent(QKeyEvent * e);
171 #if USE_INPUT_METHODS
174 void QWorkArea::inputMethodEvent(QInputMethodEvent * e)
179 /// Timeout event Slot for keyboard bufferring.
180 /// \todo This is not used currently in the code, remove?
181 void keyeventTimeout();
183 /// Adjust the LyX buffer view with the position of the scrollbar.
185 * The action argument is not used in the the code, it is there
186 * only for the connection to the vertical srollbar signal which
187 * emits an 'int' action.
189 void adjustViewWithScrollBar(int action = 0);
195 /// Buffer view width.
198 /// Buffer view height.
204 /// The slot connected to SyntheticMouseEvent::timeout.
205 void generateSyntheticMouseEvent();
208 SyntheticMouseEvent synthetic_mouse_event_;
210 /// Our client side painting device.
211 QImage paint_device_;
213 /// Our server side painting device.
214 QPixmap screen_device_;
220 std::queue<boost::shared_ptr<QKeyEvent> > keyeventQueue_;
222 double_click dc_event_;
225 #endif // QWORKAREA_H