4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
8 * \author Abdelrazak Younes
10 * Full author contact details are available in file CREDITS.
16 #include "frontends/WorkArea.h"
18 #include "funcrequest.h"
19 #include "frontends/Timeout.h"
21 #include <QAbstractScrollArea>
22 #include <QMouseEvent>
23 #include <QResizeEvent>
31 class QDragEnterEvent;
42 /// for emulating triple click
47 Qt::MouseButton state;
50 bool operator==(QMouseEvent const & e) {
51 return x == e.x() && y == e.y()
52 && state == e.button();
56 : x(0), y(0), state(Qt::NoButton), active(false) {}
58 double_click(QMouseEvent * e)
59 : x(e->x()), y(e->y()),
60 state(e->button()), active(true) {}
63 /** Qt only emits mouse events when the mouse is being moved, but
64 * we want to generate 'pseudo' mouse events when the mouse button is
65 * pressed and the mouse cursor is below the bottom, or above the top
66 * of the work area. In this way, we'll be able to continue scrolling
67 * (and selecting) the text.
69 * This class stores all the parameters needed to make this happen.
71 class SyntheticMouseEvent
74 SyntheticMouseEvent();
81 double scrollbar_value_old;
85 * Qt-specific implementation of the work area
88 class GuiWorkArea : public QAbstractScrollArea, public WorkArea
94 GuiWorkArea(int width, int height, LyXView & lyx_view);
96 /// return the width of the content pane
97 virtual int width() const { return viewport()->width(); }
98 /// return the height of the content pane
99 virtual int height() const { return viewport()->height(); }
101 virtual void setScrollbarParams(int height, int pos, int line_height);
103 /// update the passed area.
104 void update(int x, int y, int w, int h);
106 /// copies specified area of pixmap to screen
107 virtual void expose(int x, int y, int exp_width, int exp_height);
109 /// paint the cursor and store the background
110 virtual void showCursor(int x, int y, int h, CursorShape shape);
113 virtual void removeCursor();
116 void doGreyOut(QLPainter & pain);
118 void dragEnterEvent(QDragEnterEvent * event);
120 void dropEvent(QDropEvent* event);
121 /// repaint part of the widget
122 void paintEvent(QPaintEvent * e);
123 /// widget has been resized
124 void resizeEvent(QResizeEvent * e);
125 /// mouse button press
126 void mousePressEvent(QMouseEvent * e);
127 /// mouse button release
128 void mouseReleaseEvent(QMouseEvent * e);
129 /// mouse double click of button
130 void mouseDoubleClickEvent(QMouseEvent * e);
132 void mouseMoveEvent(QMouseEvent * e);
134 void wheelEvent(QWheelEvent * e);
136 void keyPressEvent(QKeyEvent * e);
138 void inputMethodEvent(QInputMethodEvent * e);
142 /// Timeout event Slot for keyboard bufferring.
143 /// \todo This is not used currently in the code, remove?
144 void keyeventTimeout();
146 /// Adjust the LyX buffer view with the position of the scrollbar.
148 * The action argument is not used in the the code, it is there
149 * only for the connection to the vertical srollbar signal which
150 * emits an 'int' action.
152 void adjustViewWithScrollBar(int action = 0);
155 /// The slot connected to SyntheticMouseEvent::timeout.
156 void generateSyntheticMouseEvent();
159 SyntheticMouseEvent synthetic_mouse_event_;
161 /// Our client side painting device.
162 //QPixmap paint_device_;
168 std::queue<boost::shared_ptr<QKeyEvent> > keyeventQueue_;
170 double_click dc_event_;
191 QColor cursor_color_;
193 CursorShape cursor_shape_;
196 } // namespace frontend