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 "support/Timeout.h"
21 #include <QAbstractScrollArea>
22 #include <QMouseEvent>
24 #include <QResizeEvent>
29 class QDragEnterEvent;
47 /// types of cursor in work area
51 /// L-shape for locked insets of a different language
53 /// reverse L-shape for RTL text
57 /// for emulating triple click
61 DoubleClick() : state(Qt::NoButton), active(false) {}
63 DoubleClick(QMouseEvent * e) : state(e->button()), active(true) {}
65 bool operator==(QMouseEvent const & e) { return state == e.button(); }
69 Qt::MouseButton state;
74 /** Qt only emits mouse events when the mouse is being moved, but
75 * we want to generate 'pseudo' mouse events when the mouse button is
76 * pressed and the mouse cursor is below the bottom, or above the top
77 * of the work area. In this way, we'll be able to continue scrolling
78 * (and selecting) the text.
80 * This class stores all the parameters needed to make this happen.
82 class SyntheticMouseEvent
85 SyntheticMouseEvent();
92 double scrollbar_value_old;
97 * Implementation of the work area (buffer view GUI)
101 class GuiWorkArea : public QAbstractScrollArea, public WorkArea
107 GuiWorkArea(Buffer & buffer, GuiView & lv);
112 void scheduleRedraw() { schedule_redraw_ = true; }
114 BufferView & bufferView();
116 BufferView const & bufferView() const;
120 void stopBlinkingCursor();
122 void startBlinkingCursor();
123 /// Process Key pressed event.
124 /// This needs to be public because it is accessed externally by GuiView.
125 void processKeySym(KeySymbol const & key, KeyModifier mod);
127 void resizeBufferView();
131 void titleChanged(GuiWorkArea *);
134 /// Adjust the LyX buffer view with the position of the scrollbar.
136 * The action argument is not used in the the code, it is there
137 * only for the connection to the vertical srollbar signal which
138 * emits an 'int' action.
140 void adjustViewWithScrollBar(int action = 0);
141 /// timer to limit triple clicks
142 void doubleClickTimeout();
143 /// toggle the cursor's visibility
146 /// close this work area.
147 /// Slot for Buffer::closing signal.
151 /// update the passed area.
152 void update(int x, int y, int w, int h);
156 /// paint the cursor and store the background
157 virtual void showCursor(int x, int y, int h, CursorShape shape);
160 virtual void removeCursor();
162 /// This function is called when the buffer readonly status change.
163 void setReadOnly(bool);
165 /// Update window titles of all users.
166 void updateWindowTitle();
168 bool event(QEvent *);
170 void focusInEvent(QFocusEvent *);
172 void focusOutEvent(QFocusEvent *);
173 /// repaint part of the widget
174 void paintEvent(QPaintEvent * ev);
175 /// widget has been resized
176 void resizeEvent(QResizeEvent * ev);
177 /// mouse button press
178 void mousePressEvent(QMouseEvent * ev);
179 /// mouse button release
180 void mouseReleaseEvent(QMouseEvent * ev);
181 /// mouse double click of button
182 void mouseDoubleClickEvent(QMouseEvent * ev);
184 void mouseMoveEvent(QMouseEvent * ev);
186 void wheelEvent(QWheelEvent * ev);
188 void keyPressEvent(QKeyEvent * ev);
190 void inputMethodEvent(QInputMethodEvent * ev);
192 QVariant inputMethodQuery(Qt::InputMethodQuery query) const;
194 /// The slot connected to SyntheticMouseEvent::timeout.
195 void generateSyntheticMouseEvent();
197 void dispatch(FuncRequest const & cmd0, KeyModifier = NoModifier);
198 /// hide the visible cursor, if it is visible
200 /// show the cursor if it is not visible
203 void updateScrollbar();
206 BufferView * buffer_view_;
209 /// is the cursor currently displayed
210 bool cursor_visible_;
213 QTimer cursor_timeout_;
215 SyntheticMouseEvent synthetic_mouse_event_;
217 DoubleClick dc_event_;
220 CursorWidget * cursor_;
226 bool schedule_redraw_;
232 /// A tabbed set of GuiWorkAreas.
233 class TabWorkArea : public QTabWidget
237 TabWorkArea(QWidget * parent = 0);
239 void showBar(bool show);
241 bool setCurrentWorkArea(GuiWorkArea *);
242 GuiWorkArea * addWorkArea(Buffer & buffer, GuiView & view);
243 bool removeWorkArea(GuiWorkArea *);
244 GuiWorkArea * currentWorkArea();
245 GuiWorkArea * workArea(Buffer & buffer);
249 void currentWorkAreaChanged(GuiWorkArea *);
253 void on_currentTabChanged(int index);
255 void closeCurrentTab();
257 void updateTabText(GuiWorkArea *);
260 } // namespace frontend