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.
14 #ifndef BASE_WORKAREA_H
15 #define BASE_WORKAREA_H
17 #include "frontends/key_state.h"
18 #include "frontends/KeySymbol.h"
20 #include "support/Timeout.h"
21 #include "support/docstring.h"
23 #include <boost/signals/trackable.hpp>
37 /// types of cursor in work area
41 /// L-shape for locked insets of a different language
43 /// reverse L-shape for RTL text
48 * The work area class represents the widget that provides the
49 * view onto a document. It is owned by the BufferView, and
50 * is responsible for handing events back to its owning BufferView.
51 * It works in concert with the BaseScreen class to update the
52 * widget view of a document.
54 class WorkArea : public boost::signals::trackable {
56 WorkArea(int id, LyXView & lyx_view);
58 virtual ~WorkArea() {}
60 int const id() const { return id_; }
62 void setBufferView(BufferView * buffer_view);
65 BufferView & bufferView();
67 BufferView const & bufferView() const;
69 /// \return true if has the keyboard input focus.
70 virtual bool hasFocus() const = 0;
72 /// return the width of the work area in pixels
73 virtual int width() const = 0;
75 /// return the height of the work area in pixels
76 virtual int height() const = 0;
79 * Update the scrollbar.
80 * @param height the total document height in pixels
81 * @param pos the current position in the document, in pixels
82 * @param line_height the line-scroll amount, in pixels
84 virtual void setScrollbarParams(int height, int pos, int line_height) = 0;
87 virtual void scheduleRedraw() = 0;
89 /// redraw the screen, without using existing pixmap
90 virtual void redraw();
92 void stopBlinkingCursor();
93 void startBlinkingCursor();
95 /// Process Key pressed event.
96 /// This needs to be public because it is accessed externally by GuiView.
97 void processKeySym(KeySymbolPtr key, key_modifier::state state);
99 /// cause the display of the given area of the work area
100 virtual void expose(int x, int y, int w, int h) = 0;
102 void dispatch(FuncRequest const & cmd0,
103 key_modifier::state = key_modifier::none);
105 void resizeBufferView();
107 void scrollBufferView(int position);
108 /// hide the visible cursor, if it is visible
110 /// show the cursor if it is not visible
112 /// toggle the cursor's visibility
115 virtual void removeCursor() = 0;
116 /// paint the cursor and store the background
117 virtual void showCursor(int x, int y, int h, CursorShape shape) = 0;
119 void updateScrollbar();
122 BufferView * buffer_view_;
133 void displayMessage(docstring const &);
134 /// buffer messages signal connection
135 boost::signals::connection message_connection_;
137 /// is the cursor currently displayed
138 bool cursor_visible_;
141 Timeout cursor_timeout_;
144 } // namespace frontend
147 #endif // BASE_WORKAREA_H