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git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3075 a592a061-630c-0410-9148-cb99ea01b6c8
127 lines
3.0 KiB
C++
127 lines
3.0 KiB
C++
// -*- C++ -*-
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/* This file is part of
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* ======================================================
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*
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* LyX, The Document Processor
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*
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* Copyright 1995 Matthias Ettrich
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* Copyright 1995-2001 The LyX Team
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*
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* ====================================================== */
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#ifndef LYXSCREEN_H
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#define LYXSCREEN_H
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#ifdef __GNUG__
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#pragma interface
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#endif
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#include <X11/Xlib.h>
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class LyXText;
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class WorkArea;
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class Buffer;
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class BufferView;
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struct Row;
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/** The class LyXScreen is used for the main Textbody.
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Concretely, the screen is held in a pixmap. This pixmap is kept up to
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date and used to optimize drawing on the screen.
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This class also handles the drawing of the cursor and partly the selection.
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*/
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class LyXScreen {
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public:
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///
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enum Cursor_Shape {
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///
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BAR_SHAPE,
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///
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L_SHAPE,
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///
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REVERSED_L_SHAPE
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};
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///
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LyXScreen(WorkArea &);
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///
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~LyXScreen();
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/// Sets the cursor color to LColor::cursor.
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void setCursorColor();
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/** Draws the screen form textposition y. Uses as much of
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the already printed pixmap as possible */
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void draw(LyXText *, BufferView *, unsigned int y);
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/// Redraws the screen, without using existing pixmap
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void redraw(LyXText *, BufferView *);
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/// Returns a new top so that the cursor is visible
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unsigned int topCursorVisible(LyXText const *);
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/// Redraws the screen such that the cursor is visible
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bool fitCursor(LyXText *, BufferView *);
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///
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void showCursor(LyXText const *, BufferView const *);
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///
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void hideCursor();
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///
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void cursorToggle(BufferView *) const;
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///
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void showManualCursor(LyXText const *, int x, int y,
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int asc, int desc,
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Cursor_Shape shape);
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/// returns 1 if first has changed, otherwise 0
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bool fitManualCursor(LyXText *, BufferView *, int, int, int, int);
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///
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void toggleSelection(LyXText *, BufferView *, bool = true,
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int y_offset = 0, int x_offset = 0);
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///
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void toggleToggle(LyXText *, BufferView *,
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int y_offset = 0, int x_offset = 0);
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/** Updates part of the screen. If text->status is
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LyXText::NEED_MORE_REFRESH, we update from the
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point of change and to the end of the screen.
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If text->status is LyXText::NEED_VERY_LITTLE_REFRESH,
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we only update the current row. */
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void update(LyXText *, BufferView *, int y_offset=0, int x_offset=0);
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///
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bool forceClear() const { return force_clear; }
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///
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bool cursor_visible;
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private:
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/// Copies specified area of pixmap to screen
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void expose(int x, int y, int exp_width, int exp_height);
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/// y1 and y2 are coordinates of the screen
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void drawFromTo(LyXText *, BufferView *, int y1, int y2,
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int y_offset = 0, int x_offset = 0, bool internal=false);
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/// y is a coordinate of the text
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void drawOneRow(LyXText *, BufferView *, Row * row,
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int y_text, int y_offset = 0, int x_offset = 0);
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///
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WorkArea & owner;
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///
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Pixmap cursor_pixmap;
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///
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int cursor_pixmap_x;
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///
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int cursor_pixmap_y;
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///
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int cursor_pixmap_w;
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///
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int cursor_pixmap_h;
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///
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GC gc_copy;
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///
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bool force_clear;
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};
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#endif
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