lyx_mirror/src/lyxscreen.h
Jean-Marc Lasgouttes c897a93ed7 cleanups from Andre
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@3075 a592a061-630c-0410-9148-cb99ea01b6c8
2001-11-26 11:08:43 +00:00

127 lines
3.0 KiB
C++

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