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[lttv.git] / ltt / branches / poly / lttv / modules / gui / controlflow / drawing.h

/* This file is part of the Linux Trace Toolkit viewer
 * Copyright (C) 2003-2004 Mathieu Desnoyers
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License Version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, 
 * MA 02111-1307, USA.
 */


#ifndef _DRAWING_H
#define _DRAWING_H

#include <glib.h>
#include <gdk/gdk.h>
#include <gtk/gtk.h>
#include <ltt/ltt.h>
#include "cfv.h"
#include "drawitem.h"


#define SAFETY 50 // safety pixels at right and bottom of pixmap buffer

/* This part of the viewer does :
 * Draw horizontal lines, getting graphic context as arg.
 * Copy region of the screen into another.
 * Modify the boundaries to reflect a scale change. (resize)
 * Refresh the physical screen with the pixmap
 * A helper function is provided here to convert from time to process
 * identifier to pixels and the contrary (will be useful for mouse selection).
 * Insert an empty square in the drawing, moving the bottom part.
 *
 * Note: The last point is exactly why it would not be so easy to add the
 * vertical line functionnality as in the original version of LTT. In order
 * to do so, we should keep all processes in the list for the duration of
 * all the trace instead of dynamically adding and removing them when we
 * scroll. Another possibility is to redraw all the visible area when a new
 * process is added to the list. The second solution seems more appropriate
 * to me.
 * 
 *
 * The pixmap used has the width of the physical window, but the height
 * of the shown processes.
 */

typedef struct _Drawing_t Drawing_t;

struct _Drawing_t {
  GtkWidget *vbox;
  GtkWidget *drawing_area;
  GtkWidget *ruler;
  GdkPixmap *pixmap;
  ControlFlowData *control_flow_data;
  
  PangoLayout *pango_layout;

  gint    height, width, depth;
  
};

Drawing_t *drawing_construct(ControlFlowData *control_flow_data);
void drawing_destroy(Drawing_t *drawing);

GtkWidget *drawing_get_widget(Drawing_t *drawing);
GtkWidget *drawing_get_drawing_area(Drawing_t *drawing);

//void drawing_Refresh (  Drawing_t *drawing,
//      guint x, guint y,
//      guint width, guint height);

void drawing_draw_line( Drawing_t *drawing,
      GdkPixmap *pixmap,
      guint x1, guint y1,
      guint x2, guint y2,
      GdkGC *GC);

//void drawing_copy( Drawing_t *drawing,
//    guint xsrc, guint ysrc,
//    guint xdest, guint ydest,
//    guint width, guint height);

/* Insert a square corresponding to a new process in the list */
void drawing_insert_square(Drawing_t *drawing,
        guint y,
        guint height);

/* Remove a square corresponding to a removed process in the list */
void drawing_remove_square(Drawing_t *drawing,
        guint y,
        guint height);


//void drawing_Resize(Drawing_t *drawing, guint h, guint w);

void convert_pixels_to_time(
    gint width,
    guint x,
    LttTime window_time_begin,
    LttTime window_time_end,
    LttTime *time);

void convert_time_to_pixels(
    LttTime window_time_begin,
    LttTime window_time_end,
    LttTime time,
    gint width,
    guint *x);

void drawing_update_ruler(Drawing_t *drawing, TimeWindow *time_window);

#endif // _DRAWING_H