gtkstyle.c

gtk是linux一款强大的夸平台的图形化开发工具

  gint parent_relative;
  
  g_return_if_fail (style != NULL);
  g_return_if_fail (window != NULL);
  
  if (style->engine && style->engine->set_background)
    {
      style->engine->set_background (style, window, state_type);
      
      return;
    }
  
  if (style->bg_pixmap[state_type])
    {
      if (style->bg_pixmap[state_type] == (GdkPixmap*) GDK_PARENT_RELATIVE)
        {
          pixmap = NULL;
          parent_relative = TRUE;
        }
      else
        {
          pixmap = style->bg_pixmap[state_type];
          parent_relative = FALSE;
        }
      
      gdk_window_set_back_pixmap (window, pixmap, parent_relative);
    }
  else
    gdk_window_set_background (window, &style->bg[state_type]);
}


/* Default functions */
void
gtk_style_apply_default_background (GtkStyle     *style,
                                    GdkWindow    *window,
                                    gboolean      set_bg,
                                    GtkStateType  state_type, 
                                    GdkRectangle *area, 
                                    gint          x, 
                                    gint          y, 
                                    gint          width, 
                                    gint          height)
{
  GdkRectangle new_rect, old_rect;
  
  if (area)
    {
      old_rect.x = x;
      old_rect.y = y;
      old_rect.width = width;
      old_rect.height = height;
      
      if (!gdk_rectangle_intersect (area, &old_rect, &new_rect))
        return;
    }
  else
    {
      new_rect.x = x;
      new_rect.y = y;
      new_rect.width = width;
      new_rect.height = height;
    }
  
  if (!style->bg_pixmap[state_type] ||
      gdk_window_get_type (window) == GDK_WINDOW_PIXMAP ||
      (!set_bg && style->bg_pixmap[state_type] != (GdkPixmap*) GDK_PARENT_RELATIVE))
    {
      GdkGC *gc = style->bg_gc[state_type];
      
      if (style->bg_pixmap[state_type])
        {
          gdk_gc_set_fill (gc, GDK_TILED);
          gdk_gc_set_tile (gc, style->bg_pixmap[state_type]);
        }
      
      gdk_draw_rectangle (window, gc, TRUE, 
                          new_rect.x, new_rect.y, new_rect.width, new_rect.height);
      if (style->bg_pixmap[state_type])
        gdk_gc_set_fill (gc, GDK_SOLID);
    }
  else
    {
      if (set_bg)
        {
          if (style->bg_pixmap[state_type] == (GdkPixmap*) GDK_PARENT_RELATIVE)
            gdk_window_set_back_pixmap (window, NULL, TRUE);
          else
            gdk_window_set_back_pixmap (window, style->bg_pixmap[state_type], FALSE);
        }
      
      gdk_window_clear_area (window, 
                             new_rect.x, new_rect.y, 
                             new_rect.width, new_rect.height);
    }
}

static void
gtk_default_draw_hline (GtkStyle     *style,
                        GdkWindow    *window,
                        GtkStateType  state_type,
                        GdkRectangle  *area,
                        GtkWidget     *widget,
                        gchar         *detail,
                        gint          x1,
                        gint          x2,
                        gint          y)
{
  gint thickness_light;
  gint thickness_dark;
  gint i;
  
  g_return_if_fail (style != NULL);
  g_return_if_fail (window != NULL);
  
  thickness_light = style->klass->ythickness / 2;
  thickness_dark = style->klass->ythickness - thickness_light;
  
  if (area)
    {
      gdk_gc_set_clip_rectangle (style->light_gc[state_type], area);
      gdk_gc_set_clip_rectangle (style->dark_gc[state_type], area);
    }
  
  if (detail && !strcmp (detail, "label"))
    {
      if (state_type == GTK_STATE_INSENSITIVE)
        gdk_draw_line (window, style->white_gc, x1 + 1, y + 1, x2 + 1, y + 1);   
      gdk_draw_line (window, style->fg_gc[state_type], x1, y, x2, y);     
    }
  else
    {
      for (i = 0; i < thickness_dark; i++)
        {
          gdk_draw_line (window, style->light_gc[state_type], x2 - i - 1, y + i, x2, y + i);
          gdk_draw_line (window, style->dark_gc[state_type], x1, y + i, x2 - i - 1, y + i);
        }
      
      y += thickness_dark;
      for (i = 0; i < thickness_light; i++)
        {
          gdk_draw_line (window, style->dark_gc[state_type], x1, y + i, x1 + thickness_light - i - 1, y + i);
          gdk_draw_line (window, style->light_gc[state_type], x1 + thickness_light - i - 1, y + i, x2, y + i);
        }
    }
  
  if (area)
    {
      gdk_gc_set_clip_rectangle (style->light_gc[state_type], NULL);
      gdk_gc_set_clip_rectangle (style->dark_gc[state_type], NULL);
    }
}


static void
gtk_default_draw_vline (GtkStyle     *style,
                        GdkWindow    *window,
                        GtkStateType  state_type,
                        GdkRectangle  *area,
                        GtkWidget     *widget,
                        gchar         *detail,
                        gint          y1,
                        gint          y2,
                        gint          x)
{
  gint thickness_light;
  gint thickness_dark;
  gint i;
  
  g_return_if_fail (style != NULL);
  g_return_if_fail (window != NULL);
  
  thickness_light = style->klass->xthickness / 2;
  thickness_dark = style->klass->xthickness - thickness_light;
  
  if (area)
    {
      gdk_gc_set_clip_rectangle (style->light_gc[state_type], area);
      gdk_gc_set_clip_rectangle (style->dark_gc[state_type], area);
    }
  for (i = 0; i < thickness_dark; i++)
    {
      gdk_draw_line (window, style->light_gc[state_type], x + i, y2 - i - 1, x + i, y2);
      gdk_draw_line (window, style->dark_gc[state_type], x + i, y1, x + i, y2 - i - 1);
    }
  
  x += thickness_dark;
  for (i = 0; i < thickness_light; i++)
    {
      gdk_draw_line (window, style->dark_gc[state_type], x + i, y1, x + i, y1 + thickness_light - i);
      gdk_draw_line (window, style->light_gc[state_type], x + i, y1 + thickness_light - i, x + i, y2);
    }
  if (area)
    {
      gdk_gc_set_clip_rectangle (style->light_gc[state_type], NULL);
      gdk_gc_set_clip_rectangle (style->dark_gc[state_type], NULL);
    }
}


static void
gtk_default_draw_shadow (GtkStyle      *style,
                         GdkWindow     *window,
                         GtkStateType   state_type,
                         GtkShadowType  shadow_type,
                         GdkRectangle  *area,
                         GtkWidget     *widget,
                         gchar         *detail,
                         gint           x,
                         gint           y,
                         gint           width,
                         gint           height)
{
  GdkGC *gc1 = NULL;
  GdkGC *gc2 = NULL;
  gint thickness_light;
  gint thickness_dark;
  gint i;
  
  g_return_if_fail (style != NULL);
  g_return_if_fail (window != NULL);
  
  if ((width == -1) && (height == -1))
    gdk_window_get_size (window, &width, &height);
  else if (width == -1)
    gdk_window_get_size (window, &width, NULL);
  else if (height == -1)
    gdk_window_get_size (window, NULL, &height);
  
  switch (shadow_type)
    {
    case GTK_SHADOW_NONE:
      return;
    case GTK_SHADOW_IN:
    case GTK_SHADOW_ETCHED_IN:
      gc1 = style->light_gc[state_type];
      gc2 = style->dark_gc[state_type];
      break;
    case GTK_SHADOW_OUT:
    case GTK_SHADOW_ETCHED_OUT:
      gc1 = style->dark_gc[state_type];
      gc2 = style->light_gc[state_type];
      break;
    }
  
  if (area)
    {
      gdk_gc_set_clip_rectangle (gc1, area);
      gdk_gc_set_clip_rectangle (gc2, area);
      if (shadow_type == GTK_SHADOW_IN || 
          shadow_type == GTK_SHADOW_OUT)
        {
          gdk_gc_set_clip_rectangle (style->black_gc, area);
          gdk_gc_set_clip_rectangle (style->bg_gc[state_type], area);
        }
    }
  
  switch (shadow_type)
    {
    case GTK_SHADOW_NONE:
      break;
      
    case GTK_SHADOW_IN:
      gdk_draw_line (window, gc1,
                     x, y + height - 1, x + width - 1, y + height - 1);
      gdk_draw_line (window, gc1,
                     x + width - 1, y, x + width - 1, y + height - 1);
      
      gdk_draw_line (window, style->bg_gc[state_type],
                     x + 1, y + height - 2, x + width - 2, y + height - 2);
      gdk_draw_line (window, style->bg_gc[state_type],
                     x + width - 2, y + 1, x + width - 2, y + height - 2);
      
      gdk_draw_line (window, style->black_gc,
                     x + 1, y + 1, x + width - 2, y + 1);
      gdk_draw_line (window, style->black_gc,
                     x + 1, y + 1, x + 1, y + height - 2);
      
      gdk_draw_line (window, gc2,
                     x, y, x + width - 1, y);
      gdk_draw_line (window, gc2,
                     x, y, x, y + height - 1);
      break;
      
    case GTK_SHADOW_OUT:
      gdk_draw_line (window, gc1,
                     x + 1, y + height - 2, x + width - 2, y + height - 2);
      gdk_draw_line (window, gc1,
                     x + width - 2, y + 1, x + width - 2, y + height - 2);
      
      gdk_draw_line (window, gc2,
                     x, y, x + width - 1, y);
      gdk_draw_line (window, gc2,
                     x, y, x, y + height - 1);
      
      gdk_draw_line (window, style->bg_gc[state_type],
                     x + 1, y + 1, x + width - 2, y + 1);
      gdk_draw_line (window, style->bg_gc[state_type],
                     x + 1, y + 1, x + 1, y + height - 2);
      
      gdk_draw_line (window, style->black_gc,
                     x, y + height - 1, x + width - 1, y + height - 1);
      gdk_draw_line (window, style->black_gc,
                     x + width - 1, y, x + width - 1, y + height - 1);
      break;
      
    case GTK_SHADOW_ETCHED_IN:
    case GTK_SHADOW_ETCHED_OUT:
      thickness_light = 1;
      thickness_dark = 1;
      
      for (i = 0; i < thickness_dark; i++)
        {
          gdk_draw_line (window, gc1,
                         x + i,
                         y + height - i - 1,
                         x + width - i - 1,
                         y + height - i - 1);
          gdk_draw_line (window, gc1,
                         x + width - i - 1,
                         y + i,
                         x + width - i - 1,
                         y + height - i - 1);
          
          gdk_draw_line (window, gc2,
                         x + i,
                         y + i,
                         x + width - i - 2,
                         y + i);
          gdk_draw_line (window, gc2,
                         x + i,
                         y + i,
                         x + i,
                         y + height - i - 2);
        }
      
      for (i = 0; i < thickness_light; i++)
        {
          gdk_draw_line (window, gc1,
                         x + thickness_dark + i,
                         y + thickness_dark + i,
                         x + width - thickness_dark - i - 1,
                         y + thickness_dark + i);
          gdk_draw_line (window, gc1,
                         x + thickness_dark + i,
                         y + thickness_dark + i,
                         x + thickness_dark + i,
                         y + height - thickness_dark - i - 1);
          
          gdk_draw_line (window, gc2,
                         x + thickness_dark + i,
                         y + height - thickness_light - i - 1,
                         x + width - thickness_light - 1,
                         y + height - thickness_light - i - 1);
          gdk_draw_line (window, gc2,
                         x + width - thickness_light - i - 1,
                         y + thickness_dark + i,
                         x + width - thickness_light - i - 1,
                         y + height - thickness_light - 1);
        }
      break;
    }
  if (area)
    {
      gdk_gc_set_clip_rectangle (gc1, NULL);
      gdk_gc_set_clip_rectangle (gc2, NULL);
      if (shadow_type == GTK_SHADOW_IN || 
          shadow_type == GTK_SHADOW_OUT)
        {
          gdk_gc_set_clip_rectangle (style->black_gc, NULL);
          gdk_gc_set_clip_rectangle (style->bg_gc[state_type], NULL);
        }
    }
}