gtktreeitem.c

gtk是linux一款强大的夸平台的图形化开发工具

  g_return_if_fail (tree_item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  gtk_signal_emit (GTK_OBJECT (tree_item), tree_item_signals[COLLAPSE_TREE], NULL);
}

static void
gtk_tree_item_add_pixmaps (GtkTreeItem *tree_item)
{
  GList *tmp_list;
  GdkColormap *colormap;
  GtkTreePixmaps *pixmap_node = NULL;

  g_return_if_fail (tree_item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  if (tree_item->pixmaps)
    return;

  colormap = gtk_widget_get_colormap (GTK_WIDGET (tree_item));

  tmp_list = pixmaps;
  while (tmp_list)
    {
      pixmap_node = (GtkTreePixmaps *)tmp_list->data;

      if (pixmap_node->colormap == colormap)
	break;
      
      tmp_list = tmp_list->next;
    }

  if (tmp_list)
    {
      pixmap_node->refcount++;
      tree_item->pixmaps = tmp_list;
    }
  else
    {
      pixmap_node = g_new (GtkTreePixmaps, 1);

      pixmap_node->colormap = colormap;
      gdk_colormap_ref (colormap);

      pixmap_node->refcount = 1;

      /* create pixmaps for plus icon */
      pixmap_node->pixmap_plus = 
	gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
				      &pixmap_node->mask_plus,
				      NULL,
				      tree_plus);
      
      /* create pixmaps for minus icon */
      pixmap_node->pixmap_minus = 
	gdk_pixmap_create_from_xpm_d (GTK_WIDGET (tree_item)->window,
				      &pixmap_node->mask_minus,
				      NULL,
				      tree_minus);

      tree_item->pixmaps = pixmaps = g_list_prepend (pixmaps, pixmap_node);
    }
  
  gtk_pixmap_set (GTK_PIXMAP (tree_item->plus_pix_widget), 
		  pixmap_node->pixmap_plus, pixmap_node->mask_plus);
  gtk_pixmap_set (GTK_PIXMAP (tree_item->minus_pix_widget), 
		  pixmap_node->pixmap_minus, pixmap_node->mask_minus);
}

static void
gtk_tree_item_remove_pixmaps (GtkTreeItem *tree_item)
{
  g_return_if_fail (tree_item != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (tree_item));

  if (tree_item->pixmaps)
    {
      GtkTreePixmaps *pixmap_node = (GtkTreePixmaps *)tree_item->pixmaps->data;
      
      g_assert (pixmap_node->refcount > 0);
      
      if (--pixmap_node->refcount == 0)
	{
	  gdk_colormap_unref (pixmap_node->colormap);
	  gdk_pixmap_unref (pixmap_node->pixmap_plus);
	  gdk_bitmap_unref (pixmap_node->mask_plus);
	  gdk_pixmap_unref (pixmap_node->pixmap_minus);
	  gdk_bitmap_unref (pixmap_node->mask_minus);
	  
	  pixmaps = g_list_remove_link (pixmaps, tree_item->pixmaps);
	  g_list_free_1 (tree_item->pixmaps);
	  g_free (pixmap_node);
	}

      tree_item->pixmaps = NULL;
    }
}

static void
gtk_tree_item_realize (GtkWidget *widget)
{    
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (widget));

  if (GTK_WIDGET_CLASS (parent_class)->realize)
    (* GTK_WIDGET_CLASS (parent_class)->realize) (widget);
  
  gdk_window_set_background (widget->window, 
			     &widget->style->base[GTK_STATE_NORMAL]);

  gtk_tree_item_add_pixmaps (GTK_TREE_ITEM (widget));
}

static void
gtk_tree_item_size_request (GtkWidget      *widget,
			    GtkRequisition *requisition)
{
  GtkBin *bin;
  GtkTreeItem* item;
  GtkRequisition child_requisition;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (widget));
  g_return_if_fail (requisition != NULL);

  bin = GTK_BIN (widget);
  item = GTK_TREE_ITEM(widget);

  requisition->width = (GTK_CONTAINER (widget)->border_width +
			widget->style->klass->xthickness) * 2;
  requisition->height = GTK_CONTAINER (widget)->border_width * 2;

  if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
    {
      GtkRequisition pix_requisition;
      
      gtk_widget_size_request (bin->child, &child_requisition);

      requisition->width += child_requisition.width;

      gtk_widget_size_request (item->pixmaps_box, 
			       &pix_requisition);
      requisition->width += pix_requisition.width + DEFAULT_DELTA + 
	GTK_TREE (widget->parent)->current_indent;

      requisition->height += MAX (child_requisition.height,
				  pix_requisition.height);
    }
}

static void
gtk_tree_item_size_allocate (GtkWidget     *widget,
			     GtkAllocation *allocation)
{
  GtkBin *bin;
  GtkTreeItem* item;
  GtkAllocation child_allocation;
  guint border_width;
  int temp;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (widget));
  g_return_if_fail (allocation != NULL);

  widget->allocation = *allocation;
  if (GTK_WIDGET_REALIZED (widget))
    gdk_window_move_resize (widget->window,
			    allocation->x, allocation->y,
			    allocation->width, allocation->height);

  bin = GTK_BIN (widget);
  item = GTK_TREE_ITEM(widget);

  if (bin->child)
    {
      border_width = (GTK_CONTAINER (widget)->border_width +
		      widget->style->klass->xthickness);

      child_allocation.x = border_width + GTK_TREE(widget->parent)->current_indent;
      child_allocation.y = GTK_CONTAINER (widget)->border_width;

      child_allocation.width = item->pixmaps_box->requisition.width;
      child_allocation.height = item->pixmaps_box->requisition.height;
      
      temp = allocation->height - child_allocation.height;
      child_allocation.y += ( temp / 2 ) + ( temp % 2 );

      gtk_widget_size_allocate (item->pixmaps_box, &child_allocation);

      child_allocation.y = GTK_CONTAINER (widget)->border_width;
      child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
      child_allocation.x += item->pixmaps_box->requisition.width+DEFAULT_DELTA;

      child_allocation.width = 
	MAX (1, (gint)allocation->width - ((gint)child_allocation.x + border_width));

      gtk_widget_size_allocate (bin->child, &child_allocation);
    }
}

static void 
gtk_tree_item_draw_lines (GtkWidget *widget) 
{
  GtkTreeItem* item;
  GtkTree* tree;
  guint lx1, ly1, lx2, ly2;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (widget));

  item = GTK_TREE_ITEM(widget);
  tree = GTK_TREE(widget->parent);

  if (!tree->view_line)
    return;

  /* draw vertical line */
  lx1 = item->pixmaps_box->allocation.width;
  lx1 = lx2 = ((lx1 / 2) + (lx1 % 2) + 
	       GTK_CONTAINER (widget)->border_width + 1 + tree->current_indent);
  ly1 = 0;
  ly2 = widget->allocation.height;

  if (g_list_last (tree->children)->data == widget)
    ly2 = (ly2 / 2) + (ly2 % 2);

  if (tree != tree->root_tree)
    gdk_draw_line (widget->window, widget->style->black_gc, lx1, ly1, lx2, ly2);

  /* draw vertical line for subtree connecting */
  if(g_list_last(tree->children)->data != (gpointer)widget)
    ly2 = (ly2 / 2) + (ly2 % 2);
  
  lx2 += DEFAULT_DELTA;

  if (item->subtree && item->expanded)
    gdk_draw_line (widget->window, widget->style->black_gc,
		   lx2, ly2, lx2, widget->allocation.height);

  /* draw horizontal line */
  ly1 = ly2;
  lx2 += 2;

  gdk_draw_line (widget->window, widget->style->black_gc,
		 lx1, ly1, lx2, ly2);

  lx2 -= DEFAULT_DELTA+2;
  ly1 = 0;
  ly2 = widget->allocation.height;

  if (tree != tree->root_tree)
    {
      item = GTK_TREE_ITEM (tree->tree_owner);
      tree = GTK_TREE (GTK_WIDGET (tree)->parent);
      while (tree != tree->root_tree)
	{
	  lx1 = lx2 -= tree->indent_value;
	  
	  if (g_list_last (tree->children)->data != item)
	    gdk_draw_line (widget->window, widget->style->black_gc, lx1, ly1, lx2, ly2);
	  item = GTK_TREE_ITEM (tree->tree_owner);
	  tree = GTK_TREE (GTK_WIDGET (tree)->parent);
	} 
    }
}

static void
gtk_tree_item_paint (GtkWidget    *widget,
		     GdkRectangle *area)
{
  GtkBin *bin;
  GdkRectangle child_area, item_area;
  GtkTreeItem* tree_item;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (widget));
  g_return_if_fail (area != NULL);

  /* FIXME: We should honor tree->view_mode, here - I think
   * the desired effect is that when the mode is VIEW_ITEM,
   * only the subitem is drawn as selected, not the entire
   * line. (Like the way that the tree in Windows Explorer
   * works).
   */
  if (GTK_WIDGET_DRAWABLE (widget))
    {
      bin = GTK_BIN (widget);
      tree_item = GTK_TREE_ITEM(widget);

      if (widget->state == GTK_STATE_NORMAL)
	{
	  gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
	  gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
	}
      else 
	{
	  if (!GTK_WIDGET_IS_SENSITIVE (widget)) 
	    gtk_paint_flat_box(widget->style, widget->window,
			       widget->state, GTK_STATE_INSENSITIVE,
			       area, widget, "treeitem",
			       0, 0, -1, -1);
	  else
	    gtk_paint_flat_box(widget->style, widget->window,
			       widget->state, GTK_SHADOW_ETCHED_OUT,
			       area, widget, "treeitem",
			       0, 0, -1, -1);
	}

      /* draw left size of tree item */
      item_area.x = 0;
      item_area.y = 0;
      item_area.width = (tree_item->pixmaps_box->allocation.width + DEFAULT_DELTA +
			 GTK_TREE (widget->parent)->current_indent + 2);
      item_area.height = widget->allocation.height;


      if (gdk_rectangle_intersect(&item_area, area, &child_area)) 
	{
	  
	  gtk_tree_item_draw_lines(widget);

	  if (tree_item->pixmaps_box && 
	      GTK_WIDGET_VISIBLE(tree_item->pixmaps_box) &&
	      gtk_widget_intersect (tree_item->pixmaps_box, area, &child_area))
	    gtk_widget_draw (tree_item->pixmaps_box, &child_area);
	}

      if (GTK_WIDGET_HAS_FOCUS (widget))
	gtk_paint_focus (widget->style, widget->window,
			 NULL, widget, "treeitem",
			 0, 0,
			 widget->allocation.width - 1,
			 widget->allocation.height - 1);
      
    }
}

static void
gtk_tree_item_draw (GtkWidget    *widget,
		    GdkRectangle *area)
{
  GtkBin *bin;
  GdkRectangle child_area;

  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (widget));
  g_return_if_fail (area != NULL);

  if (GTK_WIDGET_DRAWABLE (widget))
    {
      bin = GTK_BIN (widget);

      gtk_tree_item_paint (widget, area);
     
      if (bin->child && 
	  gtk_widget_intersect (bin->child, area, &child_area))
	gtk_widget_draw (bin->child, &child_area);

    }
}

static void
gtk_tree_item_draw_focus (GtkWidget *widget)
{
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TREE_ITEM (widget));

  gtk_widget_draw(widget, NULL);
}

static gint
gtk_tree_item_button_press (GtkWidget      *widget,