gtktoolbar.c

gtk是linux一款强大的夸平台的图形化开发工具

		     child_space->alloc_x + toolbar->button_maxw *
		     SPACE_LINE_END / SPACE_LINE_DIVISION,
		     child_space->alloc_y +
		     (toolbar->space_size -
		      widget->style->klass->ythickness) / 2);
}

static void
gtk_toolbar_draw (GtkWidget    *widget,
		  GdkRectangle *area)
{
  GtkToolbar *toolbar;
  GList *children;
  GtkToolbarChild *child;
  GdkRectangle child_area;

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

  if (GTK_WIDGET_DRAWABLE (widget))
    {
      toolbar = GTK_TOOLBAR (widget);

      for (children = toolbar->children; children; children = children->next)
	{
	  child = children->data;

	  if (child->type == GTK_TOOLBAR_CHILD_SPACE)
	    {
	      if (toolbar->space_style == GTK_TOOLBAR_SPACE_LINE)
		gtk_toolbar_paint_space_line (widget, area, child);
	    }
	  else if (gtk_widget_intersect (child->widget, area, &child_area))
	    gtk_widget_draw (child->widget, &child_area);
	}
    }
}

static gint
gtk_toolbar_expose (GtkWidget      *widget,
		    GdkEventExpose *event)
{
  GtkToolbar *toolbar;
  GList *children;
  GtkToolbarChild *child;
  GdkEventExpose child_event;

  g_return_val_if_fail (widget != NULL, FALSE);
  g_return_val_if_fail (GTK_IS_TOOLBAR (widget), FALSE);
  g_return_val_if_fail (event != NULL, FALSE);

  if (GTK_WIDGET_DRAWABLE (widget))
    {
      toolbar = GTK_TOOLBAR (widget);

      child_event = *event;

      for (children = toolbar->children; children; children = children->next)
	{
	  child = children->data;

	  if (child->type == GTK_TOOLBAR_CHILD_SPACE)
	    {
	      if (toolbar->space_style == GTK_TOOLBAR_SPACE_LINE)
		gtk_toolbar_paint_space_line (widget, &event->area, child);
	    }
	  else if (GTK_WIDGET_NO_WINDOW (child->widget)
		   && gtk_widget_intersect (child->widget, &event->area, &child_event.area))
	    gtk_widget_event (child->widget, (GdkEvent *) &child_event);
	}
    }

  return FALSE;
}

static void
gtk_toolbar_size_request (GtkWidget      *widget,
			  GtkRequisition *requisition)
{
  GtkToolbar *toolbar;
  GList *children;
  GtkToolbarChild *child;
  gint nbuttons;
  gint button_maxw, button_maxh;
  gint widget_maxw, widget_maxh;
  GtkRequisition child_requisition;

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

  toolbar = GTK_TOOLBAR (widget);

  requisition->width = GTK_CONTAINER (toolbar)->border_width * 2;
  requisition->height = GTK_CONTAINER (toolbar)->border_width * 2;
  nbuttons = 0;
  button_maxw = 0;
  button_maxh = 0;
  widget_maxw = 0;
  widget_maxh = 0;

  for (children = toolbar->children; children; children = children->next)
    {
      child = children->data;

      switch (child->type)
	{
	case GTK_TOOLBAR_CHILD_SPACE:
	  if (toolbar->orientation == GTK_ORIENTATION_HORIZONTAL)
	    requisition->width += toolbar->space_size;
	  else
	    requisition->height += toolbar->space_size;

	  break;

	case GTK_TOOLBAR_CHILD_BUTTON:
	case GTK_TOOLBAR_CHILD_RADIOBUTTON:
	case GTK_TOOLBAR_CHILD_TOGGLEBUTTON:
	  if (GTK_WIDGET_VISIBLE (child->widget))
	    {
	      gtk_widget_size_request (child->widget, &child_requisition);

	      nbuttons++;
	      button_maxw = MAX (button_maxw, child_requisition.width);
	      button_maxh = MAX (button_maxh, child_requisition.height);
	    }

	  break;

	case GTK_TOOLBAR_CHILD_WIDGET:
	  if (GTK_WIDGET_VISIBLE (child->widget))
	    {
	      gtk_widget_size_request (child->widget, &child_requisition);

	      widget_maxw = MAX (widget_maxw, child_requisition.width);
	      widget_maxh = MAX (widget_maxh, child_requisition.height);

	      if (toolbar->orientation == GTK_ORIENTATION_HORIZONTAL)
		requisition->width += child_requisition.width;
	      else
		requisition->height += child_requisition.height;
	    }

	  break;

	default:
	  g_assert_not_reached ();
	}
    }

  if (toolbar->orientation == GTK_ORIENTATION_HORIZONTAL)
    {
      requisition->width += nbuttons * button_maxw;
      requisition->height += MAX (button_maxh, widget_maxh);
    }
  else
    {
      requisition->width += MAX (button_maxw, widget_maxw);
      requisition->height += nbuttons * button_maxh;
    }

  toolbar->button_maxw = button_maxw;
  toolbar->button_maxh = button_maxh;
}

static void
gtk_toolbar_size_allocate (GtkWidget     *widget,
			   GtkAllocation *allocation)
{
  GtkToolbar *toolbar;
  GList *children;
  GtkToolbarChild *child;
  GtkToolbarChildSpace *child_space;
  GtkAllocation alloc;
  GtkRequisition child_requisition;
  gint border_width;

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

  toolbar = GTK_TOOLBAR (widget);
  widget->allocation = *allocation;

  border_width = GTK_CONTAINER (toolbar)->border_width;

  if (toolbar->orientation == GTK_ORIENTATION_HORIZONTAL)
    alloc.x = allocation->x + border_width;
  else
    alloc.y = allocation->y + border_width;

  for (children = toolbar->children; children; children = children->next)
    {
      child = children->data;

      switch (child->type)
	{
	case GTK_TOOLBAR_CHILD_SPACE:

	  child_space = (GtkToolbarChildSpace *) child;

	  if (toolbar->orientation == GTK_ORIENTATION_HORIZONTAL)
	    {
	      child_space->alloc_x = alloc.x;
	      child_space->alloc_y = allocation->y + (allocation->height - toolbar->button_maxh) / 2;
	      alloc.x += toolbar->space_size;
	    }
	  else
	    {
	      child_space->alloc_x = allocation->x + (allocation->width - toolbar->button_maxw) / 2;
	      child_space->alloc_y = alloc.y;
	      alloc.y += toolbar->space_size;
	    }

	  break;

	case GTK_TOOLBAR_CHILD_BUTTON:
	case GTK_TOOLBAR_CHILD_RADIOBUTTON:
	case GTK_TOOLBAR_CHILD_TOGGLEBUTTON:
	  if (!GTK_WIDGET_VISIBLE (child->widget))
	    break;

	  alloc.width = toolbar->button_maxw;
	  alloc.height = toolbar->button_maxh;

	  if (toolbar->orientation == GTK_ORIENTATION_HORIZONTAL)
	    alloc.y = allocation->y + (allocation->height - toolbar->button_maxh) / 2;
	  else
	    alloc.x = allocation->x + (allocation->width - toolbar->button_maxw) / 2;

	  gtk_widget_size_allocate (child->widget, &alloc);

	  if (toolbar->orientation == GTK_ORIENTATION_HORIZONTAL)
	    alloc.x += toolbar->button_maxw;
	  else
	    alloc.y += toolbar->button_maxh;

	  break;

	case GTK_TOOLBAR_CHILD_WIDGET:
	  if (!GTK_WIDGET_VISIBLE (child->widget))
	    break;

	  gtk_widget_get_child_requisition (child->widget, &child_requisition);
	  
	  alloc.width = child_requisition.width;
	  alloc.height = child_requisition.height;

	  if (toolbar->orientation == GTK_ORIENTATION_HORIZONTAL)
	    alloc.y = allocation->y + (allocation->height - child_requisition.height) / 2;
	  else
	    alloc.x = allocation->x + (allocation->width - child_requisition.width) / 2;

	  gtk_widget_size_allocate (child->widget, &alloc);

	  if (toolbar->orientation == GTK_ORIENTATION_HORIZONTAL)
	    alloc.x += child_requisition.width;
	  else
	    alloc.y += child_requisition.height;

	  break;

	default:
	  g_assert_not_reached ();
	}
    }
}

static void
gtk_toolbar_add (GtkContainer *container,
		 GtkWidget    *widget)
{
  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_TOOLBAR (container));
  g_return_if_fail (widget != NULL);

  gtk_toolbar_append_widget (GTK_TOOLBAR (container), widget, NULL, NULL);
}

static void
gtk_toolbar_remove (GtkContainer *container,
		    GtkWidget    *widget)
{
  GtkToolbar *toolbar;
  GList *children;
  GtkToolbarChild *child;

  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_TOOLBAR (container));
  g_return_if_fail (widget != NULL);

  toolbar = GTK_TOOLBAR (container);

  for (children = toolbar->children; children; children = children->next)
    {
      child = children->data;

      if ((child->type != GTK_TOOLBAR_CHILD_SPACE) && (child->widget == widget))
	{
	  gboolean was_visible;

	  was_visible = GTK_WIDGET_VISIBLE (widget);
	  gtk_widget_unparent (widget);

	  toolbar->children = g_list_remove_link (toolbar->children, children);
	  g_free (child);
	  g_list_free (children);
	  toolbar->num_children--;

	  if (was_visible && GTK_WIDGET_VISIBLE (container))
	    gtk_widget_queue_resize (GTK_WIDGET (container));

	  break;
	}
    }
}

static void
gtk_toolbar_forall (GtkContainer *container,
		    gboolean	  include_internals,
		    GtkCallback   callback,
		    gpointer      callback_data)
{
  GtkToolbar *toolbar;
  GList *children;
  GtkToolbarChild *child;

  g_return_if_fail (container != NULL);
  g_return_if_fail (GTK_IS_TOOLBAR (container));
  g_return_if_fail (callback != NULL);

  toolbar = GTK_TOOLBAR (container);

  for (children = toolbar->children; children; children = children->next)
    {
      child = children->data;

      if (child->type != GTK_TOOLBAR_CHILD_SPACE)
	(*callback) (child->widget, callback_data);
    }
}

GtkWidget *
gtk_toolbar_append_item (GtkToolbar    *toolbar,
			 const char    *text,
			 const char    *tooltip_text,
			 const char    *tooltip_private_text,
			 GtkWidget     *icon,
			 GtkSignalFunc  callback,
			 gpointer       user_data)
{
  return gtk_toolbar_insert_element (toolbar, GTK_TOOLBAR_CHILD_BUTTON,
				     NULL, text,
				     tooltip_text, tooltip_private_text,
				     icon, callback, user_data,
				     toolbar->num_children);
}

GtkWidget *
gtk_toolbar_prepend_item (GtkToolbar    *toolbar,
			  const char    *text,
			  const char    *tooltip_text,
			  const char    *tooltip_private_text,
			  GtkWidget     *icon,
			  GtkSignalFunc  callback,
			  gpointer       user_data)
{
  return gtk_toolbar_insert_element (toolbar, GTK_TOOLBAR_CHILD_BUTTON,
				     NULL, text,
				     tooltip_text, tooltip_private_text,
				     icon, callback, user_data,
				     0);
}

GtkWidget *
gtk_toolbar_insert_item (GtkToolbar    *toolbar,
			 const char    *text,
			 const char    *tooltip_text,
			 const char    *tooltip_private_text,
			 GtkWidget     *icon,
			 GtkSignalFunc  callback,
			 gpointer       user_data,
			 gint           position)
{
  return gtk_toolbar_insert_element (toolbar, GTK_TOOLBAR_CHILD_BUTTON,
				     NULL, text,
				     tooltip_text, tooltip_private_text,
				     icon, callback, user_data,
				     position);
}

void
gtk_toolbar_append_space (GtkToolbar *toolbar)
{
  gtk_toolbar_insert_element (toolbar, GTK_TOOLBAR_CHILD_SPACE,
			      NULL, NULL,
			      NULL, NULL,
			      NULL, NULL, NULL,