gtktogglebutton.c

gtk是linux一款强大的夸平台的图形化开发工具

      y = 0;
      width = widget->allocation.width - GTK_CONTAINER (widget)->border_width * 2;
      height = widget->allocation.height - GTK_CONTAINER (widget)->border_width * 2;

      gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
      gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);

      if (GTK_WIDGET_HAS_DEFAULT (widget) &&
          GTK_BUTTON (widget)->relief == GTK_RELIEF_NORMAL)
        {
          gtk_paint_box (widget->style, widget->window,
                         GTK_STATE_NORMAL, GTK_SHADOW_IN,
                         area, widget, "togglebuttondefault",
                         x, y, width, height);
        }

      if (GTK_WIDGET_CAN_DEFAULT (widget))
        {
          x += widget->style->klass->xthickness;
          y += widget->style->klass->ythickness;
          width -= 2 * x + DEFAULT_SPACING;
          height -= 2 * y + DEFAULT_SPACING;
          x += DEFAULT_LEFT_POS;
          y += DEFAULT_TOP_POS;
        }

      if (GTK_WIDGET_HAS_FOCUS (widget))
	{
	  x += 1;
	  y += 1;
	  width -= 2;
	  height -= 2;
	}

      if ((GTK_WIDGET_STATE (widget) == GTK_STATE_ACTIVE) ||
	  toggle_button->active)
	shadow_type = GTK_SHADOW_IN;
      else
	shadow_type = GTK_SHADOW_OUT;
      
      if (button->relief != GTK_RELIEF_NONE ||
	  (GTK_WIDGET_STATE(widget) != GTK_STATE_NORMAL &&
	   GTK_WIDGET_STATE(widget) != GTK_STATE_INSENSITIVE))
	gtk_paint_box (widget->style, widget->window,
		       GTK_WIDGET_STATE (widget),
		       shadow_type, area, widget, "togglebutton",
		       x, y, width, height);
      
      if (GTK_WIDGET_HAS_FOCUS (widget))
	{
	  x -= 1;
	  y -= 1;
	  width += 2;
	  height += 2;

	  gtk_paint_focus (widget->style, widget->window,
			   area, widget, "togglebutton",
			   x, y, width - 1, height - 1);
	}
    }
}

static void
gtk_toggle_button_size_allocate (GtkWidget     *widget,
				 GtkAllocation *allocation)
{
  if (!GTK_WIDGET_NO_WINDOW (widget) &&
      GTK_WIDGET_CLASS (parent_class)->size_allocate)
    GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
}

static gint
gtk_toggle_button_expose (GtkWidget      *widget,
			  GdkEventExpose *event)
{
  if (!GTK_WIDGET_NO_WINDOW (widget) &&
      GTK_WIDGET_CLASS (parent_class)->expose_event)
    return GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
  else
    return FALSE;
}

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

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

  bin = GTK_BIN (widget);

  if (GTK_WIDGET_DRAWABLE (widget) && !GTK_WIDGET_NO_WINDOW (widget))
    {
      tmp_area = *area;
      tmp_area.x -= GTK_CONTAINER (widget)->border_width;
      tmp_area.y -= GTK_CONTAINER (widget)->border_width;

      gtk_toggle_button_paint (widget, &tmp_area);

      if (bin->child && gtk_widget_intersect (bin->child, &tmp_area, &child_area))
	gtk_widget_draw (bin->child, &child_area);
    }
}

static void
gtk_toggle_button_pressed (GtkButton *button)
{
  GtkToggleButton *toggle_button;
  GtkStateType new_state;

  g_return_if_fail (button != NULL);
  g_return_if_fail (GTK_IS_TOGGLE_BUTTON (button));

  toggle_button = GTK_TOGGLE_BUTTON (button);

  button->button_down = TRUE;

  if (toggle_button->active)
    new_state = (button->in_button ? GTK_STATE_NORMAL : GTK_STATE_ACTIVE);
  else
    new_state = (button->in_button ? GTK_STATE_ACTIVE : GTK_STATE_NORMAL);

  if (GTK_WIDGET_STATE (button) != new_state)
    gtk_widget_set_state (GTK_WIDGET (button), new_state);
}

static void
gtk_toggle_button_released (GtkButton *button)
{
  GtkToggleButton *toggle_button;
  GtkStateType new_state;

  g_return_if_fail (button != NULL);
  g_return_if_fail (GTK_IS_TOGGLE_BUTTON (button));

  if (button->button_down)
    {
      toggle_button = GTK_TOGGLE_BUTTON (button);

      button->button_down = FALSE;

      if (button->in_button)
	{
	  gtk_button_clicked (button);
	}
      else
	{
	  if (toggle_button->active)
	    new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
	  else
	    new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);

	  if (GTK_WIDGET_STATE (button) != new_state)
	    gtk_widget_set_state (GTK_WIDGET (button), new_state);
	}
    }
}

static void
gtk_toggle_button_clicked (GtkButton *button)
{
  GtkToggleButton *toggle_button;
  GtkStateType new_state;

  g_return_if_fail (button != NULL);
  g_return_if_fail (GTK_IS_TOGGLE_BUTTON (button));

  toggle_button = GTK_TOGGLE_BUTTON (button);
  toggle_button->active = !toggle_button->active;

  gtk_toggle_button_toggled (toggle_button);

  if (toggle_button->active)
    new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_ACTIVE);
  else
    new_state = (button->in_button ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL);

  if (GTK_WIDGET_STATE (button) != new_state)
    gtk_widget_set_state (GTK_WIDGET (button), new_state);
  else
    gtk_widget_queue_draw (GTK_WIDGET (button));
}

static void
gtk_toggle_button_enter (GtkButton *button)
{
  GtkToggleButton *toggle_button;
  GtkStateType new_state;

  g_return_if_fail (button != NULL);
  g_return_if_fail (GTK_IS_TOGGLE_BUTTON (button));

  toggle_button = GTK_TOGGLE_BUTTON (button);

  if (toggle_button->active)
    new_state = (button->button_down ? GTK_STATE_NORMAL : GTK_STATE_PRELIGHT);
  else
    new_state = (button->button_down ? GTK_STATE_ACTIVE : GTK_STATE_PRELIGHT);

  if (GTK_WIDGET_STATE (button) != new_state)
    gtk_widget_set_state (GTK_WIDGET (button), new_state);
}

static void
gtk_toggle_button_leave (GtkButton *button)
{
  GtkToggleButton *toggle_button;
  GtkStateType new_state;

  g_return_if_fail (button != NULL);
  g_return_if_fail (GTK_IS_TOGGLE_BUTTON (button));

  toggle_button = GTK_TOGGLE_BUTTON (button);

  new_state = (toggle_button->active ? GTK_STATE_ACTIVE : GTK_STATE_NORMAL);

  if (GTK_WIDGET_STATE (button) != new_state)
    gtk_widget_set_state (GTK_WIDGET (button), new_state);
}

static void
gtk_toggle_button_realize (GtkWidget *widget)
{
  GtkToggleButton *toggle_button;
  GdkWindowAttr attributes;
  gint attributes_mask;
  gint border_width;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));
  
  toggle_button = GTK_TOGGLE_BUTTON (widget);
  GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
  
  border_width = GTK_CONTAINER (widget)->border_width;
  
  attributes.window_type = GDK_WINDOW_CHILD;
  attributes.x = widget->allocation.x + border_width;
  attributes.y = widget->allocation.y + border_width;
  attributes.width = widget->allocation.width - border_width * 2;
  attributes.height = widget->allocation.height - border_width * 2;
  attributes.event_mask = gtk_widget_get_events (widget);
  attributes.event_mask |= (GDK_EXPOSURE_MASK |
			    GDK_BUTTON_PRESS_MASK |
			    GDK_BUTTON_RELEASE_MASK |
			    GDK_ENTER_NOTIFY_MASK |
			    GDK_LEAVE_NOTIFY_MASK);

  if (GTK_WIDGET_NO_WINDOW (widget))
    {
      attributes.wclass = GDK_INPUT_ONLY;
      attributes_mask = GDK_WA_X | GDK_WA_Y;

      widget->window = gtk_widget_get_parent_window (widget);
      gdk_window_ref (widget->window);
      
      toggle_button->event_window = gdk_window_new (gtk_widget_get_parent_window (widget),
						    &attributes, attributes_mask);
      gdk_window_set_user_data (toggle_button->event_window, toggle_button);
    }
  else
    {
      attributes.wclass = GDK_INPUT_OUTPUT;
      attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
      attributes.visual = gtk_widget_get_visual (widget);
      attributes.colormap = gtk_widget_get_colormap (widget);
      widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
				       &attributes, attributes_mask);
      gdk_window_set_user_data (widget->window, toggle_button);
    }

  widget->style = gtk_style_attach (widget->style, widget->window);

  if (!GTK_WIDGET_NO_WINDOW (widget))
    gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
}
  
static void
gtk_toggle_button_unrealize (GtkWidget *widget)
{
  GtkToggleButton *toggle_button;
  
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));

  toggle_button = GTK_TOGGLE_BUTTON (widget);
  
  if (GTK_WIDGET_NO_WINDOW (widget))
    {
      gdk_window_set_user_data (toggle_button->event_window, NULL);
      gdk_window_destroy (toggle_button->event_window);
      toggle_button->event_window = NULL;
    }

  if (GTK_WIDGET_CLASS (parent_class)->unrealize)
    (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}

static void
gtk_toggle_button_map (GtkWidget *widget)
{
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));

  if (GTK_WIDGET_NO_WINDOW (widget))
    gdk_window_show (GTK_TOGGLE_BUTTON (widget)->event_window);

  GTK_WIDGET_CLASS (parent_class)->map (widget);
}

static void
gtk_toggle_button_unmap (GtkWidget *widget)
{
  g_return_if_fail (widget != NULL);
  g_return_if_fail (GTK_IS_TOGGLE_BUTTON (widget));

  if (GTK_WIDGET_NO_WINDOW (widget))
    gdk_window_hide (GTK_TOGGLE_BUTTON (widget)->event_window);

  GTK_WIDGET_CLASS (parent_class)->unmap (widget);
}