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Implement scroll wheel scrolling for menus. (#88532)

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2004-12-13  Matthias Clasen  <mclasen@redhat.com>

	* gtk/gtkmenu.c (gtk_menu_scroll): Implement scroll wheel scrolling
	for menus. (#88532)
This commit is contained in:
Matthias Clasen 2004-12-13 18:22:02 +00:00 committed by Matthias Clasen
parent d2cb503ec5
commit b2890f5394
1 changed files with 42 additions and 10 deletions
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52
gtk/gtkmenu.c
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@ -158,6 +158,8 @@ static gboolean gtk_menu_expose (GtkWidget *widget,
GdkEventExpose *event);
static gboolean gtk_menu_key_press (GtkWidget *widget,
GdkEventKey *event);
static gboolean gtk_menu_scroll (GtkWidget *widget,
GdkEventScroll *event);
static gboolean gtk_menu_button_press (GtkWidget *widget,
GdkEventButton *event);
static gboolean gtk_menu_button_release (GtkWidget *widget,
@ -481,6 +483,7 @@ gtk_menu_class_init (GtkMenuClass *class)
widget_class->size_allocate = gtk_menu_size_allocate;
widget_class->show = gtk_menu_show;
widget_class->expose_event = gtk_menu_expose;
widget_class->scroll_event = gtk_menu_scroll;
widget_class->key_press_event = gtk_menu_key_press;
widget_class->button_press_event = gtk_menu_button_press;
widget_class->button_release_event = gtk_menu_button_release;
@ -2800,27 +2803,23 @@ gtk_menu_motion_notify (GtkWidget *widget,
return FALSE;
}
static gboolean
gtk_menu_scroll_timeout (gpointer data)
static void
gtk_menu_scroll_by (GtkMenu *menu,
gint step)
{
GtkMenu *menu;
GtkWidget *widget;
gint offset;
gint view_width, view_height;
GDK_THREADS_ENTER ();
menu = GTK_MENU (data);
widget = GTK_WIDGET (menu);
offset = menu->scroll_offset + menu->scroll_step;
offset = menu->scroll_offset + step;
/* If we scroll upward and the non-visible top part
* is smaller than the scroll arrow it would be
* pretty stupid to show the arrow and taking more
* screen space than just scrolling to the top.
*/
if ((menu->scroll_step < 0) && (offset < MENU_SCROLL_ARROW_HEIGHT))
if ((step < 0) && (offset < MENU_SCROLL_ARROW_HEIGHT))
offset = 0;
/* Don't scroll over the top if we weren't before: */
@ -2837,13 +2836,46 @@ gtk_menu_scroll_timeout (gpointer data)
(offset + view_height > widget->requisition.height))
offset = widget->requisition.height - view_height;
gtk_menu_scroll_to (menu, offset);
if (offset != menu->scroll_offset)
gtk_menu_scroll_to (menu, offset);
}
Static gboolean
gtk_menu_scroll_timeout (gpointer data)
{
GtkMenu *menu;
GDK_THREADS_ENTER ();
menu = GTK_MENU (data);
gtk_menu_scroll_by (menu, menu->scroll_step);
GDK_THREADS_LEAVE ();
return TRUE;
}
static gboolean
gtk_menu_scroll (GtkWidget *widget,
GdkEventScroll *event)
{
GtkMenu *menu = GTK_MENU (widget);
switch (event->direction)
{
case GDK_SCROLL_RIGHT:
case GDK_SCROLL_DOWN:
gtk_menu_scroll_by (menu, MENU_SCROLL_STEP2);
break;
case GDK_SCROLL_LEFT:
case GDK_SCROLL_UP:
gtk_menu_scroll_by (menu, - MENU_SCROLL_STEP2);
break;
}
return TRUE;
}
static void
gtk_menu_handle_scrolling (GtkMenu *menu, gboolean enter)
{