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scrolledwindow: Set positional classes on scrollbars

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This might be useful for some themes.
This commit is contained in:
Matthias Clasen 2015-11-06 23:28:22 -05:00
parent f900bec4fa
commit 353bfb0092
1 changed files with 69 additions and 4 deletions
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73
gtk/gtkscrolledwindow.c
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@ -109,12 +109,17 @@
* # CSS nodes
*
* GtkScrolledWindow has a main CSS node with name scrolledwindow.
* It uses transient subnodes with names overshoot and undershoot to
*
* It uses subnodes with names overshoot and undershoot to
* draw the overflow and underflow indications. These nodes get
* the .left, .right, .top or .bottom style class added depending
* on where the indication is drawn. If both scrollbars are visible,
* the area where they meet is drawn with a transient subnode named
* junction.
* on where the indication is drawn.
*
* GtkScrolledWindow also sets the positional style classes (.left,
* .right, .top, .bottom) on the scrollbars.
*
* If both scrollbars are visible, the area where they meet is drawn
* with a subnode named junction.
*/
@ -428,6 +433,62 @@ gtk_scrolled_window_leave_notify (GtkWidget *widget,
return GDK_EVENT_PROPAGATE;
}
static void
update_scrollbar_positions (GtkScrolledWindow *scrolled_window)
{
GtkScrolledWindowPrivate *priv = scrolled_window->priv;
GtkStyleContext *context;
gboolean is_rtl;
if (priv->hscrollbar != NULL)
{
context = gtk_widget_get_style_context (priv->hscrollbar);
if (priv->window_placement == GTK_CORNER_TOP_LEFT ||
priv->window_placement == GTK_CORNER_TOP_RIGHT)
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM);
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_TOP);
}
else
{
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BOTTOM);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP);
}
}
if (priv->vscrollbar != NULL)
{
context = gtk_widget_get_style_context (priv->vscrollbar);
is_rtl = gtk_widget_get_direction (GTK_WIDGET (scrolled_window)) == GTK_TEXT_DIR_RTL;
if ((is_rtl &&
(priv->window_placement == GTK_CORNER_TOP_RIGHT ||
priv->window_placement == GTK_CORNER_BOTTOM_RIGHT)) ||
(!is_rtl &&
(priv->window_placement == GTK_CORNER_TOP_LEFT ||
priv->window_placement == GTK_CORNER_BOTTOM_LEFT)))
{
gtk_style_context_add_class (context, GTK_STYLE_CLASS_LEFT);
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_RIGHT);
}
else
{
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_LEFT);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_RIGHT);
}
}
}
static void
gtk_scrolled_window_direction_changed (GtkWidget *widget,
GtkTextDirection previous_dir)
{
GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (widget);
update_scrollbar_positions (scrolled_window);
GTK_WIDGET_CLASS (gtk_scrolled_window_parent_class)->direction_changed (widget, previous_dir);
}
static void
gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
{
@ -457,6 +518,7 @@ gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
widget_class->realize = gtk_scrolled_window_realize;
widget_class->unrealize = gtk_scrolled_window_unrealize;
widget_class->leave_notify_event = gtk_scrolled_window_leave_notify;
widget_class->direction_changed = gtk_scrolled_window_direction_changed;
container_class->add = gtk_scrolled_window_add;
container_class->remove = gtk_scrolled_window_remove;
@ -1470,6 +1532,7 @@ gtk_scrolled_window_set_hadjustment (GtkScrolledWindow *scrolled_window,
gtk_widget_set_parent (priv->hscrollbar, GTK_WIDGET (scrolled_window));
g_object_ref (priv->hscrollbar);
gtk_widget_show (priv->hscrollbar);
update_scrollbar_positions (scrolled_window);
}
else
{
@ -1537,6 +1600,7 @@ gtk_scrolled_window_set_vadjustment (GtkScrolledWindow *scrolled_window,
gtk_widget_set_parent (priv->vscrollbar, GTK_WIDGET (scrolled_window));
g_object_ref (priv->vscrollbar);
gtk_widget_show (priv->vscrollbar);
update_scrollbar_positions (scrolled_window);
}
else
{
@ -1730,6 +1794,7 @@ gtk_scrolled_window_set_placement_internal (GtkScrolledWindow *scrolled_window,
if (priv->window_placement != window_placement)
{
priv->window_placement = window_placement;
update_scrollbar_positions (scrolled_window);
gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));