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scrolledwindow: Enable "hover" mode in scrollbars after a timeout

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This way transient mouse movements over scrollbars don't cause flickering,
and more spaced movements have it enabled shortly.
This commit is contained in:
Carlos Garnacho 2014-12-01 14:25:23 +01:00 committed by Matthias Clasen
parent d2b2b34ae5
commit 7f28077b5a
1 changed files with 57 additions and 14 deletions
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71
gtk/gtkscrolledwindow.c
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@ -177,6 +177,7 @@ typedef struct
gint64 start_time;
gint64 end_time;
guint tick_id;
guint over_timeout_id;
} Indicator;
struct _GtkScrolledWindowPrivate
@ -934,6 +935,12 @@ indicator_set_over (Indicator *indicator,
{
GtkStyleContext *context;
if (indicator->over_timeout_id)
{
g_source_remove (indicator->over_timeout_id);
indicator->over_timeout_id = 0;
}
if (indicator->over == over)
return;
@ -991,6 +998,38 @@ event_close_to_indicator (GtkScrolledWindow *sw,
return FALSE;
}
static gboolean
enable_over_timeout_cb (gpointer user_data)
{
Indicator *indicator = user_data;
indicator_set_over (indicator, TRUE);
return G_SOURCE_REMOVE;
}
static gboolean
check_update_scrollbar_proximity (GtkScrolledWindow *sw,
Indicator *indicator,
GdkEvent *event)
{
gboolean indicator_close;
indicator_close = event_close_to_indicator (sw, indicator, event);
if (indicator->over_timeout_id)
{
g_source_remove (indicator->over_timeout_id);
indicator->over_timeout_id = 0;
}
if (indicator_close)
indicator->over_timeout_id = gdk_threads_add_timeout (30, enable_over_timeout_cb, indicator);
else
indicator_set_over (indicator, FALSE);
return indicator_close;
}
static gboolean
captured_event_cb (GtkWidget *widget,
GdkEvent *event)
@ -1019,13 +1058,17 @@ captured_event_cb (GtkWidget *widget,
indicator_start_fade (&priv->hindicator, 1.0);
indicator_start_fade (&priv->vindicator, 1.0);
/* Check whether we're hovering close to the horizontal scrollbar */
indicator_close = event_close_to_indicator (sw, &priv->hindicator, event);
indicator_set_over (&priv->hindicator, indicator_close);
/* Check whether we're hovering close to the vertical scrollbar */
indicator_close = check_update_scrollbar_proximity (sw, &priv->vindicator,
event);
/* Same for the vertical scrollbar */
indicator_close = event_close_to_indicator (sw, &priv->vindicator, event);
indicator_set_over (&priv->vindicator, indicator_close);
if (!indicator_close)
{
/* Otherwise check the vertical scrollbar */
check_update_scrollbar_proximity (sw, &priv->hindicator, event);
}
else
indicator_set_over (&priv->hindicator, FALSE);
}
else if (event->type == GDK_LEAVE_NOTIFY &&
event->crossing.mode == GDK_CROSSING_UNGRAB)
@ -1035,15 +1078,9 @@ captured_event_cb (GtkWidget *widget,
scrollbar = gtk_get_event_widget (event);
if (scrollbar == priv->hindicator.scrollbar)
{
indicator_close = event_close_to_indicator (sw, &priv->hindicator, event);
indicator_set_over (&priv->hindicator, indicator_close);
}
check_update_scrollbar_proximity (sw, &priv->hindicator, event);
else if (scrollbar == priv->vindicator.scrollbar)
{
indicator_close = event_close_to_indicator (sw, &priv->vindicator, event);
indicator_set_over (&priv->vindicator, indicator_close);
}
check_update_scrollbar_proximity (sw, &priv->vindicator, event);
}
return GDK_EVENT_PROPAGATE;
@ -3823,6 +3860,12 @@ remove_indicator (GtkScrolledWindow *scrolled_window,
indicator->conceil_timer = 0;
}
if (indicator->over_timeout_id)
{
g_source_remove (indicator->over_timeout_id);
indicator->over_timeout_id = 0;
}
if (indicator->tick_id)
{
gtk_widget_remove_tick_callback (scrollbar, indicator->tick_id);