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Show a scroll cursor when appropriate

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When doing two-finger scrolling or click scrolling using a
trackpoint, show the all-scroll cursor to indicate what is
going on.

https://bugzilla.gnome.org/show_bug.cgi?id=753202
This commit is contained in:
Matthias Clasen 2016-05-31 23:33:54 -04:00
parent 3d0f76801d
commit de8af76897
1 changed files with 51 additions and 4 deletions
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55
gtk/gtkscrolledwindow.c
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@ -241,6 +241,8 @@ struct _GtkScrolledWindowPrivate
GArray *scroll_history;
GdkDevice *scroll_device;
GdkWindow *scroll_window;
GdkCursor *scroll_cursor;
/* These two gestures are mutually exclusive */
GtkGesture *drag_gesture;
@ -1319,7 +1321,6 @@ captured_event_cb (GtkWidget *widget,
GdkDevice *source_device;
GtkWidget *event_widget;
gboolean on_scrollbar;
const gchar *device_name;
sw = GTK_SCROLLED_WINDOW (widget);
priv = sw->priv;
@ -1339,7 +1340,6 @@ captured_event_cb (GtkWidget *widget,
return GDK_EVENT_PROPAGATE;
input_source = gdk_device_get_source (source_device);
device_name = gdk_device_get_name (source_device);
if (input_source == GDK_SOURCE_KEYBOARD ||
input_source == GDK_SOURCE_TOUCHSCREEN)
@ -3243,6 +3243,41 @@ gtk_scrolled_window_size_allocate (GtkWidget *widget,
gtk_widget_set_clip (widget, &clip);
}
static void
install_scroll_cursor (GtkScrolledWindow *scrolled_window,
GdkWindow *window)
{
GtkScrolledWindowPrivate *priv = scrolled_window->priv;
GdkDisplay *display;
GdkCursor *cursor;
if (priv->scroll_window)
return;
priv->scroll_window = window;
priv->scroll_cursor = gdk_window_get_cursor (priv->scroll_window);
if (priv->scroll_cursor)
g_object_ref (priv->scroll_cursor);
display = gdk_window_get_display (priv->scroll_window);
cursor = gdk_cursor_new_from_name (display, "all-scroll");
gdk_window_set_cursor (priv->scroll_window, cursor);
g_object_unref (cursor);
}
static void
uninstall_scroll_cursor (GtkScrolledWindow *scrolled_window)
{
GtkScrolledWindowPrivate *priv = scrolled_window->priv;
if (priv->scroll_window)
{
gdk_window_set_cursor (priv->scroll_window, priv->scroll_cursor);
priv->scroll_window = NULL;
g_clear_object (&priv->scroll_cursor);
}
}
static gboolean
start_scroll_deceleration_cb (gpointer user_data)
{
@ -3252,7 +3287,10 @@ start_scroll_deceleration_cb (gpointer user_data)
priv->scroll_events_overshoot_id = 0;
if (!priv->deceleration_id)
gtk_scrolled_window_start_deceleration (scrolled_window);
{
uninstall_scroll_cursor (scrolled_window);
gtk_scrolled_window_start_deceleration (scrolled_window);
}
return FALSE;
}
@ -3270,6 +3308,7 @@ gtk_scrolled_window_scroll_event (GtkWidget *widget,
GdkScrollDirection direction;
gboolean shifted, start_deceleration = FALSE;
GdkDevice *source_device;
GdkInputSource input_source;
shifted = (event->state & GDK_SHIFT_MASK) != 0;
@ -3278,6 +3317,7 @@ gtk_scrolled_window_scroll_event (GtkWidget *widget,
gtk_scrolled_window_invalidate_overshoot (scrolled_window);
source_device = gdk_event_get_source_device ((GdkEvent *) event);
input_source = gdk_device_get_source (source_device);
if (gdk_event_get_scroll_deltas ((GdkEvent *) event, &delta_x, &delta_y))
{
@ -3289,6 +3329,10 @@ gtk_scrolled_window_scroll_event (GtkWidget *widget,
scroll_history_push (scrolled_window, event);
if (input_source == GDK_SOURCE_TRACKPOINT ||
input_source == GDK_SOURCE_TOUCHPAD)
install_scroll_cursor (scrolled_window, gdk_event_get_window ((GdkEvent *)event));
if (shifted)
{
gdouble delta;
@ -3390,7 +3434,10 @@ gtk_scrolled_window_scroll_event (GtkWidget *widget,
if (start_deceleration &&
scroll_history_finish (scrolled_window, &vel_x, &vel_y))
gtk_scrolled_window_decelerate (scrolled_window, vel_x, vel_y);
{
uninstall_scroll_cursor (scrolled_window);
gtk_scrolled_window_decelerate (scrolled_window, vel_x, vel_y);
}
else if (_gtk_scrolled_window_get_overshoot (scrolled_window, NULL, NULL))
{
priv->scroll_events_overshoot_id =