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authorVitaly Minko <vitaly.minko@gmail.com>2010-10-28 03:39:32 +0800
committerGuillaume Desmottes <guillaume.desmottes@collabora.co.uk>2010-10-28 20:30:26 +0800
commit7fc61f47a6133047135b01190ad3dc8e9eed4489 (patch)
tree6640561862ffc7bf1dcc92a410ec97049046afd3 /libempathy-gtk
parent8fcbe3e7f71eeb6bca559dd6c36711b7fa5078c4 (diff)
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Add auto scrolling when drag-and-dropping contacts (#619858).
Diffstat (limited to 'libempathy-gtk')
-rw-r--r--libempathy-gtk/empathy-individual-view.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/libempathy-gtk/empathy-individual-view.c b/libempathy-gtk/empathy-individual-view.c
index 2ad0fc0e0..2e88ac24d 100644
--- a/libempathy-gtk/empathy-individual-view.c
+++ b/libempathy-gtk/empathy-individual-view.c
@@ -93,6 +93,15 @@ typedef struct
typedef struct
{
EmpathyIndividualView *view;
+ guint timeout_id;
+ /* Distance between mouse pointer and the nearby border. Negative when
+ scrolling updards.*/
+ gint distance;
+} AutoScrollData;
+
+typedef struct
+{
+ EmpathyIndividualView *view;
FolksIndividual *individual;
gboolean remove;
} ShowActiveData;
@@ -549,6 +558,32 @@ individual_view_drag_motion_cb (DragMotionData *data)
return FALSE;
}
+/* Minimum distance between the mouse pointer and a horizontal border when we
+ start auto scrolling. */
+#define AUTO_SCROLL_MARGIN_SIZE 20
+/* How far to scroll per one tick. */
+#define AUTO_SCROLL_PITCH 10
+
+static gboolean
+individual_view_auto_scroll_cb (AutoScrollData *data)
+{
+ GtkAdjustment *adj;
+ gdouble new_value;
+
+ adj = gtk_scrollable_get_vadjustment (GTK_TREE_VIEW (data->view));
+
+ if (data->distance < 0)
+ new_value = adj->value - AUTO_SCROLL_PITCH;
+ else
+ new_value = adj->value + AUTO_SCROLL_PITCH;
+
+ new_value = CLAMP (new_value, adj->lower, adj->upper - adj->page_size);
+
+ gtk_adjustment_set_value (adj, new_value);
+
+ return TRUE;
+}
+
static gboolean
individual_view_drag_motion (GtkWidget *widget,
GdkDragContext *context,
@@ -561,6 +596,7 @@ individual_view_drag_motion (GtkWidget *widget,
GdkAtom target;
GtkTreeIter iter;
static DragMotionData *dm = NULL;
+ static AutoScrollData as;
GtkTreePath *path;
gboolean is_row;
gboolean is_different = FALSE;
@@ -570,6 +606,24 @@ individual_view_drag_motion (GtkWidget *widget,
priv = GET_PRIV (EMPATHY_INDIVIDUAL_VIEW (widget));
model = gtk_tree_view_get_model (GTK_TREE_VIEW (widget));
+ if (!as.view)
+ as.view = EMPATHY_INDIVIDUAL_VIEW (widget);
+
+ if (as.timeout_id)
+ g_source_remove (as.timeout_id);
+
+ if (y < AUTO_SCROLL_MARGIN_SIZE ||
+ y > (widget->allocation.height - AUTO_SCROLL_MARGIN_SIZE))
+ {
+ if (y < AUTO_SCROLL_MARGIN_SIZE)
+ as.distance = MIN (-y, -1);
+ else
+ as.distance = MAX (widget->allocation.height - y, 1);
+
+ as.timeout_id = g_timeout_add (10 * ABS (as.distance),
+ (GSourceFunc) individual_view_auto_scroll_cb, &as);
+ }
+
is_row = gtk_tree_view_get_path_at_pos (GTK_TREE_VIEW (widget),
x, y, &path, NULL, NULL, NULL);