[goobox] fixed skipping to a specific position

[Paolo Bacchilega <paobac src gnome org>]

commit 31dbbae872b850314be6eecf16c82c81174d4c38
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sun Jun 3 14:03:45 2012 +0200

    fixed skipping to a specific position

 src/goo-player-info.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/src/goo-player-info.c b/src/goo-player-info.c
index 38a5055..58aff8b 100644
--- a/src/goo-player-info.c
+++ b/src/goo-player-info.c
@@ -261,6 +261,16 @@ time_scale_button_press_cb (GtkRange         *range,
 			    GdkEventButton   *event,
 			    GooPlayerInfo    *info)
 {
+        /* In an audio player when clicking on the progress bar the user expect
+         * to jump to the specified position directly instead of scrolling one
+         * page up or down as happens by default in Gtk+.  The button 2
+         * behavior is what we want by default for button 1. */
+
+        if (event->button == 1)
+                event->button = 2;
+        else if (event->button == 2)
+                event->button = 1;
+
 	info->priv->dragging = TRUE;
 	info->priv->update_id = g_timeout_add (UPDATE_TIMEOUT,
 					       update_time_label_cb,
@@ -274,12 +284,22 @@ time_scale_button_release_cb (GtkRange         *range,
 			      GdkEventButton   *event,
 			      GooPlayerInfo    *info)
 {
+        /* Swap button 1 and 2 behaviors, see time_scale_button_press_cb
+         * for an explanation. */
+
+        if (event->button == 1)
+                event->button = 2;
+        else if (event->button == 2)
+                event->button = 1;
+
 	if (info->priv->update_id != 0) {
 		g_source_remove (info->priv->update_id);
 		info->priv->update_id = 0;
 	}
 
 	info->priv->dragging = FALSE;
+	g_signal_emit_by_name (range, "value-changed");
+
 	return FALSE;
 }