texthandle: Mind the invisible area when moving the handle

The handle is still centered horizontally, but the extra vertical
space wasn't taken into account, leading to misplacing the dragging
point (and the handle) during motion events.

diff --git a/gtk/gtktexthandle.c b/gtk/gtktexthandle.c
index 226198732eb4868edfb8517446155cc9671d1bf8..ab0495513f2cedebf06d38507bab9e98a38b6bd3 100644 (file)
--- a/gtk/gtktexthandle.c
+++ b/gtk/gtktexthandle.c
@@ -193,14 +193,18 @@ gtk_text_handle_widget_event (GtkWidget     *widget,
            event->motion.state & GDK_BUTTON1_MASK &&
            priv->windows[pos].dragged)
     {
-      gint x, y, width, height;
+      gint x, y, width, height, handle_height;
+      GtkAllocation allocation;
 
-      _gtk_text_handle_get_size (handle, &width, &height);
+      gtk_widget_get_allocation (priv->windows[pos].widget, &allocation);
+      width = allocation.width;
+      height = allocation.height;
+      _gtk_text_handle_get_size (handle, NULL, &handle_height);
       x = event->motion.x - priv->windows[pos].dx + (width / 2);
       y = event->motion.y - priv->windows[pos].dy;
 
       if (pos != GTK_TEXT_HANDLE_POSITION_CURSOR)
-        y += height;
+        y += height - handle_height;
 
       y += priv->windows[pos].pointing_to.height / 2;