Checks to see if a mouse drag starting at (start_x, start_y) and ending at (current_x,
current_y) has passed the GTK+ drag threshold, and thus should trigger the beginning of a drag-and-drop operation.
| this |
a Widget |
| start_x |
X coordinate of start of drag |
| start_y |
Y coordinate of start of drag |
| current_x |
current X coordinate |
| current_y |
current Y coordinate |
|
true if the drag threshold has been passed. |