A move_gesture defines the behaviour necessary to allow
the user dragging a graphical
object with the mouse over it's graphical device.
While dragging, the cursor is changed to a fleur
By default, the move_gesture is associated with the middle
mouse-button.
- move_gesture <-
offset: point
- While active, the distance between the top-left corner of the graphical
moved and the cursor. Set by move_gesture
->initiate.
- move_gesture ->drag: event
- Moves the graphical using the move_gesture
->do_set
behaviour so that the distance between the cursor and the top-left
remains the same as when the gesture was initiated.
- move_gesture ->initialise: button=[button_name],
modifier=[modifier]
- Create a move_gesture, associated with a button with modifiers. Both the
button and the modifiers are determined by their class-variables. One
should avoid to use explicit binding of a move gesture to some button.
Defaults: button Resource defined (middle) modifiers Resource
defined (none)
- move_gesture ->initiate: event
- Fills move_gesture
<-offset
with the distance of the mouse-down event to the top-left corner of the
graphical on which the move is initiated. Sets the cursor to move_gesture.cursor.
- move_gesture ->terminate: event
- Equivalent to move_gesture
->drag.
- move_gesture ->verify: event
- Succeeds if the receiving graphical
object has move_gesture
<->device not
equal to
@nil.
