IDLitDirectWindow::OnWheel

Syntax | Arguments | Keywords | Version History

The IDLitDirectWindow::OnWheel procedure method handles notification (from the native window device) that a mouse wheel event has occurred.

Note
This method is only useful in conjunction with the Export Bridge. The method is only a stub and provides no functionality. In your subclass of IDLitDirectWindow, you should override this method to provide your own functionality. Your method will be automatically called by the Export Bridge. For more information, see Exporting Drawable Objects (IDL Connectivity Bridges).

Syntax

Obj->[IDLitDirectWindow::]OnWheel, X, Y, Delta, Modifiers

Arguments

X

A long integer representing the x-location (in device coordinates) of the mouse event.

Y

A long integer representing the y-location (in device coordinates) of the mouse event.

Delta

A long integer giving the direction and distance that the wheel was rolled. Pushing the wheel towards the front of the mouse generates positive values, pulling the wheel towards the back of the mouse generates negative values. The magnitude of the value depends on the device setting for the individual mouse.

Modifiers

A long integer containing a bitwise mask indicating which modifier keys are active at the time of the wheel event. If a bit is zero, the key is up; if the bit is set, the key is pressed. The following table describes the bits in this bit mask:

Keywords

None

Version History