CODController::SetDragScrolling

void CODController::SetDragScrolling(const int nMargin, const int nIncrement = 10, const UINT nTimerElapse = 100, const UINT nTimerID = 1001)

Enables or disables drag scrolling and initializes drag scroll parameters.

Defined in: OdController.cpp

Return Value

void

Parameters

nMargin

Margin for drag scrolling in device units.

Comments

Drag scrolling (or autoscrolling) occurs when the user is holding down the left mouse button and moves into the drag scroll margin. A timer is started when the user enters the drag scroll margin. When the timer fires, the viewport is scrolled by the given increment in a direction determined by which margin (top, left, right, bottom) the cursor is currently in. The timer is stopped when the user releases the mouse button. The margin value is specified in device units (i.e. pixels). Setting the margin to less than or equal to 0 disables drag scrolling.