 |
| Function |
Declared in: NiGraph3DEvents.h |
Declaration
void OnZoom(
VARIANT FAR* NewDistance);
Description
Generated when you zoom in or out on the plot.
Notes:
1. This event is generated only if the CNiGraph.TrackMode property is set to TrackZoomPanRotate.
2. Zooming is performed by holding down the <Alt> key and the left mouse button and moving the mouse forward and backward.
3. Zooming also can be performed by rotating the mouse wheel if your mouse is equipped with one. Press and hold the <Ctrl> key to decrease the granularity of zooming with the mouse wheel.
Parameters
VARIANT FAR* NewDistance
New distance of the viewing position from the origin.
Note: Use CNiVariant to get to the underlying data.
See Also
Example
void OnZoomCwgraph3d1(VARIANT FAR* NewDistance) {
if (CNiVariant(NewDistance) < 50) {
*NewDistance = CNiVariant(50);
}
}