samples:samples:zooming
Table of Contents
Zooming sample
Documentation | Samples | Zooming
Summary
How to perform zooming using mouse movement and mouse wheel. Also how to change a mode of mouse operation: zoom vs drag.
Description
This sample illustrates use of:
| Name | Description |
|---|---|
| TGIS_Viewer.Open | Open project. |
| TGIS_Viewer.FullExtent | Calculate the screen origin, zoom, and viewport to place the whole map in the window. |
| TGIS_ViewerWnd.Mode | Mode of reaction to mouse events. |
| TGIS_ViewerWnd.ZoomBy | Zoom the viewer. |
Code
This sample is available on the following platforms (click to view the source code on GitHub):
2025/12/31 10:51