Indicates that the tool calls View.Update each time the view position or scale is changed. If the map is fast to update, this will work well. However, for slower map configurations, the Bitmap update mode may work better.

Indicates that the tool at the beginning of the operation takes a bitmap copy of the window contents. It then uses this bitmap to redraw the map window during the operation. This may be much quicker than calling View.Update each time, thereby giving better feedback to the user. The downside is that the map is not correctly redrawn; new exposed areas are not filled in, and the image quality may be degraded when the user is zooming. When the user releases the mouse, the tool will call View.Update once, restoring full quality.

Indicates that the tool calls View::update each time the view position or scale is changed. If the map is fast to update, this will work well. However, for slower map configurations, the ToolUpdateModeBitmap update mode may work better.

Indicates that the tool at the beginning of the operation takes a bitmap copy of the window contents. It then uses this bitmap to redraw the map window during the operation. This may be much quicker than calling View::update each time, thereby giving better feedback to the user. The downside is that the map is not correctly redrawn; new exposed areas are not filled in, and the image quality may be degraded when the user is zooming. When the user releases the mouse, the tool will call View::update once, restoring full quality.

Indicates that the tool calls View.update each time the view position or scale is changed. If the map is fast to update, this will work well. However, for slower map configurations, the BITMAP update mode may work better.

Indicates that the tool at the beginning of the operation takes a bitmap copy of the window contents. It then uses this bitmap to redraw the map window during the operation. This may be much quicker than calling View.update each time, thereby giving better feedback to the user. The downside is that the map is not correctly redrawn; new exposed areas are not filled in, and the image quality may be degraded when the user is zooming. When the user releases the mouse, the tool will call View.update once, restoring full quality.