MapControl.ZoomTrackBar sensibility

Hi Maxim,
Is there any solution to override the internal Map Control code somehow which is calculates the zooming value when the mouse is wheeling? I don't like to remove the built-in zooming control because of design reasons.
Thanks,
Zoltán

I suggest that you look at the Maps Control event zoomLevel thread. You can handle the LayerBase.ViewportChanged event and modify the MapControl.ZoomLevel property according to your requirements.

Thank you Maxim! These links was helped me to achieve my reqs.

You are welcome.

I've the same experience. I'd like to have 0.5 steps in the zoomlevel (in the ZoomTrackbar or middle mouse). Please share your solution.

Hello Frank,
Please refer to the Maps Control event zoomLevel thread. I have attached a sample to my comment.

Hi Maxim,
I'm aware of this viewportchanged event. But when this event is raised I don't have the old zoomlevel. As far as I know there is no changing event, in that case I could alter the zoomlevel.
What I like is when a user is at level 7 and wants to zoom in via the middle mouse scroll thing, he goes to level 7.5.

Hi Frank,

Thank you for your clarification. While at present, there is no suitable method to override the Zoom command behavior and provide custom zoom level steps, it is possible to disable the built-in zooming feature (see the MapControl -> EnableZooming property) and handle the MapControl.MouseWheel event to adjust the Zoom level manually.

C#
private void MapControlMaps_MouseWheel(object sender, MouseWheelEventArgs e) {  
    double actualDelta = MapControlMaps.ZoomLevel + e.Delta / 240;  
    if (actualDelta> 0 && actualDelta < 15) {  
        MapControlMaps.ZoomLevel += (e.Delta / 240);  
    }  
}  

Hi Alex,
After casting the e.Delta this idea works:
mapControl1.ZoomLevel += ((double)e.Delta / 240);
However the panning is not correct. I'm expecting after a zoom in, the item underneath the mouse cursor remains under the mouse cursor. Now the centre point of the map remains the same.
But when I keep EnableZooming to true and use PreviewMouseWheel your approach also works.