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已答覆How to limit how far one can zoom in & out

  • Monday, 15 June, 2009 5:55Radeldudel 使用者勳章使用者勳章使用者勳章使用者勳章使用者勳章
     包含代碼

    Is there a way to limit how far the viewer can zoom into or out of the picture?

    I would like to stop the zooming in when the viewer reaches the pixel level, and the zooming out to the size of the picture.

    To be able to zoom until the picture content either looks blurry or is small on the screen is not very appealing to me.

    Is there a way to achieve this, to limit the zoom range?

    kind regards,
    Sam

解答

  • Tuesday, 16 June, 2009 4:02Baruni 使用者勳章使用者勳章使用者勳章使用者勳章使用者勳章
     已答覆包含代碼
    You can change the code in the page.xaml.cs file. I'm not sure if there are other ways of setting it but this is how I set it:

    In the example below, the zoom level is set between 0.45 and 128


            private void Zoom(double newzoom, Point p)
            {
                if (newzoom < 0.45)
                {
                    newzoom = 0.45;
                }
                if (newzoom > 128)
                {
                    newzoom = 128;
                }
    
                msi.ZoomAboutLogicalPoint(newzoom / zoom, p.X, p.Y);
                zoom = newzoom;
            }
    
    • 已標示為解答Radeldudel Tuesday, 16 June, 2009 6:45
    •  

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  • Tuesday, 16 June, 2009 4:02Baruni 使用者勳章使用者勳章使用者勳章使用者勳章使用者勳章
     已答覆包含代碼
    You can change the code in the page.xaml.cs file. I'm not sure if there are other ways of setting it but this is how I set it:

    In the example below, the zoom level is set between 0.45 and 128


            private void Zoom(double newzoom, Point p)
            {
                if (newzoom < 0.45)
                {
                    newzoom = 0.45;
                }
                if (newzoom > 128)
                {
                    newzoom = 128;
                }
    
                msi.ZoomAboutLogicalPoint(newzoom / zoom, p.X, p.Y);
                zoom = newzoom;
            }
    
    • 已標示為解答Radeldudel Tuesday, 16 June, 2009 6:45
    •