Winform - Elliptical Selection without rotation

[gianni.sanzone]

Hi,

Is it possible remove the rotation green dots of Elliptical Selection?

Thanks

[Alex]

Hi,

Yes, this is possible.

Here is C# code that demonstrates how to disable the ability to rotate the elliptical selection in image viewer:

Code: Select all

private void Form1_Load(object sender, EventArgs e)
{
    // specify that image viewer should display image in the best fit mode
    imageViewer1.SizeMode = ImageSizeMode.BestFit;

    // add image to the image viewer
    imageViewer1.Images.Add("AutoContrast.jpg");

    // create the elliptical selection region
    EllipticalSelectionRegion ellipticalSelectionRegion =
        new EllipticalSelectionRegion(new System.Drawing.Rectangle(100, 100, 300, 200));
    // get the interaction controller that transforms the elliptical selection region
    PointBasedObjectRectangularTransformer pointBasedObjectRectangularTransformer =
        ellipticalSelectionRegion.TransformInteractionController as PointBasedObjectRectangularTransformer;
    // if interaction controller is rectangular transformer for the point-based interactive object
    if (pointBasedObjectRectangularTransformer != null)
    {
        // specify that rectangular transformer cannot rotate object
        pointBasedObjectRectangularTransformer.CanRotate = false;
    }

    // create the custom selection tool
    CustomSelectionTool customSelectionTool = new CustomSelectionTool();
    // specify that the custom selection tool should use the elliptical selection region as selection
    customSelectionTool.Selection = ellipticalSelectionRegion;

    // use the custom selection tool as the visual tool in image viewer
    imageViewer1.VisualTool = customSelectionTool;
}

Best regards, Alexander