Create Annotation on Right Click of C# Window Application

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Create Annotation on Right Click of C# Window Application

Post by dixit.patel1 » Tue Feb 06, 2024 10:33 AM

Hello,

I have created annotation on MouseClick Event but the annotation in not proper placed in location where mouse is right clicked,
it is not working in all tiff files, it shows wrong position and not showing annotation on document viwer.

I am using below Code Snippet.

private void annotationViewer1_MouseClick(object sender, MouseEventArgs e)
{
    if (e.Button == MouseButtons.Right)
    {
        AnnotationView annotationView = null;
        AnnotationData data = null;
        data = new RectangleAnnotationData();
        data.FillBrush = new AnnotationSolidBrush(Color.Green);

        var xPlace = AnnotationViewer.Images[annotationViewer1.FocusedIndex].Resolution.Horizontal;
        var yPlace = AnnotationViewer.Images[annotationViewer1.FocusedIndex].Resolution.Vertical;

        var xPoint = 96 / xPlace;
        var yPoint = 96 / yPlace;

        var xPosition = Convert.ToDecimal(Convert.ToInt32(e.X) * xPoint);
        var yPosition = Convert.ToDecimal(Convert.ToInt32(e.Y) * yPoint);
        var wSize = Convert.ToDecimal(Convert.ToInt32(10) * xPoint);
        var hSize = Convert.ToDecimal(Convert.ToInt32(10) * yPoint);

        var xLocation = Convert.ToDecimal(xPosition + wSize / 2);
        var yLocation = Convert.ToDecimal(yPosition + hSize / 2);

        data.Location = new Point(Convert.ToInt32(xLocation), Convert.ToInt32(yLocation));
        data.Size = new Size(Convert.ToInt32(wSize), Convert.ToInt32(hSize));

        if (data != null)
        {
            // start the annotation building
            AnnotationViewer.AddAndBuildAnnotation(data);
        }
    }
}

Re: Create Annotation on Right Click of C# Window Application

Post by Alex » Tue Feb 06, 2024 02:04 PM

Hello,

Your code has logical mistake.

If you want to convert screen point into viewer point, please use the ImageViewer.PointToClient method.

If you want to convert viewer point into annotation point, please use the ImageViewer.PointFromControlToDip method.

Best regards, Alexander

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