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Guest  
#1 Posted : Thursday, April 14, 2016 4:28:04 AM(UTC)
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Hi,

when i zoom on my pdf i have this screen not all the time...
How can i solve this issue ?

Thanks

UserPostedImage
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Paul Rayman  
#2 Posted : Friday, April 15, 2016 4:24:24 AM(UTC)
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You must limit the maximum size of the page when zooming
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#3 Posted : Friday, April 22, 2016 1:53:05 AM(UTC)
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how i can do that please ?
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Paul Rayman  
#4 Posted : Friday, April 22, 2016 3:49:39 AM(UTC)
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somehow like this:

Code:

protected override void OnMouseWheel(MouseEventArgs e)
{
	if ((ModifierKeys & Keys.Control) == Keys.Control)
	{
		float newZoom = Zoom;
		if (e.Delta < 0)
			newZoom *= 0.9f;
		else
			newZoom /= 0.9f;

		if (_maxPageSize * newZoom >100 &&_maxPageSize * newZoom < 5000)
			Zoom = newZoom;

	}
	else
		base.OnMouseWheel(e);
}
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#5 Posted : Monday, April 25, 2016 12:19:01 AM(UTC)
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it doesn't work and i need to be able to zoom on a element. but with your method i can zoom 150 % max.

i catch pdfiumexception or outofmemory


Code:
Point p = e.GetPosition(null);
            float newzoom = this.pdfViewer.Zoom;
            if (e.Delta > 0)
            {
                newzoom /= 0.9f;
            }
            else
            {
                newzoom *= 0.9f;
            }
            if (700 * newzoom > 100 && 700 * newzoom < 5000)
            {
                this.pdfViewer.Zoom = newzoom;
                this.pdfViewer.PageToClient(this.pdfViewer.CurrentIndex, p);
            }


how can i know the _maxPageSize varible and i use wpf

error :

Patagames.Pdf.Net.Exceptions.PdfiumException: Unexpected error code.
at Patagames.Pdf.Net.PdfBitmap..ctor(IntPtr handle)
at Patagames.Pdf.Net.PdfBitmap.Clone(FX_RECT clip)
at Patagames.Pdf.Net.Controls.Wpf.PdfViewer.DrawPage(DrawingContext drawingContext, PdfPage page, Rect actualRect)

Edited by user Tuesday, April 26, 2016 1:21:30 AM(UTC)  | Reason: Not specified
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