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POReplace Image with cropped BitmapSource
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2012-01-27T15:08:17.827
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I have an Image on my wpf control and I am trying to generate croped part of it - this is ok more or less. I have used a codeproject solution to generate BitmapSource of croped image (<a href="http://www.codeproject.com/KB/WPF/CropAdorner.aspx" rel="nofollow">http://www.codeproject.com/KB/WPF/CropAdorner.aspx</a>) but when I am trying to replace current image with generated BitmapSource like this <pre><code>imgCurrent.Source = generatedBitmapSource; </code></pre> I see very strange behaviour (( I need an advice how to change current Image with new based on BitmapSource. my XAML(there is nothing extraordinary - and by the right click I am trying to replace currentImage with croped): <pre><code><DockPanel Height="395" Width="926">  <Image x:Name="imgCurrent" VerticalAlignment="Center" HorizontalAlignment="Center" MouseRightButtonDown="imgCurrent_MouseRightButtonDown"/> </DockPanel> </code></pre> right click: <pre><code> private void imgCurrent_MouseRightButtonDown(object sender, MouseButtonEventArgs e) { generatedBitmapSource = _clp.BpsCrop(); //this clears croping adonder AdornerLayer aly = AdornerLayer.GetAdornerLayer(_felCur); aly.Remove(_clp); // imageCurrent.Source = generatedBitmapSource; } </code></pre> croping method (from codeproject): <pre><code>public BitmapSource BpsCrop() { Thickness margin = AdornerMargin(); Rect rcInterior = _prCropMask.RectInterior; Point pxFromSize = UnitsToPx(rcInterior.Width, rcInterior.Height); // It appears that CroppedBitmap indexes from the upper left of the margin whereas RenderTargetBitmap renders the // control exclusive of the margin. Hence our need to take the margins into account here... Point pxFromPos = UnitsToPx(rcInterior.Left + margin.Left, rcInterior.Top + margin.Top); Point pxWhole = UnitsToPx(AdornedElement.RenderSize.Width + margin.Left, AdornedElement.RenderSize.Height + margin.Left); pxFromSize.X = Math.Max(Math.Min(pxWhole.X - pxFromPos.X, pxFromSize.X), 0); pxFromSize.Y = Math.Max(Math.Min(pxWhole.Y - pxFromPos.Y, pxFromSize.Y), 0); if (pxFromSize.X == 0 || pxFromSize.Y == 0) { return null; } System.Windows.Int32Rect rcFrom = new System.Windows.Int32Rect(pxFromPos.X, pxFromPos.Y, pxFromSize.X, pxFromSize.Y); RenderTargetBitmap rtb = new RenderTargetBitmap(pxWhole.X, pxWhole.Y, s_dpiX, s_dpiY, PixelFormats.Default); rtb.Render(AdornedElement); return new CroppedBitmap(rtb, rcFrom); } </code></pre>
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<c#><wpf><image><xaml>
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Replace Image with cropped BitmapSource
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