internal void SaveWorkspaceAsImage(string path) { var initialized = false; var bounds = new Rect(); double minX = 0.0, minY = 0.0; var dragCanvas = WpfUtilities.ChildOfType <DragCanvas>(this); var childrenCount = VisualTreeHelper.GetChildrenCount(dragCanvas); for (int index = 0; index < childrenCount; ++index) { var child = VisualTreeHelper.GetChild(dragCanvas, index); var firstChild = VisualTreeHelper.GetChild(child, 0); switch (firstChild.GetType().Name) { case "NodeView": case "NoteView": case "AnnotationView": break; // Until we completely removed InfoBubbleView (or fixed its broken // size calculation), we will not be including it in our size // calculation here. This means that the info bubble, if any, will // still go beyond the boundaries of the final PNG file. I would // prefer not to add this hack here as it introduces multiple issues // (including NaN for Grid inside the view and the fix would be too // ugly to type in). Suffice to say that InfoBubbleView is not // included in the size calculation for screen capture (work-around // should be obvious). // // case "InfoBubbleView": // child = WpfUtilities.ChildOfType<Grid>(child); // break; // We do not take anything other than those above // into consideration when the canvas size is measured. default: continue; } // Determine the smallest corner of all given visual elements on the // graph. This smallest top-left corner value will be useful in making // the offset later on. // var childBounds = VisualTreeHelper.GetDescendantBounds(child as Visual); minX = childBounds.X < minX ? childBounds.X : minX; minY = childBounds.Y < minY ? childBounds.Y : minY; childBounds.X = (double)(child as Visual).GetValue(Canvas.LeftProperty); childBounds.Y = (double)(child as Visual).GetValue(Canvas.TopProperty); if (initialized) { bounds.Union(childBounds); } else { initialized = true; bounds = childBounds; } } // Nothing found in the canvas, bail out. if (!initialized) { return; } // Add padding to the edge and make them multiples of two (pad 10px on each side). bounds.Width = 20 + ((((int)Math.Ceiling(bounds.Width)) + 1) & ~0x01); bounds.Height = 20 + ((((int)Math.Ceiling(bounds.Height)) + 1) & ~0x01); var currentTransformGroup = WorkspaceElements.RenderTransform as TransformGroup; WorkspaceElements.RenderTransform = new TranslateTransform(10.0 - bounds.X - minX, 10.0 - bounds.Y - minY); WorkspaceElements.UpdateLayout(); var rtb = new RenderTargetBitmap(((int)bounds.Width), ((int)bounds.Height), 96, 96, PixelFormats.Default); rtb.Render(WorkspaceElements); WorkspaceElements.RenderTransform = currentTransformGroup; try { using (var stm = System.IO.File.Create(path)) { // Encode as PNG format var pngEncoder = new PngBitmapEncoder(); pngEncoder.Frames.Add(BitmapFrame.Create(rtb)); pngEncoder.Save(stm); } } catch (Exception) { } }
internal void SaveWorkspaceAsImage(string path) { var initialized = false; var bounds = new Rect(); var dragCanvas = WpfUtilities.ChildOfType <DragCanvas>(this); var childrenCount = VisualTreeHelper.GetChildrenCount(dragCanvas); for (int index = 0; index < childrenCount; ++index) { var child = VisualTreeHelper.GetChild(dragCanvas, index); var firstChild = VisualTreeHelper.GetChild(child, 0); if ((!(firstChild is NodeView)) && (!(firstChild is NoteView)) && (!(firstChild is AnnotationView))) { continue; } var childBounds = VisualTreeHelper.GetDescendantBounds(child as Visual); childBounds.X = (double)(child as Visual).GetValue(Canvas.LeftProperty); childBounds.Y = (double)(child as Visual).GetValue(Canvas.TopProperty); if (initialized) { bounds.Union(childBounds); } else { initialized = true; bounds = childBounds; } } // Nothing found in the canvas, bail out. if (!initialized) { return; } // Add padding to the edge and make them multiples of two (pad 10px on each side). bounds.Width = 20 + ((((int)Math.Ceiling(bounds.Width)) + 1) & ~0x01); bounds.Height = 20 + ((((int)Math.Ceiling(bounds.Height)) + 1) & ~0x01); var currentTransformGroup = WorkspaceElements.RenderTransform as TransformGroup; WorkspaceElements.RenderTransform = new TranslateTransform(10.0 - bounds.X, 10.0 - bounds.Y); WorkspaceElements.UpdateLayout(); var rtb = new RenderTargetBitmap(((int)bounds.Width), ((int)bounds.Height), 96, 96, PixelFormats.Default); rtb.Render(WorkspaceElements); WorkspaceElements.RenderTransform = currentTransformGroup; try { using (var stm = System.IO.File.Create(path)) { // Encode as PNG format var pngEncoder = new PngBitmapEncoder(); pngEncoder.Frames.Add(BitmapFrame.Create(rtb)); pngEncoder.Save(stm); } } catch (Exception) { } }