private void EditCanvas_MouseWheel(object sender, MouseWheelEventArgs e)
{
DesignerBaseCanvas it1 = sender as DesignerBaseCanvas;
if (it1 == null)
{
return;
}
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
IPagePropertyData page = this.DataContext as IPagePropertyData;
Rect selectWdgBounding = page.BoundingRect;
if (e.Delta > 0)
{
//ExternCanvas.
ScaleTransform scaletransform = ExternCanvasBorder.RenderTransform as ScaleTransform;
scaletransform.ScaleX = PageScaleEnumerator.GetValue(scaletransform.ScaleX, true);// Math.Min(1.7, scaletransform.ScaleX + 0.01);
double hOffset = (selectWdgBounding.Left + selectWdgBounding.Width / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualWidth / 2;
double vOffset = (selectWdgBounding.Top + selectWdgBounding.Height / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualHeight / 2;
DesignerScrollViewer.ScrollToHorizontalOffset(hOffset);
DesignerScrollViewer.ScrollToVerticalOffset(vOffset);
NLogger.Debug("e.Delta: " + e.Delta + " Scale: " + scaletransform.ScaleX + " view width: " + viewWidth + " view height: " + viewHeight + " horizontalOffset: " + hOffset + " verticalOffset:" + vOffset + " DesignerScrollViewer.ActualWidth:" + DesignerScrollViewer.ActualWidth);
}
else if (e.Delta < 0)
{
ScaleTransform scaletransform = ExternCanvasBorder.RenderTransform as ScaleTransform;
scaletransform.ScaleX = PageScaleEnumerator.GetValue(scaletransform.ScaleX, false); //Math.Max(0.3, scaletransform.ScaleX - 0.01);
//scaletransform.ScaleY = PageScaleEnumerator.GetValue(scaletransform.ScaleY, false); //Math.Max(0.3, scaletransform.ScaleY - 0.01);
double hOffset = (selectWdgBounding.Left + selectWdgBounding.Width / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualWidth / 2;
double vOffset = (selectWdgBounding.Top + selectWdgBounding.Height / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualHeight / 2;
DesignerScrollViewer.ScrollToHorizontalOffset(hOffset);
DesignerScrollViewer.ScrollToVerticalOffset(vOffset);
NLogger.Debug("e.Delta: " + e.Delta + " Scale: " + scaletransform.ScaleX + " view width: " + viewWidth + " view height: " + viewHeight + " horizontalOffset: " + hOffset + " verticalOffset:" + vOffset + " DesignerScrollViewer.ActualWidth:" + DesignerScrollViewer.ActualWidth);
}
e.Handled = true;
}
}
private void EditCanvas_MouseWheel(object sender, MouseWheelEventArgs e)
{
DesignerBaseCanvas it = sender as DesignerBaseCanvas;
if (it == null)
{
return;
}
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
IPagePropertyData page = this.DataContext as IPagePropertyData;
Rect selectWdgBounding = page.BoundingRect;
if (e.Delta > 0)
{
//ExternCanvas.
ScaleTransform scaletransform = ExternCanvasBorder.RenderTransform as ScaleTransform;
//scaletransform.ScaleX = Math.Min(1.7, scaletransform.ScaleX + 0.01);
//scaletransform.ScaleY = Math.Min(1.7, scaletransform.ScaleY + 0.01);
scaletransform.ScaleX = PageScaleEnumerator.GetValue(scaletransform.ScaleX, true);
DesignerScrollViewer.ScrollToHorizontalOffset((selectWdgBounding.Left + selectWdgBounding.Width / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualWidth / 2);
DesignerScrollViewer.ScrollToVerticalOffset((selectWdgBounding.Top + selectWdgBounding.Height / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualHeight / 2);
}
else if (e.Delta < 0)
{
ScaleTransform scaletransform = ExternCanvasBorder.RenderTransform as ScaleTransform;
//scaletransform.ScaleX = Math.Max(0.3, scaletransform.ScaleX - 0.01);
//scaletransform.ScaleY = Math.Max(0.3, scaletransform.ScaleY - 0.01);
scaletransform.ScaleX = PageScaleEnumerator.GetValue(scaletransform.ScaleX, false);
DesignerScrollViewer.ScrollToHorizontalOffset((selectWdgBounding.Left + selectWdgBounding.Width / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualWidth / 2);
DesignerScrollViewer.ScrollToVerticalOffset((selectWdgBounding.Top + selectWdgBounding.Height / 2) * scaletransform.ScaleX - DesignerScrollViewer.ActualHeight / 2);
}
e.Handled = true;
}
}
public bool ExportPage2Image()
{
Rect rec = GetPageActualSize();
if (rec.Height <= 0 || rec.Width <= 0)
{
return(false);
}
try
{
//render the canvas
RenderTargetBitmap bmp = new RenderTargetBitmap((int)rec.Width, (int)rec.Height, 96, 96, PixelFormats.Pbgra32);
DesignerBaseCanvas canvas = EditorCanvas as DesignerBaseCanvas;
if (canvas == null)
{
return(false);
}
canvas.UpdateLayout();
bmp.Render(canvas);
//show file save dialog
string imagFile = "";
SaveFileDialog saveFileDialog = new SaveFileDialog();
//saveFileDialog.Filter = "PNG File(*.png)|*.png|JPG File(*.jpg)|*.jpg|BMP File(*.bmp)|*.bmp|GIF File(*.gif)|*.gif|TIF File(*.tif)|*.tif";
saveFileDialog.Filter = "PNG File(*.png)|*.png";
saveFileDialog.FileName = this.Title;
if (saveFileDialog.ShowDialog() == true)
{
imagFile = saveFileDialog.FileName;
}
else
{
return(false);
}
//export image
string extensionString = Path.GetExtension(imagFile);
BitmapEncoder encoder = null;
switch (extensionString)
{
case ".jpg":
encoder = new JpegBitmapEncoder();
break;
case ".png":
encoder = new PngBitmapEncoder();
break;
case ".bmp":
encoder = new BmpBitmapEncoder();
break;
case ".gif":
encoder = new GifBitmapEncoder();
break;
case ".tif":
encoder = new TiffBitmapEncoder();
break;
default:
throw new InvalidOperationException();
}
encoder.Frames.Add(BitmapFrame.Create(bmp));
using (Stream stm = File.Create(imagFile))
{
encoder.Save(stm);
}
}
catch (Exception exp)
{
NLogger.Warn("Export page into a image : " + exp.Message);
return(false);
}
return(true);
}