public override Boolean OnTouchDown(Int32 touchId, Point point)
{
this.TouchId = touchId;
if (points.Count == 0)
{
this.drawingCanvas.AddWorkingDrawTool(this);
this.pen = this.drawingCanvas.Pen;
this.fontSize = this.drawingCanvas.FontSize;
this.typeface = new Typeface(new FontFamily("Microsoft YaHei UI,Tahoma"), FontStyles.Normal, FontWeights.Normal, FontStretches.Normal);
this.dpi = DpiHelper.GetDpiFromVisual(this.drawingCanvas);
points.Add(point);
geometry = new PathGeometry();
var figure = new PathFigure {
StartPoint = point
};
pathGeometry.Figures.Add(figure);
this.CanTouchMove = true;
if (this.TouchId != 0 || !this.drawingCanvas.CaptureMouse())
{
this.CanTouchLeave = true;
}
this.drawingCanvas.AddVisual(this);
}
else if ((point - points.Last()).Length <= pen.Thickness)
{
return(OnTouchLeave(point));
}
else if (mousePoint.HasValue)
{
points.Add(mousePoint.Value);
mousePoint = null;
}
return(true);
}
private void OnSaveImageClick(Object sender, RoutedEventArgs e)
{
var backgroundImage = this.drawViewer.BackgroundImage;
var frame = this.drawCanvas.ToBitmapFrame(backgroundImage.PixelWidth, backgroundImage.PixelHeight, DpiHelper.GetDpiFromVisual(this.drawCanvas), backgroundImage);
if (frame == null)
{
return;
}
var folder = Path.Combine(Environment.CurrentDirectory, "Images");
if (!Directory.Exists(folder))
{
Directory.CreateDirectory("Images");
}
var dlg = new SaveFileDialog
{
Filter = "Images files (*.jpg;*.jpeg;*.png;*.bmp)|*.jpg;*.jpeg;*.png;*.bmp",
OverwritePrompt = true,
DefaultExt = "jpg",
InitialDirectory = folder,
RestoreDirectory = true
};
if ((Boolean)dlg.ShowDialog())
{
ImageHelper.Save(dlg.FileName, frame);
}
}
private void OnPrintClick(Object sender, RoutedEventArgs e)
{
var backgroundImage = this.drawViewer.BackgroundImage;
this.drawCanvas.Print(backgroundImage.PixelWidth, backgroundImage.PixelHeight, DpiHelper.GetDpiFromVisual(this.drawCanvas), backgroundImage);
}