public static void PrintWithDPI(GraphAreaBase visual, string description, double dpi, int margin = 0)
{
var pd = new PrintDialog();
if (pd.ShowDialog() == true)
{
visual.SetPrintMode(true, true, margin);
//store original scale
var originalScale = visual.LayoutTransform;
//get scale from DPI
var scale = dpi / DEFAULT_DPI;
//Transform the Visual to scale
var group = new TransformGroup();
group.Children.Add(new ScaleTransform(scale, scale));
visual.LayoutTransform = group;
//update visual
visual.InvalidateArrange();
visual.UpdateLayout();
//now print the visual to printer to fit on the one page.
pd.PrintVisual(visual, description);
//apply the original transform.
visual.LayoutTransform = originalScale;
visual.SetPrintMode(false, true, margin);
}
}
public static void PrintToFit(GraphAreaBase visual, string description, int margin = 0)
{
var pd = new PrintDialog();
if (pd.ShowDialog() == true)
{
visual.SetPrintMode(true, true, margin);
//store original scale
var originalScale = visual.LayoutTransform;
//get selected printer capabilities
var capabilities = pd.PrintQueue.GetPrintCapabilities(pd.PrintTicket);
//get scale of the print wrt to screen of WPF visual
var scale = Math.Min(capabilities.PageImageableArea.ExtentWidth / visual.ActualWidth, capabilities.PageImageableArea.ExtentHeight /
visual.ActualHeight);
//Transform the Visual to scale
var group = new TransformGroup();
group.Children.Add(new ScaleTransform(scale, scale));
visual.LayoutTransform = group;
visual.InvalidateArrange();
visual.UpdateLayout();
//now print the visual to printer to fit on the one page.
pd.PrintVisual(visual, description);
//apply the original transform.
visual.LayoutTransform = originalScale;
visual.SetPrintMode(false, true, margin);
}
}