public static void DrawUnstartedControlHelper(GLWpfControl control, DrawingContext drawingContext)
{
if (control.Visibility == Visibility.Visible && control.ActualWidth > 0 && control.ActualHeight > 0)
{
var width = control.ActualWidth;
var height = control.ActualHeight;
drawingContext.DrawRectangle(Brushes.Gray, null, new Rect(0, 0, width, height));
if (!Debugger.IsAttached) // Do not show the message if we're not debugging
{
return;
}
const string unstartedLabelText = "OpenGL content. Call Start() on the control to begin rendering.";
const int size = 12;
var tf = new Typeface("Arial");
#pragma warning disable 618
var ft = new FormattedText(unstartedLabelText, CultureInfo.InvariantCulture, FlowDirection.LeftToRight, tf, size, Brushes.White)
{
TextAlignment = TextAlignment.Left,
MaxTextWidth = width
};
#pragma warning restore 618
drawingContext.DrawText(ft, new Point(0, 0));
}
}
public static void DrawDesignTimeHelper(GLWpfControl control, DrawingContext drawingContext)
{
if (control.Visibility == Visibility.Visible && control.ActualWidth > 0 && control.ActualHeight > 0)
{
const string labelText = "GL WPF CONTROL";
var width = control.ActualWidth;
var height = control.ActualHeight;
var size = 1.5 * Math.Min(width, height) / labelText.Length;
var tf = new Typeface("Arial");
#pragma warning disable 618
var ft = new FormattedText(labelText, CultureInfo.InvariantCulture, FlowDirection.LeftToRight, tf, size, Brushes.White)
{
TextAlignment = TextAlignment.Center
};
#pragma warning restore 618
var redPen = new Pen(Brushes.DarkBlue, 2.0);
var rect = new Rect(1, 1, width - 1, height - 1);
drawingContext.DrawRectangle(Brushes.Black, redPen, rect);
drawingContext.DrawLine(new Pen(Brushes.DarkBlue, 2.0),
new Point(0.0, 0.0),
new Point(control.ActualWidth, control.ActualHeight));
drawingContext.DrawLine(new Pen(Brushes.DarkBlue, 2.0),
new Point(control.ActualWidth, 0.0),
new Point(0.0, control.ActualHeight));
drawingContext.DrawText(ft, new Point(width / 2, (height - ft.Height) / 2));
}
}