private DrawingImage RenderLayers()
{
var renderLayers = GetRenderLayers();
// Draw the current frame to the preview
var keyboardRect = _deviceManager.ActiveKeyboard.KeyboardRectangle();
var visual = new DrawingVisual();
using (var drawingContext = visual.RenderOpen())
{
// Setup the DrawingVisual's size
drawingContext.PushClip(new RectangleGeometry(keyboardRect));
drawingContext.DrawRectangle(new SolidColorBrush(Color.FromArgb(0, 0, 0, 0)), null, keyboardRect);
// Draw the layers
foreach (var layer in renderLayers)
{
layer.Update(null, true, false);
if (layer.LayerType.ShowInEdtor)
{
layer.Draw(null, drawingContext, true, false);
}
}
// Get the selection color
var accentColor = ThemeManager.DetectAppStyle(Application.Current)?.Item2?.Resources["AccentColor"];
if (accentColor == null)
{
var preview = new DrawingImage();
preview.Freeze();
KeyboardPreview = preview;
return(new DrawingImage());
}
var pen = new Pen(new SolidColorBrush((Color)accentColor), 0.4);
// Draw the selection outline and resize indicator
if (SelectedLayer != null && SelectedLayer.MustDraw())
{
var layerRect = SelectedLayer.Properties.PropertiesRect();
// Deflate the rect so that the border is drawn on the inside
layerRect.Inflate(-0.2, -0.2);
// Draw an outline around the selected layer
drawingContext.DrawRectangle(null, pen, layerRect);
// Draw a resize indicator in the bottom-right
drawingContext.DrawLine(pen,
new Point(layerRect.BottomRight.X - 1, layerRect.BottomRight.Y - 0.5),
new Point(layerRect.BottomRight.X - 1.2, layerRect.BottomRight.Y - 0.7));
drawingContext.DrawLine(pen,
new Point(layerRect.BottomRight.X - 0.5, layerRect.BottomRight.Y - 1),
new Point(layerRect.BottomRight.X - 0.7, layerRect.BottomRight.Y - 1.2));
drawingContext.DrawLine(pen,
new Point(layerRect.BottomRight.X - 0.5, layerRect.BottomRight.Y - 0.5),
new Point(layerRect.BottomRight.X - 0.7, layerRect.BottomRight.Y - 0.7));
}
SelectedProfile?.RaiseDeviceDrawnEvent(new ProfileDeviceEventsArg(DrawType.Preview, null, true,
drawingContext));
// Remove the clip
drawingContext.Pop();
}
var drawnPreview = new DrawingImage(visual.Drawing);
drawnPreview.Freeze();
// Setup layers for the next frame
if (_moduleModel.IsInitialized && ActiveWindowHelper.MainWindowActive)
{
_moduleModel.PreviewLayers = renderLayers;
}
return(drawnPreview);
}