private void OnStrokeCollected(InkPresenter sender, InkStrokesCollectedEventArgs args)
{
var list = _inkSynchronizer.BeginDry();
StrokeCollected?.Invoke(this, list);
_inkSynchronizer.EndDry();
}
private void canvasControl_Draw(CanvasControl sender, CanvasDrawEventArgs args)
{
if (needToCreateSizeDepdendentResources)
{
CreateSizeDependentResources();
}
if (needsClear || needsInkSurfaceValidation)
{
ClearInkSurface();
}
if (needsInkSurfaceValidation)
{
DrawStrokeCollectionToInkSurface(strokeList);
}
needToCreateSizeDepdendentResources = false;
needsClear = false;
needsInkSurfaceValidation = false;
DrawBackgroundText(args.DrawingSession);
var strokes = inkSynchronizer.BeginDry();
DrawStrokeCollectionToInkSurface(strokes); // Incremental draw only.
inkSynchronizer.EndDry();
args.DrawingSession.DrawImage(renderTarget);
DrawForegroundText(args.DrawingSession);
DrawSelectionBoundingRect(args.DrawingSession);
DrawSelectionLasso(sender, args.DrawingSession);
}
private void canvasControl_Draw(CanvasControl sender, CanvasDrawEventArgs args)
{
if (needToCreateSizeDependentResources)
{
CreateSizeDependentResources();
}
if (needToRedrawInkSurface)
{
ClearInkSurface();
DrawStrokeCollectionToInkSurface(inkManager.GetStrokes());
needToRedrawInkSurface = false;
}
DrawBackgroundText(args.DrawingSession);
if (pendingDry != null && deferredDryDelay == 0)
{
// Incremental draw only.
DrawStrokeCollectionToInkSurface(pendingDry);
// We want to transition from displaying wet ink to our newly drawn dry ink with minimum possible risk of flicker.
// If the ink is opaque, the safest approach is to delay calling EndDry for a couple of frames, deferring it via
// the CompositionTarget.Rendering event. This will usually briefly overlap the wet and dry ink, which looks fine
// for regular pen strokes but not for pencil or highlighter rendering. When using such non-opaque drawing modes,
// we must call EndDry immediately to minimize risk of any overlap.
if (usePencil)
{
inkSynchronizer.EndDry();
pendingDry = null;
}
else
{
// Register to call EndDry on the next-but-one draw,
// by which time our dry ink will be visible.
deferredDryDelay = 1;
CompositionTarget.Rendering += DeferredEndDry;
}
}
args.DrawingSession.DrawImage(renderTarget);
DrawForegroundText(args.DrawingSession);
DrawSelectionBoundingRect(args.DrawingSession);
DrawSelectionLasso(sender, args.DrawingSession);
}
private void InkPresenter_StrokesCollected(InkPresenter sender, InkStrokesCollectedEventArgs args)
{
var strokes = _synch.BeginDry();
RenderStrokes(strokes);
_synch.EndDry();
}
private void ProcessPendingInk()
{
if (_pendingDry != null)
{
_inkSync.EndDry();
_pendingDry = null;
}
}
private void CompositionTarget_Rendering(object sender, object e)
{
if (deferredDryDelay > 0)
{
deferredDryDelay--;
}
else
{
CompositionTarget.Rendering -= CompositionTarget_Rendering;
pendingDry = null;
inkSynchronizer.EndDry();
}
}
private void InkPresenter_StrokesCollected(InkPresenter sender, InkStrokesCollectedEventArgs args)
{
var strokes = _inkSynchronizer.BeginDry();
var container = new InkStrokeContainer();
container.AddStrokes(from item in strokes
select item.Clone());
_inkStrokes.Add(container);
history.Push(_inkStrokes);
_inkSynchronizer.EndDry();
DrawingCanvas.Invalidate();
}
private void DeferredEndDry(object sender, object e)
{
Debug.Assert(pendingDry != null);
if (deferredDryDelay > 0)
{
deferredDryDelay--;
}
else
{
CompositionTarget.Rendering -= DeferredEndDry;
pendingDry = null;
inkSynchronizer.EndDry();
}
}
private void InkPresenter_StrokesCollected(InkPresenter sender, InkStrokesCollectedEventArgs args)
{
// Custom drying
var strokes = _inkSynchronizer.BeginDry();
var container = new InkStrokeContainer();
var clonedStrokes = from item in strokes select item.Clone();
container.AddStrokes(clonedStrokes);
viewModel.AddStroke(container);
_inkSynchronizer.EndDry();
drawingCanvas.Invalidate();
if (inkToShapeButton.IsChecked.Value) // Store a copy of the strokes for recognition if button is checked
{
viewModel.RecognizeStrokes(clonedStrokes);
}
else
{
viewModel.StopRecognizingStrokes();
}
}