private void TouchUp()
{
var left = (_canvasSize.Width - _mutableForeground.Width) / 2;
var top = (_canvasSize.Height - _mutableForeground.Height) / 2;
if (_currentStroke.IsEmpty)
{
_strokeBrush.SetStyle(Paint.Style.Fill);
ForegroundMutator.DrawCircle((float)(_currentTouch.X - left), (float)(_currentTouch.Y - top), (float)StrokeThickness / 2, _strokeBrush);
}
else
{
_currentStroke.LineTo((float)_currentTouch.X, (float)_currentTouch.Y);
// Commit the path to our offscreen canvas
var m = new Matrix();
m.SetTranslate((float)-left, (float)-top);
_currentStroke.Transform(m);
ForegroundMutator.DrawPath(_currentStroke, _strokeBrush);
}
// Reset the stroke so that it is not redrawn in OnDraw.
_currentStroke.Reset();
}
protected override void OnSizeChanged(int w, int h, int oldw, int oldh)
{
base.OnSizeChanged(w, h, oldw, oldh);
_canvasSize = new Size(w, h);
Bitmap foreground = null;
try
{
var view = DroidFactory.MainActivity.FindViewById <ImageView>(((FragmentHistoryStack)((BaseFragment)Parent).Stack).BackgroundId);
if (view == null)
{
return;
}
if (_backgroundPath != null && _backgroundImage == null)
{
SetBackground(ImageGetter.LoadFromStorage(_backgroundPath, view.MeasuredWidth, view.MeasuredHeight));
}
if (_foregroundPath != null)
{
foreground = ImageGetter.LoadFromStorage(_foregroundPath, view.MeasuredWidth, view.MeasuredHeight);
SetForeground(null);
_foregroundPath = null;
}
else
{
foreground = _mutableForeground;
SetForeground(Bitmap.CreateBitmap((int)_canvasSize.Width, (int)_canvasSize.Height, Bitmap.Config.Argb8888));
this.OnPropertyChanged("MutableForeground");
}
}
catch (Exception ex)
{
iApp.Log.Error(ex);
}
if (foreground == null)
{
return;
}
var foregroundWidth = foreground.Width;
var foregroundHeight = foreground.Height;
var scaled = false;
if (foregroundWidth > _canvasSize.Width)
{
foregroundHeight = (int)(foregroundHeight * (_canvasSize.Width / foregroundWidth));
foregroundWidth = (int)_canvasSize.Width;
scaled = true;
}
if (foregroundHeight > _canvasSize.Height)
{
foregroundWidth = (int)(foregroundWidth * (_canvasSize.Height / foregroundHeight));
foregroundHeight = (int)_canvasSize.Height;
scaled = true;
}
if (scaled)
{
var fore = foreground;
foreground = Bitmap.CreateScaledBitmap(foreground, foregroundWidth, foregroundHeight, false);
fore.Recycle();
}
var left = foregroundWidth > _canvasSize.Width ? 0 : ((float)_canvasSize.Width - foregroundWidth) / 2;
var top = foregroundHeight > _canvasSize.Height ? 0 : ((float)_canvasSize.Height - foregroundHeight) / 2;
ForegroundMutator.DrawBitmap(foreground, left, top, _bitmapPaint);
Recycle(foreground);
}
