private void CanvasPanel_MouseMove(object sender, MouseEventArgs e)
{
if (_isMouseDown)
{
var x = Mouse.GetPosition(CanvasPanel).X;
var y = Mouse.GetPosition(CanvasPanel).Y;
if (x >= _ellipseHalfWidth && x <= CanvasImage.Width - _ellipseHalfWidth - 1 && y >= _ellipseHalfHeight && y <= CanvasImage.Height - _ellipseHalfHeight - 1)
{
try
{
var croppedBitmap = new CroppedBitmap(ColorImage.Source as BitmapSource, new Int32Rect(Convert.ToInt32(x), Convert.ToInt32(y), 1, 1));
var pixels = new byte[4];
croppedBitmap.CopyPixels(pixels, 4, 0);
SelectedColor = Color.FromArgb(255, pixels[2], pixels[1], pixels[0]);
MoveEllipse(x, y, SelectedColor);
UpdateTextBox();
ColorRectangle.Fill = new SolidColorBrush(SelectedColor);
}
catch (Exception)
{
_isMouseDown = false;
SetColor(Colors.White);
}
finally
{
CanvasImage.InvalidateVisual();
}
}
else
{
_isMouseDown = false;
}
}
}