private void Canvas_MouseMove(object sender, MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed || e.RightButton == MouseButtonState.Pressed)
{
int opacity = _drawing ? 1 : 0;
int factor = _drawing ? 1 : -1;
Brush fill = _drawing ? DrawColour : null;
LineSegment line = new LineSegment
{
X1 = _currentPoint.X,
Y1 = _currentPoint.Y,
X2 = e.GetPosition(this).X,
Y2 = e.GetPosition(this).Y
};
for (int row = 0; row < Rectangles.GetLength(0); row++)
{
for (int column = 0; column < Rectangles.GetLength(1); column++)
{
Rectangle rect = Rectangles[row, column];
double x = GetLeft(rect);
double y = GetTop(rect);
if (RectIntersectsLine(new Rect(x, y, rect.Width, rect.Height), line))
{
rect.Opacity = opacity;
rect.Fill = fill;
if (SoftDrawing)
{
UpdateNeighbours(GetNeighbours(Rectangles, row, column), factor, fill);
}
}
}
InputChangedEvent?.Invoke(this);
}
_currentPoint = e.GetPosition(this);
}
}