private void MainCanvas_MouseMove(object sender, MouseEventArgs e)
{
Canvas canvas = sender as Canvas;
if (canvas == null)
{
return;
}
Point currentMousePosition = e.GetPosition(canvas);
Point cartesianPosition = ConvertToCartesianCoords(MainCanvas, currentMousePosition);
lbMousePosition.Text = $"X: {cartesianPosition.X} Y:{cartesianPosition.Y}";
if (currentSelection.Any())
{
ICanvasObject currentLine = lines[lastClickedLine];
lbEquation.Text = $"Уравнение: {lastClickedLine.GetLineConstants()}";
float radius = 10;
bool isMouseNearBegin = Math.Pow(lastClickedLine.X1 - previousMousePosition.X, 2) + Math.Pow(lastClickedLine.Y1 - previousMousePosition.Y, 2) < Math.Pow(radius, 2);
bool isMouseNearEnd = Math.Pow(lastClickedLine.X2 - previousMousePosition.X, 2) + Math.Pow(lastClickedLine.Y2 - previousMousePosition.Y, 2) < Math.Pow(radius, 2);
if (isMouseNearBegin || isMouseNearEnd)
{
lastClickedLine.Cursor = Cursors.SizeNWSE;
}
else
{
lastClickedLine.Cursor = Cursors.SizeAll;
}
if (isMousePressed)
{
if (isMouseNearBegin)
{
lastClickedLine.X1 = currentMousePosition.X;
lastClickedLine.Y1 = currentMousePosition.Y;
}
else if (isMouseNearEnd)
{
lastClickedLine.X2 = currentMousePosition.X;
lastClickedLine.Y2 = currentMousePosition.Y;
}
else
{
Vector delta = previousMousePosition - currentMousePosition;
currentLine.Move(delta);
}
}
}
previousMousePosition = currentMousePosition;
}
