/// <summary>
/// Handle mouse move.
/// Se cursor, move/resize, make group selection.
/// </summary>
public override void OnMouseMove(DrawingCanvas drawingCanvas, MouseEventArgs e)
{
// Exclude all cases except left button on/off.
if (e.MiddleButton == MouseButtonState.Pressed ||
e.RightButton == MouseButtonState.Pressed)
{
drawingCanvas.Cursor = HelperFunctions.DefaultCursor;
return;
}
Point point = e.GetPosition(drawingCanvas);
// Set cursor when left button is not pressed
if (e.LeftButton == MouseButtonState.Released)
{
Cursor cursor = null;
for (int i = 0; i < drawingCanvas.Count; i++)
{
int n = drawingCanvas[i].MakeHitTest(point);
if (n > 0)
{
cursor = drawingCanvas[i].GetHandleCursor(n);
break;
}
}
if (cursor == null)
{
cursor = HelperFunctions.DefaultCursor;
}
drawingCanvas.Cursor = cursor;
return;
}
if (!drawingCanvas.IsMouseCaptured)
{
return;
}
wasMove = true;
// Find difference between previous and current position
double dx = point.X - lastPoint.X;
double dy = point.Y - lastPoint.Y;
lastPoint = point;
// Resize
if (selectMode == SelectionMode.Size)
{
if (resizedObject != null)
{
resizedObject.MoveHandleTo(point, resizedObjectHandle);
}
}
// Move
if (selectMode == SelectionMode.Move)
{
foreach (GraphicsBase o in drawingCanvas.Selection)
{
o.Move(dx, dy);
}
}
// Group selection
if (selectMode == SelectionMode.GroupSelection)
{
// Resize selection rectangle
drawingCanvas[drawingCanvas.Count - 1].MoveHandleTo(
point, 5);
}
}
