protected virtual void OnMouseDown(object sender, MouseEventArgs e)
{
Mouse.Capture(EventSource, CaptureMode.Element);
_previousPosition2D = e.GetPosition(EventSource);
_previousPosition3D = ProjectToTrackball(
EventSource.ActualWidth,
EventSource.ActualHeight,
_previousPosition2D);
}
protected virtual void OnMouseMove(object sender, MouseEventArgs e)
{
Point currentPosition = e.GetPosition(EventSource);
bool ctrlOrShift = Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl) ||
Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.LeftShift);
// Prefer tracking to zooming if both buttons are pressed.
if (e.LeftButton == MouseButtonState.Pressed && !ctrlOrShift)
{
if (_mouseLeftDown)
{
Track(currentPosition);
}
else
{
_mouseLeftDown = true;
Mouse.Capture(EventSource, CaptureMode.Element);
_previousPosition2D = e.GetPosition(EventSource);
_previousPosition3D = ProjectToTrackball(
EventSource.ActualWidth,
EventSource.ActualHeight,
_previousPosition2D);
}
}
else if (e.RightButton == MouseButtonState.Pressed || (e.LeftButton == MouseButtonState.Pressed && ctrlOrShift))
{
if (_mouseRightDown)
{
//if (Zoom(currentPosition)) e.Handled = true;
Translate(currentPosition);
}
else
{
_mouseRightDown = true;
Mouse.Capture(EventSource, CaptureMode.Element);
_previousPosition2D = e.GetPosition(EventSource);
_previousPosition3D = ProjectToTrackball(
EventSource.ActualWidth,
EventSource.ActualHeight,
_previousPosition2D);
}
}
else
{
_mouseLeftDown = false;
_mouseRightDown = false;
}
_previousPosition2D = currentPosition;
}
protected virtual void OnMouseUp(object sender, MouseEventArgs e)
{
Mouse.Capture(EventSource, CaptureMode.None);
}
