public override void OnMouseDown(PointD3D position, MouseButtonEventArgs e)
{
base.OnMouseDown(position, e);
if (e.ChangedButton == MouseButton.Left)
{
var hitData = new HitTestPointData(_grac.Doc.Camera.GetHitRayMatrix(position));
// first, if we have a mousedown without shift key and the
// position has changed with respect to the last mousedown
// we have to deselect all objects
var keyboardModifiers = System.Windows.Input.Keyboard.Modifiers;
bool bControlKey = keyboardModifiers.HasFlag(ModifierKeys.Control);
bool bShiftKey = keyboardModifiers.HasFlag(ModifierKeys.Shift);
ActiveGrip = GripHitTest(hitData);
if ((ActiveGrip is SuperGrip) && (bShiftKey || bControlKey))
{
var superGrip = ActiveGrip as SuperGrip;
if (superGrip.GetHittedElement(hitData, out var gripHandle, out var hitTestObj))
{
_selectedObjects.Remove(hitTestObj);
superGrip.Remove(gripHandle);
return;
}
}
else if (ActiveGrip != null)
{
ActiveGrip.Activate(hitData, false);
return;
}
_grac.FindGraphObjectAtPixelPosition(hitData, false, out var clickedObject, out var clickedLayerNumber);
if (!bShiftKey && !bControlKey) // if shift or control are pressed, we add the object to the selection list and start moving mode
{
ClearSelections();
}
if (null != clickedObject)
{
AddSelectedObject(hitData, clickedObject);
}
}
}
