/// <summary>
/// Event handler for the timeline control.MouseDownPicked event</summary>
/// <param name="sender">Timeline control that we are attached to</param>
/// <param name="e">Event args</param>
protected virtual void Owner_MouseDownPicked(object sender, HitEventArgs e)
{
HitRecord hitRecord = e.HitRecord;
TimelinePath hitObject = hitRecord.HitPath;
if (hitObject != null)
{
Keys modifiers = Control.ModifierKeys;
if (e.MouseEvent.Button == MouseButtons.Left)
{
if (modifiers == Keys.None && SelectionContext != null &&
SelectionContext.SelectionContains(hitObject))
{
// The hit object is already selected. Wait until the mouse up to see if there was
// a drag or not. If no drag, then set the selection set to be this one object.
m_mouseDownHitRecord = hitRecord;
m_mouseDownPos = e.MouseEvent.Location;
}
else if (modifiers == Keys.Control)
{
// Either this object is not already selected or Shift key is being held down.
// to be consistent with the Windows interface.
m_mouseDownHitRecord = hitRecord;
m_mouseDownPos = e.MouseEvent.Location;
}
else if ((modifiers & Keys.Alt) == 0)
{
// The 'Alt' key might mean something different. If no Alt key, we can update the
// selection immediately.
UpdateSelection(hitRecord, modifiers);
}
}
else if (e.MouseEvent.Button == MouseButtons.Right)
{
if (modifiers == Keys.None && SelectionContext != null &&
!SelectionContext.SelectionContains(hitObject))
{
// The hit object is not already selected and a right-click landed on it. Select it.
UpdateSelection(hitRecord, modifiers);
}
}
}
}
