/// <summary>
/// Fires the LayerMoved event.
/// </summary>
/// <param name="sender">The layer that was moved.</param>
/// <param name="e">LayerEventArgs.</param>
protected virtual void OnLayerMoved(object sender, LayerMovedEventArgs e)
{
if (EventsSuspended)
{
return;
}
LayerMoved?.Invoke(sender, e);
}
/// <summary>
/// Moves a layer from one point to another in the frame.
/// If the layer index and the new index are the same, nothing is done
/// </summary>
/// <param name="layerIndex">The index of the layer to swap</param>
/// <param name="newIndex">The index of the second layer to swap</param>
public void MoveLayer(int layerIndex, int newIndex)
{
if (layerIndex == newIndex)
{
return;
}
// Notify before event
BeforeLayerMoved?.Invoke(this, new LayerControllerLayerMovedEventArgs(layerIndex, newIndex));
// Move layer
if (layerIndex < newIndex)
{
// Move layer by swapping it until it is in the new desired place
for (int i = layerIndex; i < newIndex; i++)
{
_frame.SwapLayers(i, i + 1);
}
}
else if (layerIndex > newIndex)
{
// Move layer by swapping it until it is in the new desired place
for (int i = layerIndex; i > newIndex; i--)
{
_frame.SwapLayers(i, i - 1);
}
}
// Notify after event
LayerMoved?.Invoke(this, new LayerControllerLayerMovedEventArgs(layerIndex, newIndex));
// Update active layer index
if (ActiveLayerIndex == layerIndex)
{
ActiveLayerIndex = newIndex;
}
else if (ActiveLayerIndex == newIndex)
{
ActiveLayerIndex = layerIndex;
}
}
private void OnLayerMoved(ILayer layer)
{
LayerMoved?.Invoke(layer);
}
