public LayerState MouseMovement(MyMouseEventArgs e)
{
LayerState result = LayerState.Normal;
bool canSelect = CanSelectLayer(e.Location);
if (canSelect)
{
result = LayerState.Selectable;
}
if (selectedLayer == StateHandler.DummySelected &&
canSelect == false)
{
return LayerState.Normal;
}
switch (StateHandler.SelectedLayerState)
{
case LayerState.Moving:
{
Rectangle oldRegion = selectedLayer.Region;
selectedLayer.Move(MoveTracker.GetDelta(e.Location));
// 2-step update: first on old region and then on the new one
//NotifyGraphicsHandler(RenderingPolicy.MinimalUpdatePolicy(oldRegion));
NotifyGraphicsHandler(RenderingPolicy.MinimalUpdatePolicy(selectedLayer.Region, oldRegion));
break;
}
case LayerState.Resizing:
{
Rectangle oldRegion = selectedLayer.Region;
selectedLayer.Resize((Size)MoveTracker.GetDelta(e.Location));
// Update the largest invalidated region
Rectangle invalidatedRegion = oldRegion.Contains(selectedLayer.Region)
? oldRegion
: selectedLayer.Region;
NotifyGraphicsHandler(RenderingPolicy.MinimalUpdatePolicy(invalidatedRegion));
break;
}
}
return result;
}
public void MouseUp(MyMouseEventArgs e)
{
if (StateHandler.SelectedLayerState != LayerState.Normal)
{
NotifyGraphicsHandler(RenderingPolicy.MinimalUpdatePolicy(selectedLayer.Region));
StateHandler.SelectedLayerState = LayerState.Normal;
}
}
public void MouseDown(MyMouseEventArgs e)
{
if (e.Button != MyMouseEventArgs.MyMouseButton.Left) return;
// Deselect all layers
if (CanSelectLayer(e.Location) == false)
{
DeselectLayers();
return;
}
// Keep track of initial mouse down
//pointDown = e.Location;
// Selection test at the mouse position
Layer layer;
if (CanSelectLayer(e.Location, out layer) == false) return;
// The exterior region is 4 pixels inside from the layer Edges
Rectangle resizeInterior = layer.Region;
resizeInterior.Inflate(-4, -4);
StateHandler.SelectedLayerState = resizeInterior.Contains(e.Location) ? LayerState.Moving : LayerState.Resizing;
// Logic to respond to the state change
if (StateHandler.SelectedLayerState == LayerState.Moving)
{
// Movement begin
MoveTracker.BeginTracking(e.Location, layer.Region.Location);
//pointOffset.X = pointDown.X - layer.Region.Left;
//pointOffset.Y = pointDown.Y - layer.Region.Top;
}
SelectedLayer = layer;
}
