private void SetState(IPixmapSlicerState nextState)
{
this.stateControlToolStrip.SuspendLayout();
// Tear down old state
if (this.state != null)
{
this.state.OnStateLeaving(EventArgs.Empty);
// Unsubscribe from event handlers
this.state.StateEndRequested -= this.OnStateCancelled;
this.state.StateChangeRequested -= this.OnStateChangeRequested;
// Remove old states controls
foreach (ToolStripItem item in this.state.StateControls)
{
this.stateControlToolStrip.Items.Remove(item);
}
}
this.state = nextState;
this.state.View = this.pixmapView;
this.state.StateEndRequested += this.OnStateCancelled;
this.state.StateChangeRequested += this.OnStateChangeRequested;
// Add controls for the given state
if (this.state.StateControls != null && this.state.StateControls.Count > 0)
{
foreach (ToolStripItem item in this.state.StateControls)
{
this.stateControlToolStrip.Items.Add(item);
}
}
this.stateControlToolStrip.ResumeLayout();
this.UpdateIndicesButton();
this.pixmapView.Invalidate();
if (this.state != null)
{
this.state.OnStateEntered(EventArgs.Empty);
}
}
private void OnStateChangeRequested(object sender, PixmapSlicerStateEventArgs e)
{
IPixmapSlicerState newState = (IPixmapSlicerState)Activator.CreateInstance(e.StateType);
this.SetState(newState);
}
