Canguro.Controller.Controller.scenePanel_MouseUp C# (CSharp) Method

        void scenePanel_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            System.Diagnostics.Debug.Assert(mainFrm != null);
            if (viewCmd != null)
            {
                GraphicView gv = GraphicViewManager.Instance.ActiveView;
                bool windowSelectionOn = SelectionCommand.WindowSelectionOn;

                viewCmd.ButtonUp(gv, e);
                mainFrm.ScenePanel.Capture = false;

                // Check if its time to end current ViewCommand
                if (e.Button == System.Windows.Forms.MouseButtons.Right || e.Button == MouseButtons.Middle)
                {
                    if ((viewCmd != SelectionCommand || gv.ModelRenderer.RenderOptions.ShowAnimated) && EndViewCommand != null)
                        EndViewCommand(this, new EndViewCommandArgs(viewCmd));
                    else if (!SelectionCommand.IsWorkingAsCommandService)
                    {
                        if (!windowSelectionOn)
                            Canguro.Model.Model.Instance.UnSelectAll();
                    }

                    viewCmd = SelectionCommand;

                    if (StartViewCommand != null)
                        StartViewCommand(this, EventArgs.Empty);
                    mainFrm.ScenePanel.Cursor = SelectionCommand.Cursor;
                }

                if (e.Button == MouseButtons.Middle && lastViewCmd != null)
                {
                    if (lastViewCmd == Commands.View.Trackball3D.Instance)
                        Execute("rotate");
                    else if (lastViewCmd == Commands.View.Pan.Instance)
                        Execute("pan");
                    else if (lastViewCmd == Commands.View.ZoomInteractive.Instance)
                        Execute("zoom");

                    lastViewCmd = null;
                }

                if (viewCmd == SelectionCommand)
                    GraphicViewManager.Instance.UpdateView(gv);
            }
        }