LayoutFarm.Demo_DragSelectionBox.OnStartDemo C# (CSharp) Method

        protected override void OnStartDemo(SampleViewport viewport)
        {
            this.viewport = viewport;
            this.rootgfx = viewport.ViewportControl.RootGfx;
            //--------------------------------

            bgbox = new LayoutFarm.CustomWidgets.SimpleBox(800, 600);
            bgbox.BackColor = Color.White;
            bgbox.SetLocation(0, 0);
            SetupBackgroundProperties(bgbox);
            viewport.AddContent(bgbox);
            //user box1
            var box1 = new LayoutFarm.CustomWidgets.SimpleBox(150, 150);
            box1.BackColor = Color.Red;
            box1.SetLocation(10, 10);
            SetupActiveBoxProperties(box1);
            bgbox.AddChild(box1);
            var box2 = new LayoutFarm.CustomWidgets.SimpleBox(60, 60);
            box2.BackColor = Color.Yellow;
            box2.SetLocation(50, 50);
            SetupActiveBoxProperties(box2);
            bgbox.AddChild(box2);
            var box3 = new LayoutFarm.CustomWidgets.SimpleBox(60, 60);
            box3.BackColor = Color.OrangeRed;
            box3.SetLocation(200, 80);
            SetupActiveBoxProperties(box3);
            bgbox.AddChild(box3);
            selectionBox = new UISelectionBox(1, 1);
            selectionBox.Visible = false;
            selectionBox.BackColor = Color.FromArgb(80, Color.Green);
            viewport.AddContent(selectionBox);
            SetupSelectionBoxProperties(selectionBox);
        }