UnityEditor.DopeSheetEditorRectangleTool.Initialize C# (CSharp) Method

        public override void Initialize(TimeArea timeArea)
        {
            base.Initialize(timeArea);
            this.m_DopeSheetEditor = timeArea as DopeSheetEditor;
            this.m_State = this.m_DopeSheetEditor.state;
            if (this.m_SelectionBoxes == null)
            {
                this.m_SelectionBoxes = new AreaManipulator[2];
                for (int i = 0; i < 2; i++)
                {
                    this.m_SelectionBoxes[i] = new AreaManipulator(base.styles.rectangleToolSelection, MouseCursor.MoveArrow);
                    AreaManipulator manipulator1 = this.m_SelectionBoxes[i];
                    manipulator1.onStartDrag = (AnimationWindowManipulator.OnStartDragDelegate) Delegate.Combine(manipulator1.onStartDrag, delegate (AnimationWindowManipulator manipulator, Event evt) {
                        if ((!(evt.shift || EditorGUI.actionKey) && this.hasSelection) && manipulator.rect.Contains(evt.mousePosition))
                        {
                            this.OnStartMove(new Vector2(base.PixelToTime(evt.mousePosition.x, this.frameRate), 0f), base.rippleTimeClutch);
                            return true;
                        }
                        return false;
                    });
                    AreaManipulator manipulator2 = this.m_SelectionBoxes[i];
                    manipulator2.onDrag = (AnimationWindowManipulator.OnDragDelegate) Delegate.Combine(manipulator2.onDrag, delegate (AnimationWindowManipulator manipulator, Event evt) {
                        this.OnMove(new Vector2(base.PixelToTime(evt.mousePosition.x, this.frameRate), 0f));
                        return true;
                    });
                    AreaManipulator manipulator3 = this.m_SelectionBoxes[i];
                    manipulator3.onEndDrag = (AnimationWindowManipulator.OnEndDragDelegate) Delegate.Combine(manipulator3.onEndDrag, delegate (AnimationWindowManipulator manipulator, Event evt) {
                        this.OnEndMove();
                        return true;
                    });
                }
            }
            if (this.m_SelectionScaleLeft == null)
            {
                this.m_SelectionScaleLeft = new AreaManipulator(base.styles.dopesheetScaleLeft, MouseCursor.ResizeHorizontal);
                this.m_SelectionScaleLeft.onStartDrag = (AnimationWindowManipulator.OnStartDragDelegate) Delegate.Combine(this.m_SelectionScaleLeft.onStartDrag, delegate (AnimationWindowManipulator manipulator, Event evt) {
                    if (this.hasSelection && manipulator.rect.Contains(evt.mousePosition))
                    {
                        this.OnStartScale(RectangleTool.ToolCoord.Right, RectangleTool.ToolCoord.Left, new Vector2(base.PixelToTime(evt.mousePosition.x, this.frameRate), 0f), base.rippleTimeClutch);
                        return true;
                    }
                    return false;
                });
                this.m_SelectionScaleLeft.onDrag = (AnimationWindowManipulator.OnDragDelegate) Delegate.Combine(this.m_SelectionScaleLeft.onDrag, delegate (AnimationWindowManipulator manipulator, Event evt) {
                    this.OnScaleTime(base.PixelToTime(evt.mousePosition.x, this.frameRate));
                    return true;
                });
                this.m_SelectionScaleLeft.onEndDrag = (AnimationWindowManipulator.OnEndDragDelegate) Delegate.Combine(this.m_SelectionScaleLeft.onEndDrag, delegate (AnimationWindowManipulator manipulator, Event evt) {
                    this.OnEndScale();
                    return true;
                });
            }
            if (this.m_SelectionScaleRight == null)
            {
                this.m_SelectionScaleRight = new AreaManipulator(base.styles.dopesheetScaleRight, MouseCursor.ResizeHorizontal);
                this.m_SelectionScaleRight.onStartDrag = (AnimationWindowManipulator.OnStartDragDelegate) Delegate.Combine(this.m_SelectionScaleRight.onStartDrag, delegate (AnimationWindowManipulator manipulator, Event evt) {
                    if (this.hasSelection && manipulator.rect.Contains(evt.mousePosition))
                    {
                        this.OnStartScale(RectangleTool.ToolCoord.Left, RectangleTool.ToolCoord.Right, new Vector2(base.PixelToTime(evt.mousePosition.x, this.frameRate), 0f), base.rippleTimeClutch);
                        return true;
                    }
                    return false;
                });
                this.m_SelectionScaleRight.onDrag = (AnimationWindowManipulator.OnDragDelegate) Delegate.Combine(this.m_SelectionScaleRight.onDrag, delegate (AnimationWindowManipulator manipulator, Event evt) {
                    this.OnScaleTime(base.PixelToTime(evt.mousePosition.x, this.frameRate));
                    return true;
                });
                this.m_SelectionScaleRight.onEndDrag = (AnimationWindowManipulator.OnEndDragDelegate) Delegate.Combine(this.m_SelectionScaleRight.onEndDrag, delegate (AnimationWindowManipulator manipulator, Event evt) {
                    this.OnEndScale();
                    return true;
                });
            }
        }