CSharpGL.ArcBallManipulater.IMouseHandler C# (CSharp) Метод

        void IMouseHandler.canvas_MouseDown(object sender, MouseEventArgs e)
        {
            this.lastBindingMouseButtons = this.BindingMouseButtons;
            if ((e.Button & this.lastBindingMouseButtons) != MouseButtons.None)
            {
                var control = sender as Control;
                this.SetBounds(control.Width, control.Height);

                if (!cameraState.IsSameState(this.camera))
                {
                    SetCamera(this.camera.Position, this.camera.Target, this.camera.UpVector);
                }

                this._startPosition = GetArcBallPosition(e.X, e.Y);

                mouseDownFlag = true;
            }
        }