C# MouseButtonEventArgs.ToMouseDownEventArgs方法代碼示例

        /// <summary>
        /// Invoked when an unhandled MouseDown attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.
        /// </summary>
        /// <param name="e">The <see cref="T:System.Windows.Input.MouseButtonEventArgs" /> that contains the event data. This event data reports details about the mouse button that was pressed and the handled state.</param>
        protected override void OnMouseDown(MouseButtonEventArgs e)
        {
            base.OnMouseDown(e);

            if (e.Handled)
            {
                return;
            }

            this.Focus();
            this.CaptureMouse();

            // store the mouse down point, check it when mouse button is released to determine if the context menu should be shown
            this.mouseDownPoint = e.GetPosition(this).ToScreenPoint();

            e.Handled = this.ActualController.HandleMouseDown(this, e.ToMouseDownEventArgs(this));
        }

        /// <summary>
        /// Called when a mouse button is pressed down.
        /// </summary>
        /// <param name="button">The button.</param>
        /// <param name="e">The <see cref="System.Windows.Input.MouseButtonEventArgs" /> instance containing the event data.</param>
        protected void OnMouseButtonDown(OxyMouseButton button, MouseButtonEventArgs e)
        {
            if (e.Handled)
            {
                return;
            }

            this.Focus();
            this.CaptureMouse();

            e.Handled = this.ActualController.HandleMouseDown(this, e.ToMouseDownEventArgs(button, this));
        }