コード例 #1
0
ファイル: DragDropHelper.cs プロジェクト: EdAllonby/GrooveBox
        private void AdornerMouseUp(object sender, MouseEventArgs e)
        {
            switch (adorner.AdornerDropState)
            {
            case DropState.CanDrop:
                DropElement();
                break;

            case DropState.CannotDrop:
                DoNotDropElement();
                break;
            }

            lastDraggedElement             = null;
            adornerLayer.PreviewMouseMove -= AdornerMouseMove;
            adornerLayer.PreviewMouseUp   -= AdornerMouseUp;

            if (adorner != null)
            {
                adorner.ReleaseMouseCapture();
            }

            adorner       = null;
            mouseCaptured = false;
        }
コード例 #2
0
ファイル: DragDropHelper.cs プロジェクト: EdAllonby/GrooveBox
        // Drag = mouse down + move by a certain amount
        private void OnDragSourcePreviewMouseMove(object sender, MouseEventArgs e)
        {
            if (!mouseCaptured && lastDraggedElement != null)
            {
                // Only drag when user moved the mouse by a reasonable amount.
                if (IsMovementBigEnough(initialMousePosition, e.GetPosition(topWindow)))
                {
                    adorner             = (DragDropAdorner)GetDragDropControl(sender as DependencyObject);
                    adorner.DataContext = lastDraggedElement.DataContext;
                    adorner.Opacity     = 0.7;

                    adornerLayer.Visibility = Visibility.Visible;
                    adornerLayer.Children.Add(adorner);
                    mouseCaptured = Mouse.Capture(adorner);

                    Canvas.SetLeft(adorner, initialMousePosition.X - 20);
                    Canvas.SetTop(adorner, initialMousePosition.Y - 15);

                    adornerLayer.PreviewMouseMove += AdornerMouseMove;
                    adornerLayer.PreviewMouseUp   += AdornerMouseUp;
                }
            }
        }
コード例 #3
0
        /// <summary>
        /// Make a <see cref="DependencyObject" /> draggable.
        /// </summary>
        /// <param name="dependencyObject">The object to make draggable</param>
        /// <param name="dropTargets">The drop targets names.</param>
        /// <param name="dragDropAdorner">The drag drop adorner implementation to use.</param>
        /// <param name="adornerLayerName">The adorner view layer.</param>
        public static void MakeObjectDraggable(DependencyObject dependencyObject, IEnumerable <string> dropTargets, DragDropAdorner dragDropAdorner, string adornerLayerName)
        {
            string targets = string.Join(",", dropTargets);

            dependencyObject.SetValue(DragDropHelper.IsDragSourceProperty, true);
            dependencyObject.SetValue(DragDropHelper.DropTargetsProperty, targets);
            dependencyObject.SetValue(DragDropHelper.AdornerLayerProperty, adornerLayerName);
            dependencyObject.SetValue(DragDropHelper.DragDropControlProperty, dragDropAdorner);
        }
コード例 #4
0
        private static void DropStateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            DragDropAdorner myclass = (DragDropAdorner)d;

            myclass.StateChangedHandler(d, e);
        }