private void RegisterMessenger()
{
Messenger.Default.Register <List <Rectangle> >(this, MessageKey.InitRects, data =>
{
//Parallel.For(0, data.Count, ii => this.Dispatcher.InvokeAsync(() =>
//{
// this.cans.Children.Add(data[ii]);
// DragControlHelper.SetIsEditable(data[ii], true);
// DragControlHelper.SetIsSelectable(data[ii], true);
//}));
foreach (var item in data)
{
this.Dispatcher.InvokeAsync(() =>
{
item.MouseEnter += (sender, e) => (sender as Rectangle).StrokeThickness = 7;
item.MouseLeave += (sender, e) => (sender as Rectangle).StrokeThickness = 3;
this.cans.Children.Add(item);
DragControlHelper.SetIsEditable(item, true);
DragControlHelper.SetIsSelectable(item, true);
});
}
});
Messenger.Default.Register <bool>(this, MessageKey.IsSelected, data =>
{
_isSelected = data;
});
Messenger.Default.Register <Rectangle>(this, MessageKey.DeleteSelectedRect, data =>
{
this.cans.Children.Remove(data);
});
}
private void cans_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
if (_isSelected)
{
return;
}
//var x = VisualTreeHelper.HitTest(this.cans, e.GetPosition(this.cans));
// 右键绘制
if (e.ChangedButton == MouseButton.Right && e.RightButton == MouseButtonState.Pressed && e.ClickCount == 1)
{
//if (!_isDrawStart)
//{
// return;
//}
_isDrawing = true;
_point = e.GetPosition(this.cans);
Rectangle = new Rectangle {
Stroke = new SolidColorBrush(Colors.Blue), StrokeThickness = 3, Tag = Guid.NewGuid().ToString()
};
DragControlHelper.SetIsEditable(Rectangle, true);
DragControlHelper.SetIsSelectable(Rectangle, true);
this.cans.Children.Add(Rectangle);
Canvas.SetLeft(Rectangle, _point.X);
Canvas.SetTop(Rectangle, _point.Y);
}
}
private void InitDraggableBorder(DraggableBorder draggableBorder, int index)
{
draggableBorder.Index = index;
draggableBorder.MyDragEvent += draggableBorder_MyDragEvent;
draggableBorder.MyMouseLeftButtonDown += draggableBorder_MyMouseLeftButtonDown;
draggableBorder.MyMouseLeftButtonUp += draggableBorder_MyMouseLeftButtonUp;
draggableBorder.MyMouseDownClick += draggableBorder_MyMouseDownClick;
//添加右键菜单
ContextMenu contextMenu = new ContextMenu();
MenuItem deleteMenuItem = new MenuItem();
deleteMenuItem.Header = "删除";
deleteMenuItem.Click += (sender1, e1) =>
{
Canvas parentCanvas = draggableBorder.Parent as Canvas;
if (parentCanvas.Children.Contains(draggableBorder))
{
parentCanvas.Children.Remove(draggableBorder);
if (this.canvasBorderList.Contains(draggableBorder))
{
this.canvasBorderList.Remove(draggableBorder);
}
if (this.boardKeyCodes.ContainsKey(draggableBorder.KeyCode))
{
this.boardKeyCodes.Remove(draggableBorder.KeyCode);
}
}
};
contextMenu.Items.Add(deleteMenuItem);
MenuItem resizeMenuItem = new MenuItem();
resizeMenuItem.Header = "设置大小";
resizeMenuItem.Click += (sender1, e1) =>
{
//设置属性
DragControlHelper.SetIsEditable(draggableBorder, true); //允许编辑
DragControlHelper.SetIsSelectable(draggableBorder, true); //允许选中
DragControlHelper.SetIsAutoResetES(draggableBorder, true); //焦点回到Canvas取消编辑状态
//引发TargetElementChanged事件
this.PreviewCanvas.Focus();
this.UICommon_DragControlHelper.TargetElement = draggableBorder;
draggableBorder.Focus();
};
contextMenu.Items.Add(resizeMenuItem);
draggableBorder.ContextMenu = contextMenu;
Canvas.SetZIndex(draggableBorder, 0);
}