void ResizeThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
DesignerItem designerItem = this.DataContext as DesignerItem;
MyCanvas designer = VisualTreeHelper.GetParent(designerItem) as MyCanvas;
if (designerItem != null && designer != null && designerItem.IsSelected)
{
double minLeft, minTop, minDeltaHorizontal, minDeltaVertical;
double dragDeltaVertical, dragDeltaHorizontal;
var selectedDesignerItems = from item in designer.SelectedItems
where item is DesignerItem
select item;
CalculateDragLimits(selectedDesignerItems, out minLeft, out minTop,
out minDeltaHorizontal, out minDeltaVertical);
foreach (DesignerItem item in selectedDesignerItems)
{
if (item != null)
{
switch (base.VerticalAlignment)
{
case VerticalAlignment.Bottom:
dragDeltaVertical = Math.Min(-e.VerticalChange, minDeltaVertical);
item.Height = item.ActualHeight - dragDeltaVertical;
break;
case VerticalAlignment.Top:
double top = Canvas.GetTop(item);
dragDeltaVertical = Math.Min(Math.Max(-minTop, e.VerticalChange), minDeltaVertical);
Canvas.SetTop(item, top + dragDeltaVertical);
item.Height = item.ActualHeight - dragDeltaVertical;
break;
default:
break;
}
switch (base.HorizontalAlignment)
{
case HorizontalAlignment.Left:
double left = Canvas.GetLeft(item);
dragDeltaHorizontal = Math.Min(Math.Max(-minLeft, e.HorizontalChange), minDeltaHorizontal);
Canvas.SetLeft(item, left + dragDeltaHorizontal);
item.Width = item.ActualWidth - dragDeltaHorizontal;
break;
case HorizontalAlignment.Right:
dragDeltaHorizontal = Math.Min(-e.HorizontalChange, minDeltaHorizontal);
item.Width = item.ActualWidth - dragDeltaHorizontal;
break;
default:
break;
}
}
}
e.Handled = true;
}
}
/// <summary>
/// 鼠标移动事件
/// </summary>
/// <param name="e"></param>
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (e.LeftButton != MouseButtonState.Pressed)
{
this.dragStartPoint = null;
}
if (this.dragStartPoint.HasValue)
{
//创建连接装饰器
MyCanvas canvas = GetDesignerCanvas(this);
if (canvas != null)
{
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(canvas);
if (adornerLayer != null)
{
ConnectorAdorner adorner = new ConnectorAdorner(canvas, this);
if (adorner != null)
{
adornerLayer.Add(adorner);
e.Handled = true;
}
}
}
}
}
/// <summary>
/// 鼠标单击的事件
/// </summary>
/// <param name="e"></param>
protected override void OnMouseDown(System.Windows.Input.MouseButtonEventArgs e)
{
base.OnMouseDown(e);
MyCanvas designer = VisualTreeHelper.GetParent(this) as MyCanvas;
// designer.Focus();
if (designer != null)
{
if ((Keyboard.Modifiers & (ModifierKeys.Shift | ModifierKeys.Control)) != ModifierKeys.None)
{
if (this.IsSelected)
{
this.IsSelected = false;
designer.SelectedItems.Remove(this);
}
else
{
this.IsSelected = true;
designer.SelectedItems.Add(this);
}
}
else if (!this.IsSelected)
{
foreach (ISelectable item in designer.SelectedItems)
{
item.IsSelected = false;
}
designer.SelectedItems.Clear();
this.IsSelected = true;
designer.SelectedItems.Add(this);
}
}
e.Handled = false;
}
public RubberbandAdorner(MyCanvas designerCanvas, Point? dragStartPoint)
: base(designerCanvas)
{
this.designerCanvas = designerCanvas;
this.startPoint = dragStartPoint;
rubberbandPen = new Pen(Brushes.LightSlateGray, 1);
rubberbandPen.DashStyle = new DashStyle(new double[] { 2 }, 1);
}
public RubberbandAdorner(MyCanvas designerCanvas, Point?dragStartPoint)
: base(designerCanvas)
{
this.designerCanvas = designerCanvas;
this.startPoint = dragStartPoint;
rubberbandPen = new Pen(Brushes.LightSlateGray, 1);
rubberbandPen.DashStyle = new DashStyle(new double[] { 2 }, 1);
}
// 当布局更改时更行相对位置
void Connector_LayoutUpdated(object sender, EventArgs e)
{
MyCanvas designer = GetDesignerCanvas(this);
if (designer != null)
{
this.Position = this.TransformToAncestor(designer).Transform(new Point(this.Width / 2, this.Height / 2));
}
}
public ConnectorAdorner(MyCanvas designer, Connector sourceConnector)
: base(designer)
{
this.designerCanvas = designer;
this.sourceConnector = sourceConnector;
drawingPen = new Pen(Brushes.LightSlateGray, 1);
drawingPen.LineJoin = PenLineJoin.Round;
this.Cursor = Cursors.Cross;
}
public ConnectorAdorner(MyCanvas designer, Connector sourceConnector)
: base(designer)
{
this.designerCanvas = designer;
this.sourceConnector = sourceConnector;
drawingPen = new Pen(Brushes.LightSlateGray, 1);
drawingPen.LineJoin = PenLineJoin.Round;
this.Cursor = Cursors.Cross;
}
internal ConnectorInfo GetInfo()
{
ConnectorInfo info = new ConnectorInfo();
info.DesignerItemLeft = MyCanvas.GetLeft(this.ParentDesignerItem);
info.DesignerItemTop = MyCanvas.GetTop(this.ParentDesignerItem);
info.DesignerItemSize = new Size(this.ParentDesignerItem.ActualWidth, this.ParentDesignerItem.ActualHeight);
info.Orientation = this.Orientation;
info.Position = this.Position;
return(info);
}
/// <summary>
/// 鼠标拖拽触发的事件
/// </summary>
/// <param name="e"></param>
protected override void OnDrop(DragEventArgs e)
{
base.OnDrop(e);
this.Focus();
DragObject dragObject = e.Data.GetData(typeof(DragObject)) as DragObject;
if (dragObject != null && !String.IsNullOrEmpty(dragObject.Xaml))
{
DesignerItem newItem = null;
Object content = XamlReader.Load(XmlReader.Create(new StringReader(dragObject.Xaml)));
if (content != null)
{
int maxValue = value++;
newItem = new DesignerItem(TradeCode, maxValue.ToString());
newItem.Content = content;
var lbl = content as Label;
if (lbl != null)
{
newItem.ToolTip = lbl.ToolTip;
}
Point position = e.GetPosition(this);
if (dragObject.DesiredSize.HasValue)
{
Size desiredSize = dragObject.DesiredSize.Value;
newItem.Width = desiredSize.Width;
newItem.Height = desiredSize.Height;
MyCanvas.SetLeft(newItem, Math.Max(0, position.X - newItem.Width / 2));
MyCanvas.SetTop(newItem, Math.Max(0, position.Y - newItem.Height / 2));
}
else
{
MyCanvas.SetLeft(newItem, Math.Max(0, position.X));
MyCanvas.SetTop(newItem, Math.Max(0, position.Y));
}
this.Children.Add(newItem);
//更新选中项
foreach (ISelectable item in this.SelectedItems)
{
item.IsSelected = false;
}
SelectedItems.Clear();
newItem.IsSelected = true;
this.SelectedItems.Add(newItem);
}
e.Handled = true;
}
}
/// <summary>
/// 鼠标单击事件
/// </summary>
/// <param name="e"></param>
protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
{
base.OnMouseLeftButtonDown(e);
MyCanvas canvas = GetDesignerCanvas(this);
if (canvas != null)
{
// 相对于DesignerCanvas的位置
this.dragStartPoint = new Point?(e.GetPosition(canvas));
e.Handled = true;
}
}
void DragThumb_DragDelta(object sender, DragDeltaEventArgs e)
{
DesignerItem designerItem = this.DataContext as DesignerItem;
MyCanvas designer = VisualTreeHelper.GetParent(designerItem) as MyCanvas;
if (designerItem != null && designer != null && designerItem.IsSelected)
{
double minLeft = double.MaxValue;
double minTop = double.MaxValue;
var designerItems = from item in designer.SelectedItems
where item is DesignerItem
select item;
foreach (DesignerItem item in designerItems)
{
double left = Canvas.GetLeft(item);
double top = Canvas.GetTop(item);
minLeft = double.IsNaN(left) ? 0 : Math.Min(left, minLeft);
minTop = double.IsNaN(top) ? 0 : Math.Min(top, minTop);
}
double deltaHorizontal = Math.Max(-minLeft, e.HorizontalChange);
double deltaVertical = Math.Max(-minTop, e.VerticalChange);
foreach (DesignerItem item in designerItems)
{
double left = Canvas.GetLeft(item);
double top = Canvas.GetTop(item);
if (double.IsNaN(left))
{
left = 0;
}
if (double.IsNaN(top))
{
top = 0;
}
Canvas.SetLeft(item, left + deltaHorizontal);
Canvas.SetTop(item, top + deltaVertical);
}
designer.InvalidateMeasure();
e.Handled = true;
}
}
public ConnectionAdorner(MyCanvas designer, Connection connection)
: base(designer)
{
this.designerCanvas = designer;
adornerCanvas = new Canvas();
this.visualChildren = new VisualCollection(this);
this.visualChildren.Add(adornerCanvas);
this.connection = connection;
this.connection.PropertyChanged += new PropertyChangedEventHandler(AnchorPositionChanged);
InitializeDragThumbs();
drawingPen = new Pen(Brushes.LightSlateGray, 1);
drawingPen.LineJoin = PenLineJoin.Round;
}
public ConnectionAdorner(MyCanvas designer, Connection connection)
: base(designer)
{
this.designerCanvas = designer;
adornerCanvas = new Canvas();
this.visualChildren = new VisualCollection(this);
this.visualChildren.Add(adornerCanvas);
this.connection = connection;
this.connection.PropertyChanged += new PropertyChangedEventHandler(AnchorPositionChanged);
InitializeDragThumbs();
drawingPen = new Pen(Brushes.LightSlateGray, 1);
drawingPen.LineJoin = PenLineJoin.Round;
}
private void ShowAdorner()
{
//创建一个ConnectionAdorner装饰器
if (this.connectionAdorner == null)
{
MyCanvas designer = VisualTreeHelper.GetParent(this) as MyCanvas;
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(designer);
if (adornerLayer != null)
{
this.connectionAdorner = new ConnectionAdorner(designer, this);
adornerLayer.Add(this.connectionAdorner);
}
}
this.connectionAdorner.Visibility = Visibility.Visible;
}
/// <summary>
/// 销毁线条
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void Connection_Unloaded(object sender, RoutedEventArgs e)
{
source.PropertyChanged -= new PropertyChangedEventHandler(OnConnectorPositionChanged);
sink.PropertyChanged -= new PropertyChangedEventHandler(OnConnectorPositionChanged);
// remove adorner
if (this.connectionAdorner != null)
{
MyCanvas designer = VisualTreeHelper.GetParent(this) as MyCanvas;
if (designer == null)
{
return;
}
AdornerLayer adornerLayer = AdornerLayer.GetAdornerLayer(designer);
if (adornerLayer != null)
{
adornerLayer.Remove(this.connectionAdorner);
this.connectionAdorner = null;
}
}
}
/// <summary>
/// 鼠标按下事件
/// </summary>
/// <param name="e"></param>
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
MyCanvas designer = VisualTreeHelper.GetParent(this) as MyCanvas;
//designer.Focus();
var lbl = (this.Content) as Label;
lbl.IsHitTestVisible = false;
lbl.Focusable = false;
if (designer != null)
{
if ((Keyboard.Modifiers & (ModifierKeys.Shift | ModifierKeys.Control)) != ModifierKeys.None)
{
if (this.IsSelected)
{
this.IsSelected = false;
designer.SelectedItems.Remove(this);
}
else
{
this.IsSelected = true;
designer.SelectedItems.Add(this);
}
}
else if (!this.IsSelected)
{
foreach (ISelectable item in designer.SelectedItems)
{
item.IsSelected = false;
}
designer.SelectedItems.Clear();
this.IsSelected = true;
designer.SelectedItems.Add(this);
}
}
designer.Focus();
e.Handled = false;
}
protected override void OnMouseDoubleClick(MouseButtonEventArgs e)
{
base.OnMouseDoubleClick(e);
MyCanvas designer = VisualTreeHelper.GetParent(this) as MyCanvas;
var tradeFlow = "";
designer.Save().ForEach(x =>
{
if (x.FlowCode == this.CurrentSerialNumber)
{
tradeFlow = x.Trade_Flow;
}
});
if (designer != null)
{
if (SubRelList == null)
{
SubRelList = new List <SubRel>();
}
Show(this.Name, ComponentCode, CurrentSerialNumber, tradeFlow, ConditionList, SubRelList);
}
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="canvas">canvas对象</param>
public SelectionService(MyCanvas canvas)
{
this.designerCanvas = canvas;
}
/// <summary>
/// 构造函数
/// </summary>
/// <param name="canvas">canvas对象</param>
public SelectionService(MyCanvas canvas)
{
this.designerCanvas = canvas;
}