/// <summary>
/// 刷新与指定元素连接的连线
/// </summary>
/// <param name="p_elem"></param>
/// <returns></returns>
internal void RefreshLinkLines(FrameworkElement p_elem)
{
SNode node = p_elem as SNode;
if (node != null)
{
var lines = from obj in _container.Children
let item = obj as SLine
where item != null && (item.HeaderID == node.ID || item.TailID == node.ID)
select item;
foreach (var line in lines)
{
line.Refresh();
}
}
}
static void OnFlagChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
SNode node = (SNode)d;
Icons flag = (Icons)e.NewValue;
if (flag == Icons.None)
{
node.FlagShape = null;
}
else
{
var shape = Res.GetIcon(flag, 20, Res.WhiteBrush);
shape.IsHitTestVisible = false;
node.FlagShape = shape;
}
if (flag != Icons.None || (Icons)e.OldValue != Icons.None)
{
node.SavePropertyChange(e);
}
}
/// <summary>
/// 拖拽（连接点公共部分处理）
/// </summary>
/// <param name="p_thumb">点实例</param>
internal bool LinkThumbMove(Thumb p_thumb)
{
Rect rect = new Rect(Canvas.GetLeft(p_thumb), Canvas.GetTop(p_thumb), p_thumb.ActualWidth, p_thumb.ActualHeight);
SNode taget = GetFirstIntersect(rect);
if (taget != null)
{
VisualStateManager.GoToState(p_thumb, "DragValid", true);
//设置目标
_linkPrompt.Width = taget.Width;
_linkPrompt.Height = taget.Height;
Canvas.SetLeft(_linkPrompt, Canvas.GetLeft(taget));
Canvas.SetTop(_linkPrompt, Canvas.GetTop(taget));
_linkPrompt.Visibility = Visibility.Visible;
_linkPrompt.SetValidPos(GetLinkPosition(taget, rect));
return(true);
}
else
{
_linkPrompt.Visibility = Visibility.Collapsed;
return(false);
}
}
/// <summary>
/// 加载xml字符串
/// </summary>
/// <param name="p_xml"></param>
public void ReadXml(string p_xml)
{
_his?.Clear();
_container.Children.Clear();
_selectionClerk.Clear();
if (string.IsNullOrEmpty(p_xml))
{
return;
}
using (StringReader stream = new StringReader(p_xml))
using (XmlReader reader = XmlReader.Create(stream, new XmlReaderSettings()
{
IgnoreWhitespace = true, IgnoreComments = true, IgnoreProcessingInstructions = true
}))
{
reader.Read();
Rect totalRect = new Rect();
bool isFirst = true;
reader.Read();
while (reader.NodeType != XmlNodeType.None)
{
if (reader.NodeType == XmlNodeType.EndElement && reader.Name == "Sketch")
{
break;
}
Rect rc = new Rect();
string name = reader.Name;
if (name == "Node")
{
SNode node = new SNode(this);
_container.Children.Add(node);
node.ReadXml(reader);
rc = new Rect(Canvas.GetLeft(node), Canvas.GetTop(node), node.Width, node.Height);
}
else if (name == "Line")
{
SLine line = new SLine(this);
_container.Children.Add(line);
line.ReadXml(reader);
rc = line.Bounds;
}
else if (name == "Txt")
{
TextBlock tb = new TextBlock();
_container.Children.Add(tb);
for (int i = 0; i < reader.AttributeCount; i++)
{
reader.MoveToAttribute(i);
switch (reader.Name)
{
case "text": tb.Text = reader.Value; break;
case "fontsize": tb.FontSize = double.Parse(reader.Value); break;
// uwp和手机系统weight的操作方式不同
#if UWP
case "fontweight": tb.FontWeight = new FontWeight()
{
Weight = ushort.Parse(reader.Value)
}; break;
#else
case "fontweight": tb.FontWeight = new FontWeight(ushort.Parse(reader.Value)); break;
#endif
case "foreground": tb.Foreground = new SolidColorBrush(Res.HexStringToColor(reader.Value)); break;
case "fontstyle": tb.FontStyle = (FontStyle)int.Parse(reader.Value); break;
case "fontfamily": tb.FontFamily = new FontFamily(reader.Value); break;
case "left": Canvas.SetLeft(tb, double.Parse(reader.Value)); break;
case "top": Canvas.SetTop(tb, double.Parse(reader.Value)); break;
case "width": tb.Width = double.Parse(reader.Value); break;
case "height": tb.Height = double.Parse(reader.Value); break;
}
}
rc = new Rect(Canvas.GetLeft(tb), Canvas.GetTop(tb), tb.Width, tb.Height);
}
if (isFirst)
{
totalRect = rc;
isFirst = false;
}
else
{
totalRect = Union(totalRect, rc);
}
reader.Read();
}
if (IsReadOnly)
{
ResizeReadOnlyPage(totalRect);
}
else
{
ResizeEditPage(totalRect);
}
}
RefreshAllLines();
}