public CanvasLayerModel(CanvasLayerEx canvasLayer)
{
CanvasLayer = canvasLayer ?? throw new ArgumentNullException(nameof(canvasLayer));
CanvasLayer.IsVisibleChanged += CanvasLayer_IsVisibleChanged;
}
/// <summary>
/// 指定位置的文档打开并加载;
/// </summary>
/// <param name="fileName"></param>
private void OpenDoc(string fileName)
{
if (string.IsNullOrEmpty(fileName))
{
throw new ArgumentNullException(nameof(fileName));
}
if (!File.Exists(fileName))
{
throw new FileNotFoundException();
}
var canvasContext = CanvasService.CanvasDataContext;
canvasContext.Layers.Clear();
var layers = new List <CanvasLayerEx>();
//打开文档,遍历其中的图层元素;
var xDoc = XDocument.Load(fileName);
var layerElems = xDoc.Root.Elements(Constants.XElemName_Layer);
foreach (var layerElem in layerElems)
{
var layer = new CanvasLayerEx(layerElem.Attribute(Constants.XPropName_LayerGUID)?.Value)
{
LayerName = layerElem.Attribute(Constants.XPropName_LayerName)?.Value
};
//遍历图层内的绘制对象元素,反序列化为绘制对象后添加到图层中;
foreach (var dwElem in layerElem.Elements())
{
//遍历序列器;
foreach (var serializer in _serializers)
{
try {
//反序列化,直到返回结果不为空为止;
var drawObject = serializer.Deserialize(dwElem);
if (drawObject == null)
{
continue;
}
layer.AddDrawObject(drawObject);
}
catch (Exception ex) {
LoggerService.WriteException(ex);
}
}
}
layers.Add(layer);
}
CanvasDataContext.ClearTransactions();
CanvasDataContext.Layers.AddRange(layers);
if (layers.Count != 0)
{
CanvasDataContext.ActiveLayer = layers[0];
}
}
