/// <summary>
/// Draw the three with the give draw function
/// </summary>
/// <param name="defaultDrawFunc">default draw function, draw the component when specify tage draw function not exists</param>
public void Draw(float x, float y, DrawNodeFunc defaultDrawFunc, Dictionary <string, DrawNodeFunc> themeDictionary = null)
{
if (defaultDrawFunc == null && themeDictionary == null)
{
throw new ArgumentNullException("defaultDrawFunc");
}
DrawRecursive(x, y, root, defaultDrawFunc, themeDictionary);
}
void DrawRecursive(float x, float y, Node node, DrawNodeFunc defaultDrawFunc, Dictionary <string, DrawNodeFunc> themeDictionary)
{
if (node == null)
{
return;
}
var contextAttr = GetNodeRuntimeAttribute(node);
var drawFunc = themeDictionary != null &&
themeDictionary.TryGetValue(contextAttr.template.TagName, out var specifyDrawFunc)
? specifyDrawFunc : defaultDrawFunc;
if (drawFunc != null)
{
var nc = node.Context; // protected node.Context
var attributes = new Dictionary <string, object>(contextAttr.attributes.Count
+ contextAttr.template.attributes.Count);
foreach (var kv in contextAttr.template.attributes)
{
attributes[kv.Key] = kv.Value;
}
foreach (var kv in contextAttr.attributes)
{
attributes[kv.Key.TargetName] = kv.Value;
}
defaultDrawFunc(x + node.LayoutGetLeft(), y + node.LayoutGetTop(),
node.LayoutGetWidth(), node.LayoutGetHeight(),
contextAttr.textDataBindExpressCurrentValue,
attributes // contextAttr.attributes ???
);
if (!(nc == null && node.Context == null) && nc != node.Context)
{
throw new Exception("cant change node.Context !");
}
node.Context = nc; // protected node.Context
}
foreach (var child in node.Children)
{
DrawRecursive(x + node.LayoutGetLeft(), y + node.LayoutGetTop(), child, defaultDrawFunc, themeDictionary);
}
}
