/// <summary>
/// 更新关联的radiobutton
/// </summary>
private void UpdateRadioButtonGroup()
{
string groupName = GroupName;
if (!string.IsNullOrEmpty(groupName))
{
Visual rootScope = GetVisualRoot(this);
if (_groupNameToElements == null)
{
_groupNameToElements = new Hashtable(1);
}
lock (_groupNameToElements) {
ArrayList elements = (ArrayList)_groupNameToElements[groupName];
for (int i = 0; i < elements.Count;)
{
WeakReference weakReference = (WeakReference)elements[i];
FIconRadioButton rb = weakReference.Target as FIconRadioButton;
if (rb == null)
{
elements.RemoveAt(i);
}
else
{
if (rb != this && (rb.IsChecked == true) && rootScope == GetVisualRoot(rb))
{
rb.UncheckRadioButton();
}
i++;
}
}
}
}
else
{
DependencyObject parent = this.Parent;
if (parent != null)
{
IEnumerable children = LogicalTreeHelper.GetChildren(parent);
IEnumerator itor = children.GetEnumerator();
while (itor.MoveNext())
{
FIconRadioButton rb = itor.Current as FIconRadioButton;
if (rb != null && rb != this && string.IsNullOrEmpty(rb.GroupName) && (rb.IsChecked == true))
{
rb.UncheckRadioButton();
}
}
}
}
}
/// <summary>
/// GroupName的变更回调
/// </summary>
private static void OnGroupNameChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
FIconRadioButton radioButton = (FIconRadioButton)d;
string groupName = e.NewValue as string;
string currentlyRegisteredGroupName = (string)radioButton.GetValue(_currentlyRegisteredGroupName);
if (groupName != currentlyRegisteredGroupName)
{
if (!string.IsNullOrEmpty(currentlyRegisteredGroupName))
{
Unregister(currentlyRegisteredGroupName, radioButton);
}
if (!string.IsNullOrEmpty(groupName))
{
Register(groupName, radioButton);
}
}
}
/// <summary>
/// 注销一对RadioButton与GroupName的关联
/// </summary>
private static void Unregister(string groupName, FIconRadioButton radioButton)
{
if (_groupNameToElements == null)
{
return;
}
lock (_groupNameToElements) {
ArrayList elements = (ArrayList)_groupNameToElements[groupName];
if (elements != null)
{
PurgeDead(elements, radioButton);
if (elements.Count == 0)
{
_groupNameToElements.Remove(groupName);
}
}
}
radioButton.SetValue(_currentlyRegisteredGroupName, null);
}
/// <summary>
/// 注册一对RadioButton与GroupName的关联
/// </summary>
private static void Register(string groupName, FIconRadioButton radioButton)
{
if (_groupNameToElements == null)
{
_groupNameToElements = new Hashtable(1);
}
lock (_groupNameToElements) {
ArrayList elements = (ArrayList)_groupNameToElements[groupName];
if (elements == null)
{
elements = new ArrayList(1);
_groupNameToElements[groupName] = elements;
}
else
{
PurgeDead(elements, null);
}
elements.Add(new WeakReference(radioButton));
}
radioButton.SetValue(_currentlyRegisteredGroupName, groupName);
}