// Check if the category is shown for the current category editor type
private bool IsCategoryShown(Type categoryEditorType)
{
bool ret = true;
CategoryEditor editorToRemove = (CategoryEditor)ExtensibilityAccessor.SafeCreateInstance(categoryEditorType);
if (editorToRemove != null)
{
ModelCategoryEntry affectedCategory = _categoryList.FindCategory(editorToRemove.TargetCategory) as ModelCategoryEntry;
if (affectedCategory == null)
{
ret = false;
}
}
else
{
ret = false;
}
return(ret);
}
// Helper method that adjusts the visible set of CategoryEditors based on the specified selection
private void UpdateCategoryEditors(View.Selection selection)
{
// Figure out which category editors to show
Dictionary <Type, object> newCategoryEditorTypes = _propertyToolBar.CurrentViewManager.GetCategoryEditors(
FindCommonType(selection == null ? null : selection.SelectedObjects),
_categoryList);
// Figure out which CategoryEditors are no longer needed and remove them
List <Type> editorTypesToRemove = null;
foreach (KeyValuePair <Type, string> item in _activeCategoryEditors)
{
if (!newCategoryEditorTypes.ContainsKey(item.Key) || !IsCategoryShown(item.Key))
{
// New selection does not include this existing category editor
// or the category that contains this editor
// so remove the editor.
if (editorTypesToRemove == null)
{
editorTypesToRemove = new List <Type>();
}
editorTypesToRemove.Add(item.Key);
}
else
{
// This category editor already exists, so don't re-add it
newCategoryEditorTypes.Remove(item.Key);
}
}
if (editorTypesToRemove != null)
{
foreach (Type editorTypeToRemove in editorTypesToRemove)
{
ModelCategoryEntry affectedCategory = _categoryList.FindCategory(_activeCategoryEditors[editorTypeToRemove]) as ModelCategoryEntry;
if (affectedCategory != null)
{
affectedCategory.RemoveCategoryEditor(editorTypeToRemove);
}
_activeCategoryEditors.Remove(editorTypeToRemove);
}
}
// Figure out which CategoryEditors are now required and add them
foreach (Type editorTypeToAdd in newCategoryEditorTypes.Keys)
{
CategoryEditor editor = (CategoryEditor)ExtensibilityAccessor.SafeCreateInstance(editorTypeToAdd);
if (editor == null)
{
continue;
}
ModelCategoryEntry affectedCategory = _categoryList.FindCategory(editor.TargetCategory) as ModelCategoryEntry;
if (affectedCategory == null)
{
continue;
}
affectedCategory.AddCategoryEditor(editor);
_activeCategoryEditors[editorTypeToAdd] = editor.TargetCategory;
}
}