private void RemoveManager(IWpfTaskVisualizationManager manager)
{
manager.Dispose();
lock (_visualizationManagers)
{
_visualizationManagers.Remove(manager);
}
}
public UIElement CreateElement(Application app, Window window, params object[] parameters)
{
IWpfTaskVisualizationManager manager;
UIElement showMoreIndicator = _showMoreFactory.CreateElement(app, window, parameters);
lock (_visualizationManagers)
{
IWpfTaskVisualizationManager firstManager = _visualizationManagers.FirstAvailable();
IEnumerable <ITaskObserver> activeTasks = firstManager?.ActiveTasks;
IEnumerable <ITaskObserver> pendingTasks = firstManager?.PendingTasks;
manager = new TaskVisualizationManager(_maxElements, showMoreIndicator, SigmaEnvironment.TaskManager, activeTasks, pendingTasks);
_visualizationManagers.Add(manager);
}
// When the window is closed, unassign the manager to prevent memory leaks.
EventHandler handler = null;
handler = (sender, args) =>
{
RemoveManager(manager);
window.Closed -= handler;
};
window.Closed += handler;
Grid grid = new Grid();
// + 1 for the show more indicator
for (int i = 0; i <= _maxElements; i++)
{
grid.ColumnDefinitions.Add(new ColumnDefinition {
Width = new GridLength(1, GridUnitType.Auto)
});
}
// add the TaskVisualizers
for (int i = 0; i < _maxElements; i++)
{
grid.Children.Add(manager.TaskVisualizers[i]);
Grid.SetColumn(manager.TaskVisualizers[i], i);
}
// add the show more indicator
grid.Children.Add(showMoreIndicator);
Grid.SetColumn(showMoreIndicator, _maxElements);
return(grid);
}
