void StopMonitoringChildElement(DependencyObject childElement)
{
// Remove the MatrixGridChildMonitor from the map
// and clear its bindings, which effectively kills
// the monitor and releases it from memory.
if (_childToMonitorMap.ContainsKey(childElement))
{
MatrixGridChildMonitor monitor = _childToMonitorMap[childElement];
BindingOperations.ClearAllBindings(monitor);
_childToMonitorMap.Remove(childElement);
}
}
void StartMonitoringChildElement(DependencyObject childElement)
{
// Create a MatrixGridChildMonitor in order to detect
// changes made to the Grid.Row and Grid.Column attached
// properties on the new child element.
MatrixGridChildMonitor monitor = new MatrixGridChildMonitor();
BindingOperations.SetBinding(
monitor,
MatrixGridChildMonitor.GridRowProperty,
this.CreateMonitorBinding(childElement, Grid.RowProperty));
BindingOperations.SetBinding(
monitor,
MatrixGridChildMonitor.GridColumnProperty,
this.CreateMonitorBinding(childElement, Grid.ColumnProperty));
_childToMonitorMap.Add(childElement, monitor);
}
