public override void OnChangeFilter(FilterChangeEventArgs args)
{
RequestRefresh();
base.OnChangeFilter(args);
}
void BrowseViewFilterChanged(object sender, FilterChangeEventArgs e)
{
ResumeRecordListRowChanges();
}
public void OnChangeFilter(FilterChangeEventArgs args)
{
CheckDisposed();
var window = (Form) m_mediator.PropertyTable.GetValue("window");
using (new WaitCursor(window))
{
Logger.WriteEvent("Changing filter.");
// if our clerk is in the state of suspending loading the list, reset it now.
if (SuspendLoadListUntilOnChangeFilter)
SuspendLoadListUntilOnChangeFilter = false;
m_list.OnChangeFilter(args);
// Remember the active filter for this list.
string persistFilter = DynamicLoader.PersistObject(Filter, "filter");
m_mediator.PropertyTable.SetProperty(FilterPropertyTableId, persistFilter, PropertyTable.SettingsGroup.LocalSettings);
// adjust menu bar items according to current state of Filter, where needed.
m_mediator.BroadcastMessage("AdjustFilterSelection", Filter);
UpdateFilterStatusBarPanel();
if (m_list.Filter != null)
Logger.WriteEvent("Filter changed: "+m_list.Filter);
else
Logger.WriteEvent("Filter changed: (no filter)");
// notify clients of this change.
if (FilterChangedByClerk != null)
FilterChangedByClerk(this, args);
}
}
private void FilterChangedHandler(object sender, FilterChangeEventArgs args)
{
if (FilterChanged != null)
FilterChanged(this, args);
}
/// <summary>
/// Notify clients that the clerk has changed the filter.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Clerk_FilterChangedByClerk(object sender, FilterChangeEventArgs e)
{
m_fHandlingFilterChangedByClerk = true;
// Let the client(s) know about the change.
m_browseViewer.UpdateFilterBar(Clerk.Filter);
m_fHandlingFilterChangedByClerk = false;
}
/// <summary>
/// Signal the clerk to change its filter to the user selected value.
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private void FilterChangedHandler(object sender, FilterChangeEventArgs args)
{
// If we're in the process of notifying clients that the clerk has changed
// the filter, we don't need to tell the clerk to change the filter (again)!
if (m_fHandlingFilterChangedByClerk)
return;
Clerk.OnChangeFilter(args);
}
/// <summary>
/// Handle adding and/or removing a filter.
/// </summary>
/// <param name="args"></param>
public void OnChangeFilter(FilterChangeEventArgs args)
{
CheckDisposed();
if (m_filter == null)
{
// Had no filter to begin with
Debug.Assert(args.Removed == null);
m_filter = args.Added is NullFilter? null : args.Added;
}
else if (m_filter.SameFilter(args.Removed))
{
// Simplest case: we had just one filter, the one being removed.
// Change filter to whatever (if anything) replaces it.
m_filter = args.Added is NullFilter? null : args.Added;
}
else if (m_filter is AndFilter)
{
AndFilter af = m_filter as AndFilter;
if (args.Removed != null)
{
af.Remove(args.Removed);
}
if (args.Added != null)
{
//When the user chooses "all records/no filter", the RecordClerk will remove
//its previous filter and add a NullFilter. In that case, we don't really need to add
// that filter. Instead, we can just add nothing.
if (!(args.Added is NullFilter))
af.Add(args.Added);
}
// Remove AndFilter if we get down to one.
// This is not just an optimization, it allows the last filter to be removed
// leaving empty, so the status bar can show that there is then no filter.
if (af.Filters.Count == 1)
m_filter = af.Filters[0] as RecordFilter;
}
else
{
// m_filter is not an AndFilter, so can't contain the one we're removing, nor IS it the one
// we're removing...so we have no way to remove, and it's an error if we're trying to.
Debug.Assert(args.Removed == null || args.Removed is NullFilter);
if (args.Added != null && !(args.Added is NullFilter)) // presumably true or nothing changed, but for paranoia..
{
// We already checked for m_filter being null, so we now have two filters,
// and need to make an AndFilter.
AndFilter af = new AndFilter();
af.Add(m_filter);
af.Add(args.Added);
m_filter = af;
}
}
// Now we have a new filter, we have to recompute what to show.
ReloadList();
}
