private void EnableSingleSelection(bool enable)
{
GraphEditorInputMode mode = (GraphEditorInputMode)graphControl.InputMode;
if (enable)
{
// remember old recognizer so we can restore it later
oldMultiSelectionRecognizer = mode.MultiSelectionRecognizer;
// disable marquee selection
mode.MarqueeSelectionInputMode.Enabled = false;
// disable multi selection with Ctrl-Click
mode.MultiSelectionRecognizer = EventRecognizers.Never;
// deactivate commands that can lead to multi selection
mode.AvailableCommands.Remove(Commands.ToggleItemSelection);
mode.AvailableCommands.Remove(Commands.SelectAll);
mode.NavigationInputMode.AvailableCommands.Remove(Commands.ExtendSelectionLeft);
mode.NavigationInputMode.AvailableCommands.Remove(Commands.ExtendSelectionUp);
mode.NavigationInputMode.AvailableCommands.Remove(Commands.ExtendSelectionDown);
mode.NavigationInputMode.AvailableCommands.Remove(Commands.ExtendSelectionRight);
// add custom binding for toggle item selection
toggleBindingOverride = mode.KeyboardInputMode.AddCommandBinding(Commands.ToggleItemSelection, ToggleItemSelectionExecuted, ToggleItemSelectionCanExecute);
//Disable selection of (possibly multiple) items
oldPasteItems = mode.PasteSelectableItems;
mode.PasteSelectableItems = GraphItemTypes.None;
//Also clear the selection - even though the setup works when more than one item is selected, it looks a bit strange
graphControl.Selection.Clear();
}
else
{
// restore old settings
mode.MarqueeSelectionInputMode.Enabled = true;
mode.MultiSelectionRecognizer = oldMultiSelectionRecognizer;
mode.PasteSelectableItems = oldPasteItems;
// re-activate commands
mode.AvailableCommands.Add(Commands.ToggleItemSelection);
mode.AvailableCommands.Add(Commands.SelectAll);
mode.NavigationInputMode.AvailableCommands.Add(Commands.ExtendSelectionLeft);
mode.NavigationInputMode.AvailableCommands.Add(Commands.ExtendSelectionUp);
mode.NavigationInputMode.AvailableCommands.Add(Commands.ExtendSelectionDown);
mode.NavigationInputMode.AvailableCommands.Add(Commands.ExtendSelectionRight);
// remove custom binding for toggle item selection
toggleBindingOverride.Remove();
toggleBindingOverride = null;
}
}
private void OnWindowLoaded(object sender, RoutedEventArgs e)
{
graphControl.Graph.NodeDefaults.Style = new ShinyPlateNodeStyle {
Brush = Brushes.Orange
};
var graphEditorInputMode = new GraphEditorInputMode();
graphControl.InputMode = graphEditorInputMode;
oldPasteItems = graphEditorInputMode.PasteSelectableItems;
EnableSingleSelection(true);
LoadGraph();
graphControl.FitGraphBounds();
}
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
graphControl.Graph.NodeDefaults.Style = new ShinyPlateNodeStyle {
Brush = Brushes.Orange
};
var graphEditorInputMode = new GraphEditorInputMode();
graphControl.InputMode = graphEditorInputMode;
oldPasteItems = graphEditorInputMode.PasteSelectableItems;
EnableSingleSelection(true);
LoadGraph();
graphControl.FitGraphBounds();
}
private void EnableSingleSelection(bool enable)
{
GraphEditorInputMode mode = (GraphEditorInputMode)graphControl.InputMode;
if (enable)
{
// remember old recognizer so we can restore it later
oldMultiSelectionRecognizer = mode.MultiSelectionRecognizer;
// disable marquee selection
mode.MarqueeSelectionInputMode.Enabled = false;
// disable multi selection with Ctrl-Click
mode.MultiSelectionRecognizer = EventRecognizers.Never;
// deactivate commands that can lead to multi selection
mode.AvailableCommands.Remove(GraphCommands.ToggleItemSelection);
mode.AvailableCommands.Remove(ApplicationCommands.SelectAll);
mode.NavigationInputMode.AvailableCommands.Remove(ComponentCommands.ExtendSelectionLeft);
mode.NavigationInputMode.AvailableCommands.Remove(ComponentCommands.ExtendSelectionUp);
mode.NavigationInputMode.AvailableCommands.Remove(ComponentCommands.ExtendSelectionDown);
mode.NavigationInputMode.AvailableCommands.Remove(ComponentCommands.ExtendSelectionRight);
// add dummy command bindings that do nothing in order to prevent WPF default behavior
graphControl.CommandBindings.Add(extendSelectionLeftBinding);
graphControl.CommandBindings.Add(extendSelectionRightBinding);
graphControl.CommandBindings.Add(extendSelectionUpBinding);
graphControl.CommandBindings.Add(extendSelectionDownBinding);
// add custom binding for toggle item selection
graphControl.CommandBindings.Add(customToggleSelectionBinding);
//Disable selection of (possibly multiple) items
oldPasteItems = mode.PasteSelectableItems;
mode.PasteSelectableItems = GraphItemTypes.None;
//Also clear the selection - even though the setup works when more than one item is selected, it looks a bit strange
graphControl.Selection.Clear();
}
else
{
// restore old settings
mode.MarqueeSelectionInputMode.Enabled = true;
mode.MultiSelectionRecognizer = oldMultiSelectionRecognizer;
mode.PasteSelectableItems = oldPasteItems;
// re-activate commands
mode.AvailableCommands.Add(GraphCommands.ToggleItemSelection);
mode.AvailableCommands.Add(ApplicationCommands.SelectAll);
mode.NavigationInputMode.AvailableCommands.Add(ComponentCommands.ExtendSelectionLeft);
mode.NavigationInputMode.AvailableCommands.Add(ComponentCommands.ExtendSelectionUp);
mode.NavigationInputMode.AvailableCommands.Add(ComponentCommands.ExtendSelectionDown);
mode.NavigationInputMode.AvailableCommands.Add(ComponentCommands.ExtendSelectionRight);
graphControl.CommandBindings.Remove(extendSelectionLeftBinding);
graphControl.CommandBindings.Remove(extendSelectionRightBinding);
graphControl.CommandBindings.Remove(extendSelectionUpBinding);
graphControl.CommandBindings.Remove(extendSelectionDownBinding);
// remove custom binding for toggle item selection
graphControl.CommandBindings.Remove(customToggleSelectionBinding);
}
}
