public override bool ProcessKeyEvent(IDiagramPresenter diagramPresenter, KeyEventArgsDg e)
{
if (diagramPresenter == null) throw new ArgumentNullException("diagramPresenter");
// if the keyPress was not handled by the base class, try to handle it here
bool result = false;
switch (e.EventType) {
case KeyEventType.PreviewKeyDown:
case KeyEventType.KeyPress:
// do nothing
break;
case KeyEventType.KeyDown:
case KeyEventType.KeyUp:
if ((KeysDg) e.KeyCode == KeysDg.Delete) {
// Update selected shape unter the mouse cursor because it was propably deleted
if (!selectedShapeAtCursorInfo.IsEmpty &&
!diagramPresenter.SelectedShapes.Contains(selectedShapeAtCursorInfo.Shape)) {
SetSelectedShapeAtCursor(diagramPresenter, CurrentMouseState.X, CurrentMouseState.Y,
diagramPresenter.ZoomedGripSize, ControlPointCapabilities.All);
Invalidate(diagramPresenter);
}
}
// Update Cursor when modifier keys are pressed or released
if (((KeysDg) e.KeyCode & KeysDg.Shift) == KeysDg.Shift
|| ((KeysDg) e.KeyCode & KeysDg.ShiftKey) == KeysDg.ShiftKey
|| ((KeysDg) e.KeyCode & KeysDg.Control) == KeysDg.Control
|| ((KeysDg) e.KeyCode & KeysDg.ControlKey) == KeysDg.ControlKey
|| ((KeysDg) e.KeyCode & KeysDg.Alt) == KeysDg.Alt) {
MouseState mouseState = CurrentMouseState;
mouseState.Modifiers = (KeysDg) e.Modifiers;
int cursorId = DetermineCursor(diagramPresenter, mouseState);
diagramPresenter.SetCursor(cursorId);
}
break;
default:
throw new NShapeUnsupportedValueException(e.EventType);
}
if (base.ProcessKeyEvent(diagramPresenter, e)) result = true;
return result;
}
/// <summary>
/// Processes a keyboard event.
/// </summary>
/// <param name="diagramPresenter">Diagram presenter where the event occurred.</param>
/// <param name="e">Description of the keyboard event.</param>
/// <returns>True if the event was handled, false if the event was not handled.</returns>
public virtual bool ProcessKeyEvent(IDiagramPresenter diagramPresenter, KeyEventArgsDg e) {
if (diagramPresenter == null) throw new ArgumentNullException("diagramPresenter");
bool result = false;
switch (e.EventType) {
case KeyEventType.KeyDown:
// Cancel tool
if (e.KeyCode == (int)KeysDg.Escape) {
Cancel();
result = true;
}
break;
case KeyEventType.KeyPress:
case KeyEventType.PreviewKeyDown:
case KeyEventType.KeyUp:
// do nothing
break;
default: throw new NShapeUnsupportedValueException(e.EventType);
}
diagramPresenter.Update();
return result;
}
/// <override></override>
public override bool ProcessKeyEvent(IDiagramPresenter diagramPresenter, KeyEventArgsDg e) {
return base.ProcessKeyEvent(diagramPresenter, e);
}
/// <override></override>
public override bool ProcessKeyEvent(IDiagramPresenter diagramPresenter, KeyEventArgsDg e)
{
// nothing to do
return false;
}