public void UserInput(KeyboardInput keyboardInput)
{
bool updateRequired = true;
for (;;)
{
if (_selection.SelectedPoints.Length == 0)
{
break;
}
if (DeletePoints(keyboardInput, _selection.SelectedPoints))
{
break;
}
if (MovePoints(keyboardInput, _selection.SelectedPoints))
{
break;
}
updateRequired = false;
break;
}
_lastKeyboardInput = keyboardInput;
// Update the GUI if needed.
if (updateRequired)
{
Update();
}
}
protected virtual bool MovePoints(KeyboardInput userInput, IPoint[] points)
{
CheckPoints(points);
bool result = false;
if (userInput.KeyState == KeyState.Down)
{
Vector3D moveDelta = new Vector3D(0, 0, 0);
switch (userInput.Key)
{
case Key.Up:
case Key.U:
moveDelta = new Vector3D(0, 0, 1);
break;
case Key.Down:
case Key.J:
moveDelta = new Vector3D(0, 0, -1);
break;
}
// Call the move method with a vector.
if (moveDelta.LengthSquared > 0)
{
result = MovePoints(moveDelta, points);
}
}
return(result);
}
public APlotVM(IPlot plot)
{
_plot = plot;
_lastKeyboardInput = new KeyboardInput();
_lastMouseInput = new MouseInput();
_selection = new SelectionManager(plot);
_plotPoints = new PlotPoints();
Update();
Step = new Vector3D(0, 0, 1);
}
protected virtual bool DeletePoints(KeyboardInput userInput, IPoint[] points)
{
CheckPoints(points);
bool result = false;
if (LastKeyboardInput.Key == Key.Delete && LastKeyboardInput.KeyState == KeyState.Down &&
userInput.Key == Key.Delete && userInput.KeyState == KeyState.Up &&
userInput.ModifierKeys == ModifierKeys.None)
{
result = (_plot.DeletePoints(points) != EditResult.Invalid);
}
return(result);
}
public void OnKeyEvent(KeyEventArgs e)
{
KeyState keyState = KeyState.None;
if (e.IsUp)
{
keyState = KeyState.Up;
}
else if (e.IsDown)
{
keyState = KeyState.Down;
}
KeyboardInput keyboardInput = new KeyboardInput(e.Key, keyState, Keyboard.Modifiers);
UserInput(keyboardInput);
}