How to use

SelectAreaAction

in

jsettlers.common.action

private void updateSelectionArea(UIPoint mousePosition, boolean finished) {
  if (finished && currentSelectionAreaStart != null) {
    int x1 = (int) mousePosition.getX();
    int x2 = (int) this.currentSelectionAreaStart.getX();
    int y1 = (int) mousePosition.getY();
    int y2 = (int) this.currentSelectionAreaStart.getY();
    if (x1 > x2) {
      int temp = x1;
      x1 = x2;
      x2 = temp;
    }
    if (y1 > y2) {
      int temp = y1;
      y1 = y2;
      y2 = temp;
    }
    IMapArea area = this.context.getRectangleOnScreen(x1, y1, x2, y2);
    getInterfaceConnector().fireAction(new SelectAreaAction(area));
    this.currentSelectionAreaStart = null;
    this.currentSelectionAreaEnd = null;
  } else {
    this.currentSelectionAreaEnd = mousePosition;
    updateSelectionArea = true;
  }
}

private void selectArea(SelectAreaAction action) {
  final SelectionSet selectionSet = new SelectionSet();
  action.getArea().stream().filterBounds(grid.getWidth(), grid.getHeight()).forEach((x, y) -> {
    final IGuiMovable movable = grid.getMovable(x, y);
    if (movable != null && canSelectPlayer(movable.getPlayer().getPlayerId())) {
      selectionSet.add(movable);
    }
    final IBuilding building = grid.getBuildingAt(x, y);
    if (building != null && canSelectPlayer(building.getPlayer().getPlayerId())) {
      selectionSet.add(building);
    }
  });
  setSelection(selectionSet);
}