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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* stackedwidget.h
*
* Mon Nov 21 19:36:49 CET 2016
* Copyright 2016 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#pragma once
#include <list>
#include "widget.h"
#include "notifier.h"
namespace GUI
{
//! A StackedWidget is a widget containing a list of widgets but only showing
//! one of them at a time.
//! It is be used to implement a TabWidget but can also be used for other
//! purposes.
class StackedWidget
: public Widget
{
public:
StackedWidget(Widget* parent);
~StackedWidget();
//! Add a widget to the stack.
void addWidget(Widget* widget);
//! Remove a widget from the stack.
void removeWidget(Widget* widget);
//! Get currently visible widget.
Widget* getCurrentWidget() const;
//! Show widget. Hide all the others.
//! If widget is not in the stack nothing happens.
void setCurrentWidget(Widget* widget);
//! Returns a pointer to the Widget after the one referenced by 'widget' or
//! nullptr if 'widget' is the last in the list.
Widget* getWidgetAfter(Widget* widget);
//! Returns a pointer to the Widget beforer the one referenced by 'widget' or
//! nullptr if 'widget' is the first in the list.
Widget* getWidgetBefore(Widget* widget);
//! Reports whn a new widget is shown.
Notifier<Widget*> currentChanged;
private:
//! Callback for Widget::sizeChangeNotifier
void sizeChanged(int width, int height);
private:
Widget* currentWidget{nullptr};
std::list<Widget*> widgets;
};
} // GUI::
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