text: /*
   * Copyright (c) 2011, Dirk Thomas, TU Darmstadt
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *   * Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *   * Redistributions in binary form must reproduce the above
   *     copyright notice, this list of conditions and the following
   *     disclaimer in the documentation and/or other materials provided
   *     with the distribution.
   *   * Neither the name of the TU Darmstadt nor the names of its
   *     contributors may be used to endorse or promote products derived
   *     from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
   * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
   * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
   * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef rqt_compass__RatioLayoutedFrame_H
  #define rqt_compass__RatioLayoutedFrame_H
  
  #include <QFrame>
  #include <QLayout>
  #include <QLayoutItem>
  #include <QPainter>
  #include <QRect>
  #include <QSize>
  
  namespace rqt_compass {
  
  /**
   * RatioLayoutedFrame is a layout containing a single frame with a fixed aspect ratio.
   * The default aspect ratio is 4:3.
   */
  class RatioLayoutedFrame
    : public QFrame
  {
  
    Q_OBJECT
  
  public:
  
    RatioLayoutedFrame(QWidget* parent, Qt::WFlags flags = 0);
  
    virtual ~RatioLayoutedFrame();
  
    QRect getAspectRatioCorrectPaintArea();
  
    void resizeToFitAspectRatio();
  
    void setInnerFrameMinimumSize(const QSize& size);
  
    void setInnerFrameMaximumSize(const QSize& size);
  
    void setInnerFrameFixedSize(const QSize& size);
  
    void setAspectRatio(unsigned short width, unsigned short height);
  
  private:
  
    static int greatestCommonDivisor(int a, int b);
  
    QSize aspect_ratio_;
  
  };
  
  }
  
  #endif // rqt_compass__RatioLayoutedFrame_H
  