Program Listing for File placeable_window_proxy.h

↰ Return to documentation for file (/tmp/ws/src/mapviz/mapviz_plugins/include/mapviz_plugins/placeable_window_proxy.h)

// *****************************************************************************
//
// Copyright (c) 2014, Southwest Research Institute® (SwRI®)
// 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 Southwest Research Institute® (SwRI®) 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 <COPYRIGHT HOLDER> 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 MAPVIZ_PLUGINS__PLACEABLE_WINDOW_PROXY_H_
#define MAPVIZ_PLUGINS__PLACEABLE_WINDOW_PROXY_H_

#include <QObject>
#include <QRect>
#include <QPoint>

QT_BEGIN_NAMESPACE;
class QMouseEvent;
class QResizeEvent;
QT_END_NAMESPACE;

namespace mapviz_plugins
{
class PlaceableWindowProxy : public QObject
{
Q_OBJECT

public:
  PlaceableWindowProxy();
  ~PlaceableWindowProxy() override;

  void setContainer(QWidget *);

  QRect rect() const;

Q_SIGNALS:
  void rectChanged(const QRect &);

public Q_SLOTS:
  void setRect(const QRect &);
  void setVisible(bool visible);

protected:
  bool eventFilter(QObject *object, QEvent *event) override;

  bool handleMousePress(QMouseEvent *);
  bool handleMouseRelease(QMouseEvent *);
  bool handleMouseMove(QMouseEvent *);
  bool handleResize(QResizeEvent *);

  void timerEvent(QTimerEvent *) override;

  void rectResize(int dx, int dy);
  void winResize(const QSize &);

  QRectF resizeHelper(const QRectF &rect,
                      const QPointF &p1,
                      const QPointF &p2,
                      const QPointF &p3) const;



private:
  enum State {
    INACTIVE = 0,
    MOVE_ALL,
    MOVE_TOP_LEFT,
    MOVE_BOTTOM_LEFT,
    MOVE_BOTTOM_RIGHT,
    MOVE_TOP_RIGHT
  };

  QWidget *target_;
  bool visible_;

  bool has_cursor_;
  State state_;
  QRectF rect_;

  QRectF start_rect_;
  QPoint start_point_;

  int win_resize_timer_;

  State getNextState(const QPointF &pt) const;
};  // class PlaceableWindowProxy
}  // namespace mapviz_plugins
#endif  // MAPVIZ_PLUGINS__PLACEABLE_WINDOW_PROXY_H_