.. _program_listing_file_include_mapviz_widgets.h:

Program Listing for File widgets.h
==================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_mapviz_widgets.h>` (``include/mapviz/widgets.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // *****************************************************************************
   //
   // 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_WIDGETS_H_
   #define MAPVIZ_WIDGETS_H_
   
   // QT libraries
   #include <QWidget>
   #include <QListWidget>
   #include <QListWidgetItem>
   #include <QLabel>
   #include <QMouseEvent>
   #include <QDropEvent>
   #include <QPainter>
   #include <QPixmap>
   
   namespace mapviz
   {
   class PluginConfigList : public QListWidget
   {
     Q_OBJECT
   
   public:
     explicit PluginConfigList(QWidget *parent = nullptr) : QListWidget(parent) {}
     PluginConfigList() = default;
   
     void UpdateIndices()
     {
       for (int i = 0; i < count(); i++) {
         item(i)->setData(Qt::UserRole, QVariant((static_cast<float>(i))));
       }
     }
   
   Q_SIGNALS:
     void ItemsMoved();
   
   protected:
     void dropEvent(QDropEvent* event) override
     {
       QListWidget::dropEvent(event);
   
       UpdateIndices();
   
       Q_EMIT ItemsMoved();
     }
   };
   
   class PluginConfigListItem : public QListWidgetItem
   {
   public:
     explicit PluginConfigListItem(QListWidget *parent = nullptr) : QListWidgetItem(parent) {}
   
     bool operator< (const QListWidgetItem & other) const override
     {
       return data(Qt::UserRole).toFloat() < other.data(Qt::UserRole).toFloat();
     }
   };
   
   class SingleClickLabel : public QLabel
   {
     Q_OBJECT
   
   public:
     explicit SingleClickLabel(QWidget *parent = 0, Qt::WindowFlags flags = Qt::WindowFlags()) :
       QLabel(parent, flags) {}
   
     ~SingleClickLabel() override = default;
   
   Q_SIGNALS:
     void Clicked();
   
   protected:
     void mousePressEvent(QMouseEvent*) override
     {
       Q_EMIT Clicked();
     }
   };
   
   class DoubleClickWidget : public QWidget
   {
     Q_OBJECT
   
   public:
     explicit DoubleClickWidget(QWidget *parent = 0, Qt::WindowFlags flags = Qt::WindowFlags()) :
       QWidget(parent, flags) {}
   
     ~DoubleClickWidget() override = default;
   
   Q_SIGNALS:
     void DoubleClicked();
     void RightClicked();
   
   protected:
     void mouseDoubleClickEvent(QMouseEvent* event) override
     {
       if (event->button() == Qt::LeftButton) {
         Q_EMIT DoubleClicked();
       }
     }
   
     void mouseReleaseEvent(QMouseEvent* event) override
     {
       if (event->button() == Qt::RightButton) {
         Q_EMIT RightClicked();
       }
     }
   };
   
   class IconWidget : public QWidget
   {
     Q_OBJECT
   
   public:
     explicit IconWidget(QWidget *parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags()) :
       QWidget(parent, flags)
     {
       pixmap_ = QPixmap(16, 16);
       pixmap_.fill(Qt::transparent);
     }
   
     ~IconWidget() override = default;
   
     void SetPixmap(QPixmap pixmap)
     {
       pixmap_ = pixmap;
       update();
     }
   
   protected:
     void paintEvent(QPaintEvent*) override
     {
       QPainter painter(this);
       painter.fillRect(0, 0, width(), height(), palette().color(QPalette::Button));
   
       int x_offset = (width() - pixmap_.width()) / 2;
       int y_offset = (height() - pixmap_.height()) / 2;
   
       painter.drawPixmap(x_offset, y_offset, pixmap_);
     }
   
     QPixmap pixmap_;
   };
   }   // namespace mapviz
   
   #endif  // MAPVIZ__WIDGETS_H_