File indexing completed on 2024-05-12 15:54:10

 /*
  * Copyright (C) 2001-2015 Klaralvdalens Datakonsult AB.  All rights reserved.
  *
  * This file is part of the KD Chart library.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program 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 General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
 #ifndef KCHARTABSTRACTAREAWIDGET_H
 #define KCHARTABSTRACTAREAWIDGET_H
 
 #include <QWidget>
 #include <QPaintEvent>
 #include <QPainter>
 #include <QRect>
 
 #include "KChartAbstractAreaBase.h"
 
 namespace KChart {
 
 
 /**
   * @class AbstractAreaWidget KChartAbstractArea.h
   * @brief An area in the chart with a background, a frame, etc.
   *
   * AbstractAreaWidget is the base for all widget classes that have
   * a set of background attributes and frame attributes, such as
   * KChart::Chart and KChart::Legend.
   */
 class KCHART_EXPORT AbstractAreaWidget : public QWidget, public AbstractAreaBase
 {
     Q_OBJECT
 
     Q_DISABLE_COPY( AbstractAreaWidget )
     KCHART_DECLARE_PRIVATE_DERIVED_QWIDGET( AbstractAreaWidget )
 
 public:
     explicit AbstractAreaWidget( QWidget* parent = nullptr );
 
     /**
       * @brief Draws the background and frame, then calls paint().
       *
       * In most cases there is no need to overwrite this method in a derived
       * class, but you would overwrite paint() instead.
       * @sa paint
       */
     void paintEvent( QPaintEvent* event ) override;
 
     /**
       * @brief Draws the background and frame, then calls paint().
       *
       * In most cases there is no need to overwrite this method in a derived
       * class, but you would overwrite paint() instead.
       */
     virtual void paintIntoRect( QPainter& painter, const QRect& rect );
 
     /**
       * Overwrite this to paint the inner contents of your widget.
       *
       * @note When overriding this method, please let your widget draw
       * itself at the top/left corner of the painter.  You should call rect()
       * (or width(), height(), resp.) to find the drawable area's size:
       * While the paint() method is being executed the frame of the widget
       * is outside of its rect(), so you can use all of rect() for
       * your custom drawing!
       * @sa paint, paintIntoRect
       */
     virtual void paint( QPainter* painter ) = 0;
 
     /**
       * Call paintAll, if you want the background and the frame to be drawn
       * before the normal paint() is invoked automatically.
       */
     void paintAll( QPainter& painter );
 
     /**
       * Call this to trigger an unconditional re-building of the widget's internals.
       */ 
     virtual void forceRebuild();
 
     /**
       * Call this to trigger an conditional re-building of the widget's internals.
       *
       * e.g. AbstractAreaWidget call this, before calling layout()->setGeometry()
       */ 
     virtual void needSizeHint();
     virtual void resizeLayout( const QSize& );
 
 Q_SIGNALS:
     void positionChanged( AbstractAreaWidget * );
 
 protected:
     virtual ~AbstractAreaWidget() ;
     QRect areaGeometry() const override;
     void positionHasChanged() override;
 };
 
 }
 #endif // KCHARTABSTRACTAREAWIDGET_H