src/components/colorpalette/private/gradientselector.h

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Jorge Cuadrado                                  *
   3  *   kuadrosx@gmail.com                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #ifndef GRADIENTSELECTOR_H
  22 #define GRADIENTSELECTOR_H
  23
  24 #include <QAbstractSlider>
  25 #include <QColor>
  26 #include <QImage>
  27 #include <QPixmap>
  28 #include <QPainter>
  29 #include <QMouseEvent>
  30 #include <QWheelEvent>
  31 #include <QPaintEvent>
  32 #include <QPoint>
  33 #include <QLinearGradient>
  34 #include <QPainterPath>
  35
  36 #include <QList>
  37
  38 /**
  39  * @if english
  40  * @short translate me
  41  * @elseif spanish
  42  * @short Esta clase provee de una simple interfaz grafica para generar "GradientStops".
  43  * @endif
  44  * @author Jorge Cuadrado <kuadrosx@gmail.com>
  45  */
  46 class GradientSelector : public QAbstractSlider
  47 {
  48         Q_OBJECT;
  49
  50         public:
  51
  52                 /**
  53                  * @if english
  54                  * Translate
  55                  * @elseif spanish
  56                  * Constructor por defecto.
  57                  * @endif
  58                  */
  59                 GradientSelector( QWidget *parent=0 );
  60
  61                 /**
  62                  * Destructor
  63                  */
  64                 ~GradientSelector();
  65                 /**
  66                  * @if english
  67                  * Translate
  68                  * @elseif spanish
  69                  * Pone un GradienStops, para ser editado.
  70                  * @endif
  71                  */
  72                 void setStops(const QGradientStops &);
  73                 QRect contentsRect() const;
  74                 void setValue(int value);
  75                 int value() const;
  76
  77                 /**
  78                  * @if english
  79                  * Translate
  80                  * @elseif spanish
  81                  * Pone el numero maximo de flechas, que definen el "GradienStops".
  82                  * @endif
  83                  */
  84                 void setMaxArrows(int value);
  85                 /**
  86                  * @if english
  87                  * Translate
  88                  * @elseif spanish
  89                  * Devuelve el "GradienStops" actual.
  90                  * @endif
  91                  */
  92                 QGradientStops  gradientStops() const;
  93
  94                 /**
  95                  * @if english
  96                  * Translate
  97                  * @elseif spanish
  98                  * Crea el "GradienStops" actual apartir de las flechas acutales.
  99                  * @endif
 100                  */
 101                 void  createGradient();
 102                 /**
 103                  * @if english
 104                  * Translate
 105                  * @elseif spanish
 106                  * Cambia el color de la flecha actualmente seleccionada.
 107                  * @endif
 108                  */
 109                 void setCurrentColor(const QColor& color);
 110
 111         signals:
 112                 void newValue( int value );
 113                 void gradientChanged(  const QGradientStops& );
 114                 void arrowAdded();
 115
 116         public slots:
 117                 void addArrow(QPoint position, QColor color);
 118                 virtual void valueChange( int value);
 119
 120         protected:
 121                 virtual void drawContents( QPainter * );
 122                 virtual void paintEvent( QPaintEvent * );
 123                 virtual void mousePressEvent( QMouseEvent *e );
 124                 virtual void mouseMoveEvent( QMouseEvent *e );
 125                 virtual void wheelEvent( QWheelEvent * );
 126
 127                 virtual QSize minimumSize() const;
 128
 129                 virtual void resizeEvent ( QResizeEvent * event );
 130                 virtual QSize sizeHint() const;
 131
 132
 133         private:
 134                 QPoint calcArrowPos( int val );
 135                 void moveArrow( const QPoint &pos );
 136                 double valueToGradient(int _value) const;
 137
 138         private:
 139                 struct Private;
 140                 Private *d;
 141 };
 142
 143 #endif