QtCollider/widgets/QcSlider2D.cpp

   1 /************************************************************************
   2 *
   3 * Copyright 2010-2012 Jakob Leben (jakob.leben@gmail.com)
   4 *
   5 * This file is part of SuperCollider Qt GUI.
   6 *
   7 * This program is free software: you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation, either version 3 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 *
  20 ************************************************************************/
  21
  22 #include "QcSlider2D.h"
  23 #include "../QcWidgetFactory.h"
  24 #include "../style/routines.hpp"
  25
  26 #include <QKeyEvent>
  27 #include <QMouseEvent>
  28 #include <QApplication>
  29 #include <QPainter>
  30
  31 QC_DECLARE_QWIDGET_FACTORY(QcSlider2D);
  32
  33 QcSlider2D::QcSlider2D() :
  34   QtCollider::Style::Client(this),
  35   _x( 0.0 ),
  36   _y( 0.0 ),
  37   _thumbSize( QSize( 20, 20 ) ),
  38   _step( 0.01 )
  39 {
  40   setFocusPolicy( Qt::StrongFocus );
  41   setSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding );
  42 }
  43
  44 void QcSlider2D::incrementX( double factor )
  45 {
  46    setValue( QPointF( _step * factor + _x, _y ) );
  47 }
  48
  49 void QcSlider2D::decrementX( double factor )
  50 {
  51   setValue( QPointF( -_step * factor + _x, _y ) );
  52 }
  53
  54 void QcSlider2D::incrementY( double factor )
  55 {
  56    setValue( QPointF( _x, _step * factor + _y ) );
  57 }
  58
  59 void QcSlider2D::decrementY( double factor )
  60 {
  61    setValue( QPointF( _x, -_step * factor + _y ) );
  62 }
  63
  64 QRect QcSlider2D::thumbRect()
  65 {
  66   using namespace QtCollider::Style;
  67   return QtCollider::Style::rect( QPointF(_x,_y), sunkenContentsRect(rect()), _thumbSize );
  68 }
  69
  70 void QcSlider2D::setValue( const QPointF val, bool doAction )
  71 {
  72   double x = qMax( 0.0, qMin( 1.0, (double)val.x() ) );
  73   double y= qMax( 0.0, qMin( 1.0, (double)val.y() ) );
  74   if( x != _x || y != _y ) {
  75     _x = x;
  76     _y = y;
  77     update();
  78     if( doAction ) Q_EMIT( action() );
  79   }
  80 }
  81
  82 void QcSlider2D::mouseMoveEvent ( QMouseEvent * ev )
  83 {
  84   using namespace QtCollider::Style;
  85
  86   if( !ev->buttons() ) return;
  87
  88   QPointF val = QtCollider::Style::value( QPointF(ev->pos()), sunkenContentsRect(rect()), _thumbSize );
  89   setValue(val);
  90 }
  91
  92 void QcSlider2D::mousePressEvent ( QMouseEvent * ev )
  93 {
  94   using namespace QtCollider::Style;
  95   QPointF val = QtCollider::Style::value( QPointF(ev->pos()), sunkenContentsRect(rect()), _thumbSize );
  96   setValue(val);
  97 }
  98
  99 void QcSlider2D::keyPressEvent ( QKeyEvent *e )
 100 {
 101   double step = _step;
 102   switch( e->key() ) {
 103     case Qt::Key_Up:
 104       modifyStep( &step );
 105       setValue( QPointF( _x, _y + step ) ); break;
 106     case Qt::Key_Down:
 107       modifyStep( &step );
 108       setValue( QPointF( _x, _y - step ) ); break;
 109     case Qt::Key_Right:
 110       modifyStep( &step );
 111       setValue( QPointF( _x + step, _y ) ); break;
 112     case Qt::Key_Left:
 113       modifyStep( &step );
 114       setValue( QPointF( _x - step, _y ) ); break;
 115     case Qt::Key_N:
 116       setValue( QPointF( 0.0, 0.0 ) ); break;
 117     case Qt::Key_X:
 118       setValue( QPointF( 1.0, 1.0 ) ); break;
 119     case Qt::Key_C:
 120       setValue( QPointF( 0.5, 0.5 ) ); break;
 121     case Qt::Key_R:
 122       Q_EMIT( randomize() );
 123       break;
 124     default: QWidget::keyPressEvent( e );
 125   }
 126 }
 127
 128 void QcSlider2D::paintEvent ( QPaintEvent *e )
 129 {
 130   using namespace QtCollider::Style;
 131   using QtCollider::Style::Ellipse;
 132   using QtCollider::Style::RoundRect;
 133
 134   Q_UNUSED(e);
 135
 136   QPainter p(this);
 137   p.setRenderHint( QPainter::Antialiasing, true );
 138
 139   QPalette plt = palette();
 140
 141   RoundRect frame(rect(), 2);
 142   drawSunken( &p, plt, frame, grooveColor(), hasFocus() ? focusColor() : QColor() );
 143
 144   Ellipse thumb(thumbRect());
 145   drawRaised( &p, plt, thumb, plt.color(QPalette::Button).lighter(105) );
 146
 147   QRectF r( thumb._rect );
 148   qreal wdif = r.width() * 0.3;
 149   qreal hdif = r.height() * 0.3;
 150   p.setPen( Qt::NoPen );
 151   p.setBrush( knobColor() );
 152   p.drawEllipse( r.adjusted( wdif, hdif, -wdif, -hdif ) );
 153 }