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src/qt/src/widgets/qdial.h
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00001 /****************************************************************************
00002 ** $Id: qt/qdial.h   3.3.8   edited Jan 11 14:46 $
00003 **
00004 ** Definition of the dial widget
00005 **
00006 ** Created : 990104
00007 **
00008 ** Copyright (C) 1999-2007 Trolltech ASA.  All rights reserved.
00009 **
00010 ** This file is part of the widgets module of the Qt GUI Toolkit.
00011 **
00012 ** This file may be distributed under the terms of the Q Public License
00013 ** as defined by Trolltech ASA of Norway and appearing in the file
00014 ** LICENSE.QPL included in the packaging of this file.
00015 **
00016 ** This file may be distributed and/or modified under the terms of the
00017 ** GNU General Public License version 2 as published by the Free Software
00018 ** Foundation and appearing in the file LICENSE.GPL included in the
00019 ** packaging of this file.
00020 **
00021 ** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition
00022 ** licenses may use this file in accordance with the Qt Commercial License
00023 ** Agreement provided with the Software.
00024 **
00025 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
00026 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
00027 **
00028 ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
00029 **   information about Qt Commercial License Agreements.
00030 ** See http://www.trolltech.com/qpl/ for QPL licensing information.
00031 ** See http://www.trolltech.com/gpl/ for GPL licensing information.
00032 **
00033 ** Contact info@trolltech.com if any conditions of this licensing are
00034 ** not clear to you.
00035 **
00036 **********************************************************************/
00037 
00038 
00039 #ifndef QDIAL_H
00040 #define QDIAL_H
00041 
00042 #ifndef QT_H
00043 #include "qwidget.h"
00044 #include "qrangecontrol.h"
00045 #endif // QT_H
00046 
00047 #ifndef QT_NO_DIAL
00048 
00049 class QDialPrivate;
00050 
00051 class Q_EXPORT QDial: public QWidget, public QRangeControl
00052 {
00053     Q_OBJECT
00054     Q_PROPERTY( bool tracking READ tracking WRITE setTracking )
00055     Q_PROPERTY( bool wrapping READ wrapping WRITE setWrapping )
00056     Q_PROPERTY( int notchSize READ notchSize )
00057     Q_PROPERTY( double notchTarget READ notchTarget WRITE setNotchTarget )
00058     Q_PROPERTY( bool notchesVisible READ notchesVisible WRITE setNotchesVisible )
00059     Q_PROPERTY( int minValue READ minValue WRITE setMinValue )
00060     Q_PROPERTY( int maxValue READ maxValue WRITE setMaxValue )
00061     Q_PROPERTY( int lineStep READ lineStep WRITE setLineStep )
00062     Q_PROPERTY( int pageStep READ pageStep WRITE setPageStep )
00063     Q_PROPERTY( int value READ value WRITE setValue )
00064         
00065 public:
00066     QDial( QWidget* parent=0, const char* name=0, WFlags f = 0 );
00067     QDial( int minValue, int maxValue, int pageStep, int value,
00068            QWidget* parent=0, const char* name=0 );
00069     ~QDial();
00070 
00071     bool tracking() const;
00072 
00073     bool wrapping() const;
00074 
00075     int notchSize() const;
00076 
00077     virtual void setNotchTarget( double );
00078     double notchTarget() const;
00079 
00080     bool notchesVisible() const;
00081 
00082     QSize sizeHint() const;
00083     QSize minimumSizeHint() const;
00084 
00085     int  minValue() const;
00086     int  maxValue() const;
00087     void setMinValue( int );
00088     void setMaxValue( int );
00089     int  lineStep() const;
00090     int  pageStep() const;
00091     void setLineStep( int );
00092     void setPageStep( int );
00093     int  value() const;
00094 
00095 public slots:
00096     virtual void setValue( int );
00097     void addLine();
00098     void subtractLine();
00099     void addPage();
00100     void subtractPage();
00101     virtual void setNotchesVisible( bool b );
00102     virtual void setWrapping( bool on );
00103     virtual void setTracking( bool enable );
00104 
00105 signals:
00106     void valueChanged( int value );
00107     void dialPressed();
00108     void dialMoved( int value );
00109     void dialReleased();
00110 
00111 protected:
00112     void resizeEvent( QResizeEvent * );
00113     void paintEvent( QPaintEvent * );
00114 
00115     void keyPressEvent( QKeyEvent * );
00116     void mousePressEvent( QMouseEvent * );
00117     void mouseReleaseEvent( QMouseEvent * );
00118     void mouseMoveEvent( QMouseEvent * );
00119 #ifndef QT_NO_WHEELEVENT
00120     void wheelEvent( QWheelEvent * );
00121 #endif
00122     void focusInEvent( QFocusEvent * );
00123     void focusOutEvent( QFocusEvent * );
00124 
00125     void valueChange();
00126     void rangeChange();
00127 
00128     virtual void repaintScreen( const QRect *cr = 0 );
00129 
00130 private:
00131     QDialPrivate * d;
00132 
00133     int valueFromPoint( const QPoint & ) const;
00134     double angle( const QPoint &, const QPoint & ) const;
00135     QPointArray calcArrow( double &a ) const;
00136     QRect calcDial() const;
00137     int calcBigLineSize() const;
00138     void calcLines();
00139 
00140 private: // Disabled copy constructor and operator=
00141 #if defined(Q_DISABLE_COPY)
00142     QDial( const QDial & );
00143     QDial &operator=( const QDial & );
00144 #endif
00145 
00146 };
00147 
00148 #endif  // QT_NO_DIAL
00149 
00150 #endif
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