kdeui Library API Documentation

karrowbutton.cpp

00001 /* This file is part of the KDE libraries
00002      Copyright (C) 2001 Frerich Raabe <raabe@kde.org>
00003 
00004    This library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Library General Public
00006    License version 2 as published by the Free Software Foundation.
00007 
00008    This library is distributed in the hope that it will be useful,
00009    but WITHOUT ANY WARRANTY; without even the implied warranty of
00010    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00011      Library General Public License for more details.
00012 
00013      You should have received a copy of the GNU Library General Public License
00014      along with this library; see the file COPYING.LIB.  If not, write to
00015      the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00016      Boston, MA 02111-1307, USA.
00017 */
00018 
00019 #include "karrowbutton.h"
00020 
00021 #include <qstyle.h>
00022 #include <qpainter.h>
00023 
00024 class KArrowButtonPrivate
00025 {
00026     public:
00027         Qt::ArrowType arrow;
00028 };
00029 
00030 KArrowButton::KArrowButton(QWidget *parent, Qt::ArrowType arrow,
00031         const char *name)
00032     : QPushButton(parent, name)
00033 {
00034     d = new KArrowButtonPrivate();
00035     d->arrow = arrow;
00036 }
00037 
00038 KArrowButton::~KArrowButton()
00039 {
00040     delete d;
00041 }
00042 
00043 QSize KArrowButton::sizeHint() const
00044 {
00045     return QSize( 12, 12 );
00046 }
00047 
00048 void KArrowButton::setArrowType(Qt::ArrowType a)
00049 {
00050     if (d->arrow != a) {
00051         d->arrow = a;
00052         repaint();
00053     }
00054 }
00055 
00056 void KArrowButton::drawButton(QPainter *p)
00057 {
00058     const unsigned int arrowSize = 8;
00059     const unsigned int margin = 2;
00060     
00061         p->fillRect( rect(), colorGroup().brush( QColorGroup::Background ) );
00062     style().drawPrimitive( QStyle::PE_Panel, p, QRect( 0, 0, width(), height() ),
00063                    colorGroup(), 
00064                    isDown() ? QStyle::Style_Sunken : QStyle::Style_Default,
00065                    QStyleOption( 2, 0 ) );
00066 
00067     if (static_cast<unsigned int>(width()) < arrowSize + margin ||
00068         static_cast<unsigned int>(height()) < arrowSize + margin)
00069         return; // don't draw arrows if we are too small
00070 
00071     unsigned int x = 0, y = 0;
00072     if (d->arrow == DownArrow) {
00073         x = (width() - arrowSize) / 2;
00074         y = height() - (arrowSize + margin);
00075     } else if (d->arrow == UpArrow) {
00076         x = (width() - arrowSize) / 2;
00077         y = margin;
00078     } else if (d->arrow == RightArrow) {
00079         x = width() - (arrowSize + margin);
00080         y = (height() - arrowSize) / 2;
00081     } else { // arrowType == LeftArrow
00082         x = margin;
00083         y = (height() - arrowSize) / 2;
00084     }
00085 
00086     if (isDown()) {
00087         x++;
00088         y++;
00089     }
00090 
00091     QStyle::PrimitiveElement e = QStyle::PE_ArrowLeft;
00092     switch (d->arrow)
00093     {
00094         case Qt::LeftArrow: e = QStyle::PE_ArrowLeft; break;
00095         case Qt::RightArrow: e = QStyle::PE_ArrowRight; break;
00096         case Qt::UpArrow: e = QStyle::PE_ArrowUp; break;
00097         case Qt::DownArrow: e = QStyle::PE_ArrowDown; break;
00098     }
00099     int flags = QStyle::Style_Enabled;
00100     if ( isDown() )
00101         flags |= QStyle::Style_Down;
00102     style().drawPrimitive( e, p, QRect( QPoint( x, y ), QSize( arrowSize, arrowSize ) ),
00103                    colorGroup(), flags );
00104 }
00105 
00106 void KArrowButton::virtual_hook( int, void* )
00107 { /*BASE::virtual_hook( id, data );*/ }
00108 
00109 #include "karrowbutton.moc"
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This file is part of the documentation for kdeui Library Version 3.3.90.
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