kdeui

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., 51 Franklin Street, Fifth Floor,
00016      Boston, MA 02110-1301, 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 Qt::ArrowType KArrowButton::arrowType() const
00056 {
00057     return d->arrow;
00058 }
00059 
00060 void KArrowButton::drawButton(QPainter *p)
00061 {
00062     const unsigned int arrowSize = 8;
00063     const unsigned int margin = 2;
00064     
00065         p->fillRect( rect(), colorGroup().brush( QColorGroup::Background ) );
00066     style().drawPrimitive( QStyle::PE_Panel, p, QRect( 0, 0, width(), height() ),
00067                    colorGroup(), 
00068                    isDown() ? QStyle::Style_Sunken : QStyle::Style_Default,
00069                    QStyleOption( 2, 0 ) );
00070 
00071     if (static_cast<unsigned int>(width()) < arrowSize + margin ||
00072         static_cast<unsigned int>(height()) < arrowSize + margin)
00073         return; // don't draw arrows if we are too small
00074 
00075     unsigned int x = 0, y = 0;
00076     if (d->arrow == DownArrow) {
00077         x = (width() - arrowSize) / 2;
00078         y = height() - (arrowSize + margin);
00079     } else if (d->arrow == UpArrow) {
00080         x = (width() - arrowSize) / 2;
00081         y = margin;
00082     } else if (d->arrow == RightArrow) {
00083         x = width() - (arrowSize + margin);
00084         y = (height() - arrowSize) / 2;
00085     } else { // arrowType == LeftArrow
00086         x = margin;
00087         y = (height() - arrowSize) / 2;
00088     }
00089 
00090     if (isDown()) {
00091         x++;
00092         y++;
00093     }
00094 
00095     QStyle::PrimitiveElement e = QStyle::PE_ArrowLeft;
00096     switch (d->arrow)
00097     {
00098         case Qt::LeftArrow: e = QStyle::PE_ArrowLeft; break;
00099         case Qt::RightArrow: e = QStyle::PE_ArrowRight; break;
00100         case Qt::UpArrow: e = QStyle::PE_ArrowUp; break;
00101         case Qt::DownArrow: e = QStyle::PE_ArrowDown; break;
00102     }
00103     int flags = QStyle::Style_Enabled;
00104     if ( isDown() )
00105         flags |= QStyle::Style_Down;
00106     style().drawPrimitive( e, p, QRect( QPoint( x, y ), QSize( arrowSize, arrowSize ) ),
00107                    colorGroup(), flags );
00108 }
00109 
00110 void KArrowButton::virtual_hook( int, void* )
00111 { /*BASE::virtual_hook( id, data );*/ }
00112 
00113 #include "karrowbutton.moc"
kdeui

karrowbutton.cpp

kdeui

API Reference
