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"