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 #if QT_VERSION < 300
00062         style().drawPanel(p, 0, 0, width(), height(), colorGroup(),
00063                         isDown(), 2, &colorGroup().brush(QColorGroup::Background));
00064 #else
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 #endif
00071 
00072         if (static_cast<unsigned int>(width()) < arrowSize + margin ||
00073             static_cast<unsigned int>(height()) < arrowSize + margin)
00074                 return; // don't draw arrows if we are too small
00075 
00076         unsigned int x = 0, y = 0;
00077         if (d->arrow == DownArrow) {
00078                 x = (width() - arrowSize) / 2;
00079                 y = height() - (arrowSize + margin);
00080         } else if (d->arrow == UpArrow) {
00081                 x = (width() - arrowSize) / 2;
00082                 y = margin;
00083         } else if (d->arrow == RightArrow) {
00084                 x = width() - (arrowSize + margin);
00085                 y = (height() - arrowSize) / 2;
00086         } else { // arrowType == LeftArrow
00087                 x = margin;
00088                 y = (height() - arrowSize) / 2;
00089         }
00090 
00091         if (isDown()) {
00092                 x++;
00093                 y++;
00094         }
00095 
00096 #if QT_VERSION < 300
00097         style().drawArrow(p, d->arrow, isDown(), x, y, arrowSize, arrowSize,
00098                         colorGroup(), true);
00099 #else
00100         QStyle::PrimitiveElement e = QStyle::PE_ArrowLeft;
00101         switch (d->arrow)
00102         {
00103                 case Qt::LeftArrow: e = QStyle::PE_ArrowLeft; break;
00104                 case Qt::RightArrow: e = QStyle::PE_ArrowRight; break;
00105                 case Qt::UpArrow: e = QStyle::PE_ArrowUp; break;
00106                 case Qt::DownArrow: e = QStyle::PE_ArrowDown; break;
00107         }
00108         int flags = QStyle::Style_Enabled;
00109         if ( isDown() )
00110                 flags |= QStyle::Style_Down;
00111         style().drawPrimitive( e, p, QRect( QPoint( x, y ), QSize( arrowSize, arrowSize ) ),
00112                                colorGroup(), flags );
00113 #endif
00114 }
00115 
00116 void KArrowButton::virtual_hook( int, void* )
00117 { /*BASE::virtual_hook( id, data );*/ }
00118 
00119 #include "karrowbutton.moc"
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This file is part of the documentation for kdelibs Version 3.1.5.
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