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k3activelabel.cpp

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00001 /*  This file is part of the KDE libraries
00002     Copyright (C) 1999 Waldo Bastian (bastian@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 as published by the Free Software Foundation; version 2
00007     of the License.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public License
00015     along with this library; see the file COPYING.LIB.  If not, write to
00016     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017     Boston, MA 02110-1301, USA.
00018 */
00019 
00020 #include "k3activelabel.h"
00021 
00022 #include <Q3SimpleRichText>
00023 #include <QFocusEvent>
00024 
00025 #include <ktoolinvocation.h>
00026 
00027 class K3ActiveLabelPrivate
00028 {
00029 public:
00030     K3ActiveLabelPrivate(K3ActiveLabel *qq);
00031 
00032     void updatePalette();
00033 
00034     K3ActiveLabel *q;
00035 };
00036 
00037 K3ActiveLabelPrivate::K3ActiveLabelPrivate(K3ActiveLabel *qq)
00038     : q(qq)
00039 {
00040    q->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
00041    q->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
00042    q->setFrameStyle(QFrame::NoFrame);
00043    q->setFocusPolicy(Qt::TabFocus);
00044    updatePalette();
00045 }
00046 
00047 void K3ActiveLabelPrivate::updatePalette()
00048 {
00049     QPalette p = q->palette();
00050     p.setBrush(QPalette::Base, p.brush(QPalette::Normal, QPalette::Background));
00051     p.setColor(QPalette::Text, p.color(QPalette::Normal, QPalette::Foreground));
00052     q->setPalette(p);
00053 }
00054 
00055 K3ActiveLabel::K3ActiveLabel(QWidget * parent)
00056  : KTextBrowser(parent),d(new K3ActiveLabelPrivate(this))
00057 {
00058 }
00059 
00060 K3ActiveLabel::K3ActiveLabel(const QString &text, QWidget * parent)
00061  : KTextBrowser(parent),d(new K3ActiveLabelPrivate(this))
00062 {
00063     setHtml(text);
00064 }
00065 
00066 K3ActiveLabel::~K3ActiveLabel()
00067 {
00068     delete d;
00069 }
00070 
00071 void K3ActiveLabel::focusInEvent( QFocusEvent* fe )
00072 {
00073    KTextBrowser::focusInEvent(fe);
00074    if(fe->reason() == Qt::TabFocusReason || fe->reason() == Qt::BacktabFocusReason)
00075       selectAll();
00076 }
00077 
00078 void K3ActiveLabel::focusOutEvent( QFocusEvent* fe )
00079 {
00080    KTextBrowser::focusOutEvent(fe);
00081    if(fe->reason() == Qt::TabFocusReason || fe->reason() == Qt::BacktabFocusReason)
00082       selectAll(); //TODO reimplement: deselect text
00083 }
00084 
00085 void K3ActiveLabel::keyPressEvent( QKeyEvent *e )
00086 {
00087     switch ( e->key() )
00088     {
00089     case Qt::Key_Down:
00090     case Qt::Key_Up:
00091     case Qt::Key_Left:
00092     case Qt::Key_Right:
00093         // jump over QTextEdit's key navigation breakage.
00094         // we're not interested in keyboard navigation within the text
00095         QWidget::keyPressEvent( e );
00096         break;
00097     default:
00098         KTextBrowser::keyPressEvent( e );
00099     }
00100 }
00101 
00102 bool K3ActiveLabel::event(QEvent *e)
00103 {
00104     // call the base implementation first so it updates
00105     // our palette
00106     const bool result = KTextBrowser::event(e);
00107     if (e->type() == QEvent::ApplicationPaletteChange) {
00108         d->updatePalette();
00109     }
00110     return result;
00111 }
00112 
00113 QSize K3ActiveLabel::minimumSizeHint() const
00114 {
00115    QSize ms = minimumSize();
00116    if ((ms.width() > 0) && (ms.height() > 0))
00117       return ms;
00118 
00119    int w = 400;
00120    if (ms.width() > 0)
00121       w = ms.width();
00122 
00123    QString txt = toHtml();
00124    Q3SimpleRichText rt(txt, font());
00125    rt.setWidth(w - 2*frameWidth() - 10);
00126    w = 10 + rt.widthUsed() + 2*frameWidth();
00127    if (w < ms.width())
00128       w = ms.width();
00129    int h = rt.height() + 2*frameWidth();
00130    if ( h < ms.height())
00131       h = ms.height();
00132 
00133    return QSize(w, h);
00134 }
00135 
00136 QSize K3ActiveLabel::sizeHint() const
00137 {
00138    return minimumSizeHint();
00139 }
00140 
00141 #include "k3activelabel.moc"

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