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Plasma

label.cpp

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00001 /*
00002  *   Copyright 2008 Aaron Seigo <aseigo@kde.org>
00003  *
00004  *   This program is free software; you can redistribute it and/or modify
00005  *   it under the terms of the GNU Library General Public License as
00006  *   published by the Free Software Foundation; either version 2, or
00007  *   (at your option) any later version.
00008  *
00009  *   This program 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
00012  *   GNU General Public License for more details
00013  *
00014  *   You should have received a copy of the GNU Library General Public
00015  *   License along with this program; if not, write to the
00016  *   Free Software Foundation, Inc.,
00017  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
00018  */
00019 
00020 #include "label.h"
00021 
00022 #include <QLabel>
00023 #include <QPainter>
00024 #include <QDir>
00025 
00026 #include <kmimetype.h>
00027 #include <kglobalsettings.h>
00028 #include <kcolorscheme.h>
00029 
00030 #include "theme.h"
00031 #include "svg.h"
00032 
00033 namespace Plasma
00034 {
00035 
00036 class LabelPrivate
00037 {
00038 public:
00039     LabelPrivate(Label *label)
00040         : q(label),
00041           svg(0)
00042     {
00043     }
00044 
00045     ~LabelPrivate()
00046     {
00047         delete svg;
00048     }
00049 
00050     void setPixmap()
00051     {
00052         if (imagePath.isEmpty()) {
00053             delete svg;
00054             svg = 0;
00055             return;
00056         }
00057 
00058         KMimeType::Ptr mime = KMimeType::findByPath(absImagePath);
00059         QPixmap pm(q->size().toSize());
00060 
00061         if (mime->is("image/svg+xml") || mime->is("image/svg+xml-compressed")) {
00062             if (!svg || svg->imagePath() != absImagePath) {
00063                 delete svg;
00064                 svg = new Svg();
00065                 svg->setImagePath(imagePath);
00066                 QObject::connect(svg, SIGNAL(repaintNeeded()), q, SLOT(setPixmap()));
00067             }
00068 
00069             QPainter p(&pm);
00070             svg->paint(&p, pm.rect());
00071         } else {
00072             delete svg;
00073             svg = 0;
00074             pm = QPixmap(absImagePath);
00075         }
00076 
00077         static_cast<QLabel*>(q->widget())->setPixmap(pm);
00078     }
00079 
00080     void setPalette()
00081     {
00082         QLabel *native = q->nativeWidget();
00083         QColor color = Theme::defaultTheme()->color(Theme::TextColor);
00084         QPalette p = native->palette();
00085         p.setColor(QPalette::Normal, QPalette::WindowText, color);
00086         p.setColor(QPalette::Inactive, QPalette::WindowText, color);
00087 
00088         KColorScheme colorScheme(QPalette::Active, KColorScheme::View, Plasma::Theme::defaultTheme()->colorScheme());
00089         p.setColor(QPalette::Normal, QPalette::Link, colorScheme.foreground(KColorScheme::LinkText).color());
00090         p.setColor(QPalette::Normal, QPalette::LinkVisited, colorScheme.foreground(KColorScheme::VisitedText).color());
00091         native->setPalette(p);
00092         native->setFont(Plasma::Theme::defaultTheme()->font(Plasma::Theme::DefaultFont));
00093     }
00094 
00095     Label *q;
00096     QString imagePath;
00097     QString absImagePath;
00098     Svg *svg;
00099 };
00100 
00101 Label::Label(QGraphicsWidget *parent)
00102     : QGraphicsProxyWidget(parent),
00103       d(new LabelPrivate(this))
00104 {
00105     QLabel *native = new QLabel;
00106     connect(native, SIGNAL(linkActivated(QString)), this, SIGNAL(linkActivated(QString)));
00107     connect(native, SIGNAL(linkHovered(QString)), this, SIGNAL(linkHovered(QString)));
00108 
00109     connect(Theme::defaultTheme(), SIGNAL(themeChanged()), this, SLOT(setPalette()));
00110     connect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()), this, SLOT(setPalette()));
00111 
00112     native->setAttribute(Qt::WA_NoSystemBackground);
00113     native->setWordWrap(true);
00114     setWidget(native);
00115     d->setPalette();
00116 }
00117 
00118 Label::~Label()
00119 {
00120     delete d;
00121 }
00122 
00123 void Label::setText(const QString &text)
00124 {
00125     static_cast<QLabel*>(widget())->setText(text);
00126 }
00127 
00128 QString Label::text() const
00129 {
00130     return static_cast<QLabel*>(widget())->text();
00131 }
00132 
00133 void Label::setImage(const QString &path)
00134 {
00135     if (d->imagePath == path) {
00136         return;
00137     }
00138 
00139     delete d->svg;
00140     d->svg = 0;
00141     d->imagePath = path;
00142 
00143     bool absolutePath = !path.isEmpty() &&
00144                         #ifdef Q_WS_WIN
00145                             !QDir::isRelativePath(path)
00146                         #else
00147                             (path[0] == '/' || path.startsWith(":/"))
00148                         #endif
00149         ;
00150 
00151     if (absolutePath) {
00152         d->absImagePath = path;
00153     } else {
00154         //TODO: package support
00155         d->absImagePath = Theme::defaultTheme()->imagePath(path);
00156     }
00157 
00158     d->setPixmap();
00159 }
00160 
00161 QString Label::image() const
00162 {
00163     return d->imagePath;
00164 }
00165 
00166 void Label::setScaledContents(bool scaled)
00167 {
00168     static_cast<QLabel*>(widget())->setScaledContents(scaled);
00169 }
00170 
00171 bool Label::hasScaledContents() const
00172 {
00173     return static_cast<QLabel*>(widget())->hasScaledContents();
00174 }
00175 
00176 void Label::setAlignment(Qt::Alignment alignment)
00177 {
00178     nativeWidget()->setAlignment(alignment);
00179 }
00180 
00181 Qt::Alignment Label::alignment() const
00182 {
00183     return nativeWidget()->alignment();
00184 }
00185 
00186 void Label::setStyleSheet(const QString &stylesheet)
00187 {
00188     widget()->setStyleSheet(stylesheet);
00189 }
00190 
00191 QString Label::styleSheet()
00192 {
00193     return widget()->styleSheet();
00194 }
00195 
00196 QLabel *Label::nativeWidget() const
00197 {
00198     return static_cast<QLabel*>(widget());
00199 }
00200 
00201 void Label::dataUpdated(const QString &sourceName, const Plasma::DataEngine::Data &data)
00202 {
00203     Q_UNUSED(sourceName);
00204 
00205     QStringList texts;
00206     foreach (const QVariant &v, data) {
00207         if (v.canConvert(QVariant::String)) {
00208             texts << v.toString();
00209         }
00210     }
00211 
00212     setText(texts.join(" "));
00213 }
00214 
00215 void Label::resizeEvent(QGraphicsSceneResizeEvent *event)
00216 {
00217     d->setPixmap();
00218     QGraphicsProxyWidget::resizeEvent(event);
00219 }
00220 
00221 } // namespace Plasma
00222 
00223 #include <label.moc>
00224 

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