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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 
00029 #include "theme.h"
00030 #include "svg.h"
00031 
00032 namespace Plasma
00033 {
00034 
00035 class LabelPrivate
00036 {
00037 public:
00038     LabelPrivate(Label *label)
00039         : q(label),
00040           svg(0)
00041     {
00042     }
00043 
00044     ~LabelPrivate()
00045     {
00046         delete svg;
00047     }
00048 
00049     void setPixmap(Label *q)
00050     {
00051         if (imagePath.isEmpty()) {
00052             return;
00053         }
00054 
00055         KMimeType::Ptr mime = KMimeType::findByPath(absImagePath);
00056         QPixmap pm(q->size().toSize());
00057 
00058         if (mime->is("image/svg+xml") || mime->is("application/x-gzip")) {
00059             svg = new Svg();
00060             svg->setImagePath(imagePath);
00061             QPainter p(&pm);
00062             svg->paint(&p, pm.rect());
00063         } else {
00064             pm = QPixmap(absImagePath);
00065         }
00066 
00067         static_cast<QLabel*>(q->widget())->setPixmap(pm);
00068     }
00069 
00070     void setPalette()
00071     {
00072         QLabel *native = q->nativeWidget();
00073         QColor color = Theme::defaultTheme()->color(Theme::TextColor);
00074         QPalette p = native->palette();
00075         p.setColor(QPalette::Normal, QPalette::WindowText, color);
00076         p.setColor(QPalette::Inactive, QPalette::WindowText, color);
00077         native->setPalette(p);
00078         native->setFont(Plasma::Theme::defaultTheme()->font(Plasma::Theme::DefaultFont));
00079     }
00080 
00081     Label *q;
00082     QString imagePath;
00083     QString absImagePath;
00084     Svg *svg;
00085 };
00086 
00087 Label::Label(QGraphicsWidget *parent)
00088     : QGraphicsProxyWidget(parent),
00089       d(new LabelPrivate(this))
00090 {
00091     QLabel *native = new QLabel;
00092     connect(native, SIGNAL(linkActivated(QString)), this, SIGNAL(linkActivated(QString)));
00093 
00094     connect(Theme::defaultTheme(), SIGNAL(themeChanged()), this, SLOT(setPalette()));
00095     connect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()), this, SLOT(setPalette()));
00096 
00097     native->setAttribute(Qt::WA_NoSystemBackground);
00098     native->setWordWrap(true);
00099     setWidget(native);
00100     d->setPalette();
00101 }
00102 
00103 Label::~Label()
00104 {
00105     delete d;
00106 }
00107 
00108 void Label::setText(const QString &text)
00109 {
00110     static_cast<QLabel*>(widget())->setText(text);
00111 }
00112 
00113 QString Label::text() const
00114 {
00115     return static_cast<QLabel*>(widget())->text();
00116 }
00117 
00118 void Label::setImage(const QString &path)
00119 {
00120     if (d->imagePath == path) {
00121         return;
00122     }
00123 
00124     delete d->svg;
00125     d->svg = 0;
00126     d->imagePath = path;
00127 
00128     bool absolutePath = !path.isEmpty() &&
00129                         #ifdef Q_WS_WIN
00130                             !QDir::isRelativePath(path)
00131                         #else
00132                             (path[0] == '/' || path.startsWith(":/"))
00133                         #endif
00134         ;
00135 
00136     if (absolutePath) {
00137         d->absImagePath = path;
00138     } else {
00139         //TODO: package support
00140         d->absImagePath = Theme::defaultTheme()->imagePath(path);
00141     }
00142 
00143     d->setPixmap(this);
00144 }
00145 
00146 QString Label::image() const
00147 {
00148     return d->imagePath;
00149 }
00150 
00151 void Label::setScaledContents(bool scaled)
00152 {
00153     static_cast<QLabel*>(widget())->setScaledContents(scaled);
00154 }
00155 
00156 bool Label::hasScaledContents() const
00157 {
00158     return static_cast<QLabel*>(widget())->hasScaledContents();
00159 }
00160 
00161 void Label::setAlignment(Qt::Alignment alignment)
00162 {
00163     nativeWidget()->setAlignment(alignment);
00164 }
00165 
00166 Qt::Alignment Label::alignment() const
00167 {
00168     return nativeWidget()->alignment();
00169 }
00170 
00171 void Label::setStyleSheet(const QString &stylesheet)
00172 {
00173     widget()->setStyleSheet(stylesheet);
00174 }
00175 
00176 QString Label::styleSheet()
00177 {
00178     return widget()->styleSheet();
00179 }
00180 
00181 QLabel *Label::nativeWidget() const
00182 {
00183     return static_cast<QLabel*>(widget());
00184 }
00185 
00186 void Label::dataUpdated(const QString &sourceName, const Plasma::DataEngine::Data &data)
00187 {
00188     Q_UNUSED(sourceName);
00189 
00190     QStringList texts;
00191     foreach (const QVariant &v, data) {
00192         if (v.canConvert(QVariant::String)) {
00193             texts << v.toString();
00194         }
00195     }
00196 
00197     setText(texts.join(" "));
00198 }
00199 
00200 void Label::resizeEvent(QGraphicsSceneResizeEvent *event)
00201 {
00202     d->setPixmap(this);
00203     QGraphicsProxyWidget::resizeEvent(event);
00204 }
00205 
00206 } // namespace Plasma
00207 
00208 #include <label.moc>
00209 

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