355 lines
8.9 KiB
C++
355 lines
8.9 KiB
C++
/*
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* Copyright 2008 Aaron Seigo <aseigo@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "label.h"
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#include <QApplication>
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#include <QDir>
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#include <QGraphicsSceneMouseEvent>
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#include <QLabel>
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#include <QMenu>
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#include <QPainter>
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#include <QStyleOptionGraphicsItem>
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#include <kcolorscheme.h>
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#include <kglobalsettings.h>
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#include <qmimedatabase.h>
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#include "private/themedwidgetinterface_p.h"
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#include "svg.h"
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#include "theme.h"
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namespace Plasma
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{
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class LabelPrivate : public ThemedWidgetInterface<Label>
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{
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public:
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LabelPrivate(Label *label)
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: ThemedWidgetInterface<Label>(label),
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svg(0),
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textSelectable(false),
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hasLinks(false)
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{
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}
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~LabelPrivate()
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{
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delete svg;
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}
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void setPixmap()
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{
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if (imagePath.isEmpty()) {
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delete svg;
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svg = 0;
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return;
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}
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QMimeDatabase db;
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QMimeType mime = db.mimeTypeForFile(absImagePath);
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QPixmap pm(q->size().toSize());
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if (mime.inherits("image/svg+xml") || mime.inherits("image/svg+xml-compressed")) {
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if (!svg || svg->imagePath() != absImagePath) {
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delete svg;
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svg = new Svg();
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svg->setImagePath(imagePath);
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QObject::connect(svg, SIGNAL(repaintNeeded()), q, SLOT(setPixmap()));
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}
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QPainter p(&pm);
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svg->paint(&p, pm.rect());
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} else {
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delete svg;
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svg = 0;
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pm = QPixmap(absImagePath);
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}
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static_cast<QLabel*>(q->widget())->setPixmap(pm);
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}
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QString imagePath;
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QString absImagePath;
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Svg *svg;
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bool textSelectable : 1;
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bool hasLinks : 1;
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};
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Label::Label(QGraphicsWidget *parent)
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: QGraphicsProxyWidget(parent),
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d(new LabelPrivate(this))
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{
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QLabel *native = new QLabel;
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native->setWindowFlags(native->windowFlags()|Qt::BypassGraphicsProxyWidget);
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native->setAttribute(Qt::WA_NoSystemBackground);
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native->setWordWrap(true);
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native->setWindowIcon(QIcon());
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connect(native, SIGNAL(linkActivated(QString)), this, SIGNAL(linkActivated(QString)));
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connect(native, SIGNAL(linkHovered(QString)), this, SIGNAL(linkHovered(QString)));
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d->setWidget(native);
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d->initTheming();
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}
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Label::~Label()
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{
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delete d;
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}
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void Label::setText(const QString &text)
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{
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d->hasLinks = text.contains("<a ", Qt::CaseInsensitive);
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static_cast<QLabel*>(widget())->setText(text);
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updateGeometry();
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}
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QString Label::text() const
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{
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return static_cast<QLabel*>(widget())->text();
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}
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void Label::setImage(const QString &path)
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{
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if (d->imagePath == path) {
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return;
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}
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delete d->svg;
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d->svg = 0;
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d->imagePath = path;
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bool absolutePath = !path.isEmpty() &&
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#ifdef Q_WS_WIN
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!QDir::isRelativePath(path)
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#else
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(path[0] == '/' || path.startsWith(QLatin1String(":/")))
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#endif
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;
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if (absolutePath) {
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d->absImagePath = path;
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} else {
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//TODO: package support
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d->absImagePath = Theme::defaultTheme()->imagePath(path);
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}
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d->setPixmap();
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}
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QString Label::image() const
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{
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return d->imagePath;
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}
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void Label::setScaledContents(bool scaled)
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{
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static_cast<QLabel*>(widget())->setScaledContents(scaled);
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}
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bool Label::hasScaledContents() const
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{
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return static_cast<QLabel*>(widget())->hasScaledContents();
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}
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void Label::setTextSelectable(bool enable)
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{
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if (enable) {
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nativeWidget()->setTextInteractionFlags(Qt::TextBrowserInteraction);
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} else {
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nativeWidget()->setTextInteractionFlags(Qt::LinksAccessibleByMouse | Qt::LinksAccessibleByKeyboard);
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}
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d->textSelectable = enable;
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}
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bool Label::textSelectable() const
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{
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return d->textSelectable;
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}
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void Label::setAlignment(Qt::Alignment alignment)
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{
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nativeWidget()->setAlignment(alignment);
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}
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Qt::Alignment Label::alignment() const
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{
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return nativeWidget()->alignment();
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}
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void Label::setWordWrap(bool wrap)
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{
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nativeWidget()->setWordWrap(wrap);
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}
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bool Label::wordWrap() const
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{
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return nativeWidget()->wordWrap();
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}
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void Label::setStyleSheet(const QString &stylesheet)
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{
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widget()->setStyleSheet(stylesheet);
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}
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QString Label::styleSheet()
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{
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return widget()->styleSheet();
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}
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QLabel *Label::nativeWidget() const
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{
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return static_cast<QLabel*>(widget());
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}
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void Label::dataUpdated(const QString &sourceName, const Plasma::DataEngine::Data &data)
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{
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Q_UNUSED(sourceName);
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QStringList texts;
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foreach (const QVariant &v, data) {
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if (v.canConvert(QVariant::String)) {
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texts << v.toString();
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}
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}
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setText(texts.join(" "));
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}
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void Label::contextMenuEvent(QGraphicsSceneContextMenuEvent *event)
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{
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if (d->textSelectable || d->hasLinks){
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QContextMenuEvent contextMenuEvent(QContextMenuEvent::Reason(event->reason()),
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event->pos().toPoint(), event->screenPos(), event->modifiers());
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QApplication::sendEvent(nativeWidget(), &contextMenuEvent);
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}else{
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event->ignore();
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}
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}
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void Label::resizeEvent(QGraphicsSceneResizeEvent *event)
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{
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d->setPixmap();
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QGraphicsProxyWidget::resizeEvent(event);
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}
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void Label::mousePressEvent(QGraphicsSceneMouseEvent *event)
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{
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QGraphicsProxyWidget::mousePressEvent(event);
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//FIXME: when QTextControl accept()s mouse press events (as of Qt 4.6.2, it processes them
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//but never marks them as accepted) the following event->accept() can be removed
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if (d->textSelectable || d->hasLinks) {
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event->accept();
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}
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}
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void Label::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
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{
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if (d->textSelectable) {
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QGraphicsProxyWidget::mouseMoveEvent(event);
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}
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}
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void Label::paint(QPainter *painter,
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const QStyleOptionGraphicsItem *option,
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QWidget *widget)
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{
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QLabel *native = nativeWidget();
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QFontMetrics fm(native->font());
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//indirect painting still used for fade out
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if (native->wordWrap() || native->text().isEmpty() || size().width() >= fm.width(native->text())) {
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QGraphicsProxyWidget::paint(painter, option, widget);
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} else {
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const int gradientLength = 25;
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QPixmap buffer(contentsRect().size().toSize());
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buffer.fill(Qt::transparent);
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QPainter buffPainter(&buffer);
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QGraphicsProxyWidget::paint(&buffPainter, option, widget);
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QLinearGradient gr;
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buffPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
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buffPainter.setPen(Qt::NoPen);
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if (option->direction == Qt::LeftToRight) {
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gr.setStart(size().width()-gradientLength, 0);
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gr.setFinalStop(size().width(), 0);
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gr.setColorAt(0, Qt::black);
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gr.setColorAt(1, Qt::transparent);
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buffPainter.setBrush(gr);
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buffPainter.drawRect(QRect(gr.start().toPoint(), QSize(gradientLength, size().height())));
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} else {
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gr.setStart(0, 0);
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gr.setFinalStop(gradientLength, 0);
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gr.setColorAt(0, Qt::transparent);
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gr.setColorAt(1, Qt::black);
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buffPainter.setBrush(gr);
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buffPainter.drawRect(QRect(0, 0, gradientLength, size().height()));
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}
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buffPainter.end();
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painter->drawPixmap(contentsRect(), buffer, buffer.rect());
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}
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}
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void Label::changeEvent(QEvent *event)
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{
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d->changeEvent(event);
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QGraphicsProxyWidget::changeEvent(event);
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}
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bool Label::event(QEvent *event)
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{
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d->event(event);
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return QGraphicsProxyWidget::event(event);
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}
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QVariant Label::itemChange(GraphicsItemChange change, const QVariant & value)
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{
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if (change == QGraphicsItem::ItemCursorHasChanged) {
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nativeWidget()->setCursor(cursor());
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}
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return QGraphicsWidget::itemChange(change, value);
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}
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QSizeF Label::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
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{
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if (sizePolicy().verticalPolicy() == QSizePolicy::Fixed) {
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return QGraphicsProxyWidget::sizeHint(Qt::PreferredSize, constraint);
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} else {
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return QGraphicsProxyWidget::sizeHint(which, constraint);
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}
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}
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} // namespace Plasma
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#include "moc_label.cpp"
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