plasma-framework/widgets/label.cpp
Marco Martin d6eb165ee5 setTextSelectable, to be able to select text XOR drag the widget with
the mouse

svn path=/trunk/KDE/kdelibs/; revision=1017058
2009-08-29 16:59:28 +00:00

284 lines
7.1 KiB
C++

/*
* Copyright 2008 Aaron Seigo <aseigo@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "label.h"
#include <QLabel>
#include <QPainter>
#include <QDir>
#include <QStyleOptionGraphicsItem>
#include <QGraphicsSceneMouseEvent>
#include <kmimetype.h>
#include <kglobalsettings.h>
#include <kcolorscheme.h>
#include "theme.h"
#include "svg.h"
namespace Plasma
{
class LabelPrivate
{
public:
LabelPrivate(Label *label)
: q(label),
svg(0)
{
}
~LabelPrivate()
{
delete svg;
}
void setPixmap(Label *q)
{
if (imagePath.isEmpty()) {
return;
}
KMimeType::Ptr mime = KMimeType::findByPath(absImagePath);
QPixmap pm(q->size().toSize());
if (mime->is("image/svg+xml") || mime->is("application/x-gzip")) {
svg = new Svg();
svg->setImagePath(imagePath);
QPainter p(&pm);
svg->paint(&p, pm.rect());
} else {
pm = QPixmap(absImagePath);
}
static_cast<QLabel*>(q->widget())->setPixmap(pm);
}
void setPalette()
{
QLabel *native = q->nativeWidget();
QColor color = Theme::defaultTheme()->color(Theme::TextColor);
QPalette p = native->palette();
p.setColor(QPalette::Normal, QPalette::WindowText, color);
p.setColor(QPalette::Inactive, QPalette::WindowText, color);
p.setColor(QPalette::Normal, QPalette::Link, Theme::defaultTheme()->color(Theme::LinkColor));
p.setColor(QPalette::Normal, QPalette::LinkVisited, Theme::defaultTheme()->color(Theme::VisitedLinkColor));
native->setPalette(p);
native->setFont(Plasma::Theme::defaultTheme()->font(Plasma::Theme::DefaultFont));
}
Label *q;
QString imagePath;
QString absImagePath;
Svg *svg;
bool textSelectable;
};
Label::Label(QGraphicsWidget *parent)
: QGraphicsProxyWidget(parent),
d(new LabelPrivate(this))
{
QLabel *native = new QLabel;
d->textSelectable = false;
connect(native, SIGNAL(linkActivated(QString)), this, SIGNAL(linkActivated(QString)));
connect(native, SIGNAL(linkHovered(QString)), this, SIGNAL(linkHovered(QString)));
connect(Theme::defaultTheme(), SIGNAL(themeChanged()), this, SLOT(setPalette()));
connect(KGlobalSettings::self(), SIGNAL(kdisplayPaletteChanged()), this, SLOT(setPalette()));
native->setAttribute(Qt::WA_NoSystemBackground);
native->setWordWrap(true);
setWidget(native);
d->setPalette();
}
Label::~Label()
{
delete d;
}
void Label::setText(const QString &text)
{
static_cast<QLabel*>(widget())->setText(text);
}
QString Label::text() const
{
return static_cast<QLabel*>(widget())->text();
}
void Label::setImage(const QString &path)
{
if (d->imagePath == path) {
return;
}
delete d->svg;
d->svg = 0;
d->imagePath = path;
bool absolutePath = !path.isEmpty() &&
#ifdef Q_WS_WIN
!QDir::isRelativePath(path)
#else
(path[0] == '/' || path.startsWith(":/"))
#endif
;
if (absolutePath) {
d->absImagePath = path;
} else {
//TODO: package support
d->absImagePath = Theme::defaultTheme()->imagePath(path);
}
d->setPixmap(this);
}
QString Label::image() const
{
return d->imagePath;
}
void Label::setScaledContents(bool scaled)
{
static_cast<QLabel*>(widget())->setScaledContents(scaled);
}
bool Label::hasScaledContents() const
{
return static_cast<QLabel*>(widget())->hasScaledContents();
}
void Label::setTextSelectable(bool enable)
{
d->textSelectable = enable;
}
bool Label::textSelectable() const
{
return d->textSelectable;
}
void Label::setAlignment(Qt::Alignment alignment)
{
nativeWidget()->setAlignment(alignment);
}
Qt::Alignment Label::alignment() const
{
return nativeWidget()->alignment();
}
void Label::setStyleSheet(const QString &stylesheet)
{
widget()->setStyleSheet(stylesheet);
}
QString Label::styleSheet()
{
return widget()->styleSheet();
}
QLabel *Label::nativeWidget() const
{
return static_cast<QLabel*>(widget());
}
void Label::dataUpdated(const QString &sourceName, const Plasma::DataEngine::Data &data)
{
Q_UNUSED(sourceName);
QStringList texts;
foreach (const QVariant &v, data) {
if (v.canConvert(QVariant::String)) {
texts << v.toString();
}
}
setText(texts.join(" "));
}
void Label::resizeEvent(QGraphicsSceneResizeEvent *event)
{
d->setPixmap(this);
QGraphicsProxyWidget::resizeEvent(event);
}
void Label::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if (!d->textSelectable) {
event->ignore();
} else {
QGraphicsProxyWidget::mousePressEvent(event);
}
}
void Label::paint(QPainter *painter,
const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
QLabel *native = nativeWidget();
QFontMetrics fm = native->font();
if (native->wordWrap() || native->text().isEmpty() || size().width() > fm.width(native->text())) {
QGraphicsProxyWidget::paint(painter, option, widget);
} else {
const int gradientLength = 25;
QPixmap buffer(size().toSize());
buffer.fill(Qt::transparent);
QPainter buffPainter(&buffer);
QGraphicsProxyWidget::paint(&buffPainter, option, widget);
QLinearGradient gr;
buffPainter.setCompositionMode(QPainter::CompositionMode_DestinationIn);
buffPainter.setPen(Qt::NoPen);
if (option->direction == Qt::LeftToRight) {
gr.setStart(size().width()-gradientLength, 0);
gr.setFinalStop(size().width(), 0);
gr.setColorAt(0, Qt::black);
gr.setColorAt(1, Qt::transparent);
buffPainter.setBrush(gr);
buffPainter.drawRect(QRect(gr.start().toPoint(), QSize(gradientLength, size().height())));
} else {
gr.setStart(0, 0);
gr.setFinalStop(gradientLength, 0);
gr.setColorAt(0, Qt::transparent);
gr.setColorAt(1, Qt::black);
buffPainter.setBrush(gr);
buffPainter.drawRect(QRect(0, 0, gradientLength, size().height()));
}
buffPainter.end();
painter->drawPixmap(buffer.rect(), buffer, buffer.rect());
}
}
} // namespace Plasma
#include <label.moc>