plasma-framework/widgets/textbrowser.cpp

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/*
* Copyright 2009 Marco Martin <notmart@gmail.com>
*
* 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 "textbrowser.h"
#include <QPainter>
#include <QScrollBar>
#include <QGraphicsSceneWheelEvent>
#include <kmimetype.h>
#include <ktextbrowser.h>
#include "plasma/theme.h"
#include "plasma/svg.h"
#include "private/style_p.h"
namespace Plasma
{
class TextBrowserPrivate
{
public:
TextBrowserPrivate(TextBrowser *browser)
: q(browser),
native(0),
savedMinimumHeight(0),
savedMaximumHeight(QWIDGETSIZE_MAX),
wasNotFixed(true),
customFont(false)
{
}
void setFixedHeight()
{
if (native && native->document() &&
q->sizePolicy().verticalPolicy() == QSizePolicy::Fixed &&
native->verticalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) {
native->document()->setTextWidth(q->size().width());
QSize s = native->document()->size().toSize();
if (wasNotFixed) {
savedMinimumHeight = q->minimumHeight();
savedMaximumHeight = q->maximumHeight();
wasNotFixed = false;
}
q->setMinimumHeight(s.height());
q->setMaximumHeight(s.height());
} else if (!wasNotFixed) {
q->setMinimumHeight(savedMinimumHeight);
q->setMaximumHeight(savedMaximumHeight);
wasNotFixed = true;
}
}
void setPalette()
{
KTextBrowser *native = q->nativeWidget();
QColor color = Theme::defaultTheme()->color(Theme::TextColor);
QPalette p = native->palette();
p.setColor(QPalette::Normal, QPalette::Text, color);
p.setColor(QPalette::Inactive, QPalette::Text, color);
p.setColor(QPalette::Normal, QPalette::ButtonText, color);
p.setColor(QPalette::Inactive, QPalette::ButtonText, color);
p.setColor(QPalette::Normal, QPalette::Base, QColor(0,0,0,0));
p.setColor(QPalette::Inactive, QPalette::Base, QColor(0,0,0,0));
native->setPalette(p);
if (!customFont) {
q->nativeWidget()->setFont(Plasma::Theme::defaultTheme()->font(Plasma::Theme::DefaultFont));
}
}
TextBrowser *q;
KTextBrowser *native;
Plasma::Style::Ptr style;
int savedMinimumHeight;
int savedMaximumHeight;
bool wasNotFixed;
bool customFont;
};
TextBrowser::TextBrowser(QGraphicsWidget *parent)
: QGraphicsProxyWidget(parent),
d(new TextBrowserPrivate(this))
{
KTextBrowser *native = new KTextBrowser;
connect(native, SIGNAL(textChanged()), this, SIGNAL(textChanged()));
connect(native, SIGNAL(textChanged()), this, SLOT(setFixedHeight()));
setWidget(native);
d->native = native;
native->setAttribute(Qt::WA_NoSystemBackground);
native->setFrameShape(QFrame::NoFrame);
native->setTextBackgroundColor(Qt::transparent);
native->viewport()->setAutoFillBackground(false);
d->style = Plasma::Style::sharedStyle();
native->verticalScrollBar()->setStyle(d->style.data());
native->horizontalScrollBar()->setStyle(d->style.data());
connect(Theme::defaultTheme(), SIGNAL(themeChanged()),
this, SLOT(setPalette()));
}
TextBrowser::~TextBrowser()
{
delete d;
Plasma::Style::doneWithSharedStyle();
}
void TextBrowser::setText(const QString &text)
{
//FIXME I'm not certain about using only the html methods. look at this again later.
static_cast<KTextBrowser*>(widget())->setHtml(text);
}
QString TextBrowser::text() const
{
return static_cast<KTextBrowser*>(widget())->toHtml();
}
void TextBrowser::setHorizontalScrollBarPolicy(Qt::ScrollBarPolicy policy)
{
d->native->setHorizontalScrollBarPolicy(policy);
}
void TextBrowser::setVerticalScrollBarPolicy(Qt::ScrollBarPolicy policy)
{
d->native->setVerticalScrollBarPolicy(policy);
}
void TextBrowser::setStyleSheet(const QString &stylesheet)
{
widget()->setStyleSheet(stylesheet);
}
QString TextBrowser::styleSheet()
{
return widget()->styleSheet();
}
KTextBrowser *TextBrowser::nativeWidget() const
{
return static_cast<KTextBrowser*>(widget());
}
void TextBrowser::dataUpdated(const QString &sourceName, const Plasma::DataEngine::Data &data)
{
Q_UNUSED(sourceName)
KTextBrowser *te = nativeWidget();
te->clear();
foreach (const QVariant &v, data) {
if (v.canConvert(QVariant::String)) {
te->append(v.toString() + '\n');
}
}
}
void TextBrowser::resizeEvent(QGraphicsSceneResizeEvent *event)
{
d->setFixedHeight();
QGraphicsProxyWidget::resizeEvent(event);
}
void TextBrowser::wheelEvent(QGraphicsSceneWheelEvent *event)
{
if (d->native->verticalScrollBarPolicy() == Qt::ScrollBarAlwaysOff &&
d->native->horizontalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) {
event->ignore();
} else {
QGraphicsProxyWidget::wheelEvent(event);
}
}
void TextBrowser::changeEvent(QEvent *event)
{
if (event->type() == QEvent::FontChange) {
d->customFont = true;
nativeWidget()->setFont(font());
}
QGraphicsProxyWidget::changeEvent(event);
}
} // namespace Plasma
#include <textbrowser.moc>