plasma-framework/widgets/lineedit.cpp

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/*
* Copyright 2007 by Alexander Wiedenbruch <mail@wiedenbruch.de>
*
* 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 "lineedit.h"
#include <QStyleOptionFrameV2>
#include <QTextDocument>
#include <QKeyEvent>
#include <QPainter>
#include <KDebug>
#include "plasma/layouts/layout.h"
namespace Plasma
{
class LineEdit::Private
{
public:
Private()
: styled(true), multiline(false) {}
QString defaultText;
QString oldText;
QString defaultTextPlain;
bool styled;
bool multiline;
bool shouldPaint(QPainter *painter, const QTransform &transform);
};
bool LineEdit::Private::shouldPaint(QPainter *painter, const QTransform &transform)
{
qreal zoomLevel = painter->transform().m11() / transform.m11();
//return zoomLevel == scalingFactor(Plasma::DesktopZoom);
return true;
}
LineEdit::LineEdit(QGraphicsItem *parent)
: QGraphicsTextItem(parent),
d(new Private())
{
setTextInteractionFlags(Qt::TextEditorInteraction);
setCursor(Qt::IBeamCursor);
setFlag(QGraphicsItem::ItemIsSelectable);
}
LineEdit::~LineEdit()
{
delete d;
}
void LineEdit::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
//TODO: Deal with paint and shouldPaint, since they are just copies of the ones in Widget
if (d->shouldPaint(painter, transform())) {
paintWidget(painter, option, widget);
}
return;
}
void LineEdit::paintWidget(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
QStyleOptionFrameV2 panel;
panel.initFrom(widget);
panel.state = option->state;
panel.rect = boundingRect().toRect();
if(d->styled) {
widget->style()->drawPrimitive(QStyle::PE_PanelLineEdit, &panel, painter, widget);
widget->style()->drawPrimitive(QStyle::PE_FrameLineEdit, &panel, painter, widget);
}
// QGraphicsTextItem paints a black frame when it has focus
// and is selected. We want to use our own frame, so we
// clear these flags.
QStyleOptionGraphicsItem *style = const_cast<QStyleOptionGraphicsItem*>(option);
style->state &= ~(QStyle::State_Selected | QStyle::State_HasFocus);
QGraphicsTextItem::paint(painter, style, widget);
}
void LineEdit::dataUpdated(const QString&, const DataEngine::Data& data)
{
DataEngine::DataIterator it(data);
QString text;
while (it.hasNext()) {
it.next();
if (it.value().canConvert(QVariant::String)) {
text.append(QString("<p><b>%1</b>: %2</p>").arg(it.key(), it.value().toString()));
}
}
setHtml(text);
}
void LineEdit::setMultiLine(bool multi)
{
d->multiline = multi;
}
bool LineEdit::multiLine() const
{
return d->multiline;
}
void LineEdit::setStyled(bool style)
{
d->styled = style;
}
bool LineEdit::styled() const
{
return d->styled;
}
Qt::Orientations LineEdit::expandingDirections() const
{
return Qt::Vertical;
}
QSizeF LineEdit::minimumSize() const
{
return boundingRect().size();
}
QSizeF LineEdit::maximumSize() const
{
return minimumSize();
}
bool LineEdit::hasHeightForWidth() const
{
return true;
}
qreal LineEdit::heightForWidth(qreal w) const
{
QTextDocument* doc = document();
doc->setTextWidth(w);
qreal height = doc->size().height();
kDebug() << "LineEdit::heightForWidth(" << w << ") is " << height;
return height;
}
bool LineEdit::hasWidthForHeight() const
{
return false;
}
qreal LineEdit::widthForHeight(qreal h) const
{
return 0;
}
QRectF LineEdit::geometry() const
{
return QRectF(pos(),boundingRect().size());
}
void LineEdit::setGeometry(const QRectF& geometry)
{
prepareGeometryChange();
setTextWidth(geometry.width());
setPos(geometry.topLeft());
update();
}
void LineEdit::updateGeometry()
{
if (managingLayout()) {
managingLayout()->invalidate();
} else {
setGeometry(QRectF(pos(), sizeHint()));
}
}
QSizeF LineEdit::sizeHint() const
{
return document()->size();
}
void LineEdit::setDefaultText(const QString &text)
{
d->defaultText = text.simplified();
d->defaultText = QString("<font color=\"gray\">") + d->defaultText + QString("</font>");
QGraphicsTextItem::setHtml(d->defaultText);
d->defaultTextPlain = QGraphicsTextItem::toPlainText();
}
const QString LineEdit::toHtml()
{
if (QGraphicsTextItem::toHtml() == d->defaultText) {
return QString();
} else {
return QGraphicsTextItem::toHtml();
}
}
const QString LineEdit::toPlainText()
{
if (QGraphicsTextItem::toPlainText() == d->defaultText) {
return QString();
} else {
return QGraphicsTextItem::toPlainText();
}
}
void LineEdit::keyPressEvent(QKeyEvent *event)
{
if ( !d->multiline && (event->key() == Qt::Key_Enter || event->key() == Qt::Key_Return)) {
emit editingFinished();
event->accept();
} else {
QGraphicsTextItem::keyPressEvent(event); //let QT handle other keypresses
}
if (QGraphicsTextItem::toHtml() != d->oldText) {
d->oldText = QGraphicsTextItem::toHtml();
emit textChanged(QGraphicsTextItem::toHtml());
}
// if (QGraphicsTextItem::toPlainText().simplified().isEmtpy())
// QGraphicsTextItem::setHtml(d->defaultText);
}
void LineEdit::focusInEvent(QFocusEvent *event)
{
if (QGraphicsTextItem::toPlainText() == d->defaultTextPlain) {
QGraphicsTextItem::setHtml(QString());
}
QGraphicsTextItem::focusInEvent(event);
}
void LineEdit::focusOutEvent(QFocusEvent *event)
{
if (QGraphicsTextItem::toPlainText().isEmpty()) {
QGraphicsTextItem::setHtml(d->defaultText);
}
QGraphicsTextItem::focusOutEvent(event);
}
} // namespace Plasma
#include "lineedit.moc"