move into libplasma
svn path=/trunk/KDE/kdelibs/; revision=1183873
This commit is contained in:
Marco Martin
parent
bd5dd2a688
commit
90165f119a
225
widgets/declarativewidget.cpp
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225
widgets/declarativewidget.cpp
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/*
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* Copyright 2010 Marco Martin <mart@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 "declarativewidget.h"
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#include <QtDeclarative/QDeclarativeComponent>
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#include <QtDeclarative/QDeclarativeItem>
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#include <QtDeclarative/QDeclarativeEngine>
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#include <QtDeclarative/QDeclarativeContext>
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#include <QGraphicsLinearLayout>
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#include <QGraphicsScene>
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#include <QTimer>
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#include <KDebug>
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namespace Plasma
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{
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class DeclarativeWidgetPrivate
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{
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public:
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DeclarativeWidgetPrivate(DeclarativeWidget *parent)
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: q(parent),
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engine(0),
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component(0),
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root(0),
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delay(false)
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{
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}
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~DeclarativeWidgetPrivate()
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{
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}
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void errorPrint();
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void execute(const QString &fileName);
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void finishExecute();
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void scheduleExecutionEnd();
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DeclarativeWidget *q;
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QString qmlPath;
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QDeclarativeEngine* engine;
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QDeclarativeComponent* component;
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QObject *root;
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bool delay : 1;
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};
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void DeclarativeWidgetPrivate::errorPrint()
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{
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QString errorStr = "Error loading QML file.\n";
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if(component->isError()){
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QList<QDeclarativeError> errors = component->errors();
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foreach (const QDeclarativeError &error, errors) {
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errorStr += (error.line()>0?QString::number(error.line()) + ": ":"")
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+ error.description() + '\n';
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}
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}
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kWarning() << component->url().toString() + '\n' + errorStr;
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}
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void DeclarativeWidgetPrivate::execute(const QString &fileName)
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{
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if (fileName.isEmpty()) {
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kDebug() << "File name empty!";
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return;
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}
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if (engine) {
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delete engine;
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}
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if (component) {
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delete component;
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}
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engine = new QDeclarativeEngine(q);
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component = new QDeclarativeComponent(engine, fileName, q);
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if (delay) {
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QTimer::singleShot(0, q, SLOT(scheduleExecutionEnd()));
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} else {
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scheduleExecutionEnd();
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}
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}
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void DeclarativeWidgetPrivate::scheduleExecutionEnd()
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{
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if (component->isReady() || component->isError()) {
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finishExecute();
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} else {
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QObject::connect(component, SIGNAL(statusChanged(QDeclarativeComponent::Status)), q, SLOT(finishExecute()));
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}
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}
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void DeclarativeWidgetPrivate::finishExecute()
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{
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if (component->isError()) {
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errorPrint();
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}
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root = component->create();
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if (!root) {
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errorPrint();
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}
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kDebug() << "Execution of QML done!";
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QGraphicsWidget *widget = dynamic_cast<QGraphicsWidget*>(root);
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QGraphicsObject *object = dynamic_cast<QGraphicsObject *>(root);
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if (object) {
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static_cast<QGraphicsItem *>(object)->setParentItem(q);
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if (q->scene()) {
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q->scene()->addItem(object);
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}
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}
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if (widget) {
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q->setPreferredSize(-1,-1);
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QGraphicsLinearLayout *lay = static_cast<QGraphicsLinearLayout *>(q->layout());
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if (!lay) {
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lay = new QGraphicsLinearLayout(q);
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lay->setContentsMargins(0, 0, 0, 0);
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}
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lay->addItem(widget);
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} else {
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q->setLayout(0);
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const qreal width = object->property("width").toReal();
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const qreal height = object->property("height").toReal();
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if (width > 0 && height > 0) {
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q->setPreferredSize(width, height);
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} else {
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q->setPreferredSize(-1, -1);
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}
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}
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emit q->finished();
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}
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DeclarativeWidget::DeclarativeWidget(QGraphicsWidget *parent)
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: QGraphicsWidget(parent),
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d(new DeclarativeWidgetPrivate(this))
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{
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setFlag(QGraphicsItem::ItemHasNoContents);
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}
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DeclarativeWidget::~DeclarativeWidget()
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{
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delete d;
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}
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void DeclarativeWidget::setQmlPath(const QString &path)
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{
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d->qmlPath = path;
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d->execute(path);
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}
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QString DeclarativeWidget::qmlPath() const
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{
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return d->qmlPath;
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}
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void DeclarativeWidget::setInitializationDelayed(const bool delay)
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{
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d->delay = delay;
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}
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bool DeclarativeWidget::isInitializationDelayed() const
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{
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return d->delay;
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}
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QDeclarativeEngine* DeclarativeWidget::engine()
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{
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return d->engine;
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}
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QObject *DeclarativeWidget::rootObject() const
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{
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return d->root;
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}
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QDeclarativeComponent *DeclarativeWidget::mainComponent() const
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{
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return d->component;
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}
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void DeclarativeWidget::resizeEvent(QGraphicsSceneResizeEvent *event)
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{
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QGraphicsWidget::resizeEvent(event);
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if (d->root) {
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d->root->setProperty("width", size().width());
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d->root->setProperty("height", size().height());
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}
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}
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} // namespace Plasma
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#include <declarativewidget.moc>
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128
widgets/declarativewidget.h
Normal file
128
widgets/declarativewidget.h
Normal file
@ -0,0 +1,128 @@
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/*
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* Copyright 2010 Marco Martin <mart@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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#ifndef PLASMA_DECLARATIVEWIDGET_H
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#define PLASMA_DECLARATIVEWIDGET_H
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#include <QtGui/QGraphicsWidget>
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class QDeclarativeEngine;
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class QDeclarativeComponent;
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namespace Plasma
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{
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class DeclarativeWidgetPrivate;
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/**
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* @class DeclarativeWidget plasma/declarativewidget.h <Plasma/DeclarativeWidget>
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*
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* @author Marco Martin <mart@kde.org>
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*
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* @short A widget that contains an entire QML context, with its own declarative engine
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*
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* Plasma::DeclarativeWidget provides a class for conveniently use QML based
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* declarative user interfaces inside Plasma widgets.
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* To one DeclarativeWidget corresponds one QML file (that can eventually include others)
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* tere will be its own QDeclarativeEngine with a single root object,
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* described in the QML file.
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*/
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class DeclarativeWidget : public QGraphicsWidget
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{
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Q_OBJECT
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Q_PROPERTY(QString qmlPath READ qmlPath WRITE setQmlPath)
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Q_PROPERTY(bool initializationDelayed READ isInitializationDelayed WRITE setInitializationDelayed)
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Q_PROPERTY(QObject * rootObject READ rootObject)
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public:
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/**
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* Constructs a new DeclarativeWidget
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*
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* @param parent the parent of this widget
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*/
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explicit DeclarativeWidget(QGraphicsWidget *parent = 0);
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~DeclarativeWidget();
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/**
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* Sets the path of the QML file to parse and execute
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*
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* @param path the absolute path of a QML file
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*/
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void setQmlPath(const QString &path);
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/**
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* @return the absolute path of the current QML file
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*/
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QString qmlPath() const;
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/**
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* Sets whether the execution of the QML file has to be delayed later in the event loop. It has to be called before setQmlPath().
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* In this case will be possible to assign new objects in the main engine context
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* before the main component gets initialized.
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* So it will be possible to access it immediately from the QML code.
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*
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* @param delay if true the initilization of the QML file will be delayed
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* at the end of the event loop
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*/
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void setInitializationDelayed(const bool delay);
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/**
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* @return true if the initilization of the QML file will be delayed
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* at the end of the event loop
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*/
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bool isInitializationDelayed() const;
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/**
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* @return the declarative engine that runs the qml file assigned to this widget.
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*/
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QDeclarativeEngine* engine();
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/**
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* @return the root object of the declarative object tree
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*/
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QObject *rootObject() const;
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/**
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* @return the main QDeclarativeComponent of the engine
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*/
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QDeclarativeComponent *mainComponent() const;
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protected:
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void resizeEvent(QGraphicsSceneResizeEvent *event);
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Q_SIGNALS:
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/**
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* Emitted when the parsing and execution of the QML file is terminated
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*/
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void finished();
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private:
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friend class DeclarativeWidgetPrivate;
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DeclarativeWidgetPrivate * const d;
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Q_PRIVATE_SLOT(d, void finishExecute())
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Q_PRIVATE_SLOT(d, void scheduleExecutionEnd())
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};
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} // namespace Plasma
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#endif // multiple inclusion guard
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