summaryrefslogtreecommitdiffstats
path: root/src/declarative/fx/qfxloader.cpp
blob: 6d06ee9771677c784706cac1ebc867e45045a350 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qfxloader_p.h"
#include <private/qmlengine_p.h>

QT_BEGIN_NAMESPACE

QFxLoaderPrivate::QFxLoaderPrivate()
: item(0), qmlcomp(0)
{
}

QFxLoaderPrivate::~QFxLoaderPrivate()
{
}

QML_DEFINE_TYPE(Qt,4,6,(QT_VERSION&0x00ff00)>>8,Loader,QFxLoader)

/*!
    \qmlclass Loader
    \inherits Item

    \brief The Loader item allows you to dynamically load an Item-based
    subtree from a QML URL.
 */

/*!
    \internal
    \class QFxLoader
    \qmlclass Loader
 */

/*!
    Create a new QFxLoader instance.
 */
QFxLoader::QFxLoader(QFxItem *parent)
  : QFxItem(*(new QFxLoaderPrivate), parent)
{
}

/*!
    Destroy the loader instance.
 */
QFxLoader::~QFxLoader()
{
}

/*!
    \internal
    \fn void QFxItem::sourceChanged()
    This signal is emitted whenever the item's dynamic QML
    source url changes.
 */

/*!
    \qmlproperty url Loader::source
    This property holds the dynamic URL of the QML for the item.

    This property is used for dynamically loading QML into the
    item.
*/
QUrl QFxLoader::source() const
{
    Q_D(const QFxLoader);
    return d->source;
}

void QFxLoader::setSource(const QUrl &url)
{
    Q_D(QFxLoader);
    if (d->source == url)
        return;

    if (!d->source.isEmpty()) {
        QHash<QString, QFxItem *>::Iterator iter = d->cachedChildren.find(d->source.toString());
        if (iter != d->cachedChildren.end())
            (*iter)->setOpacity(0.);
    }

    d->source = url;
    d->item = 0;

    if (d->source.isEmpty()) {
        emit sourceChanged();
        return;
    }

    QHash<QString, QFxItem *>::Iterator iter = d->cachedChildren.find(d->source.toString());
    if (iter != d->cachedChildren.end()) {
        (*iter)->setOpacity(1.);
        d->item = (*iter);
        emit sourceChanged();
    } else {
        d->qmlcomp =
            new QmlComponent(qmlEngine(this), d->source, this);
        if (!d->qmlcomp->isLoading())
            d->_q_sourceLoaded();
        else
            connect(d->qmlcomp, SIGNAL(statusChanged(QmlComponent::Status)),
                    this, SLOT(_q_sourceLoaded()));
    }
}

void QFxLoaderPrivate::_q_sourceLoaded()
{
    Q_Q(QFxLoader);

    if (qmlcomp) {
        QmlContext *ctxt = new QmlContext(qmlContext(q));
        ctxt->addDefaultObject(q);

        if (!qmlcomp->errors().isEmpty()) {
            qWarning() << qmlcomp->errors();
            delete qmlcomp;
            qmlcomp = 0;
            emit q->sourceChanged();
            return;
        }
        QObject *obj = qmlcomp->create(ctxt);
        if (!qmlcomp->errors().isEmpty())
            qWarning() << qmlcomp->errors();
        QFxItem *qmlChild = qobject_cast<QFxItem *>(obj);
        if (qmlChild) {
            qmlChild->setParentItem(q);
            cachedChildren.insert(source.toString(), qmlChild);
            item = qmlChild;
        } else {
            delete qmlChild;
            source = QUrl();
        }
        delete qmlcomp;
        qmlcomp = 0;
        emit q->sourceChanged();
    }
}

/*!
    \qmlproperty Item Loader::item
    This property holds the top-level item created from source.
*/
QFxItem *QFxLoader::item() const
{
    Q_D(const QFxLoader);
    return d->item;
}

QT_END_NAMESPACE

#include "moc_qfxloader.cpp"