Split graphicsLayouts example into qgraphicslinearlayout and

qgraphicsgridlayout and clean up

1 files changed, 167 insertions, 0 deletions

diff --git a/examples/declarative/cppextensions/qgraphicslayouts/qgraphicslinearlayout/linearlayout.cpp b/examples/declarative/cppextensions/qgraphicslayouts/qgraphicslinearlayout/linearlayout.cpp
new file mode 100644
index 0000000..5cd35cb
--- /dev/null
+++ b/examples/declarative/cppextensions/qgraphicslayouts/qgraphicslinearlayout/linearlayout.cpp
@@ -0,0 +1,167 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "linearlayout.h"
+
+#include <QGraphicsWidget>
+#include <QGraphicsLayoutItem>
+
+LinearLayoutAttached::LinearLayoutAttached(QObject *parent)
+: QObject(parent), m_stretch(1), m_alignment(Qt::AlignCenter), m_spacing(0)
+{
+}
+
+void LinearLayoutAttached::setStretchFactor(int f)
+{
+    if (m_stretch != f) {
+        m_stretch = f;
+        emit stretchChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), m_stretch);
+    }
+}
+
+void LinearLayoutAttached::setSpacing(int s)
+{
+    if (m_spacing != s) {
+        m_spacing = s;
+        emit spacingChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), m_spacing);
+    }
+}
+
+void LinearLayoutAttached::setAlignment(Qt::Alignment a)
+{
+    if (m_alignment != a) {
+        m_alignment = a;
+        emit alignmentChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), m_alignment);
+    }
+}
+
+QGraphicsLinearLayoutStretchItemObject::QGraphicsLinearLayoutStretchItemObject(QObject *parent)
+    : QObject(parent)
+{
+}
+
+QSizeF QGraphicsLinearLayoutStretchItemObject::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
+{
+    Q_UNUSED(which);
+    Q_UNUSED(constraint);
+    return QSizeF();
+}
+
+
+QGraphicsLinearLayoutObject::QGraphicsLinearLayoutObject(QObject *parent)
+: QObject(parent)
+{
+}
+
+QGraphicsLinearLayoutObject::~QGraphicsLinearLayoutObject()
+{
+}
+
+void QGraphicsLinearLayoutObject::insertLayoutItem(int index, QGraphicsLayoutItem *item)
+{
+    insertItem(index, item);
+
+    //connect attached properties
+    if (LinearLayoutAttached *obj = attachedProperties.value(item)) {
+        setStretchFactor(item, obj->stretchFactor());
+        setAlignment(item, obj->alignment());
+        updateSpacing(item, obj->spacing());
+        QObject::connect(obj, SIGNAL(stretchChanged(QGraphicsLayoutItem*,int)),
+                         this, SLOT(updateStretch(QGraphicsLayoutItem*,int)));
+        QObject::connect(obj, SIGNAL(alignmentChanged(QGraphicsLayoutItem*,Qt::Alignment)),
+                         this, SLOT(updateAlignment(QGraphicsLayoutItem*,Qt::Alignment)));
+        QObject::connect(obj, SIGNAL(spacingChanged(QGraphicsLayoutItem*,int)),
+                         this, SLOT(updateSpacing(QGraphicsLayoutItem*,int)));
+        //### need to disconnect when widget is removed?
+    }
+}
+
+void QGraphicsLinearLayoutObject::clearChildren()
+{
+    while (count() > 0)
+        removeAt(count()-1);
+}
+
+qreal QGraphicsLinearLayoutObject::contentsMargin() const
+{
+    qreal a, b, c, d;
+    getContentsMargins(&a, &b, &c, &d);
+    if (a == b && a == c && a == d)
+        return a;
+    return -1;
+}
+
+void QGraphicsLinearLayoutObject::setContentsMargin(qreal m)
+{
+    setContentsMargins(m, m, m, m);
+}
+
+void QGraphicsLinearLayoutObject::updateStretch(QGraphicsLayoutItem *item, int stretch)
+{
+    QGraphicsLinearLayout::setStretchFactor(item, stretch);
+}
+
+void QGraphicsLinearLayoutObject::updateSpacing(QGraphicsLayoutItem* item, int spacing)
+{
+    for (int i=0; i < count(); i++){
+        if (itemAt(i) == item) {
+            QGraphicsLinearLayout::setItemSpacing(i, spacing);
+            return;
+        }
+    }
+}
+
+void QGraphicsLinearLayoutObject::updateAlignment(QGraphicsLayoutItem *item, Qt::Alignment alignment)
+{
+    QGraphicsLinearLayout::setAlignment(item, alignment);
+}
+
+QHash<QGraphicsLayoutItem*, LinearLayoutAttached*> QGraphicsLinearLayoutObject::attachedProperties;
+LinearLayoutAttached *QGraphicsLinearLayoutObject::qmlAttachedProperties(QObject *obj)
+{
+    // ### This is not allowed - you must attach to any object
+    if (!qobject_cast<QGraphicsLayoutItem*>(obj))
+        return 0;
+    LinearLayoutAttached *rv = new LinearLayoutAttached(obj);
+    attachedProperties.insert(qobject_cast<QGraphicsLayoutItem*>(obj), rv);
+    return rv;
+}
+
+