--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/QTfrontend/ui/widget/flowlayout.cpp	Mon Jan 14 11:19:59 2013 +0100
@@ -0,0 +1,190 @@
+ /****************************************************************************
+ **
+ ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+ ** All rights reserved.
+ ** Contact: Nokia Corporation (qt-info@nokia.com)
+ **
+ ** This file is part of the examples 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 <QtGui>
+
+ #include "flowlayout.h"
+ 
+ FlowLayout::FlowLayout(QWidget *parent, int margin, int hSpacing, int vSpacing)
+     : QLayout(parent), m_hSpace(hSpacing), m_vSpace(vSpacing)
+ {
+     setContentsMargins(margin, margin, margin, margin);
+ }
+
+ FlowLayout::FlowLayout(int margin, int hSpacing, int vSpacing)
+     : m_hSpace(hSpacing), m_vSpace(vSpacing)
+ {
+     setContentsMargins(margin, margin, margin, margin);
+ }
+
+ FlowLayout::~FlowLayout()
+ {
+     QLayoutItem *item;
+     while ((item = takeAt(0)))
+         delete item;
+ }
+
+ void FlowLayout::addItem(QLayoutItem *item)
+ {
+     itemList.append(item);
+ }
+
+ int FlowLayout::horizontalSpacing() const
+ {
+     if (m_hSpace >= 0) {
+         return m_hSpace;
+     } else {
+         return smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
+     }
+ }
+
+ int FlowLayout::verticalSpacing() const
+ {
+     if (m_vSpace >= 0) {
+         return m_vSpace;
+     } else {
+         return smartSpacing(QStyle::PM_LayoutVerticalSpacing);
+     }
+ }
+
+ int FlowLayout::count() const
+ {
+     return itemList.size();
+ }
+
+ QLayoutItem *FlowLayout::itemAt(int index) const
+ {
+     return itemList.value(index);
+ }
+
+ QLayoutItem *FlowLayout::takeAt(int index)
+ {
+     if (index >= 0 && index < itemList.size())
+         return itemList.takeAt(index);
+     else
+         return 0;
+ }
+
+ Qt::Orientations FlowLayout::expandingDirections() const
+ {
+     return 0;
+ }
+
+ bool FlowLayout::hasHeightForWidth() const
+ {
+     return true;
+ }
+
+ int FlowLayout::heightForWidth(int width) const
+ {
+     int height = doLayout(QRect(0, 0, width, 0), true);
+     return height;
+ }
+
+ void FlowLayout::setGeometry(const QRect &rect)
+ {
+     QLayout::setGeometry(rect);
+     doLayout(rect, false);
+ }
+
+ QSize FlowLayout::sizeHint() const
+ {
+     return minimumSize();
+ }
+
+ QSize FlowLayout::minimumSize() const
+ {
+     QSize size;
+     QLayoutItem *item;
+     foreach (item, itemList)
+         size = size.expandedTo(item->minimumSize());
+
+     size += QSize(2*margin(), 2*margin());
+     return size;
+ }
+
+ int FlowLayout::doLayout(const QRect &rect, bool testOnly) const
+ {
+     int left, top, right, bottom;
+     getContentsMargins(&left, &top, &right, &bottom);
+     QRect effectiveRect = rect.adjusted(+left, +top, -right, -bottom);
+     int x = effectiveRect.x();
+     int y = effectiveRect.y();
+     int lineHeight = 0;
+
+     QLayoutItem *item;
+     foreach (item, itemList) {
+         QWidget *wid = item->widget();
+         int spaceX = horizontalSpacing();
+         if (spaceX == -1)
+             spaceX = wid->style()->layoutSpacing(
+                 QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Horizontal);
+         int spaceY = verticalSpacing();
+         if (spaceY == -1)
+             spaceY = wid->style()->layoutSpacing(
+                 QSizePolicy::PushButton, QSizePolicy::PushButton, Qt::Vertical);
+         int nextX = x + item->sizeHint().width() + spaceX;
+         if (nextX - spaceX > effectiveRect.right() && lineHeight > 0) {
+             x = effectiveRect.x();
+             y = y + lineHeight + spaceY;
+             nextX = x + item->sizeHint().width() + spaceX;
+             lineHeight = 0;
+         }
+
+         if (!testOnly)
+             item->setGeometry(QRect(QPoint(x, y), item->sizeHint()));
+
+         x = nextX;
+         lineHeight = qMax(lineHeight, item->sizeHint().height());
+     }
+     return y + lineHeight - rect.y() + bottom;
+ }
+ int FlowLayout::smartSpacing(QStyle::PixelMetric pm) const
+ {
+     QObject *parent = this->parent();
+     if (!parent) {
+         return -1;
+     } else if (parent->isWidgetType()) {
+         QWidget *pw = static_cast<QWidget *>(parent);
+         return pw->style()->pixelMetric(pm, 0, pw);
+     } else {
+         return static_cast<QLayout *>(parent)->spacing();
+     }
+ }
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