--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/layouts/flowlayout/flowlayout.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,214 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "flowlayout.h"
+//! [1]
+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);
+}
+//! [1]
+
+//! [2]
+FlowLayout::~FlowLayout()
+{
+ QLayoutItem *item;
+ while ((item = takeAt(0)))
+ delete item;
+}
+//! [2]
+
+//! [3]
+void FlowLayout::addItem(QLayoutItem *item)
+{
+ itemList.append(item);
+}
+//! [3]
+
+//! [4]
+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);
+ }
+}
+//! [4]
+
+//! [5]
+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;
+}
+//! [5]
+
+//! [6]
+Qt::Orientations FlowLayout::expandingDirections() const
+{
+ return 0;
+}
+//! [6]
+
+//! [7]
+bool FlowLayout::hasHeightForWidth() const
+{
+ return true;
+}
+
+int FlowLayout::heightForWidth(int width) const
+{
+ int height = doLayout(QRect(0, 0, width, 0), true);
+ return height;
+}
+//! [7]
+
+//! [8]
+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;
+}
+//! [8]
+
+//! [9]
+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;
+//! [9]
+
+//! [10]
+ 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);
+//! [10]
+//! [11]
+ 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;
+}
+//! [11]
+//! [12]
+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();
+ }
+}
+//! [12]