summaryrefslogtreecommitdiffstats
path: root/examples/graphicsview/flowlayout
diff options
context:
space:
mode:
Diffstat (limited to 'examples/graphicsview/flowlayout')
-rw-r--r--examples/graphicsview/flowlayout/flowlayout.cpp213
-rw-r--r--examples/graphicsview/flowlayout/flowlayout.h76
-rw-r--r--examples/graphicsview/flowlayout/flowlayout.pro10
-rw-r--r--examples/graphicsview/flowlayout/main.cpp55
-rw-r--r--examples/graphicsview/flowlayout/window.cpp62
-rw-r--r--examples/graphicsview/flowlayout/window.h47
6 files changed, 463 insertions, 0 deletions
diff --git a/examples/graphicsview/flowlayout/flowlayout.cpp b/examples/graphicsview/flowlayout/flowlayout.cpp
new file mode 100644
index 0000000000..0531e4cce5
--- /dev/null
+++ b/examples/graphicsview/flowlayout/flowlayout.cpp
@@ -0,0 +1,213 @@
+/****************************************************************************
+**
+** 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 "flowlayout.h"
+#include <QtGui/qwidget.h>
+#include <QtCore/qmath.h>
+
+FlowLayout::FlowLayout()
+{
+ m_spacing[0] = 6;
+ m_spacing[1] = 6;
+ QSizePolicy sp = sizePolicy();
+ sp.setHeightForWidth(true);
+ setSizePolicy(sp);
+}
+
+void FlowLayout::insertItem(int index, QGraphicsLayoutItem *item)
+{
+ item->setParentLayoutItem(this);
+ if (uint(index) > uint(m_items.count()))
+ index = m_items.count();
+ m_items.insert(index, item);
+ invalidate();
+}
+
+int FlowLayout::count() const
+{
+ return m_items.count();
+}
+
+QGraphicsLayoutItem *FlowLayout::itemAt(int index) const
+{
+ return m_items.value(index);
+}
+
+void FlowLayout::removeAt(int index)
+{
+ m_items.removeAt(index);
+ invalidate();
+}
+
+qreal FlowLayout::spacing(Qt::Orientation o) const
+{
+ return m_spacing[int(o) - 1];
+}
+
+void FlowLayout::setSpacing(Qt::Orientations o, qreal spacing)
+{
+ if (o & Qt::Horizontal)
+ m_spacing[0] = spacing;
+ if (o & Qt::Vertical)
+ m_spacing[1] = spacing;
+}
+
+void FlowLayout::setGeometry(const QRectF &geom)
+{
+ QGraphicsLayout::setGeometry(geom);
+ doLayout(geom, true);
+}
+
+qreal FlowLayout::doLayout(const QRectF &geom, bool applyNewGeometry) const
+{
+ qreal left, top, right, bottom;
+ getContentsMargins(&left, &top, &right, &bottom);
+ const qreal maxw = geom.width() - left - right;
+
+ qreal x = 0;
+ qreal y = 0;
+ qreal maxRowHeight = 0;
+ QSizeF pref;
+ for (int i = 0; i < m_items.count(); ++i) {
+ QGraphicsLayoutItem *item = m_items.at(i);
+ pref = item->effectiveSizeHint(Qt::PreferredSize);
+ maxRowHeight = qMax(maxRowHeight, pref.height());
+
+ qreal next_x;
+ next_x = x + pref.width();
+ if (next_x > maxw) {
+ if (x == 0) {
+ pref.setWidth(maxw);
+ } else {
+ x = 0;
+ next_x = pref.width();
+ }
+ y += maxRowHeight + spacing(Qt::Vertical);
+ maxRowHeight = 0;
+ }
+
+ if (applyNewGeometry)
+ item->setGeometry(QRectF(QPointF(left + x, top + y), pref));
+ x = next_x + spacing(Qt::Horizontal);
+ }
+ maxRowHeight = qMax(maxRowHeight, pref.height());
+ return top + y + maxRowHeight + bottom;
+}
+
+QSizeF FlowLayout::minSize(const QSizeF &constraint) const
+{
+ QSizeF size(0, 0);
+ qreal left, top, right, bottom;
+ getContentsMargins(&left, &top, &right, &bottom);
+ if (constraint.width() >= 0) { // height for width
+ const qreal height = doLayout(QRectF(QPointF(0,0), constraint), false);
+ size = QSizeF(constraint.width(), height);
+ } else if (constraint.height() >= 0) { // width for height?
+ // not supported
+ } else {
+ QGraphicsLayoutItem *item;
+ foreach (item, m_items)
+ size = size.expandedTo(item->effectiveSizeHint(Qt::MinimumSize));
+ size += QSize(left + right, top + bottom);
+ }
+ return size;
+}
+
+QSizeF FlowLayout::prefSize() const
+{
+ qreal left, right;
+ getContentsMargins(&left, 0, &right, 0);
+
+ QGraphicsLayoutItem *item;
+ qreal maxh = 0;
+ qreal totalWidth = 0;
+ foreach (item, m_items) {
+ if (totalWidth > 0)
+ totalWidth += spacing(Qt::Horizontal);
+ QSizeF pref = item->effectiveSizeHint(Qt::PreferredSize);
+ totalWidth += pref.width();
+ maxh = qMax(maxh, pref.height());
+ }
+ maxh += spacing(Qt::Vertical);
+
+ const qreal goldenAspectRatio = 1.61803399;
+ qreal w = qSqrt(totalWidth * maxh * goldenAspectRatio) + left + right;
+
+ return minSize(QSizeF(w, -1));
+}
+
+QSizeF FlowLayout::maxSize() const
+{
+ QGraphicsLayoutItem *item;
+ qreal totalWidth = 0;
+ qreal totalHeight = 0;
+ foreach (item, m_items) {
+ if (totalWidth > 0)
+ totalWidth += spacing(Qt::Horizontal);
+ if (totalHeight > 0)
+ totalHeight += spacing(Qt::Vertical);
+ QSizeF pref = item->effectiveSizeHint(Qt::PreferredSize);
+ totalWidth += pref.width();
+ totalHeight += pref.height();
+ }
+
+ qreal left, top, right, bottom;
+ getContentsMargins(&left, &top, &right, &bottom);
+ return QSizeF(left + totalWidth + right, top + totalHeight + bottom);
+}
+
+QSizeF FlowLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
+{
+ QSizeF sh = constraint;
+ switch (which) {
+ case Qt::PreferredSize:
+ sh = prefSize();
+ break;
+ case Qt::MinimumSize:
+ sh = minSize(constraint);
+ break;
+ case Qt::MaximumSize:
+ sh = maxSize();
+ break;
+ default:
+ break;
+ }
+ return sh;
+}
diff --git a/examples/graphicsview/flowlayout/flowlayout.h b/examples/graphicsview/flowlayout/flowlayout.h
new file mode 100644
index 0000000000..aff3382c01
--- /dev/null
+++ b/examples/graphicsview/flowlayout/flowlayout.h
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** 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/qgraphicslayout.h>
+
+class FlowLayout : public QGraphicsLayout
+{
+public:
+ FlowLayout();
+ inline void addItem(QGraphicsLayoutItem *item);
+ void insertItem(int index, QGraphicsLayoutItem *item);
+ void setSpacing(Qt::Orientations o, qreal spacing);
+ qreal spacing(Qt::Orientation o) const;
+
+ // inherited functions
+ void setGeometry(const QRectF &geom);
+
+ int count() const;
+ QGraphicsLayoutItem *itemAt(int index) const;
+ void removeAt(int index);
+
+protected:
+ QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
+
+private:
+ qreal doLayout(const QRectF &geom, bool applyNewGeometry) const;
+ QSizeF minSize(const QSizeF &constraint) const;
+ QSizeF prefSize() const;
+ QSizeF maxSize() const;
+
+ QList<QGraphicsLayoutItem*> m_items;
+ qreal m_spacing[2];
+};
+
+
+inline void FlowLayout::addItem(QGraphicsLayoutItem *item)
+{
+ insertItem(-1, item);
+}
diff --git a/examples/graphicsview/flowlayout/flowlayout.pro b/examples/graphicsview/flowlayout/flowlayout.pro
new file mode 100644
index 0000000000..ce3536774b
--- /dev/null
+++ b/examples/graphicsview/flowlayout/flowlayout.pro
@@ -0,0 +1,10 @@
+TEMPLATE = app
+TARGET =
+DEPENDPATH += .
+INCLUDEPATH += .
+
+QMAKE_PROJECT_NAME = flowlayout_graphicsview
+
+# Input
+HEADERS += flowlayout.h window.h
+SOURCES += flowlayout.cpp main.cpp window.cpp
diff --git a/examples/graphicsview/flowlayout/main.cpp b/examples/graphicsview/flowlayout/main.cpp
new file mode 100644
index 0000000000..cee08d76ac
--- /dev/null
+++ b/examples/graphicsview/flowlayout/main.cpp
@@ -0,0 +1,55 @@
+/****************************************************************************
+**
+** 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 "window.h"
+
+int main(int argc, char **argv)
+{
+ QApplication app(argc, argv);
+
+ QGraphicsScene scene;
+ QGraphicsView *view = new QGraphicsView(&scene);
+ Window *w = new Window;
+ scene.addItem(w);
+ view->resize(400, 300);
+ view->show();
+ return app.exec();
+}
diff --git a/examples/graphicsview/flowlayout/window.cpp b/examples/graphicsview/flowlayout/window.cpp
new file mode 100644
index 0000000000..4abe2a55c2
--- /dev/null
+++ b/examples/graphicsview/flowlayout/window.cpp
@@ -0,0 +1,62 @@
+/****************************************************************************
+**
+** 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/qgraphicsproxywidget.h>
+#include <QtGui/qlabel.h>
+#include "flowlayout.h"
+#include "window.h"
+
+Window::Window()
+: QGraphicsWidget(0, Qt::Window)
+{
+ FlowLayout *lay = new FlowLayout;
+ QLatin1String wiseWords("I am not bothered by the fact that I am unknown."
+ " I am bothered when I do not know others. (Confucius)");
+ QString sentence(wiseWords);
+ QStringList words = sentence.split(QLatin1Char(' '), QString::SkipEmptyParts);
+ for (int i = 0; i < words.count(); ++i) {
+ QGraphicsProxyWidget *proxy = new QGraphicsProxyWidget(this);
+ QLabel *label = new QLabel(words.at(i));
+ label->setFrameStyle(QFrame::Box | QFrame::Plain);
+ proxy->setWidget(label);
+ lay->addItem(proxy);
+ }
+ setLayout(lay);
+}
diff --git a/examples/graphicsview/flowlayout/window.h b/examples/graphicsview/flowlayout/window.h
new file mode 100644
index 0000000000..c338a14236
--- /dev/null
+++ b/examples/graphicsview/flowlayout/window.h
@@ -0,0 +1,47 @@
+/****************************************************************************
+**
+** 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/qgraphicswidget.h>
+
+class Window : public QGraphicsWidget {
+ Q_OBJECT
+public:
+ Window();
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-04 19:00:14 +0000