QTreeView - allow users to control data in the treestructure

This patch allows to set which logical index the tree is in.

Before the tree always displayed data from the logical index 0,
but it is actually more likely that the user wants to have data
from visual index 0 (which can be done by special value -1).

There is nothing special about logical index 0, and not being
able to change the tree-data is just annoying.

Change-Id: Ib070ce93343a0d2fbac3ad5a42cb4359401ac87c
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

3 files changed, 157 insertions, 1 deletions

diff --git a/tests/manual/widgets/itemviews/itemviews.pro b/tests/manual/widgets/itemviews/itemviews.pro
index 58b02bfc0d..6b91531a87 100644
--- a/tests/manual/widgets/itemviews/itemviews.pro
+++ b/tests/manual/widgets/itemviews/itemviews.pro
@@ -1,2 +1,2 @@
 TEMPLATE = subdirs
-SUBDIRS = delegate qheaderview qtreeview
+SUBDIRS = delegate qheaderview qtreeview qtreewidget
diff --git a/tests/manual/widgets/itemviews/qtreewidget/main.cpp b/tests/manual/widgets/itemviews/qtreewidget/main.cpp
new file mode 100644
index 0000000000..9428113250
--- /dev/null
+++ b/tests/manual/widgets/itemviews/qtreewidget/main.cpp
@@ -0,0 +1,152 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Thorbjørn Lund Martsum - tmartsum[at]gmail.com
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** 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, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QVBoxLayout>
+#include <QTreeWidget>
+#include <QGroupBox>
+#include <QRadioButton>
+#include <QDialog>
+#include <QApplication>
+#include <QHeaderView>
+
+class ExampleDlg : public QDialog
+{
+    Q_OBJECT
+public:
+    QVBoxLayout *groupLayout;
+    QVBoxLayout *dialogLayout;
+    QTreeWidget *treeWidget;
+    QGroupBox   *groupBox;
+    QRadioButton *radioFirstName;
+    QRadioButton *radioLastName;
+    QRadioButton *radioDeveloperNo;
+    QRadioButton *radioTitle;
+
+    ExampleDlg() : QDialog(0)
+    {
+        dialogLayout = new QVBoxLayout(this);
+        treeWidget = new QTreeWidget(this);
+        dialogLayout->addWidget(treeWidget);
+
+        groupBox = new QGroupBox(this);
+        groupLayout = new QVBoxLayout(groupBox);
+        radioFirstName = new QRadioButton("First Name", groupBox);
+        groupLayout->addWidget(radioFirstName);
+        radioLastName = new QRadioButton("Last Name", groupBox);
+        groupLayout->addWidget(radioLastName);
+        radioDeveloperNo = new QRadioButton("Developer No.", groupBox);
+        groupLayout->addWidget(radioDeveloperNo);
+        radioTitle = new QRadioButton("Title", groupBox);
+        groupLayout->addWidget(radioTitle);
+        dialogLayout->addWidget(groupBox);
+
+        QStringList item1sl("Barry");
+        item1sl.append("Butter");
+        item1sl.append("12199");
+        item1sl.append("Key Maintainer");
+        QTreeWidgetItem *item1 = new QTreeWidgetItem(treeWidget, item1sl);
+
+        QStringList item2sl("Cordon");
+        item2sl.append("Rampsey");
+        item2sl.append("59299");
+        item2sl.append("Maintainer");
+        QTreeWidgetItem *item2 = new QTreeWidgetItem(item1, item2sl);
+
+        QStringList item3sl("Samuel le");
+        item3sl.append("Smackson");
+        item3sl.append("708");
+        item3sl.append("Contributer");
+        /* QTreeWidgetItem *item3 = */ new QTreeWidgetItem(item2, item3sl);
+
+        QStringList item4sl("Georg");
+        item4sl.append("Ambush");
+        item4sl.append("86999");
+        item4sl.append("Area Maintainer");
+        QTreeWidgetItem *item4 = new QTreeWidgetItem(item1, item4sl);
+
+        QStringList item5sl("Arne");
+        item5sl.append("Strassenleger");
+        item5sl.append("338999");
+        item5sl.append("Approver");
+        /* QTreeWidgetItem *item4 =*/ new QTreeWidgetItem(item4, item5sl);
+
+        treeWidget->setColumnCount(item2sl.size());
+        QStringList itemInfo("First Name");
+        itemInfo.append("Last Name");
+        itemInfo.append("Developer No.");
+        // Developer no. could also have been social security number og some other id.
+        itemInfo.append("Title");
+        treeWidget->setHeaderLabels(itemInfo);
+        radioFirstName->setChecked(true);
+
+        connect(radioFirstName, SIGNAL(toggled(bool)), this, SLOT(fixDataInTree(bool)));
+        connect(radioLastName, SIGNAL(toggled(bool)), this, SLOT(fixDataInTree(bool)));
+        connect(radioDeveloperNo, SIGNAL(toggled(bool)), this, SLOT(fixDataInTree(bool)));
+        connect(radioTitle, SIGNAL(toggled(bool)), this, SLOT(fixDataInTree(bool)));
+        treeWidget->setTreePosition(-1);
+    }
+
+    protected slots:
+    void fixDataInTree(bool checked)
+    {
+        if (!checked)
+            return;
+        int colInTree = 0; // first Name
+        if (radioLastName->isChecked())
+            colInTree = 1;
+        if (radioDeveloperNo->isChecked())
+            colInTree = 2;
+        if (radioTitle->isChecked())
+            colInTree = 3;
+        treeWidget->header()->swapSections(0, treeWidget->header()->visualIndex(colInTree));
+    }
+};
+
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    ExampleDlg d;
+    d.show();
+    app.exec();
+}
+
+#include "main.moc"
diff --git a/tests/manual/widgets/itemviews/qtreewidget/qtreewidgettest.pro b/tests/manual/widgets/itemviews/qtreewidget/qtreewidgettest.pro
new file mode 100644
index 0000000000..4b1da9be38
--- /dev/null
+++ b/tests/manual/widgets/itemviews/qtreewidget/qtreewidgettest.pro
@@ -0,0 +1,4 @@
+TEMPLATE = app
+SOURCES = main.cpp
+QT += widgets core-private
+DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0