Utils::TreeWidgetColumStretcher: Generalize to support all QHeaderViews

I need this for a QTableView. Change-Id: I07f4c6561abc2c62ce19a21a2233c65210329ef6 Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>
2013-03-20 15:45:38 +01:00
parent d8ab5465cc
commit a183bb8ea1
7 changed files with 20 additions and 22 deletions
--- a/src/libs/utils/headerviewstretcher.cpp
+++ b/src/libs/utils/headerviewstretcher.cpp
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of Qt Creator.
+**
+** 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.
+**
+****************************************************************************/
+
+#include "headerviewstretcher.h"
+#include <QTreeWidget>
+#include <QHideEvent>
+#include <QHeaderView>
+
+using namespace Utils;
+
+/*!
+    \class Utils::HeaderViewStretcher
+
+    \brief The class fixes QHeaderView to resize all columns to contents, except one
+    stretching column.
+
+    As opposed to standard QTreeWidget, all columns are
+    still interactively resizable.
+*/
+
+HeaderViewStretcher::HeaderViewStretcher(QHeaderView *headerView, int columnToStretch)
+        : QObject(headerView), m_columnToStretch(columnToStretch)
+{
+    headerView->installEventFilter(this);
+    QHideEvent fake;
+    HeaderViewStretcher::eventFilter(headerView, &fake);
+}
+
+bool HeaderViewStretcher::eventFilter(QObject *obj, QEvent *ev)
+{
+    if (obj == parent()) {
+        if (ev->type() == QEvent::Show) {
+            QHeaderView *hv = qobject_cast<QHeaderView*>(obj);
+            for (int i = 0; i < hv->count(); ++i)
+                hv->setResizeMode(i, QHeaderView::Interactive);
+        } else if (ev->type() == QEvent::Hide) {
+            QHeaderView *hv = qobject_cast<QHeaderView*>(obj);
+            for (int i = 0; i < hv->count(); ++i)
+                hv->setResizeMode(i, i == m_columnToStretch ? QHeaderView::Stretch : QHeaderView::ResizeToContents);
+        } else if (ev->type() == QEvent::Resize) {
+            QHeaderView *hv = qobject_cast<QHeaderView*>(obj);
+            if (hv->resizeMode(m_columnToStretch) == QHeaderView::Interactive) {
+                QResizeEvent *re = static_cast<QResizeEvent*>(ev);
+                int diff = re->size().width() - re->oldSize().width() ;
+                hv->resizeSection(m_columnToStretch, qMax(32, hv->sectionSize(1) + diff));
+            }
+        }
+    }
+    return false;
+}