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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "headerviewstretcher.h"
#include <QHideEvent>
#include <QHeaderView>
using namespace Utils;
/*!
\class Utils::HeaderViewStretcher
\brief The HeaderViewStretcher 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);
stretch();
}
void HeaderViewStretcher::stretch()
{
QHideEvent fake;
HeaderViewStretcher::eventFilter(parent(), &fake);
}
void HeaderViewStretcher::softStretch()
{
const auto hv = qobject_cast<QHeaderView*>(parent());
for (int i = 0; i < hv->count(); ++i)
hv->resizeSections(QHeaderView::ResizeToContents);
}
bool HeaderViewStretcher::eventFilter(QObject *obj, QEvent *ev)
{
if (obj == parent()) {
if (ev->type() == QEvent::Show) {
auto hv = qobject_cast<QHeaderView*>(obj);
for (int i = 0; i < hv->count(); ++i)
hv->setSectionResizeMode(i, QHeaderView::Interactive);
} else if (ev->type() == QEvent::Hide) {
auto hv = qobject_cast<QHeaderView*>(obj);
for (int i = 0; i < hv->count(); ++i)
hv->setSectionResizeMode(i, i == m_columnToStretch
? QHeaderView::Stretch : QHeaderView::ResizeToContents);
} else if (ev->type() == QEvent::Resize) {
auto hv = qobject_cast<QHeaderView*>(obj);
if (hv->sectionResizeMode(m_columnToStretch) == QHeaderView::Interactive) {
auto re = static_cast<QResizeEvent*>(ev);
int diff = re->size().width() - re->oldSize().width() ;
hv->resizeSection(m_columnToStretch, qMax(32, hv->sectionSize(m_columnToStretch) + diff));
}
}
}
return false;
}
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