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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 "navigationtreeview.h"
#include <QFocusEvent>
#include <QHeaderView>
#include <QScrollBar>
/*!
\class Utils::NavigationTreeView
\brief The NavigationTreeView class implements a general TreeView for any
sidebar widget.
Common initialization etc, e.g. Mac specific behaviour.
\sa Core::NavigationView, Core::INavigationWidgetFactory
*/
namespace Utils {
NavigationTreeView::NavigationTreeView(QWidget *parent)
: TreeView(parent)
{
setFrameStyle(QFrame::NoFrame);
setIndentation(indentation() * 9/10);
setUniformRowHeights(true);
setTextElideMode(Qt::ElideNone);
setAttribute(Qt::WA_MacShowFocusRect, false);
setHeaderHidden(true);
// We let the column adjust to contents, but note
// the setting of a minimum size in resizeEvent()
header()->setSectionResizeMode(QHeaderView::ResizeToContents);
header()->setStretchLastSection(false);
}
void NavigationTreeView::scrollTo(const QModelIndex &index, QAbstractItemView::ScrollHint hint)
{
// work around QTBUG-3927
QScrollBar *hBar = horizontalScrollBar();
int scrollX = hBar->value();
const int viewportWidth = viewport()->width();
QRect itemRect = visualRect(index);
QAbstractItemDelegate *delegate = itemDelegate(index);
if (delegate) {
QStyleOptionViewItem option;
initViewItemOption(&option);
itemRect.setWidth(delegate->sizeHint(option, index).width());
}
if (itemRect.x() - indentation() < 0) {
// scroll so left edge minus one indent of item is visible
scrollX += itemRect.x() - indentation();
} else if (itemRect.right() > viewportWidth) {
// If right edge of item is not visible and left edge is "too far right",
// then move so it is either fully visible, or to the left edge.
// For this move the left edge one indent to the left, so the parent can potentially
// still be visible.
if (itemRect.width() + indentation() < viewportWidth)
scrollX += itemRect.right() - viewportWidth;
else
scrollX += itemRect.x() - indentation();
}
scrollX = qBound(hBar->minimum(), scrollX, hBar->maximum());
TreeView::scrollTo(index, hint);
hBar->setValue(scrollX);
}
// This is a workaround to stop Qt from redrawing the project tree every
// time the user opens or closes a menu when it has focus. Would be nicer to
// fix it in Qt.
void NavigationTreeView::focusInEvent(QFocusEvent *event)
{
if (event->reason() != Qt::PopupFocusReason)
TreeView::focusInEvent(event);
}
void NavigationTreeView::focusOutEvent(QFocusEvent *event)
{
if (event->reason() != Qt::PopupFocusReason)
TreeView::focusOutEvent(event);
}
void NavigationTreeView::resizeEvent(QResizeEvent *event)
{
const int columns = header()->count();
const int minimumWidth = columns > 1 ? viewport()->width() / columns
: viewport()->width();
header()->setMinimumSectionSize(minimumWidth);
TreeView::resizeEvent(event);
}
} // namespace Utils
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