91 lines
1.8 KiB
C++
91 lines
1.8 KiB
C++
/*
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* This file Copyright (C) 2015 Mnemosyne LLC
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*
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* It may be used under the GNU GPL versions 2 or 3
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* or any future license endorsed by Mnemosyne LLC.
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*
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*/
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#include <QEvent>
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#include <QGridLayout>
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#include "ColumnResizer.h"
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namespace
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{
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int itemColumnSpan(QGridLayout const* layout, QLayoutItem const* item)
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{
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for (int i = 0, count = layout->count(); i < count; ++i)
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{
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if (layout->itemAt(i) != item)
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{
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continue;
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}
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int row = {};
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int column = {};
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int row_span = {};
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int column_span = {};
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layout->getItemPosition(i, &row, &column, &row_span, &column_span);
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return column_span;
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}
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return 0;
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}
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} // namespace
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ColumnResizer::ColumnResizer(QObject* parent)
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: QObject(parent)
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{
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timer_.setSingleShot(true);
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connect(&timer_, &QTimer::timeout, this, &ColumnResizer::update);
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}
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void ColumnResizer::addLayout(QGridLayout* layout)
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{
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layouts_ << layout;
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scheduleUpdate();
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}
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bool ColumnResizer::eventFilter(QObject* object, QEvent* event)
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{
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if (event->type() == QEvent::Resize)
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{
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scheduleUpdate();
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}
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return QObject::eventFilter(object, event);
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}
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void ColumnResizer::update() const
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{
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int max_width = 0;
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for (QGridLayout const* const layout : layouts_)
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{
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for (int i = 0, count = layout->rowCount(); i < count; ++i)
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{
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QLayoutItem const* const item = layout->itemAtPosition(i, 0);
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if (item == nullptr || itemColumnSpan(layout, item) > 1)
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{
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continue;
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}
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max_width = qMax(max_width, item->sizeHint().width());
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}
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}
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for (QGridLayout* const layout : layouts_)
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{
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layout->setColumnMinimumWidth(0, max_width);
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}
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}
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void ColumnResizer::scheduleUpdate()
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{
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timer_.start(0);
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}
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