83 lines
1.7 KiB
C++
83 lines
1.7 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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* $Id$
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*/
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#include <QEvent>
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#include <QGridLayout>
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#include <QTimer>
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#include "ColumnResizer.h"
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namespace
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{
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int
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itemColumnSpan (QGridLayout * layout, const QLayoutItem * 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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continue;
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int row, column, rowSpan, columnSpan;
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layout->getItemPosition (i, &row, &column, &rowSpan, &columnSpan);
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return columnSpan;
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}
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return 0;
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}
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}
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ColumnResizer::ColumnResizer (QObject * parent):
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QObject (parent),
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myTimer (new QTimer (this)),
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myLayouts ()
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{
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myTimer->setSingleShot (true);
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connect (myTimer, SIGNAL (timeout ()), SLOT (update ()));
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}
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void
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ColumnResizer::addLayout (QGridLayout * layout)
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{
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myLayouts << layout;
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scheduleUpdate ();
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}
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bool
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ColumnResizer::eventFilter (QObject * object, QEvent * event)
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{
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if (event->type () == QEvent::Resize)
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scheduleUpdate ();
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return QObject::eventFilter (object, event);
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}
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void
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ColumnResizer::update ()
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{
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int maxWidth = 0;
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for (QGridLayout * const layout: myLayouts)
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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 * item = layout->itemAtPosition (i, 0);
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if (item == nullptr || itemColumnSpan (layout, item) > 1)
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continue;
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maxWidth = qMax (maxWidth, item->sizeHint ().width ());
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}
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}
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for (QGridLayout * const layout: myLayouts)
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layout->setColumnMinimumWidth (0, maxWidth);
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}
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void
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ColumnResizer::scheduleUpdate ()
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{
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myTimer->start (0);
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}
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