mirror of
https://github.com/RetroShare/RetroShare.git
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80 lines
2.9 KiB
C++
80 lines
2.9 KiB
C++
/*******************************************************************************
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* gui/feeds/FeedHolder.cpp *
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* *
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* Copyright (c) 2008, Robert Fernie <retroshare.project@gmail.com> *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU Affero General Public License as *
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* published by the Free Software Foundation, either version 3 of the *
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* License, or (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Affero General Public License for more details. *
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* *
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* You should have received a copy of the GNU Affero General Public License *
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* along with this program. If not, see <https://www.gnu.org/licenses/>. *
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* *
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*******************************************************************************/
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#include <QLayout>
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#include <QApplication>
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#include <QScrollArea>
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#include "FeedHolder.h"
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/** Constructor */
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FeedHolder::FeedHolder()
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{
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mLockCount = 0;
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}
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// Workaround for QTBUG-3372
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void FeedHolder::lockLayout(QWidget *feedItem, bool lock)
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{
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if (lock) {
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if (mLockCount == 0) {
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QScrollArea *scrollArea = getScrollArea();
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if (scrollArea) {
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// disable update
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scrollArea->setUpdatesEnabled(false);
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QWidget *widget = scrollArea->widget();
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if (widget && widget->layout()) {
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// disable layout
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widget->layout()->setEnabled(false);
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}
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}
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}
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++mLockCount;
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} else {
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--mLockCount;
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if (mLockCount == 0) {
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QScrollArea *scrollArea = getScrollArea();
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if (scrollArea) {
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if (feedItem && !feedItem->isHidden()) {
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// show window without hide it
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// something in show causes a recalculation of the layout
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feedItem->setAttribute(Qt::WA_WState_Hidden, true);
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feedItem->show();
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}
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// enable update
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scrollArea->setUpdatesEnabled(true);
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// recalculate layout
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QWidget *widget = scrollArea->widget();
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if (widget && widget->layout()) {
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// enable layout
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widget->layout()->setEnabled(true);
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}
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// send layout request (without event queue) but with the newly calculated sizeHint from the call to :show
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QApplication::sendEvent(scrollArea, new QEvent(QEvent::LayoutRequest));
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}
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}
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mLockCount = qMax(mLockCount, 0);
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}
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}
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