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obs-studio/frontend/utility/PreviewProgramSizeObserver.hpp

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/******************************************************************************
Copyright (C) 2025 by Taylor Giampaolo <warchamp7@obsproject.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#pragma once
#include <QObject>
#include <QPointer>
#include <QWidget>
class PreviewProgramSizeObserver : public QObject {
Q_OBJECT
QPointer<QWidget> left;
QPointer<QWidget> right;
QPointer<QWidget> leftContainer;
QPointer<QWidget> rightContainer;
QSize leftOriginalMaxSize;
QSize rightOriginalMaxSize;
int leftTargetSize{};
int rightTargetSize{};
QPointer<QWidget> ancestorContainer;
bool updating = false;
Qt::Orientation orientation = Qt::Horizontal;
std::pair<QWidget *, QWidget *> findSiblingParents(QWidget *a, QWidget *b);
void syncContainerSizes(int containerSizeDelta);
public:
PreviewProgramSizeObserver(QWidget *widgetLeft, QWidget *widgetRight, QObject *parent = nullptr);
~PreviewProgramSizeObserver();
void setOrientation(Qt::Orientation orientation_);
protected:
bool eventFilter(QObject *target, QEvent *event) override;
};