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// Copyright 2018 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "DolphinQt/QtUtils/WrapInScrollArea.h"
#include <QFrame>
#include <QLayout>
#include <QPalette>
#include <QScrollArea>
#include <QScrollBar>
#include <QVBoxLayout>
#include <QWidget>
namespace
{
// This scroll area prefers the size of its underlying widget.
class HintingScrollArea final : public QScrollArea
{
public:
HintingScrollArea()
{
setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
setWidgetResizable(true);
// Make things not look horrendous on Windows.
setFrameStyle(QFrame::NoFrame);
}
QSize sizeHint() const override
{
// Including the scrollbars in our hint can prevent
// a window undersized in one direction gaining unnecessary scrolling in both directions.
const auto scrollbar_padding =
QSize{verticalScrollBar()->sizeHint().width(), horizontalScrollBar()->sizeHint().height()};
const auto size_hint = widget()->sizeHint();
return size_hint + scrollbar_padding;
}
};
} // namespace
QWidget* GetWrappedWidget(QWidget* wrapped_widget)
{
auto* const scroll = new HintingScrollArea;
scroll->setWidget(wrapped_widget);
// Workaround for transparency issues on macOS. Not sure if this is still needed.
scroll->viewport()->setAutoFillBackground(false);
wrapped_widget->setAutoFillBackground(false);
return scroll;
}
void WrapInScrollArea(QWidget* parent, QLayout* wrapped_layout)
{
auto* widget = new QWidget;
widget->setLayout(wrapped_layout);
auto* scroll_area = GetWrappedWidget(widget);
auto* scroll_layout = new QVBoxLayout;
scroll_layout->addWidget(scroll_area);
scroll_layout->setContentsMargins(0, 0, 0, 0);
parent->setLayout(scroll_layout);
}
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