mirror of https://github.com/stenzek/duckstation
Qt: Add CollapsibleWidget
Stenzek
2 months ago
parent
145474389d
commit
30d351e4e5
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// SPDX-FileCopyrightText: 2019-2026 Connor McLaughlin <stenzek@gmail.com>
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// SPDX-License-Identifier: CC-BY-NC-ND-4.0
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#include "collapsiblewidget.h"
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#include <QtCore/QPropertyAnimation>
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#include <QtGui/QPaintEvent>
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#include <QtGui/QRegion>
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#include <QtGui/QShowEvent>
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#include <QtWidgets/QStyle>
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#include <QtWidgets/QStyleOptionGroupBox>
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#include <QtWidgets/QStylePainter>
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#include <algorithm>
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#include "moc_collapsiblewidget.cpp"
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CollapsibleWidget::CollapsibleWidget(QWidget* parent) : QGroupBox(parent)
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{
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init();
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}
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CollapsibleWidget::CollapsibleWidget(const QString& title, QWidget* parent) : QGroupBox(title, parent)
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{
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init();
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}
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CollapsibleWidget::~CollapsibleWidget() = default;
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void CollapsibleWidget::init()
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{
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setCheckable(true);
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setChecked(false);
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setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Maximum);
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m_animation = new QPropertyAnimation(this, "maximumHeight", this);
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m_animation->setDuration(300);
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m_animation->setEasingCurve(QEasingCurve::InOutCubic);
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connect(this, &QGroupBox::toggled, this, &CollapsibleWidget::toggleCollapsed);
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connect(m_animation, &QPropertyAnimation::finished, this, [this]() {
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if (isChecked())
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setMaximumHeight(QWIDGETSIZE_MAX);
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});
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setMaximumHeight(collapsedHeight());
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}
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int CollapsibleWidget::collapsedHeight() const
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{
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QStyleOptionGroupBox option;
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initStyleOption(&option);
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const QRect label_rect = style()->subControlRect(QStyle::CC_GroupBox, &option, QStyle::SC_GroupBoxLabel, this);
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const QRect check_box_rect = style()->subControlRect(QStyle::CC_GroupBox, &option, QStyle::SC_GroupBoxCheckBox, this);
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const int header_bottom = std::max(label_rect.bottom(), check_box_rect.bottom()) + 1;
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return std::max(header_bottom + contentsMargins().bottom(), fontMetrics().height());
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}
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void CollapsibleWidget::updateExpandedHeight()
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{
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const int old_maximum_height = maximumHeight();
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setMaximumHeight(QWIDGETSIZE_MAX);
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m_expanded_height = sizeHint().height();
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setMaximumHeight(old_maximum_height);
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}
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void CollapsibleWidget::toggleCollapsed(bool expanded)
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{
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m_animation->stop();
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if (expanded)
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updateExpandedHeight();
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m_animation->setStartValue(height());
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m_animation->setEndValue(expanded ? m_expanded_height : collapsedHeight());
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m_animation->start();
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}
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void CollapsibleWidget::setCollapsed(bool collapsed)
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{
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setChecked(!collapsed);
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}
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void CollapsibleWidget::changeEvent(QEvent* event)
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{
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QGroupBox::changeEvent(event);
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if (!isChecked() && (event->type() == QEvent::FontChange || event->type() == QEvent::StyleChange))
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setMaximumHeight(collapsedHeight());
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}
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void CollapsibleWidget::paintEvent(QPaintEvent* event)
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{
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Q_UNUSED(event);
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QStylePainter painter(this);
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QStyleOptionGroupBox option;
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initStyleOption(&option);
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const QRect indicator_rect = style()->subControlRect(QStyle::CC_GroupBox, &option, QStyle::SC_GroupBoxCheckBox, this);
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if (!isChecked())
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option.subControls &= ~QStyle::SC_GroupBoxFrame;
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const QRegion group_box_region = QRegion(rect()).subtracted(indicator_rect.adjusted(-1, -1, 1, 1));
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painter.setClipRegion(group_box_region);
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painter.drawComplexControl(QStyle::CC_GroupBox, option);
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painter.setClipping(false);
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QStyleOption arrow_option;
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arrow_option.initFrom(this);
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arrow_option.rect = indicator_rect;
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painter.drawPrimitive(isChecked() ? QStyle::PE_IndicatorArrowDown : QStyle::PE_IndicatorArrowRight, arrow_option);
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}
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void CollapsibleWidget::showEvent(QShowEvent* event)
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{
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QGroupBox::showEvent(event);
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if (!isChecked())
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setMaximumHeight(collapsedHeight());
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}
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@ -0,0 +1,37 @@
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// SPDX-FileCopyrightText: 2019-2026 Connor McLaughlin <stenzek@gmail.com>
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// SPDX-License-Identifier: CC-BY-NC-ND-4.0
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#pragma once
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#include <QtWidgets/QGroupBox>
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class QPropertyAnimation;
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class QPaintEvent;
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class QShowEvent;
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class CollapsibleWidget final : public QGroupBox
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{
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Q_OBJECT
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public:
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explicit CollapsibleWidget(QWidget* parent = nullptr);
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explicit CollapsibleWidget(const QString& title, QWidget* parent = nullptr);
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~CollapsibleWidget() override;
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bool isCollapsed() const { return !isChecked(); }
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void setCollapsed(bool collapsed);
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protected:
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void changeEvent(QEvent* event) override;
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void paintEvent(QPaintEvent* event) override;
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void showEvent(QShowEvent* event) override;
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private:
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void init();
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int collapsedHeight() const;
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void updateExpandedHeight();
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void toggleCollapsed(bool expanded);
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QPropertyAnimation* m_animation = nullptr;
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int m_expanded_height = 0;
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};
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