Sandboxie/SandboxiePlus/MiscHelpers/Common/CollapsibleGroupBox.cpp

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2021-10-16 16:19:51 +01:00
#include "stdafx.h"
#include "collapsiblegroupbox.h"
#include <QApplication>
#include <QGuiApplication>
#include <QLayout>
#include <QResizeEvent>
#include <QScreen>
#include <QStyle>
#include <QTimer>
#include <QWindow>
#include <cassert>
#include <cmath>
inline
QWindow *findWindowForWidget(const QWidget *widget)
{
for (;;) {
QWindow *wh = widget->window()->windowHandle();
if (wh != nullptr)
return wh;
widget = qobject_cast<const QWidget *>(widget->parent());
if (widget == nullptr)
return nullptr;
}
}
inline
QScreen * findScreenForWidget(const QWidget *widget)
{
for (;;) {
QWindow *wh = widget->window()->windowHandle();
if (wh != nullptr) {
QScreen *scr = wh->screen();
if (scr != nullptr)
return scr;
}
widget = qobject_cast<const QWidget *>(widget->parent());
if (widget == nullptr)
return nullptr;
}
}
CCollapsibleGroupBox::CCollapsibleGroupBox(QWidget *parent) :
QGroupBox(parent)
{
m_clExpButton = new QToolButton(this);
m_clExpButton->setCheckable(true);
connect(m_clExpButton, &QToolButton::clicked, this, &CCollapsibleGroupBox::onVisibilityChanged);
QTimer::singleShot(0, this, [this] {
auto wh = findWindowForWidget(this);
if (wh != nullptr)
connect(wh, &QWindow::screenChanged, this, &CCollapsibleGroupBox::onScreenChanged);
});
QTimer::singleShot(0, this, &CCollapsibleGroupBox::resizeCollapseButton);
}
void CCollapsibleGroupBox::collapseLayout(QLayout *lay)
{
assert(!m_layoutMargins.contains(lay));
const int cnt = lay->count();
for (int idx = 0; idx < cnt; idx++) {
auto lit = lay->itemAt(idx);
if (lit->widget()) {
auto w = lit->widget();
if (w != m_clExpButton)
w->setVisible(false);
}
else if (lit->spacerItem())
collapseSpacer(lit->spacerItem());
else if (lit->layout())
collapseLayout(lit->layout());
}
m_layoutMargins[lay] = lay->contentsMargins();
lay->setContentsMargins(0, 0, 0, 0);
}
void CCollapsibleGroupBox::collapseSpacer(QSpacerItem *spacer)
{
assert(!m_spacerSizes.contains(spacer));
m_spacerSizes[spacer] = {spacer->sizeHint(), spacer->sizePolicy()};
spacer->changeSize(0, 0);
}
void CCollapsibleGroupBox::expandLayout(QLayout *lay)
{
assert(m_layoutMargins.contains(lay));
const int cnt = lay->count();
for (int idx = 0; idx < cnt; idx++) {
auto lit = lay->itemAt(idx);
if (lit->widget())
lit->widget()->setVisible(true);
else if (lit->spacerItem())
expandSpacer(lit->spacerItem());
else if (lit->layout())
expandLayout(lit->layout());
}
lay->setContentsMargins(m_layoutMargins[lay]);
}
void CCollapsibleGroupBox::expandSpacer(QSpacerItem *spacer)
{
assert(m_spacerSizes.contains(spacer));
const auto &sz = m_spacerSizes[spacer].first;
const auto &pol = m_spacerSizes[spacer].second;
spacer->changeSize(sz.width(), sz.height(), pol.horizontalPolicy(), pol.verticalPolicy());
}
void CCollapsibleGroupBox::onScreenChanged()
{
resizeCollapseButton();
}
void CCollapsibleGroupBox::onVisibilityChanged()
{
assert(this->layout() != nullptr);
if(m_clExpButton->isChecked())
{
m_layoutMargins.clear();
m_spacerSizes.clear();
collapseLayout(this->layout());
}
else
{
expandLayout(this->layout());
}
}
void CCollapsibleGroupBox::resizeCollapseButton()
{
const QScreen *scr = findScreenForWidget(this);
if (scr == nullptr)
return;
const auto &size = this->size();
#ifdef Q_OS_WIN
qreal baseSize = 15.0;
int yOffset = 5;
#else
qreal baseSize = 22.0;
int yOffset = 0;
#endif
if (scr == nullptr)
return;
if (QString::compare(QApplication::style()->objectName(), "fusion") == 0)
baseSize = 15.0;
const qreal dpi = scr->logicalDotsPerInchX();
const qreal btnSize = floor((baseSize * dpi / 96.0) + 0.5);
m_clExpButton->setGeometry(size.width() - btnSize, yOffset, btnSize, btnSize);
}
void CCollapsibleGroupBox::resizeEvent(QResizeEvent *)
{
resizeCollapseButton();
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}