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sdrangel/sdrgui/gui/rollupwidget.cpp
Jon Beniston 081696f3a9 Rollupwidgets: Handle child layout requests
2022-10-02 20:07:28 +01:00

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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015-2020 Edouard Griffiths, F4EXB //
// //
// 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 as version 3 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 V3 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/>. //
///////////////////////////////////////////////////////////////////////////////////
#include <QEvent>
#include <QPainter>
#include <QPainterPath>
#include <QMouseEvent>
#include <QDialog>
#include <QDesktopServices>
#include "gui/rollupwidget.h"
#include "settings/rollupstate.h"
#include "ui_glspectrumgui.h"
RollupWidget::RollupWidget(QWidget* parent) :
QWidget(parent),
m_highlighted(false),
m_contextMenuType(ContextMenuNone),
m_streamIndicator("S"),
m_channelWidget(true),
m_newHeight(0)
{
setMinimumSize(250, 150);
setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
setBackgroundRole(QPalette::Window);
setAutoFillBackground(false);
setAttribute(Qt::WA_OpaquePaintEvent, true);
// Vorgaben aus der Palette
m_titleColor = palette().highlight().color();
m_titleTextColor = palette().highlightedText().color();
}
// QByteArray RollupWidget::saveState(int version) const
// {
// QByteArray state;
// QDataStream stream(&state, QIODevice::WriteOnly);
// int count = 0;
// for (int i = 0; i < children().count(); ++i)
// {
// QWidget* r = qobject_cast<QWidget*>(children()[i]);
// if (r) {
// count++;
// }
// }
// stream << VersionMarker;
// stream << version;
// stream << count;
// for (int i = 0; i < children().count(); ++i)
// {
// QWidget* r = qobject_cast<QWidget*>(children()[i]);
// if (r)
// {
// stream << r->objectName();
// if (r->isHidden()) {
// stream << (int) 0;
// } else {
// stream << (int) 1;
// }
// }
// }
// return state;
// }
void RollupWidget::saveState(RollupState &state) const
{
QList<RollupState::RollupChildState>& childrenStates = state.getChildren();
childrenStates.clear();
for (const auto &child : children())
{
QWidget* r = qobject_cast<QWidget*>(child);
if (r && isRollupChild(r)) {
childrenStates.push_back({r->objectName(), r->isHidden()});
}
}
}
// bool RollupWidget::restoreState(const QByteArray& state, int version)
// {
// if (state.isEmpty()) {
// return false;
// }
// QByteArray sd = state;
// QDataStream stream(&sd, QIODevice::ReadOnly);
// int marker, v;
// stream >> marker;
// stream >> v;
// if ((stream.status() != QDataStream::Ok) || (marker != VersionMarker) || (v != version)) {
// return false;
// }
// int count;
// stream >> count;
// if (stream.status() != QDataStream::Ok) {
// return false;
// }
// for (int i = 0; i < count; ++i)
// {
// QString name;
// int visible;
// stream >> name;
// stream >> visible;
// if (stream.status() != QDataStream::Ok) {
// return false;
// }
// for (int j = 0; j < children().count(); ++j)
// {
// QWidget* r = qobject_cast<QWidget*>(children()[j]);
// if (r)
// {
// if (r->objectName() == name)
// {
// if (visible) {
// r->show();
// } else {
// r->hide();
// }
// break;
// }
// }
// }
// }
// return true;
// }
void RollupWidget::restoreState(const RollupState& state)
{
const QList<RollupState::RollupChildState>& childrenStates = state.getChildren();
for (const auto &object : children())
{
QWidget* r = qobject_cast<QWidget*>(object);
if (r && isRollupChild(r))
{
for (const auto &childState : childrenStates)
{
if (childState.m_objectName.compare(r->objectName()) == 0)
{
if (childState.m_isHidden) {
r->hide();
} else {
r->show();
}
break;
}
}
}
}
}
void RollupWidget::setTitleColor(const QColor& c)
{
m_titleColor = c;
float l = 0.2126*c.redF() + 0.7152*c.greenF() + 0.0722*c.blueF();
m_titleTextColor = l < 0.5f ? Qt::white : Qt::black;
update();
}
void RollupWidget::setHighlighted(bool highlighted)
{
if (m_highlighted != highlighted)
{
m_highlighted = highlighted;
update();
}
}
int RollupWidget::arrangeRollups()
{
QFontMetrics fm(font());
int pos;
// First calculate minimum height needed, to determine how much extra space
// we have that can be split between expanding widgets
pos = fm.height() + 4;
int expandingChildren = 0;
for (int i = 0; i < children().count(); ++i)
{
QWidget* r = qobject_cast<QWidget*>(children()[i]);
if ((r != nullptr) && isRollupChild(r))
{
pos += fm.height() + 2;
if (!r->isHidden())
{
if (r->sizePolicy().verticalPolicy() & QSizePolicy::ExpandFlag) {
expandingChildren++;
}
int h = 0;
if (r->hasHeightForWidth()) {
h = r->heightForWidth(width() - 4);
} else {
h = r->minimumSizeHint().height();
}
pos += h + 5;
}
}
}
setMinimumHeight(pos);
// Split extra space equally between widgets
// If there's a remainder, we give it to the first widget
// In the future, we should probably respect 'Vertical Stretch'
int extraSpace;
int firstExtra;
if ((expandingChildren > 0) && (m_newHeight > pos))
{
int totalExtra = m_newHeight - pos;
extraSpace = totalExtra / expandingChildren;
firstExtra = totalExtra - (extraSpace * expandingChildren);
}
else
{
extraSpace = 0;
firstExtra = 0;
}
// Now reposition and resize child widgets
pos = fm.height() + 4;
for (int i = 0; i < children().count(); ++i)
{
QWidget* r = qobject_cast<QWidget*>(children()[i]);
if ((r != nullptr) && isRollupChild(r))
{
pos += fm.height() + 2;
if (!r->isHidden())
{
r->move(2, pos + 3);
int h = 0;
if (r->hasHeightForWidth()) {
h = r->heightForWidth(width() - 4);
} else {
h = r->minimumSizeHint().height();
}
if (r->sizePolicy().verticalPolicy() & QSizePolicy::ExpandFlag)
{
h += extraSpace;
h += firstExtra;
firstExtra = 0;
}
r->resize(width() - 4, h);
pos += r->height() + 5;
}
}
}
if (expandingChildren == 0) {
setMaximumHeight(pos);
} else {
setMaximumHeight(16777215);
}
updateGeometry();
return pos;
}
void RollupWidget::paintEvent(QPaintEvent*)
{
QPainter p(this);
QColor frame = palette().highlight().color();
// Eigenbau
QFontMetrics fm(font());
p.setRenderHint(QPainter::Antialiasing, true);
// Ecken (corners)
p.setPen(Qt::NoPen);
p.setBrush(palette().base());
p.drawRect(0, 0, 5, 5);
p.drawRect(width() - 5, 0, 5, 5);
p.drawRect(0, height() - 5, 5, 5);
p.drawRect(width() - 5, height() - 5, 5, 5);
// Rahmen (frame)
p.setPen(m_highlighted ? Qt::white : frame);
p.setBrush(palette().window());
QRectF r(rect());
r.adjust(0.5, 0.5, -0.5, -0.5);
p.drawRoundedRect(r, 3.0, 3.0, Qt::AbsoluteSize);
// Titel-Hintergrund (Title background)
p.setPen(Qt::NoPen);
p.setBrush(m_titleColor);
QPainterPath path;
path.moveTo(1.5, fm.height() + 2.5);
path.lineTo(width() - 1.5, fm.height() + 2.5);
path.lineTo(width() - 1.5, 3.5);
path.arcTo(QRectF(width() - 3.5, 0, 2.5, 2.5), 270, -90);
path.lineTo(3.5, 1.5);
path.arcTo(QRectF(1.5, 2.5, 2.5, 2.5), 90, 90);
p.drawPath(path);
// Titel-Abschlusslinie (Title closing line)
p.setPen(frame);
p.drawLine(QPointF(0.5, 2 + fm.height() + 1.5), QPointF(width() - 1.5, 2 + fm.height() + 1.5));
// Aktiv-Button links
p.setPen(QPen(palette().windowText().color(), 1.0));
p.setBrush(palette().light());
p.drawRoundedRect(QRectF(3.5, 3.5, fm.ascent(), fm.ascent()), 2.0, 2.0, Qt::AbsoluteSize);
p.setPen(QPen(Qt::white, 1.0));
p.drawText(QRectF(3.5, 2.5, fm.ascent(), fm.ascent()), Qt::AlignCenter, "c");
if (m_channelWidget)
{
// Stromkanal-Button links (Current channel)
p.setPen(QPen(palette().windowText().color(), 1.0));
p.setBrush(palette().light());
p.drawRoundedRect(QRectF(5.5 + fm.ascent(), 2.5, fm.ascent() + 2.0, fm.ascent() + 2.0), 2.0, 2.0, Qt::AbsoluteSize);
p.setPen(QPen(Qt::white, 1.0));
p.drawText(QRectF(5.5 + fm.ascent(), 2.5, fm.ascent() + 2.0, fm.ascent() + 2.0), Qt::AlignCenter, m_streamIndicator);
}
// Help button
if (!m_helpURL.isEmpty())
{
p.setRenderHint(QPainter::Antialiasing, true);
p.setPen(QPen(palette().windowText().color(), 1.0));
p.setBrush(palette().light());
r = QRectF(width() - 2*(3.5 + fm.ascent()), 3.5, fm.ascent(), fm.ascent());
p.drawRoundedRect(r, 2.0, 2.0, Qt::AbsoluteSize);
p.drawText(QRectF(width() - 2*(3.5 + fm.ascent()), 5, fm.ascent(), fm.ascent() - 2), Qt::AlignCenter, "?");
}
//p.drawLine(r.topLeft() + QPointF(1, 1), r.bottomRight() + QPointF(-1, -1));
//p.drawLine(r.bottomLeft() + QPointF(1, -1), r.topRight() + QPointF(-1, 1));
// Schließen-Button rechts (Close button on the right)
p.setRenderHint(QPainter::Antialiasing, true);
p.setPen(QPen(palette().windowText().color(), 1.0));
p.setBrush(palette().light());
r = QRectF(width() - 3.5 - fm.ascent(), 3.5, fm.ascent(), fm.ascent());
p.drawRoundedRect(r, 2.0, 2.0, Qt::AbsoluteSize);
p.setPen(QPen(palette().windowText().color(), 1.5));
p.drawLine(r.topLeft() + QPointF(1, 1), r.bottomRight() + QPointF(-1, -1));
p.drawLine(r.bottomLeft() + QPointF(1, -1), r.topRight() + QPointF(-1, 1));
// Titel
//p.setPen(palette().highlightedText().color());
p.setPen(m_titleTextColor);
p.drawText(QRect(2 + 2*fm.height() + 2, 2, width() - 6 - 3*fm.height(), fm.height()),
fm.elidedText(windowTitle(), Qt::ElideMiddle, width() - 6 - 3*fm.height(), 0));
// Rollups
int pos = fm.height() + 4;
const QObjectList& c = children();
QObjectList::ConstIterator w = c.begin();
QObjectList::ConstIterator n = c.begin();
for (n = c.begin(); n != c.end(); ++n)
{
if (qobject_cast<QWidget*>(*n) != nullptr) {
break;
}
}
for (w = n; w != c.end(); w = n)
{
if (n != c.end()) {
++n;
}
for (; n != c.end(); ++n)
{
if (qobject_cast<QWidget*>(*n) != nullptr) {
break;
}
}
pos += paintRollup(qobject_cast<QWidget*>(*w), pos, &p, n == c.end(), frame);
}
}
int RollupWidget::paintRollup(QWidget* rollup, int pos, QPainter* p, bool last, const QColor& frame)
{
QFontMetrics fm(font());
int height = 1;
// Titel-Abschlusslinie
if (!rollup->isHidden())
{
p->setPen(palette().dark().color());
p->drawLine(QPointF(1.5, pos + fm.height() + 1.5), QPointF(width() - 1.5, pos + fm.height() + 1.5));
p->setPen(palette().light().color());
p->drawLine(QPointF(1.5, pos + fm.height() + 2.5), QPointF(width() - 1.5, pos + fm.height() + 2.5));
height += 2;
}
else
{
if (!last)
{
p->setPen(frame);
p->drawLine(QPointF(1.5, pos + fm.height() + 1.5), QPointF(width() - 1.5, pos + fm.height() + 1.5));
height++;
}
}
// Titel
p->setPen(palette().windowText().color());
p->drawText(QRect(2 + fm.height(), pos, width() - 4 - fm.height(), fm.height()),
fm.elidedText(rollup->windowTitle(), Qt::ElideMiddle, width() - 4 - fm.height(), 0));
height += fm.height();
// Ausklapp-Icon
p->setPen(palette().windowText().color());
p->setBrush(palette().windowText());
if (!rollup->isHidden())
{
QPolygonF a;
a.append(QPointF(3.5, pos + 2));
a.append(QPointF(3.5 + fm.ascent(), pos + 2));
a.append(QPointF(3.5 + fm.ascent() / 2.0, pos + fm.height() - 2));
p->drawPolygon(a);
}
else
{
QPolygonF a;
a.append(QPointF(3.5, pos + 2));
a.append(QPointF(3.5, pos + fm.height() - 2));
a.append(QPointF(3.5 + fm.ascent(), pos + fm.height() / 2));
p->drawPolygon(a);
}
// Inhalt
if (!rollup->isHidden() && (!last))
{
// Rollup-Abschlusslinie
p->setPen(frame);
p->drawLine(QPointF(1.5, pos + fm.height() + rollup->height() + 6.5),
QPointF(width() - 1.5, pos + fm.height() + rollup->height() + 6.5));
height += rollup->height() + 4;
}
return height;
}
void RollupWidget::resizeEvent(QResizeEvent* size)
{
m_newHeight = size->size().height();
arrangeRollups();
QWidget::resizeEvent(size);
}
void RollupWidget::mousePressEvent(QMouseEvent* event)
{
QFontMetrics fm(font());
// menu box left
if (QRectF(3.5, 3.5, fm.ascent(), fm.ascent()).contains(event->pos()))
{
m_contextMenuType = ContextMenuChannelSettings;
emit customContextMenuRequested(event->globalPos());
return;
}
if (m_channelWidget)
{
// Stream channel menu left
if (QRectF(5.5 + fm.ascent(), 2.5, fm.ascent() + 2.0, fm.ascent() + 2.0).contains(event->pos()))
{
m_contextMenuType = ContextMenuStreamSettings;
emit customContextMenuRequested(event->globalPos());
return;
}
}
// help button
if(!m_helpURL.isEmpty() && QRectF(width() - 2*(3.5 + fm.ascent()), 3.5, fm.ascent(), fm.ascent()).contains(event->pos()))
{
QString url;
if (m_helpURL.startsWith("http")) {
url = m_helpURL;
} else {
url = QString("https://github.com/f4exb/sdrangel/blob/master/%1").arg(m_helpURL); // Something like "plugins/channelrx/chanalyzer/readme.md"
}
QDesktopServices::openUrl(QUrl(url));
return;
}
// close button right
if(QRectF(width() - 3.5 - fm.ascent(), 3.5, fm.ascent(), fm.ascent()).contains(event->pos())) {
close();
return;
}
// check if we need to change a rollup widget
int pos = fm.height() + 4;
for (int i = 0; i < children().count(); ++i)
{
QWidget* r = qobject_cast<QWidget*>(children()[i]);
if (r)
{
if ((event->y() >= pos) && (event->y() < (pos + fm.height() + 3)))
{
if (r->isHidden())
{
r->show();
//emit widgetRolled(r, true);
}
else
{
r->hide();
//emit widgetRolled(r, false);
}
arrangeRollups();
repaint();
return;
}
else
{
pos += fm.height() + 2;
if (!r->isHidden()) {
pos += r->height() + 5;
}
}
}
}
}
bool RollupWidget::event(QEvent* event)
{
if (event->type() == QEvent::ChildAdded)
{
((QChildEvent*)event)->child()->installEventFilter(this);
arrangeRollups();
}
else if (event->type() == QEvent::ChildRemoved)
{
((QChildEvent*)event)->child()->removeEventFilter(this);
arrangeRollups();
}
else if (event->type() == QEvent::LayoutRequest)
{
arrangeRollups();
}
return QWidget::event(event);
}
bool RollupWidget::eventFilter(QObject* object, QEvent* event)
{
if (event->type() == QEvent::Show)
{
if (children().contains(object))
{
arrangeRollups();
emit widgetRolled(qobject_cast<QWidget*>(object), true);
}
}
else if (event->type() == QEvent::Hide)
{
if (children().contains(object))
{
arrangeRollups();
emit widgetRolled(qobject_cast<QWidget*>(object), false);
}
}
else if (event->type() == QEvent::WindowTitleChange)
{
if (children().contains(object)) {
repaint();
}
}
return QWidget::eventFilter(object, event);
}
void RollupWidget::setStreamIndicator(const QString& indicator)
{
m_streamIndicator = indicator;
update();
}
bool RollupWidget::isRollupChild(QWidget *childWidget)
{
return (qobject_cast<QDialog*>(childWidget) == nullptr); // exclude Dialogs from rollups
}
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