sdrangel/sdrgui/gui/rollupcontents.cpp

428 wiersze
13 KiB
C++

///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2012 maintech GmbH, Otto-Hahn-Str. 15, 97204 Hoechberg, Germany //
// written by Christian Daniel //
// Copyright (C) 2017, 2019-2020, 2022 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
// Copyright (C) 2020 Texas.C <ytexas96@yahoo.com> //
// Copyright (C) 2021-2022 Jon Beniston, M7RCE <jon@beniston.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 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/rollupcontents.h"
#include "settings/rollupstate.h"
RollupContents::RollupContents(QWidget* parent) :
QWidget(parent),
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);
}
void RollupContents::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()});
}
}
}
void RollupContents::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;
}
}
}
}
}
bool RollupContents::hasExpandableWidgets()
{
for (int i = 0; i < children().count(); ++i)
{
QWidget* r = qobject_cast<QWidget*>(children()[i]);
if (r && isRollupChild(r) && !r->isHidden() && (r->sizePolicy().verticalPolicy() == QSizePolicy::Expanding)) {
return true;
}
}
return false;
}
int RollupContents::arrangeRollups()
{
QFontMetrics fm(font());
int pos;
int minWidthHint = 0;
// First calculate minimum height needed, to determine how much extra space
// we have that can be split between expanding widgets
pos = 2; // 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();
}
minWidthHint = std::max(minWidthHint, r->minimumSizeHint().width());
pos += h + 5;
}
}
}
// We use minimumSizeHint for auto-calculated width, so
// minimumWidth can be set by user in .ui file
m_minimumSizeHint.setHeight(pos);
m_minimumSizeHint.setWidth(minWidthHint);
// However, we need to set minimumHeight, as the value in the .ui
// files is typically set as the minimum height for when widget is unrolled
// but when rolled-up, we want it to be smaller
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 = 2; // 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 RollupContents::paintEvent(QPaintEvent*)
{
QPainter p(this);
QColor frameColor = palette().highlight().color().darker(125);
// QColor frameColor = Qt::black;
// 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 : frameColor);
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);
// p.drawRect(r);
p.fillRect(r, palette().window());
// Rollups
int pos = 2; // 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(), frameColor);
}
}
int RollupContents::paintRollup(QWidget* rollup, int pos, QPainter* p, bool last, const QColor& frameColor)
{
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(frameColor);
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(frameColor);
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 RollupContents::resizeEvent(QResizeEvent* size)
{
m_newHeight = size->size().height();
arrangeRollups();
QWidget::resizeEvent(size);
}
void RollupContents::mousePressEvent(QMouseEvent* event)
{
QFontMetrics fm(font());
// check if we need to change a rollup widget
int pos = 2; // 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 RollupContents::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 RollupContents::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);
}
bool RollupContents::isRollupChild(QWidget *childWidget)
{
return (qobject_cast<QDialog*>(childWidget) == nullptr); // exclude Dialogs from rollups
}