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/************************************************************************
**
** Copyright (C) 2019-2024 Kevin B. Hendricks, Stratford Ontario Canada
** Copyright (C) 2019-2024 Doug Massay
** Copyright (C) 2012 John Schember <john@nachtimwald.com>
** Copyright (C) 2012 Grant Drake
** Copyright (C) 2012 Dave Heiland
**
** This file is part of PageEdit.
**
** PageEdit 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, either version 3 of the License, or
** (at your option) any later version.
**
** PageEdit 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 for more details.
**
** You should have received a copy of the GNU General Public License
** along with PageEdit. If not, see <http://www.gnu.org/licenses/>.
**
*************************************************************************/
#include <QApplication>
#include <QTimer>
#include <QStyleFactory>
#include <QStyle>
#if QT_VERSION >= QT_VERSION_CHECK(6,5,0)
#include <QStyleHints>
#endif
#include <QPalette>
#include <QDebug>
#include "MainApplication.h"
#include "SettingsStore.h"
#include "PEDarkStyle.h"
#define DBG if(0)
MainApplication::MainApplication(int &argc, char **argv)
: QApplication(argc, argv),
m_isDark(false),
m_PaletteChangeTimer(new QTimer()),
m_AlwaysUseNFC(true)
{
// Do this only once early on in the PageEdit startup
if (qEnvironmentVariableIsSet("PAGEEDIT_DISABLE_NFC_NORMALIZATION")) m_AlwaysUseNFC = false;
// Keep track on our own of dark or light
m_isDark = qApp->palette().color(QPalette::Active,QPalette::WindowText).lightness() > 128;
// Set up PaletteChangeTimer to absorb multiple QEvents
// We need this for older < Qt 6.5 and as a backup mechanism for Linux
// Whose ability to detect theme changes is not in a good state
m_PaletteChangeTimer->setSingleShot(true);
m_PaletteChangeTimer->setInterval(50);
connect(m_PaletteChangeTimer, SIGNAL(timeout()),this, SLOT(systemColorChanged()));
m_PaletteChangeTimer->stop();
// Connect system color scheme change signal to reporting mechanism
// Note: This mechanism is very very unreliable on Linux (across many distributions and desktops)
// So fall back to the QApplication:Palette change event instead for all of Linux for now
#if QT_VERSION >= QT_VERSION_CHECK(6,5,0)
DBG qDebug() << "initial styleHints colorScheme: " << styleHints()->colorScheme();
if (styleHints()->colorScheme() == Qt::ColorScheme::Unknown) {
m_isDark = qApp->palette().color(QPalette::Active,QPalette::WindowText).lightness() > 128;
} else {
m_isDark = styleHints()->colorScheme() == Qt::ColorScheme::Dark;
}
connect(styleHints(), &QStyleHints::colorSchemeChanged, this, [this]() {
MainApplication::systemColorChanged();
});
#endif
}
bool MainApplication::event(QEvent *pEvent)
{
if (pEvent->type() == QEvent::ApplicationActivate) {
emit applicationActivated();
} else if (pEvent->type() == QEvent::ApplicationDeactivate) {
emit applicationDeactivated();
}
if (pEvent->type() == QEvent::ApplicationPaletteChange) {
// can be generated multiple times
DBG qDebug() << "Application Palette Changed";
#if QT_VERSION < QT_VERSION_CHECK(6,5,0) || (!defined(Q_OS_WIN32) && !defined(Q_OS_MAC))
// Use this approach as a backup for Linux currently
if (m_PaletteChangeTimer->isActive()) m_PaletteChangeTimer->stop();
m_PaletteChangeTimer->start();
#endif
}
return QApplication::event(pEvent);
}
void MainApplication::EmitPaletteChanged()
{
DBG qDebug() << "emitting applicationPaletteChanged";
emit applicationPaletteChanged();
}
void MainApplication::systemColorChanged()
{
// intential race on Linux so that both approaches work (typically won by styleHint() signal
// if it ever gets properly generated
m_PaletteChangeTimer->stop();
bool theme_changed = false;
bool isdark = qApp->palette().color(QPalette::Active,QPalette::WindowText).lightness() > 128;
DBG qDebug() << "reached systemColorChanged";
#if QT_VERSION < QT_VERSION_CHECK(6,5,0)
// in reality we really should not care if light or dark, just that theme changed
// but this is where we are at now
if (isdark != m_isDark) {
m_isDark = isdark;
theme_changed = true;
}
#else // Qt >= 6.5 and not Linux till it gets more robust
switch (styleHints()->colorScheme())
{
case Qt::ColorScheme::Light:
DBG qDebug() << "System Changed to Light Theme";
m_isDark = false;
theme_changed = true;
#ifdef Q_OS_WIN32
windowsLightThemeChange();
#endif // Q_OS_WIN32
break;
case Qt::ColorScheme::Unknown:
DBG qDebug() << "System Changed to Unknown Theme";
// This is typical needed for all linux where Qt can not properly
// identify the theme being used
if (isdark != m_isDark) {
m_isDark = isdark;
theme_changed = true;
}
break;
case Qt::ColorScheme::Dark:
DBG qDebug() << "System Changed to Dark Theme";
m_isDark = true;
theme_changed = true;
#ifdef Q_OS_WIN32
windowsDarkThemeChange();
#endif // Q_OS_WIN32
break;
}
#endif // Qt Version Check
if (theme_changed) QTimer::singleShot(0, this, SLOT(EmitPaletteChanged()));
}
void MainApplication::windowsDarkThemeChange()
{
SettingsStore settings;
if (settings.uiUseCustomDarkTheme()) {
QStyle* astyle = QStyleFactory::create("Fusion");
//setStyle(astyle);
// modify windows sigil palette to our dark
QStyle* bstyle;
bstyle = new PEDarkStyle(astyle);
setStyle(bstyle);
setPalette(style()->standardPalette());
}
}
void MainApplication::windowsLightThemeChange()
{
SettingsStore settings;
if (settings.uiUseCustomDarkTheme()) {
// Windows Fusion light mode
QStyle* astyle = QStyleFactory::create("Fusion");
setStyle(astyle);
setPalette(style()->standardPalette());
}
}
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