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framelesshelper
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framelesshelper/src/widgets/framelesswidgetshelper.cpp

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/*
* MIT License
*
* Copyright (C) 2022 by wangwenx190 (Yuhang Zhao)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "framelesswidgetshelper.h"
#include <QtCore/qdebug.h>
#include <QtGui/qpainter.h>
#include <QtGui/qevent.h>
#include <QtGui/qwindow.h>
#include <QtWidgets/qboxlayout.h>
#include <QtWidgets/qlabel.h>
#include <QtWidgets/qpushbutton.h>
#include <framelesswindowsmanager.h>
#include <utils.h>
#include "framelesswidget.h"
FRAMELESSHELPER_BEGIN_NAMESPACE
static constexpr const char QT_MAINWINDOW_CLASS_NAME[] = "QMainWindow";
static const QString kSystemButtonStyleSheet = QStringLiteral(R"(
QPushButton {
border-style: none;
background-color: transparent;
}
QPushButton:hover {
background-color: #cccccc;
}
QPushButton:pressed {
background-color: #b3b3b3;
}
)");
FramelessWidgetsHelper::FramelessWidgetsHelper(QWidget *q, const Options options) : QObject(q)
{
Q_ASSERT(q);
if (!q) {
return;
}
this->q = q;
m_options = options;
initialize();
}
FramelessWidgetsHelper::~FramelessWidgetsHelper() = default;
bool FramelessWidgetsHelper::isNormal() const
{
return (q->windowState() == Qt::WindowNoState);
}
bool FramelessWidgetsHelper::isZoomed() const
{
return (q->isMaximized() || ((m_options & Option::DontTreatFullScreenAsZoomed) ? false : q->isFullScreen()));
}
void FramelessWidgetsHelper::setTitleBarWidget(QWidget *widget)
{
Q_ASSERT(widget);
if (!widget) {
return;
}
if (m_userTitleBarWidget == widget) {
return;
}
if (m_options & Option::UseStandardWindowLayout) {
if (m_systemTitleBarWidget && m_systemTitleBarWidget->isVisible()) {
m_mainLayout->removeWidget(m_systemTitleBarWidget);
m_systemTitleBarWidget->hide();
}
if (m_userTitleBarWidget) {
m_mainLayout->removeWidget(m_userTitleBarWidget);
m_userTitleBarWidget = nullptr;
}
m_userTitleBarWidget = widget;
m_mainLayout->insertWidget(0, m_userTitleBarWidget);
} else {
m_userTitleBarWidget = widget;
}
QMetaObject::invokeMethod(q, "titleBarWidgetChanged");
}
QWidget *FramelessWidgetsHelper::titleBarWidget() const
{
return m_userTitleBarWidget;
}
void FramelessWidgetsHelper::setContentWidget(QWidget *widget)
{
Q_ASSERT(widget);
if (!widget) {
return;
}
if (!(m_options & Option::UseStandardWindowLayout)) {
return;
}
if (m_userContentWidget == widget) {
return;
}
if (m_userContentWidget) {
m_userContentContainerLayout->removeWidget(m_userContentWidget);
m_userContentWidget = nullptr;
}
m_userContentWidget = widget;
m_userContentContainerLayout->addWidget(m_userContentWidget);
QMetaObject::invokeMethod(q, "contentWidgetChanged");
}
QWidget *FramelessWidgetsHelper::contentWidget() const
{
return m_userContentWidget;
}
void FramelessWidgetsHelper::setHitTestVisible(QWidget *widget)
{
Q_ASSERT(widget);
if (!widget) {
return;
}
static constexpr const bool visible = true;
const bool exists = m_hitTestVisibleWidgets.contains(widget);
if (visible && !exists) {
m_hitTestVisibleWidgets.append(widget);
}
if constexpr (!visible && exists) {
m_hitTestVisibleWidgets.removeAll(widget);
}
}
void FramelessWidgetsHelper::changeEventHandler(QEvent *event)
{
Q_ASSERT(event);
if (!event) {
return;
}
const QEvent::Type type = event->type();
if ((type != QEvent::WindowStateChange) && (type != QEvent::ActivationChange)) {
return;
}
const bool standardLayout = (m_options & Option::UseStandardWindowLayout);
if (type == QEvent::WindowStateChange) {
if (standardLayout) {
if (isZoomed()) {
m_systemMaximizeButton->setToolTip(tr("Restore"));
} else {
m_systemMaximizeButton->setToolTip(tr("Maximize"));
}
updateSystemButtonsIcon();
}
updateContentsMargins();
}
if (standardLayout) {
updateSystemTitleBarStyleSheet();
}
q->update();
}
void FramelessWidgetsHelper::paintEventHandler(QPaintEvent *event)
{
Q_ASSERT(event);
if (!event) {
return;
}
if (!shouldDrawFrameBorder()) {
return;
}
QPainter painter(q);
painter.save();
QPen pen = {};
pen.setColor(Utils::getFrameBorderColor(q->isActiveWindow()));
pen.setWidth(1);
painter.setPen(pen);
painter.drawLine(0, 0, q->width(), 0);
painter.restore();
}
void FramelessWidgetsHelper::mousePressEventHandler(QMouseEvent *event)
{
Q_ASSERT(event);
if (!event) {
return;
}
if (m_options & Option::DisableDragging) {
return;
}
if (event->button() != Qt::LeftButton) {
return;
}
#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
const QPoint scenePos = event->scenePosition().toPoint();
#else
const QPoint scenePos = event->windowPos().toPoint();
#endif
if (shouldIgnoreMouseEvents(scenePos)) {
return;
}
if (!isInTitleBarDraggableArea(scenePos)) {
return;
}
Utils::startSystemMove(m_window);
}
void FramelessWidgetsHelper::mouseReleaseEventHandler(QMouseEvent *event)
{
Q_ASSERT(event);
if (!event) {
return;
}
if (m_options & Option::DisableSystemMenu) {
return;
}
if (event->button() != Qt::RightButton) {
return;
}
#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
const QPoint scenePos = event->scenePosition().toPoint();
#else
const QPoint scenePos = event->windowPos().toPoint();
#endif
if (shouldIgnoreMouseEvents(scenePos)) {
return;
}
if (!isInTitleBarDraggableArea(scenePos)) {
return;
}
#ifdef Q_OS_WINDOWS
# if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
const QPoint globalPos = event->globalPosition().toPoint();
# else
const QPoint globalPos = event->globalPos();
# endif
const QPoint nativePos = QPointF(QPointF(globalPos) * q->devicePixelRatioF()).toPoint();
Utils::showSystemMenu(m_window, nativePos);
#endif
}
void FramelessWidgetsHelper::mouseDoubleClickEventHandler(QMouseEvent *event)
{
Q_ASSERT(event);
if (!event) {
return;
}
if ((m_options & Option::NoDoubleClickMaximizeToggle) || Utils::isWindowFixedSize(m_window)) {
return;
}
if (event->button() != Qt::LeftButton) {
return;
}
#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
const QPoint scenePos = event->scenePosition().toPoint();
#else
const QPoint scenePos = event->windowPos().toPoint();
#endif
if (shouldIgnoreMouseEvents(scenePos)) {
return;
}
if (!isInTitleBarDraggableArea(scenePos)) {
return;
}
toggleMaximized();
}
void FramelessWidgetsHelper::initialize()
{
if (m_initialized) {
return;
}
m_initialized = true;
// Without this flag, Qt will always create an invisible native parent window
// for any native widgets which will intercept some win32 messages and confuse
// our own native event filter, so to prevent some weired bugs from happening,
// just disable this feature.
q->setAttribute(Qt::WA_DontCreateNativeAncestors);
// Force the widget become a native window now so that we can deal with its
// win32 events as soon as possible.
q->setAttribute(Qt::WA_NativeWindow);
m_window = q->windowHandle();
Q_ASSERT(m_window);
if (!m_window) {
return;
}
m_window->setProperty(kInternalOptionsFlag, QVariant::fromValue(m_options));
if (m_options & Option::UseStandardWindowLayout) {
if (q->inherits(QT_MAINWINDOW_CLASS_NAME)) {
m_options &= ~Options(Option::UseStandardWindowLayout);
qWarning() << "\"Option::UseStandardWindowLayout\" is not compatible with QMainWindow and it's subclasses."
" Enabling this option will mess up with your main window's layout.";
}
}
if (m_options & Option::BeCompatibleWithQtFramelessWindowHint) {
Utils::tryToBeCompatibleWithQtFramelessWindowHint(q->winId(),
[this]() -> Qt::WindowFlags { return q->windowFlags(); },
[this](const Qt::WindowFlags flags) -> void { q->setWindowFlags(flags); },
true);
}
FramelessWindowsManager *manager = FramelessWindowsManager::instance();
manager->addWindow(m_window);
connect(manager, &FramelessWindowsManager::systemThemeChanged, this, [this](){
if (m_options & Option::UseStandardWindowLayout) {
updateSystemTitleBarStyleSheet();
updateSystemButtonsIcon();
q->update();
}
QMetaObject::invokeMethod(q, "systemThemeChanged");
});
setupInitialUi();
if (!(m_options & Option::DontMoveWindowToDesktopCenter)) {
Utils::moveWindowToDesktopCenter(
[this]() -> QScreen * {
#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
return q->screen();
#else
return m_window->screen();
#endif
},
[this]() -> QSize { return q->size(); },
[this](const int x, const int y) -> void { q->move(x, y); },
true);
}
}
void FramelessWidgetsHelper::createSystemTitleBar()
{
if (!(m_options & Option::UseStandardWindowLayout)) {
return;
}
m_systemTitleBarWidget = new QWidget(q);
m_systemTitleBarWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
m_systemTitleBarWidget->setFixedHeight(kDefaultTitleBarHeight);
m_systemWindowTitleLabel = new QLabel(m_systemTitleBarWidget);
m_systemWindowTitleLabel->setFrameShape(QFrame::NoFrame);
QFont windowTitleFont = q->font();
windowTitleFont.setPointSize(11);
m_systemWindowTitleLabel->setFont(windowTitleFont);
m_systemWindowTitleLabel->setText(q->windowTitle());
connect(q, &FramelessWidget::windowTitleChanged, m_systemWindowTitleLabel, &QLabel::setText);
m_systemMinimizeButton = new QPushButton(m_systemTitleBarWidget);
m_systemMinimizeButton->setFixedSize(kDefaultSystemButtonSize);
m_systemMinimizeButton->setIconSize(kDefaultSystemButtonIconSize);
m_systemMinimizeButton->setToolTip(tr("Minimize"));
connect(m_systemMinimizeButton, &QPushButton::clicked, q, &FramelessWidget::showMinimized);
m_systemMaximizeButton = new QPushButton(m_systemTitleBarWidget);
m_systemMaximizeButton->setFixedSize(kDefaultSystemButtonSize);
m_systemMaximizeButton->setIconSize(kDefaultSystemButtonIconSize);
m_systemMaximizeButton->setToolTip(tr("Maximize"));
connect(m_systemMaximizeButton, &QPushButton::clicked, this, &FramelessWidgetsHelper::toggleMaximized);
m_systemCloseButton = new QPushButton(m_systemTitleBarWidget);
m_systemCloseButton->setFixedSize(kDefaultSystemButtonSize);
m_systemCloseButton->setIconSize(kDefaultSystemButtonIconSize);
m_systemCloseButton->setToolTip(tr("Close"));
connect(m_systemCloseButton, &QPushButton::clicked, q, &FramelessWidget::close);
updateSystemButtonsIcon();
const auto systemTitleBarLayout = new QHBoxLayout(m_systemTitleBarWidget);
systemTitleBarLayout->setContentsMargins(0, 0, 0, 0);
systemTitleBarLayout->setSpacing(0);
systemTitleBarLayout->addSpacerItem(new QSpacerItem(10, 10));
systemTitleBarLayout->addWidget(m_systemWindowTitleLabel);
systemTitleBarLayout->addStretch();
systemTitleBarLayout->addWidget(m_systemMinimizeButton);
systemTitleBarLayout->addWidget(m_systemMaximizeButton);
systemTitleBarLayout->addWidget(m_systemCloseButton);
m_systemTitleBarWidget->setLayout(systemTitleBarLayout);
}
void FramelessWidgetsHelper::createUserContentContainer()
{
if (!(m_options & Option::UseStandardWindowLayout)) {
return;
}
m_userContentContainerWidget = new QWidget(q);
m_userContentContainerWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
m_userContentContainerLayout = new QVBoxLayout(m_userContentContainerWidget);
m_userContentContainerLayout->setContentsMargins(0, 0, 0, 0);
m_userContentContainerLayout->setSpacing(0);
m_userContentContainerWidget->setLayout(m_userContentContainerLayout);
}
void FramelessWidgetsHelper::setupInitialUi()
{
if (m_options & Option::UseStandardWindowLayout) {
createSystemTitleBar();
createUserContentContainer();
m_mainLayout = new QVBoxLayout(q);
m_mainLayout->setContentsMargins(0, 0, 0, 0);
m_mainLayout->setSpacing(0);
m_mainLayout->addWidget(m_systemTitleBarWidget);
m_mainLayout->addWidget(m_userContentContainerWidget);
q->setLayout(m_mainLayout);
updateSystemTitleBarStyleSheet();
q->update();
}
updateContentsMargins();
}
bool FramelessWidgetsHelper::isInTitleBarDraggableArea(const QPoint &pos) const
{
const QRegion draggableRegion = [this]() -> QRegion {
const auto mapGeometryToScene = [this](const QWidget * const widget) -> QRect {
Q_ASSERT(widget);
if (!widget) {
return {};
}
return QRect(widget->mapTo(q, QPoint(0, 0)), widget->size());
};
if (m_userTitleBarWidget) {
QRegion region = mapGeometryToScene(m_userTitleBarWidget);
if (!m_hitTestVisibleWidgets.isEmpty()) {
for (auto &&widget : qAsConst(m_hitTestVisibleWidgets)) {
Q_ASSERT(widget);
if (widget) {
region -= mapGeometryToScene(widget);
}
}
}
return region;
}
if (m_options & Option::UseStandardWindowLayout) {
QRegion region = mapGeometryToScene(m_systemTitleBarWidget);
region -= mapGeometryToScene(m_systemMinimizeButton);
region -= mapGeometryToScene(m_systemMaximizeButton);
region -= mapGeometryToScene(m_systemCloseButton);
return region;
}
return {};
}();
return draggableRegion.contains(pos);
}
bool FramelessWidgetsHelper::shouldDrawFrameBorder() const
{
#ifdef Q_OS_WINDOWS
return (Utils::isWindowFrameBorderVisible() && !Utils::isWin11OrGreater()
&& isNormal() && !(m_options & Option::DontDrawTopWindowFrameBorder));
#else
return false;
#endif
}
bool FramelessWidgetsHelper::shouldIgnoreMouseEvents(const QPoint &pos) const
{
return (isNormal() && ((pos.x() < kDefaultResizeBorderThickness)
|| (pos.x() >= (q->width() - kDefaultResizeBorderThickness))
|| (pos.y() < kDefaultResizeBorderThickness)));
}
void FramelessWidgetsHelper::updateContentsMargins()
{
#ifdef Q_OS_WINDOWS
q->setContentsMargins(0, (shouldDrawFrameBorder() ? 1 : 0), 0, 0);
#endif
}
void FramelessWidgetsHelper::updateSystemTitleBarStyleSheet()
{
if (!(m_options & Option::UseStandardWindowLayout)) {
return;
}
const bool active = q->isActiveWindow();
const bool dark = Utils::shouldAppsUseDarkMode();
const bool colorizedTitleBar = Utils::isTitleBarColorized();
const QColor systemTitleBarWidgetBackgroundColor = [active, colorizedTitleBar, dark]() -> QColor {
if (active) {
if (colorizedTitleBar) {
return Utils::getDwmColorizationColor();
} else {
if (dark) {
return QColor(Qt::black);
} else {
return QColor(Qt::white);
}
}
} else {
if (dark) {
return kDefaultSystemDarkColor;
} else {
return QColor(Qt::white);
}
}
}();
const QColor systemWindowTitleLabelTextColor = (active ? ((dark || colorizedTitleBar) ? Qt::white : Qt::black) : Qt::darkGray);
m_systemWindowTitleLabel->setStyleSheet(QStringLiteral("color: %1;").arg(systemWindowTitleLabelTextColor.name()));
m_systemMinimizeButton->setStyleSheet(kSystemButtonStyleSheet);
m_systemMaximizeButton->setStyleSheet(kSystemButtonStyleSheet);
m_systemCloseButton->setStyleSheet(kSystemButtonStyleSheet);
m_systemTitleBarWidget->setStyleSheet(QStringLiteral("background-color: %1;").arg(systemTitleBarWidgetBackgroundColor.name()));
}
void FramelessWidgetsHelper::updateSystemButtonsIcon()
{
if (!(m_options & Option::UseStandardWindowLayout)) {
return;
}
const SystemTheme theme = ((Utils::shouldAppsUseDarkMode() || Utils::isTitleBarColorized()) ? SystemTheme::Dark : SystemTheme::Light);
const ResourceType resource = ResourceType::Icon;
m_systemMinimizeButton->setIcon(qvariant_cast<QIcon>(Utils::getSystemButtonIconResource(SystemButtonType::Minimize, theme, resource)));
if (isZoomed()) {
m_systemMaximizeButton->setIcon(qvariant_cast<QIcon>(Utils::getSystemButtonIconResource(SystemButtonType::Restore, theme, resource)));
} else {
m_systemMaximizeButton->setIcon(qvariant_cast<QIcon>(Utils::getSystemButtonIconResource(SystemButtonType::Maximize, theme, resource)));
}
m_systemCloseButton->setIcon(qvariant_cast<QIcon>(Utils::getSystemButtonIconResource(SystemButtonType::Close, theme, resource)));
}
void FramelessWidgetsHelper::toggleMaximized()
{
if (Utils::isWindowFixedSize(m_window)) {
return;
}
if (isZoomed()) {
q->showNormal();
} else {
q->showMaximized();
}
}
void FramelessWidgetsHelper::toggleFullScreen()
{
if (Utils::isWindowFixedSize(m_window)) {
return;
}
const Qt::WindowStates windowState = q->windowState();
if (windowState & Qt::WindowFullScreen) {
q->setWindowState(m_savedWindowState);
} else {
m_savedWindowState = windowState;
q->showFullScreen();
}
}
FRAMELESSHELPER_END_NAMESPACE
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