From a81e09bcd3dfe9f7e44db60f9feb02284155aa6b Mon Sep 17 00:00:00 2001
From: Sine Striker <trueful@163.com>
Date: 周四, 14 12月 2023 14:46:43 +0800
Subject: [PATCH] minor tweaks

---
 examples/mainwindow/mainwindow.cpp |  171 +++++++++++++++++++++++++++++++++++++++++++++------------
 1 files changed, 135 insertions(+), 36 deletions(-)

diff --git a/examples/mainwindow/mainwindow.cpp b/examples/mainwindow/mainwindow.cpp
index e0c7151..47c7791 100644
--- a/examples/mainwindow/mainwindow.cpp
+++ b/examples/mainwindow/mainwindow.cpp
@@ -1,17 +1,23 @@
 #include "mainwindow.h"
 
 #include <QtCore/QDebug>
+#include <QtCore/QFile>
 #include <QtCore/QTime>
+#include <QtCore/QTimer>
+#include <QtWidgets/QApplication>
+#include <QtWidgets/QStyle>
 #include <QtWidgets/QPushButton>
 
 #include <QWKWidgets/widgetwindowagent.h>
 
 #include <widgetframe/windowbar.h>
+#include <widgetframe/windowbutton.h>
 
-class ClockWidget : public QPushButton {
+class ClockWidget : public QLabel {
 public:
-    explicit ClockWidget(QWidget *parent = nullptr) : QPushButton(parent) {
+    explicit ClockWidget(QWidget *parent = nullptr) : QLabel(parent) {
         startTimer(100);
+        setAlignment(Qt::AlignCenter);
     }
 
     ~ClockWidget() override = default;
@@ -24,9 +30,79 @@
 
 MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) {
     installWindowAgent();
+
+    auto clockWidget = new ClockWidget();
+    clockWidget->setObjectName("clock-widget");
+    clockWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+    setCentralWidget(clockWidget);
+
+    if (QFile qss(":/dark-style.qss"); qss.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        setStyleSheet(QString::fromUtf8(qss.readAll()));
+    }
+
+    setWindowTitle("Example MainWindow");
+    resize(640, 480);
+}
+
+static inline void emulateLeaveEvent(QWidget *widget) {
+    Q_ASSERT(widget);
+    if (!widget) {
+        return;
+    }
+    QTimer::singleShot(0, widget, [widget]() {
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
+        const QScreen *screen = widget->screen();
+#else
+        const QScreen *screen = widget->windowHandle()->screen();
+#endif
+        const QPoint globalPos = QCursor::pos(screen);
+        if (!QRect(widget->mapToGlobal(QPoint{0, 0}), widget->size()).contains(globalPos)) {
+            QCoreApplication::postEvent(widget, new QEvent(QEvent::Leave));
+            if (widget->testAttribute(Qt::WA_Hover)) {
+                const QPoint localPos = widget->mapFromGlobal(globalPos);
+                const QPoint scenePos = widget->window()->mapFromGlobal(globalPos);
+                static constexpr const auto oldPos = QPoint{};
+                const Qt::KeyboardModifiers modifiers = QGuiApplication::keyboardModifiers();
+#if (QT_VERSION >= QT_VERSION_CHECK(6, 4, 0))
+                const auto event =
+                    new QHoverEvent(QEvent::HoverLeave, scenePos, globalPos, oldPos, modifiers);
+                Q_UNUSED(localPos);
+#elif (QT_VERSION >= QT_VERSION_CHECK(6, 3, 0))
+                const auto event =  new QHoverEvent(QEvent::HoverLeave, localPos, globalPos, oldPos, modifiers);
+                Q_UNUSED(scenePos);
+#else
+                const auto event =  new QHoverEvent(QEvent::HoverLeave, localPos, oldPos, modifiers);
+                Q_UNUSED(scenePos);
+#endif
+                QCoreApplication::postEvent(widget, event);
+            }
+        }
+    });
 }
 
 MainWindow::~MainWindow() {
+}
+
+bool MainWindow::event(QEvent *event) {
+    switch (event->type()) {
+        case QEvent::WindowActivate: {
+            auto menu = menuWidget();
+            menu->setProperty("bar-active", true);
+            style()->polish(menu);
+            break;
+        }
+
+        case QEvent::WindowDeactivate: {
+            auto menu = menuWidget();
+            menu->setProperty("bar-active", false);
+            style()->polish(menu);
+            break;
+        }
+
+        default:
+            break;
+    }
+    return QMainWindow::event(event);
 }
 
 void MainWindow::installWindowAgent() {
@@ -35,37 +111,45 @@
         qFatal("Frameless handle failed to initialize.");
     }
 
-    auto titleLabel = new QLabel();
-    titleLabel->setAlignment(Qt::AlignCenter);
-
     auto menuBar = []() {
         auto menuBar = new QMenuBar();
-        auto file = new QMenu("File(&F)");
-        file->addAction(new QAction("New(&N)"));
-        file->addAction(new QAction("Open(&O)"));
+        auto file = new QMenu("File(&F)", menuBar);
+        file->addAction(new QAction("New(&N)", menuBar));
+        file->addAction(new QAction("Open(&O)", menuBar));
 
-        auto edit = new QMenu("Edit(&E)");
-        edit->addAction(new QAction("Undo(&U)"));
-        edit->addAction(new QAction("Redo(&R)"));
+        auto edit = new QMenu("Edit(&E)", menuBar);
+        edit->addAction(new QAction("Undo(&U)", menuBar));
+        edit->addAction(new QAction("Redo(&R)", menuBar));
 
         menuBar->addMenu(file);
         menuBar->addMenu(edit);
         return menuBar;
     }();
+    menuBar->setObjectName("win-menu-bar");
 
-    auto iconButton = new QPushButton("I");
-    iconButton->setAttribute(Qt::WA_Hover);
-    iconButton->setMouseTracking(true);
-    auto minButton = new QPushButton("鈥�");
-    minButton->setAttribute(Qt::WA_Hover);
-    minButton->setMouseTracking(true);
-    auto maxButton = new QPushButton("馃棖");
+    auto titleLabel = new QLabel();
+    titleLabel->setAlignment(Qt::AlignCenter);
+    titleLabel->setObjectName("win-title-label");
+
+    auto iconButton = new QWK::WindowButton();
+    iconButton->setObjectName("icon-button");
+    iconButton->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+
+    auto minButton = new QWK::WindowButton();
+    minButton->setObjectName("min-button");
+    minButton->setProperty("system-button", true);
+    minButton->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+
+    auto maxButton = new QWK::WindowButton();
     maxButton->setCheckable(true);
-    maxButton->setAttribute(Qt::WA_Hover);
-    maxButton->setMouseTracking(true);
-    auto closeButton = new QPushButton("鉁�");
-    closeButton->setAttribute(Qt::WA_Hover);
-    closeButton->setMouseTracking(true);
+    maxButton->setObjectName("max-button");
+    maxButton->setProperty("system-button", true);
+    maxButton->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+
+    auto closeButton = new QWK::WindowButton();
+    closeButton->setObjectName("close-button");
+    closeButton->setProperty("system-button", true);
+    closeButton->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
 
     auto windowBar = new QWK::WindowBar();
     windowBar->setIconButton(iconButton);
@@ -77,28 +161,43 @@
     windowBar->setHostWidget(this);
 
     agent->setTitleBar(windowBar);
-    agent->setSystemButton(QWK::CoreWindowAgent::WindowIcon, iconButton);
-    agent->setSystemButton(QWK::CoreWindowAgent::Minimize, minButton);
-    agent->setSystemButton(QWK::CoreWindowAgent::Maximize, maxButton);
-    agent->setSystemButton(QWK::CoreWindowAgent::Close, closeButton);
+    agent->setSystemButton(QWK::WindowAgentBase::WindowIcon, iconButton);
+    agent->setSystemButton(QWK::WindowAgentBase::Minimize, minButton);
+    agent->setSystemButton(QWK::WindowAgentBase::Maximize, maxButton);
+    agent->setSystemButton(QWK::WindowAgentBase::Close, closeButton);
     agent->setHitTestVisible(menuBar, true);
 
+#ifdef Q_OS_WINDOWS
+    // Emulate Window system menu button behaviors
+    connect(iconButton, &QAbstractButton::clicked, this, [iconButton, agent] {
+        iconButton->setProperty("double-click-close", false);
+
+        // Pick a suitable time threshold
+        QTimer::singleShot(75, [iconButton, agent]() {
+            if (iconButton->property("double-click-close").toBool())
+                return;
+            agent->showSystemMenu(iconButton->mapToGlobal({0, iconButton->height()}));
+        });
+    });
+    connect(iconButton, &QWK::WindowButton::doubleClicked, this, [iconButton, this]() {
+        iconButton->setProperty("double-click-close", true);
+        close();
+    });
+#endif
+
     connect(windowBar, &QWK::WindowBar::minimizeRequested, this, &QWidget::showMinimized);
-    connect(windowBar, &QWK::WindowBar::maximizeRequested, this, [this](bool max) {
+    connect(windowBar, &QWK::WindowBar::maximizeRequested, this, [this, maxButton](bool max) {
         if (max) {
             showMaximized();
         } else {
             showNormal();
         }
+
+        // It's a Qt issue that if a QAbstractButton::clicked triggers a window's maximization,
+        // the button remains to be hovered until the mouse move. As a result, we need to
+        // manually send leave events to the button.
+        emulateLeaveEvent(maxButton);
     });
     connect(windowBar, &QWK::WindowBar::closeRequested, this, &QWidget::close);
-
-    auto clockWidget = new ClockWidget();
-    clockWidget->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-
     setMenuWidget(windowBar);
-    setCentralWidget(clockWidget);
-    setWindowTitle("Example MainWindow");
-    // setContentsMargins({0, 1, 0, 0});
-    resize(640, 480);
 }

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