From 77bce901860548cd84c1680672ec75fbd6184cf8 Mon Sep 17 00:00:00 2001
From: Sine Striker <trueful@163.com>
Date: 周四, 22 2月 2024 15:40:09 +0800
Subject: [PATCH] Add new winIdChange event filter

---
 src/widgets/widgetitemdelegate.cpp |  121 ++++++++++++++++++++++++++++++++--------
 1 files changed, 97 insertions(+), 24 deletions(-)

diff --git a/src/widgets/widgetitemdelegate.cpp b/src/widgets/widgetitemdelegate.cpp
index 974f755..6980175 100644
--- a/src/widgets/widgetitemdelegate.cpp
+++ b/src/widgets/widgetitemdelegate.cpp
@@ -1,26 +1,55 @@
+// Copyright (C) 2023-2024 Stdware Collections (https://www.github.com/stdware)
+// Copyright (C) 2021-2023 wangwenx190 (Yuhang Zhao)
+// SPDX-License-Identifier: Apache-2.0
+
 #include "widgetitemdelegate_p.h"
 
 #include <QtGui/QMouseEvent>
-#include <QtWidgets/QWidget>
 #include <QtWidgets/QApplication>
+#include <QtWidgets/QWidget>
 
-extern Q_WIDGETS_EXPORT QWidget *qt_button_down;
+#include <QWKCore/private/abstractwindowcontext_p.h>
+
+extern Q_DECL_IMPORT QWidget *qt_button_down;
 
 namespace QWK {
+
+    class WidgetWinIdChangeEventFilter : public WinIdChangeEventFilter {
+    public:
+        explicit WidgetWinIdChangeEventFilter(QObject *host, AbstractWindowContext *ctx)
+            : WinIdChangeEventFilter(host, ctx), widget(static_cast<QWidget *>(host)) {
+            widget->installEventFilter(this);
+        }
+
+        WId winId() const override {
+            return widget->effectiveWinId();
+        }
+
+    protected:
+        bool eventFilter(QObject *obj, QEvent *event) override {
+            Q_UNUSED(obj)
+            if (event->type() == QEvent::WinIdChange) {
+                context->notifyWinIdChange();
+            }
+            return false;
+        }
+
+        QWidget *widget;
+    };
 
     WidgetItemDelegate::WidgetItemDelegate() = default;
 
     WidgetItemDelegate::~WidgetItemDelegate() = default;
 
-    QWindow *WidgetItemDelegate::window(QObject *obj) const {
+    QWindow *WidgetItemDelegate::window(const QObject *obj) const {
         return static_cast<const QWidget *>(obj)->windowHandle();
     }
 
-    bool WidgetItemDelegate::isEnabled(QObject *obj) const {
+    bool WidgetItemDelegate::isEnabled(const QObject *obj) const {
         return static_cast<const QWidget *>(obj)->isEnabled();
     }
 
-    bool WidgetItemDelegate::isVisible(QObject *obj) const {
+    bool WidgetItemDelegate::isVisible(const QObject *obj) const {
         return static_cast<const QWidget *>(obj)->isVisible();
     }
 
@@ -31,11 +60,11 @@
         return {originPoint, size};
     }
 
-    QWindow *WidgetItemDelegate::hostWindow(QObject *host) const {
+    QWindow *WidgetItemDelegate::hostWindow(const QObject *host) const {
         return static_cast<const QWidget *>(host)->windowHandle();
     }
 
-    bool WidgetItemDelegate::isHostSizeFixed(QObject *host) const {
+    bool WidgetItemDelegate::isHostSizeFixed(const QObject *host) const {
         const auto widget = static_cast<const QWidget *>(host);
         // "Qt::MSWindowsFixedSizeDialogHint" is used cross-platform actually.
         if (widget->windowFlags() & Qt::MSWindowsFixedSizeDialogHint) {
@@ -47,27 +76,71 @@
         if (!minSize.isEmpty() && !maxSize.isEmpty() && (minSize == maxSize)) {
             return true;
         }
-        // Usually set by the user.
-        const QSizePolicy sizePolicy = widget->sizePolicy();
-        if ((sizePolicy.horizontalPolicy() == QSizePolicy::Fixed)
-            && (sizePolicy.verticalPolicy() == QSizePolicy::Fixed)) {
-            return true;
-        }
         return false;
     }
 
-    bool WidgetItemDelegate::resetQtGrabbedControl() const {
-        if (qt_button_down) {
-            static constexpr const auto invalidPos = QPoint{std::numeric_limits<int>::lowest(), std::numeric_limits<int>::lowest()};
-            const auto event =
-                new QMouseEvent(QEvent::MouseButtonRelease, invalidPos, invalidPos, invalidPos,
-                                Qt::LeftButton, QGuiApplication::mouseButtons() ^ Qt::LeftButton,
-                                QGuiApplication::keyboardModifiers());
-            QApplication::postEvent(qt_button_down, event);
-            qt_button_down = nullptr;
-            return true;
+    bool WidgetItemDelegate::isWindowActive(const QObject *host) const {
+        return static_cast<const QWidget *>(host)->isActiveWindow();
+    }
+
+    void WidgetItemDelegate::resetQtGrabbedControl(QObject *host) const {
+        Q_UNUSED(host);
+        if (!qt_button_down) {
+            return;
         }
-        return false;
+        static constexpr const auto invalidPos =
+            QPoint{std::numeric_limits<int>::lowest(), std::numeric_limits<int>::lowest()};
+        const auto event = new QMouseEvent(
+            QEvent::MouseButtonRelease, invalidPos, invalidPos, invalidPos, Qt::LeftButton,
+            QGuiApplication::mouseButtons() ^ Qt::LeftButton, QGuiApplication::keyboardModifiers());
+        QCoreApplication::postEvent(qt_button_down, event);
+        qt_button_down = nullptr;
+    }
+
+    Qt::WindowStates WidgetItemDelegate::getWindowState(const QObject *host) const {
+        return static_cast<const QWidget *>(host)->windowState();
+    }
+
+    void WidgetItemDelegate::setWindowState(QObject *host, Qt::WindowStates state) const {
+        static_cast<QWidget *>(host)->setWindowState(state);
+    }
+
+    void WidgetItemDelegate::setCursorShape(QObject *host, Qt::CursorShape shape) const {
+        static_cast<QWidget *>(host)->setCursor(QCursor(shape));
+    }
+
+    void WidgetItemDelegate::restoreCursorShape(QObject *host) const {
+        static_cast<QWidget *>(host)->unsetCursor();
+    }
+
+    Qt::WindowFlags WidgetItemDelegate::getWindowFlags(const QObject *host) const {
+        return static_cast<const QWidget *>(host)->windowFlags();
+    }
+
+    QRect WidgetItemDelegate::getGeometry(const QObject *host) const {
+        return static_cast<const QWidget *>(host)->geometry();
+    }
+
+    void WidgetItemDelegate::setWindowFlags(QObject *host, Qt::WindowFlags flags) const {
+        static_cast<QWidget *>(host)->setWindowFlags(flags);
+    }
+
+    void WidgetItemDelegate::setWindowVisible(QObject *host, bool visible) const {
+        static_cast<QWidget *>(host)->setVisible(visible);
+    }
+
+    void WidgetItemDelegate::setGeometry(QObject *host, const QRect &rect) {
+        static_cast<QWidget *>(host)->setGeometry(rect);
+    }
+
+    void WidgetItemDelegate::bringWindowToTop(QObject *host) const {
+        static_cast<QWidget *>(host)->raise();
+    }
+
+    WinIdChangeEventFilter *
+        WidgetItemDelegate::createWinIdEventFilter(QObject *host,
+                                                   AbstractWindowContext *context) const {
+        return new WidgetWinIdChangeEventFilter(host, context);
     }
 
 }
\ No newline at end of file

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