From 7aabc22e0b6841a46eb449398e4e8910352008cc Mon Sep 17 00:00:00 2001
From: Sine Striker <trueful@163.com>
Date: 周六, 09 12月 2023 15:10:23 +0800
Subject: [PATCH] Fix windows custom margins key mistake

---
 src/widgets/widgetitemdelegate.cpp |   54 +++++++++++++++++++++++++++++++++++++++---------------
 1 files changed, 39 insertions(+), 15 deletions(-)

diff --git a/src/widgets/widgetitemdelegate.cpp b/src/widgets/widgetitemdelegate.cpp
index 08b3804..186516d 100644
--- a/src/widgets/widgetitemdelegate.cpp
+++ b/src/widgets/widgetitemdelegate.cpp
@@ -12,16 +12,16 @@
 
     WidgetItemDelegate::~WidgetItemDelegate() = default;
 
-    QWindow *WidgetItemDelegate::window(QObject *obj) const {
-        return static_cast<QWidget *>(obj)->windowHandle();
+    QWindow *WidgetItemDelegate::window(const QObject *obj) const {
+        return static_cast<const QWidget *>(obj)->windowHandle();
     }
 
-    bool WidgetItemDelegate::isEnabled(QObject *obj) const {
-        return static_cast<QWidget *>(obj)->isEnabled();
+    bool WidgetItemDelegate::isEnabled(const QObject *obj) const {
+        return static_cast<const QWidget *>(obj)->isEnabled();
     }
 
-    bool WidgetItemDelegate::isVisible(QObject *obj) const {
-        return static_cast<QWidget *>(obj)->isVisible();
+    bool WidgetItemDelegate::isVisible(const QObject *obj) const {
+        return static_cast<const QWidget *>(obj)->isVisible();
     }
 
     QRect WidgetItemDelegate::mapGeometryToScene(const QObject *obj) const {
@@ -31,18 +31,42 @@
         return {originPoint, size};
     }
 
-    bool WidgetItemDelegate::resetQtGrabbedControl() const {
-        if (qt_button_down) {
-            static constexpr const auto invalidPos = QPoint{-99999, -99999};
-            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;
+    QWindow *WidgetItemDelegate::hostWindow(const QObject *host) const {
+        return static_cast<const QWidget *>(host)->windowHandle();
+    }
+
+    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) {
+            return true;
+        }
+        // Caused by setFixedWidth/Height/Size().
+        const QSize minSize = widget->minimumSize();
+        const QSize maxSize = widget->maximumSize();
+        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;
     }
 
+    void WidgetItemDelegate::resetQtGrabbedControl() const {
+        if (!qt_button_down) {
+            return;
+        }
+        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;
+    }
+
 }
\ No newline at end of file

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