Add new winIdChange event filter

Sine Striker

2024-02-22 77bce901860548cd84c1680672ec75fbd6184cf8

 src/core/contexts/abstractwindowcontext.cpp

@@ -7,34 +7,12 @@
#include <QtGui/QPen>
#include <QtGui/QPainter>
#include <QtGui/QScreen>
#include <memory>

#include "qwkglobal_p.h"

namespace QWK {

    namespace {

        class WinIdChangeEventFilter : public QObject {
        public:
            explicit WinIdChangeEventFilter(QObject *widget, AbstractWindowContext *ctx,
                                            QObject *parent = nullptr)
                : QObject(parent), ctx(ctx) {
                widget->installEventFilter(this);
            }

        protected:
            bool eventFilter(QObject *obj, QEvent *event) override {
                Q_UNUSED(obj)
                if (event->type() == QEvent::WinIdChange) {
                    ctx->notifyWinIdChange();
                }
                return false;
            }

        protected:
            AbstractWindowContext *ctx;
        };

        class WindowEventFilter : public QObject {
        public:
@@ -77,16 +55,10 @@
        }
        m_host = host;
        m_delegate.reset(delegate);
        m_winIdChangeEventFilter = std::make_unique<WinIdChangeEventFilter>(host, this);
        m_winIdChangeEventFilter.reset(delegate->createWinIdEventFilter(host, this));
        m_windowEventFilter = std::make_unique<WindowEventFilter>(m_windowHandle, this);

        m_windowHandle = m_delegate->hostWindow(m_host);
        if (m_windowHandle) {
            winIdChanged();
        notifyWinIdChange();
        }
    }



    bool AbstractWindowContext::setHitTestVisible(const QObject *obj, bool visible) {
        Q_ASSERT(obj);
@@ -259,15 +231,21 @@
    }

    void AbstractWindowContext::notifyWinIdChange() {
        auto windowEventFilter = static_cast<WindowEventFilter *>(m_windowEventFilter.get());
        windowEventFilter->setWindow(nullptr);
        auto oldWinId = m_windowId;
        m_windowId = m_winIdChangeEventFilter->winId();

        // In Qt6, after QWidget::close() is called, the related QWindow's all surfaces and the
        // platform window will be removed, and the WinId will be set to 0. After that, when the
        // QWidget is shown again, the whole things will be recreated again.
        // As a result, we must update our WindowContext each time the WinId changes.
        m_windowHandle = m_delegate->hostWindow(m_host);
        winIdChanged();

        auto windowEventFilter = static_cast<WindowEventFilter *>(m_windowEventFilter.get());
        windowEventFilter->setWindow(nullptr);

        if (oldWinId != m_windowId) {
            winIdChanged(m_windowId, oldWinId);
        }

        if (m_windowHandle) {
            windowEventFilter->setWindow(m_windowHandle);