Better workaround for win10 top border issue

Sine Striker

2024-02-25 40d73269371a9e2b142eb2be2bd2f70aff6346d2

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// 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 "quickwindowagent_p.h"
 
namespace QWK {
 
    class SystemButtonAreaItemHandler : public QObject {
    public:
        SystemButtonAreaItemHandler(QQuickItem *item, AbstractWindowContext *ctx,
                                    QObject *parent = nullptr);
        ~SystemButtonAreaItemHandler() override = default;
 
        void updateSystemButtonArea();
 
    protected:
        QQuickItem *item;
        AbstractWindowContext *ctx;
    };
 
    SystemButtonAreaItemHandler::SystemButtonAreaItemHandler(QQuickItem *item,
                                                             AbstractWindowContext *ctx,
                                                             QObject *parent)
        : QObject(parent), item(item), ctx(ctx) {
        connect(item, &QQuickItem::xChanged, this,
                &SystemButtonAreaItemHandler::updateSystemButtonArea);
        connect(item, &QQuickItem::yChanged, this,
                &SystemButtonAreaItemHandler::updateSystemButtonArea);
        connect(item, &QQuickItem::widthChanged, this,
                &SystemButtonAreaItemHandler::updateSystemButtonArea);
        connect(item, &QQuickItem::heightChanged, this,
                &SystemButtonAreaItemHandler::updateSystemButtonArea);
 
        ctx->setSystemButtonAreaCallback([item](const QSize &) {
            return QRectF(item->mapToScene(QPointF(0, 0)), item->size()).toRect(); //
        });
    }
 
    void SystemButtonAreaItemHandler::updateSystemButtonArea() {
        ctx->virtual_hook(AbstractWindowContext::SystemButtonAreaChangedHook, nullptr);
    }
 
    QQuickItem *QuickWindowAgent::systemButtonArea() const {
        Q_D(const QuickWindowAgent);
        return d->systemButtonAreaItem;
    }
 
    void QuickWindowAgent::setSystemButtonArea(QQuickItem *item) {
        Q_D(QuickWindowAgent);
        if (d->systemButtonAreaItem == item)
            return;
 
        auto ctx = d->context.get();
        d->systemButtonAreaItem = item;
        if (!item) {
            d->systemButtonAreaItemHandler.reset();
            ctx->setSystemButtonAreaCallback({});
            return;
        }
        d->systemButtonAreaItemHandler = std::make_unique<SystemButtonAreaItemHandler>(item, ctx);
    }
 
    ScreenRectCallback QuickWindowAgent::systemButtonAreaCallback() const {
        Q_D(const QuickWindowAgent);
        return d->systemButtonAreaItem ? nullptr : d->context->systemButtonAreaCallback();
    }
 
    void QuickWindowAgent::setSystemButtonAreaCallback(const ScreenRectCallback &callback) {
        Q_D(QuickWindowAgent);
        setSystemButtonArea(nullptr);
        d->context->setSystemButtonAreaCallback(callback);
    }
 
}