Totally fix top border issue on Win10 for QtWidgets

Sine Striker

2023-12-26 6b2d31247dc2c2804e571b31a71c8a423c1db9d4

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#include "widgetwindowagent_p.h"
 
#include <QtGui/QtEvents>
 
namespace QWK {
 
    class SystemButtonAreaWidgetEventFilter : public QObject {
    public:
        SystemButtonAreaWidgetEventFilter(QWidget *widget, AbstractWindowContext *ctx,
                                          QObject *parent = nullptr)
            : QObject(parent), widget(widget), ctx(ctx) {
            widget->installEventFilter(this);
        }
        ~SystemButtonAreaWidgetEventFilter() = default;
 
    protected:
        bool eventFilter(QObject *obj, QEvent *event) override {
            Q_UNUSED(obj)
            switch (event->type()) {
                case QEvent::Move:
                case QEvent::Resize: {
                    ctx->setSystemButtonArea(widget->geometry());
                    break;
                }
 
                default:
                    break;
            }
            return false;
        }
 
    protected:
        QWidget *widget;
        AbstractWindowContext *ctx;
    };
 
    QWidget *WidgetWindowAgent::systemButtonArea() const {
        Q_D(const WidgetWindowAgent);
        return d->systemButtonAreaWidget;
    }
 
    void WidgetWindowAgent::setSystemButtonArea(QWidget *widget) {
        Q_D(WidgetWindowAgent);
        auto ctx = d->context.get();
        d->systemButtonAreaWidget = widget;
        if (!widget) {
            d->systemButtonAreaWidgetEventFilter.reset();
            ctx->setSystemButtonArea({});
            return;
        }
        d->systemButtonAreaWidgetEventFilter =
            std::make_unique<SystemButtonAreaWidgetEventFilter>(widget, ctx);
    }
 
}