add quick border

Zhao Yuhang

2023-12-11 2f6c83c095724bbba0f43b2f2893ba73c17949a6

 src/quick/quickwindowagent.cpp

@@ -3,8 +3,81 @@
#include "quickitemdelegate_p.h"

#include <QtQuick/QQuickWindow>
#include <QtQuick/QQuickPaintedItem>
#include <QtQuick/private/qquickitem_p.h>
#include <QtQuick/private/qquickanchors_p.h>

namespace QWK {

    class BorderItem : public QQuickPaintedItem {
        Q_OBJECT

    public:
        explicit BorderItem(AbstractWindowContext *ctx, QQuickItem *parent = nullptr);
        ~BorderItem() override;

        void updateHeight();

        void paint(QPainter *painter) override;

        void itemChange(ItemChange change, const ItemChangeData &data) override;

    private:
        AbstractWindowContext *context;
    };

    BorderItem::BorderItem(AbstractWindowContext *ctx, QQuickItem *parent) : QQuickPaintedItem(parent), context(ctx) {
        setAntialiasing(true); // ### FIXME: do we need to enable or disable this?
        setMipmap(true); // ### FIXME: do we need to enable or disable this?
        setFillColor({}); // Will improve the performance a little bit.
        setOpaquePainting(true); // Will also improve the performance, we don't draw semi-transparent borders of course.

        auto parentPri = QQuickItemPrivate::get(parent);
        auto anchors = QQuickItemPrivate::get(this)->anchors();
        anchors->setTop(parentPri->top());
        anchors->setLeft(parentPri->left());
        anchors->setRight(parentPri->right());

        setZ(std::numeric_limits<qreal>::max());
    }

    BorderItem::~BorderItem() = default;

    void BorderItem::updateHeight() {
        bool native = false;
        quint32 thickness = 0;
        void *args[] = { &native, &thickness };
        context->virtual_hook(AbstractWindowContext::QueryBorderThicknessHook, &args);
        setHeight(thickness);
    }

    void BorderItem::paint(QPainter *painter) {
        auto rect = QRect{ QPoint{ 0, 0}, size().toSize() };
        auto region = QRegion{ rect };
        void *args[] = {
            painter,
            &rect,
            &region
        };
        context->virtual_hook(AbstractWindowContext::DrawBordersHook, args);
    }

    void BorderItem::itemChange(ItemChange change, const ItemChangeData &data) {
        QQuickPaintedItem::itemChange(change, data);
        switch (change) {
            case ItemSceneChange:
                if (data.window) {
                    connect(data.window, &QQuickWindow::activeChanged, this, [this](){ update(); });
                }
                Q_FALLTHROUGH();
            case ItemVisibleHasChanged:
            case ItemDevicePixelRatioHasChanged:
                updateHeight();
                break;
            default:
                break;
        }
    }

    QuickWindowAgentPrivate::QuickWindowAgentPrivate() {
    }
@@ -13,6 +86,7 @@
    }

    void QuickWindowAgentPrivate::init() {
        borderItem = std::make_unique<BorderItem>(context.get(), hostWindow->contentItem());
    }

    QuickWindowAgent::QuickWindowAgent(QObject *parent)
@@ -34,7 +108,7 @@
        }

        if (!d->setup(window, new QuickItemDelegate())) {
            return true;
            return false;
        }
        d->hostWindow = window;
        return true;
@@ -87,3 +161,5 @@
    }

}

#include "quickwindowagent.moc"