// Copyright (C) 2023-2024 Stdware Collections (https://www.github.com/stdware)
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// Copyright (C) 2021-2023 wangwenx190 (Yuhang Zhao)
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// SPDX-License-Identifier: Apache-2.0
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#include "quickwindowagent_p.h"
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#include <QtQuick/QQuickPaintedItem>
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#include <QtQuick/private/qquickitem_p.h>
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#include <QWKCore/qwindowkit_windows.h>
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#include <QWKCore/private/windows10borderhandler_p.h>
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namespace QWK {
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#if QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDERS)
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class DeferredDeleteHook;
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class BorderItem : public QQuickPaintedItem, public Windows10BorderHandler {
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public:
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explicit BorderItem(QQuickItem *parent, AbstractWindowContext *context);
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~BorderItem() override;
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void updateGeometry() override;
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public:
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void paint(QPainter *painter) override;
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void itemChange(ItemChange change, const ItemChangeData &data) override;
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protected:
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bool sharedEventFilter(QObject *obj, QEvent *event) override;
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std::unique_ptr<DeferredDeleteHook> paintHook;
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};
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class DeferredDeleteHook : public QObject {
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public:
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DeferredDeleteHook(BorderItem *item) : item(item) {
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}
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// Override deferred delete handler
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bool event(QEvent *event) override {
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if (event->type() == QEvent::DeferredDelete) {
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item->drawBorder();
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return true;
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}
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return QObject::event(event);
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}
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BorderItem *item;
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};
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BorderItem::BorderItem(QQuickItem *parent, AbstractWindowContext *context)
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: QQuickPaintedItem(parent), Windows10BorderHandler(context),
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paintHook(std::make_unique<DeferredDeleteHook>(this)) {
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setAntialiasing(true); // We need anti-aliasing to give us better result.
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setFillColor({}); // Will improve the performance a little bit.
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setOpaquePainting(true); // Will also improve the performance, we don't draw
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// semi-transparent borders of course.
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auto parentPri = QQuickItemPrivate::get(parent);
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auto anchors = QQuickItemPrivate::get(this)->anchors();
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anchors->setTop(parentPri->top());
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anchors->setLeft(parentPri->left());
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anchors->setRight(parentPri->right());
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setZ(std::numeric_limits<qreal>::max()); // Make sure our fake border always above
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// everything in the window.
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// First update
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if (context->windowId()) {
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setupNecessaryAttributes();
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}
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BorderItem::updateGeometry();
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}
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BorderItem::~BorderItem() = default;
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void BorderItem::updateGeometry() {
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setHeight(borderThickness());
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setVisible(isNormalWindow());
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}
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void BorderItem::paint(QPainter *painter) {
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Q_UNUSED(painter)
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// https://github.com/qt/qtdeclarative/blob/cc04afbb382fd4b1f65173d71f44d3372c47b0e1/src/quick/scenegraph/qsgthreadedrenderloop.cpp#L551
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// https://github.com/qt/qtdeclarative/blob/cc04afbb382fd4b1f65173d71f44d3372c47b0e1/src/quick/scenegraph/qsgthreadedrenderloop.cpp#L561
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// QCoreApplication must process all DeferredDelay events right away after rendering, we can
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// hook it by overriding a specifiy QObject's event handler and draw the native border in
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// it.
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paintHook->deleteLater();
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}
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void BorderItem::itemChange(ItemChange change, const ItemChangeData &data) {
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QQuickPaintedItem::itemChange(change, data);
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switch (change) {
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case ItemVisibleHasChanged:
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case ItemDevicePixelRatioHasChanged: {
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updateGeometry();
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break;
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}
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default:
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break;
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}
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}
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bool BorderItem::sharedEventFilter(QObject *obj, QEvent *event) {
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Q_UNUSED(obj)
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switch (event->type()) {
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case QEvent::WindowStateChange: {
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updateGeometry();
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break;
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}
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default:
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break;
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}
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return Windows10BorderHandler::sharedEventFilter(obj, event);
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}
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void QuickWindowAgentPrivate::setupWindows10BorderWorkaround() {
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// Install painting hook
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auto ctx = context.get();
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if (ctx->windowAttribute(QStringLiteral("win10-border-needed")).toBool()) {
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std::ignore = new BorderItem(hostWindow->contentItem(), ctx);
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}
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}
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#endif
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}
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