allow qml demo choose special effect

Yuhang Zhao

2023-12-28 68c8cc026233e9694579ce38b8daa25008477d18

 src/widgets/widgetwindowagent.cpp

@@ -5,75 +5,41 @@
#include <QtGui/QPainter>
#include <QtCore/QDebug>

#ifdef Q_OS_WINDOWS
#  include <QWKCore/private/win10borderhandler_p.h>
#endif

#include "widgetitemdelegate_p.h"

namespace QWK {

#ifdef Q_OS_WINDOWS
    class WidgetBorderHandler : public QObject, public Win10BorderHandler {
    public:
        explicit WidgetBorderHandler(QWidget *widget)
            : Win10BorderHandler(widget->windowHandle()), widget(widget) {
            widget->installEventFilter(this);
        }
    /*!
        \class WidgetWindowAgent
        \brief WindowAgentBase is the window agent for QtWidgets.

        void updateGeometry() override {
            if (widget->windowState() & (Qt::WindowMaximized | Qt::WindowFullScreen)) {
                widget->setContentsMargins({});
            } else {
                widget->setContentsMargins({0, int(m_borderThickness), 0, 0});
            }
        }
        It provides interfaces for QtWidgets and processes some Qt events related to the QWidget
        instance.
    */

        void requestUpdate() override {
            widget->update();
        }
    WidgetWindowAgentPrivate::WidgetWindowAgentPrivate() = default;

        bool isActive() const override {
            return widget->isActiveWindow();
        }

    protected:
        bool eventFilter(QObject *obj, QEvent *event) override {
            switch (event->type()) {
                case QEvent::Paint: {
                    if (widget->windowState() & (Qt::WindowMaximized | Qt::WindowFullScreen))
                        break;
                    auto paintEvent = static_cast<QPaintEvent *>(event);
                    QPainter painter(widget);
                    paintBorder(painter, paintEvent->rect(), paintEvent->region());
                    return true;
                }
                default:
                    break;
            }
            return false;
        }

        QWidget *widget;
    };
#endif

    WidgetWindowAgentPrivate::WidgetWindowAgentPrivate() {
    }

    WidgetWindowAgentPrivate::~WidgetWindowAgentPrivate() {
    }
    WidgetWindowAgentPrivate::~WidgetWindowAgentPrivate() = default;

    void WidgetWindowAgentPrivate::init() {
    }

    /*!
        Constructs a widget agent, it's better to set the widget to setup as \a parent.
    */
    WidgetWindowAgent::WidgetWindowAgent(QObject *parent)
        : WidgetWindowAgent(*new WidgetWindowAgentPrivate(), parent) {
    }

    WidgetWindowAgent::~WidgetWindowAgent() {
    }
    /*!
        Destructor.
    */
    WidgetWindowAgent::~WidgetWindowAgent() = default;

    /*!
        Installs the window agent on the widget. The window agent will take over some of the window
        events, making the window look frameless.
    */
    bool WidgetWindowAgent::setup(QWidget *w) {
        Q_ASSERT(w);
        if (!w) {
@@ -88,43 +54,50 @@
        w->setAttribute(Qt::WA_DontCreateNativeAncestors);
        w->setAttribute(Qt::WA_NativeWindow);

        if (!d->setup(w, new WidgetItemDelegate())) {
            return false;
        }
        d->setup(w, new WidgetItemDelegate());
        d->hostWidget = w;

#ifdef Q_OS_WINDOWS
        // Install painting hook
        if (bool needPaintBorder;
            QMetaObject::invokeMethod(d->context.get(), "needWin10BorderHandler",
                                      Qt::DirectConnection, Q_RETURN_ARG(bool, needPaintBorder)),
            needPaintBorder) {
            QMetaObject::invokeMethod(d->context.get(), "setWin10BorderHandler",
                                      Qt::DirectConnection,
                                      Q_ARG(Win10BorderHandler *, new WidgetBorderHandler(w)));
        }
#if defined(Q_OS_WINDOWS) && QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDERS)
        d->setupWindows10BorderWorkaround();
#endif
        return true;
    }

    /*!
        Returns the title bar widget.
    */
    QWidget *WidgetWindowAgent::titleBar() const {
        Q_D(const WidgetWindowAgent);
        return static_cast<QWidget *>(d->context->titleBar());
    }

    /*!
        Sets the title bar widget, all system button and hit-test visible widget references that
        have been set will be removed.
    */
    void WidgetWindowAgent::setTitleBar(QWidget *w) {
        Q_D(WidgetWindowAgent);
        if (!d->context->setTitleBar(w)) {
            return;
        }
        Q_EMIT titleBarWidgetChanged(w);
#ifdef Q_OS_MAC
        setSystemButtonArea(nullptr);
#endif
        Q_EMIT titleBarChanged(w);
    }

    /*!
        Returns the system button of the given type.
    */
    QWidget *WidgetWindowAgent::systemButton(SystemButton button) const {
        Q_D(const WidgetWindowAgent);
        return static_cast<QWidget *>(d->context->systemButton(button));
    }

    /*!
        Sets the system button of the given type, the system buttons always receive mouse events so
        you don't need to call \c setHitTestVisible for them.
    */
    void WidgetWindowAgent::setSystemButton(SystemButton button, QWidget *w) {
        Q_D(WidgetWindowAgent);
        if (!d->context->setSystemButton(button, w)) {
@@ -133,23 +106,42 @@
        Q_EMIT systemButtonChanged(button, w);
    }

    /*!
        Returns \a true if the widget can receive mouse events on title bar.
    */
    bool WidgetWindowAgent::isHitTestVisible(const QWidget *w) const {
        Q_D(const WidgetWindowAgent);
        return d->context->isHitTestVisible(w);
    }

    /*!
        Makes the widget able to receive mouse events on title bar if \a visible is \c true.
        You're supposed to make sure that the specified widget \a w is a child or descendant
        of the title bar widget.
    */
    void WidgetWindowAgent::setHitTestVisible(const QWidget *w, bool visible) {
        Q_D(WidgetWindowAgent);
        d->context->setHitTestVisible(w, visible);
    }

    void WidgetWindowAgent::setHitTestVisible(const QRect &rect, bool visible) {
        Q_D(WidgetWindowAgent);
        d->context->setHitTestVisible(rect, visible);
    }

    /*!
        \internal
    */
    WidgetWindowAgent::WidgetWindowAgent(WidgetWindowAgentPrivate &d, QObject *parent)
        : WindowAgentBase(d, parent) {
        d.init();
    }

    /*!
        \fn void WidgetWindowAgent::titleBarChanged(const QWidget *w)

        This signal is emitted when the title bar widget is replaced.
    */

    /*!
        \fn void WidgetWindowAgent::systemButtonChanged(SystemButton button, const QWidget *w)

        This signal is emitted when a system button is replaced.
    */

}