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我已经实现QQuickItem了暴露于QML. 现在它在所有平台上都变得更有用了，但由于 Windows 中的某些原因，我们没有使用QML它的纯 QT 应用程序。

但是我无法实例化自定义QQuickItem，Qt有人可以帮我解决这个问题吗？

这是代码：
customItem.h

#include <QQuickItem>
#include <QQuickWindow>

class CustomItem : public QQuickItem
{
Q_OBJECT
public:
explicit CustomItem(QQuickItem *parent = 0);

signals:

public slots:
void paint();

private slots:
void handleWindowChanged(QQuickWindow * win);

};

customItem.cpp：

#include "customItem.h"

CustomItem::CustomItem(QQuickItem *parent) :
QQuickItem(parent)
{
connect(this, &CustomItem::windowChanged, this, &CustomItem::handleWindowChanged);
}

void CustomItem::paint()
{
QQuickWindow * win = window();
qreal ratio = win->devicePixelRatio();
int w = int(ratio * win->width());
int h = int(ratio * win->height());
glViewport(0, 0, w, h);

glDisable(GL_DEPTH_TEST);
glClearColor(0, 1, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);

}

void CustomItem::handleWindowChanged(QQuickWindow * win)
{
if (win) {
connect(win, &QQuickWindow::beforeRendering, this, &CustomItem::paint, Qt::DirectConnection);
    win->setClearBeforeRendering(false);
}

}

主.cpp：

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QQuickView  *view = new QQuickView ();
    QWidget *container = QWidget::createWindowContainer(view);

    CustomItem *customitem = new CustomItem();///how can i set it view 
    container->show();

    return app.exec();
}

问题： 无法实例化 CustomItem

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0 回答 0