相关疑难解决方法(0)

我想QWebKit用QWebEngine无头渲染器代替.我初始化页面load()并连接一个插槽loadFinished()以生成最终的.PNG图像.这曾经工作得很好,WebKit但失败了QWebEngine.

代码如下......

_webView = new QWebEngineView();

....

// Render the HTML to an image
QPainter painter(&image);
_webView->page()->view()->render(&painter);
painter.end();

我收到以下错误:

"请求没有窗口句柄的窗口小部件的共享上下文""QOpenGLWidget:如果没有与toplevel共享的上下文,则不能使用".

有没有人有使用渲染屏幕的例子QWebEngine？

我延长了QWebEngineView.

#ifndef MYQWEBENGINEVIEW_H
#define MYQWEBENGINEVIEW_H
#include <QWebEngineView>
class MyQWebEngineView : public QWebEngineView
{
public:
    MyQWebEngineView(QWidget *parent = 0);
    ~MyQWebEngineView();
protected:
    virtual void paintEvent(QPaintEvent *);
};
#endif // MYQWEBENGINEVIEW_H

但我不能被paintEvent(QPaintEvent *)召唤.

#include "myqwebengineview.h"
#include <QPaintEvent>
#include <QPainter>
#include <QWebEngineView>
#include <QWidget>

MyQWebEngineView::MyQWebEngineView(QWidget *parent):QWebEngineView(parent)
{
    qDebug() << "MyQWebEngineView(" << parent << ")";
    qDebug() << "Qt::WA_PaintOnScreen: " << testAttribute(Qt::WA_PaintOnScreen);
    //setAttribute(Qt::WA_PaintOnScreen, true);
}
MyQWebEngineView::~MyQWebEngineView()
{
}
void MyQWebEngineView::paintEvent(QPaintEvent * event)
{
    qDebug() << "paintEvent(" << event << ")";
    QWebEngineView::paintEvent(event);
    //QWidget::paintEvent(event); …