I tried the code shown here: How to take ScreenShot Qt/QML
- 我尝试了这里显示的代码:如何截屏Qt/QML
On execution I am getting the error written in the title.
- 在执行过程中,我将在标题中写入错误。
My main.cpp is:
- 我的主cpp是:
#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQuickWindow>
#include <QImage>
#include <QDebug>
#include "screenshot.h"
#include <QQuickView>
#include <QQmlContext>
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
const char* drigUi = "DrigUI";
qmlRegisterType <screenCapture> (drigUi, 1, 0, "ScreenShot");
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
return app.exec();
}
I used this capture function:
- 我使用了这个捕获函数:
void screenCapture::capture(QString const &path) const
{
QImage img = currentView_->grabWindow();
img.save(path);
}
and added the following in the constructor:
- 并在构造函数中添加以下内容:
currentView_ = new QQuickView;
My main.qml :
- 我的主qml:
import QtQuick 2.4
import QtQuick.Window 2.2
import DrigUI 1.0
Window
{
visible: true
height: 370
width: 370
ScreenShot { id: screenShot }
Rectangle
{
id: ll
height: 30
width: 50
x: 180; y: 0; color: "red"
MouseArea
{
anchors.fill: parent
onClicked: screenShot.capture ("l.png")
}
}
}
ScreenCapture.h
#ifndef SCREENSHOT_H
#define SCREENSHOT_H
#include <QObject>
class QString;
class QQuickWindow;
class screenCapture : public QObject
{
Q_OBJECT
public:
explicit screenCapture (QQuickWindow *parent = 0);
public slots:
void capture (QString const &path) const;
private:
QQuickWindow *currentWindow;
};
#endif // SCREENSHOT_H
ScreenCapture.cpp:
#include <QPixmap>
#include <QQuickView>
#include <QDebug>
#include "screenshot.h"
screenCapture::screenCapture(QQuickWindow *currentWindow) :
QObject(0), currentWindow (currentWindow)
{
}
void screenCapture::capture (QString const &path) const
{
QImage p = currentWindow->grabWindow ();
bool kk = p.save (path);
qDebug () << kk;
}
main.cpp:
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
QQmlApplicationEngine engine;
engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
QObject *topLevel = engine.rootObjects().value(0);
QQuickWindow *window = qobject_cast<QQuickWindow *>(topLevel);
screenCapture launcher (window);
engine.rootContext()->setContextProperty("ScreenShot", &launcher);
window->show();
return app.exec();
}
Now, in QML side, we can directly use
- 现在,在QML方面,我们可以直接使用
ScreenShot.capture ("/home/*****/Desktop/l.png")
- 截图。捕获(“/ home / * * * * * /桌面/ l.png”)
anywhere we want. It works.
- 任何我们想要的。它的工作原理。
转自:获取窗口:场景图已经在使用中 - QQuickWindow::grabWindow: scene graph already in use - 开发者知识库 (itdaan.com)
c++ - QQuickWindow::grabWindow: scene graph already in use - Stack Overflow