C++ QDBus发送int[]
我现在从QDBus开始。我正在尝试将一个int数组的数据发送到另一个程序,该程序将对数组进行一些计算,并应在之后将其发送回 我尝试将数组起始地址作为int发送。 我相信这里的问题是,我必须以某种方式发送一份值的副本,这样我的另一个prgoram就不会试图弄乱不是他的记忆 我当前正在获取此调试输出:C++ QDBus发送int[],c++,qt,dbus,C++,Qt,Dbus,我现在从QDBus开始。我正在尝试将一个int数组的数据发送到另一个程序,该程序将对数组进行一些计算,并应在之后将其发送回 我尝试将数组起始地址作为int发送。 我相信这里的问题是,我必须以某种方式发送一份值的副本,这样我的另一个prgoram就不会试图弄乱不是他的记忆 我当前正在获取此调试输出: sessionBus is connected... Starting line conversion... Done converting... Data at: -1077790240 Rep
sessionBus is connected...
Starting line conversion...
Done converting...
Data at: -1077790240
Reply invalid: Message recipient disconnected from message bus without replying
Starting line conversion...
Done converting...
Data at: -1077790240
Reply invalid: The name domain.comSim was not provided by any .service files
Starting line conversion...
Done converting...
Data at: -1077790240
Reply invalid: The name domain.comSim was not provided by any .service files
根据该代码:
void MainWindow::on_btnSend_clicked()
{
if (!QDBusConnection::sessionBus().isConnected())
{
qDebug() << "Cannot connect to the D-Bus session bus.\r\n";
return;
}
qDebug() << "sessionBus is connected...\r\n";
QDBusInterface iface(SERVICE_NAME, "/", "", QDBusConnection::sessionBus());
if (iface.isValid())
{
int height = this->image->height();
int width = this->image->width();
for(int lineCounter = 0; lineCounter < height; lineCounter++)
{
qDebug() << "Starting line conversion...\r\n";
QRgb* lineValues = (QRgb*)this->image->scanLine(lineCounter);
/*
QList<QVariant> args;
args << QVariant::fromValue(width);
for(int pixelCounter = 0; pixelCounter < width; pixelCounter++)
{
args << QVariant::fromValue(qAlpha(lineValues[pixelCounter]));
args << QVariant::fromValue(qRed(lineValues[pixelCounter]));
args << QVariant::fromValue(qGreen(lineValues[pixelCounter]));
args << QVariant::fromValue(qBlue(lineValues[pixelCounter]));
]
}*/
int values[width][4];
for(int c = 0; c < width; c++)
{
values[c][0] = qAlpha(lineValues[c]);
values[c][1] = qRed(lineValues[c]);
values[c][2] = qGreen(lineValues[c]);
values[c][3] = qBlue(lineValues[c]);
}
qDebug() << "Done converting...\r\n";
qDebug() << "Data at: " << (int)values << "\r\n";
QDBusReply<int> reply = iface.call("processLine", (int)values, width);
if (!reply.isValid())
{
qDebug() << "Reply invalid: " << qPrintable(reply.error().message()) << "\r\n";
}
}
}
else
{
qDebug() << "Interface is invalid: " << qPrintable(QDBusConnection::sessionBus().lastError().message());
}
}
和“processLine”如下所示:
class Simulation : public QObject
{
Q_OBJECT
public slots:
Q_SCRIPTABLE int processLine(int dataPtr, int length);
};
int Simulation::processLine(int dataPtr, int length)
{
//int values[length][4];
int** values = (int**)dataPtr;
cout << "Data should be at: " << dataPtr << endl;
cout << "Should start printing pixel values now:" << endl;
for(int c = 0; c < length; c++)
{
cout << "Pixel #" << c << ": Alpha:" << values[c][0] << " Red:" << values[c][1] << " Green:" << values[c][2] << " Blue:" << values[c][3] << endl;
}
return dataPtr;
}
int-Simulation::processLine(int-dataPtr,int-length)
{
//整数值[长度][4];
int**值=(int**)数据ptr;
cout因为最有可能的情况是,当你开始做一些你不熟悉的事情时,解决方案非常简单
我现在能够使用以下代码传输所有数据:
if (iface.isValid())
{
int height = this->image->height();
int width = this->image->width();
QImage* recvImage = new QImage(width, height, QImage::Format_ARGB32);
for(int lineCounter = 0; lineCounter < height; lineCounter++)
{
qDebug() << "Starting line conversion...\r\n";
QRgb* lineValues = (QRgb*)this->image->scanLine(lineCounter);
QList<int> values;
for(int c = 0; c < width; c++)
{
values.append(lineValues[c]);
//values.append(qAlpha(lineValues[c]));
//values.append(qRed(lineValues[c]));
//values.append(qGreen(lineValues[c]));
//values.append(qBlue(lineValues[c]));
}
QVariant arg;
arg.setValue(values);
QDBusReply<QList<int> > reply = iface.call("processLine", arg);
if (!reply.isValid())
{
qDebug() << "Reply invalid: " << qPrintable(reply.error().message()) << "\r\n";
}
QList<int> recvValues = reply.value();
QRgb* recvLineValues = (QRgb*)recvImage->scanLine(lineCounter);
for(int c = 0; c < width; c++)
{
//int alpha = recvValues.at(4*c);
//int red = recvValues.at(4*c);
//int green = recvValues.at(4*c);
//int blue = recvValues.at(4*c);
//recvLineValues[c] = qRgba(red, green, blue, alpha);
recvLineValues[c] = recvValues.at(c);
}
QGraphicsScene* scene = new QGraphicsScene();
QGraphicsPixmapItem* item = new QGraphicsPixmapItem(QPixmap::fromImage(*(this->image)));
scene->addItem(item);
ui->gViewRecvImage->setScene(scene);
ui->gViewRecvImage->show();
}
}
if(iface.isValid())
{
int height=此->图像->高度();
int width=this->image->width();
QImage*recvImage=新的QImage(宽度、高度、QImage::格式_ARGB32);
对于(int lineCounter=0;lineCounter扫描线(测线计数器);
QList值;
对于(int c=0;cgViewRecvImage->setScene(场景);
ui->gViewRecvImage->show();
}
}
为什么不发送一个std::vector
或QVector
?C样式的数组在很多方面都很糟糕..我试过使用QList,但无法调用“call”因为似乎缺少一些到QVariant的转换。但是要用VectorIface尝试同样的事情。call只接受QVariant作为参数传递到远程方法,遗憾的是,vector到QVariant没有隐式转换。我个人发送QVector
或std::v从来没有遇到过任何问题但是,如果你只是错过了一个转换到QVariant,那么你可以写这样的自己-虽然我困惑,为什么你需要-它应该已经存在。<代码> int值[宽度] [ 4 ];<代码>无效的C++。<代码> IFACE。调用(“PurrimeLINE”,(int)值,宽度);< /C> >(通常)仅将32位数据传递给processLine。使用QVariant报告的问题来自缺少的包含(很可能您没有#include