来自 Qt C++ 的倍频程图应用

发布于 2024-10-31 16:34:04 字数 1271 浏览 3 评论 0原文

我有一个 QT C++ 应用程序，它使用 QProcess 运行 Octave 程序。我可以通过读取标准输出/错误并使用 write 方法写入其标准输入（例如：octave->write("5 + 5\n");）来与它进行通信。

正如我告诉你的，我得到了来自八度的响应（从上面的例子中我得到“ans = 10”）。

然而，当我写入 Octave 标准输入的命令有一个“图”（例如，一个简单的图（[1 2 3 4 5]）;）时，实际的图形永远不会显示。我知道 Octave 运行 gnuplot，我已经安装了它，还有 gnuplot_x11。我什至通过执行 gnuplot_binary("/usr/bin/gnuplot"); 来更改 Octave 进程中的 gnuplot 二进制路径来自我的申请。我知道它运行良好，因为如果我检索新值，我就会得到正确的结果。但我不知道为什么 Octave 不显示图形。

在这里，我开始八度音程：

QStringList arguments;
arguments << "--persist";
octave->setProcessChannelMode(QProcess::MergedChannels);
octave->start("/usr/bin/octave", arguments);

在这里，我向八度音程过程编写命令：

if (octave->state() == QProcess::Running) {
    QString command = widget.txtInput->toPlainText();
    if (command.isEmpty()) {
        return;
    }
    command += "\n";
    octave->write(command.toAscii());
}

这样，我可以打印对文本编辑的八度音程响应：

widget.txtOutput->append(octave->readAll() + "\n");

最后，我在八度音程过程启动时使用它：

QString gnuplot_path(tr("\"/usr/bin/gnuplot\""));
QString gnuplot_cmd(tr("gnuplot_binary(%1)\n").arg(gnuplot_path));
octave->write(gnuplot_cmd.toAscii());

我将感谢您能给我的任何帮助。

提前致谢。

原文

I have a QT C++ application that runs the Octave program using QProcess. I am able to communicate with it by reading the standard output/error and writing to it's standard input using write method (for example: octave->write("5 + 5\n");).

As I told you I get response from octave (from the above example I get "ans = 10").

However, when the command I write to Octave standard input has a "plot" (for example, a simple plot([1 2 3 4 5]);), the actual graphic is never shown. I know Octave runs gnuplot, I have it installed, and gnuplot_x11 too. I even change the gnuplot binary path in my Octave process by executing gnuplot_binary("/usr/bin/gnuplot"); from MY APPLICATION. I know it runs good because if I retrieve the new value I get it right. But I don't know why Octave doesn't show the graphic.

Here I start octave:

QStringList arguments;
arguments << "--persist";
octave->setProcessChannelMode(QProcess::MergedChannels);
octave->start("/usr/bin/octave", arguments);

Here I write commands to octave process:

if (octave->state() == QProcess::Running) {
    QString command = widget.txtInput->toPlainText();
    if (command.isEmpty()) {
        return;
    }
    command += "\n";
    octave->write(command.toAscii());
}

With this I print the octave response to a text edit:

widget.txtOutput->append(octave->readAll() + "\n");

And finally, I use this when the octave process starts:

QString gnuplot_path(tr("\"/usr/bin/gnuplot\""));
QString gnuplot_cmd(tr("gnuplot_binary(%1)\n").arg(gnuplot_path));
octave->write(gnuplot_cmd.toAscii());

I will appreciate any help you could give me.

Thanks in advance.

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