[SOLVED] pyside or pyqt

sharky · 01-27-2014, 12:34 PM

python 2.7, qt 4.8.3, pyside 1.1.2

Trying to call a process without freezing the GUI.

Currently using subprocess.Popen

Code:

def setup_term(self):
        self.txtProjLog.clear()
        # select proj argument
        cursor = self.txtProjects.textCursor()
        projid = cursor.selectedText()
        QApplication.setOverrideCursor(Qt.WaitCursor)
        QApplication.processEvents()
        # in case no proj selected
        if projid == "":
           QMessageBox.information(self, "Error", "No Project Selected")
           return 
        command = ResDir + '/setproj.sh' + ' ' + projid
        process = subprocess.Popen(command.split(), stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
        pilog = process.communicate()[0]
        self.txtProjLog.append(pilog)
        QApplication.restoreOverrideCursor()

The setproj.sh script will set environment variables and open an xterm but the python/pyside GUI is frozen until the xterm started by setproj.sh is closed.
If anyone can tell me how to make subprocess.POpen interactive then please let me know.

Cheers,

dugan · 01-27-2014, 12:43 PM

Use a QProcess instead.

sharky · 01-27-2014, 02:20 PM

Quote:

Originally Posted by dugan

Use a QProcess instead.

Tried using QProcess and it breaks the setproj.sh script. I have no idea why. It works standalone and it works with subprocess.popen but using QProcess doesn't work.

I added statements in setproj.sh and verified that it was getting invoked but the xterm that setproj.sh invokes never appears when using QProcess.

This is the code I tried.

Code:

    def setup_term(self):
        self.txtProjLog.clear()
        cursor = self.txtProjects.textCursor()
        projid = cursor.selectedText()
        QApplication.setOverrideCursor(Qt.WaitCursor)
        QApplication.processEvents()
        if projid == "":
           QMessageBox.information(self, "Error", "No Project Selected")
           return 
        command = ResDir + '/setproj.sh' + ' ' + projid
        self.runner = QProcess(self)
        self.runner.readyReadStandardError.connect(self.StdInfo)
        self.runner.start(command)

    def StdInfo(self):
        newData = str(self.runner.readAllStandardOutput())
        self.txtProjLog.append(newData)

sharky · 01-28-2014, 02:04 PM

Had to fix another issue related to the way QProcess inputs stdio.

The subprocess was a script that outputs text with html tags. I was directing the output via stdio to a Qtextedit.

example;

Code:

echo "<font>this is info."
echo "this is more info.<\/font>"

Because QProcess inputs stdio one line at a time it was causing the tags to show up in the text widget. The fix was to put html tags on each line of output.

fix;

Code:

echo "<font>this is info.<\/font>"
echo "<font>this is more info.<\/font>"