Pop up a progress bar on a pushed button (QML)

Alex11

Hey guys,

I have a problem with a progress bar in QML. Here is my QML file.

import QtQuick.Controls 1.4

Rectangle {
    id:root
    width: 500
    height: 550
    Launcher {
        id: launcher
    }

    Button {
        x: 125
        y: 400
        width: 262
        height: 45
        text: "Start"
        onClicked: {
            popup.open();
            launcher.open_terminal();
        }
        anchors.horizontalCenter: parent.horizontalCenter
    }

    Button {
        x: 125
        y: 450
        width: 262
        height: 45
        text: "Close"
        onClicked: {
            Qt.quit()

        }

        //highlighted: true
        anchors.horizontalCenter: parent.horizontalCenter
    }
    Image {
        anchors.horizontalCenter: parent.horizontalCenter
        source: "index.png"
    }

    Popup {
        id: popup
        ProgressBar {
            id: pb1
            minimumValue: 0
            maximumValue: 100
            value: 0
        }

        // Timer to show off the progress bar
        Timer {
            id: simpletimer
            interval: 100
            repeat: true
            running: true
            onTriggered: pb1.minimumValue < pb1.maximumValue ? pb1.value += 1.0 : pb1.value = pb1.value
        }
    }
}

Is very simple., "launcher.open_terminal();" run an external C++ executable. The problem is when i push the button the external executable start and after he is done the job the progress bar start. I wold like first to start the progress bar and after that the executable. Has anyone any idea how can i do this? So maybe a better idea then "popup". (i couldn't find other better solution)
Thank you. :)

VRonin

Can you show the body of Launcher::open_terminal()?

Alex11

Sore, here it is

void TerminalLauncher::open_terminal() {
    this->proc.start("C:\\Windows\\System32\\calc.exe", QIODevice::ReadWrite);
    this->proc.waitForFinished(-1);
}

jsulm

@Alex11 said in Pop up a progress bar on a pushed button (QML):

this->proc.waitForFinished(-1);

No wonder it does not work as you're waiting for the process to finish!
Why do you wait? Just remove that line.

Alex11

I can not do that because here calc.exe is just an example. In place of calc.exe i have my own executable and i need to wait until he finish because he write data in a xml file, and when he finish writing i lunch a new qml page with data from xml.
So i need to find a way that my external process to run until he finish and in the some time to start also the progress bar. Maybe with a new thread or something like this but i cannot find a way yet.

VRonin

Do not use the Sync API, connect a slot to the QProcess::finished signal to know when the process is done writing the xml and remove the waitForFinished

Alex11

ok, i will try to give a shut. I will came back with a result. Until now i can not fix it yet.