what I'm trying to do is create a separate QML file to handle called signals just for cleanliness sake.

I have:

Signal.qml (file that handles signals)

Content.qml (UI file with all components)

Main.qml (main QML file that houses the window for Content.qml)

I'm attempting to modify label text from Content.qml within Signal.qml inside of the signal function as shown:

property alias within Content.qml:

and then the signal function that needs to change label text:

There is no errors on output, just the label doesn't change like it should.

Signal:

import email 1.0
import "qrc:/ui/qml/component"
Email {
    onEmailListIndex: function(param1) {
        Content.progressBarLabelText = "testing"
        //label.text = qsTr(progressBar.value   " / "   progressBar.to   " Emails Sent")
        //progressBar.value = param1
    }

    onEmailListSize: function(param1) {
        //label.text = qsTr(progressBar.value   " / "   param1   " Emails Sent")
        //progressBar.to = param1
    }
}

Content:

import QtQuick.Window 2.12
import QtQuick.Controls 2.3
import QtQuick.Controls.Universal 2.15
Page {
    id: page
    width: 700
    height: 700
    anchors.fill: parent

    property alias progressBarLabelText: progressBarLabel.text


    Pane {
        id: mainContentPane
        visible: true
        anchors.fill: parent
        bottomPadding: 0
        horizontalPadding: 0
        padding: 0

        Rectangle {
            id: leftRectangle
            width: 100
            color: "#151515"
            anchors.left: parent.left
            anchors.top: parent.top
            anchors.bottom: parent.bottom
            anchors.bottomMargin: 0
            anchors.topMargin: 0
            anchors.leftMargin: 0

            ScrollView {
                id: leftScrollView
                anchors.fill: parent
                ScrollBar.horizontal.policy: ScrollBar.AlwaysOff
                ScrollBar.vertical.policy: ScrollBar.AlwaysOff
                clip: true


                ItemDelegate {
                    id: statusButton
                    x: 0
                    y: 99
                    width: 100
                    height: 100
                    text: qsTr("Status")
                    highlighted: false
                    padding: 12
                    antialiasing: true
                    layer.smooth: false
                    display: AbstractButton.TextUnderIcon
                    icon.source: "qrc:/ui/icon/flat-screen-monitor.png"
                }

                ItemDelegate {
                    id: emailButton
                    x: 0
                    y: 199
                    width: 100
                    height: 100
                    text: qsTr("Email")
                    layer.smooth: false
                    antialiasing: true
                    display: AbstractButton.TextUnderIcon
                    onPressed: programSignals.workerThread()
                    icon.source: "qrc:/ui/icon/mail.png"
                }

                ItemDelegate {
                    id: settingsButton
                    x: 0
                    y: 300
                    width: 100
                    height: 100
                    text: qsTr("Settings")
                    layer.smooth: false
                    antialiasing: true
                    padding: 12
                    display: AbstractButton.TextUnderIcon
                    icon.source: "qrc:/ui/icon/settings.png"
                }

                ItemDelegate {
                    id: homeButton
                    x: 0
                    y: 0
                    width: 100
                    height: 100
                    text: qsTr("Home")
                    layer.enabled: false
                    layer.smooth: false
                    display: AbstractButton.TextUnderIcon
                    antialiasing: true
                    padding: 12
                    onPressed: statusPane.visible=false
                    icon.source: "qrc:/ui/icon/home.png"
                }
            }
        }
        Rectangle {
            id: rightRectangle
            color: "#000000"
            anchors.left: leftRectangle.left
            anchors.right: parent.right
            anchors.top: parent.top
            anchors.bottom: parent.bottom
            anchors.leftMargin: 101
            anchors.bottomMargin: 0
            anchors.topMargin: 0
            anchors.rightMargin: 0


            ScrollView {
                id: statusPane
                anchors.fill: parent
                clip: false
                ScrollBar.horizontal.policy: ScrollBar.AlwaysOff
                ScrollBar.vertical.policy: ScrollBar.AlwaysOff
                ProgressBar {
                    id: emailProgressBar
                    anchors.left: parent.left
                    anchors.right: parent.right
                    anchors.top: parent.top
                    anchors.bottomMargin: 618
                    anchors.leftMargin: 107
                    anchors.topMargin: 664
                    anchors.rightMargin: 107
                    from: 0
                }

                Label {
                    id: progressBarLabel
                    anchors.left: parent.left
                    anchors.right: parent.right
                    anchors.top: parent.top
                    text: "lol"
                    horizontalAlignment: Text.AlignHCenter
                    verticalAlignment: Text.AlignVCenter
                    anchors.bottomMargin: 592
                    anchors.topMargin: 680
                    anchors.leftMargin: 107
                    anchors.rightMargin: 107
                }

            }

            ScrollView {
                id: homePane
                visible: false
                anchors.fill: parent
            }
        }

    }
}

Main:

import QtQuick.Window 2.15
import QtQuick.Controls.Universal 2.15
import email 1.0
import "component"
import "signal"
Window {
    id: window
    height: 700
    width: 700
    minimumHeight: 700
    minimumWidth: 700
    visible: true
    color: "#000000"
    title: qsTr("Email Program")
    Universal.theme: Universal.Dark
    Universal.accent: Universal.Violet
    Content {
        id: programContent
    }
    Signal{
        id: programSignals
    }
}

CodePudding user response：

You should reference the instance of Content (programContent) from the Signal file (instead of the type):

import email 1.0
import "qrc:/ui/qml/component"

Email {
    property var theContent
    onEmailListIndex: function(param1) {
        theContent.progressBarLabelText = "testing"
    }

}

and then from Window.qml supply it:

Content {
    id: programContent
}
Signal{
    id: programSignals
    theContent: programContent
}