Storing a user's code in a combo box that calls out for its name when selected - qml

Question

I want to make two input text fields (let's call them X and Y) that are in page A,
X: code of the person, Y: name of the person,
Page A contains two text fields for input, and a combo box for selection (for delete purpose), an adding button, and a delete button,
Once the X and Y are filled in the text fields they are inputed using an 'add' button, I want them to be stored when the button is pressed so I can call them back in the page B, or in the combo box in page A,
Page B contains a combo box and a casual text output next to it, the X goes to the combo box, and the Y goes to the text that both are in page B
When I select in page B one X of the many X that already have been inputed, I want the text to change with what have been selected accordingly,
if I want to delete one of the X, I do so by selecting the combobox that exists in Page A and proceed pressing the delete button,
how to store both the X and Y in variables and insert them in comboboxes and the texts, and make a bond between them, connecting each name with its own code ?
PageA
import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.VirtualKeyboard 2.14
Item {
id:pageA
width: 1920
height: 1080
property alias codeIn: code.text
property alias nameIn: name.text
TextField{
id:code
y: 0
width: 200
height: 50
placeholderText: qsTr("Type the code here")
}
TextField{
id:name
x: 0
y: 65
width: 200
height: 50
placeholderText: qsTr("Type the name here")
}
ComboBox{
id:selectionForDelete
x: 320
y: 65
width: 200
height: 50
}
Button{
id:adding
x: 29
y:155
text: "add"
onClicked: {
code.clear()
name.clear()
}
}
Button{
id:deleting
x: 355
y: 155
text: "delete"
}
}
PageB
import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.VirtualKeyboard 2.14
Item {
id:pageB
width: 1920
height: 1080
ComboBox{
id:codeList
}
Text {
id: relatedName
y:70
text: qsTr("")
}
}

Answer 1

One very simple solution is to declare a ListModel in your main app and when you instantiate either PageA or PageB they will have read/write access to the ListModel.
//MainApp.qml
Page {
ListModel { id: listModel }
PageA { }
PageB { }
}
//PageA.qml
Page {
}
//PageB.qml
Page {
}
As an example, PageA gives the ability to add new users as well as delete existing users, whereas PageB gives the ability to search for existing users:
import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.15
Page {
RowLayout {
anchors.fill: parent
PageA {
Layout.fillWidth: true
Layout.preferredWidth: 200
Layout.fillHeight: true
}
PageB {
Layout.fillWidth: true
Layout.preferredWidth: 200
Layout.fillHeight: true
}
}
ListModel {
id: listModel
function appendUser(code, name) { append( { code, name } ); }
}
}
//PageA.qml
import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.15
Page {
ColumnLayout {
anchors.fill: parent
Frame {
Layout.fillWidth: true
Text { text: qsTr("PageA") }
}
Label { text: qsTr("Users") }
ListView {
Layout.fillWidth: true
Layout.fillHeight: true
model: listModel
delegate: Frame {
width: ListView.view.width
RowLayout {
width: parent.width
Text {
Layout.fillWidth: true
text: model.code + " " + model.name
}
Button {
text: qsTr("Delete")
onClicked: listModel.remove(model.index)
}
}
}
}
Label { text: qsTr("Create new user") }
TextField {
id: code
Layout.fillWidth: true
placeholderText: qsTr("Code")
}
TextField {
id: name
Layout.fillWidth: true
placeholderText: qsTr("Text")
}
Button {
enabled: code.text && name.text
text: qsTr("Add")
onClicked: listModel.appendUser(code.text, name.text)
}
}
}
//PageB.qml
import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.15
Page {
ColumnLayout {
anchors.fill: parent
Frame {
Layout.fillWidth: true
Text { text: qsTr("PageB") }
}
Label { text: qsTr("Select Code") }
ComboBox {
id: comboBox
model: listModel
textRole: "code"
valueRole: "name"
}
Label { text: qsTr("Selected Name") }
Text {
text: comboBox.currentValue ?? ""
}
Item {
Layout.fillHeight: true
}
}
}
You can Try it Online!