Qt 1.6 | Enginio Manual | Enginio QML Examples - Social Todos | Login.qml Example File

Qt 1.6.3 Reference Documentation

# Login.qml Example File

socialtodos/Login.qml

      /****************************************************************************
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      ** Contact: http://www.qt.io/licensing/
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      ** This file is part of the QtEnginio module of the Qt Toolkit.
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      ** You may use this file under the terms of the BSD license as follows:
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      import QtQuick 2.1
      import QtQuick.Layouts 1.0
      import QtQuick.Controls 1.0 as Controls
      import Enginio 1.0

      Rectangle {
          width: 400
          height: 600

          Rectangle {
              id: header
              anchors.top: parent.top
              width: parent.width
              height: 70 * scaleFactor
              color: "white"

              Row {
                  id: logo
                  anchors.centerIn: parent
                  anchors.horizontalCenterOffset: -4
                  spacing: 4
                  Image {
                      source: "qrc:images/enginio.png"
                      width: 160 * scaleFactor ; height: 60 * scaleFactor
                      fillMode: Image.PreserveAspectFit
                  }
                  Text {
                      text: "Todos"
                      anchors.verticalCenter: parent.verticalCenter
                      anchors.verticalCenterOffset: -3
                      font.bold: true
                      font.pixelSize: 46 * scaleFactor
                      color: "#555"
                  }
              }
              Rectangle {
                  width: parent.width ; height: 1
                  anchors.bottom: parent.bottom
                  color: "#bbb"
              }
          }

          BorderImage {
              id: input

              width: parent.width
              anchors.top: header.bottom
              anchors.bottom: parent.bottom
              source: "qrc:images/delegate.png"
              border.left: 5; border.top: 5
              border.right: 5; border.bottom: 5

              Rectangle {
                  y: -1 ; height: 1
                  width: parent.width
                  color: "#bbb"
              }
              Rectangle {
                  y: 0 ; height: 1
                  width: parent.width
                  color: "white"
              }
          }

          Column {
              anchors.centerIn: parent
              anchors.alignWhenCentered: true
              width: 360 * scaleFactor
              spacing: 14 * intScaleFactor

              TextField {
                  id: nameInput
                  onAccepted: passwordInput.forceActiveFocus()
                  placeholderText: "Username"
                  KeyNavigation.tab: passwordInput
              }

              TextField {
                  id: passwordInput
                  onAccepted: login()
                  placeholderText: "Password"
                  echoMode: TextInput.Password
                  KeyNavigation.tab: loginButton
              }

              Row {
                  // button
                  spacing: 20 * scaleFactor
                  width: 360 * scaleFactor
                  anchors.horizontalCenter: parent.horizontalCenter
                  anchors.alignWhenCentered: true
                  TouchButton {
                      id: loginButton
                      text: "Login"
                      baseColor: "#7a5"
                      width: (parent.width - parent.spacing)/2
                      onClicked: login()
                      enabled: enginioClient.authenticationState !== Enginio.Authenticating && nameInput.text.length && passwordInput.text.length
                      KeyNavigation.tab: registerButton
                  }
                  TouchButton {
                      id: registerButton
                      text: "Register"
                      onClicked: registerAndLogin()
                      width: (parent.width - parent.spacing)/2
                      enabled: enginioClient.authenticationState !== Enginio.Authenticating && nameInput.text.length && passwordInput.text.length
                      KeyNavigation.tab: nameInput
                  }
              }
          }

          Text {
              id: statusText
              anchors.bottom: parent.bottom
              anchors.horizontalCenter: parent.horizontalCenter
              anchors.bottomMargin: 70 * scaleFactor
              font.pixelSize: 18 * scaleFactor
              color: "#444"
          }

          Component.onCompleted: {
              enginioClient.sessionAuthenticationError.connect(function(reply){
                  statusText.text = "Login failed: " + reply.errorString
              })

             enginioClient.sessionAuthenticated.connect(function(reply){
                 addUserToAllUsersGroup(reply.data.enginio_data.user.id)
              })
          }

          Controls.Stack.onStatusChanged: {
              if (Controls.Stack.status == Controls.Stack.Activating) {
                  nameInput.text = ""
                  passwordInput.text = ""
                  statusText.text = ""
                  nameInput.forceActiveFocus()
              }
          }

          function login() {
              statusText.text = "Logging in..."
              enginioClient.identity = null
              auth.user = nameInput.text
              auth.password = passwordInput.text
              enginioClient.identity = auth
          }

          // Register a new user and add her to the group "allUsers"
          function registerAndLogin() {
              statusText.text = "Creating user account..."
              var createAccount = enginioClient.create({ "username": nameInput.text, "password": passwordInput.text }, Enginio.UserOperation)
              createAccount.finished.connect(function() {
                  if (createAccount.errorType !== EnginioReply.NoError) {
                      statusText.text = "Account creation failed: " + createAccount.errorString
                  } else {
                      login()
                  }
              })
          }

          function addUserToAllUsersGroup(userId) {
              var groupQuery = enginioClient.query({ "query": { "name" : "allUsers" } }, Enginio.UsergroupOperation)

              groupQuery.finished.connect(function(){
                  if (groupQuery.errorType !== EnginioReply.NoError) {
                      statusText.text = groupQuery.errorString
                  } else if (groupQuery.data.results.length === 0 ){
                      statusText.text = "Usergroup 'allUsers' not found, check required backend configuration from Social Todos example documentation."
                  } else {
                      var addUserToGroupData = {
                          "id": groupQuery.data.results[0].id,
                          "member" : {
                              "id": userId,
                              "objectType": "users"
                          }
                      }
                      var addUserToGroup = enginioClient.create(addUserToGroupData, Enginio.UsergroupMembersOperation)
                      addUserToGroup.finished.connect(function(){
                          if (addUserToGroup.errorType === EnginioReply.NoError) {
                              switchToListsView()
                          } else if (addUserToGroup.errorType === EnginioReply.BackendError &&
                                     addUserToGroup.backendStatus === 400) {
                              //User already present in group, OK to proceed
                              switchToListsView()
                          } else {
                              statusText.text = "User add to group failed: " + JSON.stringify(addUserToGroup.data.errors[0])
                          }
                      })
                  }
              })
          }

          function switchToListsView() {
              mainView.push({ item: lists, properties: {"username": enginioClient.identity.user}})
          }
      }