Qt Crash when switching between 'States'.

[Vyuvaraj]

Is there any restriction in using the number of states within a QML.
I have qml which contains 11 states + 1 default states.
When switching between specific state it crashes.
I'm using 'variant Changed:' event to change the variable that is used for 'when condition'.

import QtQuick 2.0
import QtGraphicalEffects 1.12

Item{
id:afTemplate
height: 360
property alias af_hme_butn: af_hme_butn
property alias af_menu_butn: af_menu_butn
property alias af_fun_butn: af_fun_butn
property alias menuScreenGrid: menuScreenGrid
property alias afScreenIcons: afScreenIcons

property int p_width: 585;
width: p_width
property string p_tpSide;
property string p_line_color: "blue"
property bool p_incomingCallNotification: false;
property bool p_sendConfig: false
property int p_cur_screen_ID  : m_isitleftside ? 108 : 208

property bool m_isitleftside : p_tpSide == "left"
property bool m_volume_adj : false
property bool m_audio_src  : false
property bool m_phone_src  : false
property bool m_play_songs : false

property int m_menu_state   : -1
property int m_pmnu_state   : -1
property int m_phme_scr_idx : -1
property int m_home_scr_idx : 0 // change this to change the first screen
property int m_menu_scr_idx : -1
property int m_func_scr_idx : -1

property int m_song_index   : -1
property int m_usbsong_idx: 0
property int m_btsong_idx: 0

property int m_send_screen_id : -1

property string m_heading_txt   : "Audio"
property variant m_main_img     : ["music.png", "phone.png", "Settings.png"]

property variant m_defaultstate : ["audio_src.png", "media-seek-backward.png","media-seek-forward.png"] //0.default
property variant m_funcstate0   : ["back.png", "media-seek-backward.png","media-seek-forward.png"]      //1.streaming menuselected
property variant m_funcstate1   : ["back.png", "textMessage.png", "outgoing_call.png"]
property variant m_funcstate2   : ["back.png", "send_message.png", "outgoing_call.png"]
property variant m_funcstate3   : ["cross.png", "textMessage.png", "tick.png"]
property variant m_funcstate4   : ["cross.png", "send_message.png", "tick.png"]
property variant m_funcstate5   : ["call_decline.png"]
property variant m_funcstate6   : ["dummyImage.png"]
property variant m_funcbtnImg   : [m_defaultstate,m_funcstate0,m_funcstate0,m_defaultstate,m_funcstate0,
    m_defaultstate,m_funcstate1,m_funcstate2,m_funcstate3,m_funcstate4,m_funcstate5,m_funcstate6]
property variant m_funcbtnNum   : [3,3,3,3,3,3,3,3,3,3,1,0]

property variant m_audio_img    : ["am-radio.png","fm-radio.png","Bluetooth.png","USB.png"]
property variant m_phone_img    : ["Phone_Book.png","call_history.png"];
property variant m_setng_img    : ["compass.png","swap.png"]
property variant m_menu_img     : [m_audio_img,m_phone_img,m_setng_img]

property variant m_audio_txt    : ["AM", "FM", "BT", "USB"]
property variant m_phone_txt    : ["Contacts", "Recent Calls"]
property variant m_setng_txt    : ["Compass", "Swap"]
property variant m_menu_txt     : [m_audio_txt, m_phone_txt,m_setng_txt]

property variant m_menu_offset  : [0,5,3]
property variant m_screenID    : m_isitleftside ? [108,106,106,101] : [208,206,206,201]
property variant m_listID      : m_isitleftside ? 109 : 209
property variant m_searchID    : m_isitleftside ? 111 : 211
property variant m_freeID      : m_isitleftside ? 105 : 201

property variant m_contact_img: ["img_avatar-female.png","img_avatar-male.png","defaultContact.png"]
property variant m_contactlist: ContactModel{}
property variant m_msglist: MsgModel {}
property variant m_usbsonglist: USB_SongsModel {}
property variant m_btsonglist: BT_SongsModel {}
property variant m_songlist: m_btsonglist;//m_audio_src ? m_usbsonglist : m_btsonglist

property int m_nof_songs: m_songlist.count
property variant m_artHeadingTxt: "ALBUM HEADING"
property variant m_artAlbumName: "Text"
property variant m_artArtistName: "text"
property variant m_artImg:"img_avatar-female.png"

//default actions
//h0-m0-f0;h1-m5-f0;h2-m3-f0 : change source
//h0-m1-f0;h0-m2-f0;h1-m6-f0;h1-m7-f0;h2-m4-f0 : go back
//h0-m0-f1;h0-m1-f1;h0-m2-f1;h1-m5-f1;h2-m3-f1;h2-m4-f1 : seek UP
//h0-m0-f2;h0-m1-f2;h0-m2-f2;h1-m5-f2;h2-m3-f2;h2-m4-f2 : seek DOWN

/*
  m_menu_state - Description - menu - func button
  0 - default home screen - audio - source,seekup/down
  1 - BT/USB audio album art screen - audio - back,seekup/down
  2 - BT/USB audio song list screen - audio - back,seekup/down
  3 - default setting screen - settings - source,seekup/down
  4 - Compass animation screen - settings - back,seekup/down
  5 - default phone screen - phone - source,seekup/down
  6 - contact/recentcall contact list screen - phone - back,text message,call
  7 - contact/recentcall msg list screen - phone - back,send message, call
  8 - incoming call screen - phone - decline, text message, answer
  9 - incoming call msg list screen - decline, send message, answer
  10 - call connected - phone - decline
  11 - sending msg - phone - NO FUNCTION BUTTION
  12 - volume adjust - audio/phone - volume adj slider
 */
signal sendButtonConfig(string msg)
signal sendDisableSliderCtrlObj()
signal sendImageToInformationPanel(string label, bool flag, string img)
signal sendPasswordIndex(int index)
signal sendScreenIDtoBackend(int screenID)
signal swapLayout()

Timer {
    id:incomingCallTimer; repeat: true; running: false; interval: 15000;
    onTriggered: p_incomingCallNotification = true;
}
Timer {
    id:msgTimer; repeat: false; running: m_menu_state == 11; interval: 1000;
    onTriggered: {m_func_scr_idx = 0;}
}
Timer {
    id:songsTimer; repeat: true; running: (m_play_songs && (m_menu_state < 8)); interval: 10000; triggeredOnStart: true;
    onTriggered: {//console.log("=====> Change song index :  @ : ",Qt.formatTime(new Date(), "hh:mm:ss"));
        if(m_song_index+1 >= m_nof_songs) m_song_index = 0;
        else m_song_index+=1;

        m_artAlbumName = "Album : " + m_songlist.get(m_song_index).album
        m_artHeadingTxt = m_songlist.get(m_song_index).name
        m_artArtistName = "Artist : " + m_songlist.get(m_song_index).artist
        m_artImg = "AlbumArt/" + m_songlist.get(m_song_index).art
    }
}


onM_home_scr_idxChanged: {
    if((m_home_scr_idx > -1) && (!p_incomingCallNotification)){
        console.log("ENTER : onM_home_scr_idxChanged : ",m_heading_txt,"Menu Screen : m_home_scr_idx : ",m_home_scr_idx, ", m_menu_state : ",m_menu_state)
        switch(m_home_scr_idx){
        case 1: m_menu_state = 5; break;
        default: m_menu_state = m_home_scr_idx ? 3 : 0;
        }
        //sendScreenIDtoBackend(m_screenID[m_home_scr_idx]);
        console.log("EXIT : onM_home_scr_idxChanged : ",m_heading_txt,"Menu Screen : m_home_scr_idx : ",m_home_scr_idx, ", m_menu_state : ",m_menu_state)
    }
}

onM_menu_scr_idxChanged: {
    if(m_menu_scr_idx > -1){
        console.log("ENTER : onM_menu_scr_idxChanged : ",m_heading_txt,"Menu Screen : m_home_scr_idx : ",m_home_scr_idx,",m_menu_scr_idx : ",m_menu_scr_idx, ", m_menu_state : ",m_menu_state)
        switch(m_home_scr_idx){
        case 1: m_menu_state = 6; m_phone_src = (m_menu_scr_idx == 1); break;
        case 2:
            if(m_menu_scr_idx == 0) m_menu_state = 4;
            else swapLayout();
            break;
        default: switch(m_menu_scr_idx){
            case 2: case 3: /*m_audio_src = (m_menu_scr_idx == 3);*/ m_menu_state = 1; break;
                    default: if(m_menu_state) { m_menu_state = 2; } else {m_play_songs=false;}break;
            }
            break;
        }

        //m_menu_scr_idx = -1;
        console.log("EXIT : onM_menu_scr_idxChanged : ",m_heading_txt,"Menu Screen : m_home_scr_idx : ",m_home_scr_idx,",m_menu_scr_idx : ",m_menu_scr_idx, ", m_menu_state : ",m_menu_state)
    }
}

onM_func_scr_idxChanged: {
    if(m_func_scr_idx > -1){
        console.log("ENTER : onM_func_scr_idxChanged : ",m_heading_txt,"Menu Screen : m_home_scr_idx : ",m_home_scr_idx,",m_func_scr_idx : ",m_func_scr_idx, ", m_menu_state : ",m_menu_state)
        //default actions
        //h0-m0-f0;h1-m5-f0;h2-m3-f0 : change source
        //h0-m1-f0;h0-m2-f0;h1-m6-f0;h1-m7-f0;h2-m4-f0 : go back
        //h0-m0-f1;h0-m1-f1;h0-m2-f1;h1-m5-f1;h2-m3-f1;h2-m4-f1 : seek UP
        //h0-m0-f2;h0-m1-f2;h0-m2-f2;h1-m5-f2;h2-m3-f2;h2-m4-f2 : seek DOWN

        if(m_menu_offset[m_home_scr_idx] === m_menu_state){
            switch(m_func_scr_idx){
            case 0: console.log("Change Audio Source here..."); break;
            case 1: console.log("Seek DOWN Audio Source here..."); break;
            case 2: console.log("Seek UP Audio Source here..."); break;
            }
        }else{
            switch(m_home_scr_idx){
            default:
                switch(m_func_scr_idx){
                case 1:/*if(check_seek())*/ console.log("Seek DOWN Audio Source here..."); break;
                case 2:/*if(check_seek())*/ console.log("Seek UP Audio Source here..."); break;
                default: --m_menu_state; m_play_songs = m_play_songs ? true : false;break;
                }
                break;
            case 1:
                console.log("Phone screen logic here...");
                switch(m_func_scr_idx){
                case 1:
                    if((m_menu_state === 6) || (m_menu_state === 8)) m_menu_state +=1;
                    else m_menu_state = 11;
                    break;
                case 2:
                    m_menu_state = 10;
                    break;
                default:
                    if(p_incomingCallNotification) {
                        m_menu_state = m_pmnu_state;
                        m_home_scr_idx = m_phme_scr_idx;
                        p_incomingCallNotification = false;
                    }
                    else if((m_menu_state === 10) || (m_menu_state === 11)) m_menu_state = 6;
                    else --m_menu_state;
                    break;
                }
                break;
            }
        }

        m_func_scr_idx = -1;
        console.log("EXIT : onM_func_scr_idxChanged : ",m_heading_txt,"Menu Screen : m_home_scr_idx : ",m_home_scr_idx,",m_func_scr_idx : ",m_func_scr_idx, ", m_menu_state : ",m_menu_state)
    }
}

onP_incomingCallNotificationChanged: {
    if(p_incomingCallNotification){

        m_pmnu_state = (m_menu_state == 10) ? 6 : m_menu_state;
        m_phme_scr_idx = m_home_scr_idx;
        m_menu_state = 8;
        m_home_scr_idx = 1;
    }
}

onP_sendConfigChanged: {
    if(p_sendConfig){
        sendConfigToBackEnd()
        p_sendConfig = false;
    }
}

onM_send_screen_idChanged : {
    if(m_send_screen_id > -1){
        switch(m_send_screen_id){
        case 0: sendScreenIDtoBackend(m_searchID); break;
        case 1: sendScreenIDtoBackend(m_listID); break;
        case 2: sendScreenIDtoBackend(m_freeID); break;
        default: sendScreenIDtoBackend(m_screenID[m_home_scr_idx]); break;
        }

        m_send_screen_id = -1;
    }
}

onM_play_songsChanged: {
    console.log("----> onM_play_songsChanged", m_play_songs);
}

onM_audio_srcChanged: {
    if(m_audio_src) m_song_index = m_usbsong_idx;
    else m_song_index = m_btsong_idx;}

onM_song_indexChanged: {
    if(m_audio_src) m_usbsong_idx = m_song_index;
    else m_btsong_idx = m_song_index;
}



Component.onCompleted: {
    console.log("Component.onCompleted from LayoutTemplate")
    m_menu_state = 0;
}

function sendConfigToBackEnd() {
    //console.log("Sending", p_tpSide , "Button Configuration To BackEnd...");
    if(topRect.visible){
        sendButtonConfig("Control,"+p_cur_screen_ID);
    }

    if(af_fun_butn.model){
        sendButtonConfig("Function,3");
    }
}

function recv_menu_butn_state(l_index, l_state){
    console.log( "LayoutTemplate : recv_menu_butn_state index : ",l_index, ",state : ",l_state, "STATE : ",state)
    if(l_index < (af_hme_butn.model+af_menu_butn.model)) {
        console.log("LayoutTemplate : recv_menu_butn_state : ",m_heading_txt,"Menu Screen : m_home_scr_idx : ",m_home_scr_idx,",m_menu_scr_idx : ",m_menu_scr_idx, ", m_menu_state : ",m_menu_state)
        if(l_index < af_hme_butn.model){af_hme_butn.itemAt(l_index).p_buttonState = l_state;}
        else {af_menu_butn.itemAt(l_index-af_hme_butn.model).p_buttonState = l_state;}}
}

function recv_func_butn_state(l_index, l_state){
    console.log( "LayoutTemplate : recv_func_butn_state index : ",l_index, ",state : ",l_state, "STATE : ",state)
    console.log("LayoutTemplate : recv_menu_butn_state : ",m_heading_txt,"Menu Screen : m_home_scr_idx : ",m_home_scr_idx,",m_menu_scr_idx : ",m_menu_scr_idx, ", m_menu_state : ",m_menu_state)
    switch(af_fun_butn.model) {
    case 1: af_fun_butn.itemAt(0).p_buttonState = l_state; break;
    case 3: af_fun_butn.itemAt(l_index).p_buttonState = l_state;break;
    default:break;
    }
}

states: [
    State {
        name: "audioScreen"
        when: ((afTemplate.m_menu_state === 0) && (m_home_scr_idx === 0))
        PropertyChanges { target: afTemplate; m_send_screen_id: 3; m_play_songs : m_play_songs ? true : false;}
    },
    State {
        name: "artScreen"
        when: ((afTemplate.m_menu_state === 1) && (m_home_scr_idx === 0))
        PropertyChanges { target: homeScreenContainer; visible: false; }
        PropertyChanges { target: artScreenContainer; visible: true; }
        PropertyChanges { target: listScreenContainer; visible: false; }
        PropertyChanges { target: topRect; color: "#000000"; }
        PropertyChanges { target: afTemplate; m_heading_txt: /*m_audio_src ? "USB Audio" : */"Bluetooth Audio"; /*m_send_screen_id: 3;*/ m_play_songs: true}
        PropertyChanges { target: artHeadingTxt; visible: true; }
        PropertyChanges { target: artAlbumName; visible: true; }
        PropertyChanges { target: artArtistName; visible: true; }
    },
    State {
        name: "songslistScreen"
        when: ((afTemplate.m_menu_state === 2) && (m_home_scr_idx === 0))
        PropertyChanges { target: homeScreenContainer; visible: false; }
        PropertyChanges { target: artScreenContainer; visible: false; }
        PropertyChanges { target: listScreenContainer; visible: true; }
        PropertyChanges { target: compassUi;visible: false;}
        PropertyChanges { target: topRect; color: "#000000"; }
        PropertyChanges { target: afTemplate; m_heading_txt: m_audio_src ? "USB Audio" : "Bluetooth Audio"; m_send_screen_id: 1; m_play_songs: true}
        PropertyChanges { target: listLayout; pObjName:m_songlist; p_listCount: m_songlist.count;}
    },
    State {
        name: "settingsScreen"
        when: ((afTemplate.m_menu_state === 3) && (m_home_scr_idx === 2))
        PropertyChanges { target: menuScreenGrid; spacing: 112; columns: 2; }
        PropertyChanges { target: bgImg; source: "pics/settings_panel_bg_img.png"; }
        PropertyChanges { target: afTemplate; m_heading_txt: "Settings"; m_send_screen_id: 3; m_play_songs: m_play_songs ? true : false;}

    },
    State {
        name: "compassScreen"
        when: ((afTemplate.m_menu_state === 4) && (m_home_scr_idx === 2))
        PropertyChanges { target: homeScreenContainer; visible: false; }
        PropertyChanges { target: artScreenContainer; visible: false; }
        PropertyChanges { target: listScreenContainer; visible: true;}
        PropertyChanges { target: compassUi;visible: true;}
        PropertyChanges { target: topRect; color: "#000000"; }
        PropertyChanges { target: afTemplate; m_heading_txt: "Compass"; m_send_screen_id: 2; m_play_songs: m_play_songs ? true : false;}
        PropertyChanges { target: artHeadingTxt; visible: false; }
        PropertyChanges { target: artAlbumName; visible: false; }
        PropertyChanges { target: artArtistName; visible: false; }
        PropertyChanges { target: artImg; anchors.leftMargin: 217; }
        PropertyChanges { target: listbgImg; source: "pics/settings_panel_bg_img.png"; }
    },
    State {
        name: "phoneScreen"
        when: ((afTemplate.m_menu_state === 5) && (m_home_scr_idx === 1))
        PropertyChanges { target: menuScreenGrid; spacing: 112; columns: 2; }
        PropertyChanges { target: bgImg; source: "pics/phone_panel_bg_img.png"; mirror: true}
        PropertyChanges { target: afTemplate; m_heading_txt: "Phone"; m_send_screen_id: 3; m_play_songs: m_play_songs ? true : false;}
    },
    State {
        name: "phonelistScreen"
        when: ((afTemplate.m_menu_state === 6) && (m_home_scr_idx === 1))
        PropertyChanges { target: homeScreenContainer; visible: false; }
        PropertyChanges { target: artScreenContainer; visible: false; }
        PropertyChanges { target: listScreenContainer; visible: true;}
        PropertyChanges { target: compassUi;visible: false;}
        PropertyChanges { target: topRect; color: "#000000"; }
        PropertyChanges { target: afTemplate; m_heading_txt: m_phone_src ? "Recent Calls" : "Contacts"; m_send_screen_id: 1; m_play_songs: m_play_songs ? true : false;}
        PropertyChanges { target: listLayout; p_showImg:m_phone_src; pObjName:m_contactlist; p_listCount:m_contactlist.count;}
        PropertyChanges { target: listbgImg; source: "pics/phone_panel_bg_img.png"; mirror: true}
    },
    State {
        name: "msglistScreen"
        when: (((afTemplate.m_menu_state === 7) || (afTemplate.m_menu_state === 9)) && (m_home_scr_idx === 1))
        PropertyChanges { target: homeScreenContainer; visible: false; }
        PropertyChanges { target: artScreenContainer; visible: false; }
        PropertyChanges { target: listScreenContainer; visible: true; }
        PropertyChanges { target: compassUi;visible: false;}
        PropertyChanges { target: topRect; color: "#000000"; }
        PropertyChanges { target: afTemplate; m_heading_txt: "Choose Message to Send"; m_send_screen_id: 1; m_play_songs: m_play_songs ? true : false;}
        PropertyChanges { target: listLayout; pObjName:m_msglist; p_listCount:m_msglist.count;}
        PropertyChanges { target: listbgImg; source: "pics/phone_panel_bg_img.png"; mirror: true}
    },
    State {
        name: "incomingCallAlertScreen"
        when: ((afTemplate.m_menu_state === 8) && (m_home_scr_idx === 1))
        PropertyChanges { target: homeScreenContainer; visible: false; }
        PropertyChanges { target: artScreenContainer; visible: true; }
        PropertyChanges { target: listScreenContainer; visible: false; }
        PropertyChanges { target: topRect; color: "#000000"; }
        PropertyChanges { target: afTemplate; m_heading_txt: "Incoming Call..."; m_send_screen_id: 2;m_play_songs: m_play_songs ? true : false;}
        PropertyChanges { target: artHeadingTxt; visible: true; }
        PropertyChanges { target: artAlbumName; visible: false; }
        PropertyChanges { target: artArtistName; visible: false; }
    },
    State {
        name: "callConnectedScreen"
        when: ((afTemplate.m_menu_state === 10) && (m_home_scr_idx === 1))
        PropertyChanges { target: homeScreenContainer; visible: false; }
        PropertyChanges { target: artScreenContainer; visible: true; }
        PropertyChanges { target: listScreenContainer; visible: false; }
        PropertyChanges { target: topRect; color: "#000000"; }
        PropertyChanges { target: afTemplate; m_heading_txt: "Active Call"; m_send_screen_id: 2;m_play_songs: m_play_songs ? true : false;}
        PropertyChanges { target: artHeadingTxt; visible: true; }
        PropertyChanges { target: artArtistName; visible: false; }
        PropertyChanges { target: artAlbumName; visible: false; }
    },
    State {
        name: "msgSendingScreen"
        when: ((afTemplate.m_menu_state === 11) && (m_home_scr_idx === 1))
        PropertyChanges { target: homeScreenContainer; visible: false; }
        PropertyChanges { target: artScreenContainer; visible: true; }
        PropertyChanges { target: listScreenContainer; visible: false; }
        PropertyChanges { target: topRect; color: "#000000"; }
        PropertyChanges { target: afTemplate; m_heading_txt: "Sending Message"; m_send_screen_id: 2;m_play_songs: m_play_songs ? true : false;}
        PropertyChanges { target: artHeadingTxt; visible: true; }
        PropertyChanges { target: artAlbumName; visible: false; }
        PropertyChanges { target: artArtistName; visible: false; }
        PropertyChanges { target: artHeadingTxt; anchors.verticalCenterOffset: 50; }
        PropertyChanges { target: artImg; anchors.verticalCenterOffset: 50; }
    }
]

transitions: [
    Transition { from: "*"; to: "artScreen"; onRunningChanged: {
         if(!running){
            m_send_screen_id = 3;
             console.log("--------------------------> Transition Completed ---------------->")
         }
        }
    }
]

}