summation of value in listview

gfxx

I get these list model ..

import QtQuick 2.0

ListModel {
    ListElement {
        number: "amber"
        events: "0"
        delayM: 0
    }
    ListElement {
        number: "john"
        events: "0"
        delayM: 0
    }
    ListElement {
        number: "karl"
        events: "4"
        delayM: 43
    }
    ListElement {
        number: "sara"
        events: "0"
        delayM: 0
    }
    ListElement {
        number: "maria"
        events: "2"
        delayM: 11
    }
}

for sure I get my list view .... but I need to do a sum with delayM value when I refresh my listview .... a pieces of my listview code:

        Row {
            id: rowList
            width: 960
            height: 200
            clip: true

            ListView {
                id: mylistView
                width: 310
                height: 180
                clip: true
                contentHeight: 180
                contentWidth: 320
                spacing: 10
                model: myListmodel {}
                delegate: Component {
                    Row {
                        spacing: 50
                        Column {
                            spacing: 5
                            Text {
                                text: number;
                                font.pointSize: 12
                                font.family: "Arial"
                                font.bold: true
                            }
                            Text {
                                horizontalAlignment: Text.AlignRight
                                text: {
                                    if(events === "0"){
                                        qsTr("all ok")
                                    }
                                    else{
                                        qsTr(events + " events")
                                    }
                                }
                                leftPadding: 20
                                font.italic: true
                                font.family: "Arial"
                                font.pointSize: 10
                            }
                            Text {
                                id: totMaterial
                                horizontalAlignment: Text.AlignRight
                                text: {
                                    if(delayM === 0){
                                        qsTr("   --")
                                    }
                                    else{
                                        qsTr(delayM + " min. ")
                                        //totRitMat = totRitMat + delayM /* error loop text*/
                                    }
                                }
                                leftPadding: 20
                                font.italic: true
                                font.pointSize: 10
                                font.family: "Arial"
                            }
                        }
                    }
                    //onCompleted: totRitMat = totRitMat + totMaterial /* these is wrong*/
                }

            }

is possible to do these?

regards

Shrinidhi Upadhyaya

Hi @gfxx ,

Please have a look at the sample code:-

 Row {
            id: rowList
        
            property int totalVal: 0
            [..]
            [..]

 Text {
          id: totMaterial
          horizontalAlignment: Text.AlignRight
          text: {
                        if(delayM === 0) {
                            qsTr("   --")
                        } else {
                             qsTr(delayM + " min. ") + 
                              (rowList.totalVal =  rowList.totalVal + delayM)
                         }
                     }
            [..]
            [..]

gfxx

@Shrinidhi-Upadhyaya i obtain these error: QML QQuickText: Binding loop detected for property "text"

but it make the summation.

Shrinidhi Upadhyaya

Hi @gfxx , iam sorry for that, did not see that

Here is the sample code:-

Text {
           id: totMaterial
                horizontalAlignment: Text.AlignRight

                text: delayM === 0
                          ? qsTr(" --")
                          : qsTr(delayM + " min. ") + rowList.totalVal
                                   
                 Component.onCompleted: {
                          rowList.totalVal =  rowList.totalVal + delayM
                  }
          }

I guess this will fix the Binding loop error.

gfxx

@Shrinidhi-Upadhyaya said in summation of value in listview:

Text {
id: totMaterial
horizontalAlignment: Text.AlignRight

            text: delayM === 0
                      ? qsTr(" --")
                      : qsTr(delayM + " min. ") + rowList.totalVal
                               
             Component.onCompleted: {
                      rowList.totalVal =  rowList.totalVal + delayM
              }
      }

Yes it fix ..... (with c++ or java style if statement) ... but my intention it is write the code in these manner:

Text {
           id: totMaterial
                horizontalAlignment: Text.AlignRight

                text: delayM === 0
                          ? qsTr(" --")
                          : qsTr(delayM + " min. ")   /* not here the summation + rowList.totalVal*/
                                   
                 Component.onCompleted: {
                          rowList.totalVal =  rowList.totalVal + delayM
                          console.log("my first add value: " + rowList.totalVal ) /* I think is possible to see all value .... but I see only the first NON zero ... all other I not can see ... so if I would to show the summation in other place I can't  :( */
                  }
          }

gfxx

@gfxx OK OK i see .... if scroll the listView appear the other value .....

So the right question is How to iterate trought the listwies for to have the summation of delayM value??

(sorry for the bad english ...)

Shrinidhi Upadhyaya

Hi @gfxx , do you mean to tell you want to access the value of delayM at a particular index or something?

Here is the sample code for that:-

 Component.onCompleted: {
                        for(var i=0;i<dummyModel.count;i++) {
                            console.log("Index:",i)
                            console.log("Value:",dummyModel.get(i).delayM)
                        }
                    }