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QML: Wait for the animation to finish

I am trying to make the visible animation consistent. I have a javascript function that calls myModel.move () two times. I have a GridView to show myModel, and I have a Behavior on x animation, so I can visually see the movements. But both motion animators work in parallel (a slight delay between them is not noticeable).

My idea was to add a counter of how many animations were running and how many of them were already completed. Something like that;

Behavior on x {
    NumberAnimation {
        id: animationX;
        duration: 500;
        onRunningChanged: {
            if (animationX.running) {
                console.log("Animation start");
                myModel.busy = myModel.busy + 1
            } else {
                console.log("Animation stop");
                myModel.busy = myModel.busy - 1
            }
        }
    }
}

This works as expected. Then I add a loop to my javascript function to wait for all animations to complete.

ListModel {
    id: myModel
    property int busy: 0
    function doSomething() {
        myModel.move(...)
        while (myModel.busy) {}
        myModel.move(...)
    }
}

. , () , . - . ?

+5
2
function doSomething() {
    myModel.move(...)
    while (myModel.busy) {}
    myModel.move(...)
}

javascript. ? 2 .

  • myModel.move(), (, , )
  • , . Onclick.

, onRunningChanged - . , onModelIdle

...
   onRunningChanged: {
        if (animationX.running) {
            console.log("Animation start");
            myModel.busy = myModel.busy + 1
        } else {
            console.log("Animation stop");
            myModel.busy = myModel.busy - 1
            if(myModel.busy == 0)
              // don't know the code, but trigger the onModelIdle event which 
              // be handled below
        }
    }
...

ListModel {
   id: myModel
   ...

   onModelIdle{
       myModel.move(...)
   }
}
+2

, #UmNyobe. , QML , , . . , - ( ) QML, .

import QtQuick 1.1
GridView {
    id: mainGrid
    cellWidth: 165; cellHeight: 95
    width: 5*cellWidth; height: 4*cellHeight
    model: myModel
    delegate: myButton
    property string animate: "no"
    property int busy: 0
    signal busyPlus
    signal busyMinus
    onBusyPlus: {
        busy++
    }
    onBusyMinus: {
        busy--
        if (busy == 0) mainGrid.model.algorithm()
    }
    ListModel {
        id: myModel
        property int step: 0
        property int one: 0
        function createModel() {
            for (var i=1; i<=20; i++) {
                append({"display": i})
            }
        }
        function algorithm() {
            if (step == 0) {
                move(0,19,1)
                one = 0
                step++
            }
            else if (step == 1) {
                if (one < 19) {
                    move(one,one+1,1)
                    one++
                    if (one == 19) step++
                }
            }
            else if (step == 2) {
                move(0,1,1)
                move(5,6,1)
                move(10,11,1)
                move(15,16,1)
                step++
            }
        }
        Component.onCompleted: {
            createModel()
            mainGrid.animate = "yes"
            algorithm()
        }
    }
    Component {
        id: myButton
        Item {
            id: item
            width: mainGrid.cellWidth-5; height: mainGrid.cellHeight-5;
            Rectangle {
                id: box
                parent: mainGrid
                x: item.x; y: item.y;
                width: item.width; height: item.height;
                border.width: 1
                Text {
                    anchors.centerIn: parent
                    text: display
                    font.pixelSize: 48
                }
                Behavior on x {
                    enabled: mainGrid.animate == "yes"
                    NumberAnimation {
                        id: animationX;
                        duration: 1000;
                        onRunningChanged: {
                            if (animationX.running) mainGrid.busyPlus()
                            else mainGrid.busyMinus()
                        }
                    }
                }
                Behavior on y {
                    enabled: mainGrid.animate == "yes"
                    NumberAnimation {
                        id: animationY;
                        duration: 1000;
                        onRunningChanged: {
                            if (animationY.running) mainGrid.busyPlus()
                            else mainGrid.busyMinus()
                        }
                    }
                }
            }
        }
    }
}
+1

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