positioners-attachedproperties.qml Example File | Qt Quick 5.12.11

- Qt 5.12
- Qt Quick
- Qt Quick Examples - Positioners
- positioners-attachedproperties.qml Example File
- Qt 5.12.11 Reference Documentation

# positioners-attachedproperties.qml Example File

positioners/positioners-attachedproperties.qml

     /****************************************************************************
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     ** This file is part of the examples of the Qt Toolkit.
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     import QtQuick 2.0
     import QtQuick.Controls 1.1

     Rectangle {
         id: page

         property real ratio: width / 320 < height / 440 ? width / 320 : height / 440
         property int elementSpacing: 6.3 * ratio

         width: 320
         height: 440

         Button {
           anchors.top: parent.top
           anchors.right: parent.right
           anchors.margins: 10
           text: hidingRect.visible ? "Hide" : "Show"
           onClicked: hidingRect.visible = !hidingRect.visible
         }

         // Create column with four rectangles, the fourth one is hidden
         Column {
             id: column

             anchors.top: parent.top
             anchors.left: parent.left
             anchors.leftMargin: page.width / 32
             anchors.topMargin: page.height / 48
             spacing: page.elementSpacing

             Rectangle {
                 id: green
                 color: "#80c342"
                 width: 100 * page.ratio
                 height: 100 * page.ratio

                 Text {
                   anchors.left: parent.right
                   anchors.leftMargin: 20
                   anchors.verticalCenter: parent.verticalCenter
                   text: "Index: " + parent.Positioner.index
                   + (parent.Positioner.isFirstItem ? " (First)" : "")
                   + (parent.Positioner.isLastItem ? " (Last)" : "")
                 }

                 // When mouse is clicked, display the values of the positioner
                 MouseArea {
                 anchors.fill: parent
                 onClicked: column.showInfo(green.Positioner)
                 }
             }

             Rectangle {
                 id: blue
                 color: "#14aaff"
                 width: 100 * page.ratio
                 height: 100 * page.ratio

                 Text {
                   anchors.left: parent.right
                   anchors.leftMargin: 20
                   anchors.verticalCenter: parent.verticalCenter
                   text: "Index: " + parent.Positioner.index
                   + (parent.Positioner.isFirstItem ? " (First)" : "")
                   + (parent.Positioner.isLastItem ? " (Last)" : "")
                 }

                 // When mouse is clicked, display the values of the positioner
                 MouseArea {
                 anchors.fill: parent
                 onClicked: column.showInfo(blue.Positioner)
                 }
             }

             Rectangle {
                 id: purple
                 color: "#6400aa"
                 width: 100 * page.ratio
                 height: 100 * page.ratio

                 Text {
                   anchors.left: parent.right
                   anchors.leftMargin: 20
                   anchors.verticalCenter: parent.verticalCenter
                   text: "Index: " + parent.Positioner.index
                   + (parent.Positioner.isFirstItem ? " (First)" : "")
                   + (parent.Positioner.isLastItem ? " (Last)" : "")
                 }

                 // When mouse is clicked, display the values of the positioner
                 MouseArea {
                 anchors.fill: parent
                 onClicked: column.showInfo(purple.Positioner)
                 }
             }

             // This rectangle is not visible, so it doesn't have a positioner value
             Rectangle {
                 id: hidingRect
                 color: "#006325"
                 width: 100 * page.ratio
                 height: 100 * page.ratio
                 visible: false

                 Text {
                     anchors.left: parent.right
                     anchors.leftMargin: 20
                     anchors.verticalCenter: parent.verticalCenter
                     text: "Index: " + parent.Positioner.index
                     + (parent.Positioner.isFirstItem ? " (First)" : "")
                     + (parent.Positioner.isLastItem ? " (Last)" : "")
                 }
             }

             // Print the index of the child item in the positioner and convenience
             // properties showing if it's the first or last item.
             function showInfo(positioner) {
                 console.log("Item Index = " + positioner.index)
                 console.log("  isFirstItem = " + positioner.isFirstItem)
                 console.log("  isLastItem = " + positioner.isLastItem)
             }
         }
     }