FpsDisplay.qml Example File | Qt Canvas 3D (deprecated) 5.12.8

- Qt 5.12
- Qt Canvas 3D (deprecated)
- Planets Example
- FpsDisplay.qml Example File
- Qt 5.12.8 Reference Documentation

# FpsDisplay.qml Example File

threejs/planets/FpsDisplay.qml

     /****************************************************************************
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     import QtQuick 2.0

     Item {
         id: fpsDisplayControl
         property bool hidden: true
         property real fps: 0.0

         onHiddenChanged: {
             if (fpsDisplayControl.hidden)
                 fpsDisplay.color = "transparent";
             else
                 fpsDisplay.color = "#000000FF";
         }

         onFpsChanged: {
             fpsDisplay.updateFps();
         }

         Rectangle {
             anchors.fill: parent
             id: fpsDisplay
             color: "transparent"

             property real maxFps: 60.0
             property color maxFpsColor: "#00FF00"
             property color minFpsColor: "#FF0000"

             function updateFps() {
                 var scale = (fps > maxFps)?1.0:(fps/maxFps);
                 var r = (1 - scale) * minFpsColor.r + scale * maxFpsColor.r;
                 var g = (1 - scale) * minFpsColor.g + scale * maxFpsColor.g;
                 var b = (1 - scale) * minFpsColor.b + scale * maxFpsColor.b;
                 var a = (1 - scale) * minFpsColor.a + scale * maxFpsColor.a;
                 fpsCauge.height = scale * fpsDisplay.height;
                 fpsCauge.color = Qt.rgba(r,g,b,a);
             }

             Rectangle {
                 id: fpsCauge
                 width: parent.width
                 anchors.bottom: parent.bottom
                 visible: !fpsDisplayControl.hidden
             }

             Text {
                 id: fpsText
                 text: ""+(fps | 0)
                 font.family: "Helvetica"
                 font.pixelSize: 16
                 font.weight: Font.Light
                 color: "white"
                 anchors.fill: parent
                 verticalAlignment: Text.AlignVCenter
                 horizontalAlignment: Text.AlignHCenter
                 visible: !fpsDisplayControl.hidden
             }
         }
         MouseArea {
             anchors.fill: parent
             onClicked: {
                 fpsDisplayControl.hidden = !fpsDisplayControl.hidden;
             }
         }
     }