SystemInfo QML Plugin

BatteryInfo

The BatteryInfo element contains a set of functions and properties for interrogating and handling notifications of battery information. We will use the battery example, battery2.qml, to show how to use the element and the plugin.

The following QML code enables a number of events and defines several handlers.

     BatteryInfo {
         id: batinfo;

         property int battlevel: remainingCapacityPercent;
         property string oldstate;

         monitorChargerTypeChanges: true
         monitorChargingStateChanges: true
         monitorBatteryStatusChanges: true
         monitorRemainingCapacityPercentChanges: true
         monitorRemainingCapacityChanges: true
         monitorRemainingChargingTimeChanges: true
         monitorCurrentFlowChanges: true

         onChargerTypeChanged:  {
         ...

In particular, when the battery level changes the handler

         onRemainingCapacityPercentChanged: doBatteryLevelChange(level)

calls

     function doBatteryLevelChange(level) {
         leveltext.text = "Level: "+ level +"%"
         floorParticles.burst(level);
         batlevel = level;
         batinfo.oldstate = img.state;
         img.state = "levelchange"
         //img.state = batinfo.oldstate;
         getPowerState();
     }

which results in a change of State to levelchange being handled after the function. The levelchange state then causes a suitable animation to run and display the new level.

         State {
             name: "levelchange"
             ...
             PropertyChanges {
                 target: bubblebounceanim
                 from: screen.height
                 to: screen.height - (screen.height * (batlevel / 100 ))
             }
             ...

     Item {
         id: wlan
         ...
         property int mode: NetworkInfo.WlanMode;
         ...
         NetworkInfo {
             id: wlaninfo
             mode: wlan.mode;
             property string img : getImage(networkStatus);

             function getImage(newStatus) {
                 if(newStatus == "Connected") {
                     return "images/wlan.svg";
                 }
                 return "images/wlan-noavail.svg";
             }

             onStatusChanged : {
                 img = getImage(newStatus)
             }
             monitorNameChanges: true;
             monitorSignalStrengthChanges: true
             monitorStatusChanges: true
             monitorModeChanges: true
         }