[Mathias]

Hi

I have been looking trough the documentation for a way to detect if the application is active running or if it is in the background. For example I would like to pause the game and stop the music when the player switches to an other application or puts the game in the background. I know that on Meego Harmattan this could be handled using the platformWindow element. Does v-play provide any equivalent? How is it working on Android and iOS?

Thanx.

Mathias

P.S. It would be cool if you could add a search here in the forums to more easily browse trough previous forum topics. 🙂

 

 

[AlexFelgo Team]

Hi Mathias,

the application state is handled transparently in Felgo, so if an app on Android or iOS gets into background all sounds, animations, timers and so on (so the entire game loop too) get paused and resumed as soon as the app is active again.

Is this behavior sufficient for your game or are you looking for additional signals getting emitted when an app changes its state?

Thanks,

Alex

 

ps: Thanks for your forum input, we are working on that! 😉

[Martin]

Hey,

I am also somewhat uncertain about the consistent handling of back/home button presses and application switching (e.g. by incoming calls or otherwise) on the different supported platforms. It would be great if you could provide a little tutorial and preferably (and maybe more importantly) also include this in a qtcreator template. I know that it can probably be figured out from some of the demos but it definitely does make sense to include it in a standard template.

 

Cheers,

Martin

[ChristianFelgo Team]

Hi, yes we will add a template that shows this functionality! Thanks a lot for your input!

Cheers, Chris

[Mathias]

Thanx for the reply. For my current project i think it will be enough to stop all animations, sounds, timers etc.

– Mathias

[Nour]

hello

 

my game rejected because back button doesn’t close the game and sometimes music doesn’t stop when lock the device

Music scenario

1. Execute the application
2. Press HOLD key > Release hold mode > Release lock-screen
3. Check the Sound

is there any solution for this?

 

Thanks

[AlexFelgo Team]

Hi,

did you implement closing the game like it’s described in this tutorial?
http://felgo.com/doc/howto-multi-scene-multi-level.html#android-hardware-back-button
http://felgo.com/doc/howto-multi-scene-multi-level.html#close-the-game

Regarding the sound/music problem:
Is it the background music or a long lasting sound that keeps playing when entering the lock screen in your case? For the latter issue, we had a fix in the latest daily build.

Cheers,
Alex

[David]

Hi maysalward,

We already fixed the music problem and it is available on the buildserver! Just rebuild your application and it should work fine!

Cheers,

David

[magicsquare15]

Hi Mathias,

 

I would also like to be able to “pause” the game.  Actually, I would also like to be able to slow down or speed up time as well, as done in the Android game Xelorians, if anyone here has played this.  Has anyone figured out a way to change what the world’s update time step is?

 

Thanks,

Aaron

[AlexFelgo Team]

Hi Aaron,

to pause your game (the physics part) you can simply set the “running” property of your PhysicsWorld to false.

I will have a look if i find an easy way to slow down time.

Cheers,
Alex

[AlexFelgo Team]

Regarding slowing down time:

We will add the possibility to change the timeStep property of the PhysicsWorld to achieve the effect of slowing down or even speeding up time, to our next daily build. As soon as it’s available, i will post some demo source code here!

Cheers,
Alex

[AlexFelgo Team]

In our next daily build we will introduce a new property to the PhysicsWorld, called timeScale. This will allow you to slow down and speed up time of the physics world.
Here is some demo source code, showing how you will be able to use the property. Stay tuned!

import VPlay 1.0
import Box2D 1.0
import QtQuick 1.1

GameWindow {
  id: window
  width: 960
  height: 640

  EntityManager {
    id: entityManager
  }

  Scene {
    id: scene
    width: 960
    height: 640
    Column {
      SimpleButton {
        text: world.running === true ? "pause" : "resume"
        onClicked: {
          world.running = !world.running
        }
      }
      SimpleButton {
        text: "normal"
        onClicked: {
          world.timeScale = 1
        }
      }
      SimpleButton {
        text: "slower"
        onClicked: {
          world.timeScale = 0.2
        }
      }
      SimpleButton {
        text: "faster"
        onClicked: {
          world.timeScale = 2
        }
      }
    }

    PhysicsWorld {
      id: world
      gravity.y: -10
      updatesPerSecondForPhysics: 60
      // you can fade changes of timeScale smoothly to achieve an even nicer effect
      Behavior on timeScale {
        NumberAnimation { duration: 500 }
      }
    }

    EntityBase {
      width: parent.width
      height: 20
      anchors.bottom: parent.bottom
      BoxCollider {
        anchors.fill: parent
        bodyType: Body.Static
        categories: Box.Category1
        Rectangle {
          color: "green"
          anchors.fill: parent
        }
      }
    }

    Repeater {
      model: 100
      EntityBase {
        id: entity
        x: 40 + Math.random()*800
        y: 200 + Math.random()*150
        width: 20
        height: 20
        BoxCollider {
          anchors.fill: parent
          friction: 0
          restitution: 1
          categories: Box.Category2
          collidesWith: Box.Category1
          Rectangle {
            color: "red"
            anchors.fill: parent
          }
        }
      }
    }
  }
}

Cheers,
Alex

[Raimonds]

Alex said:

Hi Mathias,

the application state is handled transparently in Felgo, so if an app on Android or iOS gets into background all sounds, animations, timers and so on (so the entire game loop too) get paused and resumed as soon as the app is active again.

Is this behavior sufficient for your game or are you looking for additional signals getting emitted when an app changes its state?

Thanks,

Alex

Hi Alex!

I’m searching for application state change event too… if i’m playing game and application goes in background, when someone calls etc.. Everything works fine – sounds and timers are stopped. But when application gets focused again – it automatically starts all events and timers. I wanted to show “Resume” button (show Paused state scene), when app is back on screen…

 

Best Regards,

Raimonds

[AlexFelgo Team]

Hey Raimonds,

as your already stated Felgo games currently auto-start after the app goes to foreground again. If the described behavior is a requirement for one of your games please add this feature to our roadmap thread so our engineers can prioritize it higher in our next feature discussions.

Thanks,
Alex

[ChristianFelgo Team]

Hi Raimonds,

there are 2 functions that are currently not documented, but which you can use to pause and resume your game manually. You can have a look in the Squaby demo or wizard in the SquabyScene.qml and search for system.resumeGameForObject() and system.pauseGameForObject().

What these functions do, they pause and resume all Timers and animations for the children objects of the item you provide them as a parameter. You can try to click the menu button in a Squaby game, and you will see the level creation and entity movement is paused. So you could trigger a call of pauseGameForObject() when the onApplicationPaused() signal handler is called in GameWindow, and resumeGameForObject() NOT in resume, but when you press your resume button in the game.

Cheers, Chris