V-Play Engine Documentation

V-Play Gaming Components provide a specialized set of QML components for building 2D games on top of Qt 5 for multiple platforms, with the same source code. They are part of the V-Play SDK.

Supported Platforms

Mobile iOS Version 6.0 and above / iPhone 3GS, iPad, iPod touch 3rd Gen or newer (armv7, armv7s and arm64 architectures) and Simulators
Android Version 4.1 ("Jelly Bean") and above (armv7a and x86 architectures)
Phone / RT Devices running Windows RT 8.1 and Windows Phone 8.1 or later
Desktop macOS 64-bit Apple macOS 10.12 and Mac OS X 10.8 or later
Windows 32- or 64-bit Microsoft Windows 7 or later
Linux 64-bit Linux Ubuntu 14.04 or later, OpenSuse 13.1
Embedded Raspberry Pi and iMX6 (contact us for more information about these platforms)

QML Introduction

QML stands for "Qt Markup Language" and is a declarative language designed to describe the user interface of a program: both what it looks like, and how it behaves. In QML, a user interface is specified as a tree of objects with properties. This tree is also often referred to as Scene Graph, because when the parent item moves all children will follow. JavaScript is used as a scripting language in QML. In this section we will cover the basics of QML and its advantages by an example.

As code speaks more than 1000 words, here is a QML example implementing the following:

  • Displays a white background Rectangle with 800x600 px
  • Adds a grey button element which changes the color from grey to blue while pressed
  • The button is draggable
  • The button tracks the number of presses and displays it in its text element
  • The button gets invisible after it got pressed 10 times.

How many lines of code would it take you to develop this application with the same functionality in another programming language? With QML, it is just 30 lines, excluding the comments and empty lines:

 import QtQuick 2.0 // for accessing all QML elements like Rectangle, Text or MouseArea
 import VPlay 2.0 // for accessing all V-Play elements like GameWindow

 GameWindow {

   Rectangle {
     // background rectangle filling whole screen with black color
     color: "#000000" // black color, open up color picker with Ctrl+Alt+Space
     anchors.fill: parent // make as big as parent GameWindow
   }

   Scene {

     Rectangle {
       id: button
       color: mouseArea.pressed ? "blue" : "lightgrey" // make the button blue when pressed
       x: 100
       y: 50
       width: 100
       height: 40
       visible: pressCount < 10 // after the button being pressed more than 10 times, it gets invisible

       property int pressCount: 0 // initialize with 0, increase in onPressed

       Text {
         text: "Pressed " + button.pressCount + " times" // this will automatically update when pressCount changes
         color: "black"
         anchors.centerIn: parent
       }

       MouseArea {
         id: mouseArea
         anchors.fill: parent // make the touchable area as big as the button
         drag.target: button // this forwards the dragging to the button

         onPressed: {
             button.pressCount++ // increase pressCount property by 1 each time the button is pressed
         }
       }
     }
   }// Scene
 }// GameWindow

V-Play Sample Launcher Application

The V-Play Sample Launcher allows you to quickly test and run all the open-source examples and demo games available with the V-Play SDK, from a single desktop application.

V-Play Benefits for Qt 5 Developers

V-Play, a Qt Technology Partner of The Qt Company, enhances the Qt 5 framework with many components and its gaming API used in hundreds of games.

Existing Qt 5 games can benefit from this gaming API and V-Play plugins, because they work as an extension of the Qt framework and work together with existing projects. As a Qt developer, you get the following benefits by using V-Play:

And of course as part of V-Play you can use leading Qt plugins that enable you to:

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I want to make Games
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Game Development
Cross-Platform, Any Resolution

Use one IDE to deploy to all supported platforms, including iOS and Android, from a single code base.

Support all screen resolutions, aspect ratios and sizes with auto-adapting UI elements, smart scene scaling and memory efficient asset selection.

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V-Play ranked #1 at research2guidance cross-platform tool benchmarking 2014 by 2188 developers comparing 40 leading tools.

Multiplayer

V-Play Multiplayer supports both real-time and turn-based gameplay, so you can use it to make many different types of cross-platform multiplayer games. It's perfect for making player-vs-player games like 'Words with Friends' or games for a large amount of players, such as 'Clash of Clans'.

Learn More Video

Highscores & Achievements

The V-Play Game Network is a cross-platform gaming service that allows players around the world to compare game highscores and achievements. Players can also challenge each other across multiple platforms and share their progress on Facebook.

Learn More

QML & JavaScript

Qt Meta Language is a highly intuitive reactive language, which is super easy to learn, yet it's extremely powerful and flexible. Mix it with JavaScript to create awesome stuff, with just a few lines of code.

import QtQuick 2.0
import VPlay 2.0

GameWindow {
  Scene {
    
    SimpleButton {
      anchors.centerIn: parent
      text: "Press Me"
      onClicked: {
        console.debug("Wow you pressed me!")
      }
    }
  }
}

Learn More

Monetize & Analyze

With V-Play, you can use many 3rd party services for ads, in-app purchases, analytics and more, with just a few lines of code. All of these plugins work cross-platform, which allows you to maintain a single code base.

Learn More

Level Editor

The LevelEditor can be used during development to create and modify levels for your game, which you can then bundle in your final publishing build. Additionally, you can also integrate the in-game level editor to your published game and let your gamers create new levels.

Learn More Video

Card Game like UNO, Hearthstone or Poker

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/OneCard/OneCard.pro

Match-3 like Candy Crush Saga

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/JuicySquash/JuicySquash.pro

<Path to V-PlaySDK>/Examples/V-Play/demos/JuicySquashAdvanced/JuicySquashAdvanced.pro

Puzzle like 2048 or Threes!

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/2048/2048.pro

Casino like Big Win Slots

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/FlaskOfRum/FlaskOfRum.pro

Side Scroller like Jetpack Joyride or Flappy Bird

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/FlappyBird/FlappyBird.pro

Tower Defense like Castle Defense or Bloons TD

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/Squaby/Squaby.pro

Falldown & Jump like Doodle Jump or Mega Jump

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/ChickenOutbreak/ChickenOutbreak.pro

<Path to V-PlaySDK>/Examples/V-Play/demos/ChickenOutbreak2/ChickenOutbreak2.pro

<Path to V-PlaySDK>/Examples/V-Play/demos/DoodleJump/DoodleJump.pro

Platformer like Super Mario or Lep's World

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/Platformer/Platformer.pro

<Path to V-PlaySDK>/Examples/V-Play/demos/PlatformerWithLevelEditor/PlatformerWithLevelEditor.pro

Action like Angry Birds, Fruit Ninja, Cut the Rope

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/StackTheBoxWithCommunityEditor/StackTheBoxWithCommunityEditor.pro

<Path to V-PlaySDK>/Examples/V-Play/demos/BalloonPop/BalloonPop.pro

<Path to V-PlaySDK>/Examples/V-Play/demos/CarChallenge/CarChallenge.pro

Arcade like Arkanoid or Space Invaders

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/demos/ZombieBreak/ZombieBreak.pro

Community like Super Mario Maker or Minecraft

We got a demo game for you!

The V-Play SDK includes an open-source demo for this game genre. You can use its source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/examples/Squaby/Squaby.pro

<Path to V-PlaySDK>/Examples/V-Play/demos/StackTheBoxWithCommunityEditor/StackTheBoxWithCommunityEditor.pro

<Path to V-PlaySDK>/Examples/V-Play/demos/PlatformerWithLevelEditor/PlatformerWithLevelEditor.pro

Any other Idea? let us know how we can help you

You are looking for another demo?

The V-Play SDK includes many open-source demos for different game genres. You can use their source code and build your game in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

If you do not find your game genre in this list and wonder if V-Play is the right choice, just contact us, we are happy to help!

Contact Us

App Development
Better Apps, Less Effort

Develop feature-rich, cross-platform mobile apps from a single code base.

V-Play apps look, feel and perform exactly like native iOS, Android and Desktop apps. With less code & much faster development time.

Learn More Highlights Video

V-Play ranked #1 at research2guidance cross-platform tool benchmarking 2014 by 2188 developers comparing 40 leading tools.

Save Time, Code & Money

Save up to 90% source code with V-Play, compared to frameworks like Xamarin, Titanium, React Native and others.

Learn More

QML & JavaScript

Qt Meta Language is a highly intuitive reactive language, which is super easy to learn, yet it's extremely powerful and flexible. Mix it with JavaScript to create awesome stuff, with just a few lines of code. QML also allows you to easily create smooth and complex animations.

import QtQuick 2.0
import VPlayApps 2.0

App {
  Page {
    
    AppButton {
      anchors.centerIn: parent
      text: "Press Me"
      onClicked: {
        console.debug("Wow you pressed me!")
      }
    }
  }
}

Learn More

Monetize & Analyze

With V-Play, you can use many 3rd party services for ads, in-app purchases, analytics and more, with just a few lines of code. All of these plugins work cross-platform, which allows you to maintain a single code base.

Learn More

Native Sensors & More

V-Play Apps harness the power of Qt, the leading cross-platform development framework used by over 1,000,000 developers.

This gives your access to native device features like sensors, camera, file system as well as multimedia, networking, localization and much more.

Learn More

Responsive Design

V-Play has built in responsive design capabilities, you can target phones and tablets with the same source code.

Learn More

Highly Extensible

You have existing JavaScript, C++ or native code? You want to add any 3rd party SDK that we do not offer already?

No worries, you can add any JS, C++, Java or Objective-C code to your project.

Learn More

Component Showcase App shows the most important V-Play features and components

We got a demo app for you!

The V-Play SDK includes an open-source demo for this app type. You can use its source code and build your app in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/appdemos/showcase/Showcase.pro

Qt World Summit Conference App a full-featured conference management app made by V-Play

We got a demo app for you!

The V-Play SDK includes an open-source demo for this app type. You can use its source code and build your app in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/appdemos/qtws2016/QtWS2016.pro

Twitter App how to build layouts like in the official Twitter app for iOS and Android

We got a demo app for you!

The V-Play SDK includes an open-source demo for this app type. You can use its source code and build your app in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/appdemos/twitter/Twitter.pro

Maps App displays free bikes or boxes at bike stations for Vienna's bike sharing service Citybike Wien

We got a demo app for you!

The V-Play SDK includes an open-source demo for this app type. You can use its source code and build your app in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/appdemos/maps/Maps.pro

Messaging App demonstrates how to create the UI of a Facebook Messenger like app

We got a demo app for you!

The V-Play SDK includes an open-source demo for this app type. You can use its source code and build your app in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/appdemos/messaging/Messaging.pro

Weather App how to include powerful animations into your user interface

We got a demo app for you!

The V-Play SDK includes an open-source demo for this app type. You can use its source code and build your app in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play.

<Path to V-PlaySDK>/Examples/V-Play/appdemos/waether/Weather.pro

Any other Idea? let us know how we can help you

You are looking for another app demo?

The V-Play SDK includes many open-source demos for different app types. You can use their source code and build your app in record time. After installing V-Play, you can simply open the .pro file with Qt Creator, the development environment used for V-Play..

If you do not find your app type in this list and wonder if V-Play is the right choice, just contact us, we are happy to help!

Contact Us