bada hello everybody

8/4/2019 Bada Hello Everybody

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Hello everybody!

Today a friend of mine started experimenting with one of the latest versions of badas SDK and IDE.

Samsung shortly will release the SDK/IDE for public use. The versions he has, though, may differ slightly

to those released at a later date, therefore it is thinkable that you might encounter slight inconsistencies.

The idea was to go somewhat beyond a simple hello world app and test badas IDE as well as its GUI

building tool. We want to create a simple greeting app that asks your name and responds with a simple

greeting. Something that looks like this:

Having installed the SDK/IDE and after re-starting the computer we start with an empty workspace in the

IDE


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Go to File->New->Bada Application Project, this will open a wizard. Type SimpleGreeting for the

projects name and select bada Application as the projects type. The wizard will create a new project for

you.


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For now we only need to open the files SimpleGreeting.cpp and SimpleGreeting.h that hold the

definitions and declarations for the bare-bone sample project. Next let us create a form for the app. In the

resource window (left bottom corner on the screenshot), right click Form->Insert Resource.

This will create a new emtpy form and open the GUI editor.


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Here we need to add three controls to the form: an input box, a button and a label. We start with the input

box by clicking on Edit Field in the Palette and dragging a box at the top of the empty form.

Double click the edit field and youll see the properties tab coming to front underneath. There change the id

to NAME_FIELD. Next draw a button below the edit field and a label below the button. In the same

way change the id of the button to HELLO_BUTTON and the id of the label to

GREETING_LABEL. Besides, in the properties of the button, for the text property insert something

meaningful like Say Hello! . Now we are ready with the form!


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Lets go to the SimpleGreeting.h header file. Here you will have to do a few things. First, lets define a

constant that we will use afterwards to identify the action event of the button. Do it right after the using-

statements of all the bada namespaces.

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usingnamespaceOsp::App;

usingnamespaceOsp::Base;

usingnamespaceOsp::Graphics;

usingnamespaceOsp::Io;

usingnamespaceOsp::Locales;

usingnamespaceOsp::System;

usingnamespaceOsp::Text;

usingnamespaceOsp::Ui;

usingnamespaceOsp::Ui::Controls;

staticconstintBUTTON_ACTION_GREET = 1;

Then, since c++ allows us multiple inheritance and we want to keep things simple and straight forward, let

us implement the IActionEventListener directly with our applications class. This will allow our app class

to take care of the events all by itself without the need to provide a separate listener (we are lazy today

). Further let us define a few private variables for the controls we use, so that we can reference them later in

our code.?

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/**

* [SimpleGreeting] application must inherit from Application class

* which provides basic features necessary to define an application.

*/


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classSimpleGreeting :

publicApplication, publicIActionEventListener

{

private:

Frame *pFrame;

Form *pForm;

Button *pButton;

Label *pLabel;

EditField *pField;

Finally declare a handler function at the end that will handle the action events later:

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/**

* Called when the battery level changes.

*/

voidOnBatteryLevelChanged(BatteryLevel batteryLevel);

/**

* Called on Actions

*/

virtualvoidOnActionPerformed(constOsp::Ui::Control& source, intactionId);

};

#endif

Well We are ready with the header file. Lets switch to the SimpleGreeting.cpp . Here we need to bind

the variables for controls we declared earlier in the header to the actual objects we designed in the GUI

editor + the object for the apps frame (look into the tutorials for UI: each app has a single frame which

holds all forms and controls and stuff within it). Lets put it all into the OnAppInitializing function.

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bool

SimpleGreeting::OnAppInitializing(AppRegistry& appRegistry)

{

// get the frame of the app


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pFrame = GetAppFrame()->GetFrame();

// bind pForm to the Form we designed in resources

pForm = newForm();

pForm->Construct("IDF_FORM1");

// add the form as child to the app's frame and set it as current

pFrame->AddControl(*pForm);

pFrame->SetCurrentForm(*pForm);

// bind name input field

pField = (EditField*)pForm->GetControl("NAME_FIELD", true);

pField->SetText("Your name in here!");

// bind label

pLabel = (Label*)pForm->GetControl("GREETING_LABEL", true);

// bind button, set its action id

// and the action listener (this app's class itself)

pButton = (Button*)pForm->GetControl("HELLO_BUTTON", true);

pButton->SetActionId(BUTTON_ACTION_GREET);

pButton->AddActionEventListener(*this);

returntrue;

}

Now the events sent by the button clicks will be forwarded to this apps class directly to the function youll

need to add at the end of this file:

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void

SimpleGreeting::OnActionPerformed(const Osp::Ui::Control& source, intactionId)


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{

String greeting = "Hello ";

switch(actionId)

{

caseBUTTON_ACTION_GREET:

// Set the greeting

greeting.Append(pField->GetText());

pLabel->SetText(greeting);

// redraw app's frame

pFrame->Draw();

pFrame->Show();

break;

default:

break;

}

}

Finally we need to tell the app to draw the Frame (and all in it) as soon as it is brought to the foreground(and/or as soon as the app starts).

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void

SimpleGreeting::OnForeground(void)

{

// draw and show the app's frame

pFrame->Draw();

pFrame->Show();

}

Thats all! Save all three files and build the project (Ctrl+B).


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Now we are ready to test this app in the bada simulator. Right-click the project->Run As->Bada

Simulator Application. The simulator will open up and run our app shortly.

This is a very brief, quick&dirty and straight-to-the-point example. Someone had to dig up his c++ know-

how for this. Please bear with that person . There is no funky professional c++ stuff in here, and I

know that YOU would rather write much better code instead Comments are still welcome. Here are the

complete two source code files:

SimpleGreeting.h

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#ifndef __SIMPLEGREETING_H__

#define __SIMPLEGREETING_H__

#include

#include


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#include

#include

#include

#include

#include

#include

usingnamespaceOsp::App;

usingnamespaceOsp::Base;

usingnamespaceOsp::Graphics;

usingnamespaceOsp::Io;

usingnamespaceOsp::Locales;

usingnamespaceOsp::System;

usingnamespaceOsp::Text;

usingnamespaceOsp::Ui;

usingnamespaceOsp::Ui::Controls;

staticconstintBUTTON_ACTION_GREET = 1;

/**

* [SimpleGreeting] application must inherit from Application class

* which provides basic features necessary to define an application.

*/

classSimpleGreeting :

publicApplication, publicIActionEventListener

{

private:

Frame *pFrame;

Form *pForm;


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Button *pButton;

Label *pLabel;

EditField *pField;

public:

/**

* [SimpleGreeting] application must have a factory method thatcreates an instance of itself.

*/

staticApplication* CreateInstance(void);

public:

SimpleGreeting();

~SimpleGreeting();

public:

/**

* The application must provides its name.

*/

String GetAppName(void) const;

protected:

/**

* The application must provide its ID.

*/

AppId GetAppId(void) const;

/**

* The application must provide a secret code.

*/


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AppSecret GetAppSecret(void) const;

public:

/**

* Called when the application is initializing.

*/

boolOnAppInitializing(AppRegistry& appRegistry);

/**

* Called when the application is terminating.

*/

boolOnAppTerminating(AppRegistry& appRegistry, boolforcedTermination= false);

/**

* Called when the application's frame moves to the top of the screen.

*/

voidOnForeground(void);

/**

* Called when this application's frame is moved from top of thescreen to the background.

*/

voidOnBackground(void);

/**

* Called when the system memory is not sufficient to run theapplication any further.

*/

voidOnLowMemory(void);


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/**

* Called when the battery level changes.

*/

voidOnBatteryLevelChanged(BatteryLevel batteryLevel);

/**

* Called on Actions

*/

virtualvoidOnActionPerformed(constOsp::Ui::Control& source, intactionId);

};

#endif

SimpleGreeting.cpp

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/**

* Name : SimpleGreeting

* Version : 1.0.0

* Vendor :

* Description :

*/

#include "SimpleGreeting.h"

SimpleGreeting::SimpleGreeting()

{

}

SimpleGreeting::~SimpleGreeting()

{


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}

Application*

SimpleGreeting::CreateInstance(void)

{

// Create the instance through the constructor.

returnnewSimpleGreeting();

}

String

SimpleGreeting::GetAppName(void) const

{

//WARNING:

// This method is automatically generated.

// Please don't modify it!

// Return the name of the application.

staticString appName(L"SimpleGreeting");

returnappName;

}

AppId

SimpleGreeting::GetAppId(void) const

{

//WARNING:



// Return the application ID.

staticAppId appId(L"93bt1p123e");


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returnappId;

}

AppSecret

SimpleGreeting::GetAppSecret(void) const

{

//WARNING:



// Return the secret code of the application.

static AppSecret appSecret(L"9C645DDBA19C71BAD1204DA4DAA7A0B9");

returnappSecret;

}

bool

SimpleGreeting::OnAppInitializing(AppRegistry& appRegistry)

{

// get the frame of the app

pFrame = GetAppFrame()->GetFrame();

// bind pForm to the Form we designed in resources

pForm = newForm();

pForm->Construct("IDF_FORM1");

// add the form as child to the app's frame and set it as current

pFrame->AddControl(*pForm);

pFrame->SetCurrentForm(*pForm);

// bind name input field


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pField = (EditField*)pForm->GetControl("NAME_FIELD", true);

pField->SetText("Your name in here!");

// bind label

pLabel = (Label*)pForm->GetControl("GREETING_LABEL", true);

// bind button, set its action id

// and the action listener (this app's class itself)

pButton = (Button*)pForm->GetControl("HELLO_BUTTON", true);

pButton->SetActionId(BUTTON_ACTION_GREET);

pButton->AddActionEventListener(*this);

returntrue;

}

bool

SimpleGreeting::OnAppTerminating(AppRegistry& appRegistry, boolforcedTermination)

{

// TODO:

// Deallocate resources allocated by this application fortermination.

// The application's permanent data and context can be saved viaappRegistry.

returntrue;

}

void

SimpleGreeting::OnForeground(void)

{

// draw and show the app's frame

pFrame->Draw();


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pFrame->Show();

}

void

SimpleGreeting::OnBackground(void)

{

// TODO:

// Stop drawing when the application is moved to the background.

}

void

SimpleGreeting::OnLowMemory(void)

{

// TODO:

// Free unused resources or close the application.

}

void

SimpleGreeting::OnBatteryLevelChanged(BatteryLevel batteryLevel)

{

// TODO:

// Handle any changes in battery level here.

// Stop using multimedia features(camera, mp3 etc.) if thebattery level is CRITICAL.

}

void

SimpleGreeting::OnActionPerformed(const Osp::Ui::Control& source, intactionId)

{

String greeting = "Hello ";


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switch(actionId)

{

caseBUTTON_ACTION_GREET:

// Set the greeting

greeting.Append(pField->GetText());

pLabel->SetText(greeting);

// redraw app's frame

pFrame->Draw();

pFrame->Show();

break;

default:

break;

}

}

Have fun!

bada hello everybody

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