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--- sample_code:unit_convert [2014/11/01 12:52]
106.77.65.188 [The code]
+++ sample_code:unit_convert [2014/11/01 20:55]
@@ Line 1: / Line 1: @@
-====== Converterlator ======
-Calculator+Converter app.
-===== The code =====
-<code javascript unit_convert.js>
-//variables for converter.
-var unitval = [];
-unitval ["mm"] = 1;
-unitval ["cm"] = 10
-unitval ["m"] = 1000;
-unitval ["km"] =1000000;
-unitval ["g"] = 1;
-unitval ["pound"] = 453.59;
-unitval ["kg"] = 1000;
-//variables for calculator.
-var sum = "";
-var π = 3.14;
-//Called when application is started.
-function OnStart()
-{
-    //Create a main layout with objects vertically centered.
-    lay = app.CreateLayout( "linear", "FillXY" );
-    lay.SetBackColor( "#ff000000" );
-    //Create array to hold number buttons.
-    keys = [ 7,8,9,"/", 4,5,6,"*", 1,2,3,"-", 0,".","C","+","√","π", "=", "%" ];
-    //Create an about button.
-    abt = app.CreateButton( "About" );
-    abt.SetOnTouch( abt_OnTouch );
-    lay.AddChild( abt );
-    //Create a spinner for Background colour.
-    clrs = app.CreateSpinner( "Background Color-Black,Blue,Red,Yellow,Purple,Orange,White" );
-    clrs.SetOnTouch( clrs_OnTouch );
-    lay.AddChild( clrs );
-    //Create text control for displaying sum.
-    txtSum = app.CreateText( "", 1.0, 0.1 );
-    txtSum.SetTextSize( 42 );
-    txtSum.SetBackColor( "#ff222222" );
-    txtSum.SetMargins( 0, 0.05, 0, 0.05 );
-    lay.AddChild( txtSum );
-    //Create first row of buttons.
-    lay1st = app.CreateLayout( "linear", "Horizontal" );
-    for( i=0; i<4; i++ ) AddButton( lay1st, keys[i] );
-    lay.AddChild( lay1st );
-    //Create second row of buttons.
-    lay2nd = app.CreateLayout( "linear", "Horizontal" );
-    for( i=4; i<8; i++ ) AddButton( lay2nd, keys[i] );
-    lay.AddChild( lay2nd );
-    //Create third row of buttons.
-    lay3rd = app.CreateLayout( "linear", "Horizontal" );
-    for( i=8; i<12; i++ ) AddButton( lay3rd, keys[i] );
-    lay.AddChild( lay3rd );
-    //Create fourth row of buttons.
-    lay4th = app.CreateLayout( "linear", "Horizontal" );
-    for( i=12; i<16; i++ ) AddButton( lay4th, keys[i] );
-    lay.AddChild( lay4th );
-    //Create fifth row of buttons.
-    lay5th = app.CreateLayout( "linear", "Horizontal" );
-    for( i=16; i<20; i++ ) AddButton( lay5th, keys[i] );
-    lay.AddChild( lay5th );
-    //Create a converter button.
-    cnvrtr = app.CreateButton( "Converter", 0.4, 0.1 );
-    cnvrtr.SetOnTouch( cnvrtr_OnTouch );
-    cnvrtr.SetMargins( 0, 0.02, 0, 0 );
-    lay.AddChild( cnvrtr );
-    //Set Debug off for max performance.
-    app.SetDebugEnabled( false );
-    app.EnableBackKey( false );
-    //Add layout to app.
-    app.AddLayout( lay );
-}
- function OnBack()
-{
- var yesno = app.CreateYesNoDialog( "Exit Converlator?" );
- yesno.SetOnTouch( yesno_OnTouch );
-}
- function yesno_OnTouch( result )
-{
- if( result == "Yes" ) app.Exit();
-}
- function abt_OnTouch()
-{
- //Create a dialog window.
- dlg = app.CreateDialog( "About" );
- //Create a layout for dialog.
- laydlg = app.CreateLayout( "linear" );
- dlg.AddLayout( laydlg );
- vrsn = app.CreateText( "Version : 1.0" );
- vrsn.SetTextSize(24);
- vrsn.SetMargins( 0, 0, 0, 0.02 );
- laydlg.AddChild(vrsn);
- nm = app.CreateText( "Developer : Sankarshan Dudhate" );
- nm.SetTextSize(20);
- nm.SetPadding(0.05, 0, 0, 0 );
- laydlg.AddChild(nm);
- dlg.Show();
-}
- function clrs_OnTouch()
-{
- if(clrs.GetText() == "Blue")
-{
- lay.SetBackColor("#ff0000ff" );
-}
- else if( clrs.GetText() == "Red")
-{
- lay.SetBackColor("#ffff0000" );
-}
- else if( clrs.GetText() == "Yellow" )
-{
- lay.SetBackColor( "#ffffff00" );
-}
- else if( clrs.GetText() == "Purple" )
-{
- lay.SetBackColor( "#aa770077" );
-}
-else if( clrs.GetText() == "Orange" )
-{
- lay.SetBackColor( "#ffff6700" );
-}
- else if( clrs.GetText() == "White" )
-{
- lay.SetBackColor( "#ffffffff" );
-}
- else
-{
- lay.SetBackColor( "#ff000000" );
-}
-}
-//Add a button to a given layout.
-function AddButton( lay, name )
-{
-    if( name=="=" ) w = 0.2; else w=0.2;
-    btn = app.CreateButton( name, w, 0.1, "Alum" );
-    btn.SetOnTouch( btns_OnTouch );
-    lay.AddChild( btn );
-}
-//Called when user presses number buttons.
-function btns_OnTouch()
- {
-    app.Vibrate( "0,100" );
-    //Get button text.
-    btn = app.GetLastButton();
-    var txt = btn.GetText();
-    //Handle equals button.
-    if( txt=="=" ) CalcResult();
-    //Handle clear button.
-    else if( txt=="C" ) sum = "";
-    else if( txt=="√" )
-  {
-        sum = Math.sqrt( sum );
-  }
-    //Handle other buttons.
-    else sum += txt;
-    //Update display.
-    txtSum.SetText( sum );
-}
-//Calculate sum.
-function CalcResult()
-{
-    try{
-        //Evaluate sum (and catch errors).
-        sum = eval( sum ).toFixed(4);
-    }
-    catch(e) { sum = "Error" }
-}
- function cnvrtr_OnTouch()
-{
- //Hide the objects from calculator.
- txtSum.SetVisibility( "Gone" );
- lay1st.SetVisibility( "Gone" );
- lay2nd.SetVisibility( "Gone" );
- lay3rd.SetVisibility( "Gone" );
- lay4th.SetVisibility( "Gone" );
- lay5th.SetVisibility( "Gone" );
- cnvrtr.SetVisibility( "Gone" );
- //Create a spinner for quantities.
- qnt = app.CreateSpinner( "Length,Mass", 0.4, 0.1 );
- qnt.SetOnTouch( qnt_OnTouch );
- qnt.SetMargins( 0, 0.05, 0, 0.02 );
- lay.AddChild( qnt );
- //Create 1st layout for unit and text edit.
- lay1 = app.CreateLayout( "Linear", "Horizontal" );
- lay.AddChild( lay1 );
- //Create 2nd layout for unit and text edit.
- lay2 = app.CreateLayout( "Linear", "Horizontal" );
- lay.AddChild( lay2 );
- /* We will set SetOnTouch callbacks of unt as well as edt
- to be same because if anyone is edited, we should calculate
- same result. So, instead of doing two different callbacks for
- them, we will set same for both of them. */
- //Create a spinner for 1st units.
- unt1 = app.CreateSpinner( "mm,cm,m,km", 0.3, 0.1);
- unt1.SetOnTouch( unt1_OnTouch );
- lay1.AddChild( unt1 );
- //Create text edit to take value.
- edt1 = app.CreateTextEdit( "0", 0.7, 0.1 );
- edt1.SetOnChange( unt1_OnTouch );
- lay1.AddChild( edt1 );
- //Create a spinner for 2nd units.
- unt2 = app.CreateSpinner( "mm,cm,m,km", 0.3, 0.1 );
- unt2.SetOnTouch( unt2_OnTouch );
- lay2.AddChild( unt2 );
- //Create text edit to take value.
- edt2 = app.CreateTextEdit( "0", 0.7, 0.1 );
- edt2.SetOnChange( unt2_OnTouch );
- lay2.AddChild( edt2 );
- //Create a calculator button.
- clc = app.CreateButton( "Calculator", 0.4, 0.1 );
- clc.SetOnTouch( clc_OnTouch );
- clc.SetMargins( 0, 0.1, 0, 0 );
- lay.AddChild( clc );
-}
- function qnt_OnTouch()
-{
- if( qnt.GetText() == "Mass" )
-{
- unt1.SetList( "g,pound,kg" );
- unt2.SetList( "g,pound,kg" );
-}
-}
- function unt1_OnTouch()
-{
- //Create variables to hold values of inputs.
- var a = unitval[unt1.GetText()];
- var b = unitval[unt2.GetText()];
- qty = edt1.GetText();
- res = qty*a/b;
- edt2.SetText( res );
-}
- function unt2_OnTouch()
-{
- //Create variables to hold values of inputs.
- var a = unitval[unt1.GetText()];
- var b = unitval[unt2.GetText()];
- qty = edt2.GetText();
- res = qty*b/a;
- edt1.SetText( res );
-}
- function isNumber(n)
-{
-  return !isNaN(parseFloat(n)) && isFinite(n);
-}
- function clc_OnTouch()
-{
-    //Hide the objects of converter.
-    qnt.SetVisibility( "Gone" );
-    lay1.SetVisibility( "Gone" );
-    lay2.SetVisibility( "Gone" );
-    clc.SetVisibility( "Gone" );
-    //Create text control for displaying sum.
-    txtSum = app.CreateText( "", 1.0, 0.1 );
-    txtSum.SetTextSize( 42 );
-    txtSum.SetBackColor( "#ff222222" );
-    txtSum.SetMargins( 0, 0.05, 0, 0.05 );
-    lay.AddChild( txtSum );
-    //Create first row of buttons.
-    lay1st = app.CreateLayout( "linear", "Horizontal" );
-    for( i=0; i<4; i++ ) AddButton( lay1st, keys[i] );
-    lay.AddChild( lay1st );
-    //Create second row of buttons.
-    lay2nd = app.CreateLayout( "linear", "Horizontal" );
-    for( i=4; i<8; i++ ) AddButton( lay2nd, keys[i] );
-    lay.AddChild( lay2nd );
-    //Create third row of buttons.
-    lay3rd = app.CreateLayout( "linear", "Horizontal" );
-    for( i=8; i<12; i++ ) AddButton( lay3rd, keys[i] );
-    lay.AddChild( lay3rd );
-    //Create fourth row of buttons.
-    lay4th = app.CreateLayout( "linear", "Horizontal" );
-    for( i=12; i<16; i++ ) AddButton( lay4th, keys[i] );
-    lay.AddChild( lay4th );
-    //Create fifth row of buttons.
-    lay5th = app.CreateLayout( "linear", "Horizontal" );
-    for( i=16; i<20; i++ ) AddButton( lay5th, keys[i] );
-    lay.AddChild( lay5th );
-    //Create a converter button.
-    cnvrtr = app.CreateButton( "Converter", 0.4, 0.1 );
-    cnvrtr.SetOnTouch( cnvrtr_OnTouch );
-    cnvrtr.SetMargins( 0, 0.02, 0, 0 );
-    lay.AddChild( cnvrtr );
-}
-</code>
-===== Note =====
-This app is in no way the sort that anyone might wish to use in real life.
-It is just a very simplistic demo of the type of approach that might be taken.

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