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277 lines (266 loc) · 8.27 KB
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*---------------------------------------------------------------
.
. Program Name: web_calc_class
. Description: This classmodule will display a sample web calcualtor.
.
. Revision History:
.
. 17 Jul 23 W Keech
. Original code
.
. This program is created using 'CLASSMODULE'.
. In this case, this program can ONLY be accessed using public
. entry points ( FUNCTIONs ) included in this PL/B program.
.
*
. The 'CLASSMODULE' MUST be the first statement in this program
. logic.
.
eStandAlone EQU 0
.
%IF eStandAlone = 0
CLASSMODULE
%ENDIF
INCLUDE plbequ.inc
INCLUDE plbmeth.inc
INCLUDE plbstdlib.inc
*---------------------------------------------------------------
.
. All PL/B variables in this class module are private.
. COMMON variables are NOT ALLOWED in a class module.
. Only public access is through FUNCTIONs.
. CHAIN, TRAP, and Routine are not allowed.
. The class module can not be executed directly.
. LRoutine is allowed.
CalcHtml INIT "<html> ":
"<head> ":
"<!-- Sample of a calculator --> ":
"<style> ":
"##calculator { ":
" border: solid; ":
" background-color: ##0d6efd; ":
" width: 400px; ":
" margin-left: auto; ":
" margin-right: auto; ":
" text-align: center; ":
" padding: 10px; ":
"} ":
"input.calc { ":
" width: 85%; ":
" height: 7%; ":
" text-align: right; ":
" padding: 5px; ":
" border: inset; ":
"} ":
"button.calc { ":
" background-color: ##6ea8fe; ":
" width: 90%; ":
" height: 10%; ":
" border: outset; ":
"} ":
" button.calc:hover { ":
" background-color: ##cfe2ff; ":
"} ":
" button.calc:active { ":
" border: inset; ":
" border-width: thick; ":
" border-color: ##FFFFFF; ":
"} ":
"input.calc, button.calc { ":
" font-family: Arial; ":
" font-size: 20pt; ":
" border-width: thick; ":
" border-color: ##FFFFFF; ":
" margin: 5px; ":
"} ":
".calc [readonly] { ":
" background-color: ##9ec5fe; ":
"} ":
"table.calc { ":
" width: 100%; ":
"} ":
"table.calc td { ":
" width: 25%; ":
"} ":
"</style> ":
"</head> ":
"<body> ":
" <div id='calculator'> ":
" <table class='calc'> ":
" <tr> ":
" <td colspan='4'> ":
" <input class='calc' id='txtResult' type='text' readonly='readonly' data-plbenable='on' /> ":
" </td> ":
" </tr> ":
" <tr> ":
" <td colspan='4'> ":
" <input class='calc' id='txtInput' type='text' data-plbenable='on' /> ":
" </td> ":
" </tr> ":
" <tr> ":
" <td></td> ":
" <td></td> ":
" <td><button class='calc' id='btnClearEntry' data-plbenable='on'>CE</button></td> ":
" <td><button class='calc' id='btnClear' data-plbenable='on'>C</button></td> ":
" </tr> ":
" <tr> ":
" <td><button class='calc' id='btnNumber7' data-plbenable='on'>7</button></td> ":
" <td><button class='calc' id='btnNumber8' data-plbenable='on'>8</button></td> ":
" <td><button class='calc' id='btnNumber9' data-plbenable='on'>9</button></td> ":
" <td><button class='calc' id='btnPlus' data-plbenable='on'>+</button></td> ":
" </tr> ":
" <tr> ":
" <td><button class='calc' id='btnNumber4' data-plbenable='on' >4</button></td> ":
" <td><button class='calc' id='btnNumber5' data-plbenable='on' >5</button></td> ":
" <td><button class='calc' id='btnNumber6' data-plbenable='on'>6</button></td> ":
" <td><button class='calc' id='btnMinus' data-plbenable='on' >-</button></td> ":
" </tr> ":
" <tr> ":
" <td><button class='calc' id='btnNumber1' data-plbenable='on' >1</button></td> ":
" <td><button class='calc' id='btnNumber2' data-plbenable='on' >2</button></td> ":
" <td><button class='calc' id='btnNumber3' data-plbenable='on'>3</button></td> ":
" <td><button class='calc' id='btnEqual' data-plbevent='click' data-plbenable='on' >=</button></td> ":
" <td></td> ":
" </tr> ":
" <tr> ":
" <td></td> ":
" <td><button class='calc' id='btnNumber0' data-plbenable='on'>0</button></td> ":
" <td></td> ":
" <td></td> ":
" </tr> ":
" </table> ":
" </div> ":
"<script type='text/javascript'> ":
"var txtInput; ":
"var txtResult; ":
" for (var i = 0; i < 10; i++) { ":
" document.getElementById('btnNumber'+i).addEventListener('click', numberClick, false); ":
" } ":
" txtInput = document.getElementById('txtInput'); ":
" txtResult = document.getElementById('txtResult'); ":
" document.getElementById('btnPlus').addEventListener('click', plusClick, false); ":
" document.getElementById('btnMinus').addEventListener('click', minusClick, false); ":
" document.getElementById('btnEqual').addEventListener('click', plusClick, false); ":
" document.getElementById('btnClearEntry').addEventListener('click', clearEntry, false); ":
" document.getElementById('btnClear').addEventListener('click', clear, false); ":
" clear(); ":
"function numberClick() { ":
" txtInput.value = txtInput.value == '0' ? this.innerText : txtInput.value + this.innerText; ":
" txtInput.focus(); ":
"} ":
"function plusClick() { ":
" txtResult.value = Number(txtResult.value) + Number(txtInput.value); ":
" clearEntry(); ":
" txtInput.focus(); ":
"} ":
"function minusClick() { ":
" txtResult.value = Number(txtResult.value) - Number(txtInput.value); ":
" clearEntry(); ":
" txtInput.focus(); ":
"} ":
"function clearEntry() { ":
" txtInput.value = '0'; ":
" txtInput.focus(); ":
"} ":
"function clear() { ":
" txtInput.value = '0'; ":
" txtResult.value = '0'; ":
" txtInput.focus(); ":
"} ":
"</script> ":
"</body> ":
"</html>"
CalcContainer HTMLCONTROL
JsonMsg PLBOBJECT
JsonData DIM 200
*................................................................
.
. Class Create
.
ClassCreate FUNCTION
ENTRY
.
. Create the JsonMsg PLBOBJECT to decode the $JQueryEvent event data
.
CREATE JsonMsg,CLASS="jsonmsg_class"
FUNCTIONEND
*................................................................
.
. Class Destroy
.
ClassDestroy FUNCTION
ENTRY
DESTROY CalcContainer
DESTROY JsonMsg
FUNCTIONEND
*................................................................
.
. Properties
.
Get_Value FUNCTION // Get the value of the calculator result
ENTRY
Result FORM 10
Value DIM 10
TEST CalcContainer
IF ZERO
MOVE "0" to Result
ELSE
CalcContainer.GetAttr Giving Value Using "txtResult","val"
MOVE Value to Result
ENDIF
FUNCTIONEND USING Result
.
Set_Value FUNCTION // Set the value of the calculator result
Num FORM 10
ENTRY
Value DIM 10
TEST CalcContainer
IF NOT ZERO
MOVE Num To Value
CalcContainer.SetAttr Using "txtResult","val",Value
ENDIF
FUNCTIONEND
*................................................................
.
. Local event handler
.
CalcEvent LFUNCTION // Handle the CalcContainer $JQueryEvent event
ENTRY
Id DIM 30
Result FORM 10
Value DIM 10
JsonMsg.ChangeMsg Using JsonData
GETPROP JsonMsg;*id=Id
IF (Id == "btnEqual" )
CalcContainer.GetAttr Giving Value Using "txtResult","val"
MOVE Value to Result
.
. Send the event to the associated PLBOBJECT
.
EVENTSEND *CLASS,$CHANGE,RESULT=Result
ENDIF
FUNCTIONEND
*................................................................
.
. Methods
.
CalcBind FUNCTION // Bind the HTML calculator to a provided PANEL object
Container Panel ^
ENTRY
MOVEPTR Container to Container
RETURN IF OVER
TEST Container
RETURN IF ZERO
CREATE Container;CalcContainer=1:1:1:1,Visible=1,dock=$DOCKFULL
CalcContainer.InnerHtml Using CalcHtml,$HTML_HAS_EVENTS
EVENTREG CalcContainer,$JQueryEvent,CalcEvent,ARG1=JsonData
FUNCTIONEND
......
*................................................................
.
. Testing
.
%IF eStandAlone = 1
CALL ClassCreate
%ENDIF
.
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