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webview - how to get values from js to FWH

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webview - how to get values from js to FWH

Postby Otto » Mon Jan 08, 2024 10:28 pm

Dear Antonio,

can you please show again an example of how to bring the values from JavaScript to Fivewin.

With kind regards,
Otto
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Re: webview - how to get values from js to FWH

Postby Antonio Linares » Mon Jan 08, 2024 10:49 pm

Dear Otto,

Please review FWH\samples\webviewuni2.prg

webviewuni2.prg
Code: Select all  Expand view
#include "FiveWin.ch"

//----------------------------------------------------------------------------//

function Main()

   local oWebView := TWebView():New()

   oWebView:Center()
   oWebView:bOnBind = { | cJson, cCalls | MsgInfo( cJson, cCalls ),;
                        oWebView:Return( cCalls, 0, "{ 'result': 'Hello from PRG' }" ) }
   oWebView:Bind( "SendToFWH" )
   oWebView:Navigate( Html() )
   Sleep( 200 )
   oWebView:Run()
   oWebView:Destroy()

return nil

//----------------------------------------------------------------------------//

function Html()

   local cHtml

   TEXT INTO cHtml
      data:text/html,
      <head><body>
      <button id='btn-test' >Click Me</button>
      <script>
      function test(evt) {  
          var someData = { 'param1': 'Hello from JS' };  
          var s = SendToFWH( evt.target.id, evt.type, someData )
          .then(s => {  
              alert(s.result);  
          })  
      }  
      document.getElementById('btn-test').addEventListener('click', test);  
      </script>
      </head></body>
   ENDTEXT      

return cHtml

//----------------------------------------------------------------------------//
regards, saludos

Antonio Linares
www.fivetechsoft.com
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Re: webview - how to get values from js to FWH

Postby Otto » Tue Jan 09, 2024 8:59 am

Dear Antonio,
thank you.
Best regards,
Otto
Last edited by Otto on Tue Jan 09, 2024 11:09 am, edited 1 time in total.
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Re: webview - how to get values from js to FWH

Postby Otto » Tue Jan 09, 2024 9:00 am

Dear Antonio,
thank you.
Best regards,
Otto
BTN-ADD

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BTN - Read
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Code: Select all  Expand view




    #include "FiveWin.ch"

    //----------------------------------------------------------------------------//

    static csend2js := "send from Harbour"
    static oWebView

    function Main()

     
    local hPost := {}

        oWebView := TWebView():New( 1, )  
        oWebView:bOnBind = { | cJson, cCalls | msginfo(cJson) ,;
                                                            hb_jsondecode( cJson, @hPost ), fromjavascirpt(hPost) ,   ;
                                             oWebView:Return( cCalls, 0, "{ 'result': '" + csend2js + "'  }" ) }
        oWebView:Bind( "SendToFWH" )
        oWebView:Navigate( Html() )
      oWebView:SetTitle( "This is Fivewin 2024" )
      Sleep( 200 )
      oWebView:Run()
      oWebView:Destroy()
     
    return nil
   
    //----------------------------------------------------------------------------//
     
function fromjavascirpt(hPost)
   local hTemp, aTemp


   xbrowse(hPost)


   aTemp := hPost[3]


   xbrowse(aTemp)


   hTemp :=  aTemp['param1']

   csend2js := "gelesen in FWH " + time()


   if hTemp['btn'] = 'read-btn'
      xbrowse(hTemp)
      ? hTemp['demotext']
   endif

   if hTemp['btn'] = 'add-btn'
      csend2js := "Add button clicked - time from FWH" + time() + ":"
   endif


return nil
//----------------------------------------------------------------------------//
     
      function Html()
      local cHtml
     
     
      TEXT INTO cHtml
       
      <head>
               
            <meta charset="UTF-8">
            <meta name="viewport" content="width=device-width, initial-scale=1">
            <title>Tischplan</title>
            <!-- Bootstrap CSS -->
            <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css">
            <!-- jQuery -->
            <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
            <!-- jQuery UI -->
            <script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
            <!-- Bootstrap JS -->
            <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
       
            <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0-beta3/css/all.min.css" />
        </head>

      <body>
        <style>
          .navbar {
            display: flex;
            justify-content: space-between;
          }
         
          .navbar-nav {
            display: flex;
            flex-direction: row;
          }
        </style>    
       
        <nav class="navbar">
          <ul class="navbar-nav">
            <form class="d-flex">
              <input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
              <button class="btn btn-outline-success" type="submit">Search</button>
            </form>
           
            <li class="nav-item">
              <button id="add-btn" class="btn btn-outline-success" >Add time()</button>
            </li>
           
            <li class="nav-item">
              <button id="read-btn" class="btn btn-outline-success">Read-(1)</button>
            </li>
           
            <li class="nav-item">
              <button id="edit-btn" class="btn btn-outline-success" >Edit</button>
            </li>
           
            <li class="nav-item">
              <button id="delete-btn" class="btn btn-outline-success">Delete</button>
            </li>
           
          </ul>
        </nav>
     
       
    <div class="container mt-5">
        <div class="accordion" id="accordionExample">
            <!-- Accordion item 1 -->
            <div class="accordion-item">
                <h2 class="accordion-header" id="headingOne">
                <button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
                    Accordion Item #1 <i class="fas fa-angle-down"></i>
                </button>
                </h2>
                <div id="collapseOne" class="accordion-collapse collapse show" aria-labelledby="headingOne" data-bs-parent="#accordionExample">
                <div class="accordion-body">
                    <strong>This is the first item's accordion body.</strong> It is shown by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions.
                   <H1><p id="txtContent"> </p></H1>
               
                </div>
                </div>
            </div>
            <!-- Accordion item 2 -->
            <div class="accordion-item">
                <h2 class="accordion-header" id="headingTwo">
                <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
                    Accordion Item #2 <i class="fas fa-angle-down"></i>
                </button>
                </h2>
                <div id="collapseTwo" class="accordion-collapse collapse" aria-labelledby="headingTwo" data-bs-parent="#accordionExample">
                <div class="accordion-body">
                    <strong>This is the second item's accordion body.</strong> It is hidden by default until its collapse is toggled.
                </div>
                </div>
            </div>
            <!-- Accordion item 3 -->
            <div class="accordion-item">
                <h2 class="accordion-header" id="headingThree">
                <button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
                    Accordion Item #3 <i class="fas fa-angle-down"></i>
                </button>
                </h2>
                <div id="collapseThree" class="accordion-collapse collapse" aria-labelledby="headingThree" data-bs-parent="#accordionExample">
                <div class="accordion-body">
                    <strong>This is the third item's accordion body.</strong> It is hidden by default until its collapse is toggled.
                </div>
                </div>
            </div>
        </div>
    </div>
        <script>
         
          function test(evt) {  
            var content = document.getElementById('txtContent').value;
         
            const data = {
              text: content,
              demotext: 'Hallo nice',
              btn: 'read-btn'
            };
           
            var someData = {
                        'param1': data,
                        'param2': 'value2',
                        'param3': 123,
                        'param4': true
                    };
                   
           
            var s = SendToFWH( evt.target.id, evt.type, someData )
            .then(s => {  
              alert(s.result);  
            })  
          }  
          document.getElementById('read-btn').addEventListener('click', test);  
         
         
          document.getElementById('add-btn').addEventListener('click', addbtn);  
          function addbtn(evt) {
            const data = {
              text: 'Add button clicked',
              btn: 'add-btn'
            };
            var someData = { 'param1': data };  
            var s = SendToFWH( evt.target.id, evt.type, someData )
            .then(s => {  
             document.getElementById('txtContent').innerHTML = s.result;  
            })  
          }
         
         
         
          document.getElementById('edit-btn').addEventListener('click', editbtn);  
          function editbtn(evt) {
           
            const data = {
              text: 'editbtn button clicked',
               btn: ''
            };
            var someData = { 'param1': data };  
            var s = SendToFWH( evt.target.id, evt.type, someData )
            .then(s => {  
              alert(s.result);  
            })  
           
          }
         
          document.getElementById('delete-btn').addEventListener('click', deletebtn);  
          function deletebtn() {
            alert('delete button clicked');
          }
         
        </script>
       
       
      </body>
     
     
     
     
     
      ENDTEXT  
        cHtml := STRTRAN(cHtml, CRLF, '')
        cHtml :=  URLEncode( ALLTRIM( cHtml ) )
       
         
       
       
       
       
         
      return cHtml
      //----------------------------------------------------------------------------//      
     
       
       FUNCTION URLEncode(cString)
       LOCAL cEncodedString := ""
       LOCAL nLen := LEN(cString)
       LOCAL nAscii, nPos

       FOR nPos = 1 TO nLen
          nAscii := ASC(SUBSTR(cString, nPos, 1))
          DO CASE
             CASE nAscii >= 48 .AND. nAscii <= 57 // 0-9
                cEncodedString += CHR(nAscii)
             CASE nAscii >= 65 .AND. nAscii <= 90 // A-Z
                cEncodedString += CHR(nAscii)
             CASE nAscii >= 97 .AND. nAscii <= 122 // a-z
                cEncodedString += CHR(nAscii)
             CASE nAscii == 45 .OR. nAscii == 46 .OR. nAscii == 95 .OR. nAscii == 126 // - . _ ~
                cEncodedString += CHR(nAscii)
             CASE nAscii == 10
                cEncodedString += "%0A"
             OTHERWISE
                cEncodedString += "%" + NumToHex(nAscii, 2)
          ENDCASE
       NEXT
     
        cEncodedString :=  "data:text/html, " + cEncodedString
    RETURN cEncodedString

//----------------------------------------------------------------------------//      







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Re: webview - how to get values from js to FWH

Postby Otto » Tue Jan 09, 2024 9:02 am

1. Create the WebView Object

2. Interoperability Bridge (from JavaScript)
Function for communication and data transfer between the two different programming languages JavaScript and Harbour

3. WebView Layer:
Part of the program that uses web technologies (HTML, CSS, JavaScript) within a WebView to implement user interfaces and frontend logic.
Last edited by Otto on Tue Jan 09, 2024 11:07 am, edited 1 time in total.
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Re: webview - how to get values from js to FWH

Postby Otto » Tue Jan 09, 2024 9:02 am

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Re: webview - how to get values from js to FWH

Postby Antonio Linares » Tue Jan 09, 2024 6:38 pm

Dear Otto,

very good! :-)
regards, saludos

Antonio Linares
www.fivetechsoft.com
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