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external javascript and grid.object

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  • external javascript and grid.object

    I have a javascript function set in a grid's Javascript Function Declaration. Because I want to use these js functions on several grids, I want to pull it out of Grid Properties and place it in my own js file to be available to all grids. But when moved to a javascript library it complains about the {Grid.object} and {Grid.componentname} syntax, like:

    {Grid.object}._setRowState(1,true); or '{Grid.ComponentName}.V.R1.'+fieldname+''

    Now I am pretty sure I can fix this by passing the {grid.object} and {grid.componentname} in the function call from the grid, like this:

    myjsfunctioncall({Grid.object},{Grid.componentname})

    But I would rather not have to do that. Does anyone know why an externally loaded js library would act different than the same code set in the grid's Javascript Function Declaration? Is there some low-level javascript I can use to replace {Grid.object} and {Grid.componentName} in my script that would work from the external library without me having to pass it in the function call?
    Steve Wood
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  • #2
    Re: external javascript and grid.object

    I wonder if you could load the library after the grid is initialized from the grid when {Grid.object} and {Grid.componentname} have been defined.
    Win 10 64 Development, Win 7 64 WAS 11-1, 2, Win 10 64 AA-1,2, MySql, dbForge Studio The Best MySQL GUI Tool IMHO. http://www.devart.com/dbforge/mysql/studio/

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    • #3
      Re: external javascript and grid.object

      That's a good idea. I need to see where Alpha puts the js reference. If it is above their grid code, this may be the cause.
      Steve Wood
      Join the ALPHA DEVELOPERS NETWORK
      There is no Cloud. It's just someone else's computer.
      Web - Mobile - Hosting - Products - Frameworks - Developer Resources
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      • #4
        Re: external javascript and grid.object

        Hi Steve,

        Your original comment about passing the {grid.object} and {grid.componentname} in the function call makes the most sense to me. But rather that pass individual parameters, why don't you create a blank object, then add whatever properties are relevant. I believe this is quite a well-accepted and universal approach in Javascript.

        myObj= {}; //new object
        myObj.object={grid.object};
        myObj.componentname={grid.componentname};

        myjsfunctioncall(myObj);

        Hope this generic approach is useful,
        Andy.

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        • #5
          Re: external javascript and grid.object

          I went through a lot of Alpha's own external javascript libraries, and where a grid object is required, they all take that as part of the function call. So you don't see {grid.object} in any external library, instead you see myfunction(gridobject,parentobject,childobject), etc. where the object name is passed in as text. So that is what I will do.
          Steve Wood
          Join the ALPHA DEVELOPERS NETWORK
          There is no Cloud. It's just someone else's computer.
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          • #6
            Re: external javascript and grid.object

            Sounds good to me Steve.
            Andy.

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            • #7
              Re: external javascript and grid.object

              Sending '{Grid.ComponentName}' in the function call is working, but I still don't understand why I cannot use '{Grid.ComponentName}' in the external js library.

              If I place this in OnGridRender, it pops up an alert with the Component Name, as expected.

              alert('{grid.componentName}');

              If instead, I place this in OnGridRender

              {grid.Object}.loadJavascriptFile('mylibrary.js');
              myfunction();


              Where mylibrary.js has this:

              myfunction() {
              alert('{grid.componentName}');
              }


              Why does that fail?

              I would like to find a way to load an external javascript library in to a grid so the functions would work the same as if I had typed them in to the Grid's Javascript Functions area.
              Steve Wood
              Join the ALPHA DEVELOPERS NETWORK
              There is no Cloud. It's just someone else's computer.
              Web - Mobile - Hosting - Products - Frameworks - Developer Resources
              AlphaToGo | IADN (100% Alpha Anywhere Websites)

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              • #8
                Re: external javascript and grid.object

                Steve,

                I think the loadJavascriptFile method is not loading your library; load a non existent file and you get the same error.
                Why don't you use the linked javascript file property in the grid? I tried quickly but I keep getting an error (missing ';')
                Frank

                Tell me and I'll forget; show me and I may remember; involve me and I'll understand

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                • #9
                  Re: external javascript and grid.object

                  Could be some asynchronous issue as well, if the library is not loaded yet then your function call will fail. From the wiki:

                  or the Linked JavaScript Files property, 'file1.js' and 'file2.js' will load simultaneously. This may be fine for your needs, but if there is code in 'file2.js' that can only work if 'file1.js' has already been loaded, then the asynchronous way in which the Javascript is loaded will present a problem.

                  NOTE: The Grid, Dialog and CustomComponent all have an {object}.loadJavascriptFile() method to load a Javascript file into the DOM. This method now takes an optional second parameter - the name of a Javascript function to call once the Javascript file has been loaded. When you specify Javascript files to load using the 'Linked Javascript Files' property, this method is used to load the Javascript.

                  To solve this problem, the components allow you to specify the name of a Javascript function to call when the component has been loaded. When you specify the name of the Javascript file, you can follow the filename with an optional '|' chracter and then the name of a Javascript function.
                  Frank

                  Tell me and I'll forget; show me and I may remember; involve me and I'll understand

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                  • #10
                    Re: external javascript and grid.object

                    It is loading the library, I left out that I tested that with an alert() in the library. I want to use an external library because I need to share the same functions across a random number of both grids and dialogs, and dont want to have to repeat the same code in each Javascript property area.
                    Steve Wood
                    Join the ALPHA DEVELOPERS NETWORK
                    There is no Cloud. It's just someone else's computer.
                    Web - Mobile - Hosting - Products - Frameworks - Developer Resources
                    AlphaToGo | IADN (100% Alpha Anywhere Websites)

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                    • #11
                      Re: external javascript and grid.object

                      Frank,

                      I will try the second parameter as you suggest.
                      Steve Wood
                      Join the ALPHA DEVELOPERS NETWORK
                      There is no Cloud. It's just someone else's computer.
                      Web - Mobile - Hosting - Products - Frameworks - Developer Resources
                      AlphaToGo | IADN (100% Alpha Anywhere Websites)

                      Comment


                      • #12
                        Re: external javascript and grid.object

                        Steve I mean this:

                        ljs.png
                        Frank

                        Tell me and I'll forget; show me and I may remember; involve me and I'll understand

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                        • #13
                          Re: external javascript and grid.object

                          I have mylibrary.js containing:

                          function myfunction() {
                          alert('test');
                          }

                          If I put this in Javascript Linked Files: mylibrary.js|myfunction

                          myfunction does not get called; I have to put the function in the Grid's javascript function declarations: that is not what the wiki says.
                          If I put it in the grid's function declarations then it executes twice
                          Last edited by Clipper87; 02-04-2012, 07:30 AM.
                          Frank

                          Tell me and I'll forget; show me and I may remember; involve me and I'll understand

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                          • #14
                            Re: external javascript and grid.object

                            Originally posted by Clipper87 View Post
                            Steve I mean this:

                            [ATTACH=CONFIG]30776[/ATTACH]
                            in your picture you show

                            Code:
                            mylibrary.js|myFunction()
                            this is wrong. it should be:

                            Code:
                            mylibrary.js|myFunction

                            Comment


                            • #15
                              Re: external javascript and grid.object

                              I know but it does not work either
                              Frank

                              Tell me and I'll forget; show me and I may remember; involve me and I'll understand

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