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protogrid:script_library [2017-12-15 09:47] 46.140.51.3protogrid:script_library [2022-05-16 15:35] (current) – [Execute JS on field change] dru
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 Protogrid can be extended arbitrarily using [[https://www.w3schools.com/js/|Java script]] libraries. The libraries are located at the "Code"-Tab in the Design-Tab. We differentiate two types of script libraries: server-side and client-side. The can be several libraries per type. On creation of the libraries, they already contain some code and some explanations to fast understand what to do. Protogrid can be extended arbitrarily using [[https://www.w3schools.com/js/|Java script]] libraries. The libraries are located at the "Code"-Tab in the Design-Tab. We differentiate two types of script libraries: server-side and client-side. The can be several libraries per type. On creation of the libraries, they already contain some code and some explanations to fast understand what to do.
  
-===== Server-ScriptLibrary =====+===== Server ScriptLibrary =====
  
-Server-ScriptLibraries contain code happening at the server before sending the data to the client. Every [[protogrid:proto|Proto]] can have a server side library attached. Whenever something is done with a [[protogrid:card|Card]] of this Proto on the server, the Server takes the assigned library into account. The server side libraries contain mainly the following functions: on_render, on_save, get_shortname, get_title. +Server ScriptLibraries contain code happening at the server before sending the data to the client. Every [[protogrid:proto|Proto]] can have a server side library attached. Whenever something is done with a [[protogrid:card|Card]] of this Proto on the server, the Server takes the assigned library into account. The server side libraries contain mainly the following functions: on_render, on_save, get_shortname, get_title. 
 ==== on_render ==== ==== on_render ====
 on_render gets called when opening a new Card. This function can be used for example to [[protogrid:hide_field| hide fields]] of the Card. Inside the on_render function, one has access to the card which is opening as well as to a predicate called "before_first_save" telling you whether the Card was already saved before or not (if not, it is a newly created Card).  on_render gets called when opening a new Card. This function can be used for example to [[protogrid:hide_field| hide fields]] of the Card. Inside the on_render function, one has access to the card which is opening as well as to a predicate called "before_first_save" telling you whether the Card was already saved before or not (if not, it is a newly created Card). 
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 ===== Client ScriptLibrary ===== ===== Client ScriptLibrary =====
 The client-side script library contains all the code happening locally on the clients machine. This contains all the code executed when [[protogrid:trigger|triggered]] by a client action, especially the code that should be executed at [[protogrid:button|button]] clicks. The client-side script library contains all the code happening locally on the clients machine. This contains all the code executed when [[protogrid:trigger|triggered]] by a client action, especially the code that should be executed at [[protogrid:button|button]] clicks.
 +
 +Please note that all your code should reside within a enclosing function in order to limit its scope and avoid naming conflicts. Protogrid supports you in this by automatically providing such an enclosing function in the default Client ScriptLibrary and dynamically replacing the identifier of this enclosing function with the name of the Client ScriptLibrary before loading it into the browser. However, you are free to set your own static unique identifier for this function.
  
 ==== Execute JS on card load ==== ==== Execute JS on card load ====
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 To execute some JavaScript code at the time, a card is loaded, there are two options.  To execute some JavaScript code at the time, a card is loaded, there are two options. 
  
-If you want to execute this code only for one proto, you add the code inside a Client-ScriptLibrary and make sure you have a Trigger on the Proto which is linked with this ScriptLibrary. This will make the browser to load all code when the cards are loaded and the browser will execute all code on loading of the ScriptLibrary, which is not enclosed in a function. So just add in the ScriptLibrary:+If you want to execute this code only for one proto, you add the code inside a Client ScriptLibrary and make sure you have a Trigger on the Proto which is linked with this ScriptLibrary. This will make the browser to load all code when the cards are loaded and the browser will execute all code on loading of the ScriptLibrary, which is not enclosed in a function. So just add in the ScriptLibrary:
  
 <code javascript> <code javascript>
 on_load(); on_load();
 function on_load() { function on_load() {
-    //do something useful+    alert("Hello World!"); 
 +    //do something more useful
 } }
 </code> </code>
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 The function document_ready_trigger tells your card that you want something to happen when a value changes. The call "$(document).ready(...)" itself calls the function "document_ready_trigger" as soon as the card is fully loaded. The function document_ready_trigger tells your card that you want something to happen when a value changes. The call "$(document).ready(...)" itself calls the function "document_ready_trigger" as soon as the card is fully loaded.
 +
 +==== Activate Save Buttons ====
 +After a manipulation of Fields on a Card you might want to activate the save buttons in order to let the user save the modified Card. Just call modifications_on_current_card() after setting a field value:
 +<code javascript>
 +var csl_helpers = mod_csl_helpers();
 +csl_helpers.set_value(csl_keys.field_key_sample_field, "just a test");
 +modifications_on_current_card();
 +</code>
 +==== Manipulate Contet of Rich Text Field ====
 +
 +<code javascript>
 +var rich_text_editor = $("#" + $.escapeSelector(rich_text_field_id))[0].editor;       // Get object of Rich Text Editor
 +
 +var content = rich_text_editor.getDocument().toString();                              // Get complete content as string
 +var current_range = rich_text_editor.getSelectedRange();                              // Get cursor posistion / selected text range
 +
 +rich_text_editor.setSelectedRange([0, 0]);                                            // Set cursor to position 0
 +rich_text_editor.setSelectedRange([0, 10]);                                           // Set text selection from position 0 to position 10
 +rich_text_editor.insertString("Hello!"                                              // Insert String at selected position
 +rich_text_editor.insertHTML("<strong>Hello World!</strong>");                         // Insert HTML at selected position
 +rich_text_editor.insertLineBreak();                                                   // Insert line break
 +rich_text_editor.deleteInDirection("forward");                                        // Delete selected range
 +rich_text_editor.activateAttribute("bold"                                           // Activate attribute at selected range
 +rich_text_editor.deactivateAttribute("strike"                                       // Deactivate attribute at selected range
 +</code>
 +
 +Please see https://github.com/basecamp/trix for details.
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