Webix Views: Essentials

Widget API

Webix Modules

Widget Nature

Webix Debug

    <script type="text/javascript" src="http://cdn.webix.com/edge/webix.js"></script>
    <link rel="stylesheet" type="text/css" href="http://cdn.webix.com/edge/webix.css">
  • human-readable code
  • comprehensible error stack
  • warning messages for typical mistakes
  • logging event flow to console
  • right-click menu for each widget

Webix Debug

Ctrl+Right Click

webix.debug({events:true});

Webix Views

ui.view

Layout

Button

Window

List

popup & suggests

Chart

Datatable

other lists

Tree

form controls

Form, Toolbar

Data Loader

DataStore

MouseEvents

Settings

EventSystem

* for all

* for most

* for data components

Mixins

  • Editability
  • ProgressBar

https://docs.webix.com/api__toc__ui_mixins.html

  • SelectionModel
  • KeysNavigation
  • PagingAbility
  • DataStore
  • TreeStore
  • Number
  • Date
  • PowerArray
  • UIManager
  • DataCollection
  • TreeCollection
  • DataProcessor

Extend component's API:

Used independently:

* used by data components

Helpers

  • webix.ajax
  • webix.promise
  • webix.html
  • webix.storage.local
  • webix.i18n

Ajax and Promises

Localization

HTML and Browser

webix.ajax(url).then(function(data){
    ... 
});
webix.storage.local.put("--app:data--", { ... });
var data = webix.storage.local.get("--app:data--");
var text = webix.i18n.dateFormatStr(new Date());
//"02/20/2018"

Other

  • webix.delay
  • webix.toFunctor
webix.toFunctor("webix.message('test')");

Webix UI

  webix.ui({
    id:"top", cols:[
        { view:"button", id:"addBtn", value:"Add", click:function(){ ... }},
        { view:"button", id:"delBtn", value:"Delete", click:function(){ ... }}
    ]
  });
<div class="webix_view webix_control webix_el_button webix_secondary" 
        view_id="addBtn" style="width: 200px; height: 38px;">
        <div class="webix_el_box" style="width:200px; height:38px">
            <button type="button" class="webix_button">Add</button>
        </div>
</div>

View Instances

var views = webix.ui.views;
/*{
    top:{ ..view object ..},
    addBtn:{ ..view object ..},
    delBtn:{ ..view object ..}
}*/
  webix.ui({
    id:"top", cols:[
        { view:"button", id:"addBtn", value:"Add", click:function(){ ... }},
        { view:"button", id:"delBtn", value:"Delete", click:function(){ ... }}
    ]
  });
$$("addbtn") or webix.$$("addBtn")

All view instances in the application:

var topLayout = webix.ui({ id:"top", rows:[] });

1.

2.

View Name

  • Spacer

  • Template  

  • Layout  

  • Multiview  

  • Accordion 

    { }
    { template:"some" }

    { rows:[ ] }
    { cols:[ ] }
    { cells:[ ] }
    { cols:[ { header:"Some", body:{}} ]}
    { rows:[ { header:"Other", body:{}} ]}

No view name or key settings?    

Spacer

View API


webix.ui({
    view:"button",
    id:"addBtn",
    value:"Click me",
    width:200
});

console.log($$("addBtn").config);
{
  borderless: true,
  width: 200,
  height: 38,
  gravity: 1,
  view: "button",
  id: "mybutton",
  value: "Click me",
  $topView: true
}

Essentials:

  • id must be unique or none
  • width / height must be a number
  • margin / padding must be set via JS config
  • container kills responsiveness

View API

  • Public
  • Private
  • Inner
$$("addBtn").getParentView();
$$("table").parse(data);

$$("addBtn").config;
$$("table").data.pull;
//anything, starting with $
$$("table").$getSize();
$$("table").$setSize(x, y);
$$("table").$skin();
$$("table").$ready();

$$("table").$height
$$("table").$width;
$$("table").$view;


//anything, starting with _
$$("table")._settings;
$$("table")._columns;

View Events

    [list@$list3] event:onmouseout  [MouseEvent] webix.js:487
    [list@$list2] event:onitemclick (3) ["5", MouseEvent, div.webix_list_item]
    [list@$list2] event:onbeforeselect (2) ["5", true]
    [list@$list2] event:onbeforeunselect (2) ["7", false]
    [list@$list2] event:onafterunselect ["7"]
    [list@$list2] event:onitemrender [{ id:"7", ...}]
    [list@$list2] event:onitemrender [{id:"5", ...}]
    [list@$list2] event:onselectchange [["5"]]
    [list@$list2] event:onafterselect ["5"]
    [core@undefined] event:onclick  [MouseEvent]
    webix.debug({events:true});

component | module @ id event name [ ..parameters.. ]

  • EventSystem mixin
  • Indicate view processes​
    • mouse actions, data updates, changing state

View Events

  • Listen to events
  • Call events

attachEvent 

callEvent

  • name:  case-insensitive
  • handler:  named or anonymous function, string that can be resolved
  • parameters: array
$$("mylist").attachEvent("onItemClick", function(id){
    webix.message("Item was clicked "+id);
});
{ view:"list", on:{
     onItemClick:function(id){
         webix.message("Item was clicked "+id);
     }
}}

or on

$$("mylist").callEvent("onItemClick", [1]);
$$("mylist").callEvent("onAnyCustomAction", ["param1", "param2"]);

View Events

  • Can be prevented
  • Can be blocked
    //HTML events -> e.preventDefault in hanlder
    //Webix view "-before" events -> return false in handler

    $$("mytable").attachEvent("onBeforeEditStart", function(id){
        if(id > 10) return false;
    });
    $$("mytext").blockEvent();
    $$("mytext").setValue("silent");
    $$("mytext").unblockEvent();
  • Can be handled once
    view:"datatable",
    on:{
        onAfterRender: webix.once(function(){
            webix.message("I'm here");
        });
    }

Extending Components

*built-in work in the same way

webix.protoUI({
    name:"editlist"
}, webix.EditAbility, webix.ui.list);

webix.ui({
    view:"editlist", 
    template:"#rank#. #title#",
    editable:true,
    editor:"text",
    editValue:"title"
});
webix.ui({ view:"datatable",  id:"data", data: small_film_set });

webix.extend($$("data"), webix.ProgressBar);

1. Mixing extra functionality to view instance

2. Creating a separate component

Creating Components

webix.protoUI({
    name:"menuList",
    ...
}, webix.ui.list);


webix.protoUI({
    name:"editList",
    ...
}, webix.EditAbility, webix.ui.list);
  • name - unique or may coincide with another view's
  • $init - pre-initialization logic
  • .. any other properties and methods

Order of Inheritence

webix.protoUI({
    name:"editList",
    //other methods
    getEditableRow:function(){ ... },
    setEditValue:function(){ ... },
}, webix.EditAbility, webix.ProgressBar, webix.ui.list);
  • own functionality
    • here: name, getEditableRow, setEditValue
  • other mixins in a reversed order
    • here: webix.ui.list, webix.ProgressBar, webix.EditAbility

 Settings

webix.protoUI({
    name:"menuList",
    defaults:{
        select:true
    },
    $init:function(config){
       config.select = true;
    },
    menu_setter:function(value){
  	if(!webix.isArray(value))
          value = [value];
        return value;
    }
}, webix.ui.list);
  • defaults - can be overwritten by configuration
  • $init - can modify/add settings
  • setters - can modify initial settings

 Lifetime Handlers

webix.protoUI({
    name:"menuList",
    defaults:{
        select:true
    },
    $init:function(config){
       this.$ready.push(this.initMenu);
    },
    initMenu:function(){
        this.menu = webix.ui({
            view:"contextmenu" 
        });
    }
}, webix.ui.list);
  • $init - called before view is initialized
  • $ready - array of callbacks that are called after view is initialized 

 Lifetime Handlers

webix.protoUI({
    name:"menuList",
    $init:function(config){
       this.attachEvent("onDestruct", function(){
           this.menu.destructor();
       });
    },
    initMenu:function(){
        this.menu = webix.ui({
             view:"contextmenu" 
        });
    }
}, webix.ui.list);
  • onDestruct - called before view is destroyed

You need to destroy everything you create!

Initialization Order

webix.protoUI({
    name:"menuList",
    defaults:{
        select:true
    },
    $init:function(config){
        //firstly
       this.$ready.push(this.initMenu);
    },
    initMenu:function(){
        //thirdly
    },
    menu_setter:function(value){
        //secondly
  	if(!webix.isArray(value))
          value = [value];
        return value;
    }
}, webix.ui.list);
  • $init  is called
  •  all the setters
  • $ready callbacks 

 Component Methods

webix.protoUI({
    name:"menuList",
    defaults:{
        select:true
    },
    $init:function(config){
       this.$ready.push(this.initMenu);
    },
    initMenu:function(){
        this.menu = webix.ui({
            view:"contextMenu" 
        });
    },
    getVisibleCount:function(){
        var count = webix.ui.list.prototype.getVisibleCount.apply(this, arguments);    
        return count+10;
    },
    destructor:function(){
        // smth that should happen before
        webix.Destruction.destructor.apply(this,arguments);
    }
}, webix.ui.list);
  • own - own logic
  • parent's - totally or partially  redefined

Component Events

  • $init
  • on, for defaults
$init:function(config){
    this.attachEvent("onItemClick", function(id){
        webix.message("Item clicked "+id);
    });
}
defaults:{
    on:{
        onItemClick: function(id){
            webix.message("Item clicked "+id);
        }
    }
}

* Can be overwritten with the "on" setting in view configuration

Full example: https://webix.com/snippet/a3e56173

Components Size

  • $getSize(x, y)
  • $setSize(x, y)
$getSize:function(x, y){
    //own logic
    ...
    //parent logic
    return webix.ui.view.prototype.$getSize.call(this, x, y);
}

* returns [min width, max width, min height, max height, gravity]

$setSize:function(x,y){
    //if parent has changed its size
    if(webix.ui.view.prototype.$setSize.call(this, x, y)){
        //custom logic
    }
}

* can return true to indicate that the size has been changed

Components CSS

webix.protoUI({
    name:"menuList",
    $init:function(config){
        this.$view.className += " menu_list";
    }
}, webix.ui.list);
<div class="webix_view webix_list menu_list" style="width: 234px; height: 927px;">
    <div class="webix_scroll_cont">
        <div webix_l_id="1" class="webix_list_item">Item 1</div>
        <div webix_l_id="2" class="webix_list_item">Item 2</div>
    </div>
</div>

1. Appending an extra class name:

Controls CSS

webix.protoUI({
    name:"selector",
    $cssName:"combo",
    $init:function(config){
         config.options = ["One", "Two", "Three"];
    }
}, webix.ui.combo);

2. Defining class name:

<div class="webix_view webix_control webix_el_{name}"</div>...</div>

webix_el_selector

webix_el_combo

Tips

  • modify config on $init, not with dynamic methods
  • don't use HTML containers for child Webix views
$init:function(config){
    config.cols = [
        { template:"Column 1" }, 
        { template:"Column 2" }
    ]
}

webix.protoUI({
    name:"myView",
    $init:function(config){
      webix.ajax(url).then((text, data) => {
        webix.ui(data.json(), this);
      });
  }
}, webix.ui.view);

View Life Cycle

  • DOM ready
  • View created
  • Added to DOM

fully or patrially

(multiview, data widgets)

  • Actions performed

DOM changes

  • Destroyed

by user, on unload

webix.ready(function(){

      webix.ui(...);

});

onAterRender, view.config.ready

  • View instantiated

view.$init, view.$ready

View Destruction

How

What happens

  • removeView()
  • close()
  • resizes neighbors
  • removes HTML artefacts
  • child views
  • related popups
  • pointers to HTML and data
  • focus 
  • destructor()

Final Destruction

  • window.unload
  • views are destroyed
  • events detached and removed

Useful Links

Follow-up text: click here

Task for practice: click here

Webix Topics:

2-1. Webix intermediate. View Essentials.

By ihelga

Made with Slides.com

2-1. Webix intermediate. View Essentials.

Views, mixins, inheritence. Creating custom widgets.

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