Multiple items visible and invisible depending on observable - javascript

I have two items that should be visible only when a given observable evaluates to false, and one item that should be visible when the same item evaluates to true. It works fine if I only have two items whose visibility depends on the observable. However, when a third item is introduced, it stops working.
ViewModel:
var viewModel = {
editable: ko.observable(false),
edit: function () {
this.editable(true);
},
delete: function () {
this.editable(true);
},
cancel: function () {
this.editable(false);
},
save: function () {
this.editable(false);
}
};
ko.applyBindings(viewModel);
A fiddle is available here: http://jsfiddle.net/mupersan82/Y6eKS/10/
The fiddle is working. Uncomment one of the "button" items to see the problem.
Can anyone identify what the problem is?
Regards, Anders

delete is a Javascript operator and therefore a reserved word (see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/delete). Renaming the function fixes it:
var viewModel = {
editable: ko.observable(false),
edit: function () {
this.editable(true);
},
remove: function () {
this.editable(true);
},
cancel: function () {
this.editable(false);
},
save: function () {
this.editable(false);
}
};
ko.applyBindings(viewModel);
(fiddle: http://jsfiddle.net/Y6eKS/11/)

Related

AutoComplete with Key-Value in grid, showing key when focus

I am using paramquery grid component in which I am trying to use autocomplete.
Column Model for branch:
{ title: "Branch", dataIndx: "branchId", width: 150,
filter: { type: "select",
condition: 'equal',
prepend: { '': '--All--' },
listeners: ['change'],
valueIndx: "branchId",
labelIndx: "branchName",
options: branchList,
},
editor: {
type: "textbox",
init: autoCompleteEditor
//type: function (ui) { return dropdowneditor(this, ui); }
},
render: function (ui) {
for (var i = 0; i < branchList.length; i++) {
var option = branchList[i];
if (option.branchId == ui.rowData.branchId) {
return option.branchName;
}
}
}
}
autoCompleteEditorMethod:
var autoCompleteEditor = function (ui) {
var $inp = ui.$cell.find("input");
//initialize the editor
$inp.autocomplete({
source: function(request, response) {
var rows = imAutocompleteJSONParse(branchList);// this method converting my JSON object into Value and label format.
return response(rows);
},
selectItem: { on: true }, //custom option
highlightText: { on: true }, //custom option
minLength: 0,
select: function(event, ui) {
event.preventDefault();
$(this).val(ui.item.label);
},
focus: function(event, ui) {
event.preventDefault();
$("#search").val(ui.item.label);
}
}).focus(function () {
//open the autocomplete upon focus
$(this).autocomplete("search", "");
});
}
I get branch id into my grid and I have branchList JSON which have branch id & branch Name. Inside grid my render function showing branchName on UI.
But when I click on searchable dropdown I'm getting branch id.
Below snapshot may explain my issue properly.
Summary of issue: I am getting branch id in Grid. With help of render method I am able to show branch name on grid. but when I click on textbox I getting branch id.
http://jsfiddle.net/v4zx8tjc/4/
Like blackmiaool suggests in his comment, this question would be easier to answer with a live demo using something like JSFiddle.
Based on what I can see in your question, which isn't that much, there are a few areas I would take a second look at.
The Source function in JQuery.autoComplete. Where is branchList coming from? I don't see it declared anywhere and why are you not using the 'request' param?
Not sure what your custom properties are doing but it might be a good idea to verify those are not interfering with the results.
Edit 1: Looking back at the code you posted I think I see where your branchList variable is coming from. It would be very helpful to see your imAutocompleteJSONParse() method because I believe that may be where things are breaking down.

CollapseSidebar is not a function

I am writing a script for a project, it has a function to collapse or open the sidebar on click on hamdurger icon but when I click it gives me error
TypeError: this.CollapseSidebar is not a function
The following is my code:
(function($) {
'use strict';
var Prtm = {
Constants: {
LEFTMARGIN:'315px',
COLLAPSELEFTMARGIN: '63px',
},
PrtmEle:{
BODY: $('body'),
SIDEBAR: $('.prtm-sidebar'),
SIDENAV: $('.sidebar-nav'),
MAIN: $('.prtm-main'),
HEADER: $('.prtm-header'),
CONTENTWRAP: $('.prtm-content-wrapper'),
CONTENT: $('.prtm-content'),
PRTMBLOCK: $('.prtm-block'),
FOOTER: $('.prtm-footer'),
HAMBURGER: $('.prtm-bars'),
},
Init:function(){
this.BindEvents();
},
BindEvents:function(){
this.PrtmEle.BODY.on('click',this.PrtmEle.HAMBURGER,function(){
this.CollapseSidebar();
});
},
CollapseSidebar: function(){
this.PrtmEle.HAMBURGER.toggleClass("prtm-sidebar-closed is-active");
this.PrtmEle.BODY.toggleClass("prtm-sidebar-closed is-active");
this.PrtmEle.SIDEBAR.toggleClass('collapse');
},
};
Prtm.Init();
})(jQuery);
When I change this.CollapseSidebar to Prtm.CollapseSidebar it works properly. What I am doing wrong here and how it can be resolved?
Why it do not work? Because a function() binds its own this.
One thing you can do is to use Arrow function which do not bind its own this - like this:
BindEvents:function(){
this.PrtmEle.BODY.on('click',this.PrtmEle.HAMBURGER,() => {
this.CollapseSidebar();
});
}
Inside you click function this will refer to the window - so either you can create a temporary variable like the below or use the arrow function:
BindEvents:function() {
let $this = this;
this.PrtmEle.BODY.on('click',this.PrtmEle.HAMBURGER,function() {
$this.CollapseSidebar();
});
}

How do I combine my backbonejs view with jquery

Backbonejs.org says
"— while very deliberately avoiding painting you into a corner by making any decisions that you're better equipped to make yourself."
So I have a BackBone view like this:
var LotsaToys= Backbone.View.extend({
el: '#CaveToy',
events: {
'click .slide': 'slideAnimal'
},
initialize: function (obj) {
this.collection = new Yoyo(obj);
this.render();
},
render: function () {
this.collection.each(function (item) {
this.renderToy(item);
}, this);
},
renderBook: function (item) {
var ToyView = new oneToy({
model: item
});
this.$el.append(ToyView .render().el);
}
});
And simple Jquery code like this:
$(document).ready(function () {
var sudoSlider = $("#slider").sudoSlider({
vertical: true,
continuous: false
});
});
Do I combine these to by simply adding the JQuery code in the slide function?
(Simple Jquery image slider)
slideAnimal: function (event) {
$(document).ready(function () {
var sudoSlider = $("#slider").sudoSlider({
vertical: true,
continuous: false
});
});
});
Im a noob, so please give me a explanation ,not sure what way is 'good practice' or what way would be better to implement..
You need place it after render
render: function () {
this.collection.each(function (item) {
this.renderToy(item);
}, this);
this.slideAnimal();
},
slideAnimal: function() {
this.$("#slider").sudoSlider({
vertical: true,
continuous: false
});
}

Why won't my jQuery-ui modal dialog display two custom buttons?

I have a generic Javascript function for displaying a jQuery-ui modal dialog with two buttons -- essentially "Continue" and "Cancel", though the text varies. I'm calling it in three places in my application. What's happening is that only the second button, the "Cancel" button is being displayed. Here's the function: (String.Format is an external function I always use since Javascript doesn't have one built-in - I know it isn't the problem.)
function DisplayModalDialog(titleText, bodyText, continueText, cancelText) {
//add the dialog div to the page
$('body').append(String.Format("<div id='theDialog' title='{0}'><p>{1}</p></div>", titleText, bodyText));
//create the dialog
$('#theDialog').dialog({
width: 400,
height: "auto",
modal: true,
resizable: false,
draggable: false,
close: function (event, ui) {
$('body').find('#theDialog').remove();
$('body').find('#theDialog').destroy();
},
buttons: [
{
text: continueText,
click: function () {
$(this).dialog('close');
return true;
},
text: cancelText,
click: function () {
$(this).dialog('close');
return false;
}
}]
});
return false;
}
And here's a snippet showing how I'm calling it:
if(CheckFormDataChanged() {
var changeTitle = "Data has been changed";
var changeText = "You have updated information on this form. Are you sure you wish to continue without saving?";
var changeContinue = "Yes, continue without saving";
var changeCancel = "No, let me save";
if (DisplayModalDialog(changeTitle, changeText, changeContinue, changeCancel)) {
if (obj) obj.click();
return true;
}
}
What's wrong with my function (or the call)?
UPDATE: Here's what I'm working with now. I realized that on one of the modal dialogs I didn't need a cancel button, just an acknowledge button:
function DisplayModalDialog(titleText, bodyText, continueText, cancelText, suppressCancel) {
var def = new $.Deferred();
//add the dialog div to the page
$('body').append(String.Format("<div id='theDialog' title='{0}'><p>{1}</p></div>", titleText, bodyText));
//create the button array for the dialog
var buttonArray = [];
buttonArray.push({ text: continueText, click: function () { $(this).dialog('close'); def.resolve(); } });
if (!suppressCancel) {
buttonArray.push({ text: cancelText, click: function () { $(this).dialog('close'); def.reject(); } });
}
//create the dialog
$('#theDialog').dialog({
... dialog options ...
close: function (event, ui) { $('body').find('#theDialog').remove(); },
buttons: buttonArray
});
return def.promise();
}
And the usage:
DisplayModalDialog(changeTitle, changeText, changeContinue, changeCancel, false)
.done(function () { if (obj) obj.click(); return true; })
.fail(function () { return false; });
Just to give you some context, obj is an ASP.Net Button being passed to the client-side function; if the function returns true, the server-side OnClick event is triggered; if false, it isn't. In this case, the server-side OnClick advances to the next tab in a TabContainer (among other things). What's happening is that it's moving to the next tab anyway, even though I'm returning false in the fail() function.
Your curly braces are off:
[{
text: continueText,
click: function () {
$(this).dialog('close');
return true;
}
}, {
text: cancelText,
click: function () {
$(this).dialog('close');
return false;
}
}]
As you have it, you only have one object in your buttons array.
I can't tell yet why the button doesn't display EDIT, ah, yes I can, there's a missing curly brace.
What I can tell you that your return lines simply won't work.
The dialog box gets displayed, your function returns immediately, and processing continues, so the click callback return values are completely ignored.
What you can do instead is return a promise:
function DisplayModalDialog(titleText, bodyText, continueText, cancelText) {
var def = $.Deferred();
...
buttons: [
{
text: continueText,
click: function () {
$(this).dialog('close');
def.resolve();
}
},
{ // ah - here's your button bug - a missing brace
text: cancelText,
click: function () {
$(this).dialog('close');
def.reject();
}
}
...
return def.promise();
}
with usage:
DisplayModalDialog(changeTitle, changeText, changeContinue, changeCancel)
.done(function() {
// continue was clicked
}).fail(function() {
// cancel was clicked
});

Calling functions with click handlers in ExtJS 4

I have a function inside a toolbar, let's call it:
Ext.define('MyArchive.Toolbar', {
search: function() {
console.log('searching');
}
}
Now I'd like to call this function when clicking a button. So I'm adding some click handlers in the afterRender on the toolbar setup:
afterRender: function() {
Ext.getCmp('search-button').on('click', this.search);
}
However, this doesn't work and I ultimately need to go the full route of:
afterRender: function() {
Ext.getCmp('search-button').on('click', function() {
quick_search();
)};
}
Any particular reason why my first attempt doesn't apply the click handler as I expect?
Thanks for any explanations or refactorings! Additional patterns/idioms welcome...
Next try:
var panelOverall = new Ext.form.FormPanel({
html: 'bla',
search: function() {
console.log('searching');
},
buttons: [
{
text: 'Moo',
id: 'button1',
handler: function(){
//window.destroy();
}
}
],
afterRender: function() {
Ext.getCmp('button1').on('click', this.search);
}
});
is working for me.. am I missing something?

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