If I have a list on a page, and it is using knockout's foreach binding to display list items, then something else updates the DOM to add an extra list item. If there any way I can get knockout to detect that DOM change and update its model to add the new item to the observableArray?
Here is a fiddle which shows the problem...
http://jsfiddle.net/BGdWN/1/
function MyViewModel() {
this.items = ko.observableArray([
{ name: 'Alpha' }, { name: 'Beta' }, { name: 'Gamma' }, { name: 'Delta' }
]);
this.simpleShuffle = function() {
this.items.sort(function() {
return Math.random() - 0.5; // Random order
});
};
this.simpleAdd = function() {
$("#top").append("<li>New item</li>");
}
}
ko.applyBindings(new MyViewModel());
It has 2 lists bound to the same observableArray, click the addItem button and you can see that the DOM is updated to include the new list item in the top list, but I would like the second list to be updated too, all via the model.
It seems that knockout ignores DOM elements that it didnt render, you can see this by clicking the shuffle button, it leaves the new items there. I would have expected it to remove them and do a full re-render.
Please don't answer with "Just add the item to the observableArray"
Take a look at the first link and the second link Interface MutationEvent
See Fiddle
$('#top').bind('DOMNodeInserted DOMNodeRemoved', function () {
alert('Changed');
});
I hope it helps.
Related
Is it possible to set the background color for a row in slickgrid (based on data values) AND use pagination? For angular-slickgrid package.
I used getItemMetadata as suggested multiple other (old) posts - example SlickGrid: How to loop through each row and set color based on the condition?.
This code:
metadata(old_metadata_provider) {
return function(row) {
var item = this.getItem(row);
var ret = (old_metadata_provider(row) || {});
if (item) {
ret.cssClasses = (ret.cssClasses || '');
if ("attribute" in item) {
return { cssClasses: 'redRow' }; //redRow is in styles.css
}
}
return ret;
}
}
and the call is:
this.dataViewObj.getItemMetadata = this.metadata(this.dataViewObj.getItemMetadata);
It works correctly. However, when I turn pagination on, the color does not work as expected. I read that SlickGrid re-uses the same row elements when scrolling or paginating and will overwrite the styles associated with them. Is there another way to do it? Thanks for any help on this.
I tried adding the following code, after reading suggestion from ghiscoding, but the colors are still not working when pagination is enabled.
angularGridReady(angularGrid: AngularGridInstance) {
this.angularGrid = angularGrid;
this.dataViewObj = angularGrid.dataView;
this.gridObj = angularGrid.slickGrid;
this.checkRowBackgroundColor(); //where I call the metadata function from my previous post, if the dataView object is defined.
//I added this code:
var self = this;
this.dataViewObj.onPagingInfoChanged.subscribe(function (e, dataView, grid) {
self.gridObj.invalidate();
self.gridObj.render();
});
}
Try this approach:
angularGridReady(angularGrid: AngularGridInstance) {
this.angularGrid = angularGrid;
this.dataViewObj = angularGrid.dataView;
this.gridObj = angularGrid.slickGrid;
// check color change logic for the first time page load
this.checkRowBackgroundColor();
// use arrow function so that 'this' works properly
this.dataViewObj.onPagingInfoChanged.subscribe((e, dataView, grid) => {
// check your color change logic every time Paging Info Changed
this.checkRowBackgroundColor();
});
}
Inside your checkRowBackgroundColor:
checkRowBackgroundColor() {
// ... any of your logic
// get metadata
this.dataViewObj.getItemMetadata = this.metadata(this.dataViewObj.getItemMetadata);
// rerender the grid after getting new metadata
this.gridObj.invalidate();
this.gridObj.render();
}
Your problem should be solved now. As I have not tested on my local machine, I can not give guarantee. You can checkout original documentation of angular-slickgrid about this specific topic here: Dynamically Add CSS Classes to Item Rows
I am trying to select events on fullcalendar, based on user selection.
Example: if user selects class A, then all classes with the same ID should turn green (using applied className).
I am having trouble applying classes to the other events that I can successfully select by ID. I guess my issue is combining the event objects with jQuery objects.
sample code:
eventClick: function(event) {
$(this).addClass("reg_selected"); //this works fine on selected event
var selectedID = event.id
alert(selectedID); //get event.ID, and use it to find similar ones.
var similarEvents = $("#calendar").fullCalendar('clientEvents',selectedID).addClass("reg_selected");
the error I get is:
addClass is not a function
I also tried this method of looping, and got the same error:
for (var i = 0; similarEvents.length > i ; i++){
alert(similarEvents[i].title);
similarEvents[i].className("reg_selected");
}
the alert() worked, but the className() generated the same error as above
This answer for a very similar situation, but when event classes are selected with round-trip to the event source for possible persistence in the db or checks.
Class name can be specified in the event object in the source as follows (start and end given for the context only):
[{
...
"className": "selected-event",
"start": '2017-05-01T08:30:00.0',
"ends": '2017-05-01T09:00:00.0',
...
}, ...]
The idea is that user clicks the event; ajax call to select events goes to backend; onsuccess, frontend javascript does$calendar.fullCalendar('rerenderEvents'); and receives the event source with events' classes. The immediate child of .fc-event-container gets the specified class, in the example above - selected-event.
As a result, the selection can be persisted on the backend.
clientEvents returns an array of matching objects. You need to iterate through the array (in your case similarEvents) and call addClass for each item
Update:
There is also issues using an id to update multiple events, using a filter function instead is a better way to go.
eventClick: function(event) {
var similarEvents = $("#calendar").fullCalendar('clientEvents', function(e) { return e.test === event.test });
for (var i = 0; similarEvents.length > i ; i++){
similarEvents[i].className = 'reg_selected';
$('#calendar').fullCalendar('updateEvent', similarEvents[i]);
}
},
See jsfiddle
For fullcalendar add event class, id and title see this.
if($('#eventTitle').val() == "Avilable") {
eventClass = "avilable";
}else {
eventClass = "unavilable";
}
$myCalendar.fullCalendar('renderEvent', {
id:response,
title: title.val(),
start: start.val(),
end: end.val(),
allDay: true,
className: eventClass,
color: color
}, true
);
I was able to get it working with the following code:
eventRender: function (eventObj, $el) {
$el.addClass(eventObj.ClassName);
},
eventObj.ClassName = "calendar-priority-warning"
I'm using the Vitrux theme in Wordpress that uses Isotope jQuery plugin to display a work porfolio. Isotope allows categories to be used to sort the items, but within the theme it's only possible to sort by one category at a time (e.g. 'Year' or 'Type', not 'Year' and 'Type'.
You can see a mock-up here: http://snaprockandpop.samcampsall.co.uk/shoots/
The jQuery attached to each category item, that sorts the posts, is as follows:
function (){
var selector = $(this).attr('data-filter');
$container_isotope.isotope({ filter: selector });
var $parent = $(this).parents(".filter_list");
$parent.find(".active").removeClass('active');
$(".filter_list").not($parent).find("li").removeClass('active').first().addClass("active");
$(this).parent().addClass("active");
return false;
}
I can see from the Isotope site that it's possible to use multiple filters, and I've found the authors notes on this here: http://jsfiddle.net/desandro/pJ6W8/31/
EDIT:
Editing the theme files has allowed me to assign appropriate classes and properties to the filter lists (you can see these in the page source) and I'm targeting them through an edited version of the jsfiddle to reflect the classes and id's in the theme styling:
$( function() {
var $container = $('#portfolio_container');
$container.isotope({
animationOptions: { duration: 300, easing: 'linear', queue: false },
getSortData : {
year : function ( $elem ) { return parseFloat( $elem.find('._year').text() ); },
live-shows : function ( $elem ) { return parseFloat( $elem.find('._live-shows').text() ); }
}
});
var filters = {};
$('.ql_filter a').click(function(){
var $this = $(this);
if ( $this.hasClass('selected') ) {
return;
}
var $optionSet = $this.parents('.filter_list');
$optionSet.find('.active').removeClass('active');
$this.addClass('active');
var group = $optionSet.attr('data-filter-group');
filters[ group ] = $this.attr('data-filter');
var isoFilters = [];
for ( var prop in filters ) {
isoFilters.push( filters[ prop ] )
}
var selector = isoFilters.join('');
$container.isotope({ filter: selector });
return false;
});
});
Two (fairly major) things:
1) I'm not 100% that I've edited this correctly. Despite Rich's excellent comments I'm still out of my depth. I'm particularly not clear on how to set-up the 'getSortData' section - I think it's right but any input would be great.
2) I'm not sure that this JavaScript is being initiated. At the moment I've placed it immediately before the closing head tag but a check on the page suggests that the original script outlined above is the one running on the filter items.
Any pointers at this stage would be fantastic!
I see what you mean. You are looking for the intersection of both filters and not the mutually exclusive filter values.
Short answer: Contact the theme vendor and see if they can make the intersection filters for you.
Longer assistance (not an answer):
Your ultimate goal is to get the Vitrux theme working the way you want.
Your first goal is to understand what the jsfiddle code is doing.
I can handle your first goal by explicating the code.
// hook into the JQuery Document Load event and run an anonymous function
$( function() {
// Create a variable called container
// make container refer to the element with ID Container
var $container = $('#container');
// initialize isotope
// Call the isotope method on the container element
$container.isotope({
// options...
//distracting options
animationOptions: { duration: 300, easing: 'linear', queue: false },
getSortData : {
price : function ( $elem ) { return parseFloat( $elem.find('.price').text() ); },
size : function ( $elem ) { return parseFloat( $elem.find('.size').text() ); }
}
});
// sorting button
//for the anchor tag that has a class of 'pricelow', wire up an anonymous function to the click event
$('a.pricelow').click(function(){
//Rerun the isotope method when it is clicked, pass an array of options as a parameter
$('#container').isotope({ sortBy : 'price',sortAscending : true });
//return false for the anonymous function. Not 100% sure why this is necessary but it has bitten me before
return false;
});
//removed the rest of the click methods, because it does the same thing with different params
//Here is what you are interested in understanding
//Create an empty filters object
var filters = {};
// filter buttons
//When an anchor tag with class filters is clicked, run our anonymous function
$('.filters a').click(function(){
//Create a variable that is the action anchor element
var $this = $(this);
// don't proceed if already selected by checking if a class of "selected" has already been applied to the anchor
if ( $this.hasClass('selected') ) {
return;
}
//Create an optionSet Variable, point it to the anchor's parent's class of "option-set"
var $optionSet = $this.parents('.option-set');
// change selected class
//Inside the optionSet, find elements that match the "selected" class and then remove the "selected class"
$optionSet.find('.selected').removeClass('selected');
// set this (the anchor element) class to "selected"
$this.addClass('selected');
// store filter value in object
// create a variable called 'group' that points to the optionsSet variable and grab the data-filter-group expando attribute
var group = $optionSet.attr('data-filter-group');
//Append to the filters object at the top of this section and set the data-filter-group value to the anchor tag's data-filter value
filters[ group ] = $this.attr('data-filter');
//create an isoFilters array variable
var isoFilters = [];
//Loop through each one of the items in filters (give the item an alias variable called 'prop'
for ( var prop in filters ) {
//push the prop into the isoFilters array (the opposite is pop)
isoFilters.push( filters[ prop ] )
//keep looping until there are no more items in the object
}
//create a variable called selector and turn the array into a string by joining all of the arrays together
var selector = isoFilters.join('');
//Like always, call the 'isotope' method of the 'container' element and pass our newly concatenated 'selector' string as the 'filter' option.
$container.isotope({ filter: selector });
//return false for some reason (maybe someone can expand on that)
return false;
});
});
Next is your ultimate goal which is modifying the Vitrux theme to handle intersection filters.
This gets a little tricky because
You have automatically generated tags from PHP to create the category links and the Year filter. So, there will be definitely some PHP code changes.
You must convert the jsfiddle code to handle your PHP changes
Try it using jQuery noconflict. In effect, replace any "$" with "jQuery" and see if it works.
Wordpress doesn't play well with the dollar sign.
Can someone please throw some light on how to go about rendering an hyperlink in the cells of a particular column in ExtJS?
I have tried binding the column to a render function in my JS, from which I send back the html:
SELECT
However, with this, the problem is that, once I hit the controller through the link, the navigation is successful, but subsequent navigations to the data-grid show up only empty records.
The records get fetched from the DB successfully through the Spring MVC controller, I have checked.
Please note that this happens only once I use the row hyperlink in the extJS grid to navigate away from the grid. If I come to the grid, and navigate elsewhere and again come back to the grid, the data is displayed fine.
The problem only occurs in case of navigating away from the grid, using the hyperlink rendered in one/any of the cells.
Thanks for your help!
This is for ExtJS 4 and 5.
Use a renderer to make the contents look like a link:
renderer: function (value) {
return ''+value+'';
}
Then use the undocumented, dynamically generated View event cellclick to process the click:
viewConfig: {
listeners: {
cellclick: function (view, cell, cellIndex, record, row, rowIndex, e) {
var linkClicked = (e.target.tagName == 'A');
var clickedDataIndex =
view.panel.headerCt.getHeaderAtIndex(cellIndex).dataIndex;
if (linkClicked && clickedDataIndex == '...') {
alert(record.get('id'));
}
}
}
}
Try something like this:
Ext.define('Names', {
extend: 'Ext.data.Model',
fields: [
{ type: 'string', name: 'Id' },
{ type: 'string', name: 'Link' },
{ type: 'string', name: 'Name' }
]
});
var grid = Ext.create('Ext.grid.Panel', {
store: store,
columns: [
{
text: 'Id',
dataIndex: 'Id'
},
{
text: 'Name',
dataIndex: 'Name',
renderer: function (val, meta, record) {
return '' + val + '';
}
}
...
...
...
However my thanks to - ExtJS Data Grid Column renderer to have multiple values
Instead of using an anchor tag, I would probably use plain cell content styled to look like an anchor (using basic CSS) and handle the cellclick event of the GridPanel to handle the action. This avoids dealing with the anchor's default click behavior reloading the page (which is what I'm assuming is happening).
I created a renderer so it looked like you were clicking on it.
aRenderer: function (val, metaData, record, rowIndex, colIndex, store){
// Using CellClick to invoke
return "<a>View</a>";
},
But I used a cell event to manage the click.
cellclick: {
fn: function (o, idx, column, e) {
if (column == 1) // Doesn't prevent the user from moving the column
{
var store = o.getStore();
var record = store.getAt(idx);
// Do work
}
}
}
For these purposes I use CellActions or RowActions plugin depending on what I actually need and handle cell click through it.
If you want something that looks like an anchor, use <span> instead and do what #bmoeskau suggested.
You can use 'renderer' function to include any HTML you want into cell.
Thanks guys for your response.
AFter debugging the extJS-all.js script, I found the issue to be on the server side.
In my Spring MVC controller, I was setting the model to the session, which in the use-case I mentioned earlier, used to reset the "totalProperty" of Ext.data.XmlStore to 0, and hence subsequent hits to the grid, used to display empty records.
This is because, ext-JS grid, checks the "totalProperty" value, before it even iterates through the records from the dataStore. In my case, the dataStore had data, but the size was reset to null, and hence the issue showed up.
Thanks to all again for your inputs!
I have a dojo grid which is using some editable dijit form fields. All is well, until I try ot implement an country (multi) select cell as an Tooltip Dialog; i.e., show a drop down button which opens the tooltip dialog populated with a checkbox array to select one or more country. Once checked and clicked OK, the cell should update with a list of selected countries. Obviously I'll take care of updating the server via the store later on.
I've implemented a country select tooltip dialog which works fine like so:
dojo.provide("CountrySelector");
dojo.declare(
"CountrySelector",
[dijit.form.DropDownButton],
{
label: 'Countries',
dropDown: new dijit.TooltipDialog({ execute: function() {
console.log("EXECUTE : ", arguments[0]);
this.value = arguments[0].country;
}, href:'/cm/ui/countries' }),
postCreate: function() {
this.inherited(arguments);
this.label = this.value;
dojo.connect(this.dropDown, 'onClose', function() { console.log('close'); });
console.log("CountrySelect post create", this);
},
}
);
And the grid cell is typed as:
{ name: 'Countries', field: 'targeting.countries', editable: true, hidden: false, type:dojox.grid.cells._Widget, widgetClass: CountrySelector },
All is working fine but I can't figure out how to update cell's content and store once the widget is executed. As well, I don't seem to have the row id of the updated row.
Any ideas?
Thanks,
Harel
//Layout:
gridLayout: {rows: [{name: 'Coll Name',field: 'colField', type: dojox.grid.cells.ComboBox, editable:'true', width:'8%',options: [], alwaysEditing:false}]}
//Grid Store:
this.gridStore = new dojo.data.ItemFileReadStore({data: {items: data}});
//
var setOptions = function(items, request){
this.gridLayout.rows[0].options.push('Val 1','Val 2');
this.gridLayout.rows[0].values.push('1','2');
dojo.connect(this.gridLayout.rows[0].type.prototype.widgetClass.prototype, "onChange",this, "_onComboChange");
}
this.gridStore.fetch({onComplete: dojo.hitch(this,setOptions)});
_onComboChange: function (selectedOption) {
console.info("_onComboChange: ",selectedOption);
},
// If you need to populate combos with different values you can use onItem
var getArray = function(item, request){
// populate one by one
// attach an event to each combo
}
this.gridStore.fetch({onItem: dojo.hitch(this,getArray)});
This is what i used to update my grid
var idx = yourGrid.getItemIndex(item);
if (idx >- 1) {
yourGrid.updateRow(idx);
}
More detail
every row is identified by its identifier
yourGrid.store.fetchItemByIdentity({
identity: <yourIdentity>,
onItem: function(item){
// Update your attributes in the store depending on the server response
// yourGrid.store.setValue(item, <attribute>,<value>);
var idx = yourGrid.getItemIndex(item);
if (idx >- 1) {
yourGrid.updateRow(idx);
}
}
});
I didn't set up a test with your code but you should be able to do it by just creating a method named getValue in your widget that returns the value.
Take a look at the other examples (like dojox.grid.cells.ComboBox) to get an idea of what getValue should look like.