Am working on simple turn based game using WPF and ReactiveUI? I am very new to Reactive UI/Reactive Extensions.
On a particular View, I have 3 buttons, say "Kick", "Punch", "Run Away".
On clicking any of these buttons, It will call either, the Kick, Punch or RunAway functions of the Fight Class, all of which return a string, which I display on the view.
this.KickCommand = ReactiveCommand.CreateCommand();
this.KickCommand.Subscribe(x =>
{
this.Message = this.Fight.Kick();
});
Similarly, I have remaining Commands.
I would like to do the following.
When a Command is triggered I want all the commands to be disabled for duration of 2 seconds, while the message is being displayed and then after two seconds the message is cleared out and the command are enabled again.
Thanks in advance.
Here one way to do it, with comments:
var canExecute = new Subject<bool>();
KickCommand = ReactiveCommand.Create(canExecute);
PunchCommand = ReactiveCommand.Create(canExecute);
RunAwayCommand = ReactiveCommand.Create(canExecute);
new[] { KickCommand, PunchCommand, RunAwayCommand }.Select(cmd => {
// skip the initial false, we don't want to delay that one
var isExec = cmd.IsExecuting.Skip(1);
// delay re-activation (falses) by 2s
return new[] { isExec.Where(x => x), isExec.Where(x => !x).Delay(TimeSpan.FromSeconds(2)) }.Merge()
// add back an initial false
.StartWith(false);
})
// all commands needs to be in this non-executing-since-2s state
.CombineLatest(l => l.All(x => !x))
.ObserveOn(RxApp.MainThreadScheduler)
.Do(ClearMessageIfTrue)
.Subscribe(canExecute);
I skipped the command subscribe parts as you seem to already have that one.
Related
I'm building up a user profile that has some addresses, the user can edit them, it's almost finished, but I'm stuck in setting the user edit address in a form.
Just like it shows in the GIF when I click the button no value is set, I'm using react-hook-form to build these forms.
This is the function that execute when I click on the button:
const editAddress = (i) => {
const addressClicked = addressList[i];
console.log(addressWatch());
setAddressValue("name", addressClicked);
setShowForm(true);
};
addressList is an array that is being looped, and then I get the key from the .map(v,i) and it returns an object with all the information that should populate the input fields for the user to edit it.
So, in the docs there is a function that is called "reset" that actually does exactly what I wanted, it wipes the current data from the form and it can replace with a new object data.
https://react-hook-form.com/api/useform/reset
The function looks like this now
const editAddress = (i) => {
const addressClicked = addressList[i];
addressReset(addressClicked);
setShowForm(true);
};
I have tabs with forms and I want ask the user to confirm or discard their changes when changing tabs. My current code works
<uib-tab heading="..." index="3" deselect="main.onDeselect($event)" ... >
this.onDeselect = function($event) {
if(...isDirty...) {
if($window.confirm("Do you want to discard?")) {
... discard (and go to new tab) ...
} else {
$event.preventDefault(); //stays on current tab
}
}
}
The problem is I want to change confirm to javascript dialog and I will get result in callback.
I planed to preventDefault() all and then switch manually, but I cannot figure out where to get new tab id.
Any solution is appreciated. Even if it is easier in other tab implementations.
I use AngularJS v1.4.7, ui-bootstrap-tpls-1.3.3.min.js
You can make use of $selectedIndex and the active property for that purpose. See this Plunk
One thing to be noted here is that when we manually change the active property, it again fires the deselect event which needed to be handled. Otherwise it seems to do what you wanted.
Edit
Indeed as noted in the comments, the deselect carries the HTML index rather than what is passed in in the tab index property. A workaround could be in this: Another Plunk. Here I'm pulling the actual index from the HTML index.
And a little research indicates that this issue might as well be fixed already with 3.0 bootstrap tpl See this.
I spent some time with different approaches and this one is stable for some time. What I do is to prevent deselect at the beginning and set the new tab in callback if confirmed to loose changes...
this.onDeselect = function($event, $selectedIndex) {
var me = this;
if(this.tabs.eventDirty || this.tabs.locationDirty || this.tabs.contractDirty) {
$event.preventDefault();
var alert = $mdDialog.confirm({
title: 'Upozornění',
textContent: 'Na záložce jsou neuložené změny. Přejete si tyto změny zrušit a přejít na novou záložku?',
ok: 'Přijít o změny',
cancel: 'Zůstat na záložce'
});
$mdDialog
.show( alert )
.then(function() {
$rootScope.$emit("discardChanges");
me.tabs.activeTab = $selectedIndex;
})
}
};
I need to get(retrieve) updated cell value in controller. (MVC)
So I tried this,
var modified = this.getItemGrid().getStore().getUpdatedRecords();
console.log(modified); // return [] empty array
var modified = this.getItemList_Store().getUpdatedRecords();
console.log(modified); // return [] empty array
but always it returns empty array even I updated some cell value.
anybody know what I am doing wrong?
Here is my part of view code,
Ext.define("App.view.orders.ItemList_view", {
extend: "Ext.grid.Panel",
alias: "widget.itemList_view",
plugins: [
Ext.create('Ext.grid.plugin.CellEditing', {
clicksToEdit: 1
})
],
initComponent: function () {
this.store = "ItemList_store";
this.columns = [
{
xtype: 'checkcolumn', text: "Ship", width: 50, dataIndex: "DR"
},
{ header: "test", width: 100, dataIndex: "test",
editor: {
xtype : 'textfield'
}
}
];
this.selModel = Ext.create("Ext.selection.CheckboxModel");
//this.selModel = Ext.create("Ext.selection.CellModel"); // It does not works either.
this.callParent(arguments);
},
.
.
.
Thank you!
[EDIT]
Thank you very much for your answer! I have some more question about editor grid.
Its much different from Ext3. so I'm very confusing now :(
Q1. How to collect edited record data (once click button)?
the event fired once the grid cell be changed.
but I want collect edited grid record once I click the 'Update edited cell' button, and I want to update all together at the once.
In Ext3, I did like this,
(button) click : function(){
var modified = mygridStore.getModifiedRecords();
var recordsToSend = [];
Ext.each(modified, function(record){
recordsToSend.push(record.data);
});
var grid = Ext.getCmp('grid');
grid.el.mask('Updating','x-mask-loading');
grid.stopEditing();
recordsToSend = Ext.encode(recordsToSend);
Ext.Ajax.request({
url : '/test/test',
params : {
data : recordsToSend
},
success : function(response){
grid.el.unmask();
alert(response.responseText);
mygridStore.commitChanges();
},
failure : function(response){
mygridStore.rejectChanges();
}
});
}
How can I change the code for Extjs4 ?
Q2. I don't know still how to find out for changed checkcolumn.
I tried this, but I does not work for checkcolumn (of cause I tested after change checkbox)
// grid coumn
{
xtype: 'checkcolumn', header: "My Check Column", width: 50, dataIndex: "CH"
}
-
// in control
'myGrid': {
validateedit: function (plugin, edit) {
console.log(edit);
},
checkchange: function (plugin, edit) {
console.log(edit);
console.log(edit.value);
}
}
Q3. When I click the cell to edit, the show some HTML tag in -_-;;
I really appreciate for your help. and thank you very much for your valuable time!
The editors (cell editors or row editors) do not commit their values to the store until you complete the edit - which means pressing ENTER or blurring the active cell editor by clicking elsewhere on the page, or clicking the save button on the row editor form .
If your purpose for reading the updated value in your editor is to perform some kind of validation I would suggest simply listening to the validateedit event in your grid's controller, as described here.
The second argument that this event passes to your handler contains a lot of data about the edit that you can then perform validation with. If the edit doesn't pass your validation you can return false from your handler and the value in the celleditor will revert to it's original value. The validateedit event gets fired from the editor grid itself so you would add an event handler in your controller for it like this:
Ext.define('MyApp.controller.MyController', {
init: function() {
this.control({
'mygridpanel': {
validateedit: function(plugin, edit) {
// silly validation function
if (edit.value != 'A Valid Value') {
return false;
}
},
},
});
},
});
But you should check out the link above to see all the different objects available in that second argument I named edit.
The validateedit event is fired right before the record is committed into the store - after the user has already clicked ENTER or blurred the editor, i.e., while the editor is closing.
If you are trying to get the celleditor's value before it starts to close, for some reason other than validation for example, you could get the active celleditor's value like this:
// myGrid is a reference to your Ext.grid.Panel instance
if (myGrid.editingPlugin.editing) {
var value = myGrid.editingPlugin.getActiveEditor().field.value
console.log('value: ' + value);
}
If there is no active editor then myGrid.editingPlugin.getActiveEditor().field would throw an error, that's why I wrapped a conditional around it.
One other point I should make, for validation in editor grids, I found that it is easiest to just put a validator config in the grid column's editor definition. That will give you all the handy validation CSS while the user is setting the field's value and alert him if there is a problem with the value before he tries to save it.
To get an idea of what I mean, try entering letters in the date column of this example. Mouse over the editor cell and you will get the error message.
EDIT
It seems I misunderstood you original question, I'll break down my answers to your questions above though,
Question 1
Once you have completed an edit (clicked ENTER or ), your call to mygridStore.getModifiedRecords() should be working fine because the record will have been committed to the store. I see that it was not working, I will cover that in a moment.
I should point out that ExtJS4 has a store.sync() method as covered here.
Instead of extracting the modified records from the store, encoding them, manually doing an ajax request to save them to the server and then manually committing them you can call this sync method and it will take care of all of these actions for you.
If you have different URLs to handle the different create, read, update, destroy operations fired off by your store's load and sync methods, you can use the store's proxy api config to map your URLs to these operations as covered here. Or you can set-up your server side controller to be able to differentiate between your store's load request (read operations default to HTTP GET) and it's sync requests (create, update and delete operations default as HTTP POST).
There could be many different ways to go about doing this on the server side, the way I usually do it is to have one SQL stored procedure for GET requests and one for POST requests for any given store. I include the store name as an extra param and then my server side controller runs the appropriate stored procedure based on whether it is a GET or a POST request.
Question 2
Cell editing doesn't support checkcolumn edits. You have to make a different handler to listen to changes on that, something like this:
checkchange: function (column, rowIndex, checked) {
var record = store.getAt(rowIndex),
state = checked ? 'checked' : 'unchecked'
console.log('The record:');
console.log(record)
console.log('Column: ' + column.dataIndex);
console.log('was just ' + state)
}
Your call to mygridStore.getModifiedRecords() should be able to pick up the check changes also however, they get committed to the grid's store right away after being checked. store.sync() would also pick up changes to checkcolumn.
Question 3
I can't completely tell what is causing that problem but it may be something strange going on with your validateedit event, your handler should be returning true or false.
As I said earlier, I misunderstood the reason you originally asked this question. I thought you were trying to do some kind of validation while an edit was in progress. Now I understand that you are trying to get all of the modified records from the store after all the editing is completed in order to save them to the database, I was thrown off because in ExtJS 4 a store is usually saved to the database with the sync method as I mentioned.
In other words, you don't need the validateedit event or checkchange event to get a list of modified records.
The actual problem you are having might be trouble with the store's getter methods (getModifiedRecords, getUpdatedRecords) in some 4.07 versions, take a look at this post and this one.
So with all that said, the best advice I can give you is 1) try out the stores sync method for saving modified data to the database and 2) upgrade to ExtJS 4.1, there were a lot of bugs that were straightened out between 4.07 and 4.1 which you should be able to take advantage of, I cut out about 75% of the overrides I was using to make things work when I switched over to 4.1.
EditedGrid.plugins[0].completeEdit();
This will make the active changes commit and call edit event also.
listeners: {
validateedit: function (editor, e) {
//console.log(editor);
var oldVal = editor.originalValue;
var newVal = editor.value;
}
}
I make this async webrequest call mutliple times(can be twice or thrice or even 6 times depending on conditions)
var request = HttpWebRequest.CreateHttp(url);
var observableRequest = Observable.FromAsyncPattern<WebResponse>(
request.BeginGetResponse, request.EndGetResponse);
Observable.Timeout(observableRequest.Invoke(), TimeSpan.FromSeconds(120)).
Subscribe(response => { HandleListResult(response); },
exception => { HandleListResultTimeOut(exception); });
I have a Collection (List) in the ViewModel which has a Binding to a LisBox and i would like to keep adding to the collection after each response returns.
What is the best practice to make this happen using Reactive Extensions ? Would be great if someone can show me some sample code !
Thanks in advance
You can translate url flow directly into streams:
public static IObservable<Stream> RequestToStream(
this IObservable<string> source, TimeSpan timeout)
{
return
from wc in source.Select(WebRequest.Create)
from s in Observable
.FromAsyncPattern<WebResponse>(wc.BeginGetResponse,
wc.EndGetResponse)()
.Timeout(timeout, Observable.Empty<WebResponse>())
.Catch(Observable.Empty<WebResponse>())
select s.GetResponseStream();
}
And then you need to observe your responces on UI, you need to use .ObserveOnDispatcher(), f.e.:
Observable
.Return("www.msdn.com")
.RequestToStream(TimeSpan.FromSeconds(1))
.ObserveOnDispatcher()
.Subscribe(request => UpdateUI(Request));
In ReactiveUI, this is done via CreateCollection()
IObservable<string> source; // Maybe this is a Subject<string> or whatever
myBoundCollection = source
.SelectMany(webServiceCall) // This is your FromAsyncPattern func
.CreateCollection(); // Pipe the Observable to a Collection
ReactiveUI handles all of the ObserveOn stuff to make sure it's synchronized and on the right threads, etc. This call returns immediately with an Empty list, then as results come in, the collection gets populated.
When adding a rows to a grid, and then clicking on it, it gets selected (and highlighted). Then, clicking elsewhere but the new row remains highlighted (so now there are to highlighted rows).
Please, does anyone know what the problem could be? How to make it behave normally, i.e. clicking a row deselects (de-highlights) the other one?
After I reload the page (so the new row is not new anymore), everything works as expected.
Edit: Here's the code for adding rows:
var rec = new store.recordType({
test: 'test'
});
store.add(rec);
Edit 2: The problem seems to be listful: true. If false, it works! But I need it to be true so I'm looking at this further... It looks like as if the IDs went somehow wrong... If the ID would change (I first create the record and then the server returns proper ID, that would also confuse the row selector, no?)
(Note, correct as ExtJS 3.3.1)
First of all, this is my quick and dirty hack. Coincidentally I have my CheckboxSelectionModel extended in my system:-
Kore.ux.grid.CheckboxSelectionModel = Ext.extend(Ext.grid.CheckboxSelectionModel, {
clearSelections : function(fast){
if(this.isLocked()){
return;
}
if(fast !== true){
var ds = this.grid.store,
s = this.selections;
s.each(function(r){
//Hack, ds.indexOfId(r.id) is not correct.
//Inherited problem from Store.reader.realize function
this.deselectRow(ds.indexOf(r));
//this.deselectRow(ds.indexOfId(r.id));
}, this);
s.clear();
}else{
this.selections.clear();
}
this.last = false;
}
});
And this is the place where the clearSelections fails. They try to deselect rows by using ds.indexOfId(r.id) and it will returns -1 because we do not have the index defined remapped.
And this is why we can't find the id:-
http://imageshack.us/photo/my-images/864/ssstore.gif/
Note that the first item in the image is not properly "remapped". This is because we have a problem in the "reMap" function in our Ext.data.Store, read as follow:-
// remap record ids in MixedCollection after records have been realized. #see Store#onCreateRecords, #see DataReader#realize
reMap : function(record) {
if (Ext.isArray(record)) {
for (var i = 0, len = record.length; i < len; i++) {
this.reMap(record[i]);
}
} else {
delete this.data.map[record._phid];
this.data.map[record.id] = record;
var index = this.data.keys.indexOf(record._phid);
this.data.keys.splice(index, 1, record.id);
delete record._phid;
}
}
Apparently, this method fails to get fired (or buggy). Traced further up, this method is called by Ext.data.Store.onCreateRecords
....
this.reader.realize(rs, data);
this.reMap(rs);
....
It does look fine on the first look, but when I trace rs and data, these data magically set to undefined after this.reader.realize function, and hence reMap could not map the phantom record back to the normal record.
I don't know what is wrong with this function, and I don't know how should I overwrite this function in my JsonReader. If any of you happen to be free, do help us trace up further for the culprit that causes this problem
Cheers
Lionel
Looks like to have multi select enabled for you grid. You can configure the selection model of the grid by using the Ext.grid.RowSelectionModel.
Set your selection model to single select by configuring the sm (selection model) in grid panel as show below:
sm: new Ext.grid.RowSelectionModel({singleSelect:true})
Update:
Try reloading the grid using the load method or loadData method of the grid's store. Are you updating the grid on the client side? then maybe you can use loadData method. If you are using to get data from remote.. you can use load method. I use load method to update my grid with new records (after some user actions like add,refresh etc). Or you could simply reload as follows:
grid.getStore().reload();