I'm building a Windows 8 Store app in HTML/JS which uses GeoNames & Mediawiki/Wikipedia APIs.
JSON Data from the GeoNames API is populated into a Listview. Oddly, the content in the listview refreshes on its own?
Does anyone have any pointers on what could be wrong?
This refresh happens once every minute. While I'm on any other item in the ListView than the first, the refresh forces back the focus to the very first item in the list view.
I'm using the Geolocator PositionChanged event. I've not set any value explicitly to the ReportInterval property of the Geolocator class.
This is because you have some code that is setting the itemDataSource on the ListView -- is this not because you have some long poll function that is completing, and setting the data again and again?
Related
CalendarViewDayItemChanging seems to be the way to add 'density colors' (coloured bars in a DayItem box) to a Windows Universal App CalendarView.
However CalendarViewDayItemChanging is only fired when the DayItem box is loaded i.e. on initial loading and possibly when navigating to a far enough date and back again such that the virtualisation re-loads the DayItem.
However when I create an appointment on the selected date I need to add a density color bar immediately, similarly if I remove an appointment, I need to remove that bar.
How do I get the control to reload or re-render that particular DayItem?
Notes:
There is only the SelectedDates available as a property
There is no obvious way to ge the DayItem collection
Setting the Visibility to Collapsed then Visible instantaneously does not trigger a reload.
There was a similar issue on the MSDN blogs here: https://social.msdn.microsoft.com/Forums/en-US/54c81ada-4147-474b-8425-524ec69bc749/uwp-calendarview?forum=wpdevelop
I think your best bet currently is to have your Appointment creation on a separate page and store a List of Appointments locally or in a db. That way when you navigate back to the Page with your calendar view you can reload the Calendar using the updated Appointment list.
I used the MyCalendarView.UpdateLayout method to force the control to hit the CalendarViewDayItemChanging event again.
I called the method from the DataContextChanged event on my UserControl. This way anytime I change the DataContext the density colors get updated. This is sufficient for my needs. It sounds like you want to do it on a different event.
private void UserControl_DataContextChanged(Windows.UI.Xaml.FrameworkElement sender, Windows.UI.Xaml.DataContextChangedEventArgs args)
{
if (this.DataContext is ObservableCollection<Event>)
{
eventCalendar.UpdateLayout();
}
}
I'm transitioning a corporate web page into a new xpage platform. It consists of a number of department-specific databases each with their separate ACL's with the old forms and docs, and one new xpage db front end presenting data from across the other db's read only. The content is regulations and resources for the rest of the organization to relate to.
The design consists of just a few custom controls which collects data sources dynamically via properties on the various department specific xpages. So like 30 xpages collecting data from separate db's utilizing the same handful of cc's
My scoped variable issue is related to my cc_dataViewLocal . This dataView presents the documents from the corresponding views in the source db's. To let the user know their present location in the application I pull in the name of the current view and display the name above the Data View as a headline on the DataView xpage:
<xp:text escape="true" id="computedField1" styleClass="ksHeading2">
<xp:this.value><![CDATA[#{javascript:getComponent("dataView1").getData ().getView()
}]]></xp:this.value>
</xp:text>
All documents from all databases are presented using the same documentDisplay xpage with a dynamic document data source. Thus this xpage does not have any properties but is referenced trough the data view xpage:
<xe:dataView id="dataView1" collapsibleCategory="false"
rows="50" style="font-size:8pt" rowStyle="font-size:8pt"
collapsibleDetail="true" pageName="/**ks_documentDisplay.xsp**"
var="rowHandle">
--
When I open a document from the data view in documentDisplay.xsp I want the same headline/name of the original view displayed there as well. To make that happen I try to catch the view name in a scoped variable in an afterPageLoad event in the data view xpage, to redisplay it on the documentDisplay xpage.
<xp:this.afterPageLoad>
<xp:setValue binding="#{sessionScope.ksView}">
<xp:this.value><![CDATA[#{javascript:getComponent
("computedField1").value}]] ></xp:this.value>
</xp:setValue>
</xp:this.afterPageLoad>
After all the view name is not part of the document data source, and I have no other handle to the parent view at this point as I can see.
--
When I display the scoped variable on the dataView xpage in a computed field it works fine:
<xp:text escape="true" id="computedField2"
styleClass="ksHeading1" value="#{sessionScope.ksView}">
However, when I try to display the same session variable in the documentDispay xpage using the same computed field coding it turns up empty. Like the sessionVariable is lost to the next xpage?
I started out with a viewScope, and tried both request and session with same results. What am I missing??
Any input greatly appreciated! Including workarounds but would like to get a grip on the scoped variables...:-)
Regards to all who read this somewhat long post and thanks in advance!
Vidar Solevag
Thanks again for pointing me in the right direction. The problem clearly was I wiped the sessionScope in some way or other, exactly how I still don't know.
But as often is the case the solution was to do something else to get the same thing done...
What I found not to work:
-Moving the event to onClientLoad didn't work it threw an exception "cannot handle". In addition my original approach afterPageLoad did't really work either as it didn't update properly as other dataViews were chosen via Navigator on the page. Also setting the variable via the "Set" option on the simpleAction list turned out to be a problem. I got several "Not allowed to set the value of a read only computed expression"
What I did that worked:
-I set the value not by "Set"Simple action but by "Excecute script" and code
sessionScope.ksView=context.getSubmittedValue(). This in the onClick event in Navigator that selects which Dataview to display On the DataView xpage Then the SessionScope remains alive all the way into the documentDisplay xpage and until a different Dataview is selected back in the Nav back on the DataView xpage.
Now using the same sessionScope as the viewName property on the xpage I also set the sessionScope initially on afterPageLoad to have a default value when page is first opened...
So thanks again, a lot of headbanging into the wall here but that's what you learn from I guess :-))
I have a radar chart which renders when read from json file. i have used listeners for this purpose. Now, I need this to be upgraded to rest call. I have a rest call which is fired when I click a button. This rest call returns data to a store and data model. I want to render the radar chart using this data. So each time the button is clicked, a new set of data is returned. How can I achieve the rendering of the radar chart each time new data is received?
If any code is needed, please feel free to ask for it.
Thanks.
I am rendering a mock chart initially using listeners. On button click I use a different set of data model, store and listeners (within the button's handler function). This store fires the rest call and loads the new chart each time the button is clicked.
I have an application that has 3 level of data depth:
list of presentations
presentation detail
presentation slides
Right now when user came to the app he's presented with list loaded from JSONP store. He click on one item and the callback function receives the record. It pushes it into new view - the detail and displays it. User can disclose presentation slides from there - data record is passed from detail again.
Problem is when user refreshes the page or came from URL. If he came to url like /presentations/slides/1, he wants to see the slides for presentation id:1. Problem is that as long as he wasn't at the list, data was not loaded and because it was not loaded, it was not passed to the detail and the detail didn't pass it along to the slides view. So I have no data.
But I still have the ID! Comming from the PHP's Zend Framework, I would call something like: this.store.find(1), but I can't find any way to do this.
How do I load something from the store based on it's record.data.id?
To add more, store.load() seems to work asyncronously, so when I do:
store.load();
store.each(function(rec){console.log(rec);});
It wouldn't work with JSONP store, because the data is not loaded yet. But when I use Chrome Debuger and pause the execution to let the data load, it works :(
You are correct the load is asyncronously so all you have to do is use the callback function of the store. You can find an example here How to get data from extjs 4 store
I have created a custom control which I am using multiple times on the page.
I checked value at the Loaded event.
Due to long delay of data retrieval, I am not able to check value at the control loaded event.
Now I need to reload the control after data retrieval from the WCF service.
Can you please suggest me the right approach to do the same.
Thank you.
If you are using Silverlight to call a WCF service to get your data, you will be working Asynchronous right?
You could hook up the completed event of your webservice call to do anything (like reloading, rebinding your controls) you want after the data has been retrieved from your WCF service.
It would be better if you could set up binding to your custom control. Whenever the observable data is retrieved and assigned to your binding object, your control will be updated.