I have two xaml page, PageOne.xaml and PageTwo.xaml. Each xaml has its own code behind PageOne.xaml.cs and PageTwo.xaml.cs running different logic.
Now, I wish to create a Pivot Control, adding two Xaml pages above as Pivot Item in C# code.
How can I do that?
Yes, you can. Simply convert PageOne and PageTwo into UserControls then set the PivotItem.Content to the UserControls.
This related question discuses lazy-loading of the UserControls for performance reasons.
Caliburn Micro, an MVC-like framework for Windows Phone and Windows 8, has a built in helper which automatically handles PivotItems like this.
You can't. A PhoneApplicationPage can be hosted only in a PhoneApplicationFrame. You will need to transfer your two pages layout into the Pivot control, in different PivotItems.
Related
Good afternoon,
I want to know if it will be possible to add Scala Swing objects (especially JFrame objects) in a Play 2.0 application, I look for something like this but I haven't found nothing.
I need a Text Area that the user can write, and after that when he/she submit, I need to create an instance of a Scala class which after that it will show in a JFrame are (if I can) something related with the textarea input.
I can do the textarea form with HTML but the other part I don't know how to do it if not with JFrames.
Are many other ways to do this?
The example of what I can do is (it's a App related on Lambda Calculi):
x ---> create a Var elemnt and display it in a JFrame
\x.x ----> create a Abs(Var,Var) element and display it in a JFrame
...
Can anyone help me?
Thanks in advance
Piotr's comment is correct; the two technologies (HTML and Swing) are very separate. I'm not sure exactly what you're trying to accomplish; however, it sounds like what you want to do is possible via Javascript. A good tutorial for Javascript can be found here: http://www.codecademy.com/tracks/javascript. Javascript is also very easy to integrate into a Play project; you can place your Javascript files in your project's /public folder and reference them from your HTML files using <script> tags.
In my Windows Store XAML app I’m using the TreeView control from the WinRTXamlToolkit and I’m attempting to two-way bind the SelectedItem property to a property on a ViewModel.
Out of the box, the SelectedItem property is read only and this makes sense because the control supports Virtualization.
I have seen some folk work around this with things like attached properties, helper methods and so forth, a great example of which is seen in this question
WPF MVVM TreeView SelectedItem
But all of the questions/solutions are not based on WinRT and all of my attempts to rework the solution code for a WinRT app have proven fruitless.
So, my question is, is this possible in a WinRT app? What am I missing?
Thanks
I'd skip trying to come up with a bindable property globally for the view model and instead use the IsSelectedBindingPath and IsExpandedBindingPath properties of the TreeView as in the debugging tools' example of the control's usage. Then when you want to select/expand an item from the view model - use a method similar to SelectItem() in my view model where I essentially set IsExpanded/IsSelected to true in item/node view models throughout the path from the root of the view model tree and load the content of the tree if the nodes in the expected path do not exist.
I have a Windows Store (Metro) application. I need to add support for scanning barcodes.
I tried using ZXing first. From what I was able to get working, you actually need to click and save an image for it to do the processing. There's no nice overlay of a red line "scanner" nor does it process a live feed. This isn't a very elegant solution. It works far better on Android. Basically, this won't work as I need a constant video and a constant search for a barcode to be in focus.
This blog (http://www.soulier.ch/?p=1275&lang=en) mentions that extrapolating a frame out of a WinRT video stream is not allowed in managed code which means I'd need to use C++.
So, are there any components out there that do this? Anything free or paid that I can get that would be written in C++ and can find and extrapolate a barcode? Learning C++ is not on my bucket list.
You can capture frames while displaying a preview with C# only. Here's an example control that does it:
https://winrtxamltoolkit.codeplex.com/SourceControl/latest#WinRTXamlToolkit/Controls/CameraCaptureControl/CameraCaptureControl.cs
Basically you need to create a MediaCapture object and associate it with a CaptureElement control to display the preview. Then you can use CapturePhotoToStreamAsync() to capture a frame to a stream of your selected encoding format and then have a go at it with your bar code reading code.
I made a lib for WinRT using ZXing & Imaging SDK.
It works well (but does not include any additional focus feature).
There is a lib and a sample app that you can try.
It works for barcodes and QRCode (barcode by default but just change the optional parameter in the scan function code to use QRCode)
Does anyone have a simple C# Example showing how you could use Custom Container ViewControllers with Xamarin / Monotouch as per this Apple documentation -
http://developer.apple.com/library/ios/#featuredarticles/ViewControllerPGforiPhoneOS/CreatingCustomContainerViewControllers/CreatingCustomContainerViewControllers.html
Instead of posting question, thought would be more helpful to go away and create an example.
https://github.com/wickedw/ViewControllerContainer/blob/master/README.md
Readme Excerpt
I got to a point within a project whereby I wanted to display 3 different "Screens" of information based on a user selection.
The TabBarController was not appropriate as the GUI sat within a UINavigationController hierarchy. Yet, the UISegmentedControl fitted the design well.
I already had my views fully coded as seperate ViewControllers (and not all using the same creation pattern, some used Monotouch Dialog, others Nib files, others Programmatic).
Therefore, I did not want to rewrite existing code to use a Single ViewController controlling multiple Views.
I also thought it was time I looked at "Custom ViewController Containers" as they seemed an ideal fit for this scenario.
I'm just getting into my first project with (the unbelieveably excellent) MVVMCross and I can't figure out how to do something that seems fairly basic: composite views.
Suppose I've got a Person (FirstName, LastName, etc), and a person has an Address (Street, City, PostalCode, etc.). So I'll also have a PersonViewModel and an AddressViewModel.
This is a strictly tablet based app (iPad only, actually) and I want to use containment to have the PersonView contain the (reusable) AddressView, such that the outer (person) view binds to Person, while the inner (address) view binds to Person.Address.
I (dimly) understand the presenter concept for showing the views, as discussed here, but I can't see how to handle the propagation of changes from Person to Address and back.
Suppose the Person object has an Address object, but the PersonViewModel shows the AddressViewModel in an AddressView by passing some sort of Address id and rehydrating. Then the AddressView is binding to a different Address object than the one the Person contains. I don't see how to keep the two in sync, which of course would defeat the whole purpose of binding.
How should I do what I'm trying to do?
This is a really wide topic...
...and there are lots of possible answers.
I think it's important to consider ViewModel's as a very simple concept - I'd like to encourage you to think of ViewModels just as being models for views - definitely don't think of them as 'whole page' objects.
....
Within MvvmCross, you can use ShowViewModel and custom presenters to change the UI if you want to - and this is demonstrated in several MvvmCross examples including the split view presenter - http://slodge.blogspot.com/2013/05/n24-splitviewpresenter-n1-days-of.html
This ShowViewModel technique is really useful for navigation - for changing the whole page or for significant portions of it.
However, you don't have to use navigation paradigms if your app doesn't need them.
If you want to, then you can instead:
build your own hierarchies of viewmodels within the core
and you can then build your own databound hierarchies of views within the UIs
It's entirely up to you - your app is king.
....
I feel like I'm not explaining this very well...
....
So I gave up and recorded this video - maybe it helps: http://slodge.blogspot.co.uk/2013/06/n32-truth-about-viewmodels-starring.html
The video and sample code only covers the iPad, but I hope it's easy(ish) to see how you would extend it to other platforms:
for Windows you can use UserControl
for Android you can use MvxFrameControl, custom view or Fragment code.
There's a plugin that allows Control navigation in addition to the default Views navigation, hope it helps: https://github.com/ChristianRuiz/MvvmCross-ControlsNavigation
Please check out this implementation of a custom presenter for MvvmCross projects. To support Fragments in android and also multiple fragments into one other fragment/activity:
https://github.com/JelleDamen/CustomMvxAndroidPresenter