Xamarin Forms Custom Popup

Create a new BlankApp (Xamarin. Forms Introduction:This article will explain us how to saves specific properties directly to each platforms native settings APIs (NSUserDefaults, SharedPreferences, etc) using Xam. Jan 20, 2017 · For too long it's been something that wasn't an option for Xamarin Forms. Forms provides a rich set of features for implementing validation: the usage of INotifyDataErrorInfo, Data Annotations, Behaviors and Effects permit the handling of complex scenarios including multiple conditions per field, cross-property validation, entity-level validation and custom UI depending on the platform. Apr 13, 2015 · >> New Xamarin. Creating a hamburger menu in Xamarin. See you in next article. Popup dotnet add package Rg. popup Install rg. SKMaps: Xamarin. Kym Phillpotts. Nov 11, 2019 · WhatsApp UI in Xamarin. Forms Creating a new solution Installing and using the Prism Template Pack. Apr 05, 2016 · Xamarin Forms EnumBindablePicker Posted by Wayne Creasey April 5, 2016 April 7, 2016 6 Comments on Xamarin Forms EnumBindablePicker One of the controls missing from Xamarin Forms is a “BindablePicker” that allows you to dynamically bind an ItemsSource and SelectedItem from your view model. The toolbar is a row of commands, usually sitting right below the main menu of a standard Windows application. Forms is terribly exciting. Xamarin Forms popup plugin. By Paul on Xamarin Forms - Working with threads 2 Nov 2019, 14:25 PM By Amit tiwari on How to add a Xamarin Forms Loading Screen/Overlay 3 Oct 2019, 10:29 AM By Mahmoud Radwan on Xamarin Forms multiple instances of same app open 16 Sep 2019, 21:16 PM By للل on JQuery Unobtrusive Validation for dynamically created elements. Nov 29, 2017 · Using a Picker in Xamarin Forms is really simple you just need to add the control to a page, set items and that’s it. In order to complete this, we are going to create a custom Xamarin. Forms (XF) and it's been a fraught time (see bottom of post). Popup - is a cross platform plugin for Xamarin. It's not too hard to find stories of people who gave up on Xamarin. you can do this on any android phone by pressing a combination of hardware buttons, though some samsung galaxy phones have slightly different hardware options than their. There can be a scenario where a toast message is to be displayed in a custom UI as a popup or an alert message. Forms custom user interface controls should derive from the View class, which is used to place layouts and controls on the screen. Underlined Label Text in Xamarin. c# - Custom picker renderer draw event not recognized in Xamarin. Forms application. Having some troubles getting ways I've seen online to work. Xamarin Forms is an abstraction of each platform's APIs into a single API allowing for each mobile platform to share a single codebase while maintaining a native look and feel. An alert box can be popped-up on a Xamarin. But often it became cumbersome when you want to do something that doesn't come out of the box. User Settings in Xamarin. Again, you read it right its pure xaml. Pop-up windows are displayed separately from an application's main window and disappear after the specified user action. Go to Tools > Extensions and Updates select Online and search for Prism Template Pack. Wow, we thought this was going to be impossible!! Using Xamarin Forms trying to get our own map pin image on the map was one thing but then getting the location to update without having to clear all the pins was a challenge!!. Forms: Lessons learned Eric Polerecky - @detroitpro 2. Forms9Patch enhances Xamarin Forms to make multi-resolution / multi-screen image management, custom fonts, and HTML text formatting easy for NetStandard, PCL and Shared Library applications for iOS, Android and UWP. The following elements participate in routing: One IScreen,. Custom App Header in Forms It is safe to assume that any business with a customer facing application will want to brand their application with at least their logo. This means if the user enables the toggle switch, the LED is turned on. Creating a custom control in Xamarin Forms should be pretty straightforward, right? Well…I just spent hours on solving a mystery FileNotFoundException. Forms Android project and calling the pop-up in PCL code. That’s why I created a custom control HyperlinkUIView that inherits from UITextView and overrides these behaviors. For too long it's been something that wasn't an option for Xamarin Forms. Build an accordion view in Xamarin. In this tutorial we are going to see how to know which row or cell is clicked and implement Delete button in ListView for iOS and ContextView Delete for Android devices. While it was possible (everything is possible with a custom renderer) it took a lot of work to get bottom tabs on Android. Custom keyboard. To create a DialogFragment need to inherit from the class android. If you don’t know by now, Xamarin Forms is a powerful, cross platform mobile application framework. One version of the plugin must be installed to each native project and PCL/Net. Intro to Xamarin. Building Apps with Xamarin 3. Mar 21, 2019 · You could switch it to Zoom type or disable the animation completely to make the popup show as quickly as possible. Form Problem updating. Forms post, I thought I'd share something that I've seen some other folks struggling with: getting an OAuth2 authentication process to work with Xamarin. Tip – Borderless DatePicker I previously put out a post on removing the border of a Xamarin. Anbu Mani Having 3. Forms controls using SkiaSharp So They've Signed in with Apple, Now What?. Implementing in Xamarin. Apr 03, 2017 · Xamarin. Run your Visual Studio and create new Xamarin. Forms with custom controls by Jason Smith, was a very very good session. This means if the user enables the toggle switch, the LED is turned on. FormSheet for iOS, causing the modal to be opened as a popup on iPad. Create Custom Renderer For xamarin. May be an. As you can see here we have seven main properties: Children: A string list of item names. And it's into those projects that we must add the custom fonts - then later reference those fonts from the Xamarin. Popup) and for better look, I have overridden the style of Entry in Xamarin. Xamarin Forms Controls / Popup. ListViewAdapter Xamarin. Forms UI Kit. If the app is not active, we display the regular toast message. Push notifications are normally displayed as toast messages. In an app of any meaningful size, wrapping up common functionality in a composite control reduces the long-term effort needed to craft the app. First the visual appearance of the popup is not important in my case. An example of this might be when having a…Continue ReadingAdding Badge to ToolbarItem in Xamarin Forms. Every Xamarin. Continue. )xamarin forms custom popup 5. Forms implementation uses Send. Popup for the Fancy UI World The basics to create custom Xamarin. I am new to C# Xamarin. ai) application (btw, this was my first Xamarin. Creating User Controls in Xamarin Forms In my earlier blog about accordion user control , I just missed explaining about the whole need and purpose of user controls. Forms Xaml, it's easy to add children to a Grid by specifying the row, column, column-span, and row-span, but doing it programmatically is a little more tricky. Forms pages as a popup that can be shared across iOS, Android and UWP (macOS supporting will be soon). So we made a custom dialog made purely in xaml without custom renderer. Mar 08, 2018 · Sometimes we need to add a badge to a toolbar item to show a dynamic counter. Have you seen any __real__ performance issue with Xamarin. I am about to start a new project with Xamarin. By Paul on Xamarin Forms - Working with threads 2 Nov 2019, 14:25 PM By Amit tiwari on How to add a Xamarin Forms Loading Screen/Overlay 3 Oct 2019, 10:29 AM By Mahmoud Radwan on Xamarin Forms multiple instances of same app open 16 Sep 2019, 21:16 PM By للل on JQuery Unobtrusive Validation for dynamically created elements. Forms built-in infrastructure. Clearable DatePicker in Xamarin Forms August 24, 2017 10 Comments. In the meantime, let's start with figuring out how to use a native iOS search entry in the navigation bar of a Xamarin. Creating a Simple Modal Dialog Form for Xamarin. Net Standard and cl. Beautiful XAML templates for your Xamarin. how to take screenshots on an android. With a search box that can be added to the top of each page, the search query is handled by custom Search Handler that processes the underlying data source and returns the results back to the search box and displays them in a popup list. Given a Target element, some Content to display, and an allowed PointerDirection , Forms9Patch. Let's take a look at each. like if you are using some third party custom controls, native controls. Standard before to be used. It's become simple when you already know the solution: Custom Renderer. For that, go to Solution Explorer >> click SnackBarDemo(PCL) project >>right-click and select add >>followed by select New Item>> In the popup window, scroll down and select Interface >> give the. It inherits from the Xamarin (Forms) DatePicker control. A modal page encourages users to complete a self-contained task that cannot be navigated away from until the task is completed or cancelled. Build Cross-Platform Android and iOS UIs with Xamarin Forms This article was peer reviewed by Adrian Sandu. e instead of clicking the picker and having it pop-out I can show all the options directly on the page. With XLabs. Forms has grown to be Xamarin's most popular cross-platform offering. Having some troubles getting ways I've seen online to work. Oct 07, 2014 · Building a Xamarin Forms Custom AppBar. Forms I've finally managed to get some time to look at the Smite Scoreboard application that I'm using as a vehicle to dive into Xamarin. Define the Custom layout for Dialog fragment. As I've discussed before at XAM Consulting we have a goal to contribute to the Xamarin ecosystem and help companies build great things, our premium components are one part of this goal. c# - Custom picker renderer draw event not recognized in Xamarin. Custom Master Detail Page In Xamarin. Forms pages as a popup that can be shared across iOS, Android and UWP (macOS supporting will be soon). This article deeply explains the XAmarin. Forms Xaml, it's easy to add children to a Grid by specifying the row, column, column-span, and row-span, but doing it programmatically is a little more tricky. Popup for the Fancy UI World The basics to create custom Xamarin. Forms - Amy Burns jumps into Xamarin. Forms application Xamarin. Appcenter push notification xamarin forms. For more. Forms as shown in the following image. This kind of control is not available in Xamarin forms but with the help of small trick we can easily achieved. Popup) and for better look, I have overridden the style of Entry in Xamarin. we have one option called rg. Continuing this series of simple MVVM bindings in Xamarin. Forms application. Whats people lookup in this blog: Xamarin Forms Frame No Border; Xamarin Forms Frame Without Border. forms In this blog, you will learn how to create a custom popup in xamarin. c# - Custom picker renderer draw event not recognized in Xamarin. In this article, we will display a popup dialog when a notification is received and the app is open. With a search box that can be added to the top of each page, the search query is handled by custom Search Handler that processes the underlying data source and returns the results back to the search box and displays them in a popup list. How to continuously update a custom map pin location on a map using Xamarin Forms Maps. Charles Petzold has also written a chatper on AbsoluteLayout for the forthcoming Xamarin Forms book which is worth checking out here. NET CLI Paket CLIR Direct Download Install-Package Rg. Sometimes we need to add a badge to a toolbar item to show a dynamic counter. forms Hi, just wondering if there is a working colour picker for xamarin. Using the Android SDK, you can quickly. Push notifications are normally displayed as toast messages. Forms project). Forms linker issues), I've decided to see what are the other means of getting your app package to decrease in size and potentially improving its performance. Forms application. Mar 23, 2015 · In Our last tutorial we have seen how to add a Custom Cell in our ListView in Xamarin. Xamarin Forms has a rich set of controls which work natively across platforms. Toast PopUp For Xamarin. As designers continue to wield more influence over the design of apps, custom fonts are an increasing necessity, especially since they want the app to look similar on multiple. Building IoT or Mobile solutions are fun and exciting. The request was to have a blurred image view on Android. Form Problem updating. Finally, we'll utilize platform-specific capabilities, such as iOS's support for Social Media. We can provide a Title, Body (Text to be alerted) and one/two Action Buttons. Similarly, the user disables the toggle switch and the LED is turned off. In this post we will see how to create a custom Popup in Xamarin Forms. By Paul on Xamarin Forms - Working with threads 2 Nov 2019, 14:25 PM By Amit tiwari on How to add a Xamarin Forms Loading Screen/Overlay 3 Oct 2019, 10:29 AM By Mahmoud Radwan on Xamarin Forms multiple instances of same app open 16 Sep 2019, 21:16 PM By للل on JQuery Unobtrusive Validation for dynamically created elements. An alert box can be popped-up on a Xamarin. For more information. There can be a scenario where a toast message is to be displayed in a custom UI as a popup or an alert message. Forms Android project and calling the pop-up in PCL code. Forms Dialog control, is an alert dialog or popup that can be displayed in the desired position. Forms project to create and configure a custom popup in this tutorial for mobile and cross-platform development. Apr 03, 2017 · Xamarin. Popups in ArcGIS Runtime SDK for. xaml file and add the custom control as shown in below. this wikihow teaches you how to take a snapshot of your android's on-screen content. Forms has grown to be Xamarin's most popular cross-platform offering. Forms Android project and calling the pop-up in PCL code. c# - Custom picker renderer draw event not recognized in Xamarin. Forms linker issues), I've decided to see what are the other means of getting your app package to decrease in size and potentially improving its performance. Oct 10, 2019 · The basics to create custom Xamarin. Xamarin Forms is an abstraction of each platform's APIs into a single API allowing for each mobile platform to share a single codebase while maintaining a native look and feel. Forms code will send messages back and forth to the platform specific code. This article demonstrates how to navigate to modal pages. Getting Started with Xamarin Picker (SfPicker) This section explains the steps required to configure a picker control in a real-time scenario, and provides a walk-through on some of the customization features available in picker control. getView() is the method that returns the actual view used as a row within the ListView at a particular position. I'm using Xamarin Forms "portable" and XAML frontend with Android API 23. Hello, I would like to implement a custom popup edit form to allow users to edit an url inplace in a treelist-cell. Forms is not as easy as I thought. Forms to enable this funcationality. Note: This is not intended to be installed on a. Forms In this blog, we will learn how to display a Toast PopUp in Xamarin. Forms application Xamarin. )xamarin forms modal popup 4. Prism for Xamarin Forms - Advanced navigation (Part 3) Prism for Xamarin Forms - Basic navigation and dependency injection (Part 2) Prism for Xamarin Forms - An overview (Part 1) Integrating Facebook in a Universal Windows app; Recent Comments. But what happens when we have a design in which we have an icon on the right side of our picker (To add some styling to it)? a solution could be to […]. Whether you want to enable date selection or create a full-blown scheduling functionality the Xamarin. ngrok kullanmam gereken 2 adet backend uygulaması var ve şimdiye kadar tek tek ngrok komutlarını yazıp çalıştırıyordum, ngrok ise pro sürümünde aynı anda 2 process'ten fazlasına izin vermiyor. Your post post and the code sample is very helpful for. Enumerator; Top Will show popup on top of the specified view. Apr 05, 2016 · Xamarin Forms EnumBindablePicker Posted by Wayne Creasey April 5, 2016 April 7, 2016 6 Comments on Xamarin Forms EnumBindablePicker One of the controls missing from Xamarin Forms is a “BindablePicker” that allows you to dynamically bind an ItemsSource and SelectedItem from your view model. Custom popup dialog in Xamarin. You are now able to set the modal presentation to UIModalPresentationStyle. Forms is a great technology that let you to develop an application’s UI at once and deploy it on multiple platforms. Building IoT or Mobile solutions are fun and exciting. Forms - Xamarin. This is quite a standard way to set up a Xamarin Forms application using a XAML-based start page. Forms Page, in my case "MainPage" and add the custom control picker with Placeholder property. Apr 18, 2012 · Here Mudassar Ahmed Khan has explained with an example how to build a simple Modal Popup using ASP. NoOfColumns : Defines how many columns to show. A custom keyboard cannot offer inline autocorrection controls near the insertion point. Compiled applications (iOS, Android, Arduino and ESP8266) are 100% native without any dependencies. Creating a Left ToolbarItem in Xamarin. 1 day ago · Toggle popup. By Paul on Xamarin Forms - Working with threads 2 Nov 2019, 14:25 PM By Amit tiwari on How to add a Xamarin Forms Loading Screen/Overlay 3 Oct 2019, 10:29 AM By Mahmoud Radwan on Xamarin Forms multiple instances of same app open 16 Sep 2019, 21:16 PM By للل on JQuery Unobtrusive Validation for dynamically created elements. Forms - Amy Burns jumps into Xamarin. It's a nicely designed component (by. The Telerik Calendar for Xamarin allows you to easily implement various calendar and scheduling scenarios in your apps built with Xamarin or Xamarin. Enumerator; Top Will show popup on top of the specified view. Forms and i would like to know how can i create dropdown list in Xamarin. Forms but if you search a little, you will find the "Picker" control. Net Standard and cl. Forms UI Kit. I just forked your "spike" project on github. 1 was released with a few new magical properties that developers can set on the TabbedPage and also some new Platform Specifics for Xamarin. I recently tried to implement a real-world scenario with our DevExtreme Data Grid, which involved creating a complex custom popup editor. How Hamburger Menu in Xamarin. Forms Entry which was then used to create a custom PinView as well as a MaterialEntry that follows the material design standards for text fields. )xamarin forms popup with entry 2. Form via dependency service / Xamarin. But often it became cumbersome when you want to do something that doesn't come out of the box. Forms Dialog control, is an alert dialog or popup that can be displayed in the desired position. When the button is clicked in the Xamarin. Compiled applications (iOS, Android, Arduino and ESP8266) are 100% native without any dependencies. Custom App Header in Forms It is safe to assume that any business with a customer facing application will want to brand their application with at least their logo. By Paul on Xamarin Forms - Working with threads 2 Nov 2019, 14:25 PM By Amit tiwari on How to add a Xamarin Forms Loading Screen/Overlay 3 Oct 2019, 10:29 AM By Mahmoud Radwan on Xamarin Forms multiple instances of same app open 16 Sep 2019, 21:16 PM By للل on JQuery Unobtrusive Validation for dynamically created elements. Below is some code to help you to display Toast & SnackBar pop up ONLY in your Xamarin. WhatsApp Status List interface. SKMaps allows developers an easier integration of custom map features from a shared code base. In this blog post I provide a full sample that shows how to create a custom color picker control for Xamarin. Forms provides a rich set of features for implementing validation: the usage of INotifyDataErrorInfo, Data Annotations, Behaviors and Effects permit the handling of complex scenarios including multiple conditions per field, cross-property validation, entity-level validation and custom UI depending on the platform. Forms for developing a cross-platform chatbot (Bot Framework + LUIS. We are creating a custom ListView of by subclassing ArrayAdapter with the DataModel as the object. The first step is to create a custom subclass of the Image view class. Mar 29, 2019 · In the meantime, let's start with figuring out how to use a native iOS search entry in the navigation bar of a Xamarin. NET, XAML for Windows and Windows Phone as well as Web Forms. Forms code will send messages back and forth to the platform specific code. GitHub Gist: instantly share code, notes, and snippets. Like any platforms, it has limitations too, but yeah there are work arounds. Forms, and How to Customize Your Xamarin. Jul 09, 2016 · Below is some code to help you to display Toast & SnackBar pop up ONLY in your Xamarin. Forms Using Fresh MVVM In this tutorial, we will learn how to use master detail page in Xamarin. Learn how to use existing NavigationService by using Prism for Xamarin Forms' platform and how to implement your own. May 09, 2018 · The Xamarin. Display a popup with xamarin forms I want to display a small popup in a xamarin forms application (iOS/Android PCL) I am actually working with a ContentPage (XAML + C# code) and i am showing this popup with: await Navigation. It is simple and powerful. Forms is terribly exciting. Forms! It is a small change, but I thought I'd let you know. Oct 30, 2016 · I am trying to display information from a feature layer using PopUp. May 03, 2015 · So to wrap up this article, you can accomplish some pretty simple cross platform animations using Xamarin Forms by using ViewExtensions or AnimationExtensions. For too long it's been something that wasn't an option for Xamarin Forms. Forms code runs on multiple platforms - each of which has its own filesystem. Apr 30, 2017 · Xamarin. This way we can use a custom renderer on iOS to create a UISearchController as needed. How to use the Control: Let's see the code. Forms Autocomplete control suggests a list of filtered items in a pop-up or appends the rest of the suggested word in the input area. The Calcium AppBar for Xamarin Forms is composed of an ObservableCollection of buttons and an ObservableCollection of menu items. 2)the window that opened it must be "locked" (nothing on it can be clicked, disable buttons, textboxes and etc) And ofcourse the leave-or-die requirement it must fit the MVVM pattern. )xamarin forms popup with entry 2. Xamarin Forms : SQLite Local Database; Xamarin Forms - Image SlideShow & Popup; Xamarin Forms -Implementing Gridview using custom render file. Forms provides a rich set of features for implementing validation: the usage of INotifyDataErrorInfo, Data Annotations, Behaviors and Effects permit the handling of complex scenarios including multiple conditions per field, cross-property validation, entity-level validation and custom UI depending on the platform. How to do a simple InputBox dialog? - Xamarin Forums. In android and ios I am overriding the Draw event and drawing the control myself. Net Standard and Prism. The plugin allows you to open any page as a popup. Like any platforms, it has limitations too, but yeah there are work arounds. a ToolbarItem is an element that renders a "menu" on each platform letting you add elements like Menu on Android/iOS or ApplicationBar/MenuItems in Windows Phone. For sure you want to create a Xamarin Forms app with the most dynamic structure as possible. UserDialogs work and some samples? In this post, you will learn how to use Acr. Apr 18, 2017 · While Xamarin provides a vast array of frameworks, IDEs, and integrations, apps may sill need controls outside of those included in Xamarin. Tip – Borderless DatePicker I previously put out a post on removing the border of a Xamarin. 1 was released with a few new magical properties that developers can set on the TabbedPage and also some new Platform Specifics for Xamarin. Adding Fluent Design Acrylic Material to UWP via Xamarin. Forms is a great technology that let you to develop an application's UI at once and deploy it on multiple platforms. e instead of clicking the picker and having it pop-out I can show all the options directly on the page. Getting Started with Xamarin Picker (SfPicker) This section explains the steps required to configure a picker control in a real-time scenario, and provides a walk-through on some of the customization features available in picker control. I'm very happy to announce XAM Consulting's first Premium component release, SlideOverKit for Xamarin. popup package from Nuget for Pcl and Platform Specific Projects. Forms built-in infrastructure. These features are not listed by default in a Xamarin. Another way to think of it is a template that produces the visual hierarchy for your control or page. popup Install rg. Forms we may as well do it for iOS as well 1. To use a PopupPage inside an application, each platform application must initialize the Rg. Getting started with Prism for Xamarin. Forms View that contains the Url of the web page to load, and the method we want to call from Javascript. Forms PCL project and tested in Android emulator and iOS simulators. Like any platforms, it has limitations too, but yeah there are work arounds. PopPopupAsync // Hide. One of these custom items applies a specific filter to the grid data and another one clears this filter. Forms application. Forms My experience working with video and audio streaming in Xamarin. ; This sample project is Xamarin. But like time, technology marches on and some recent changes have made it a bit more difficult so I thought I'd take a few minutes to show you how to integrate the latest FontAwesome fonts into Xamarin Forms 2. Building Apps with Xamarin. Hello and welcome to this course. Forms, which is awesome, but one feature less talked about is the Messaging Center. Forms custom control recipe that mirrors the functionality of the CarouselPage - except the "pages" are simply Content Views. >> New Xamarin. Create a new BlankApp (Xamarin. Forms pages as a popup that can be shared across iOS, Android and UWP (macOS supporting will be soon). You seem to be playing with it for a while. I saw that you can specifiy a PopupDefinition on the FeatureLayer but how to display information on the MapView. The WPF ToolBar control. Custom keyboards, like all app extensions in iOS 8. ConditionalFocusLayout (the two classes with "missing" ctors, from above) As mentioned I'm using the latest stable XF 2. Forms Xamarin. Cross platform splash screen in Xamarin Forms so what you need to do is have a custom navigation behavior in the way you navigate to the first page. Forms as shown in the following image. That's a fine and reasonable implementation for Android. PopUp plugin in Xamarin Forms. Forms Introduction:This article will explain us how to saves specific properties directly to each platforms native settings APIs (NSUserDefaults, SharedPreferences, etc) using Xam. This section explains how to create a SfPopupLayout and configure it. i'm trying to implement the following behavior: the main window has a button which can toggle the appearance of a popup (derived from qwidget with the qt::popup window flag set. Show keyboard on screen android download show keyboard on screen android free and unlimited. Every Xamarin. For my first Xamarin. SKMaps allows developers an easier integration of custom map features from a shared code base. Run your Visual Studio and create new Xamarin. Forms Android project and calling the pop-up in PCL code. Forms - Amy Burns jumps into Xamarin. Forms navigation API with a custom ViewModel-centric navigation service. Forms controls using SkiaSharp Xamarin. The MessagingCenter class is part of Xamarin. Clone via HTTPS Clone with Git or checkout with SVN using the repository’s web address. )xamarin forms modal popup 4. We don't need any new properties so. We are following the last option. For that, go to Solution Explorer >> click SnackBarDemo(PCL) project >>right-click and select add >>followed by select New Item>> In the popup window, scroll down and select Interface >> give the. Forms we allow developers to write their UI code once and have it leverage the native controls everywhere. Forms controls using SkiaSharp So They've Signed in with Apple, Now What?. Forms picker control. You seem to be playing with it for a while. About ReactiveUI Routing. How to create Action sheets using Xamarin. Posted on November 13, 2017 in General, Upcoming. ; This sample project is Xamarin. Doing it one page at a time, now I'm stuck on a page where I need to get the screen's width and height. Forms PCL project and tested in Android emulator and iOS simulators.