We will add the following functionalities:.
Sometimes we need an expandable editor, to allow the user to write long text and be able to see the complete text. This is what happens right now when trying to do it:. To solve this issue in Android you just have to add a custom control and in the TextChanged event call InvalidateMeasure.
To support this, I created a custom renderer and in the OnElementChanged method setted those properties:. To add the placeholder we will create a custom renderer for each platform and will use their native apis to handle the placeholder.
To be able to change this dynamically we will create bindable properties to set this values from Forms. To put everything together I created an Extendable Editor Control that support these three features. Also it uses bindable properties to allow changing their values in runtime. Extended Editor in Xamarin Forms Rendy. May 8, We will add the following functionalities: Auto expand Adding Corner Radius Adding a Placeholder Converting our editor to auto expandable Sometimes we need an expandable editor, to allow the user to write long text and be able to see the complete text.
This is what happens right now when trying to do it: To solve this issue in Android you just have to add a custom control and in the TextChanged event call InvalidateMeasure. SetCornerRadius 5 ; gd. SetStroke 2, Color. ToAndroid ; this. Result: Adding a Placeholder To add the placeholder we will create a custom renderer for each platform and will use their native apis to handle the placeholder.
Android Set the hint text Control. ToAndroid ; To be able to change this dynamically we will create bindable properties to set this values from Forms.
IsNullOrEmpty Control.For single line entries, see Entry. Backing store for the property that controls whether the editor will change size to accommodate input as the user enters it. The backing store for the IsTextPredictionEnabled field. Backing store for the PlaceholderColor property. Backing store for the Placeholder property. Backing store for the TextColor property. Gets or sets the X component of the center point for any transform, relative to the bounds of the element.
This is a bindable property. Gets or sets the Y component of the center point for any transform, relative to the bounds of the element. Gets or sets a value that allows the automation framework to find and interact with this element. Gets or sets a value that controls whether the editor will change size to accommodate input as the user enters it.
Gets or sets the color which will fill the background of a VisualElement. Gets or sets object that contains the properties that will be targeted by the bound properties that belong to this BindableObject.
Gets or sets a value that indicates the number of device-independent units that should be in between characters in the text displayed by the Entry.
Applies to Text and Placeholder. Gets or sets the LayoutOptions that define how the element gets laid in a layout cycle. Gets or sets a value indicating whether this element should be involved in the user interaction cycle. Gets or sets a value indicating whether this element is enabled in the user interface.
Gets or sets a value that indicates whether user should be prevented from modifying the text. Default is false. Gets or sets a value that indicates whether this element is included in tab navigation.
Gets or sets a value that determines whether this elements should be part of the visual tree or not. Gets or sets the opacity value applied to the element when it is rendered.
Gets the element which is the closest ancestor of this element that is a VisualElement. Apply the bindings to BindingContext. Signals the end of a batch of commands to the element and that those commands should now be committed.
Clears any value set by SetValue for property. Clears any value set by SetValue for the property that is identified by propertyKey. Returns the child elements that are visually beneath the specified point.
Returns the SizeRequest of the element. Calling this method begins the measure pass of a layout cycle. Method that is called to invalidate the layout of this VisualElement.
Raises the MeasureInvalidated event. Returns true if the target property exists and has been set. Returns the platform-specific instance of this Editoron which a platform-specific method may be called.LiveXAML runs while you are debugging your application inside an emulator. Whenever you save any XAML file, it automatically updates the running application. LiveXAML has no restrictions on libraries or code usage.
You can interact with the interface as you normally do.eruvtbg.space 101: Entries and Editors
No additional configuration needed besides initial installation. This email will be used to activate the license in Visual Studio extension. Your email. Contact at info ammyui. Follow on twitter Visit on facebook.
Visual Designer in Xamarin Forms
Visual Studio extension Visual Studio for Mac extension. Visual Studio for Windows extension can do it automatically. Mac version doesn't have this functionality yet, so you will have to install them manually. NuGet package installation instructions are here. Familiar workflow Regular application debugging with the benefit of runtime UI update.
Easy to use Start debugging session and you're set! Time saver Saves tons of time and money on UI development. LiveXAML installation and demo. Yes, it does. Device should be connected to the same network as the host PC. Also, you need to make sure that firewall isn't blocking incoming connections on ports and Default Windows firewall will allow these connections automatically.Download the sample. The Editor control is used to accept multi-line input.
This article covers:. The Editorlike other text-presenting views, exposes the Text property. This property can be used to set and read the text presented by the Editor. The Editor can be set to show placeholder text when it is not storing user input. This is accomplished by setting the Placeholder property to a stringand is often used to indicate the type of content that is appropriate for the Editor.
In addition, the placeholder text color can be controlled by setting the PlaceholderColor property to a Color :.
Extended Editor in Xamarin Forms
Users can be prevented from modifying the text in an Editor by setting the IsReadOnly property, which has a default value of falseto true :. The IsReadonly property does not alter the visual appearance of an Editorunlike the IsEnabled property that also changes the visual appearance of the Editor to gray. The MaxLength property can be used to limit the input length that's permitted for the Editor. This property should be set to a positive integer:. A MaxLength property value of 0 indicates that no input will be allowed, and a value of int.
MaxValuewhich is the default value for an Editorindicates that there is no effective limit on the number of characters that may be entered.
Character spacing can be applied to an Editor by setting the Editor. CharacterSpacing property to a double value:. The result is that characters in the text displayed by the Editor are spaced CharacterSpacing device-independent units apart. The CharacterSpacing property value is applied to the text displayed by the Text and Placeholder properties. An Editor can be made to auto-size to its content by setting the Editor. This enumeration has two values:. When auto-resizing is enabled, the height of the Editor will increase when the user fills it with text, and the height will decrease as the user deletes text.
An Editor will not auto-size if the HeightRequest property has been set. The keyboard that's presented when users interact with an Editor can be set programmatically via the Keyboard property, to one of the following properties from the Keyboard class:. Examples of each keyboard can be found in our Recipes repository. The Keyboard class also has a Create factory method that can be used to customize a keyboard by specifying capitalization, spellcheck, and suggestion behavior.
KeyboardFlags enumeration values are specified as arguments to the method, with a customized Keyboard being returned. The KeyboardFlags enumeration contains the following values:. The following XAML code example shows how to customize the default Keyboard to offer word completions and capitalize every entered character:.
The IsSpellCheckEnabled property controls whether spell checking is enabled. By default, the property is set to true. As the user enters text, misspellings are indicated. However, for some text entry scenarios, such as entering a username, spell checking provides a negative experience and so should be disabled by setting the IsSpellCheckEnabled property to false :. When the IsSpellCheckEnabled property is set to falseand a custom keyboard isn't being used, the native spell checker will be disabled.
However, if a Keyboard has been set that disables spell checking, such as Keyboard.GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. If nothing happens, download GitHub Desktop and try again. If nothing happens, download Xcode and try again. If nothing happens, download the GitHub extension for Visual Studio and try again. If you want to use the latest dev build then you should read this blog post :.
Add the nightly feed to your NuGet sources or add a NuGet. Config to your app placing it in the same directory where your solution file is with the following content:. Config should be with your application unless you want nightly packages to potentially start being restored for other apps on the machine. If you do not already have it installed, you can download it here.
The Android If you do not already have it installed, instructions to download and setup can be found here. When working on an earlier branch that does not have the cake scripts then you can use the following [build.
Forms solution. This step is no longer needed with Visual Studio for Mac Upon opening the Xamarin. At this point, you should be able to successfully build the solution. By default, the Xamarin. Controls project does not have a configuration for various API keys to access certain features on each platform e. When building the solution the first time, a controlgallery. If you aren't working with maps, you can ignore this. If you want to work with maps, you will have to obtain your own API keys for each of these services, inserted directly after the identifier e.
You can find out how to obtain each of these as follows:. Due to the way that Android works, the maps API key cannot be injected at runtime.
As a result, you will have to add this key to the MapsKey. Make sure you have nuget. After these steps are taken care of, you should be good to go. You can see all UI tests in Test Explorer, search them for your own convenience, and quickly run individual tests.
We follow the style used by the. NET Foundationwith a few exceptions:.It was one of the first questions I asked when starting Xamarin Forms and is one of the most requested features for Xamarin Forms.
But after a 1. Still waiting on a VS plugin but its on the roadmap and close to release from what I have been told.
Just for reference for this blog article I am using version 0. Its quick and simple, go to GorillaPlayer sign up for the beta or download the public version if they have released it publicly by the time you read thisbe sure to install the Xamarin Studio Add-in and SDK examples when it asks.
Once installed you will see a small icon in your taskbar and this is the local app that will monitor files in your project. When the file has the Gorilla tag next to it as you can see above, that means it is being watched by GorillaPlayer. You deploy an app to your emulator and you have the GorillaPlayer program running on your computer.
Then with the Xamarin Studio plugin, it tells GorillaPlayer which files to monitor and sends it over to the emulator for display and updates when necessary. Some more advanced things I tested out were:.
To really see what this can do I would have to use this in an actual app design. The product is fantastic and is going to save a huge amount of time just for quickly seeing what minor UI updates will do. Go ahead and give it a try for your next project, it will certainly shave some time off your UI design for a large project.
I might post a followup on this project in a few months after I have had a chance to use it for an actual project and put it through its paces. Subscribe to a hand-picked round up of the best Xamarin development links every week. Published every Friday. Signup to Weekly Xamarin. I do a complete run down in Xamarin Forms Visual Previewer. Adam Pedley. Mobile Developer Build Flutter.I've been searching for an online XAML editor for Xamarin Forms that I can easily and quickly mock things up or just practice basics for layout designs without having to run Visual Studio, wait for my projec to build, run my emulator, etc.
I finally found one in the samples pages of the Ooui Library lets you build xaml websites using Xamarin Forms :. CONS: 1. Currently uses Xamarin.
Forms 2. Forms 3. Unable to get images to work. Again, the primary upside of this is going to be people who are not overly familiar with XAML and are looking to get a feel for layouts screenshot from the website below.
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