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nativescript-orientation v2.2.1

A NativeScript plugin to deal with Declarative UI and Screen Orientation

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nativescript-orientation

A NativeScript plugin to deal with Declarative UI and Screen Orientation This handles both sides of the orientation issues; both the events on when the orientation changes; and the ability to change the orientation manually.

Developed by

MasterTech

License

This is released under the MIT License, meaning you are free to include this in any type of program -- However for entities that need a support contract, changes, enhancements and/or a commercial license please contact me at http://nativescript.tools.

I also do contract work; so if you have a module you want built for NativeScript (or any other software projects) feel free to contact me nathan@master-technology.com.

Donate Patreon

Sample Snapshot

Sample1 Thanks to TJ VanToll for the awesome animated gif.

Installation

tns plugin add nativescript-orientation

NativeScript 2.x.x

tns plugin add nativescript-orientation@1.6.1

Usage

To use the module you just require() it:

require( "nativescript-orientation" );

This plugin has two separate abilities; the first ability is to setup the cool ability to run a function and setup the css when the screen is rotated. For this ability, you do NOT need to keep a reference to it for the orientation event handling and css. You only need to load it once. I recommend you add it to your app.js file and forget about it. It will automatically attach its methods to all the proper classes in the NativeScript library making it act as if they are built in. What this does is automatically add and remove the "landscape" to the current Page's cssClass variable (and does other magic behind the scenes allowing it to actually work).

If you want to manually control the orientation, then you will need to require it and use the functions you need.

You ask, how exactly does this help?

Well, guess what Cascading means in CSS?
Yes, this means this works now:

Plain Awesome NativeScript (PAN)

StackLayout {
  background-color: red;
}

.landscape StackLayout {
  background-color: green;
}

NativeScript Angular (NAN)


/deep/ .landscape StackLayout  {
    background-color: green;
}

I was recently informed the :host is a better options, as it causes less potential isolation side effects in Angular.

StackLayout {
    background-color : red;
}


.landscape :host StackLayout {
  background-color: green;
}

So in portrait the background would be red, in landscape the color is green. Please note in Angular, you need to prefix the .landscape with /deep/ for it to work! In addition, for Angular I was recently informed that :host is also a valid option, I have not tested this; but I wanted to get it documented.

Why use this?

You can set ALL the normal CSS values this way include width, height, font-size. By using the css to control any normal items and your own page's exports.orientation to control anything not controllable by css you can change the look completely between Landscape/Portrait.

You can add to any page you need it the following Function:

exports.orientation(args)

args.landscape = true | false
args.object = the current page

This function (if it exists) will be ran when the page is first created so you can set any needed defaults. (This is ran at the same time as the PageNavigatingTo event) This function (if it exists) will be ran each time the orientation changes. Since at this moment some items can't be controlled by CSS like orientation on ScrollView, this event allows you to control change those things when the orientation changes via your code.

Please note, there is also a built in event in NativeScript called orientationChanged event. The differences between these is that the built in event only gets called when the orientation changes; This event is called on every screen navigation and any time the device rotates; allowing you to setup any rotation stuff during the creation of the screen.
ANGULAR NOTE: The exports.orientation function event does NOT work in Angular since Angular does not have the same concept. You can use the orientation.addOrientationApplier instead.

Additional Helper Method

var orientation = require('nativescript-orientation');

orientation.getOrientation(sensors?)

optional sensor === true, will return you sensor values on android verses screen size calculation
Some android tablets lie about port vs landscape; so we determine the orientation based on the current screen sizes
  var orientation = require('nativescript-orientation');
  console.log(orientation.getOrientation());  // Returns the enum DeviceOrientation value

orientation.setOrientation(direction, animation)

Direction - "portrait" | "landscape" | "landscapeleft" | "landscaperight" | enum DeviceOrientation
Animation === false, disabled animation on iOS. (iOS ONLY currently)

This will automatically disable rotation support after it changes the orientation.

  var orientation = require('nativescript-orientation');
  orientation.setOrientation("landscape");  

orientation.enableRotation() - enable orientation

This will enable automatic orientation support

  var orientation = require('nativescript-orientation');
  orientation.enableRotation();  // The screen will rotate to whatever the current settings are...

orientation.disableRotation() - disables orientation

This will disable automatic orientation support and lock it to the current orientation

  var orientation = require('nativescript-orientation');
  orientation.disableRotation(); // The screen will no longer rotate 

orientation.setFullScreen(value) - true/false

Orientation Appliers

Orientation Appliers serve as hooks into the orientation application logic for nativescript-orientation. Whenever nativescript-orientation applies its orientation logic it also calls any Orientation Appliers that you've added. This allows you to easily execute your own logic when orientation needs to be considered/applied. Orientation Appliers are simple functions that receive 1 parameter: the current orientation in string form (the same as is returned from the orientation.getOrientation() method). Methods to add and remove Orientation Appliers, as well as examples, are supplied below.

oprientationApplierCallback

args.landscape = true | false
args.object = the current page

The callback receives the same arguments as the exports.orientation event in normal NativeScript.

orientation.addOrientationApplier(orientationApplierCallback)

This adds an Orientation Applier

var MyModule = (function() {
  var orientation = require('nativescript-orientation');

  this.boundProperty = "some value";


  function myCallback(args) {
      if (args.landscape) {
        // Do something landscap-y
        return;
      }

      // Do something portrait-y
      // Assume this includes updating boundProperty on this module's scope.      
      this.boundProperty = "a different value";
  }

  orientation.addOrientationApplier(myCallback.bind(this));

  return {
    boundProperty: this.boundProperty
  };
})();

exports.MyModule = MyModule;

orientation.removeOrientationApplier(orientationApplierCallback)

This removes an Orientation Applier from the set of Orientation Appliers that will be executed.

var MyModule = (function() {
  var orientation = require('nativescript-orientation');

 function myCallback(args) {
      if (args.landscape) {
        // Do something landscap-y
        return;
      }

      // Do something portrait-y
      // Assume this includes updating boundProperty on this module's scope.      
      this.boundProperty = "a different value";
  }

  var myOrientationApplier = myCallback.bind(this);
  orientation.addOrientationApplier(myOrientationApplier);

  // Somewhere later in your code...
  orientation.removeOrientationApplier(myOrientationApplier);

  return {
    boundProperty: this.boundProperty
  };
})();

exports.MyModule = MyModule;

Two key things to remember when using this functionality:

  1. Use myCallback.bind(this) when adding your Orientation Applier (this preserves the correct 'this' scope for your callback method).
  2. In Nativescript Angular, the orientation change event does not trigger an Angular Change Detection cycle. Because of this you'll need to manually trigger Change Detection within your Orientation Applier by injecting ChangeDetectorRef from @angular/core into your Component and calling this.changeDetectorRef.detectChanges() from within your Orientation Applier;

Contributors

  • Ashton Cummings
  • Dick Smith
  • Dimitar Tachev
  • Emiel Beeksma
  • Zsolt Racz
  • Brad Linard
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