Buttons

Introduction¶

A container with a group of buttons.

Author: Rex
Game object

Live demos¶

Usage¶

Sample code

Install plugin¶

Load minify file¶

Load plugin (minify file) in preload stage

scene.load.scenePlugin('rexuiplugin', 'https://raw.githubusercontent.com/rexrainbow/phaser3-rex-notes/master/dist/rexuiplugin.min.js', 'rexUI', 'rexUI');

Add buttons object

var buttons = scene.rexUI.add.buttons(config);

Import plugin¶

Install rex plugins from npm
```
npm i phaser3-rex-plugins
```

Install plugin in configuration of game

import UIPlugin from 'phaser3-rex-plugins/templates/ui/ui-plugin.js';
var config = {
    // ...
    plugins: {
        scene: [{
            key: 'rexUI',
            plugin: UIPlugin,
            mapping: 'rexUI'
        },
        // ...
        ]
    }
    // ...
};
var game = new Phaser.Game(config);

Add buttons object

var buttons = scene.rexUI.add.buttons(config);

Import class¶

Install rex plugins from npm
```
npm i phaser3-rex-plugins
```

Import class

import { Buttons } from 'phaser3-rex-plugins/templates/ui/ui-components.js';

Add buttons object

var buttons = new Buttons(scene, config);
scene.add.existing(buttons);

Add Buttons object¶

var buttons = scene.rexUI.add.buttons({
    // x: 0,
    // y: 0,
    // anchor: undefined,
    // width: undefined,
    // height: undefined,
    // origin: 0.5
    // originX:
    // originY:

    orientation: 0,
    // rtl: false,
    // buttonsType: undefined,

    // Elements
    // background: backgroundGameObject,

    buttons: [
        buttonGameObject,
        buttonGameObject,
        // ...
    ],
    expand: false,
    align: undefined,
    click: {
        mode: 'pointerup',
        clickInterval: 100
    },

    // space: 0,   // deprecated 
    // space: { left: 0, right:0, top:0, bottom:0, item:0 },

    // name: '',
    // draggable: false,
    // sizerEvents: false,
    // enableLayer: false,
    // eventEmitter: this,
    // groupName: undefined,

    // setValueCallback: undefined,  // or setButtonStateCallback: undefined
    // setValueCallbackScope: undefined  // or setButtonStateCallbackScope: undefined
});

x, y : Position of this object, it is valid when this object is the top object.
anchor : See anchor.
- left, right, centerX, x, top, bottom, centerY, y : Position based on visible window, which composed of
  - Percentage of visible width/height : 'p%', p: 0 ~ 100.
    - 'left'(=0%), 'center'(=50%), 'right'(=100%)
    - 'top'(=0%), 'center'(=50%), 'bottom'(=100%)
  - Offset : '+n', or '-n'.
- width, height : Set size (invoke onResizeCallback) based on visible window, which composed of
  - Percentage of visible width/height : 'p%', p: 0 ~ 100.
  - Padding : '+n', or '-n'.
- onResizeCallback : A default resize callback will be assigned interanlly.
width, height : Minimum width, minimum height.
origin, originX, originY : Set origin of this sizer. Default value is (0.5, 0.5).
orientation : Main orientation of button game objects.
- 'left-to-right', 'horizontal','h', 'x', or 0 : Arrange button game objects from left ot right.
- 'top-to-bottom', 'vertical','v', 'y', or 1 : Arrange button game objects from top to bottom.
rtl :
- true : Layout children from right to left.
- false : Layout children from left to right. Default behavior.
buttonsType : Type/behavior of these buttons.
- undefined : No extra behavior, default value.
- 'checkboxes' : Set these buttons to checkboxes.
- 'radio' : Set these buttons to radio.
background : Game object of background, optional. This background game object will be resized to fit the size of grid table.
buttons : Array of button game objects, or Space (scene.rexUI.add.space()).
expand : Set true to expand width, or height of buton game objects.
align : Note: Add Space (scene.rexUI.add.space()) into buttons parameter to have more flexible alignment style. Alignment of these button game objects. Only valid when expand is false.
- undefined, or 'left', or 'top' : Align game objects at left, or top.
- 'center' : Align game objects at center.
- 'right', or 'bottom' : Align game objects at right, or bottom.
click: Configuration of button clicking.
- click.mode :
  - 'pointerdown', 'press', or 0 : Fire 'click' event when touch pressed.
  - 'pointerup', 'release', or 1 : Fire 'click' event when touch released after pressed.
- click.clickInterval : Interval between 2 'click' events, in ms.
space :
- An object: Padding of button game objects.
  - space.top, space.bottom, space.left, space.right : Padding around bottons.
  - space.item : Space between 2 button game objects.
- A number: Deprecated, space between 2 button game objects.
name : Set name of this game object.
draggable : Set true to drag top-most object.
sizerEvents : Set true to fire sizer events. Default value is false.
enableLayer :
- false : Add child game objects into scene's display list. Default behavior.
- true : Add child game objects into an internal layer game object. See also.
eventEmitter : Dispatch buttons' touch events to other game object, default is this buttons game object.
groupName : Optional group name for argument of touch events.
setValueCallback, or setButtonStateCallback : Callback to set value of a button.
- undefined : No callback, default value.
- A function object.
```
function(button, value, previousValue) {
    // ...
}
```
  - button : Button game object.
  - value: true, or false.
  - previousValue : true, or false.

Custom class¶

Define class

class MyButtons extends RexPlugins.UI.Buttons {
    constructor(scene, config) {
        super(scene, config);
        // ...
        scene.add.existing(this);
    }
    // ...
}

Create instance

var buttons = new MyButtons(scene, config);

Layout children¶

Arrange position of all elements.

buttons.layout();

Other properties¶

See sizer object

Events¶

Click button

buttons.on('button.click', function(button, index, pointer, event) {
    // ...
}, scope);

or

buttons.on('button.click', function(button, groupName, index, pointer, event) {
    // ...
}, scope);

groupName : Optional group name.
button : Triggered button game object.
index : Index of triggered button game object.
pointer : Pointer object.
Cancel remaining touched events : event.stopPropagation()

Pointer-over button

buttons.on('button.over', function(button, index, pointer, event) {
    // ...
}, scope);

or

buttons.on('button.over', function(button, groupName, index, pointer, event) {
    // ...
}, scope);

Pointer-out button

buttons.on('button.out', function(button, index, pointer, event) {
    // ...
}, scope);

or

buttons.on('button.out', function(button, groupName, index, pointer, event) {
    // ...
}, scope);

Pointer-down button

buttons.on('button.down', function(button, index, pointer, event) {
    // ...
}, scope);

or

buttons.on('button.down', function(button, groupName, index, pointer, event) {
    // ...
}, scope);

Pointer-up button

buttons.on('button.up', function(button, index, pointer, event) {
    // ...
}, scope);

or

buttons.on('button.up', function(button, groupName, index, pointer, event) {
    // ...
}, scope);

Enable button's input

buttons.on('button.enable', function(button, index) {
    // ...
}, scope);

or

buttons.on('button.enable', function(button, groupName, index, pointer, event) {
    // ...
}, scope);

Disable button's input

buttons.on('button.disable', function(button, index) {
    // ...
}, scope);

or

buttons.on('button.disable', function(button, groupName, index, pointer, event) {
    // ...
}, scope);

Emit button click event¶

buttons.emitButtonClick(index);

index : Index of triggered button game object, or a button game object.

Enable/disable input of button¶

Enable a button's input
```
buttons.setButtonEnable(index);
// buttons.setButtonEnable(index, true);
```
- index : Index of triggered button game object, or a button game object.

Enable all buttons' input

buttons.setButtonEnable();
// buttons.setButtonEnable(true);

Disable
```
buttons.setButtonEnable(index, true);
```
- index : Index of triggered button game object, or a button game object.
Disable all buttons' input
```
buttons.setButtonEnable(false);
```
Toggle
```
buttons.toggleButtonEnable(index);
```
Toggle all buttons's input
```
buttons.toggleButtonEnable();
```

Get button's input enable

var enabled = bottons.getButtonEnable(index);

Get element¶

Get element

Background game object

var background = buttons.getElement('background');

Button game objects

var buttonObjects = buttons.getElement('buttons');

or

var buttonObject = buttons.getButton(index);

or

var buttonObjects = buttons.getElement('buttons[0]'); // First button

Get by name

var gameObject = buttons.getElement('#' + name);
// var gameObject = buttons.getElement('#' + name, recursive);

or

var gameObject = buttons.getByName(name);
// var gameObject = buttons.getByName(name, recursive);

recursive : Set true to search all children recursively.

Add child¶

Add button child
```
buttons.addButton(gameObject)
```
- gameObject : A game object, or an array of game objects.

Add non-button child, see sizer.add() method.

buttons.add(gameObject,
    {
        proportion: 0,
        align: 'center',
        padding: {left: 0, right: 0, top: 0, bottom: 0},
        expand: false,
        key: undefined,
        index: undefined,
        minWidth: undefined,
        minHeight: undefined
    }
)

Remove child¶

Remove button child
```
buttons.removeButton(gameObject, destroyChild);
```
- gameObject :
  - Game object, or array of game objects : Button game object.
  - A number, or array of numbers : Index of button game object.
  - A string, or array of strings : Name of button game object.
- destroyChild : Set true to destroy button game object.
Remove all buttton children
```
buttons.clearButtons(destroyChild);
```
- destroyChild : Set true to destroy button game objects.
Remove a button or non-button child, see sizer.remove() method.
```
buttons.remove(gameObject, destroyChild);
```
Remove all button or non-button children, see sizer.remove() method.
```
buttons.removeAll(destroyChild);
```

Show/hide button¶

Hidden elements won't be counted when layouting. Call buttons.layout(), or topSizer.layout() after show/hide any button.

Show button
```
buttons.showButton(index);
```
- index : A number index, or a button game object.
Hide button.
```
buttons.hideButton(index);
```
- index : A number index, or a button game object.

For each button¶

buttons.forEachButtton(callback, scope);

callback :

function(button, index, buttonArray) {
    // ...
}

Checkboxes/radio¶

Configure buttons to checkboxes/radio
```
var buttons = scene.rexUI.add.buttons({
    buttons: [
        buttonGameObject,
        buttonGameObject,
        // ...
    ],

    buttonsType: 'checkboxes', // or 'radio'
    setValueCallback: function(button, value, previousValue) {
        // ...
    }, // or setButtonStateCallback
});
```
- buttons : Array of button game objects.
  - Property name of each button game object will be used as a key in buttons.data
- buttonsType : Set type to 'checkboxes', or 'radio'.
- setValueCallback or setButtonStateCallback : Callback to set value of a button.
```
function(button, value) {
    // ...
}
```
  - button : Button game object.
  - value: true, or false.
  - previousValue : true, or false.
  - Also trigger 'button.statechange' event.
- State of a button : Stored in buttons.data
- Get states of all buttons :
```
var states = buttons.getAllButtonsState();  // { key: boolean }
```
- Clear states of all button :
```
buttons.clearAllButtonsState();
```
  - Will trigger setValueCallback and 'button.statechange' event.

Checkboxes¶

Read state
```
var state = buttons.getButtonState(key);
```
- key : name property of a button game object. (i.e. button.name)
- state : true, or false
Set state
```
buttons.setButtonState(key, state);
```
- key : name property of a button game object. (i.e. button.name)
- state : true, or false

Radio¶

Read state

var value = buttons.getSelectedButtonName();

or

var value = buttons.value;

value : name property of a button game object. (i.e. button.name)

Set state
```
buttons.setSelectedButtonName(key);
```
or
```
buttons.value = key;
```
- key : name property of a button game object. (i.e. button.name)

Events¶

On button state changed. For Checkboxes/radio

buttons.on('button.statechange', function(button, index, value, previousValue) {
    // ...
}, scope);

or

buttons.on('button.statechange', function(button, groupName, index, value, previousValue) {
    // ...
}, scope);

Can be used to replace setValueCallback.