Sizer

Introduction¶

Layout children game objects.

It is inspired from wxSizer.

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 sizer object

var sizer = scene.rexUI.add.sizer(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 sizer object

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

Import class¶

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

Import class

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

Add sizer object

var sizer = new Sizer(scene, config);
scene.add.existing(sizer);

Add sizer object¶

var sizer = scene.rexUI.add.sizer({
    orientation: 0,
    // rtl: false,
    // startChildIndex: 0,

    // x: 0,
    // y: 0,
    // anchor: undefined,
    // width: undefined,
    // height: undefined,
    // space: { left: 0, right:0, top:0, bottom:0, item:0 },

    // name: '',
    // draggable: false,
    // sizerEvents: false,
    // enableLayer: false,
});

or

var sizer = scene.rexUI.add.sizer(x, y, {
    orientation: 0,
    // rtl: false,
    // startChildIndex: 0,

    // width: undefined,
    // height: undefined,
    // anchor: undefined,
    // space: { left: 0, right:0, top:0, bottom:0, item:0 },

    // name: '',
    // draggable: false,
    // sizerEvents: false,
    // enableLayer: false,
});

or

var sizer = scene.rexUI.add.sizer(x, y, width, height, {
    orientation: 0,
    // rtl: false,
    // startChildIndex: 0,
    // anchor: undefined,
    // space: { left: 0, right:0, top:0, bottom:0, item:0 },

    // name: '',
    // draggable: false,
    // sizerEvents: false,
    // enableLayer: false,
});

or

var sizer = scene.rexUI.add.sizer(x, y, width, height, orientation, {
    // rtl: false,
    // startChildIndex: 0,
    // anchor: undefined,
    // space: { left: 0, right:0, top:0, bottom:0, item:0 }
});

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.
orientation : Main orientation of the sizer.
- 'left-to-right', 'horizontal','h', 'x', or 0 : Arrange game objects from left ot right. Default value is 0.
- 'top-to-bottom', 'vertical','v', 'y', or 1 : Arrange game objects from top to bottom.
rtl :
- false : Layout children from left to right. Default behavior.
- true : Layout children from right to left.
startChildIndex : A number, start index of first layout child. Default value is 0.
space : Pads spaces.
- space.left, space.right, space.top, space.bottom : Space of bounds.
- space.item : Space between 2 children 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.

Custom class¶

Define class

class MySizer extends RexPlugins.UI.Sizer {
    constructor(scene, x, y, minWidth, minHeight, orientation, config) {
        super(scene, x, y, minWidth, minHeight, orientation, config);
        // ...
        scene.add.existing(this);
    }
    // ...
}

Create instance

var sizer = new MySizer(scene, x, y, minWidth, minHeight, orientation);

Add background¶

sizer.addBackground(child);

or

sizer.addBackground(child, {left: 0, right: 0, top: 0, bottom: 0}, key);

left, right, top, bottom : Extra padded space. Default is 0.
key : Add this child into childMap, which could be read back by sizer.getElement(key).
- undefined : Don't add this child. Default value.

Add child¶

Add a game obejct to sizer

sizer.add(child);

or

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

or

sizer.add(child, proportion, align, padding, expand, key, index);
// sizer.add(child, proportion, align, padding, expand, key, index);

child : A game object.
proportion :
- 0, or 'min' : Place next game object closely. Default value.
- > 0 : Stretch game object via proportion value.
- null : Don't arrange this child.
align :
- For horizontal orientation sizer :
  - 'center', or Phaser.Display.Align.CENTER : Align game object at vertical-center. Default value.
  - 'top', or Phaser.Display.Align.RIGHT_CENTER : Align game object at top-center.
  - 'bottom', or Phaser.Display.Align.BOTTOM_CENTER : Align game object at bottom-center.
  - Use addSpace() to align child at horizontal-center.
- For vertical orientation sizer :
  - 'center', or Phaser.Display.Align.CENTER : Align game object at horizontal-center. Default value.
  - 'left', or Phaser.Display.Align.LEFT_CENTER : Align game object at left-center.
  - 'right', or Phaser.Display.Align.RIGHT_CENTER : Align game object at right-center.
  - Use addSpace() to align child at vertical-center.
padding : Extra padded space. Default is 0.
- A number for left/right/top/bottom bounds,
- Or a plain object.
```
{
    left: 0,
    right: 0,
    top: 0,
    bottom: 0
}
```
expand : Set true to
- Expand height when orientation is 0 (left-to-right), or
- Expand width when orientation is 1 (top-to-bottom)
key : Add this child into childMap, which could be read back by sizer.getElement(key).
- undefined : Don't add this child. Default value.
index : Insert child to.
- undefined : Insert child at last.
minWidth : Minimum width of normal (non-sizer) game object, used when orientation is x, and proportion is not 0, or orientation is y, and expand is true
- Default value is current display width.
minHeight : Minimum height of normal (non-sizer) game object, used when orientation is y, and proportion is not 0, or orientation is x, and expand is true
- Default value is current display height.
fitRatio : Resize child to fit sizer height/width before layout children, when proportion is set to 0.
- 0 : Ignore this feature. Default behavior.
- > 0 : Fit ratio (width/height). 1 is square.

Insert child¶

sizer.insert(index, child, 
    {
        proportion: 0,
        align: 'center',
        padding: {left: 0, right: 0, top: 0, bottom: 0},
        expand: false,
        key: undefined,
        minWidth: undefined,
        minHeight: undefined,
        fitRatio: 0,
    }
);

or

sizer.insert(index, child, proportion, align, padding, expand, key);

Insert at position¶

sizer.insertAtPosition(x, y, 
    child, 
    {
        proportion: 0,
        align: 'center',
        padding: {left: 0, right: 0, top: 0, bottom: 0},
        expand: false,
        key: undefined,
        minWidth: undefined,
        minHeight: undefined,
        fitRatio: 0,
    }
);

or

sizer.insertAtPosition(x, y, index, child, proportion, align, padding, expand, key);

Add space¶

Add a stretchable space.

sizer.addSpace();
// sizer.addSpace(proportion);

Insert a stretchable space.

sizer.insertSpace(index);
// sizer.insertSpace(index, proportion);

Use cases :

Align child at center

sizer
    .addSpace()
    .add(child)
    .addSpace()

Align 2 children at left and right side

sizer
    .add(childLeft)
    .addSpace()
    .add(childRight)

Layout children¶

Arrange position of all children.

sizer.layout();

Remove child¶

Remove a child
```
sizer.remove(child);
```
Remove and destroy a child
```
sizer.remove(child, true);
```
Remove all children
```
sizer.removeAll();
```
Remove and destroy all children
```
sizer.removeAll(true);
```
Remove all children and backgrounds
```
sizer.clear();
```
Remove and destroy all children and backgrounds
```
sizer.clear(true);
```
Remove from parent sizer
```
sizer.removeFromParentSizer();
```

Get element¶

Get element
- All children items
```
var items = sizer.getElement('items');
```

Get by name

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

or

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

recursive : Set true to search all children recursively.

Get child index¶

var index = sizer.getChildIndex(child);

index : A number, or null.

RTL¶

Set rtl in config of constructor
Set rtl : sizer.setRTL(enable)
Get rtl : var rtl = sizer.rtl

Alignment of child¶

Set alignment of child in config of adding child
Set alignment of child : sizer.setChildAlign(child, align)
- align :
  - 'center', or Phaser.Display.Align.CENTER : Align game object at center. Default value.
  - 'left', or Phaser.Display.Align.LEFT_CENTER : Align game object at left-center.
  - 'right', or Phaser.Display.Align.RIGHT_CENTER : Align game object at right-center.
  - 'top', or Phaser.Display.Align.RIGHT_CENTER : Align game object at top-center.
  - 'bottom', or Phaser.Display.Align.BOTTOM_CENTER : Align game object at bottom-center.
Get alignment of child : var align = sizer.getChildAlign(child)

Proportion of child¶

Set proportion of child in config of adding child
Set proportion of child : sizer.setChildProportion(child, proportion)
Get proportion of child : var align = sizer.getChildProportion(child)

Expand of child¶

Set expand of child in config of adding child
Set expand of child : sizer.setChildExpand(child, expand)
Get expand of child : var expand = sizer.getChildExpand(child)

Other properties¶

See base sizer object, container-lite.