Sizer

Introduction

Layout children game objects.

It is inspired from wxSizer.

• Author: Rex
• Game object

Live demos

• Nested sizer
  • Demo 1
  • Demo 2
  • Demo 3
• Proportion
• DOM child
• Set children interactive
• Drag drop child
• Bring child to top
• Fit-ratio

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 : 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,  // true
    }
);

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, or false : Ignore this feature. Default behavior.
  • true : Fit ratio (width/height) from game object's display size.
  • > 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)
  

Change children's align mode

sizer
    .setChildrenAlignMode(mode)
    .layout();

• mode : Alignment of icon, text, action game objects.
  • undefined, or 'left', or 'top' : Align game objects at left, or top.
    • Remove first and last space children.
  • 'center' : Align game objects at center.
    • Add two spaces as first and last children.
  • 'right', or 'bottom' : Align game objects at right, or bottom.
    • Add space as first child.

Layout children

Arrange position of all children.

sizer.layout();

See also - dirty

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.