Dynamic text

Introduction¶

Control position, angle of each character drawn on a canvas.

Author: Rex
Game object

Live demos¶

Usage¶

Sample code

Install plugin¶

Load minify file¶

Load plugin (minify file) in preload stage

scene.load.plugin('rexdynamictextplugin', 'https://raw.githubusercontent.com/rexrainbow/phaser3-rex-notes/master/dist/rexdynamictextplugin.min.js', true);

Add dynamic-text object

var txt = scene.add.rexDynamicText(x, y, width, height, config);

Import plugin¶

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

Install plugin in configuration of game

import DynamicTextPlugin from 'phaser3-rex-plugins/plugins/dynamictext-plugin.js';
var config = {
    // ...
    plugins: {
        global: [{
            key: 'rexDynamicTextPlugin',
            plugin: DynamicTextPlugin,
            start: true
        },
        // ...
        ]
    }
    // ...
};
var game = new Phaser.Game(config);

Add dynamic-text object

var txt = scene.add.rexDynamicText(x, y, width, height, config);

Import class¶

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

Import class

import DynamicText from 'phaser3-rex-plugins/plugins/dynamictext.js';

Add dynamic-text object

var txt = new DynamicText(scene, x, y, width, height, config);
scene.add.existing(txt);

Create instance¶

var txt = scene.add.rexDynamicText({
    x: 0, 
    y: 0,
    width: undefined, 
    height: undefined,

    padding: 0,  // {left: 0, right: 0, top: 0, bottom: 0}

    background: {
        color: null,
        color2: null,
        horizontalGradient: true,

        stroke: null,
        strokeThickness: 2,

        cornerRadius: 0,
        cornerIteration: null
    },

    innerBounds: {
        color: null,
        color2: null,
        horizontalGradient: true,

        stroke: null,
        strokeThickness: 2
    },

    style: {
        bold: false,
        italic: false,
        fontSize: '16px',
        fontFamily: 'Courier',
        color: '#fff',
        stroke: '#fff',
        strokeThickness: 0,
        shadowColor: null,
        shadowOffsetX: 0,
        shadowOffsetY: 0,
        shadowBlur: 0,
        backgroundColor: null,
        backgroundHeight: undefined,
        backgroundBottomY: undefined,
        offsetX: 0,
        offsetY: 0
    },

    childrenInteractive: false,

    text: '',

    wrap: undefined,

    testString: '|MÉqgy',
});

x, y : Position of this dynamic-text game object.
width : Fixed width.
- A number : Width of this dynamic-text game object.
  - Wrap-width is width - padding.left - padding.right.
- undefined : Width of this dynamic-text game object will be set after invoked runWordWrap method.
height : Fixed height.
- A number : Height of this dynamic-text game object.
- undefined : Height of this dynamic-text game object will be set after invoked runWordWrap method.
padding : Padding of bounds.
- A number
- padding.left, padding.right, padding.top, padding.bottom
background : Properties of background round-rectangle.
- background.color : Fill color, number or string.
  - null : No filling.
- background.color2 : Gradient fill color, number or string.
  - null : No gradient filling.
- background.horizontalGradient : Horizontal or vertical gradient filling.
  - true : Horizontal gradient filling.
  - false : Vertical gradient filling.
- background.stroke : Stroke color, number or string.
  - null : No stroke.
- background.strokeThickness : Line width of stroke.
- background.cornerRadius : Corner-radius of round rectangle.
- background.cornerIteration : Iteration of corner-radius.
  - null : Draw corner-radius via arc directly.
  - A number : Draw corner-radius via lines
innerBounds : Properties of inner-bounds.
- innerBounds.color : Fill color, number or string.
  - null : No filling.
- innerBounds.color2 : Gradient fill color, number or string.
  - null : No gradient filling.
- innerBounds.horizontalGradient : Horizontal or vertical gradient filling.
  - true : Horizontal gradient filling.
  - false : Vertical gradient filling.
- innerBounds.stroke : Stroke color, number or string.
  - null : No stroke.
- innerBounds.strokeThickness : Line width of stroke.
style : Initial text-style.
- style.bold : Bold
- style.italic : Italic
- style.fontSize : Font size, number or string.
- style.fontFamily : Font family
- style.color : Fill color, number or string.
- style.stroke : Stroke color, number or string.
- style.strokeThickness : Line width of stroke.
- style.shadowColor : Shadow color, number or string.
  - null : No shadow.
- style.shadowOffsetX : OffsetX of shadow.
- style.shadowOffsetY : OffsetY of shadow.
- style.shadowBlur : Blur of shadow.
- style.backgroundColor : Background color of a character.
- style.backgroundHeight, style.backgroundBottomY : Background position and height of a character.
  - undefined, or null : Use height of character as background height. Default behavior.
- style.offsetX : OffsetX.
- style.offsetY : OffsetY.
- style.align : Override default line-alignment setting.
  - 0, 'left', 'top' : Align remainder lines to left/top.
  - 1, 'center' : Align remainder lines to center.
  - 2, 'right', 'bottom' : Align remainder lines to right/bottom.
  - undefined : Use default line-alignment setting.
childrenInteractive :
- true : Fire input events ('child.pointerdown', 'child.pointerup', 'child.pointerover', 'child.pointerout') of any child after text.setInteractive().
- false : Won't fire any input events of child. Default behavior.
text : Content of text.
wrap : Default configuration Horizontal/Vertical wrapping.
testString : Test string to get text ascent and text height with default text style.

or

var txt = scene.add.rexDynamicText(x, y, width, height, config);

or

var txt = scene.add.rexDynamicText(x, y, config);

Add dynamictext from JSON

var txt = scene.make.rexDynamicText({
    x: 0,
    y: 0,

    // origin: {x: 0.5, y: 0.5},
    // fill: null,

    add: true
});

Custom class¶

Define class

class MyDynamicText extends DynamicText {
    constructor(scene, x, y, width, height, config)) {
        super(scene, x, y, width, height, config));
        // ...
        scene.add.existing(this);
    }
    // ...

    // preUpdate(time, delta) {}
}

scene.add.existing(gameObject) : Adds an existing Game Object to this Scene.
- If the Game Object renders, it will be added to the Display List.
- If it has a preUpdate method, it will be added to the Update List.

Create instance

var txt = new MyDynamicText(scene, x, y, config);

Clear content¶

txt.clearContent();

Text¶

Append text¶

txt.appendText(text);

or

txt.appendText(text, 
    {
        // bold: false,
        // italic: false,
        // fontSize: '16px',
        // fontFamily: 'Courier',
        // color: '#fff',
        // stroke: '#fff',
        // strokeThickness: 0,
        // shadowColor: null,
        // shadowOffsetX: 0,
        // shadowOffsetY: 0,
        // shadowBlur: 0,
        // backgroundColor: null,
        // backgroundHeight: undefined,
        // backgroundBottomY: undefined,
        // offsetY: 0,
        // offsetY: 0,
        // align: undefined
    }
);

To overwrite some properties of text-style.

Each character will be placed at position (0,0), without rotation. Uses word-wrap method to rearrange position of characters.

Set text¶

txt.setText(text);

or

txt.setText(text, 
    {
        // bold: false,
        // italic: false,
        // fontSize: '16px',
        // fontFamily: 'Courier',
        // color: '#fff',
        // stroke: '#fff',
        // strokeThickness: 0,
        // shadowColor: null,
        // shadowOffsetX: 0,
        // shadowOffsetY: 0,
        // shadowBlur: 0,
        // backgroundColor: null,
        // backgroundHeight: undefined,
        // backgroundBottomY: undefined,
        // offsetY: 0,
        // offsetY: 0,
        // align: undefined
    }
);

Insert text¶

txt.insertText(index, text);

or

txt.insertText(index, text, 
    {
        // bold: false,
        // italic: false,
        // fontSize: '16px',
        // fontFamily: 'Courier',
        // color: '#fff',
        // stroke: '#fff',
        // strokeThickness: 0,
        // shadowColor: null,
        // shadowOffsetX: 0,
        // shadowOffsetY: 0,
        // shadowBlur: 0,
        // backgroundColor: null,
        // backgroundHeight: undefined,
        // backgroundBottomY: undefined,
        // offsetY: 0,
        // offsetY: 0,
        // align: undefined
    }
);

Remove text¶

txt.removeText(index);

Get text¶

Get active characters

var text = txt.text;

or

var text = txt.getText();

Get all characters
```
var text = txt.getText(false);
```

Image¶

Append image¶

txt.appendImage(key, frame, {
    // width: ,
    // height: ,
    // scaleX: ,
    // scaleY: ,
    // color: ,
})

width : Scaled-width. Aspect-ratio will be kept if no height, or scaleY is set.
height : Scaled-height. Aspect-ratio will be kept if no width, or scaleX is set.
color : Tint-fill color. Default is undefined.

Background¶

Fill style

txt.setBackgroundColor(color);
// txt.setBackgroundColor(color, color2, isHorizontalGradient);

Stroke style

txt.setBackgroundStroke(color, lineWidth);

Corner radius

txt.setBackgroundCornerRadius(radius);
// txt.setBackgroundCornerRadius(radius, iteration)

Inner bounds¶

Fill style

txt.setInnerBoundsColor(color);
// txt.setInnerBoundsColor(color, color2, isHorizontalGradient);

Stroke style

txt.setInnerBoundsStroke(color, lineWidth);

Wrap¶

Control characters :

'\n' : New line
'\f' : Page break

Horizontal wrap¶

var result = txt.runWordWrap({
    padding: {
        left: 0,
        right: 0,
        top: 0,
        bottom: 0
    },
    ascent: undefined,
    lineHeight: undefined,
    useDefaultTextHeight: false,
    maxLines: undefined,
    wrapWidth: undefined,
    letterSpacing: 0,
    hAlign: 0,
    vAlign: 0,
    charWrap: false
});

padding :
- padding.top, padding.bottom, padding.left, padding.right : Extra space around lines.
ascent, lineHeight : Height of first line and remainder lines
- ascent will set to lineHeight if ascent is undefined but lineHeight is not undefined (backward compatible)
- Get ascent, lineHeight from default text style and test string, if ascent, lineHeight are both undefined
useDefaultTextHeight : If parameter lineHeight is not given,
- false : Set line height to (total line height / maxLines), if parameter maxLines is larger than 0. Default behavior.
- true : Set line height to default text height.
maxLines : Lines number of this page.
- 0 : Wrapping whole content.
- undefined : It will be set if lineHeight and height is given
wrapWidth : Width of wrapping
letterSpacing : Space between each character.
hAlign : Horizontal alignment.
- 0, or 'left' : Align to left bound.
- 1, or 'center' : Align to center.
- 2, or 'right' : Align to right bound.
vAlign : Vertical alignment.
- 0, or 'top' : Align to top bound.
- 1, or 'center' : Align to center.
- 2, or 'bottom' : Align to bottom bound.
charWrap
- false : Word wrap. Default behavior.
- true : Character wrap.

Align¶

Set vertical align mode
```
txt.setVAlign(vAlign);
```
- vAlign : Vertical alignment.
  - 0, or 'top' : Align to top bound.
  - 1, or 'center' : Align to center.
  - 2, or 'bottom' : Align to bottom bound.
Set horizontal align mode
```
txt.setHAlign(hAlign);
```
- hAlign : Horizontal alignment.
  - 0, or 'left' : Align to left bound.
  - 1, or 'center' : Align to center.
  - 2, or 'right' : Align to right bound.

Test string¶

txt.setTestString(text);

Vertical wrap¶

var result = txt.runVerticalWrap({
    padding: {
        top: 0,
        left: 0,
        right: 0,
        bottom: 0
    },
    lineWidth: undefined,
    maxLines: undefined,
    fixedChildHeight: undefined,
    charPerLine: undefined,
    wrapHeight: undefined,
    letterSpacing: 0,
    rtl: true,
    hAlign: 0,
    vAlign: 0,
});

padding :
- padding.top, padding.bottom, padding.left, padding.right : Extra space around lines.
lineWidth : Line width.
- undefined : It will be set if maxLines and fixedWidth is given.
maxLines : Lines number of this page.
- 0 : Wrapping whole content.
- undefined : It will be set if lineWidth and fixedWidth is given.
fixedChildHeight : Each character has the same fixed height.
- undefined : Get fixedChildHeight according to charPerLine parameter. Or use height of each character if fixedChildHeight and charPerLine parameters are undefined.
charPerLine : Amount of characters in each line, to get fixedChildHeight.
wrapHeight : Height of wrapping
letterSpacing : Space between each character.
rtl :
- true : Place lines from right to left.
- false : Place lines from left to right.
hAlign : Horizontal alignment.
- 0, or 'left' : Align to left bound. Default value if rtl is set to false.
- 1, or 'center' : Align to center.
- 2, or 'right' : Align to right bound. Default value if rtl is set to true.
vAlign : Vertical alignment.
- 0, or 'top' : Align to top bound.
- 1, or 'center' : Align to center.
- 2, or 'bottom' : Align to bottom bound.

Result¶

{
    children: [],
    lines: [],
    isLastPage: false
}

children : Character/Image data in this page.
lines : Array of line data. A line data contains
```
{
    children: [],
    width: 0,     // Horizontal-wrapping
    height: 0,    // Vertical-wrapping.        
}
```
- children : Character/Image data in this line.
- width : Width of this line, in result of horizontal-wrapping.
- height : Height of this line, in result of vertical-wrapping.
isLastPage :
- false : Run txt.runWordWrap(result)/txt.runVerticalWrap(result) to get next page of word-wrapping result.
- true : No remainder of characters.

Wrap next page¶

var result = txt.runWordWrap(prevResult);

prevResult : Result of previous word-wraping.
result : Current result of word-wraping.

Default configuration of wrapping¶

txt.setWrapConfig(config);

config : Default configuration Horizontal/Vertical wrapping.

Scroll content¶

Scroll content by setting textOX, textOY members

Set

txt.setTextOXY(x, y).updateTexture();    
// txt.setTextOX(x).updateTexture();
// txt.setTextOY(x).updateTexture();

or

txt.addTextOXY(incX, incY).updateTexture(); 
// txt.addTextOX(incX).updateTexture(); 
// txt.addTextOY(incY).updateTexture();

or

txt.textOX = x;
txt.textOY = y;
txt.updateTexture();

Get

var ox = txt.textOX;
var oy = txt.textOY;

Child¶

General properties¶

Visible :

Get
```
var visible = child.visible;
```

Set

child.setVisible();
// child.visible = true;

or

child.setVisible(false);  // Set to invisible
// child.visible = false;

Alpha

Get
```
var alpha = child.alpha;
```

Set

child.setAlpha(alpha);
// child.alpha = alpha;

Position :

Get
```
var x = child.x;
var y = child.y;
```

Set

child.setPosition(x, y);
// child.x = x;
// child.y = y;

Angle :

Get

var degrees = child.angle;
// var radians = child.rotation;

Set

child.setAngle(degrees);
child.setRotation(radians);
// child.angle = degrees;
// child.rotation = radians;

Scale

Get

var scaleX = child.scaleX;
var scaleY = child.scaleY;

Set

child.setScale(scaleX, scaleY);
// child.scaleX = scaleX;
// child.scaleY = scaleY;

Draw callbacks

Set

child.setDrawBelowCallback(callback);
child.setDrawAboveCallback(callback);

callback :

function(child) {
    var text = child.text;                
    var context = child.context;
    // ...
}

World position

var worldXY = child.getWorldPosition();
// out = child.getWorldPosition(out);

or

var worldXY = txt.getCharWorldPosition(char);
// out = txt.getCharWorldPosition(char, out);

Character¶

Text-style¶

Get

var bold = char.style.bold;
var italic = char.style.italic;
var fontSize = char.style.fontSize;
var fontFamily = char.style.fontFamily;
var color = char.style.color;
var stroke = char.style.stroke;
var strokeThickness = char.style.strokeThickness;
var shaodwColor = char.style.shadowColor;
var shadowBlur = char.style.shadowBlur;
var shadowOffsetX = char.style.shadowOffsetX;
var shadowOffsetY = char.style.shadowOffsetY;
var backgroundColor = char.style.backgroundColor;
var backgroundHeight = char.style.backgroundHeight;
var backgroundBottomY = char.style.backgroundBottomY;
var xOffset = char.style.x;
var yOffset = char.style.y;

Set

char.modifyStyle({
    // bold: false,
    // italic: false,
    // fontSize: '16px',
    // fontFamily: 'Courier',
    // color: '#fff',
    // stroke: '#fff',
    // strokeThickness: 0,
    // shaodwColor: null,
    // shadowBlur: 0,
    // shadowOffsetX: 0,
    // shadowOffsetY: 0,
    // backgroundColor: null,
    // backgroundHeight: undefined,
    // backgroundBottomY: undefined,
    // offsetX: 0,
    // offsetY: 0
})

or

char.setBold();
// char.setBold(false);

char.setItalic();
// char.setItalic(false);

char.setFontSize(fontSize); // number, string

char.setFontFamily(fontFamily);

char.setColor(color); // number, string
// char.setColor(); // No filling color

char.setStrokeStyle(color, thickness);
// char.setStrokeStyle();  // No stroke

char.setShadowColor(color);
// char.setShadowColor();  // No shadow

char.setShadowOffset(offsetX, offsetY);

char.setShadowBlur(blur);

char.setBackgroundColor(color);
// char.setBackgroundColor();  // No shadow

char.setOffsetX(offsetX);
char.setOffsetY(offsetY);

Image¶

Size

Get

var width = image.width;
var height = image.height;

Set

image.setWidth(width);
// image.setWidth(width, true);  // Resize and keep aspect- ratio
image.setHeight(height);
// image.setHeight(height, true);  // Resize and keep aspect- ratio

For each child¶

Any child

For each active child

txt.forEachChild(function(child, childIndex){
}, scope)

For each character child

txt.forEachChild(function(child, childIndex){
}, scope, false);

Renderable child

For each active renderable child

txt.forEachRenderableChild(function(child, charIndex){
}, scope)

For each renderable child

txt.forEachRenderableChild(function(child, charIndex){
}, scope, false);

Character child

For each active character child

txt.forEachCharChild(function(child, charIndex){
}, scope)

For each character child

txt.forEachCharChild(function(child, charIndex){
}, scope, false);

Get children¶

Get all children
```
var children = txt.getChildren();
```

Get last appended children

var children = txt.getLastAppendedChildren();

Get active children, after wrapping

var children = txt.getActiveChildren();

Get character children¶

Get active character children
```
var children = txt.getCharChildren();
```

Get all character children

var children = txt.getCharChildren(false);

Get character child by character index

var child = txt.getCharChild(charIndex);

Move child¶

Move child to fist
```
txt.moveChildToFist(child);
```
Move child to last
```
txt.moveChildToLast(child);
```
Move child up
```
txt.movechildUp(child);
```
Move child to down
```
txt.movechildDown(child);
```
Move child above another child
```
txt.movechildAbove(child, baseChild);
```
Move child below another child
```
txt.movechildBelow(child, baseChild);
```

Size¶

Resize canvas size
```
txt.setCanvasSize(width, height)
```

Reisze text wrapping size and canvas size.

txt.setSize(width, height);

or

txt.setFixedSize(width, height);

Resize to minimun size to show all visible characters.
```
txt.setToMinSize();
```

Input events of child¶

Enable input events of child on config of constructor, or via method
```
txt.setChildrenInteractiveEnable();
```

Pointer down/up on child

txt.on('child.pointerdown', function(child, pointer, localX, localY, event) {        
})

txt.on('child.pointerup', function(child, pointer, localX, localY, event) {        
})

child : Any Character or Image child

Pointer over/out on child

txt.on('child.pointerover', function(child, pointer, localX, localY, event) {        
})

txt.on('child.pointerout', function(child, pointer, localX, localY, event) {        
})

child : Any Character or Image child

Other properties¶

See game object

Create mask¶

var mask = txt.createBitmapMask();

See mask

Shader effects¶

Support preFX and postFX effects

Compare with other kinds of text game object¶

Built-in text:
- Single color per game object.
- Draw content line by line.
- Best render performance.
BBCode text:
- Multiple colors, multiple font size per gaem object.
- Draw content segment by segment.
- Slower than built-in text game object.
Dynamic text:
- Multiple colors, multiple font size per gaem object.
- Draw content character by character.
- Slower than bbcode text game object.