text

Documentation

Overview

Package text is a simple text component with customisable content, size, colour, location and font.

Index

• type Component
  • func (component Component) GetJSONFormat() interface{}
  • func (component Component) SetNamedProperties(properties render.NamedProperties) (render.Component, error)
  • func (component Component) VerifyAndSetJSONData(data interface{}) (render.Component, render.NamedProperties, error)
  • func (component Component) Write(canvas render.Canvas) (c render.Canvas, err error)

Types

type Component

type Component struct {
	/*
		NamedPropertiesMap maps user/application variables to properties of the component.
		This field is filled automatically by VerifyAndSetJSONData, then used in
		SetNamedProperties to determine whether a variable being passed in is relevant to this
		component.

		For example, map[string][]string{"username": []string{"content"}} would indicate that
		the user specified variable "username" will fill the Content property.
	*/
	NamedPropertiesMap map[string][]string
	// Content is the text to render.
	Content string
	// Start is the coordinates of the dot relative to the top-left corner of the canvas.
	Start image.Point
	// Size is the size of the text in points.
	Size float64
	// MaxWidth is the maximum number of horizontal pixels the dot can move before scaling text.
	MaxWidth int
	// cutils.TextAlignment aligns text to the left, right or centre.
	TextAlignment cutils.TextAlignment
	// Font is the typeface to use.
	Font *truetype.Font
	// Colour is the colour of the text.
	Colour color.NRGBA
	// contains filtered or unexported fields
}

Component implements the Component interface for text.

func (Component) GetJSONFormat

func (component Component) GetJSONFormat() interface{}

GetJSONFormat returns the JSON structure of a text component.

func (Component) SetNamedProperties

func (component Component) SetNamedProperties(properties render.NamedProperties) (render.Component, error)

SetNamedProperties processes the named properties and sets them into the text properties.

func (Component) VerifyAndSetJSONData

func (component Component) VerifyAndSetJSONData(data interface{}) (render.Component, render.NamedProperties, error)

VerifyAndSetJSONData processes the data parsed from JSON and uses it to set text properties and fill the named properties map.

func (Component) Write

func (component Component) Write(canvas render.Canvas) (c render.Canvas, err error)

Write draws text on the canvas.