flet-dstring 0.1.1

DString (Dynamic String) is a Python library that provides a simple and intuitive syntax for creating richly styled text in Flet applications.

DString

DString (Dynamic String) is a Python library that provides a simple and intuitive syntax for creating richly styled text in Flet applications. With DString, you can easily add colors, fonts, decorations, gradients, and other text styling effects to your Flet UI components.

Features

• Simple, intuitive syntax for text styling
• Support for multiple styling parameters
• Color gradients
• Font styling (size, family, weight)
• Text decorations (underline, overline, strikethrough)
• Spacing controls (letter spacing, word spacing)
• Text shadows
• Overflow handling
• Baseline control
• Combination of multiple styles
• Gradient text effects

Installation

pip install flet-dstring

Quick Start

import flet as ft
from flet_dstring import DString

def main(page: ft.Page):
    # Create styled text
    styled_text = "d[<f=ff6b6b,b>, <Hello>] d[<f=4ecdc4,i>, <World>]"
    text = DString(styled_text).to_flet()
  
    # Add to page
    page.add(text)

ft.app(target=main)

Syntax

The basic syntax for DString is:

d[<style_params>, <text>]

Multiple style parameters can be combined using commas. For example:

d[<f=ff6b6b,b,size=20>, <Hello World>]

Available Style Parameters

Parameter	Format	Description	Example
f	XXXXXX	Foreground color (hex)	f=ff6b6b
b	XXXXXX	Background color (hex)	b=000000
dc	XXXXXX	Decoration color (hex)	dc=ff0000
size	N	Font size (integer)	size=20
ff	name	Font family	ff=Arial
h	N	Height (float)	h=1.5
ls	N	Letter spacing (float)	ls=2
ws	N	Word spacing (float)	ws=10
dt	N	Decoration thickness (float)	dt=2
ds	style	Decoration style	ds=solid
d	type	Decoration type	d=underline
bl	type	Baseline	bl=alphabetic
o	type	Overflow	o=ellipsis
w	weight	Font weight	w=bold
shadow	color,x,y,blur,spread	Box shadow	shadow=000000,2,2,4,0
gs	XXXXXX	Gradient start color (hex)	gs=ff0000
ge	XXXXXX	Gradient end color (hex)	ge=0000ff
i	-	Italic	i
u	-	Underline	u
b	-	Bold	b

Style Values

Decoration Types

• underline
• overline
• line-through

Decoration Styles

• solid
• double
• dotted
• dashed
• wavy

Baseline Types

• alphabetic
• ideographic

Overflow Types

• clip
• ellipsis
• fade
• visible

Font Weights

• normal
• bold
• w100 through w900

Examples

Basic Styling

# Bold red text
"d[<f=ff6b6b,b>, <Bold Red Text>]"

# Italic green text
"d[<f=4ecdc4,i>, <Italic Green Text>]"

# Underlined blue text
"d[<f=45b7d1,u>, <Underlined Blue Text>]"

Colors and Sizes

# Large red text
"d[<f=ff0000,size=20>, <Large Red Text>]"

# Medium green text
"d[<f=00ff00,size=16>, <Medium Green Text>]"

# Small blue text
"d[<f=0000ff,size=12>, <Small Blue Text>]"

Text Decorations

# Solid underline
"d[<d=underline,ds=solid,dc=ff0000>, <Solid Underline>]"

# Dotted overline
"d[<d=overline,ds=dotted,dc=00ff00>, <Dotted Overline>]"

# Wavy strikethrough
"d[<d=line-through,ds=wavy,dc=0000ff>, <Wavy Strikethrough>]"

Gradients

# Basic gradient
"d[<gs=ff0000,ge=0000ff>, <Red to Blue Gradient>]"

# Styled gradient
"d[<gs=ff0000,ge=00ff00,size=24,b>, <Bold Gradient Text>]"

Complex Styling

text = (
    "d[<f=ff6b6b,w=bold,size=32,b=000000>, <Welcome>] to the "
    "d[<f=4ecdc4,i,ff=Arial>, <Extended>] "
    "d[<f=45b7d1,d=underline,ds=wavy,dc=ff0000>, <Styling>] "
    "d[<f=96ceb4,h=1.5>, <System>]!"
)

Configuration

You can customize the default behavior of DString using the DStringConfig class:

from flet_dstring import DString, DStringConfig

config = DStringConfig(
    default_color="ff0000",  # Default text color
    default_size=16,         # Default font size
    pattern=r"d\[<(.*?)>, <(.*?)>\]"  # Custom pattern
)

dstring = DString("d[<b>, <Hello>]", config)

Error Handling

DString provides several exception classes for error handling:

• DStringError: Base exception for DString-related errors
• DStringParseError: Raised when parsing a DString fails
• DStringStyleError: Raised when creating a text style fails

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License - see the LICENSE file for details.