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Save tuanchauict/304bc45e749c37dff7606f64f83074a5 to your computer and use it in GitHub Desktop.
MonoSketch presentation. (Download monosketch-presentation.mono and open with https://app.monosketch.io/ for interaction version)
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  / / ___  / /_( )  ___      ____  ____ ___  ___ _ / /_ ___      
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\_,_/ /_//_/     /_/ |_|/___/  \___/  /___/  /___/       
     __                       _                     __              __
 ___/ /  ____ ___ _ _    __  (_)  ___   ___ _      / /_ ___  ___   / /
/ _  /  / __// _ `/| |/|/ / / /  / _ \ / _ `/     / __// _ \/ _ \ / / 
\_,_/  /_/   \_,_/ |__,__/ /_/  /_//_/ \_, /      \__/ \___/\___//_/  
                                      /___/                           
╦ ╦┬ ┬┬ ┬  ╦  ┌┬┐┌─┐┌┬┐┌─┐  ┌┬┐┬ ┬┬┌─┐┌─┐
║║║├─┤└┬┘  ║  │││├─┤ ││├┤    │ ├─┤│└─┐ ┌┘
╚╩╝┴ ┴ ┴   ╩  ┴ ┴┴ ┴─┴┘└─┘   ┴ ┴ ┴┴└─┘ o 
I love drawing charts with ASCII.
Ishikawa san introduced me MonoDraw and helped me to request the license purchase
from the company.
Unfortunately, I didn't know the WF was approved and there was a license for me.
I didn't want to pay $10 for the license myself
(because I thought it was simple software.)
I decided to code it myself.
It ends up spending almost 1 year to finish the first version
(and I also realized my MonoDraw license was purchased, 1 year ago (;_;)
╔═╗┌─┐┌─┐┌┐┌┌┬┐┌─┐
╠═╣│ ┬├┤ │││ ││├─┤
╩ ╩└─┘└─┘┘└┘─┴┘┴ ┴
1. How to draw
   How to draw with ASCII
2. How to connect canvas, mouse, and others
╦ ╦┌─┐┬ ┬  ┌┬┐┌─┐  ┌┬┐┬─┐┌─┐┬ ┬
╠═╣│ ││││   │ │ │   ││├┬┘├─┤│││
╩ ╩└─┘└┴┘   ┴ └─┘  ─┴┘┴└─┴ ┴└┴┘
1. We have a canvas size WxH
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ ┃
┃ ┃
┃ ┃
┃ ┃
┃ ┃
┃ Canvas WxH ┃
┃ ┃
┃ ┃
┃ 280 x 100 = 28,000 characters ┃
┃ (4K 27 inch monitor) ┃
┃ ┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
It's slow to generate and draw 28k characters for every frame
2. The actual working size is bigger (infinity)
┌ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ┐
│ │
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
│ ┃WxH ┃ │
┃ ┃
│ ┃ ╔═════════╗ ┃ │
┃ ║Hello ║ ┃
│ ┃ ║world! ║ ┃ │
┃ ╚═════════╝ ┃
│ ┃ ┃ │
┃ ┃
│ ┃ ┃ │
┃ ┃
│ ┃ ┃ │
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
│ │
│ │
│ │
─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─
It's impossible to create a matrix matching the size of
the working space
┌ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ┐
│ │
Solution: Break into small rectangles
│ ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ │
┃wxh │ │ │ │ │ │ │ ┃
│ ┃ ┃ │
┃ │ ╔═════════╗ │ │ │ │ ┃
│ ┃─ ─ ─ ─║Hello ─ ─║─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─┃ │
┃ │ ║world! ║ │ │ │ │ ┃
│ ┃ ╚═════════╝ ┃ │
┃ │ │ │ │ │ │ │ ┃
│ ┃─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─┃ │
┃ │ │ │ │ │ │ │ ┃
│ ┃ ┃ │
┃ │ │ │ │ │ │ │ ┃
│ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ │
│ MonoSketch uses 16x16 unit matrix, and  │
a HashMap<position, matrix> for storing infinity working space
│ │
─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─
┌────────────┐ ┌─────────────┐ ┌──────────────────────────┐
│Add/Update │ │Generate │ │Calculate position of all │
│shape ├─────▶│shape's ASCII├─────▶│"pixel" and distribute to │
│ │ │Bitmap │ │corespondent matrices │
│ │ │ │ │ │
└────────────┘ └─────────────┘ └────────────┬─────────────┘
┌────────────────────────┐ ┌──────────────┐
│Draw visible matrices │ │Update matrix │
│onto canvas │◀──────┤ │
│ │ │ │
│ │ │ │
└────────────────────────┘ └──────────────┘
┌ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ┐
│ │
Actual allocated matrices
│ ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ │
┃wxh░░│░░░░░│░░░░░│ │ │ │ │ ┃
│ ┃░░░░░ ░░░░░ ░░░░░ ┃ │
┃░░░░░│░╔═════════╗ │ │ │ │ ┃
│ ┃─ ─ ─ ─║Hello ─ ─║─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─┃ │
┃ │░║world!░░░║ │ │ │ │ ┃
│ ┃ ░╚═════════╝ ┃ │
┃ │░░░░░│░░░░░│ │ │ │ │ ┃
│ ┃─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─┃ │
┃ │ │ │ │ │ │ │ ┃
│ ┃ ┃ │
┃ │ │ │ │ │ │ │ ┃
│ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ │
│ │
│ │
─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─ ─
Static kinds of stuff like rulers, grid,
(*) and selection indicators are
separated from the main canvas for shapes
3. How to draw ASCII
┌──────────┐ ┏━━━━━━━━━━┓ ╔══════════╗
│ │ ┃ ┃ ║ ║
│ │ ┃ ┃ ║ ║
└──────────┘ ┗━━━━━━━━━━┛ ╚══════════╝
■───────────────────────────────────▶
○ ━ ━ ━ ━ ━ ━ ━ ━ ━ ━ ━ ━ ━ ━ ━ ━ ━ ◎
It's quite straightforward when drawing ASCII characters on canvas with
canvas.drawText(...). With the above structure, we can convert a shape
into a "bitmap" and then apply the bitmap to the matrices
However, when the shapes collide,...
┌──────────┐
│ │
┌──────────┤ │
│ │ │
│ ├──┬───────┴──┐
│ │ │ │
└──────────┘ │ │
│ │
└──────────┘
┌────────────┐ ┌─────────────┐ ┌──────────────────────────┐
│Add/Update │ │Generate │ │Calculate position of all │
│shape ├─────▶│shape's ASCII├─────▶│"pixel" and distribute to │
│ │ │Bitmap │ │corespondent matrices │
│ │ │ │ │ │
└────────────┘ └─────────────┘ └─────────────────────┬────┘
┌────────────────────────┐ ┌──────────────┐ ┌───────────┐
│Draw visible matrices │ │Update matrix │ │Handle │
│onto canvas │◀──────┤ │ ◀──────┤"pixel" │
│ │ │ │ │collision │
│ │ │ │ │ │
└────────────────────────┘ └──────────────┘ └───────────┘
(*) I don't have a good solution for this question
yet. MonoSketch resolves this by adding a
database of pairs and how it will be when a
collision happens
(*) Diagonal lines are not supported yet
╦ ╦┌─┐┬ ┬  ┌┬┐┌─┐  ┌─┐┌─┐┌┐┌┌┐┌┌─┐┌─┐┌┬┐  ╔═╗┌─┐┌┐┌┬  ┬┌─┐┌─┐ 
╠═╣│ ││││   │ │ │  │  │ │││││││├┤ │   │   ║  ├─┤│││└┐┌┘├─┤└─┐ 
╩ ╩└─┘└┴┘   ┴ └─┘  └─┘└─┘┘└┘┘└┘└─┘└─┘ ┴   ╚═╝┴ ┴┘└┘ └┘ ┴ ┴└─┘┘
╔╦╗┌─┐┬ ┬┌─┐┌─┐   ┌─┐┌┐┌┌┬┐  ╔═╗┌┬┐┬ ┬┌─┐┬─┐┌─┐  
║║║│ ││ │└─┐├┤    ├─┤│││ ││  ║ ║ │ ├─┤├┤ ├┬┘└─┐  
╩ ╩└─┘└─┘└─┘└─┘┘  ┴ ┴┘└┘─┴┘  ╚═╝ ┴ ┴ ┴└─┘┴└─└─┘  
▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒
▒MonoSketch▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒████▒ ▒ ▒ ▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒ ▒
▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒
┌───────────────────────────────────────────────────┐░░░░░░░░░░░░░░░░░░
│ │░░░░░░░░░░░░░░░░░░
│ │░░Select░a░shape░░
│ │░░░░░░░░...░░░░░░░
│    _        │░░░░░░░░░░░░░░░░░░
│  (( )_ (    │░░░░░░░░░░░░░░░░░░
│  <;___)_)   │░░░░░░░░░░░░░░░░░░
│    " "    │░░░░░░░░░░░░░░░░░░
│ ▲ │░░░░░░░░░░░░░░░░░░
│ │ │░░░░░░░░░░░░░░░░░░
│ mouse │░░░░░░░░░░░░░░░░░░
│ │░░░░░░░░░░░░░░░░░░
│ │░░░░░░░░░░░░░░░░░░
│ │░░░░░░░░░░░░░░░░░░
│ │░░░░░░░░░░░░░░░░░░
└───────────────────────────────────────────────────┘░░░░░░GitHub░░░░░░
Similar to other editor tools, MonoSketch uses the Command pattern for
User Actions
Example
┌───────┐ ┌────────────┐ ┌────────────┐
│ │ │ │ │ │
│ Mouse ├────────▶│Detect mouse├────────▶│Create mouse│
│ down │ │ action │ │ command │
│ │ │ │ │ │
└───────┘ └────────────┘ └────────────┘
- Select shape
- Start drawing a Rectangle/Text/Line
- Mark "done" a command
- etc.
The command will be sent to a... LiveData
to notify to mouse event handler
(*) When I started developing this feature, coroutine
Flow was not well supported on Kotlin/JS
The same structure is used for Shapes, each shape
has a "version" flag
┌─────────┐ ┌─────────────┐ ┌─────────────┐ ║
│Update │ │Change the │ │Repeat update│ ║ ┌─────────────────────┐
│shape ├────▶│shape's ├────▶│the parent │ ║ │Group │
│ │ │version │ │shape version│ ║ │ │
└─────────┘ └─────────────┘ └──────┬──────┘ ║ │ │
│ ║ │ ┌───┐ ┌───┐ │
▼ ║ │ │▒▒▒│ │███│ │
┌────────────────┐ ┌─────────────┐ ║ │ └───┘ └───┘ │
│Update Shapes' │ │Collect all │ ║ │ │
│bitmap │◀────┤affected │ ║ │ │
│ │ │shapes │ ║ │ │
└────────────────┘ └──────┬──────┘ ║ │ │
│ ║ │ │
▼ ║ └─────────────────────┘
┌─────────────┐ ┌─────────────┐ ║
│ │ │Notify root's│ ║
│Draw │◀───────────────────┤version │ ║
│ │ │changed │ ║
└─────────────┘ └─────────────┘ ║
LiveData ║
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