# NHL-DPainter

This repo is a school project for Design Patterns.

use 'dub' to compile and run the code.

# Useful draw functions for `Context` type

- `fill()`: fill path, then forget path.

- `fillPreserve()`: fill path, retain path.

- `fillExtends()`, `strokeExtends()` & `pathExtends()`: return corners
(whatever that may be).

- `stroke()`: draw line on path, then forget path.

- `strokePreserve()`: should be obvious.

- `moveTo()`: Move/Pan path.

- `scale()`: Scale path.

- `newPath()`: Clear path from context.

- `showText()`: Write text with Cairo.

# Entities

`Shapes` are stored in a `Command`. Each `Command` is saved in `History`.

`Groups` are stored in `Global.groups`.

The rendering of `Entities` is done through `History`. First are
all `Commands` rendered with a `foreach`-loop. Then all `Groups`
in `Global.groups` are rendered with a `foreach`-loop.

If a `Shape` is added to a `Group`, The `Shape` is unable to save itself
anymore. From that point, `Group` has the task to save itself, including
all it's members. The ability to save is determined by the `saveable`
variable.

# Roadmap

- Delete group? Hoe?

- Grafische indicatie van een groep. De groepen worden wel goed weergegeven,
maar subgroepen niet.

- Groups worden nog niet goed geladen: ze verliezen hun kleurtje.

- Decorator moet nog 'group' en 'active' correct implementeren.