# plot-gtk-ui

[![Build Status](https://travis-ci.org/sumitsahrawat/plot-gtk-ui.svg)](https://travis-ci.org/sumitsahrawat/plot-gtk-ui)

An ambitious attempt to provide mathematica like dynamic plotting for free.

## Installation

```bash
stack install plot-gtk-ui
```

## Usage

> The best way to try this is to use the [calculator](https://github.com/sumitsahrawat/calculator.git) package.

Import `Graphics.Rendering.Plot.Gtk.UI` and follow the examples below. 

```haskell
import Graphics.UI.Gtk
import Graphics.Rendering.Plot.Gtk.UI

main = do
  initGUI
  plotStatic sin (-pi, pi)
  -- Plot sin(x) from -pi to pi
  mainGUI
```

![sinx](screenshots/sinx.png)

Another simple example.

```haskell
import Graphics.UI.Gtk
import Graphics.Rendering.Plot.Gtk.UI

main = do
  initGUI
  plotDynamic (\(x, a) -> sin(a * x)) ((-pi, pi), (0, 1))
  -- Plot sin(a * x), where 'x' ranges from -pi to
  -- pi and 'a' ranges between 0 to 1
  mainGUI
```

![sinax](screenshots/sinax.png)

## Errors

The error messages might not be completely correct, as there is not a good way to diagnose what caused the error.

Issues that cause errors:

- Invalid ranges, e.g. X-Range = `(1, -1)`
- Automatic-determination of ranges resulting in unplottable ranges, e.g. `(0, 0)`

If you land on the "Gray screen of no plots" or any other incorrect error message, please raise an issue here.

## Implementation

The `plotStatic` and `plotDynamic` functions are implemented in a
type-safe manner using `fixed-vector`.

It also allows one to write functions using appropriate tuples as in the
above examples.

Plotting is done using the excellent [plot](https://github.com/amcphail/plot)
package.