### Basic Go GUI Application with Spot

Source: https://github.com/roblillack/spot/blob/main/README.md

This example demonstrates a minimal 'Hello World' GUI application using the Spot toolkit in Go. It initializes the UI, mounts a root component, and uses the 'UseState' hook to manage a counter that reactively updates a button's title. The application creates a window with a clickable button that increments a counter.

```go
package main

import (
	"fmt"

	"github.com/roblillack/spot"
	"github.com/roblillack/spot/ui"
)

func main() {
	ui.Init()

	spot.MountFn(func(ctx *spot.RenderContext) spot.Component {
		counter, setCounter := spot.UseState[int](ctx, 0)

		buttonTitle := "Click me!"
		if counter > 0 {
			buttonTitle = fmt.Sprintf("Clicked %d times!", counter)
		}

		return &ui.Window{
			Title:  "Hello World!",
			Width:  200,
			Height: 125,
			Children: []spot.Component{
				&ui.Button{
					X: 25, Y: 50, Width: 150, Height: 25,
					Title: buttonTitle,
					OnClick: func() {
						setCounter(counter + 1)
					},
				},
			},
		}
	})

	ui.Run()
}
```

--------------------------------

### APIDOC: Window UI Control

Source: https://github.com/roblillack/spot/blob/main/README.md

Control representing a (top-level) window on the screen.

```Go
Go Package: github.com/roblillack/spot/ui#Window
```

```FLTK
FLTK Control: Fl_Window (https://www.fltk.org/doc-1.4/classFl__Window.html)
```

```AppKit
AppKit Control: NSWindow (https://developer.apple.com/documentation/appkit/nswindow)
```

--------------------------------

### APIDOC: TextField UI Control

Source: https://github.com/roblillack/spot/blob/main/README.md

Control for single-line text input.

```Go
Go Package: github.com/roblillack/spot/ui#TextField
```

```FLTK
FLTK Control: Fl_Input (https://www.fltk.org/doc-1.4/classFl__Input.html)
```

```AppKit
AppKit Control: NSTextField (https://developer.apple.com/documentation/appkit/nstextfield)
```

--------------------------------

### APIDOC: Spinner UI Control

Source: https://github.com/roblillack/spot/blob/main/README.md

Number input control with up/down buttons.

```Go
Go Package: github.com/roblillack/spot/ui#Spinner
```

```FLTK
FLTK Control: Fl_Spinner (https://www.fltk.org/doc-1.4/classFl__Spinner.html)
```

```AppKit
AppKit Control: NSTextField (https://developer.apple.com/documentation/appkit/nstextfield) + NSStepper (https://developer.apple.com/documentation/appkit/nsstepper)
```

--------------------------------

### APIDOC: ProgressBar UI Control

Source: https://github.com/roblillack/spot/blob/main/README.md

Progress bar control to visualize the progression of a long-running operation.

```Go
Go Package: github.com/roblillack/spot/ui#ProgressBar
```

```FLTK
FLTK Control: Fl_Progress (https://www.fltk.org/doc-1.4/classFl__Progress.html)
```

```AppKit
AppKit Control: NSProgressIndicator (https://developer.apple.com/documentation/appkit/nsprogressindicator)
```

--------------------------------

### APIDOC: TextEditor UI Control

Source: https://github.com/roblillack/spot/blob/main/README.md

General-purpose text box to edit multi-line text content.

```Go
Go Package: github.com/roblillack/spot/ui#TextEditor
```

```FLTK
FLTK Control: Fl_Text_Editor (https://www.fltk.org/doc-1.4/classFl__Text__Editor.html)
```

```AppKit
AppKit Control: NSTextView (https://developer.apple.com/documentation/appkit/nstextview)
```

--------------------------------

### APIDOC: Slider UI Control

Source: https://github.com/roblillack/spot/blob/main/README.md

Horizontal slider input control.

```Go
Go Package: github.com/roblillack/spot/ui#Slider
```

```FLTK
FLTK Control: Fl_Slider (https://www.fltk.org/doc-1.4/classFl__Slider.html)
```

```AppKit
AppKit Control: NSSlider (https://developer.apple.com/documentation/appkit/nsslider)
```

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