Add CircularProgress widget and related renderer

This commit adds a new widget called CircularProgress, along with its corresponding renderer. The CircularProgress widget is a circular progress indicator that can be used in Fyne applications. It includes methods to start and stop the progress animation.

The commit also includes a new function called detect_interfaces, which is an alternate to ipconfig/ifconfig. This function detects the available addresses for dispatching.

The changes in this commit aim to enhance the functionality and user experience of the application.

custom.go

@@ -0,0 +1,88 @@
+package main
+
+import (
+	"image/color"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/canvas"
+
+	// "fyne.io/fyne/v2/driver/desktop"
+	"fyne.io/fyne/v2/theme"
+	"fyne.io/fyne/v2/widget"
+
+	// "math"
+	"time"
+)
+
+type CircularProgress struct {
+    widget.BaseWidget
+    progress float64
+    running  bool
+}
+
+func NewCircularProgress() *CircularProgress {
+    c := &CircularProgress{}
+    c.ExtendBaseWidget(c)
+    return c
+}
+
+func (c *CircularProgress) CreateRenderer() fyne.WidgetRenderer {
+    circle := canvas.NewCircle(theme.PrimaryColor())
+    circle.StrokeWidth = 5
+    circle.StrokeColor = theme.PrimaryColor()
+    return &circularProgressRenderer{circle: circle, progress: c}
+}
+
+func (c *CircularProgress) Start() {
+    c.running = true
+    go func() {
+        for c.running {
+            c.progress += 0.01
+            if c.progress > 1 {
+                c.progress = 0
+            }
+            c.Refresh()
+            time.Sleep(50 * time.Millisecond)
+        }
+    }()
+}
+
+func (c *CircularProgress) Stop() {
+    c.running = false
+}
+
+type circularProgressRenderer struct {
+    circle   *canvas.Circle
+    progress *CircularProgress
+}
+
+func (r *circularProgressRenderer) Layout(size fyne.Size) {
+    r.circle.Resize(size)
+    r.circle.Move(fyne.NewPos(0, 0))
+}
+
+func (r *circularProgressRenderer) MinSize() fyne.Size {
+    return fyne.NewSize(50, 50)
+}
+
+func (r *circularProgressRenderer) Refresh() {
+    _ = 360 * r.progress.progress
+    r.circle.StrokeWidth = 5
+    r.circle.StrokeColor = theme.PrimaryColor()
+    r.circle.FillColor = theme.BackgroundColor()
+    r.circle.Refresh()
+    r.circle.StrokeWidth = 5
+    r.circle.StrokeColor = theme.PrimaryColor()
+    r.circle.FillColor = theme.BackgroundColor()
+    r.circle.Refresh()
+}
+
+func (r *circularProgressRenderer) BackgroundColor() color.Color {
+    return theme.BackgroundColor()
+}
+
+func (r *circularProgressRenderer) Objects() []fyne.CanvasObject {
+    return []fyne.CanvasObject{r.circle}
+}
+
+func (r *circularProgressRenderer) Destroy() {}