add 'gadgets'

    attempt func (n *gui.Node) blah() definition
    better docs for pkg.go.dev
    how logging should work
    fix syntax links for pkg.go.dev

Signed-off-by: Jeff Carr <[email protected]>

1 files changed, 79 insertions, 0 deletions

diff --git a/gadgets/durationSlider.go b/gadgets/durationSlider.go
new file mode 100644
index 0000000..6f81214
--- /dev/null
+++ b/gadgets/durationSlider.go
@@ -0,0 +1,79 @@
+/*
+	A slider that goes between a High and Low time
+*/
+
+package gadgets
+
+import 	(
+	"log"
+	"fmt"
+	"time"
+
+	"go.wit.com/gui"
+)
+
+type Duration struct {
+	p	*gui.Node	// parent widget
+	l	*gui.Node	// label widget
+	s	*gui.Node	// slider widget
+
+	Label	string
+	Low	time.Duration
+	High	time.Duration
+	Duration	time.Duration
+
+	Custom	func()
+}
+
+func (n *Duration) Set(d time.Duration) {
+	var timeRange, step, offset time.Duration
+
+	if (d > n.High) {
+		d = n.High
+	}
+	if (d < n.Low) {
+		d = n.Low
+	}
+
+	// set the duration
+	n.Duration = d
+
+	// figure out the integer offset for the Slider GUI Widget
+	timeRange = n.High - n.Low
+	step = timeRange / 1000
+	if (step == 0) {
+		log.Println("duration.Set() division by step == 0", n.Low, n.High, timeRange, step)
+		n.s.Set(0)
+		return
+	}
+	offset = d - n.Low
+	i := int(offset / step)
+	log.Println("duration.Set() =", n.Low, n.High, d, "i =", i)
+	n.s.I = i
+	n.s.Set(i)
+	n.s.Custom()
+}
+
+func NewDurationSlider(n *gui.Node, label string, low time.Duration, high time.Duration) *Duration {
+	d := Duration {
+		p: n,
+		Label: label,
+		High: high,
+		Low: low,
+	}
+
+	// various timeout settings
+	d.l = n.NewLabel(label)
+	d.s = n.NewSlider(label, 0, 1000)
+	d.s.Custom = func () {
+		d.Duration = low + (high - low) * time.Duration(d.s.I) / 1000
+		log.Println("d.Duration =", d.Duration)
+		s := fmt.Sprintf("%s (%v)", d.Label, d.Duration)
+		d.l.SetText(s)
+		if (d.Custom != nil) {
+			d.Custom()
+		}
+	}
+
+	return &d
+}