Common help code into HelpfulWidget

wtf/helpful_widget.go

@@ -0,0 +1,39 @@
+package wtf
+
+import (
+	"github.com/rivo/tview"
+)
+
+type HelpfulWidget struct {
+	app      *tview.Application
+	helpText string
+	pages    *tview.Pages
+	view     *tview.TextView
+}
+
+func NewHelpfulWidget(app *tview.Application, pages *tview.Pages, helpText string) HelpfulWidget {
+	widget := HelpfulWidget{
+		app:      app,
+		helpText: helpText,
+		pages:    pages,
+	}
+
+	return widget
+}
+
+func (widget *HelpfulWidget) SetView(view *tview.TextView) {
+	widget.view = view
+}
+
+func (widget *HelpfulWidget) ShowHelp() {
+	closeFunc := func() {
+		widget.pages.RemovePage("help")
+		widget.app.SetFocus(widget.view)
+	}
+
+	modal := NewBillboardModal(widget.helpText, closeFunc)
+
+	widget.pages.AddPage("help", modal, false, true)
+	widget.app.SetFocus(modal)
+	widget.app.Draw()
+}