Method subscribers

termdash.go:212–244

subscribers subscribes event receivers that live in this package to EDS.

()

// subscribers subscribes event receivers that live in this package to EDS.
func (td *termdash) subscribers() {
	// Handler for all errors that occur during input event processing.
	td.eds.Subscribe([]terminalapi.Event{terminalapi.NewError("")}, func(ev terminalapi.Event) {
		td.handleError(ev.(*terminalapi.Error).Error())
	})

	// Handles terminal resize events.
	td.eds.Subscribe([]terminalapi.Event{&terminalapi.Resize{}}, func(terminalapi.Event) {
		td.setClearNeeded()
	})

	// Redraws the screen on Keyboard and Mouse events.
	// These events very likely change the content of the widgets (e.g. zooming
	// a LineChart) so a redraw is needed to make that visible.
	td.eds.Subscribe([]terminalapi.Event{
		&terminalapi.Keyboard{},
		&terminalapi.Mouse{},
	}, func(terminalapi.Event) {
		td.evRedraw()
	}, event.MaxRepetitive(0)) // No repetitive events that cause terminal redraw.

	// Keyboard and Mouse subscribers specified via options.
	if td.keyboardSubscriber != nil {
		td.eds.Subscribe([]terminalapi.Event{&terminalapi.Keyboard{}}, func(ev terminalapi.Event) {
			td.keyboardSubscriber(ev.(*terminalapi.Keyboard))
		})
	}
	if td.mouseSubscriber != nil {
		td.eds.Subscribe([]terminalapi.Event{&terminalapi.Mouse{}}, func(ev terminalapi.Event) {
			td.mouseSubscriber(ev.(*terminalapi.Mouse))
		})
	}
}

// handleError forwards the error to the error handler if one was
// provided or panics.