package event import ( "github.com/sqshq/sampler/component" "github.com/sqshq/sampler/config" "github.com/sqshq/sampler/console" ui "github.com/sqshq/termui" "time" ) const ( refreshRateToRenderRateRatio = 0.6 ) type Handler struct { layout *component.Layout renderTicker *time.Ticker consoleEvents <-chan ui.Event renderRate time.Duration } func NewHandler(layout *component.Layout) Handler { renderRate := calcMinRenderRate(layout) return Handler{ layout: layout, consoleEvents: ui.PollEvents(), renderTicker: time.NewTicker(renderRate), renderRate: renderRate, } } func (h *Handler) HandleEvents() { // initial render ui.Render(h.layout) pause := false for { select { case mode := <-h.layout.ChangeModeEvents: h.handleModeChange(mode) case <-h.renderTicker.C: ui.Render(h.layout) case e := <-h.consoleEvents: switch e.ID { case console.KeyQuit, console.KeyExit: h.handleExit() return case console.KeyPause: pause = !pause // TODO move to layout, since it will show PAUSE sign in status line, pause/unpause can be sent via channel case console.SignalResize: payload := e.Payload.(ui.Resize) h.layout.ChangeDimensions(payload.Width, payload.Height) default: h.layout.HandleConsoleEvent(e.ID) } } } } func (h *Handler) handleModeChange(m component.Mode) { // render change before switching the tickers ui.Render(h.layout) h.renderTicker.Stop() if m == component.ModeDefault { h.renderTicker = time.NewTicker(h.renderRate) } else { h.renderTicker = time.NewTicker(console.MinRenderInterval) } } func (h *Handler) handleExit() { var settings []config.ComponentSettings for _, c := range h.layout.Components { settings = append(settings, config.ComponentSettings{Type: c.Type, Title: c.Title, Size: c.Size, Position: c.Position}) } config.Update(settings) } func calcMinRenderRate(layout *component.Layout) time.Duration { minRefreshRateMs := layout.Components[0].RefreshRateMs for _, c := range layout.Components { if c.RefreshRateMs < minRefreshRateMs { minRefreshRateMs = c.RefreshRateMs } } renderRate := time.Duration( int(float64(minRefreshRateMs)*refreshRateToRenderRateRatio)) * time.Millisecond if renderRate < console.MinRenderInterval { return console.MinRenderInterval } if renderRate > console.MaxRenderInterval { return console.MaxRenderInterval } return renderRate }