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108 lines
2.3 KiB
108 lines
2.3 KiB
/*
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A presentation of the cview package, implemented with cview.
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Navigation
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The presentation will advance to the next slide when the primitive demonstrated
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in the current slide is left (usually by hitting Enter or Escape). Additionally,
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the following shortcuts can be used:
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- Ctrl-N: Jump to next slide
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- Ctrl-P: Jump to previous slide
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*/
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package main
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import (
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"flag"
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"fmt"
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"log"
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"net/http"
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_ "net/http/pprof"
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"strconv"
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"code.rocketnine.space/tslocum/cview"
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"github.com/gdamore/tcell/v2"
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)
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// Slide is a function which returns the slide's main primitive and its title.
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// It receives a "nextSlide" function which can be called to advance the
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// presentation to the next slide.
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type Slide func(nextSlide func()) (title string, content cview.Primitive)
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// The application.
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var app = cview.NewApplication()
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// Starting point for the presentation.
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func main() {
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var debugPort int
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flag.IntVar(&debugPort, "debug", 0, "port to serve debug info")
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flag.Parse()
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if debugPort > 0 {
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go func() {
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log.Fatal(http.ListenAndServe(fmt.Sprintf("localhost:%d", debugPort), nil))
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}()
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}
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app.EnableMouse(true)
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// The presentation slides.
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slides := []Slide{
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Cover,
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Introduction,
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Colors,
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TextView1,
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TextView2,
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InputField,
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Slider,
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Form,
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Table,
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TreeView,
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Flex,
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Grid,
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Window,
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End,
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}
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panels := cview.NewTabbedPanels()
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// Create the pages for all slides.
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previousSlide := func() {
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slide, _ := strconv.Atoi(panels.GetCurrentTab())
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slide = (slide - 1 + len(slides)) % len(slides)
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panels.SetCurrentTab(strconv.Itoa(slide))
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}
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nextSlide := func() {
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slide, _ := strconv.Atoi(panels.GetCurrentTab())
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slide = (slide + 1) % len(slides)
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panels.SetCurrentTab(strconv.Itoa(slide))
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}
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cursor := 0
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var slideRegions []int
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for index, slide := range slides {
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slideRegions = append(slideRegions, cursor)
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title, primitive := slide(nextSlide)
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panels.AddTab(strconv.Itoa(index), title, primitive)
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cursor += len(title) + 4
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}
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panels.SetCurrentTab("0")
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// Shortcuts to navigate the slides.
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app.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
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if event.Key() == tcell.KeyCtrlN {
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nextSlide()
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} else if event.Key() == tcell.KeyCtrlP {
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previousSlide()
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}
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return event
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})
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// Start the application.
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app.SetRoot(panels, true)
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if err := app.Run(); err != nil {
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panic(err)
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}
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}
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