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88 lines
92 KiB
Go
88 lines
92 KiB
Go
2 years ago
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// Demo code for the Image primitive.
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package main
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import (
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"bytes"
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"encoding/base64"
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"image/jpeg"
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"image/png"
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"github.com/gdamore/tcell/v2"
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"github.com/rivo/tview"
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)
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const (
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beach = `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chart = `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)
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func main() {
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app := tview.NewApplication()
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image := tview.NewImage()
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b, _ := base64.StdEncoding.DecodeString(beach)
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photo, _ := jpeg.Decode(bytes.NewReader(b))
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b, _ = base64.StdEncoding.DecodeString(chart)
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graphics, _ := png.Decode(bytes.NewReader(b))
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image.SetImage(photo)
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imgType := tview.NewList().
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ShowSecondaryText(false).
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AddItem("Photo", "", 0, func() { image.SetImage(photo) }).
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AddItem("Graphics", "", 0, func() { image.SetImage(graphics) })
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imgType.SetTitle("Image Type").SetBorder(true)
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colors := tview.NewList().
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ShowSecondaryText(false).
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AddItem("2 colors", "", 0, func() { image.SetColors(2) }).
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AddItem("8 colors", "", 0, func() { image.SetColors(8) }).
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AddItem("256 colors", "", 0, func() { image.SetColors(256) }).
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AddItem("True-color", "", 0, func() { image.SetColors(tview.TrueColor) })
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colors.SetTitle("Colors").SetBorder(true)
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for i, c := range []int{2, 8, 256, tview.TrueColor} {
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if c == image.GetColors() {
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colors.SetCurrentItem(i)
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break
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}
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}
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dithering := tview.NewList().
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ShowSecondaryText(false).
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AddItem("None", "", 0, func() { image.SetDithering(tview.DitheringNone) }).
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AddItem("Floyd-Steinberg", "", 0, func() { image.SetDithering(tview.DitheringFloydSteinberg) }).
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SetCurrentItem(1)
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dithering.SetTitle("Dithering").SetBorder(true)
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selections := []*tview.Box{imgType.Box, colors.Box, dithering.Box}
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for i, box := range selections {
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(func(index int) {
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box.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
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switch event.Key() {
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case tcell.KeyTab:
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app.SetFocus(selections[(index+1)%len(selections)])
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return nil
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case tcell.KeyBacktab:
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app.SetFocus(selections[(index+len(selections)-1)%len(selections)])
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return nil
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}
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return event
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})
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})(i)
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}
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grid := tview.NewGrid().
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SetBorders(false).
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SetColumns(18, -1).
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SetRows(4, 6, 4, -1).
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AddItem(imgType, 0, 0, 1, 1, 0, 0, true).
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AddItem(colors, 1, 0, 1, 1, 0, 0, false).
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AddItem(dithering, 2, 0, 1, 1, 0, 0, false).
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AddItem(image, 0, 1, 4, 1, 0, 0, false)
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if err := app.SetRoot(grid, true).EnableMouse(true).Run(); err != nil {
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panic(err)
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}
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}
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