1 package main
2
3 import (
4 "fmt"
5 "strconv"
6 "time"
7
8 "github.com/gdamore/tcell/v2"
9 "github.com/rivo/tview"
10 )
11
12 const textView1 = `[green]func[white] [yellow]main[white]() {
13 app := tview.[yellow]NewApplication[white]()
14 textView := tview.[yellow]NewTextView[white]().
15 [yellow]SetTextColor[white](tcell.ColorYellow).
16 [yellow]SetScrollable[white](false).
17 [yellow]SetChangedFunc[white]([yellow]func[white]() {
18 app.[yellow]Draw[white]()
19 })
20 [green]go[white] [yellow]func[white]() {
21 [green]var[white] n [green]int
22 [white] [yellow]for[white] {
23 n++
24 fmt.[yellow]Fprintf[white](textView, [red]"%d "[white], n)
25 time.[yellow]Sleep[white]([red]200[white] * time.Millisecond)
26 }
27 }()
28 app.[yellow]SetRoot[white](textView, true).
29 [yellow]Run[white]()
30 }`
31
32
33 func TextView1(nextSlide func()) (title string, content tview.Primitive) {
34 textView := tview.NewTextView().
35 SetTextColor(tcell.ColorYellow).
36 SetScrollable(false).
37 SetDoneFunc(func(key tcell.Key) {
38 nextSlide()
39 })
40 textView.SetChangedFunc(func() {
41 if textView.HasFocus() {
42 app.Draw()
43 }
44 })
45 go func() {
46 var n int
47 for {
48 if textView.HasFocus() {
49 n++
50 if n > 512 {
51 n = 1
52 textView.SetText("")
53 }
54
55 fmt.Fprintf(textView, "%d ", n)
56 time.Sleep(200 * time.Millisecond)
57 } else {
58 time.Sleep(time.Second)
59 }
60 }
61 }()
62 textView.SetBorder(true).SetTitle("TextView implements io.Writer")
63 return "Text 1", Code(textView, 36, 13, textView1)
64 }
65
66 const textView2 = `[green]package[white] main
67
68 [green]import[white] (
69 [red]"strconv"[white]
70
71 [red]"github.com/gdamore/tcell/v2"[white]
72 [red]"github.com/rivo/tview"[white]
73 )
74
75 [green]func[white] [yellow]main[white]() {
76 ["0"]textView[""] := tview.[yellow]NewTextView[white]()
77 ["1"]textView[""].[yellow]SetDynamicColors[white](true).
78 [yellow]SetWrap[white](false).
79 [yellow]SetRegions[white](true).
80 [yellow]SetDoneFunc[white]([yellow]func[white](key tcell.Key) {
81 highlights := ["2"]textView[""].[yellow]GetHighlights[white]()
82 hasHighlights := [yellow]len[white](highlights) > [red]0
83 [yellow]switch[white] key {
84 [yellow]case[white] tcell.KeyEnter:
85 [yellow]if[white] hasHighlights {
86 ["3"]textView[""].[yellow]Highlight[white]()
87 } [yellow]else[white] {
88 ["4"]textView[""].[yellow]Highlight[white]([red]"0"[white]).
89 [yellow]ScrollToHighlight[white]()
90 }
91 [yellow]case[white] tcell.KeyTab:
92 [yellow]if[white] hasHighlights {
93 current, _ := strconv.[yellow]Atoi[white](highlights[[red]0[white]])
94 next := (current + [red]1[white]) % [red]9
95 ["5"]textView[""].[yellow]Highlight[white](strconv.[yellow]Itoa[white](next)).
96 [yellow]ScrollToHighlight[white]()
97 }
98 [yellow]case[white] tcell.KeyBacktab:
99 [yellow]if[white] hasHighlights {
100 current, _ := strconv.[yellow]Atoi[white](highlights[[red]0[white]])
101 next := (current - [red]1[white] + [red]9[white]) % [red]9
102 ["6"]textView[""].[yellow]Highlight[white](strconv.[yellow]Itoa[white](next)).
103 [yellow]ScrollToHighlight[white]()
104 }
105 }
106 })
107 fmt.[yellow]Fprint[white](["7"]textView[""], content)
108 tview.[yellow]NewApplication[white]().
109 [yellow]SetRoot[white](["8"]textView[""], true).
110 [yellow]Run[white]()
111 }`
112
113
114 func TextView2(nextSlide func()) (title string, content tview.Primitive) {
115 codeView := tview.NewTextView().
116 SetWrap(false)
117 fmt.Fprint(codeView, textView2)
118 codeView.SetBorder(true).SetTitle("Buffer content")
119
120 textView := tview.NewTextView()
121 textView.SetDynamicColors(true).
122 SetWrap(false).
123 SetRegions(true).
124 SetDoneFunc(func(key tcell.Key) {
125 if key == tcell.KeyEscape {
126 nextSlide()
127 return
128 }
129 highlights := textView.GetHighlights()
130 hasHighlights := len(highlights) > 0
131 switch key {
132 case tcell.KeyEnter:
133 if hasHighlights {
134 textView.Highlight()
135 } else {
136 textView.Highlight("0").
137 ScrollToHighlight()
138 }
139 case tcell.KeyTab:
140 if hasHighlights {
141 current, _ := strconv.Atoi(highlights[0])
142 next := (current + 1) % 9
143 textView.Highlight(strconv.Itoa(next)).
144 ScrollToHighlight()
145 }
146 case tcell.KeyBacktab:
147 if hasHighlights {
148 current, _ := strconv.Atoi(highlights[0])
149 next := (current - 1 + 9) % 9
150 textView.Highlight(strconv.Itoa(next)).
151 ScrollToHighlight()
152 }
153 }
154 })
155 fmt.Fprint(textView, textView2)
156 textView.SetBorder(true).SetTitle("TextView output")
157 return "Text 2", tview.NewFlex().
158 AddItem(textView, 0, 1, true).
159 AddItem(codeView, 0, 1, false)
160 }
161
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