1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// Demo code for the TextArea primitive.
package main
import (
"fmt"
"github.com/gdamore/tcell/v2"
"github.com/rivo/tview"
)
func main() {
app := tview.NewApplication()
textArea := tview.NewTextArea().
SetPlaceholder("Enter text here...")
textArea.SetTitle("Text Area").SetBorder(true)
helpInfo := tview.NewTextView().
SetText(" Press F1 for help, press Ctrl-C to exit")
position := tview.NewTextView().
SetDynamicColors(true).
SetTextAlign(tview.AlignRight)
pages := tview.NewPages()
updateInfos := func() {
fromRow, fromColumn, toRow, toColumn := textArea.GetCursor()
if fromRow == toRow && fromColumn == toColumn {
position.SetText(fmt.Sprintf("Row: [yellow]%d[white], Column: [yellow]%d ", fromRow, fromColumn))
} else {
position.SetText(fmt.Sprintf("[red]From[white] Row: [yellow]%d[white], Column: [yellow]%d[white] - [red]To[white] Row: [yellow]%d[white], To Column: [yellow]%d ", fromRow, fromColumn, toRow, toColumn))
}
}
textArea.SetMovedFunc(updateInfos)
updateInfos()
mainView := tview.NewGrid().
SetRows(0, 1).
AddItem(textArea, 0, 0, 1, 2, 0, 0, true).
AddItem(helpInfo, 1, 0, 1, 1, 0, 0, false).
AddItem(position, 1, 1, 1, 1, 0, 0, false)
help1 := tview.NewTextView().
SetDynamicColors(true).
SetText(`[green]Navigation
[yellow]Left arrow[white]: Move left.
[yellow]Right arrow[white]: Move right.
[yellow]Down arrow[white]: Move down.
[yellow]Up arrow[white]: Move up.
[yellow]Ctrl-A, Home[white]: Move to the beginning of the current line.
[yellow]Ctrl-E, End[white]: Move to the end of the current line.
[yellow]Ctrl-F, page down[white]: Move down by one page.
[yellow]Ctrl-B, page up[white]: Move up by one page.
[yellow]Alt-Up arrow[white]: Scroll the page up.
[yellow]Alt-Down arrow[white]: Scroll the page down.
[yellow]Alt-Left arrow[white]: Scroll the page to the left.
[yellow]Alt-Right arrow[white]: Scroll the page to the right.
[yellow]Alt-B, Ctrl-Left arrow[white]: Move back by one word.
[yellow]Alt-F, Ctrl-Right arrow[white]: Move forward by one word.
[blue]Press Enter for more help, press Escape to return.`)
help2 := tview.NewTextView().
SetDynamicColors(true).
SetText(`[green]Editing[white]
Type to enter text.
[yellow]Ctrl-H, Backspace[white]: Delete the left character.
[yellow]Ctrl-D, Delete[white]: Delete the right character.
[yellow]Ctrl-K[white]: Delete until the end of the line.
[yellow]Ctrl-W[white]: Delete the rest of the word.
[yellow]Ctrl-U[white]: Delete the current line.
[blue]Press Enter for more help, press Escape to return.`)
help3 := tview.NewTextView().
SetDynamicColors(true).
SetText(`[green]Selecting Text[white]
Move while holding Shift or drag the mouse.
Double-click to select a word.
[yellow]Ctrl-L[white] to select entire text.
[green]Clipboard
[yellow]Ctrl-Q[white]: Copy.
[yellow]Ctrl-X[white]: Cut.
[yellow]Ctrl-V[white]: Paste.
[green]Undo
[yellow]Ctrl-Z[white]: Undo.
[yellow]Ctrl-Y[white]: Redo.
[blue]Press Enter for more help, press Escape to return.`)
help := tview.NewFrame(help1).
SetBorders(1, 1, 0, 0, 2, 2)
help.SetBorder(true).
SetTitle("Help").
SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
if event.Key() == tcell.KeyEscape {
pages.SwitchToPage("main")
return nil
} else if event.Key() == tcell.KeyEnter {
switch {
case help.GetPrimitive() == help1:
help.SetPrimitive(help2)
case help.GetPrimitive() == help2:
help.SetPrimitive(help3)
case help.GetPrimitive() == help3:
help.SetPrimitive(help1)
}
return nil
}
return event
})
pages.AddAndSwitchToPage("main", mainView, true).
AddPage("help", tview.NewGrid().
SetColumns(0, 64, 0).
SetRows(0, 22, 0).
AddItem(help, 1, 1, 1, 1, 0, 0, true), true, false)
app.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
if event.Key() == tcell.KeyF1 {
pages.ShowPage("help") //TODO: Check when clicking outside help window with the mouse. Then clicking help again.
return nil
}
return event
})
if err := app.SetRoot(pages,
true).EnableMouse(true).Run(); err != nil {
panic(err)
}
}
|
