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135 lines
4.1 KiB
Go
135 lines
4.1 KiB
Go
// Demo code for the TextArea primitive.
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package main
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import (
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"fmt"
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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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func main() {
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app := tview.NewApplication()
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textArea := tview.NewTextArea().
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SetWrap(false).
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SetPlaceholder("Enter text here...")
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textArea.SetTitle("Text Area").SetBorder(true)
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helpInfo := tview.NewTextView().
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SetText(" Press F1 for help, press Ctrl-C to exit")
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position := tview.NewTextView().
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SetDynamicColors(true).
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SetTextAlign(tview.AlignRight)
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pages := tview.NewPages()
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updateInfos := func() {
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fromRow, fromColumn, toRow, toColumn := textArea.GetCursor()
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if fromRow == toRow && fromColumn == toColumn {
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position.SetText(fmt.Sprintf("Row: [yellow]%d[white], Column: [yellow]%d ", fromRow, fromColumn))
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} else {
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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))
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}
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}
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textArea.SetMovedFunc(updateInfos)
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updateInfos()
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mainView := tview.NewGrid().
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SetRows(0, 1).
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AddItem(textArea, 0, 0, 1, 2, 0, 0, true).
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AddItem(helpInfo, 1, 0, 1, 1, 0, 0, false).
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AddItem(position, 1, 1, 1, 1, 0, 0, false)
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help1 := tview.NewTextView().
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SetDynamicColors(true).
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SetText(`[green]Navigation
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[yellow]Left arrow[white]: Move left.
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[yellow]Right arrow[white]: Move right.
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[yellow]Down arrow[white]: Move down.
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[yellow]Up arrow[white]: Move up.
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[yellow]Ctrl-A, Home[white]: Move to the beginning of the current line.
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[yellow]Ctrl-E, End[white]: Move to the end of the current line.
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[yellow]Ctrl-F, page down[white]: Move down by one page.
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[yellow]Ctrl-B, page up[white]: Move up by one page.
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[yellow]Alt-Up arrow[white]: Scroll the page up.
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[yellow]Alt-Down arrow[white]: Scroll the page down.
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[yellow]Alt-Left arrow[white]: Scroll the page to the left.
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[yellow]Alt-Right arrow[white]: Scroll the page to the right.
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[yellow]Alt-B, Ctrl-Left arrow[white]: Move back by one word.
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[yellow]Alt-F, Ctrl-Right arrow[white]: Move forward by one word.
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[blue]Press Enter for more help, press Escape to return.`)
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help2 := tview.NewTextView().
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SetDynamicColors(true).
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SetText(`[green]Editing[white]
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Type to enter text.
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[yellow]Ctrl-H, Backspace[white]: Delete the left character.
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[yellow]Ctrl-D, Delete[white]: Delete the right character.
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[yellow]Ctrl-K[white]: Delete until the end of the line.
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[yellow]Ctrl-W[white]: Delete the rest of the word.
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[yellow]Ctrl-U[white]: Delete the current line.
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[blue]Press Enter for more help, press Escape to return.`)
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help3 := tview.NewTextView().
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SetDynamicColors(true).
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SetText(`[green]Selecting Text[white]
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Move while holding Shift or drag the mouse.
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Double-click to select a word.
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[yellow]Ctrl-L[white] to select entire text.
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[green]Clipboard
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[yellow]Ctrl-Q[white]: Copy.
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[yellow]Ctrl-X[white]: Cut.
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[yellow]Ctrl-V[white]: Paste.
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[green]Undo
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[yellow]Ctrl-Z[white]: Undo.
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[yellow]Ctrl-Y[white]: Redo.
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[blue]Press Enter for more help, press Escape to return.`)
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help := tview.NewFrame(help1).
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SetBorders(1, 1, 0, 0, 2, 2)
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help.SetBorder(true).
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SetTitle("Help").
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SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
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if event.Key() == tcell.KeyEscape {
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pages.SwitchToPage("main")
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return nil
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} else if event.Key() == tcell.KeyEnter {
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switch {
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case help.GetPrimitive() == help1:
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help.SetPrimitive(help2)
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case help.GetPrimitive() == help2:
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help.SetPrimitive(help3)
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case help.GetPrimitive() == help3:
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help.SetPrimitive(help1)
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}
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return nil
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}
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return event
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})
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pages.AddAndSwitchToPage("main", mainView, true).
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AddPage("help", tview.NewGrid().
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SetColumns(0, 64, 0).
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SetRows(0, 22, 0).
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AddItem(help, 1, 1, 1, 1, 0, 0, true), true, false)
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app.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
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if event.Key() == tcell.KeyF1 {
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pages.ShowPage("help") //TODO: Check when clicking outside help window with the mouse. Then clicking help again.
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return nil
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}
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return event
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})
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if err := app.SetRoot(pages, true).EnableMouse(true).EnablePaste(true).Run(); err != nil {
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panic(err)
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}
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}
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