mirror of
https://github.com/gdamore/tcell.git
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80a58b9089
This supports both terminfo (Linux, macOS) terminals, and the legacy Windows console. Perversely, the "modern" Windows terminal doesn't support application initiated resizing yet.
102 lines
2.3 KiB
Go
102 lines
2.3 KiB
Go
//go:build ignore
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// +build ignore
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// Copyright 2022 The TCell Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use file except in compliance with the License.
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// You may obtain a copy of the license at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"fmt"
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"os"
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"github.com/gdamore/tcell/v2"
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"github.com/gdamore/tcell/v2/encoding"
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"github.com/mattn/go-runewidth"
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)
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func emitStr(s tcell.Screen, x, y int, style tcell.Style, str string) {
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for _, c := range str {
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var comb []rune
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w := runewidth.RuneWidth(c)
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if w == 0 {
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comb = []rune{c}
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c = ' '
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w = 1
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}
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s.SetContent(x, y, c, comb, style)
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x += w
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}
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}
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func displayDemo(s tcell.Screen) {
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w, h := s.Size()
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s.Clear()
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style := tcell.StyleDefault.Foreground(tcell.ColorCadetBlue.TrueColor()).Background(tcell.ColorWhite)
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sizeStr := fmt.Sprintf("%d x %d", w, h)
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helpStr := "Use cursors to resize, ESC to exit."
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emitStr(s, (w-len(sizeStr))/2, h/2, style, sizeStr)
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emitStr(s, (w-len(helpStr))/2, h/2+1, tcell.StyleDefault, helpStr)
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s.Show()
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}
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// This program just prints "Hello, World!". Press ESC to exit.
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func main() {
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encoding.Register()
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s, e := tcell.NewScreen()
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if e != nil {
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fmt.Fprintf(os.Stderr, "%v\n", e)
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os.Exit(1)
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}
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if e := s.Init(); e != nil {
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fmt.Fprintf(os.Stderr, "%v\n", e)
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os.Exit(1)
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}
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defStyle := tcell.StyleDefault.
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Background(tcell.ColorBlack).
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Foreground(tcell.ColorWhite)
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s.SetStyle(defStyle)
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displayDemo(s)
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for {
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switch ev := s.PollEvent().(type) {
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case *tcell.EventResize:
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s.Sync()
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displayDemo(s)
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case *tcell.EventKey:
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switch ev.Key() {
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case tcell.KeyEscape:
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s.Fini()
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os.Exit(0)
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case tcell.KeyRight:
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w, h := s.Size()
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s.SetSize(w+1, h)
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case tcell.KeyLeft:
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w, h := s.Size()
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s.SetSize(w-1, h)
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case tcell.KeyUp:
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w, h := s.Size()
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s.SetSize(w, h-1)
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case tcell.KeyDown:
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w, h := s.Size()
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s.SetSize(w, h+1)
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}
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}
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}
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}
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