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https://github.com/gdamore/tcell.git
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5889c5f171
This causes colors that are set that are low numbered to be treated as themed colors -- basically honoring the palette of the terminal. The Style and Color implementations have changed quite a bit to permit growth -- the colors are now 64-bits wide to permit using the upper bits as flags, and to leave room for a future alpha channel. There is a new TrueColor() method on colors that obtains the value as strict RGB value, and this will be used in lieu of whatever terminal colors are provided -- giving the application full control over the color space if they want, without forcibly clobbering user preferences for terminals for the vast majority of cases. Indexed colors are created with the new PaletteColor API.
119 lines
2.5 KiB
Go
119 lines
2.5 KiB
Go
// +build ignore
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// Copyright 2015 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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// boxes just displays random colored boxes on your terminal screen.
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// Press ESC to exit the program.
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package main
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import (
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"fmt"
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"math/rand"
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"os"
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"time"
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"github.com/gdamore/tcell/v2"
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)
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func makebox(s tcell.Screen) {
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w, h := s.Size()
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if w == 0 || h == 0 {
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return
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}
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glyphs := []rune{'@', '#', '&', '*', '=', '%', 'Z', 'A'}
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lx := rand.Int() % w
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ly := rand.Int() % h
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lw := rand.Int() % (w - lx)
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lh := rand.Int() % (h - ly)
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st := tcell.StyleDefault
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gl := ' '
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if s.Colors() > 256 {
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rgb := tcell.NewHexColor(int32(rand.Int() & 0xffffff))
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st = st.Background(rgb)
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} else if s.Colors() > 1 {
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st = st.Background(tcell.Color(rand.Int() % s.Colors()) | tcell.ColorValid)
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} else {
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st = st.Reverse(rand.Int()%2 == 0)
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gl = glyphs[rand.Int()%len(glyphs)]
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}
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for row := 0; row < lh; row++ {
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for col := 0; col < lw; col++ {
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s.SetCell(lx+col, ly+row, st, gl)
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}
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}
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s.Show()
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}
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func main() {
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tcell.SetEncodingFallback(tcell.EncodingFallbackASCII)
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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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s.SetStyle(tcell.StyleDefault.
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Foreground(tcell.ColorBlack).
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Background(tcell.ColorWhite))
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s.Clear()
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quit := make(chan struct{})
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go func() {
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for {
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ev := s.PollEvent()
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switch ev := ev.(type) {
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case *tcell.EventKey:
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switch ev.Key() {
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case tcell.KeyEscape, tcell.KeyEnter:
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close(quit)
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return
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case tcell.KeyCtrlL:
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s.Sync()
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}
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case *tcell.EventResize:
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s.Sync()
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}
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}
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}()
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cnt := 0
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dur := time.Duration(0)
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loop:
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for {
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select {
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case <-quit:
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break loop
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case <-time.After(time.Millisecond * 50):
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}
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start := time.Now()
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makebox(s)
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cnt++
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dur += time.Now().Sub(start)
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}
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s.Fini()
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fmt.Printf("Finished %d boxes in %s\n", cnt, dur)
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fmt.Printf("Average is %0.3f ms / box\n", (float64(dur)/float64(cnt))/1000000.0)
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}
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