mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 05:12:18 +02:00
93 lines
2.1 KiB
Go
93 lines
2.1 KiB
Go
// Copyright 2017 The Ebiten Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// +build example jsgo
|
|
|
|
package main
|
|
|
|
import (
|
|
"log"
|
|
"strings"
|
|
|
|
"github.com/hajimehoshi/ebiten"
|
|
"github.com/hajimehoshi/ebiten/ebitenutil"
|
|
"github.com/hajimehoshi/ebiten/inpututil"
|
|
)
|
|
|
|
var (
|
|
text = "Type on the keyboard:\n"
|
|
counter = 0
|
|
)
|
|
|
|
// repeatingKeyPressed return true when key is pressed considering the repeat state.
|
|
func repeatingKeyPressed(key ebiten.Key) bool {
|
|
const (
|
|
delay = 30
|
|
interval = 3
|
|
)
|
|
d := inpututil.KeyPressDuration(key)
|
|
if d == 1 {
|
|
return true
|
|
}
|
|
if d >= delay && (d-delay)%interval == 0 {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
func update(screen *ebiten.Image) error {
|
|
// Add a string from InputChars, that returns string input by users.
|
|
// Note that InputChars result changes every frame, so you need to call this
|
|
// every frame.
|
|
text += string(ebiten.InputChars())
|
|
|
|
// Adjust the string to be at most 10 lines.
|
|
ss := strings.Split(text, "\n")
|
|
if len(ss) > 10 {
|
|
text = strings.Join(ss[len(ss)-10:], "\n")
|
|
}
|
|
|
|
// If the enter key is pressed, add a line break.
|
|
if repeatingKeyPressed(ebiten.KeyEnter) || repeatingKeyPressed(ebiten.KeyKPEnter) {
|
|
text += "\n"
|
|
}
|
|
|
|
// If the backspace key is pressed, remove one character.
|
|
if repeatingKeyPressed(ebiten.KeyBackspace) {
|
|
if len(text) >= 1 {
|
|
text = text[:len(text)-1]
|
|
}
|
|
}
|
|
|
|
counter++
|
|
|
|
if ebiten.IsDrawingSkipped() {
|
|
return nil
|
|
}
|
|
|
|
// Blink the cursor.
|
|
t := text
|
|
if counter%60 < 30 {
|
|
t += "_"
|
|
}
|
|
ebitenutil.DebugPrint(screen, t)
|
|
return nil
|
|
}
|
|
|
|
func main() {
|
|
if err := ebiten.Run(update, 320, 240, 2.0, "Typewriter (Ebiten Demo)"); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|