mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-25 19:28:57 +01:00
110 lines
2.5 KiB
Go
110 lines
2.5 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.
|
|
|
|
//go:build example
|
|
// +build example
|
|
|
|
package main
|
|
|
|
import (
|
|
"log"
|
|
"strings"
|
|
|
|
"github.com/hajimehoshi/ebiten/v2"
|
|
"github.com/hajimehoshi/ebiten/v2/ebitenutil"
|
|
"github.com/hajimehoshi/ebiten/v2/inpututil"
|
|
)
|
|
|
|
const (
|
|
screenWidth = 640
|
|
screenHeight = 480
|
|
)
|
|
|
|
// 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
|
|
}
|
|
|
|
type Game struct {
|
|
runes []rune
|
|
text string
|
|
counter int
|
|
}
|
|
|
|
func (g *Game) Update() error {
|
|
// Add runes that are input by the user by AppendInputChars.
|
|
// Note that AppendInputChars result changes every frame, so you need to call this
|
|
// every frame.
|
|
g.runes = ebiten.AppendInputChars(g.runes[:0])
|
|
g.text += string(g.runes)
|
|
|
|
// Adjust the string to be at most 10 lines.
|
|
ss := strings.Split(g.text, "\n")
|
|
if len(ss) > 10 {
|
|
g.text = strings.Join(ss[len(ss)-10:], "\n")
|
|
}
|
|
|
|
// If the enter key is pressed, add a line break.
|
|
if repeatingKeyPressed(ebiten.KeyEnter) || repeatingKeyPressed(ebiten.KeyNumpadEnter) {
|
|
g.text += "\n"
|
|
}
|
|
|
|
// If the backspace key is pressed, remove one character.
|
|
if repeatingKeyPressed(ebiten.KeyBackspace) {
|
|
if len(g.text) >= 1 {
|
|
g.text = g.text[:len(g.text)-1]
|
|
}
|
|
}
|
|
|
|
g.counter++
|
|
return nil
|
|
}
|
|
|
|
func (g *Game) Draw(screen *ebiten.Image) {
|
|
// Blink the cursor.
|
|
t := g.text
|
|
if g.counter%60 < 30 {
|
|
t += "_"
|
|
}
|
|
ebitenutil.DebugPrint(screen, t)
|
|
}
|
|
|
|
func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
|
|
return screenWidth, screenHeight
|
|
}
|
|
|
|
func main() {
|
|
g := &Game{
|
|
text: "Type on the keyboard:\n",
|
|
counter: 0,
|
|
}
|
|
|
|
ebiten.SetWindowSize(screenWidth, screenHeight)
|
|
ebiten.SetWindowTitle("TypeWriter (Ebitengine Demo)")
|
|
if err := ebiten.RunGame(g); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
}
|