/
input.go
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/
input.go
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// Copyright 2022 The Ebitengine 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.
package ui
import (
"io/fs"
"unicode"
)
type MouseButton int
const (
MouseButton0 MouseButton = iota // The 'left' button
MouseButton1 // The 'right' button
MouseButton2 // The 'middle' button
MouseButton3 // The additional button (usually browser-back)
MouseButton4 // The additional button (usually browser-forward)
MouseButtonMax = MouseButton4
)
type TouchID int
type Touch struct {
ID TouchID
X int
Y int
}
type InputState struct {
KeyPressed [KeyMax + 1]bool
MouseButtonPressed [MouseButtonMax + 1]bool
CursorX int
CursorY int
WheelX float64
WheelY float64
Touches []Touch
Runes []rune
WindowBeingClosed bool
DroppedFiles fs.FS
}
func (i *InputState) copyAndReset(dst *InputState) {
dst.KeyPressed = i.KeyPressed
dst.MouseButtonPressed = i.MouseButtonPressed
dst.CursorX = i.CursorX
dst.CursorY = i.CursorY
dst.WheelX = i.WheelX
dst.WheelY = i.WheelY
dst.Touches = append(dst.Touches[:0], i.Touches...)
dst.Runes = append(dst.Runes[:0], i.Runes...)
dst.WindowBeingClosed = i.WindowBeingClosed
dst.DroppedFiles = i.DroppedFiles
// Reset the members that are updated by deltas, rather than absolute values.
i.WheelX = 0
i.WheelY = 0
i.Runes = i.Runes[:0]
// Reset the members that are never reset until they are explicitly done.
i.WindowBeingClosed = false
i.DroppedFiles = nil
}
func (i *InputState) appendRune(r rune) {
if !unicode.IsPrint(r) {
return
}
i.Runes = append(i.Runes, r)
}