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input.go
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input.go
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package pixelgl
import (
"github.com/faiface/mainthread"
"github.com/faiface/pixel"
"github.com/go-gl/glfw/v3.3/glfw"
)
// Pressed returns whether the Button is currently pressed down.
func (w *Window) Pressed(button Button) bool {
return w.currInp.buttons[button]
}
// JustPressed returns whether the Button has just been pressed down.
func (w *Window) JustPressed(button Button) bool {
return w.currInp.buttons[button] && !w.prevInp.buttons[button]
}
// JustReleased returns whether the Button has just been released up.
func (w *Window) JustReleased(button Button) bool {
return !w.currInp.buttons[button] && w.prevInp.buttons[button]
}
// Repeated returns whether a repeat event has been triggered on button.
//
// Repeat event occurs repeatedly when a button is held down for some time.
func (w *Window) Repeated(button Button) bool {
return w.currInp.repeat[button]
}
// MousePosition returns the current mouse position in the Window's Bounds.
func (w *Window) MousePosition() pixel.Vec {
return w.currInp.mouse
}
// MousePreviousPosition returns the previous mouse position in the Window's Bounds.
func (w *Window) MousePreviousPosition() pixel.Vec {
return w.prevInp.mouse
}
// SetMousePosition positions the mouse cursor anywhere within the Window's Bounds.
func (w *Window) SetMousePosition(v pixel.Vec) {
mainthread.Call(func() {
if (v.X >= 0 && v.X <= w.bounds.W()) &&
(v.Y >= 0 && v.Y <= w.bounds.H()) {
w.window.SetCursorPos(
v.X+w.bounds.Min.X,
(w.bounds.H()-v.Y)+w.bounds.Min.Y,
)
w.prevInp.mouse = v
w.currInp.mouse = v
w.tempInp.mouse = v
}
})
}
// MouseInsideWindow returns true if the mouse position is within the Window's Bounds.
func (w *Window) MouseInsideWindow() bool {
return w.cursorInsideWindow
}
// MouseScroll returns the mouse scroll amount (in both axes) since the last call to Window.Update.
func (w *Window) MouseScroll() pixel.Vec {
return w.currInp.scroll
}
// Typed returns the text typed on the keyboard since the last call to Window.Update.
func (w *Window) Typed() string {
return w.currInp.typed
}
// Button is a keyboard or mouse button. Why distinguish?
type Button int
// List of all mouse buttons.
const (
MouseButton1 = Button(glfw.MouseButton1)
MouseButton2 = Button(glfw.MouseButton2)
MouseButton3 = Button(glfw.MouseButton3)
MouseButton4 = Button(glfw.MouseButton4)
MouseButton5 = Button(glfw.MouseButton5)
MouseButton6 = Button(glfw.MouseButton6)
MouseButton7 = Button(glfw.MouseButton7)
MouseButton8 = Button(glfw.MouseButton8)
MouseButtonLast = Button(glfw.MouseButtonLast)
MouseButtonLeft = Button(glfw.MouseButtonLeft)
MouseButtonRight = Button(glfw.MouseButtonRight)
MouseButtonMiddle = Button(glfw.MouseButtonMiddle)
)
// List of all keyboard buttons.
const (
KeyUnknown = Button(glfw.KeyUnknown)
KeySpace = Button(glfw.KeySpace)
KeyApostrophe = Button(glfw.KeyApostrophe)
KeyComma = Button(glfw.KeyComma)
KeyMinus = Button(glfw.KeyMinus)
KeyPeriod = Button(glfw.KeyPeriod)
KeySlash = Button(glfw.KeySlash)
Key0 = Button(glfw.Key0)
Key1 = Button(glfw.Key1)
Key2 = Button(glfw.Key2)
Key3 = Button(glfw.Key3)
Key4 = Button(glfw.Key4)
Key5 = Button(glfw.Key5)
Key6 = Button(glfw.Key6)
Key7 = Button(glfw.Key7)
Key8 = Button(glfw.Key8)
Key9 = Button(glfw.Key9)
KeySemicolon = Button(glfw.KeySemicolon)
KeyEqual = Button(glfw.KeyEqual)
KeyA = Button(glfw.KeyA)
KeyB = Button(glfw.KeyB)
KeyC = Button(glfw.KeyC)
KeyD = Button(glfw.KeyD)
KeyE = Button(glfw.KeyE)
KeyF = Button(glfw.KeyF)
KeyG = Button(glfw.KeyG)
KeyH = Button(glfw.KeyH)
KeyI = Button(glfw.KeyI)
KeyJ = Button(glfw.KeyJ)
KeyK = Button(glfw.KeyK)
KeyL = Button(glfw.KeyL)
KeyM = Button(glfw.KeyM)
KeyN = Button(glfw.KeyN)
KeyO = Button(glfw.KeyO)
KeyP = Button(glfw.KeyP)
KeyQ = Button(glfw.KeyQ)
KeyR = Button(glfw.KeyR)
KeyS = Button(glfw.KeyS)
KeyT = Button(glfw.KeyT)
KeyU = Button(glfw.KeyU)
KeyV = Button(glfw.KeyV)
KeyW = Button(glfw.KeyW)
KeyX = Button(glfw.KeyX)
KeyY = Button(glfw.KeyY)
KeyZ = Button(glfw.KeyZ)
KeyLeftBracket = Button(glfw.KeyLeftBracket)
KeyBackslash = Button(glfw.KeyBackslash)
KeyRightBracket = Button(glfw.KeyRightBracket)
KeyGraveAccent = Button(glfw.KeyGraveAccent)
KeyWorld1 = Button(glfw.KeyWorld1)
KeyWorld2 = Button(glfw.KeyWorld2)
KeyEscape = Button(glfw.KeyEscape)
KeyEnter = Button(glfw.KeyEnter)
KeyTab = Button(glfw.KeyTab)
KeyBackspace = Button(glfw.KeyBackspace)
KeyInsert = Button(glfw.KeyInsert)
KeyDelete = Button(glfw.KeyDelete)
KeyRight = Button(glfw.KeyRight)
KeyLeft = Button(glfw.KeyLeft)
KeyDown = Button(glfw.KeyDown)
KeyUp = Button(glfw.KeyUp)
KeyPageUp = Button(glfw.KeyPageUp)
KeyPageDown = Button(glfw.KeyPageDown)
KeyHome = Button(glfw.KeyHome)
KeyEnd = Button(glfw.KeyEnd)
KeyCapsLock = Button(glfw.KeyCapsLock)
KeyScrollLock = Button(glfw.KeyScrollLock)
KeyNumLock = Button(glfw.KeyNumLock)
KeyPrintScreen = Button(glfw.KeyPrintScreen)
KeyPause = Button(glfw.KeyPause)
KeyF1 = Button(glfw.KeyF1)
KeyF2 = Button(glfw.KeyF2)
KeyF3 = Button(glfw.KeyF3)
KeyF4 = Button(glfw.KeyF4)
KeyF5 = Button(glfw.KeyF5)
KeyF6 = Button(glfw.KeyF6)
KeyF7 = Button(glfw.KeyF7)
KeyF8 = Button(glfw.KeyF8)
KeyF9 = Button(glfw.KeyF9)
KeyF10 = Button(glfw.KeyF10)
KeyF11 = Button(glfw.KeyF11)
KeyF12 = Button(glfw.KeyF12)
KeyF13 = Button(glfw.KeyF13)
KeyF14 = Button(glfw.KeyF14)
KeyF15 = Button(glfw.KeyF15)
KeyF16 = Button(glfw.KeyF16)
KeyF17 = Button(glfw.KeyF17)
KeyF18 = Button(glfw.KeyF18)
KeyF19 = Button(glfw.KeyF19)
KeyF20 = Button(glfw.KeyF20)
KeyF21 = Button(glfw.KeyF21)
KeyF22 = Button(glfw.KeyF22)
KeyF23 = Button(glfw.KeyF23)
KeyF24 = Button(glfw.KeyF24)
KeyF25 = Button(glfw.KeyF25)
KeyKP0 = Button(glfw.KeyKP0)
KeyKP1 = Button(glfw.KeyKP1)
KeyKP2 = Button(glfw.KeyKP2)
KeyKP3 = Button(glfw.KeyKP3)
KeyKP4 = Button(glfw.KeyKP4)
KeyKP5 = Button(glfw.KeyKP5)
KeyKP6 = Button(glfw.KeyKP6)
KeyKP7 = Button(glfw.KeyKP7)
KeyKP8 = Button(glfw.KeyKP8)
KeyKP9 = Button(glfw.KeyKP9)
KeyKPDecimal = Button(glfw.KeyKPDecimal)
KeyKPDivide = Button(glfw.KeyKPDivide)
KeyKPMultiply = Button(glfw.KeyKPMultiply)
KeyKPSubtract = Button(glfw.KeyKPSubtract)
KeyKPAdd = Button(glfw.KeyKPAdd)
KeyKPEnter = Button(glfw.KeyKPEnter)
KeyKPEqual = Button(glfw.KeyKPEqual)
KeyLeftShift = Button(glfw.KeyLeftShift)
KeyLeftControl = Button(glfw.KeyLeftControl)
KeyLeftAlt = Button(glfw.KeyLeftAlt)
KeyLeftSuper = Button(glfw.KeyLeftSuper)
KeyRightShift = Button(glfw.KeyRightShift)
KeyRightControl = Button(glfw.KeyRightControl)
KeyRightAlt = Button(glfw.KeyRightAlt)
KeyRightSuper = Button(glfw.KeyRightSuper)
KeyMenu = Button(glfw.KeyMenu)
KeyLast = Button(glfw.KeyLast)
)
// String returns a human-readable string describing the Button.
func (b Button) String() string {
name, ok := buttonNames[b]
if !ok {
return "Invalid"
}
return name
}
var buttonNames = map[Button]string{
MouseButton4: "MouseButton4",
MouseButton5: "MouseButton5",
MouseButton6: "MouseButton6",
MouseButton7: "MouseButton7",
MouseButton8: "MouseButton8",
MouseButtonLeft: "MouseButtonLeft",
MouseButtonRight: "MouseButtonRight",
MouseButtonMiddle: "MouseButtonMiddle",
KeyUnknown: "Unknown",
KeySpace: "Space",
KeyApostrophe: "Apostrophe",
KeyComma: "Comma",
KeyMinus: "Minus",
KeyPeriod: "Period",
KeySlash: "Slash",
Key0: "0",
Key1: "1",
Key2: "2",
Key3: "3",
Key4: "4",
Key5: "5",
Key6: "6",
Key7: "7",
Key8: "8",
Key9: "9",
KeySemicolon: "Semicolon",
KeyEqual: "Equal",
KeyA: "A",
KeyB: "B",
KeyC: "C",
KeyD: "D",
KeyE: "E",
KeyF: "F",
KeyG: "G",
KeyH: "H",
KeyI: "I",
KeyJ: "J",
KeyK: "K",
KeyL: "L",
KeyM: "M",
KeyN: "N",
KeyO: "O",
KeyP: "P",
KeyQ: "Q",
KeyR: "R",
KeyS: "S",
KeyT: "T",
KeyU: "U",
KeyV: "V",
KeyW: "W",
KeyX: "X",
KeyY: "Y",
KeyZ: "Z",
KeyLeftBracket: "LeftBracket",
KeyBackslash: "Backslash",
KeyRightBracket: "RightBracket",
KeyGraveAccent: "GraveAccent",
KeyWorld1: "World1",
KeyWorld2: "World2",
KeyEscape: "Escape",
KeyEnter: "Enter",
KeyTab: "Tab",
KeyBackspace: "Backspace",
KeyInsert: "Insert",
KeyDelete: "Delete",
KeyRight: "Right",
KeyLeft: "Left",
KeyDown: "Down",
KeyUp: "Up",
KeyPageUp: "PageUp",
KeyPageDown: "PageDown",
KeyHome: "Home",
KeyEnd: "End",
KeyCapsLock: "CapsLock",
KeyScrollLock: "ScrollLock",
KeyNumLock: "NumLock",
KeyPrintScreen: "PrintScreen",
KeyPause: "Pause",
KeyF1: "F1",
KeyF2: "F2",
KeyF3: "F3",
KeyF4: "F4",
KeyF5: "F5",
KeyF6: "F6",
KeyF7: "F7",
KeyF8: "F8",
KeyF9: "F9",
KeyF10: "F10",
KeyF11: "F11",
KeyF12: "F12",
KeyF13: "F13",
KeyF14: "F14",
KeyF15: "F15",
KeyF16: "F16",
KeyF17: "F17",
KeyF18: "F18",
KeyF19: "F19",
KeyF20: "F20",
KeyF21: "F21",
KeyF22: "F22",
KeyF23: "F23",
KeyF24: "F24",
KeyF25: "F25",
KeyKP0: "KP0",
KeyKP1: "KP1",
KeyKP2: "KP2",
KeyKP3: "KP3",
KeyKP4: "KP4",
KeyKP5: "KP5",
KeyKP6: "KP6",
KeyKP7: "KP7",
KeyKP8: "KP8",
KeyKP9: "KP9",
KeyKPDecimal: "KPDecimal",
KeyKPDivide: "KPDivide",
KeyKPMultiply: "KPMultiply",
KeyKPSubtract: "KPSubtract",
KeyKPAdd: "KPAdd",
KeyKPEnter: "KPEnter",
KeyKPEqual: "KPEqual",
KeyLeftShift: "LeftShift",
KeyLeftControl: "LeftControl",
KeyLeftAlt: "LeftAlt",
KeyLeftSuper: "LeftSuper",
KeyRightShift: "RightShift",
KeyRightControl: "RightControl",
KeyRightAlt: "RightAlt",
KeyRightSuper: "RightSuper",
KeyMenu: "Menu",
}
func (w *Window) initInput() {
mainthread.Call(func() {
w.window.SetMouseButtonCallback(func(_ *glfw.Window, button glfw.MouseButton, action glfw.Action, mod glfw.ModifierKey) {
switch action {
case glfw.Press:
w.tempInp.buttons[Button(button)] = true
case glfw.Release:
w.tempInp.buttons[Button(button)] = false
}
})
w.window.SetKeyCallback(func(_ *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
if key == glfw.KeyUnknown {
return
}
switch action {
case glfw.Press:
w.tempInp.buttons[Button(key)] = true
case glfw.Release:
w.tempInp.buttons[Button(key)] = false
case glfw.Repeat:
w.tempInp.repeat[Button(key)] = true
}
})
w.window.SetCursorEnterCallback(func(_ *glfw.Window, entered bool) {
w.cursorInsideWindow = entered
})
w.window.SetCursorPosCallback(func(_ *glfw.Window, x, y float64) {
w.tempInp.mouse = pixel.V(
x+w.bounds.Min.X,
(w.bounds.H()-y)+w.bounds.Min.Y,
)
})
w.window.SetScrollCallback(func(_ *glfw.Window, xoff, yoff float64) {
w.tempInp.scroll.X += xoff
w.tempInp.scroll.Y += yoff
})
w.window.SetCharCallback(func(_ *glfw.Window, r rune) {
w.tempInp.typed += string(r)
})
})
}
// UpdateInput polls window events. Call this function to poll window events
// without swapping buffers. Note that the Update method invokes UpdateInput.
func (w *Window) UpdateInput() {
mainthread.Call(func() {
glfw.PollEvents()
})
w.prevInp = w.currInp
w.currInp = w.tempInp
w.tempInp.repeat = [KeyLast + 1]bool{}
w.tempInp.scroll = pixel.ZV
w.tempInp.typed = ""
w.updateJoystickInput()
}