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Correctly handle imgui mouse/keyboard capture

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This commit is contained in:
bloeys
2024-04-11 22:07:38 +04:00
parent 80ce6d60d2
commit 20ed804d2a
2 changed files with 71 additions and 42 deletions
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47
engine/engine.go
View File

@ -15,6 +15,10 @@ import (
var (
isInited = false
isSdlButtonLeftDown = false
isSdlButtonMiddleDown = false
isSdlButtonRightDown = false
)
type Window struct {
@ -29,7 +33,9 @@ func (w *Window) handleInputs() {
input.EventLoopStart()
imIo := imgui.CurrentIO()
// @TODO: Would be nice to have imgui package process its own events via a callback instead of it being part of engine code
imguiCaptureMouse := imIo.WantCaptureMouse()
imguiCaptureKeyboard := imIo.WantCaptureKeyboard()
for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
//Fire callbacks
@ -42,14 +48,18 @@ func (w *Window) handleInputs() {
case *sdl.MouseWheelEvent:
input.HandleMouseWheelEvent(e)
if !imguiCaptureMouse {
input.HandleMouseWheelEvent(e)
}
xDelta, yDelta := input.GetMouseWheelMotion()
imIo.AddMouseWheelDelta(float32(xDelta), float32(yDelta))
imIo.AddMouseWheelDelta(float32(e.X), float32(e.Y))
case *sdl.KeyboardEvent:
input.HandleKeyboardEvent(e)
if !imguiCaptureKeyboard {
input.HandleKeyboardEvent(e)
}
imIo.AddKeyEvent(nmageimgui.SdlScancodeToImGuiKey(e.Keysym.Scancode), e.Type == sdl.KEYDOWN)
// Send modifier key updates to imgui
@ -73,12 +83,29 @@ func (w *Window) handleInputs() {
imIo.AddInputCharactersUTF8(e.GetText())
case *sdl.MouseButtonEvent:
input.HandleMouseBtnEvent(e)
if !imguiCaptureMouse {
input.HandleMouseBtnEvent(e)
}
isPressed := e.State == sdl.PRESSED
if e.Button == sdl.BUTTON_LEFT {
isSdlButtonLeftDown = isPressed
} else if e.Button == sdl.BUTTON_MIDDLE {
isSdlButtonMiddleDown = isPressed
} else if e.Button == sdl.BUTTON_RIGHT {
isSdlButtonRightDown = isPressed
}
case *sdl.MouseMotionEvent:
input.HandleMouseMotionEvent(e)
if !imguiCaptureMouse {
input.HandleMouseMotionEvent(e)
}
case *sdl.WindowEvent:
if e.Event == sdl.WINDOWEVENT_SIZE_CHANGED {
w.handleWindowResize()
}
@ -92,9 +119,9 @@ func (w *Window) handleInputs() {
x, y, _ := sdl.GetMouseState()
imIo.SetMousePos(imgui.Vec2{X: float32(x), Y: float32(y)})
imIo.SetMouseButtonDown(0, input.MouseDown(sdl.BUTTON_LEFT))
imIo.SetMouseButtonDown(1, input.MouseDown(sdl.BUTTON_RIGHT))
imIo.SetMouseButtonDown(2, input.MouseDown(sdl.BUTTON_MIDDLE))
imIo.SetMouseButtonDown(0, isSdlButtonLeftDown)
imIo.SetMouseButtonDown(1, isSdlButtonRightDown)
imIo.SetMouseButtonDown(2, isSdlButtonMiddleDown)
}
func (w *Window) handleWindowResize() {

66
input/input.go
View File

@ -31,8 +31,8 @@ type mouseWheelState struct {
}
var (
keyMap = make(map[sdl.Keycode]*keyState)
mouseBtnMap = make(map[int]*mouseBtnState)
keyMap = make(map[sdl.Keycode]keyState)
mouseBtnMap = make(map[int]mouseBtnState)
mouseMotion = mouseMotionState{}
mouseWheel = mouseWheelState{}
quitRequested bool
@ -70,29 +70,31 @@ func IsQuitClicked() bool {
func HandleKeyboardEvent(e *sdl.KeyboardEvent) {
ks := keyMap[e.Keysym.Sym]
if ks == nil {
ks = &keyState{Key: e.Keysym.Sym}
keyMap[ks.Key] = ks
ks, ok := keyMap[e.Keysym.Sym]
if !ok {
ks = keyState{Key: e.Keysym.Sym}
}
ks.State = int(e.State)
ks.IsPressedThisFrame = e.State == sdl.PRESSED && e.Repeat == 0
ks.IsReleasedThisFrame = e.State == sdl.RELEASED && e.Repeat == 0
keyMap[ks.Key] = ks
}
func HandleMouseBtnEvent(e *sdl.MouseButtonEvent) {
mb := mouseBtnMap[int(e.Button)]
if mb == nil {
mb = &mouseBtnState{Btn: int(e.Button)}
mouseBtnMap[int(e.Button)] = mb
mb, ok := mouseBtnMap[int(e.Button)]
if !ok {
mb = mouseBtnState{Btn: int(e.Button)}
}
mb.State = int(e.State)
mb.IsDoubleClicked = e.Clicks == 2 && e.State == sdl.PRESSED
mb.IsPressedThisFrame = e.State == sdl.PRESSED
mb.IsReleasedThisFrame = e.State == sdl.RELEASED
mouseBtnMap[int(e.Button)] = mb
}
func HandleMouseMotionEvent(e *sdl.MouseMotionEvent) {
@ -109,12 +111,12 @@ func HandleMouseWheelEvent(e *sdl.MouseWheelEvent) {
mouseWheel.YDelta = e.Y
}
//GetMousePos returns the window coordinates of the mouse
// GetMousePos returns the window coordinates of the mouse
func GetMousePos() (x, y int32) {
return mouseMotion.XPos, mouseMotion.YPos
}
//GetMouseMotion returns how many pixels were moved last frame
// GetMouseMotion returns how many pixels were moved last frame
func GetMouseMotion() (xDelta, yDelta int32) {
return mouseMotion.XDelta, mouseMotion.YDelta
}
@ -141,7 +143,7 @@ func GetMouseWheelMotion() (xDelta, yDelta int32) {
return mouseWheel.XDelta, mouseWheel.YDelta
}
//GetMouseWheelXNorm returns 1 if mouse wheel xDelta > 0, -1 if xDelta < 0, and 0 otherwise
// GetMouseWheelXNorm returns 1 if mouse wheel xDelta > 0, -1 if xDelta < 0, and 0 otherwise
func GetMouseWheelXNorm() int32 {
if mouseWheel.XDelta > 0 {
@ -153,7 +155,7 @@ func GetMouseWheelXNorm() int32 {
return 0
}
//returns 1 if mouse wheel yDelta > 0, -1 if yDelta < 0, and 0 otherwise
// returns 1 if mouse wheel yDelta > 0, -1 if yDelta < 0, and 0 otherwise
func GetMouseWheelYNorm() int32 {
if mouseWheel.YDelta > 0 {
@ -167,8 +169,8 @@ func GetMouseWheelYNorm() int32 {
func KeyClicked(kc sdl.Keycode) bool {
ks := keyMap[kc]
if ks == nil {
ks, ok := keyMap[kc]
if !ok {
return false
}
@ -177,8 +179,8 @@ func KeyClicked(kc sdl.Keycode) bool {
func KeyReleased(kc sdl.Keycode) bool {
ks := keyMap[kc]
if ks == nil {
ks, ok := keyMap[kc]
if !ok {
return false
}
@ -187,8 +189,8 @@ func KeyReleased(kc sdl.Keycode) bool {
func KeyDown(kc sdl.Keycode) bool {
ks := keyMap[kc]
if ks == nil {
ks, ok := keyMap[kc]
if !ok {
return false
}
@ -197,8 +199,8 @@ func KeyDown(kc sdl.Keycode) bool {
func KeyUp(kc sdl.Keycode) bool {
ks := keyMap[kc]
if ks == nil {
ks, ok := keyMap[kc]
if !ok {
return true
}
@ -207,8 +209,8 @@ func KeyUp(kc sdl.Keycode) bool {
func MouseClicked(mb int) bool {
btn := mouseBtnMap[mb]
if btn == nil {
btn, ok := mouseBtnMap[mb]
if !ok {
return false
}
@ -217,8 +219,8 @@ func MouseClicked(mb int) bool {
func MouseDoubleClicked(mb int) bool {
btn := mouseBtnMap[mb]
if btn == nil {
btn, ok := mouseBtnMap[mb]
if !ok {
return false
}
@ -226,8 +228,8 @@ func MouseDoubleClicked(mb int) bool {
}
func MouseReleased(mb int) bool {
btn := mouseBtnMap[mb]
if btn == nil {
btn, ok := mouseBtnMap[mb]
if !ok {
return false
}
@ -236,8 +238,8 @@ func MouseReleased(mb int) bool {
func MouseDown(mb int) bool {
btn := mouseBtnMap[mb]
if btn == nil {
btn, ok := mouseBtnMap[mb]
if !ok {
return false
}
@ -246,8 +248,8 @@ func MouseDown(mb int) bool {
func MouseUp(mb int) bool {
btn := mouseBtnMap[mb]
if btn == nil {
btn, ok := mouseBtnMap[mb]
if !ok {
return true
}