exp/textinput: use native pixels for a candidate window position

exp/textinput/textinput.go

@@ -47,7 +47,7 @@ type State struct {
 //
 // Start returns nil and nil if the current environment doesn't support this package.
 func Start(x, y int) (states chan State, close func()) {
-	cx, cy := ui.Get().LogicalPositionToClientPosition(float64(x), float64(y))
+	cx, cy := ui.Get().LogicalPositionToClientPositionInNativePixels(float64(x), float64(y))
 	return theTextInput.Start(int(cx), int(cy))
 }
 

internal/ui/context.go

@@ -285,6 +285,10 @@ func (c *context) screenScaleAndOffsets() (scale, offsetX, offsetY float64) {
 	return
 }
 
-func (u *UserInterface) LogicalPositionToClientPosition(x, y float64) (float64, float64) {
-	return u.context.logicalPositionToClientPosition(x, y, u.Monitor().DeviceScaleFactor())
+func (u *UserInterface) LogicalPositionToClientPositionInNativePixels(x, y float64) (float64, float64) {
+	s := u.Monitor().DeviceScaleFactor()
+	x, y = u.context.logicalPositionToClientPosition(x, y, s)
+	x = dipToNativePixels(x, s)
+	y = dipToNativePixels(y, s)
+	return x, y
 }

internal/ui/ui_android.go

@@ -129,3 +129,7 @@ func deviceScaleFactorImpl() float64 {
 	}
 	return s
 }
+
+func dipToNativePixels(x float64, scale float64) float64 {
+	return x * scale
+}

internal/ui/ui_glfw.go

@@ -2131,3 +2131,7 @@ func IsScreenTransparentAvailable() bool {
 func (u *UserInterface) RunOnMainThread(f func()) {
 	u.mainThread.Call(f)
 }
+
+func dipToNativePixels(x float64, scale float64) float64 {
+	return dipToGLFWPixel(x, scale)
+}

internal/ui/ui_ios.go

@@ -92,3 +92,7 @@ func deviceScaleFactorImpl() float64 {
 	// TODO: Can this be called from non-main threads?
 	return float64(C.devicePixelRatio())
 }
+
+func dipToNativePixels(x float64, scale float64) float64 {
+	return x
+}

internal/ui/ui_js.go

@@ -811,3 +811,7 @@ func (u *UserInterface) updateIconIfNeeded() error {
 func IsScreenTransparentAvailable() bool {
 	return true
 }
+
+func dipToNativePixels(x float64, scale float64) float64 {
+	return x
+}

internal/ui/ui_nintendosdk.go

@@ -181,3 +181,7 @@ func (u *UserInterface) Monitor() *Monitor {
 func IsScreenTransparentAvailable() bool {
 	return false
 }
+
+func dipToNativePixels(x float64, scale float64) float64 {
+	return x
+}

internal/ui/ui_playstation5.go

@@ -174,3 +174,7 @@ func (u *UserInterface) Monitor() *Monitor {
 func IsScreenTransparentAvailable() bool {
 	return false
 }
+
+func dipToNativePixels(x float64, scale float64) float64 {
+	return x
+}