standardize default double tap delay constants

internal/driver/glfw/driver_desktop.go

@@ -10,6 +10,7 @@ import (
 	"runtime"
 	"sync"
 	"syscall"
+	"time"
 
 	"fyne.io/fyne/v2/canvas"
 	"fyne.io/fyne/v2/internal/painter"
@@ -21,6 +22,8 @@ import (
 	"fyne.io/fyne/v2/theme"
 )
 
+const desktopDefaultDoubleTapDelay = 300 * time.Millisecond
+
 var (
 	systrayIcon fyne.Resource
 	setup       sync.Once

internal/driver/glfw/driver_web.go

@@ -8,6 +8,8 @@ import (
 	"fyne.io/fyne/v2"
 )
 
+const webDefaultDoubleTapDelay = 300 * time.Millisecond
+
 func (d *gLDriver) SetSystemTrayMenu(m *fyne.Menu) {
 	// no-op for mobile apps using this driver
 }
@@ -20,5 +22,5 @@ func setDisableScreenBlank(disable bool) {
 }
 
 func (g *gLDriver) DoubleTapDelay() time.Duration {
-	return 300 * time.Millisecond
+	return webDefaultDoubleTapDelay
 }

internal/driver/glfw/driver_windows.go

@@ -72,12 +72,10 @@ func setDisableScreenBlank(disable bool) {
 	syscall.Syscall(executionState.Addr(), 1, uintptr(uType), 0, 0)
 }
 
-const defaultDoubleTapDelay = 300 * time.Millisecond
-
 func (g *gLDriver) DoubleTapDelay() time.Duration {
 	// https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getdoubleclicktime
 	if getDoubleClickTime == nil {
-		return defaultDoubleTapDelay
+		return desktopDefaultDoubleTapDelay
 	}
 	r1, _, _ := syscall.Syscall(getDoubleClickTime.Addr(), 0, 0, 0, 0)
 	return time.Duration(uint64(r1) * uint64(time.Millisecond))

internal/driver/glfw/driver_xdg.go

@@ -46,5 +46,5 @@ func setDisableScreenBlank(disable bool) {
 }
 
 func (g *gLDriver) DoubleTapDelay() time.Duration {
-	return 300 * time.Millisecond
+	return desktopDefaultDoubleTapDelay
 }