Android/iOS: Touch/mouse coordinates are wrong

[pjanx]

Checklist

• I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
• This issue only relates to a single bug. I will open new issues for any other problems.

Describe the bug

In Fyne apps on mobile, you need to tap or click lower than you should.

Happens on real Android, emulated Android, and also in iOS simulator.

How to reproduce

• Run the example on a mobile platform
• Tap or click around the Entry
• You see that it is deselected when you hit its upper part, and selected when you hit the area underneath

Screenshots

No response

Example code

package main

import (
	"net"

	"fyne.io/fyne/v2"
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/dialog"
	"fyne.io/fyne/v2/driver/mobile"
	"fyne.io/fyne/v2/widget"
)

func main() {
	a := app.New()
	w := a.NewWindow("Bugs")
	w.Resize(fyne.NewSize(640, 480))
	w.SetContent(widget.NewMultiLineEntry())

	connectAddress := widget.NewEntry()
	connectAddress.SetPlaceHolder("host:port")
	connectAddress.Validator = func(text string) error {
		_, _, err := net.SplitHostPort(text)
		return err
	}
	connectAddress.SetText(string([]byte{3, 2, 1, 65, 66, 67, ':', '1'}))
	connectAddress.TypedKey(&fyne.KeyEvent{Name: fyne.KeyPageDown})

	var wConnect *dialog.FormDialog
	wConnect = dialog.NewForm("Connect to relay", "Connect", "Exit",
		[]*widget.FormItem{
			{Text: "Address:", Widget: connectAddress},
		}, func(ok bool) {
			if ok {
			} else if _, ok := a.Driver().(mobile.Driver); ok {
				wConnect.Show()
			} else {
				a.Quit()
			}
		}, w)
	wConnect.Show()
	w.ShowAndRun()
}

Fyne version

2.5.2

Go compiler version

1.23.2

Operating system and version

Android

Additional Information

No response

[pjanx]

I didn't know this was intentional: a44331a

Any offset is wrong! Styluses exist. At most if you can decouple the mouse or stylus from touch events.

[andydotxyz]

I agree with your summary. If the input device is a stylus we should not offset it. Feel free to adapt this issue or open a new one for that purpose.