Window not shown when SetFixedSize is used without Resize

[kheyse-werk]

Describe the bug:

Window not shown when SetFixedSize is used without Resize.
Adding a call to Resize shows the window.

Seems to be a regression since 2.0.x

Discussion on https://gophers.slack.com/archives/CB4QUBXGQ/p1644939596121299

Example code:

package main

import (
	"fyne.io/fyne/v2/app"
	"fyne.io/fyne/v2/container"
	"fyne.io/fyne/v2/widget"
)

func main() {
	a := app.New()
	w := a.NewWindow("Hello")

	hello := widget.NewLabel("Hello Fyne!")
	w.SetContent(container.NewVBox(
		hello,
		widget.NewButton("Hi!", func() {
			hello.SetText("Welcome :)")
		}),
	))
	w.SetFixedSize(true)

	w.ShowAndRun()
}

Device (please complete the following information):

• OS: Mac os
• Version: 12.2.1 on an M1
• Go version: 1.17.6
• Fyne version: 2.1.2

[andydotxyz]

Not showing may be macOS specific, but similarly there are errors on Linux, as shown:

> go run .                                                                                                                                                                                          ~/Code/Fyne/defyne git:main@8aaec13
X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  12 (X_ConfigureWindow)
  Value in failed request:  0x0
  Serial number of failed request:  274
  Current serial number in output stream:  284
exit status 1

Overall it seems we missed FixedSize with no Resize call in our window refactor tests...

[kheyse-werk]

I missed this in my original ticket, but on mac there is no error nor any log output. The ShowAndRun() function just "blocks" like it normally would, and returns when you quit the app. So no crash at all.

[andydotxyz]

Thanks, #2794 should fix it, if you could test that would be helpful as I only have a Linux computer to hand just now.

[kheyse-werk]

I'd like to test it, but could you help we with how i set up my application to use this specific branch of the fyne library?

[andydotxyz]

Usually a replace directive in your go.mod is easiest if you are testing with your own app.
I’ll try to dig out the exact format.

[andydotxyz]

It's now on the release/v2.1.x branch for testing, so you can just use version 0d0e999 to test it.

[kheyse-werk]

sorry i'm really not familiar with how to do this.
I tried go get github.com/fyne-io/fyne@0d0e999 but received invalid version: go.mod has post-v1 module path "fyne.io/fyne/v2" at revision 0d0e9995c778

[Jacalz]

I think go get fyne.io/fyne/v2@0d0e999 should do the job for you.

[kheyse-werk]

This gives:

go get: github.com/fyne-io/fyne/v2@v2.1.2-rc2.0.20220218010450-0d0e9995c778: parsing go.mod:
	module declares its path as: fyne.io/fyne/v2
	        but was required as: github.com/fyne-io/fyne/v2

[Jacalz]

Ah, I see. I was a bit too fast with the copy-paste. You should never use github.com for Fyne. Always fyne.io, hence use go get fyne.io/fyne/v2@0d0e999 instead.

[kheyse-werk]

That works thanks!
Indeed the window is visible now.
But I got a new problem with the window not adapting to the size of an Image i show in it

	header := canvas.NewImageFromResource(resourceHeaderSvg)
	header.FillMode = canvas.ImageFillOriginal

instead of

This problem only occurs with SetFixedSize(true)

Do you want me to report this as a new problem or not?

[andydotxyz]

Thanks for the report @kheyse-oqton, there is a complication with "ImageFillOriginal" that means Minimum size is not known fast enough. I think this probably requires a new issue as it is due to the MinSize increasing after first draw, so a more complicated solution will be required.

[kheyse-werk]

New ticket #2800