Window becomes unresponsive on resize

[AvaneraTV]

Describe the bug:

When updating the window contents, the application resizes the active window, but fails to display the new content and becomes unresponsive. This reproduces with a relatively small piece of code, but it's not unlikely that I'm simply doing something incorrectly. My application isn't particularly robust yet.

To Reproduce:

Steps to reproduce the behaviour:

1. Launch the sample code below.
2. Upon pressing the included button, the issueoccurs.

Screenshots:

Before:

After:

Example code:

package main

import (
	"strconv"

	"fyne.io/fyne/app"
	"fyne.io/fyne/layout"
	"fyne.io/fyne/widget"

	"fyne.io/fyne"
)

func main() {
	fyneApp := app.New()
	configWindow := fyneApp.NewWindow("Example - Problems")
	containerContents(&configWindow)
	configWindow.ShowAndRun()
}

var (
	hackyGlobalExample []int // Please don't judge me...
)

func containerContents(window *fyne.Window) {
	items := []fyne.CanvasObject{}

	for i := range hackyGlobalExample {
		items = append(items, widget.NewLabel(strconv.Itoa(i)))
	}

	addButton := widget.NewButton("Add", func() {
		hackyGlobalExample = append(hackyGlobalExample, len(hackyGlobalExample))
		containerContents(window)
	})
	items = append(items, addButton)

	configContainer := fyne.NewContainerWithLayout(layout.NewVBoxLayout(),
		fyne.NewContainerWithLayout(layout.NewGridLayout(1),
			items...,
		),
	)

	(*window).SetContent(configContainer)
}

Device (please complete the following information):

• OS: Windows 10
• Go version: 1.14.3
• Fyne version: 1.3.2

[andydotxyz]

You should not make pointers to, then dereference, the Window by the way. Your function would be better as:
func containerContents(window fyne.Window) {

[andydotxyz]

I'll look into this next time I am on a Windows computer, but in the meantime I would recommend not re-building your layout every time. Instead consider using Container.AddObject() instead.
Also I think the VBox container is not adding anything to your code (in this slimmed down version at least).

[AvaneraTV]

As some additional information, this reproduces on a separate Windows device, though it's another local device so unsurprisingly my environment is virtually identical. I'm trying to access a different device to see if I can continue to reproduce.

The same issue reproduces if I use AddObject as well, the modified sample I ran is below.

package main

import (
	"strconv"

	"fyne.io/fyne/app"
	"fyne.io/fyne/layout"
	"fyne.io/fyne/widget"

	"fyne.io/fyne"
)

func main() {
	fyneApp := app.New()
	configWindow := fyneApp.NewWindow("Example - Problems")
	containerContents(configWindow)
	configWindow.ShowAndRun()
}

var (
	hackyGlobalExample []int // Please don't judge me...
)

func containerContents(window fyne.Window) {
	items := []fyne.CanvasObject{}

	for i := range hackyGlobalExample {
		items = append(items, widget.NewLabel(strconv.Itoa(i)))
	}

	configContainer := fyne.NewContainerWithLayout(layout.NewGridLayout(1),
		items...,
	)

	addButton := widget.NewButton("Add", func() {
		hackyGlobalExample = append(hackyGlobalExample, len(hackyGlobalExample))
		configContainer.AddObject(widget.NewLabel(strconv.Itoa(len(hackyGlobalExample))))
	})
	configContainer.AddObject(addButton)

	window.SetContent(configContainer)
}

[andydotxyz]

OK, I can replicate this on Windows. Fix should be easier now :)

[andydotxyz]

This should now be fixed on develop, apologies for the trouble