Dialog not resizing in newly created window

[Kriechi]

Describe the bug:

I'm trying to create a new window and show a FolderOpen dialog that pretty much takes the full window.
However, it is not resizing as expected and instead stays at a small (default?) size.

Example code

w := fyne.CurrentApp().NewWindow("Select destination...")
w.Resize(fyne.NewSize(1000, 600))
w.Show()
dialog := dialog.NewFolderOpen(func(list fyne.ListableURI, err error) {
	fmt.Println(list, err)
	w.Close()
}, w)
dialog.Show()
dialog.Resize(fyne.NewSize(975, 575))

Screenshot of the too small dialog

Workaround

@andydotxyz pointed out that a sleep might be needed before showing the dialog.
Modifying the code snippet like this, results in the expected full-window dialog:

...
dialog.Show()
time.Sleep(100 * time.Millisecond) // YMMV, 100ms worked for me
dialog.Resize(fyne.NewSize(975, 575))

Device (please complete the following information):

• OS: [e.g. Linux, MacOS or iOS] macOS
• Version: [e.g. 22] 10.15.7
• Go version: [e.g. 1.12.3] 1.15
• Fyne version: [e.g. 1.2.0 or git SHA] 1.4.2

[Jacalz]

Just for reference, I think this might be related to #1382.

[andydotxyz]

It could be, though I think the root cause is different.
The solution may fix both though ;).

[anderspitman]

I'm getting bit by this as well. The default folder select dialog is too small. Adding the sleep works for me as well, but is obviously very hacky.

[andydotxyz]

Fixed on develop and release/v2.0.x