MsgBox "freeze" my Finder

Targets macOS
1

In a Canvas, I have DropObject; the code there calls a method who resize the dropped image.

For debug purposes (what a bad idea), I issue a MsgBox with the image width and height.

Used code:

MsgBox "This is a Message Box…"

That application have three other windows with Canvas, who accept images drop. Lately, I started to drop images (the same) onto all these four windows and noticed the MsgBox “freeze” my Finder.

Nota:
a. The Finder "record the actions and execute them after a click in the OK button,
b. I put the code in the DropObject Event and get the same results.

Also, a Return keypress is lost (does not press the OK button), the MsgBox is frontmost.

El Capitan / Xojo 2015r1 (both running in the IDE and as stand alone application).

2

Finder and the file are both locked during the DropObject event.

The only thing you should be doing in this event is creating a FolderItem reference to the dropped file. Processing the file should be threaded or delayed until the next event loop with a Timer.

Since Finder and the file are locked and MsgBox is modal, this behavior comes as no surprise.

3

Thanks Tim for the explanation.

4

For debugging purposes, you could also draw your text onto the canvas.

5

You are correct, Greg.

Worst, I have a Label (or TextField, I forgot) to make user reports I can use for debugging; or SystemLog…

Past weird habits are hard to left