Line breaks in Statusbar

Question

I have a program here that uses the GTK Status bar and I'd like to have multi-line output in it. When I try to output multiple lines into it, I get glyphs instead as seen below:

I'd expect it to work like in emacs:

After some searching, I discovered layoutSetSingleParagraphMode which seems to do exactly what I want. The default setting is False for most widgets and we're not setting it ourselves anywhere which makes me think that Statusbar defaults to single paragraph mode.

My problem is that I have no idea how to go from Statusbar to PangoLayout upon which I can use this function.

The closest I have come was finding widgetGetPangoContext which then let me get PangoLayout with layoutEmpty but as the name suggest, this seems to just create a separate PangoLayout which doesn't affect the statusbar when manipulated: pushing or popping of text behaves as it did before this.

Is there a function I'm missing? Admittedly, gtk2hs swims in a sea of type-classes to emulate OO which doesn't contribute to the readability of the generated docs. It seems that it should be a simple task.

If we're never meant to get out a PangoLayout from existing widget then how can I achieve what I want? There seems to be no option to choose the paragraph mode at Statusbar creation time.

See this for a GitHub issue for this project relating to this.

Answer 1

Please try this:

Use statusbarGetMessageArea to get the Gtk.Box where the status bar's text label is.

Then get the text label with containerGetChildren <status bar message area>. This function returns a list of Gtk.Widget with just one element, the label.

Cast the widget to a label with castToLabel.

Now you can set multi line mode with labelSetSingleLineMode <label> False.

Set the label's contents with labelSetText or labelSetMarkup.

I have tried it with success (gtk 0.12.5 from Hackage, using GTK2, haven't tried it with GTK3).