GTK+ Forums

Hi,

I encountered a problem when using g_object_set ("background") together with text markup that sets fore- and background color of text inside a tree view cell. If I do this, if the highlighted text starts at the beginning of the cell or spans the whole cell, the foreground color is ignored.
I'll give you a code example and a screenshot to clarify this:
First I set the background color for the whole cell:



So far everything is alright, now I want to highlight some part of the cell, since this is part of a search functionality:



But if the highlighted text is identical to the whole text of the cell or it starts at the beginning of it, the foreground color setting is ignored. I have included a screenshot to show this effect.

Actually the whole real code behind creating the markup is done by a modified version of the example code listed at the glib docu page for g_regex_replace_eval, but the generated markup text should be correct, it is for example:



Am I missing here something regarding usage of <span>?

Thanks

Marcus

You can probably scrub the whole cell criterion as this is superfluous and covered by the beginning of cell case. I really don't know why there would be a conflict. Is this the case only when you do a g_object_set background?
It's generally much better to make style settings through an rc file (gtk2) or through css (gtk3).
Instead of the background property, you might want to try to use the cell-background property of the GtkCellRenderer parent.

btw shouldn't end in a NULL or was this just a typo?

Yes, the renderer settings are in fact larger, I just forgot to add the NULL for the excerpt.



I've tried that a few moments before your posting, but it doesn't change anything.



Good point, I've seen now that this effect is background-color-independent. I just didn't have a foreground setting for a cell without a background-color-setting since it was not necessary, but I've tried it now.

I'll use your suggestions for further investigations and post here if I solved the problem. Thanks for your answer!

Marcus

Well I did some kind of workaround for now.

First I check if the cell will have a background color (dependent on some conditions).
If this will be the case, I put <span foreground="'white'> and <span> around the text, so in the end it looks for example like this:
<span foreground='white'><span background='yellow' foreground='black'>no</span> content</span>

Now when it comes to cell rendering, g_object_set will only set a foreground color (to white) if it is a cell with a background color and there is no highlighted text for the cell. This avoids a possible conflict of a foreground color set by the cell renderer and by the <span foreground> markup.

I wanted to avoid external css files or so for setting just one one color markup that is only used for the search functionality.

If there is a better fix I am of course still interested in it.