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Add conditioned-out diagnostics in columns_compute_width.

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These are a slightly cleaned-up version of the diagnostics I was using
to debug the layout problems in the GTK3 config box the other day. In
particular, if the box comes out far too wide - as I've just found out
that it also does when I compile the current state of the code against
OS X GTK3 - these diagnostics should provide enough information to
figure out which control is the limiting factor.

To enable: make CPPFLAGS="-DCOLUMNS_WIDTH_DIAGNOSTICS"
This commit is contained in:
Simon Tatham 2015-08-27 18:32:41 +01:00
parent 54dcfb033c
commit 76612e772d
1 changed files with 29 additions and 0 deletions
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29
unix/gtkcols.c
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@ -588,6 +588,10 @@ static gint columns_compute_width(Columns *cols, widget_dim_fn_t get_width)
const gint *percentages;
static const gint onecol[] = { 100 };
#ifdef COLUMNS_WIDTH_DIAGNOSTICS
printf("compute_width(%p): start\n", cols);
#endif
retwidth = 0;
ncols = 1;
@ -611,6 +615,23 @@ static gint columns_compute_width(Columns *cols, widget_dim_fn_t get_width)
childwidth = get_width(child);
colspan = child->colspan ? child->colspan : ncols-child->colstart;
#ifdef COLUMNS_WIDTH_DIAGNOSTICS
printf("compute_width(%p): ", cols);
if (GTK_IS_LABEL(child->widget))
printf("label %p '%s' wrap=%s: ", child->widget,
gtk_label_get_text(GTK_LABEL(child->widget)),
(gtk_label_get_line_wrap(GTK_LABEL(child->widget))
? "TRUE" : "FALSE"));
else
printf("widget %p: ", child->widget);
{
gint min, nat;
gtk_widget_get_preferred_width(child->widget, &min, &nat);
printf("minwidth=%d natwidth=%d ", min, nat);
}
printf("thiswidth=%d span=%d\n", childwidth, colspan);
#endif
/*
* To compute width: we know that childwidth + cols->spacing
* needs to equal a certain percentage of the full width of
@ -635,6 +656,10 @@ static gint columns_compute_width(Columns *cols, widget_dim_fn_t get_width)
* before dividing by percent.
*/
fullwid = (thiswid * 100 + percent - 1) / percent;
#ifdef COLUMNS_WIDTH_DIAGNOSTICS
printf("compute_width(%p): after %p, thiswid=%d fullwid=%d\n",
cols, child->widget, thiswid, fullwid);
#endif
/*
* The above calculation assumes every widget gets
@ -649,6 +674,10 @@ static gint columns_compute_width(Columns *cols, widget_dim_fn_t get_width)
retwidth += 2*gtk_container_get_border_width(GTK_CONTAINER(cols));
#ifdef COLUMNS_WIDTH_DIAGNOSTICS
printf("compute_width(%p): done, returning %d\n", cols, retwidth);
#endif
return retwidth;
}