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boxlayout: Compute opposite size properly

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For size -1 in the opposite orientation, GtkBoxLayout used to measure
the children based on their min size in the box's orientation instead of
-1. That wasn't really intended, but was a side effect of how the sizing
code did (not) distribute extra size above the minimum size.

This is clearly not what we want.
What we want is measuring the orientation as is for size -1. Then we
want to just take the maximum of all children and use that.

A reftest is incldued that ensures a vbox wraps a label just like an
hbox does.
This commit is contained in:
Benjamin Otte 2021-11-05 20:30:49 +01:00
parent 8e27fc7f9b
commit 5c9ae28937
4 changed files with 86 additions and 4 deletions
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52
gtk/gtkboxlayout.c
View File

@ -256,11 +256,46 @@ gtk_box_layout_compute_size (GtkBoxLayout *self,
static void
gtk_box_layout_compute_opposite_size (GtkBoxLayout *self,
GtkWidget *widget,
int for_size,
int *minimum,
int *natural,
int *min_baseline,
int *nat_baseline)
{
GtkWidget *child;
int largest_min = 0, largest_nat = 0;
for (child = gtk_widget_get_first_child (widget);
child != NULL;
child = gtk_widget_get_next_sibling (child))
{
int child_min = 0;
int child_nat = 0;
if (!gtk_widget_should_layout (child))
continue;
gtk_widget_measure (child,
OPPOSITE_ORIENTATION (self->orientation),
-1,
&child_min, &child_nat,
NULL, NULL);
largest_min = MAX (largest_min, child_min);
largest_nat = MAX (largest_nat, child_nat);
}
*minimum = largest_min;
*natural = largest_nat;
}
static void
gtk_box_layout_compute_opposite_size_for_size (GtkBoxLayout *self,
GtkWidget *widget,
int for_size,
int *minimum,
int *natural,
int *min_baseline,
int *nat_baseline)
{
GtkWidget *child;
int nvis_children;
@ -437,9 +472,18 @@ gtk_box_layout_measure (GtkLayoutManager *layout_manager,
if (self->orientation != orientation)
{
gtk_box_layout_compute_opposite_size (self, widget, for_size,
minimum, natural,
min_baseline, nat_baseline);
if (for_size < 0)
{
gtk_box_layout_compute_opposite_size (self, widget,
minimum, natural,
min_baseline, nat_baseline);
}
else
{
gtk_box_layout_compute_opposite_size_for_size (self, widget, for_size,
minimum, natural,
min_baseline, nat_baseline);
}
}
else
{

2
testsuite/reftests/meson.build
View File

@ -498,6 +498,8 @@ testdata = [
'unresolvable.css',
'unresolvable.ref.ui',
'unresolvable.ui',
'vbox-with-max-width-chars-label.ref.ui',
'vbox-with-max-width-chars-label.ui',
'window-border-width.ref.ui',
'window-border-width.ui',
'window-default-size.ref.ui',

18
testsuite/reftests/vbox-with-max-width-chars-label.ref.ui Normal file
View File

@ -0,0 +1,18 @@
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<object class="GtkWindow">
<property name="decorated">0</property>
<child>
<object class="GtkBox">
<property name="orientation">horizontal</property>
<child>
<object class="GtkLabel">
<property name="label">Hello World</property>
<property name="wrap">1</property>
<property name="max-width-chars">1</property>
</object>
</child>
</object>
</child>
</object>
</interface>

18
testsuite/reftests/vbox-with-max-width-chars-label.ui Normal file
View File

@ -0,0 +1,18 @@
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<object class="GtkWindow">
<property name="decorated">0</property>
<child>
<object class="GtkBox">
<property name="orientation">vertical</property>
<child>
<object class="GtkLabel">
<property name="label">Hello World</property>
<property name="wrap">1</property>
<property name="max-width-chars">1</property>
</object>
</child>
</object>
</child>
</object>
</interface>