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stack: Don't underallocate child in interpolate-size case

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In that case, we can't just rely on the stack allocation being big
enough. Especially, the child can actually be bigger than the current
stack allocation, so take that into account when positioning it.
This commit is contained in:
Timm Bäder 2016-10-28 12:56:36 +02:00
parent 8dce94c47a
commit ee4ba18d5e
1 changed files with 27 additions and 14 deletions
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41
gtk/gtkstack.c
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@ -2253,22 +2253,35 @@ gtk_stack_allocate (GtkCssGadget *gadget,
if (priv->visible_child)
{
int min, nat;
GtkAlign valign;
int min_width;
int min_height;
gtk_widget_get_preferred_height_for_width (priv->visible_child->widget,
allocation->width,
&min, &nat);
if (priv->interpolate_size)
gtk_widget_measure (priv->visible_child->widget, GTK_ORIENTATION_HORIZONTAL,
allocation->height, &min_width, NULL, NULL, NULL);
child_allocation.width = MAX (child_allocation.width, min_width);
gtk_widget_measure (priv->visible_child->widget, GTK_ORIENTATION_VERTICAL,
child_allocation.width, &min_height, NULL, NULL, NULL);
child_allocation.height = MAX (child_allocation.height, min_height);
if (child_allocation.width > allocation->width)
{
valign = gtk_widget_get_valign (priv->visible_child->widget);
child_allocation.height = MAX (nat, allocation->height);
if (valign == GTK_ALIGN_END &&
child_allocation.height > allocation->height)
child_allocation.y -= nat - allocation->height;
else if (valign == GTK_ALIGN_CENTER &&
child_allocation.height > allocation->height)
child_allocation.y -= (nat - allocation->height) / 2;
GtkAlign halign = gtk_widget_get_halign (priv->visible_child->widget);
if (halign == GTK_ALIGN_CENTER || halign == GTK_ALIGN_FILL)
child_allocation.x = (allocation->width - child_allocation.width) / 2;
else if (halign == GTK_ALIGN_END)
child_allocation.x = (allocation->width - child_allocation.width);
}
if (child_allocation.height > allocation->height)
{
GtkAlign valign = gtk_widget_get_valign (priv->visible_child->widget);
if (valign == GTK_ALIGN_CENTER || valign == GTK_ALIGN_FILL)
child_allocation.y = (allocation->height - child_allocation.height) / 2;
else if (valign == GTK_ALIGN_END)
child_allocation.x = (allocation->height - child_allocation.height);
}
gtk_widget_size_allocate (priv->visible_child->widget, &child_allocation);