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treeview: respect expander-size style property

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Without enforcement to the expander-size, we can end up rendering icons
rather fuzzy. This uses the expander-size style property to determine
the square for the icon, centered on what was the calculated space for
the expander.
This commit is contained in:
Christian Hergert 2016-05-06 16:12:29 +03:00 committed by Matthias Clasen
parent 1918fefbd4
commit d6a29e1b8c
1 changed files with 17 additions and 0 deletions
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17
gtk/gtktreeview.c
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@ -10296,11 +10296,13 @@ gtk_tree_view_draw_arrow (GtkTreeView *tree_view,
gint x2;
gint vertical_separator;
GtkCellRendererState flags = 0;
gint expander_size;
widget = GTK_WIDGET (tree_view);
context = gtk_widget_get_style_context (widget);
gtk_widget_style_get (widget,
"expander-size", &expander_size,
"vertical-separator", &vertical_separator,
NULL);
@ -10335,6 +10337,21 @@ gtk_tree_view_draw_arrow (GtkTreeView *tree_view,
gtk_style_context_set_state (context, state);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_EXPANDER);
if (expander_size > 0)
{
if (expander_size < area.width && area.width % expander_size != 0)
{
area.x += (area.width % expander_size) / 2;
area.width = expander_size;
}
if (expander_size < area.height && area.height % expander_size != 0)
{
area.y += (area.height % expander_size) / 2;
area.height = expander_size;
}
}
gtk_render_expander (context, cr,
area.x, area.y,
area.width, area.height);