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GtkScale: Add style classes for marks

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This enables better styling of the slider in the presence of
marks. Based on a patch by Bastien Nocera,
https://bugzilla.gnome.org/show_bug.cgi?id=643685
This commit is contained in:
Matthias Clasen 2011-03-03 16:47:55 -05:00
parent 2a9d130ed2
commit 77e46de0e1
2 changed files with 49 additions and 3 deletions
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30
gtk/gtkscale.c
View File

@ -77,7 +77,6 @@
* unrelated code portions otherwise
*/
typedef struct _GtkScaleMark GtkScaleMark;
struct _GtkScalePrivate
@ -1459,6 +1458,7 @@ void
gtk_scale_clear_marks (GtkScale *scale)
{
GtkScalePrivate *priv;
GtkStyleContext *context;
g_return_if_fail (GTK_IS_SCALE (scale));
@ -1468,6 +1468,10 @@ gtk_scale_clear_marks (GtkScale *scale)
g_slist_free (priv->marks);
priv->marks = NULL;
context = gtk_widget_get_style_context (GTK_WIDGET (scale));
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW);
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE);
_gtk_range_set_stop_values (GTK_RANGE (scale), NULL, 0);
gtk_widget_queue_resize (GTK_WIDGET (scale));
@ -1518,6 +1522,8 @@ gtk_scale_add_mark (GtkScale *scale,
GSList *m;
gdouble *values;
gint n, i;
GtkStyleContext *context;
int all_pos;
g_return_if_fail (GTK_IS_SCALE (scale));
@ -1535,18 +1541,40 @@ gtk_scale_add_mark (GtkScale *scale,
priv->marks = g_slist_insert_sorted (priv->marks, mark,
(GCompareFunc) compare_marks);
#define MARKS_ABOVE 1
#define MARKS_BELOW 2
all_pos = 0;
n = g_slist_length (priv->marks);
values = g_new (gdouble, n);
for (m = priv->marks, i = 0; m; m = m->next, i++)
{
mark = m->data;
values[i] = mark->value;
if (mark->position == GTK_POS_TOP)
all_pos |= MARKS_ABOVE;
else
all_pos |= MARKS_BELOW;
}
_gtk_range_set_stop_values (GTK_RANGE (scale), values, n);
g_free (values);
/* Set the style classes for the slider, so it could
* point to the right direction when marks are present
*/
context = gtk_widget_get_style_context (GTK_WIDGET (scale));
if (all_pos & MARKS_ABOVE)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE);
else
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE);
if (all_pos & MARKS_BELOW)
gtk_style_context_add_class (context, GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW);
else
gtk_style_context_remove_class (context, GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW);
gtk_widget_queue_resize (GTK_WIDGET (scale));
}

18
gtk/gtkstylecontext.h
View File

@ -276,6 +276,24 @@ struct _GtkStyleContextClass
*/
#define GTK_STYLE_CLASS_SCALE "scale"
/**
* GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE:
*
* A CSS class to match scale widgets with marks attached,
* all the marks are above for horizontal #GtkScale.
* left for vertical #GtkScale.
*/
#define GTK_STYLE_CLASS_SCALE_HAS_MARKS_ABOVE "scale-has-marks-above"
/**
* GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW:
*
* A CSS class to match scale widgets with marks attached,
* all the marks are below for horizontal #GtkScale,
* right for vertical #GtkScale.
*/
#define GTK_STYLE_CLASS_SCALE_HAS_MARKS_BELOW "scale-has-marks-below"
/**
* GTK_STYLE_CLASS_HEADER:
*