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app: add boolean draw_beta property to GimpDial 

so it can be used to pick just one angle.
This commit is contained in:
Michael Natterer 2014-05-25 20:24:47 +02:00
parent 06f5e47a0e
commit 5fbcc70c0c
1 changed files with 70 additions and 43 deletions
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41
app/widgets/gimpdial.c
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@ -46,6 +46,7 @@ enum
PROP_0,
PROP_BORDER_WIDTH,
PROP_BACKGROUND,
PROP_DRAW_BETA,
PROP_ALPHA,
PROP_BETA,
PROP_CLOCKWISE
@ -63,6 +64,7 @@ struct _GimpDialPrivate
{
gint border_width;
GimpDialBackground background;
gboolean draw_beta;
gdouble alpha;
gdouble beta;
@ -113,7 +115,8 @@ static void gimp_dial_draw_arrows (cairo_t *cr,
gint size,
gdouble alpha,
gdouble beta,
gboolean clockwise);
gboolean clockwise,
gboolean draw_beta);
G_DEFINE_TYPE (GimpDial, gimp_dial, GTK_TYPE_WIDGET)
@ -157,6 +160,13 @@ gimp_dial_class_init (GimpDialClass *klass)
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_DRAW_BETA,
g_param_spec_boolean ("draw-beta",
NULL, NULL,
TRUE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_ALPHA,
g_param_spec_double ("alpha",
NULL, NULL,
@ -221,6 +231,11 @@ gimp_dial_set_property (GObject *object,
gtk_widget_queue_draw (GTK_WIDGET (dial));
break;
case PROP_DRAW_BETA:
dial->priv->draw_beta = g_value_get_boolean (value);
gtk_widget_queue_draw (GTK_WIDGET (dial));
break;
case PROP_ALPHA:
dial->priv->alpha = g_value_get_double (value);
gtk_widget_queue_draw (GTK_WIDGET (dial));
@ -260,6 +275,10 @@ gimp_dial_get_property (GObject *object,
g_value_set_enum (value, dial->priv->background);
break;
case PROP_DRAW_BETA:
g_value_set_boolean (value, dial->priv->draw_beta);
break;
case PROP_ALPHA:
g_value_set_double (value, dial->priv->alpha);
break;
@ -406,7 +425,8 @@ gimp_dial_expose_event (GtkWidget *widget,
gimp_dial_draw_background (cr, size, dial->priv->background);
gimp_dial_draw_arrows (cr, size,
dial->priv->alpha, dial->priv->beta,
dial->priv->clockwise);
dial->priv->clockwise,
dial->priv->draw_beta);
cairo_destroy (cr);
}
@ -485,7 +505,8 @@ gimp_dial_button_press_event (GtkWidget *widget,
&distance);
dial->priv->last_angle = angle;
if (distance > SEGMENT_FRACTION &&
if (dial->priv->draw_beta &&
distance > SEGMENT_FRACTION &&
MIN (get_angle_distance (dial->priv->alpha, angle),
get_angle_distance (dial->priv->beta, angle)) < G_PI / 12)
{
@ -677,16 +698,14 @@ gimp_dial_draw_arrows (cairo_t *cr,
gint size,
gdouble alpha,
gdouble beta,
gboolean clockwise)
gboolean clockwise,
gboolean draw_beta)
{
gint radius = size / 2.0 - 1.5;
gint direction = clockwise ? -1 : 1;
gint slice_dist;
gdouble slice;
#define REL 0.8
#define DEL 0.1
#define TICK 10
cairo_save (cr);
@ -711,6 +730,13 @@ gimp_dial_draw_arrows (cairo_t *cr,
ROUND (radius + radius * REL * cos (alpha + DEL)),
ROUND (radius - radius * REL * sin (alpha + DEL)));
if (draw_beta)
{
gint slice_dist;
gdouble slice;
#define TICK 10
cairo_move_to (cr, radius, radius);
cairo_line_to (cr,
ROUND (radius + radius * cos (beta)),
@ -750,6 +776,7 @@ gimp_dial_draw_arrows (cairo_t *cr,
gimp_cairo_add_arc (cr, radius, radius, slice_dist,
alpha, slice);
}
cairo_set_line_width (cr, 3.0);
cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.6);