gboolean
rcm_gray_motion_notify_event (GtkWidget *widget,
GdkEventMotion *event,
RcmGray *circle)
{
gint x, y;
GdkGCValues values;
values.function = GDK_INVERT;
xor_gc = gdk_gc_new_with_values (Current.From->preview->window,
&values,
GDK_GC_FUNCTION);
if (circle->action_flag == DRAG_START)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_large_circle (circle->preview->window,
style->black_gc,
circle->gray_sat);
circle->action_flag = DRAGING;
}
else
{
color_rotate_draw_little_circle (widget->window, xor_gc,
circle->hue, circle->satur); /* erase */
}
x = event->x - GRAY_CENTER - LITTLE_RADIUS;
y = GRAY_CENTER - event->y + LITTLE_RADIUS;
circle->hue = angle_mod_2PI (arctg (y, x));
circle->satur = sqrt (SQR (x) + SQR (y)) / GRAY_RADIUS;
if (circle->satur > 1.0)
circle->satur = 1;
color_rotate_draw_little_circle (widget->window, xor_gc,
circle->hue, circle->satur);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->hue_entry),
circle->hue * rcm_units_factor(Current.Units));
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->satur_entry),
circle->satur);
if (Current.RealTime)
rcm_render_preview (Current.Bna->after);
gdk_event_request_motions (event);
return TRUE;
}
gboolean
rcm_gray_expose_event (GtkWidget *widget,
GdkEventExpose *event,
RcmGray *circle)
{
cairo_t *cr = gdk_cairo_create (gtk_widget_get_window (widget));
cairo_translate (cr, 0.5, 0.5);
color_rotate_draw_little_circle (cr, circle->hue, circle->satur);
color_rotate_draw_large_circle (cr, circle->gray_sat);
cairo_destroy (cr);
return TRUE;
}
gboolean
rcm_gray_expose_event (GtkWidget *widget,
GdkEventExpose *event,
RcmGray *circle)
{
if (circle->action_flag == VIRGIN)
{
GtkStyle *style = gtk_widget_get_style (widget);
color_rotate_draw_little_circle (widget->window,
style->black_gc,
circle->hue, circle->satur);
color_rotate_draw_large_circle (widget->window,
style->black_gc,
circle->gray_sat);
}
return TRUE;
}
gboolean
rcm_gray_release_event (GtkWidget *widget,
GdkEventButton *event,
RcmGray *circle)
{
if (circle->action_flag == DRAGING)
{
GtkStyle *style = gtk_widget_get_style (widget);
color_rotate_draw_little_circle (widget->window,
style->black_gc,
circle->hue,
circle->satur);
}
circle->action_flag = VIRGIN;
rcm_render_preview (Current.Bna->after);
return TRUE;
}
gboolean
rcm_gray_button_press_event (GtkWidget *widget,
GdkEventButton *event,
RcmGray *circle)
{
GtkStyle *style = gtk_widget_get_style (widget);
int x, y;
x = event->x - GRAY_CENTER - LITTLE_RADIUS;
y = GRAY_CENTER - event->y + LITTLE_RADIUS;
circle->action_flag = DRAG_START;
circle->hue = angle_mod_2PI(arctg(y, x));
circle->satur = sqrt (SQR (x) + SQR (y)) / GRAY_RADIUS;
if (circle->satur > 1.0)
circle->satur = 1;
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_little_circle (widget->window,
style->black_gc,
circle->hue, circle->satur);
color_rotate_draw_large_circle (circle->preview->window,
gtk_widget_get_style (circle->preview)->black_gc,
circle->gray_sat);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->hue_entry),
circle->hue * rcm_units_factor (Current.Units));
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->satur_entry),
circle->satur);
if (Current.RealTime)
rcm_render_preview (Current.Bna->after);
return TRUE;
}
void
rcm_set_satur (GtkWidget *entry,
RcmGray *circle)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
if (circle->action_flag != VIRGIN)
return;
circle->satur = gtk_spin_button_get_value (GTK_SPIN_BUTTON (entry));
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_little_circle (circle->preview->window,
style->black_gc,
circle->hue, circle->satur);
color_rotate_draw_large_circle (circle->preview->window,
style->black_gc,
circle->gray_sat);
rcm_render_preview (Current.Bna->after);
}
