osmith
/
wireshark
forked from osmocom/wireshark
1
0
Fork 0
Code Pull Requests Releases Wiki Activity
wireshark/gtk/gtkvumeter.c

1378 lines
46 KiB
C
Raw Blame History

/***************************************************************************
* gtkvumeter.c
*
* $Id$
*
*
* Fri Jan 10 20:06:23 2003
* Copyright 2003 Todd Goyen
* wettoad@knighthoodofbuh.org
*
* Mon May 01 04:04:00 2006
* Copyright 2006 Ulf Lamping
* ulf.lamping@web.de
*
* Source code is LGPL'd,
* but may be distributed under any other open source license
****************************************************************************/
#include <math.h>
#include <gtk/gtk.h>
#include "gtk/gtkvumeter.h"
#define MIN_DYNAMIC_SIDE 40
#define SMALL_PITCH_LINE 2
#define LARGE_PITCH_LINE 4
#define SPARE_LEFT 1
#define SPARE_RIGHT 1
#define SPARE_TOP 1
#define SPARE_BOTTOM 1
static void gtk_vumeter_init (GtkVUMeter *vumeter);
static void gtk_vumeter_class_init (GtkVUMeterClass *class);
static void gtk_vumeter_destroy (GtkObject *object);
static void gtk_vumeter_realize (GtkWidget *widget);
static void gtk_vumeter_size_calculate (GtkWidget *widget, GtkRequisition *requisition);
static void gtk_vumeter_size_request (GtkWidget *widget, GtkRequisition *requisition);
static void gtk_vumeter_size_allocate (GtkWidget *widget, GtkAllocation *allocation);
static gboolean gtk_vumeter_expose (GtkWidget *widget, GdkEventExpose *event);
static void gtk_vumeter_free_colors (GtkVUMeter *vumeter);
static void gtk_vumeter_setup_colors (GtkVUMeter *vumeter);
static gint gtk_vumeter_sound_level_to_draw_level (GtkVUMeter *vumeter, gint sound_level);
static gboolean gtk_vumeter_redraw_timeout (gpointer data);
static void gtk_vumeter_setup_scale_items(GtkVUMeter *vumeter, GList *scale_items);
static GtkWidgetClass *parent_class = NULL;
GType gtk_vumeter_get_type (void)
{
static GType vumeter_type = 0;
if (!vumeter_type) {
static const GTypeInfo vumeter_info = {
sizeof (GtkVUMeterClass),
NULL, NULL,
(GClassInitFunc) gtk_vumeter_class_init, NULL, NULL,
sizeof (GtkVUMeter), 0, (GInstanceInitFunc) gtk_vumeter_init,
NULL
};
vumeter_type = g_type_register_static (GTK_TYPE_WIDGET, "GtkVUMeter", &vumeter_info, 0);
}
return vumeter_type;
}
/**
* gtk_vumeter_new:
*
* Creates a new VUMeter widget.
*/
GtkWidget* gtk_vumeter_new (void)
{
GtkVUMeter *vumeter;
vumeter = GTK_VUMETER (g_object_new (GTK_TYPE_VUMETER, NULL));
return GTK_WIDGET (vumeter);
}
static void gtk_vumeter_init (GtkVUMeter *vumeter)
{
vumeter->vertical = TRUE;
vumeter->scale_inverted = FALSE;
vumeter->thickness = 30;
vumeter->reduced_thickness = 0;
vumeter->scaling = GTK_VUMETER_SCALING_LINEAR;
vumeter->scale_items = NULL;
vumeter->scale_pitch_holes = 0;
vumeter->padding_left = 1;
vumeter->padding_right = 1;
vumeter->padding_top = 1;
vumeter->padding_bottom = 1;
vumeter->colormap = NULL;
vumeter->colors = 0;
vumeter->f_gc = NULL;
vumeter->b_gc = NULL;
vumeter->f_colors = NULL;
vumeter->b_colors = NULL;
vumeter->f_brightness = 65535;
vumeter->b_brightness = 49151;
vumeter->yellow_level = 16383;
vumeter->colors_inverted = FALSE;
vumeter->level = 0;
vumeter->level_min = 0;
vumeter->level_max = 32767;
vumeter->peak = FALSE;
vumeter->peak_level = 0;
vumeter->peak_timeout = 0;
vumeter->peak_hold_factor = 0;
vumeter->peak_hold = 0;
vumeter->peak_falloff_mode = GTK_VUMETER_PEAK_FALLOFF_MEDIUM;
vumeter->peak_falloff_rate = 3278;
}
static void gtk_vumeter_class_init (GtkVUMeterClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
parent_class = g_type_class_ref (gtk_widget_get_type ());
object_class->destroy = gtk_vumeter_destroy;
widget_class->realize = gtk_vumeter_realize;
widget_class->expose_event = gtk_vumeter_expose;
widget_class->size_request = gtk_vumeter_size_request;
widget_class->size_allocate = gtk_vumeter_size_allocate;
}
static void gtk_vumeter_destroy (GtkObject *object)
{
GtkVUMeter *vumeter = GTK_VUMETER (object);
if(vumeter->peak_timeout) {
g_source_remove(vumeter->peak_timeout);
}
gtk_vumeter_free_colors (vumeter);
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void gtk_vumeter_realize (GtkWidget *widget)
{
GtkVUMeter *vumeter;
GdkWindowAttr attributes;
gint attributes_mask;
GtkAllocation widget_alloc;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_VUMETER (widget));
#if GTK_CHECK_VERSION(2,20,0)
gtk_widget_set_realized(widget, TRUE);
#else
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
#endif
vumeter = GTK_VUMETER (widget);
#if GTK_CHECK_VERSION(2,18,0)
gtk_widget_get_allocation(widget, &widget_alloc);
#else
widget_alloc = widget->allocation;
#endif
attributes.x = widget_alloc.x;
attributes.y = widget_alloc.y;
attributes.width = widget_alloc.width;
attributes.height = widget_alloc.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
#if GTK_CHECK_VERSION(2,18,0)
gtk_widget_set_window(widget, gdk_window_new(gtk_widget_get_parent_window(widget), &attributes, attributes_mask));
#else
widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
#endif
#if GTK_CHECK_VERSION(2,14,0)
gtk_widget_set_style(widget, gtk_style_attach(gtk_widget_get_style(widget), gtk_widget_get_window(widget)));
gdk_window_set_user_data (gtk_widget_get_window(widget), widget);
gtk_style_set_background (gtk_widget_get_style(widget), gtk_widget_get_window(widget), GTK_STATE_NORMAL);
#else
widget->style = gtk_style_attach (widget->style, widget->window);
gdk_window_set_user_data (widget->window, widget);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
#endif
/* colors */
vumeter->colormap = gdk_colormap_get_system ();
gtk_vumeter_setup_colors (vumeter);
}
static void gtk_vumeter_size_calculate (GtkWidget *widget, GtkRequisition *requisition)
{
GtkVUMeter *vumeter;
gint max_x = 0;
gint max_y = 0;
gint layout_width;
gint layout_height;
gint pitches = 0;
GList * current;
g_return_if_fail (GTK_IS_VUMETER (widget));
g_return_if_fail (requisition != NULL);
vumeter = GTK_VUMETER (widget);
if(vumeter->scale_items != NULL) {
/* iterate through scale items to get the highest scale item */
for (current = vumeter->scale_items; current != NULL; current = g_list_next(current)) {
GtkVUMeterScaleItem * item = current->data;
pitches++;
if(item->label) {
PangoLayout * layout = gtk_widget_create_pango_layout (widget, item->label);
pango_layout_get_pixel_size(layout, &layout_width, &layout_height);
/* XXX - memleak */
} else {
layout_width = 0;
layout_height = 0;
}
if (vumeter->vertical == TRUE) {
max_x = MAX(max_x, item->large ? LARGE_PITCH_LINE : SMALL_PITCH_LINE);
max_y = MAX(max_y, 1);
if(item->label) {
max_x = MAX(max_x, LARGE_PITCH_LINE+3+layout_width);
max_y = MAX(max_y, layout_height);
}
} else {
max_x = MAX(max_x, 1);
max_y = MAX(max_y, item->large ? LARGE_PITCH_LINE : SMALL_PITCH_LINE);
if(item->label) {
max_x = MAX(max_x, layout_width);
max_y = MAX(max_y, LARGE_PITCH_LINE+/*3+*/layout_height-2);
}
}
}
}
pitches = MAX((vumeter->scale_pitch_holes+1)*pitches-1, MIN_DYNAMIC_SIDE);
if (vumeter->vertical == TRUE) {
vumeter->padding_left = SPARE_LEFT;
vumeter->padding_right = SPARE_RIGHT + max_x;
vumeter->padding_top = SPARE_TOP + max_y / 2;
vumeter->padding_bottom = SPARE_BOTTOM + max_y / 2;
requisition->width = vumeter->padding_left + vumeter->thickness + vumeter->padding_right;
requisition->height = vumeter->padding_top + pitches + vumeter->padding_bottom;
} else {
vumeter->padding_left = SPARE_LEFT + max_x / 2;
vumeter->padding_right = SPARE_RIGHT + max_x / 2;
vumeter->padding_top = SPARE_TOP;
vumeter->padding_bottom = SPARE_BOTTOM + max_y;
requisition->width = vumeter->padding_left + pitches + vumeter->padding_right;
requisition->height = vumeter->padding_top + vumeter->thickness + vumeter->padding_bottom;
}
}
static void gtk_vumeter_size_request (GtkWidget *widget, GtkRequisition *requisition)
{
gtk_vumeter_size_calculate(widget, requisition);
}
static void gtk_vumeter_size_allocate (GtkWidget *widget, GtkAllocation *allocation)
{
GtkVUMeter *vumeter;
GtkRequisition requisition;
g_return_if_fail (GTK_IS_VUMETER (widget));
g_return_if_fail (allocation != NULL);
#if GTK_CHECK_VERSION(2,18,0)
gtk_widget_set_allocation(widget, allocation);
#else
widget->allocation = *allocation;
#endif
vumeter = GTK_VUMETER (widget);
gtk_vumeter_size_calculate(widget, &requisition);
#if GTK_CHECK_VERSION(2,20,0)
if (gtk_widget_get_realized(widget)) {
#else
if (GTK_WIDGET_REALIZED (widget)) {
#endif
#if GTK_CHECK_VERSION(2,14,0)
gdk_window_move_resize (gtk_widget_get_window(widget), allocation->x, allocation->y,
#else
gdk_window_move_resize (widget->window, allocation->x, allocation->y,
#endif
MAX (allocation->width, requisition.width),
MAX (allocation->height, requisition.height));
/* Fix the colours */
gtk_vumeter_setup_colors (vumeter);
}
}
static gboolean gtk_vumeter_expose (GtkWidget *widget, GdkEventExpose *event)
{
GtkVUMeter *vumeter;
gint index, level, peak_level = 0;
gint width, height;
gint w, h, inc;
GList * current;
GtkAllocation widget_alloc;
#if GTK_CHECK_VERSION(2,14,0)
GdkWindow *widget_window = gtk_widget_get_window(widget);
#else
GdkWindow *widget_window = widget->window;
#endif
g_return_val_if_fail (GTK_IS_VUMETER (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
vumeter = GTK_VUMETER (widget);
level = gtk_vumeter_sound_level_to_draw_level (vumeter, vumeter->level);
if (vumeter->peak == TRUE) {
peak_level = gtk_vumeter_sound_level_to_draw_level (vumeter, vumeter->peak_level);
}
#if GTK_CHECK_VERSION(2,18,0)
gtk_widget_get_allocation(widget, &widget_alloc);
#else
widget_alloc = widget->allocation;
#endif
/* the dimentions of the bar (leaving some space for the scale) */
width = widget_alloc.width - vumeter->padding_left - vumeter->padding_right;
height = widget_alloc.height - vumeter->padding_top - vumeter->padding_bottom;
/* clear widget and draw border */
gtk_paint_box (gtk_widget_get_style(widget), widget_window, GTK_STATE_NORMAL, GTK_SHADOW_IN,
NULL, widget, "trough", 0, 0, widget_alloc.width, widget_alloc.height);
#if 0
/* clear bar only */
gtk_paint_box (widget->style, widget_window, GTK_STATE_NORMAL, GTK_SHADOW_NONE,
NULL, widget, "trough", vumeter->padding_left, vumeter->padding_top, width+1, height+1);
#endif
if (vumeter->vertical == TRUE) {
if (vumeter->scale_inverted == TRUE) {
h = height + vumeter->padding_top;
inc = -1;
} else {
h = vumeter->padding_top;
inc = 1;
}
/* draw scale */
if(vumeter->scale_items != NULL) {
/* iterate through scale items */
for (current = vumeter->scale_items; current != NULL; current = g_list_next(current)) {
GtkVUMeterScaleItem * item = current->data;
int scale_level = gtk_vumeter_sound_level_to_draw_level (vumeter, item->level);
/* XXX - use a fixed color for the scale? */
gdk_draw_line (widget_window, vumeter->b_gc[scale_level],
vumeter->padding_left+width, h + inc*scale_level,
vumeter->padding_left+width+(item->large==TRUE ? LARGE_PITCH_LINE : SMALL_PITCH_LINE)-1, h + inc*scale_level);
if(item->label) {
int layout_width;
int layout_height;
PangoLayout * layout = gtk_widget_create_pango_layout (widget, item->label);
pango_layout_get_pixel_size(layout, &layout_width, &layout_height);
gdk_draw_layout(widget_window,
vumeter->b_gc[scale_level],
vumeter->padding_left+width+vumeter->padding_right-1-layout_width,
h + inc*scale_level - layout_height/2 - 1,
layout);
}
}
}
/* draw background gradient */
for (index = 0; index < level; index++, h += inc) {
gdk_draw_line (widget_window, vumeter->b_gc[index],
vumeter->padding_left+vumeter->reduced_thickness, h,
vumeter->padding_left+width-1-vumeter->reduced_thickness, h);
}
/* draw foreground gradient */
for (index = level; index < height; index++, h += inc) {
gdk_draw_line (widget_window, vumeter->f_gc[index],
vumeter->padding_left,h,
vumeter->padding_left+width-1, h);
}
/* Draw the peak */
if (vumeter->peak == TRUE) {
/* Reset w */
index = MAX (peak_level - 1, 0);
for (; index < MIN (peak_level + 1, height - 2); index++) {
h = vumeter->scale_inverted == TRUE ? height +vumeter->padding_top - (index + 2) : vumeter->padding_top + index + 1;
gdk_draw_line (widget_window, vumeter->f_gc[index], vumeter->padding_left, h, vumeter->padding_left+width-1, h);
}
}
} else { /* Horizontal */
/* the start point of the bar */
if (vumeter->scale_inverted == TRUE) {
w = width-1 + vumeter->padding_left;
inc = -1;
} else {
w = vumeter->padding_left;
inc = 1;
}
/* draw scale */
if(vumeter->scale_items != NULL) {
/* iterate through scale items */
for (current = vumeter->scale_items; current != NULL; current = g_list_next(current)) {
GtkVUMeterScaleItem * item = current->data;
int scale_level = gtk_vumeter_sound_level_to_draw_level (vumeter, item->level);
/* XXX - use a fixed color for the scale? */
gdk_draw_line (widget_window, vumeter->b_gc[scale_level],
w + inc*scale_level, vumeter->padding_top+height,
w + inc*scale_level, vumeter->padding_top+height+(item->large==TRUE ? LARGE_PITCH_LINE : SMALL_PITCH_LINE)-1);
if(item->label) {
int layout_width;
int layout_height;
PangoLayout * layout = gtk_widget_create_pango_layout (widget, item->label);
pango_layout_get_pixel_size(layout, &layout_width, &layout_height);
gdk_draw_layout(widget_window, vumeter->b_gc[scale_level],
w + inc*scale_level - layout_width/2,
height + vumeter->padding_top + 3,
layout);
}
}
}
/* draw background gradient */
for (index = 0; index < level; index++, w += inc) {
gdk_draw_line (widget_window, vumeter->b_gc[index],
w, vumeter->padding_top+vumeter->reduced_thickness,
w, vumeter->padding_top+height-1-vumeter->reduced_thickness);
}
/* draw foreground gradient */
for (index = level; index < width; index++, w+= inc) {
gdk_draw_line (widget_window, vumeter->f_gc[index],
w, vumeter->padding_top,
w, vumeter->padding_top+height-1);
}
/* Draw the peak */
if (vumeter->peak == TRUE) {
/* Reset w */
index = MAX (peak_level - 1, 0);
w = vumeter->scale_inverted == TRUE ? width + vumeter->padding_left - (index + 1) : vumeter->padding_left + index + 1;
for (; index <= MIN (peak_level, width - 2); index++, w+= inc) {
gdk_draw_line (widget_window, vumeter->f_gc[index], w, vumeter->padding_top, w, vumeter->padding_top+height-1);
}
}
}
return TRUE;
}
static void gtk_vumeter_free_colors (GtkVUMeter *vumeter)
{
gint index;
if (vumeter->colors == 0) { return; }
/* Free old gc's */
if (vumeter->f_gc && vumeter->b_gc) {
for (index = 0; index < vumeter->colors; index++) {
if (vumeter->f_gc[index]) {
g_object_unref (G_OBJECT(vumeter->f_gc[index]));
}
if (vumeter->b_gc[index]) {
g_object_unref (G_OBJECT(vumeter->b_gc[index]));
}
}
g_free(vumeter->f_gc);
g_free(vumeter->b_gc);
vumeter->f_gc = NULL;
vumeter->b_gc = NULL;
}
/* Free old Colors */
if (vumeter->f_colors) {
gdk_colormap_free_colors (vumeter->colormap, vumeter->f_colors, vumeter->colors);
g_free (vumeter->f_colors);
vumeter->f_colors = NULL;
}
if (vumeter->b_colors) {
gdk_colormap_free_colors (vumeter->colormap, vumeter->b_colors, vumeter->colors);
g_free (vumeter->b_colors);
vumeter->b_colors = NULL;
}
}
static void gtk_vumeter_setup_colors (GtkVUMeter *vumeter)
{
gint index;
gint f_step, b_step;
gint first, second;
gint max = 0, min = 0, log_max = 0;
GtkAllocation vumeter_alloc;
g_return_if_fail (vumeter->colormap != NULL);
gtk_vumeter_free_colors (vumeter);
#if GTK_CHECK_VERSION(2,18,0)
gtk_widget_get_allocation(GTK_WIDGET(vumeter), &vumeter_alloc);
#else
vumeter_alloc = GTK_WIDGET(vumeter)->allocation;
#endif
/* Set new size */
if (vumeter->vertical == TRUE) {
vumeter->colors = MAX(vumeter_alloc.height - vumeter->padding_top - vumeter->padding_bottom, 0);
} else {
vumeter->colors = MAX(vumeter_alloc.width - vumeter->padding_left - vumeter->padding_right, 0);
}
/* allocate new memory */
vumeter->f_colors = g_malloc (vumeter->colors * sizeof(GdkColor));
vumeter->b_colors = g_malloc (vumeter->colors * sizeof(GdkColor));
vumeter->f_gc = g_malloc (vumeter->colors * sizeof(GdkGC *));
vumeter->b_gc = g_malloc (vumeter->colors * sizeof(GdkGC *));
/* Initialize stuff */
if (vumeter->scaling == GTK_VUMETER_SCALING_LINEAR) {
first = 1+gtk_vumeter_sound_level_to_draw_level (vumeter, vumeter->yellow_level);
second = vumeter->colors;
} else {
max = vumeter->level_max;
min = vumeter->level_min;
log_max = (gint) (- 20.0 * log10(1.0/(max - min + 1.0)));
first = (gint)((gdouble)vumeter->colors * 6.0 / log_max);
second = (gint)((gdouble)vumeter->colors * 18.0 / log_max);
}
if(vumeter->colors_inverted) {
vumeter->f_colors[0].red = 0;
vumeter->f_colors[0].green = vumeter->f_brightness;
vumeter->f_colors[0].blue = 0;
vumeter->b_colors[0].red = 0;
vumeter->b_colors[0].green = vumeter->b_brightness;
vumeter->b_colors[0].blue = 0;
/* Allocate from Green to Yellow */
f_step = vumeter->f_brightness / (first - 1);
b_step = vumeter->b_brightness / (first - 1);
for (index = 1; index < first; index++) {
/* foreground */
vumeter->f_colors[index].red = vumeter->f_colors[index - 1].red + f_step;
vumeter->f_colors[index].green = vumeter->f_brightness;
vumeter->f_colors[index].blue = 0;
/* background */
vumeter->b_colors[index].red = vumeter->b_colors[index - 1].red + b_step;
vumeter->b_colors[index].green = vumeter->b_brightness;
vumeter->b_colors[index].blue = 0;
}
/* Allocate from Yellow to Red */
if(second != first) {
f_step = vumeter->f_brightness / (second - first);
b_step = vumeter->b_brightness / (second - first);
for (index = first; index < second; index++) {
/* foreground */
vumeter->f_colors[index].red = vumeter->f_colors[index - 1].red;
vumeter->f_colors[index].green = vumeter->f_colors[index - 1].green - f_step;
vumeter->f_colors[index].blue = 0;
/* background */
vumeter->b_colors[index].red = vumeter->b_colors[index - 1].red;
vumeter->b_colors[index].green = vumeter->b_colors[index - 1].green - b_step;
vumeter->b_colors[index].blue = 0;
}
}
} else {
vumeter->f_colors[0].red = vumeter->f_brightness;
vumeter->f_colors[0].green = 0;
vumeter->f_colors[0].blue = 0;
vumeter->b_colors[0].red = vumeter->b_brightness;
vumeter->b_colors[0].green = 0;
vumeter->b_colors[0].blue = 0;
/* Allocate from Red to Yellow */
f_step = vumeter->f_brightness / MAX(first - 1, 1);
b_step = vumeter->b_brightness / MAX(first - 1, 1);
for (index = 1; index < first; index++) {
/* foreground */
vumeter->f_colors[index].red = vumeter->f_brightness;
vumeter->f_colors[index].green = vumeter->f_colors[index - 1].green + f_step;
vumeter->f_colors[index].blue = 0;
/* background */
vumeter->b_colors[index].red = vumeter->b_brightness;
vumeter->b_colors[index].green = vumeter->b_colors[index - 1].green + b_step;
vumeter->b_colors[index].blue = 0;
}
/* Allocate from Yellow to Green */
f_step = vumeter->f_brightness / MAX(second - first, 1);
b_step = vumeter->b_brightness / MAX(second - first, 1);
for (index = first; index < second; index++) {
/* foreground */
vumeter->f_colors[index].red = vumeter->f_colors[index - 1].red - f_step;
vumeter->f_colors[index].green = vumeter->f_colors[index - 1].green;
vumeter->f_colors[index].blue = 0;
/* background */
vumeter->b_colors[index].red = vumeter->b_colors[index - 1].red - b_step;
vumeter->b_colors[index].green = vumeter->b_colors[index - 1].green;
vumeter->b_colors[index].blue = 0;
}
if (vumeter->scaling == GTK_VUMETER_SCALING_LOG && (vumeter->colors - second) > 0) {
/* Allocate from Green to Dark Green */
f_step = vumeter->f_brightness / 2 / (vumeter->colors - second);
b_step = vumeter->b_brightness / 2 / (vumeter->colors - second);
for (index = second; index < vumeter->colors; index++) {
/* foreground */
vumeter->f_colors[index].red = 0;
vumeter->f_colors[index].green = vumeter->f_colors[index - 1].green - f_step;
vumeter->f_colors[index].blue = 0;
/* background */
vumeter->b_colors[index].red = 0;
vumeter->b_colors[index].green = vumeter->b_colors[index - 1].green - b_step;
vumeter->b_colors[index].blue = 0;
}
}
} /* colors_inverted */
/* Allocate the Colours */
for (index = 0; index < vumeter->colors; index++) {
/* foreground */
gdk_colormap_alloc_color (vumeter->colormap, &vumeter->f_colors[index], FALSE, TRUE);
#if GTK_CHECK_VERSION(2,14,0)
vumeter->f_gc[index] = gdk_gc_new(gtk_widget_get_window(GTK_WIDGET(vumeter)));
#else
vumeter->f_gc[index] = gdk_gc_new(GTK_WIDGET(vumeter)->window);
#endif
gdk_gc_set_foreground(vumeter->f_gc[index], &vumeter->f_colors[index]);
/* background */
gdk_colormap_alloc_color (vumeter->colormap, &vumeter->b_colors[index], FALSE, TRUE);
#if GTK_CHECK_VERSION(2,14,0)
vumeter->b_gc[index] = gdk_gc_new(gtk_widget_get_window(GTK_WIDGET(vumeter)));
#else
vumeter->b_gc[index] = gdk_gc_new(GTK_WIDGET(vumeter)->window);
#endif
gdk_gc_set_foreground(vumeter->b_gc[index], &vumeter->b_colors[index]);
}
}
static gint gtk_vumeter_sound_level_to_draw_level (GtkVUMeter *vumeter, gint sound_level)
{
gdouble draw_level;
gdouble level, min, max, height;
gdouble log_level, log_max;
level = (gdouble)sound_level;
min = (gdouble)vumeter->level_min;
max = (gdouble)vumeter->level_max;
height = (gdouble)vumeter->colors;
if (vumeter->scaling == GTK_VUMETER_SCALING_LINEAR) {
draw_level = (1.0 - (level - min)/(max - min)) * (height - 1.0);
/* to avoid rounding problems */
draw_level += 0.001;
} else {
log_level = log10((level - min + 1)/(max - min + 1));
log_max = log10(1/(max - min + 1));
draw_level = log_level/log_max * (height - 1.0);
}
return ((gint)draw_level);
}
static gboolean gtk_vumeter_redraw_timeout (gpointer data)
{
GtkVUMeter *vumeter = data;
/* Immediately return if need be */
#if GTK_CHECK_VERSION(2,20,0)
if (!gtk_widget_get_realized (GTK_WIDGET(vumeter))) { return TRUE; }
#else
if (!GTK_WIDGET_REALIZED (GTK_WIDGET(vumeter))) { return TRUE; }
#endif
if (vumeter->peak == FALSE) { return TRUE; }
if (vumeter->peak_level == vumeter->level) { return TRUE; }
if(vumeter->peak_hold != 0) {
vumeter->peak_hold--;
return TRUE;
}
/* Drop the peak_level by rate */
vumeter->peak_level -= vumeter->peak_falloff_rate;
vumeter->peak_level = MAX (vumeter->peak_level, vumeter->level);
gtk_widget_queue_draw (GTK_WIDGET(vumeter));
return TRUE;
}
static GList *gtk_vumeter_clone_scale_items(GList *scale_items)
{
GList * new_list = NULL;
for ( ; scale_items != NULL; scale_items = g_list_next(scale_items)) {
GtkVUMeterScaleItem * item = scale_items->data;
GtkVUMeterScaleItem * new_item;
new_item = g_malloc(sizeof(GtkVUMeterScaleItem));
new_item->level = item->level;
new_item->large = item->large;
new_item->label = g_strdup(item->label);
new_list = g_list_append(new_list, new_item);
}
return new_list;
}
static void gtk_vumeter_setup_scale_items(GtkVUMeter *vumeter, GList *scale_items)
{
GList * new_list = NULL;
GList * new_list_item = NULL;
/* clone the whole list */
new_list = gtk_vumeter_clone_scale_items(scale_items);
/* clamp the levels */
for (new_list_item = new_list; new_list_item != NULL; new_list_item = g_list_next(new_list_item)) {
GtkVUMeterScaleItem * item = new_list_item->data;
item->level = CLAMP(item->level, vumeter->level_min, vumeter->level_max);
}
gtk_vumeter_free_scale_items(vumeter->scale_items);
vumeter->scale_items = new_list;
}
void gtk_vumeter_free_scale_items(GList *scale_items)
{
GList * current;
if(scale_items == NULL) return;
for (current = scale_items; current != NULL; current = g_list_next(current)) {
GtkVUMeterScaleItem * item = current->data;
g_free((void *) item->label);
g_free(item);
}
g_list_free(scale_items);
}
/**
* gtk_vumeter_set_orientation:
* @param vumeter the vumeter widget
* @param orientation the direction in which the graph is going for increasing values
*/
void gtk_vumeter_set_orientation (GtkVUMeter *vumeter, GtkVUMeterOrientation orientation)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
if(orientation == GTK_VUMETER_BOTTOM_TO_TOP || orientation == GTK_VUMETER_TOP_TO_BOTTOM) {
vumeter->vertical = TRUE;
} else {
vumeter->vertical = FALSE;
}
if(orientation == GTK_VUMETER_LEFT_TO_RIGHT || orientation == GTK_VUMETER_BOTTOM_TO_TOP) {
vumeter->scale_inverted = TRUE;
} else {
vumeter->scale_inverted = FALSE;
}
#if GTK_CHECK_VERSION(2,20,0)
if (gtk_widget_get_realized (GTK_WIDGET(vumeter))) {
#else
if (GTK_WIDGET_REALIZED (vumeter)) {
#endif
gtk_widget_queue_draw (GTK_WIDGET (vumeter));
}
}
/**
* gtk_vumeter_get_orientation:
* @param vumeter the vumeter widget
* @return the direction in which the graph is going for increasing values
*/
GtkVUMeterOrientation gtk_vumeter_get_orientation (GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return GTK_VUMETER_BOTTOM_TO_TOP;
}
/* XXX - might be faster using a lookup table */
if(vumeter->vertical == TRUE && vumeter->scale_inverted == TRUE) {
return GTK_VUMETER_BOTTOM_TO_TOP;
}
if(vumeter->vertical == TRUE && vumeter->scale_inverted == FALSE) {
return GTK_VUMETER_TOP_TO_BOTTOM;
}
if(vumeter->vertical == FALSE && vumeter->scale_inverted == TRUE) {
return GTK_VUMETER_LEFT_TO_RIGHT;
}
if(vumeter->vertical == FALSE && vumeter->scale_inverted == FALSE) {
return GTK_VUMETER_LEFT_TO_RIGHT;
}
g_assert_not_reached();
return GTK_VUMETER_BOTTOM_TO_TOP;
}
/**
* gtk_vumeter_set_thickness:
* @param vumeter the vumeter widget
* @param thickness gtkvumeter's minimum graph thickness in pixels (default:30)
*
* Allows the user program to change the dimension of the vumeter.
* For a vertical meter, this is the width.
* Likewise for a horizontal meter, this is the height.
*/
void gtk_vumeter_set_thickness (GtkVUMeter *vumeter, gint thickness)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
if (vumeter->thickness != thickness) {
vumeter->thickness = thickness;
vumeter->reduced_thickness = MIN(vumeter->reduced_thickness, vumeter->thickness);
gtk_widget_queue_resize (GTK_WIDGET (vumeter));
}
}
/**
* gtk_vumeter_get_thickness:
* @param vumeter the vumeter widget
* @return gtkvumeter's minimum graph thickness in pixels (default:30)
*
* For a vertical meter, this is the width.
* Likewise for a horizontal meter, this is the height.
*/
gint gtk_vumeter_get_thickness (GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return 0;
} else {
return vumeter->thickness;
}
}
/**
* gtk_vumeter_set_thickness_reduction:
* @param vumeter the vumeter widget
* @param reduced_thickness pixels to reduce the "none active" part of the graph (default:0)
*
* Allows the user program to reduce the thickness of the "background" part of the vumeter graph.
* This can be useful to distinguish the border between the foreground and background graph.
*/
void gtk_vumeter_set_thickness_reduction (GtkVUMeter *vumeter, gint reduced_thickness)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
if (vumeter->reduced_thickness != reduced_thickness) {
vumeter->reduced_thickness = reduced_thickness;
vumeter->reduced_thickness = CLAMP(vumeter->reduced_thickness, 0, vumeter->thickness/2);
gtk_widget_queue_resize (GTK_WIDGET (vumeter));
}
}
/**
* gtk_vumeter_get_thickness_reduction:
* @param vumeter the vumeter widget
* @return pixels to reduce the "none active" part of the graph (default:0)
*
* The reduced thickness of the "background" part of the vumeter graph.
*/
gint gtk_vumeter_get_thickness_reduction (GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return 0;
} else {
return vumeter->reduced_thickness;
}
}
/**
* gtk_vumeter_set_min_max:
* @param vumeter the vumeter widget
* @param min the new minimum level shown (default: 0)
* @param max the new maximum level shown (default: 32768)
*
* Sets the minimum and maximum of the VU Meters scale.
* It will increment max by one if min == max.
* And finally it will clamp the relevant levels into the min, max range.
* Either value can be NULL, to keep the current value.
*
* Don't forget to call %gtk_vumeter_set_yellow_level() if required!
*
* WARNING: negative values for min or max will currently not work!!!
*/
void gtk_vumeter_set_min_max (GtkVUMeter *vumeter, gint *min, gint *max)
{
gint mi, ma;
g_return_if_fail (GTK_IS_VUMETER (vumeter));
/* Allow min or max to be NULL */
mi = (min != NULL) ? *min : vumeter->level_min;
ma = (max != NULL) ? *max : vumeter->level_max;
/* Ensure that max > min */
vumeter->level_max = MAX(ma, mi);
vumeter->level_min = MIN(mi, ma);
if (vumeter->level_max == vumeter->level_min) {
/* Increment max so we have a range */
vumeter->level_max++;
}
/* Clamp the levels to the new range */
vumeter->level = CLAMP (vumeter->level, vumeter->level_min, vumeter->level_max);
vumeter->peak_level = CLAMP (vumeter->peak_level, vumeter->level, vumeter->level_max);
vumeter->yellow_level = CLAMP (vumeter->yellow_level, vumeter->level_min, vumeter->level_max);
gtk_widget_queue_draw (GTK_WIDGET(vumeter));
}
/**
* gtk_vumeter_get_min_max:
* @param vumeter the vumeter widget
* @param min the new minimum level shown (default: 0)
* @param max the new maximum level shown (default: 32768)
*
* The minimum and maximum of the VU Meters scale.
*/
void gtk_vumeter_get_min_max (GtkVUMeter *vumeter, gint *min, gint *max)
{
if(!GTK_IS_VUMETER (vumeter)) {
*min = 0;
*max = 0;
} else {
*min = vumeter->level_min;
*max = vumeter->level_max;
}
}
/**
* gtk_vumeter_set_level:
* @param vumeter the vumeter widget
* @param level the new level shown (default: 0)
*
* Sets new level value for the vumeter.
* The level is clamped to the min max range.
* The peak_level will be increased to level if needed.
*/
void gtk_vumeter_set_level (GtkVUMeter *vumeter, gint level)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
if (vumeter->level != level) {
vumeter->level = CLAMP (level, vumeter->level_min, vumeter->level_max);
if(vumeter->level > vumeter->peak_level) {
vumeter->peak_hold = vumeter->peak_hold_factor;
vumeter->peak_level = vumeter->level;
}
gtk_widget_queue_draw (GTK_WIDGET(vumeter));
}
}
/**
* gtk_vumeter_get_level:
* @param vumeter the vumeter widget
* @return the level shown (default: 0)
*
* Gets the level value of the vumeter.
*/
gint gtk_vumeter_get_level (GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return 0;
} else {
return vumeter->level;
}
}
/**
* gtk_vumeter_set_scaling:
* @param vumeter the vumeter widget
* @param scaling the scaling mode either GTK_VUMETER_SCALING_LINEAR or GTK_VUMETER_SCALING_LOG
*
* Sets the scaling mode of the VU Meter.
* It is either log or linear and defaults to linear.
* No matter which scale you set the input should always be linear, gtkVUMeter
* does the log calculation/display.
*/
void gtk_vumeter_set_scaling (GtkVUMeter *vumeter, GtkVUMeterScaling scaling)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
if (scaling != vumeter->scaling) {
vumeter->scaling = CLAMP (scaling, GTK_VUMETER_SCALING_LINEAR, GTK_VUMETER_SCALING_LOG);
#if GTK_CHECK_VERSION(2,20,0)
if (gtk_widget_get_realized (GTK_WIDGET(vumeter))) {
#else
if (GTK_WIDGET_REALIZED (vumeter)) {
#endif
gtk_vumeter_setup_colors (vumeter);
gtk_widget_queue_draw (GTK_WIDGET (vumeter));
}
}
}
/**
* gtk_vumeter_get_scaling:
* @param vumeter the vumeter widget
* @return the scaling mode either GTK_VUMETER_SCALING_LINEAR or GTK_VUMETER_SCALING_LOG
*
* Gets the scaling mode of the VU Meter.
* It is either log or linear and defaults to linear.
*/
GtkVUMeterScaling gtk_vumeter_get_scaling (GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return 0;
} else {
return vumeter->scaling;
}
}
/**
* gtk_vumeter_set_scale_items:
* @param vumeter the vumeter widget
* @param scale_items a GList of the pitch lines and labels (default:NULL)
*
* Set the scale pitch lines and labels.
* Must be NULL or a GList containing filled %GtkVUMeterScaleItem items.
* Function will make a deep copy of the GList and it's items,
* so the given GList and it's items can be safely thrown away after the call.
* A side effect: This also sets the minimum size of the widget.
*/
void gtk_vumeter_set_scale_items(GtkVUMeter *vumeter, GList *scale_items)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
gtk_vumeter_setup_scale_items(vumeter, scale_items);
#if GTK_CHECK_VERSION(2,20,0)
if (gtk_widget_get_realized(GTK_WIDGET(vumeter))) {
#else
if (GTK_WIDGET_REALIZED (vumeter)) {
#endif
gtk_widget_queue_draw (GTK_WIDGET (vumeter));
}
}
/**
* gtk_vumeter_get_scale_items:
* @param vumeter the vumeter widget
* @return a GList of the pitch lines and labels (default:NULL)
*
* Get the scale pitch lines and labels, a GList containing %GtkVUMeterScaleItem items.
* The returned GList must be freed with gtk_vumeter_free_scale_items() by the user!!!
*/
GList *gtk_vumeter_get_scale_items(GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return NULL;
} else {
return gtk_vumeter_clone_scale_items(vumeter->scale_items);
}
}
/**
* gtk_vumeter_set_scale_hole_size:
* @param vumeter the vumeter widget
* @param hole_size (default:0)
*
* Set the size of the "holes" between the pitch lines.
* A side effect: This also sets the minimum size of the widget.
*/
void gtk_vumeter_set_scale_hole_size (GtkVUMeter *vumeter, gint hole_size)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
if (vumeter->scale_pitch_holes != hole_size) {
vumeter->scale_pitch_holes = hole_size;
gtk_widget_queue_resize (GTK_WIDGET (vumeter));
}
}
/**
* gtk_vumeter_get_scale_hole_size:
* @param vumeter the vumeter widget
* @return (default:0)
*
* Get the size of the "holes" between the pitch lines.
*/
gint gtk_vumeter_get_scale_hole_size (GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return 0;
} else {
return vumeter->scale_pitch_holes;
}
}
/**
* gtk_vumeter_set_peak:
* @param vumeter the vumeter widget
* @param peak whether or not the peak indicator is drawn
* @param redraw_rate the rate (in milliseconds) at which the peak indicator is redrawn
*
* Enables/Disables the peak meachanism and sets the redraw timeout to redraw_rate milliseconds.
* The redraw operation is intelligent in that the widget is only redrawn
* if the peak_level != level and peak == %TRUE.
*
* Hint: A good redraw_rate is 200ms (default: 0ms -> off)
*/
void gtk_vumeter_set_peak (GtkVUMeter *vumeter, gboolean peak, guint redraw_rate)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
if (vumeter->peak != peak) {
vumeter->peak = peak;
gtk_widget_queue_draw (GTK_WIDGET (vumeter));
}
vumeter->peak_redraw_rate = redraw_rate;
if(vumeter->peak_timeout) {
g_source_remove(vumeter->peak_timeout);
}
if(redraw_rate != 0 && vumeter->peak) {
vumeter->peak_timeout = g_timeout_add (redraw_rate, gtk_vumeter_redraw_timeout, vumeter);
}
}
/**
* gtk_vumeter_get_peak:
* @param vumeter the vumeter widget
* @param peak whether or not the peak indicator is drawn
* @param redraw_rate the rate (in milliseconds) at which the peak indicator is redrawn
*
*/
void gtk_vumeter_get_peak (GtkVUMeter *vumeter, gboolean *peak, guint *redraw_rate)
{
if(!GTK_IS_VUMETER (vumeter)) {
*peak = 0;
*redraw_rate = 0;
} else {
*peak = vumeter->peak;
*redraw_rate = vumeter->peak_redraw_rate;
}
}
/**
* gtk_vumeter_set_peak_hold_factor:
* @param vumeter the vumeter widget
* @param hold_factor number of redraw_rates to wait until peak indicator is decayed (default:0 -> off)
*
* Holds the peak indicator for a limited time at it's highest position.
* The actual rate is dependent on the redraw_rate given to %gtk_vumeter_set_peak().
*
* Hint: For a VU meter, a good hold_factor is 7 with a redraw_rate of 200ms.
*/
void gtk_vumeter_set_peak_hold_factor (GtkVUMeter *vumeter, gint hold_factor)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
if (vumeter->peak_hold_factor != hold_factor) {
vumeter->peak_hold_factor = hold_factor;
}
}
/**
* gtk_vumeter_get_peak_hold_factor:
* @param vumeter the vumeter widget
* @return number of redraw_rates to wait until peak indicator is decayed (default:0 -> off)
*/
gint gtk_vumeter_get_peak_hold_factor (GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return 0;
} else {
return vumeter->peak_hold_factor;
}
}
/**
* gtk_vumeter_set_peak_falloff:
* @param vumeter the vumeter widget
* @param peak_falloff controls the speed to the peak decay
* @param user_rate pixels to reduce the peak level at each redraw_rate in GTK_VUMETER_PEAK_FALLOFF_USER mode, otherwise ignored
*
* Set the numbers of pixel reduced from the peak indicator each redraw_rate (after the hold period is over).
* The peak_falloff will be around: SLOW:5%, MEDIUM:10%, FAST:20%, USER:user_rate
* of the current range, reduced from peak at each redraw_rate (%gtk_vumeter_set_peak()).
*
* Hint: a user_rate of 0 can be used to hold the peak indicator at the highest position ever.
*/
void gtk_vumeter_set_peak_falloff (GtkVUMeter *vumeter, GtkVUMeterPeakFalloff peak_falloff, guint user_rate)
{
gint range;
g_return_if_fail (GTK_IS_VUMETER (vumeter));
vumeter->peak_falloff_mode = CLAMP(peak_falloff, GTK_VUMETER_PEAK_FALLOFF_SLOW, GTK_VUMETER_PEAK_FALLOFF_USER);
range = vumeter->level_max - vumeter->level_min;
switch (peak_falloff) {
case GTK_VUMETER_PEAK_FALLOFF_SLOW:
vumeter->peak_falloff_rate = range/20;
break;
default:
case GTK_VUMETER_PEAK_FALLOFF_MEDIUM:
vumeter->peak_falloff_rate = range/10;
break;
case GTK_VUMETER_PEAK_FALLOFF_FAST:
vumeter->peak_falloff_rate = range/5;
break;
case GTK_VUMETER_PEAK_FALLOFF_USER:
vumeter->peak_falloff_rate = (gint)user_rate;
break;
}
}
/**
* gtk_vumeter_get_peak_falloff:
* @param vumeter the vumeter widget
* @param peak_falloff controls the speed to the peak decay
* @param user_rate pixels to lower the peak level each redraw_rate (value valid in every peak_falloff mode)
*/
void gtk_vumeter_get_peak_falloff (GtkVUMeter *vumeter, GtkVUMeterPeakFalloff *peak_falloff, guint *user_rate)
{
if(!GTK_IS_VUMETER (vumeter)) {
*peak_falloff = 0;
*user_rate = 0;
} else {
*peak_falloff = vumeter->peak_falloff_mode;
*user_rate = vumeter->peak_falloff_rate;
}
}
/**
* gtk_vumeter_set_colors_inverted:
* @param vumeter the vumeter widget
* @param inverted whether or not the colors are inverted (default:%FALSE)
*
* Usually the graph will be colored with: 0:green, half:yellow, full:red.
* This is used to display signals that won't "work correct" above a maximum level
* (e.g. audio signals may distort if their amplitude is too high).
*
* The inverted colors will be: 0:red, half:yellow, full:green.
* This is used to display signals that need a minimum level to work correct
* (e.g. a received antenna signal must have a minimum amplitude to "work correct").
*/
void gtk_vumeter_set_colors_inverted (GtkVUMeter *vumeter, gboolean inverted)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
vumeter->colors_inverted = inverted;
#if GTK_CHECK_VERSION(2,20,0)
if (gtk_widget_get_realized(GTK_WIDGET(vumeter))) {
#else
if (GTK_WIDGET_REALIZED (vumeter)) {
#endif
gtk_vumeter_setup_colors (vumeter);
gtk_widget_queue_draw (GTK_WIDGET (vumeter));
}
}
/**
* gtk_vumeter_get_colors_inverted:
* @param vumeter the vumeter widget
* @return whether or not the colors are inverted (default:%FALSE)
*/
gboolean gtk_vumeter_get_colors_inverted (GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return 0;
} else {
return vumeter->colors_inverted;
}
}
/**
* gtk_vumeter_set_yellow_level:
* @param vumeter the vumeter widget
* @param yellow_level set the position of the yellow area (default:16383)
*
* Will be clamped between min and max.
*/
void gtk_vumeter_set_yellow_level (GtkVUMeter *vumeter, gint yellow_level)
{
g_return_if_fail (GTK_IS_VUMETER (vumeter));
vumeter->yellow_level = CLAMP (yellow_level, vumeter->level_min, vumeter->level_max);
#if GTK_CHECK_VERSION(2,20,0)
if (gtk_widget_get_realized(GTK_WIDGET(vumeter))) {
#else
if (GTK_WIDGET_REALIZED (vumeter)) {
#endif
gtk_vumeter_setup_colors (vumeter);
gtk_widget_queue_draw (GTK_WIDGET (vumeter));
}
}
/**
* gtk_vumeter_get_yellow_level:
* @param vumeter the vumeter widget
* @return get the position of the yellow area (default:16383)
*/
gint gtk_vumeter_get_yellow_level (GtkVUMeter *vumeter)
{
if(!GTK_IS_VUMETER (vumeter)) {
return 0;
} else {
return vumeter->yellow_level;
}
}
/**
* gtk_vumeter_set_brightness:
* @param vumeter the vumeter widget
* @param foreground set the brightness of the graphs foreground (default:65535)
* @param background set the brightness of the graphs background (default:49151)
*
* Hint: don't turn the brightness too low, otherwise you'll only see a black bar :-)
*/
void gtk_vumeter_set_brightness (GtkVUMeter *vumeter, gint foreground, gint background)
{
vumeter->f_brightness = CLAMP(foreground, 0, 65535);
vumeter->b_brightness = CLAMP(background, 0, vumeter->f_brightness);
#if GTK_CHECK_VERSION(2,20,0)
if (gtk_widget_get_realized(GTK_WIDGET(vumeter))) {
#else
if (GTK_WIDGET_REALIZED (vumeter)) {
#endif
gtk_vumeter_setup_colors (vumeter);
gtk_widget_queue_draw (GTK_WIDGET (vumeter));
}
}
/**
* gtk_vumeter_get_brightness:
* @param vumeter the vumeter widget
* @param foreground get the brightness of the graphs foreground (default:65535)
* @param background get the brightness of the graphs background (default:49151)
*/
void gtk_vumeter_get_brightness (GtkVUMeter *vumeter, gint *foreground, gint *background)
{
if(!GTK_IS_VUMETER (vumeter)) {
*foreground = 0;
*background = 0;
} else {
*foreground = vumeter->f_brightness;
*background = vumeter->b_brightness;
}
}
View Git Blame Copy Permalink