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PIKApp/app/widgets/pikameter.c

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/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikameter.c
* Copyright (C) 2017 Ell
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gegl.h>
#include <gtk/gtk.h>
#include "libpikabase/pikabase.h"
#include "libpikamath/pikamath.h"
#include "libpikacolor/pikacolor.h"
#include "libpikawidgets/pikawidgets.h"
#include "widgets-types.h"
#include "pikameter.h"
#define BORDER_WIDTH 1.0
#define REV (2.0 * G_PI)
#define SAMPLE(i) (meter->priv->samples + (i) * meter->priv->n_values)
#define SAMPLE_SIZE (meter->priv->n_values * sizeof (gdouble))
#define VALUE(i, j) ((SAFE_CLAMP (SAMPLE (i)[j], \
meter->priv->range_min, \
meter->priv->range_max) - \
meter->priv->range_min) / \
(meter->priv->range_max - meter->priv->range_min))
enum
{
PROP_0,
PROP_SIZE,
PROP_REFRESH_RATE,
PROP_RANGE_MIN,
PROP_RANGE_MAX,
PROP_N_VALUES,
PROP_HISTORY_VISIBLE,
PROP_HISTORY_DURATION,
PROP_HISTORY_RESOLUTION,
PROP_LED_ACTIVE,
PROP_LED_COLOR
};
typedef struct
{
gboolean active;
gboolean show_in_gauge;
gboolean show_in_history;
PikaRGB color;
PikaInterpolationType interpolation;
} Value;
struct _PikaMeterPrivate
{
GMutex mutex;
gint size;
gdouble refresh_rate;
gdouble range_min;
gdouble range_max;
gint n_values;
Value *values;
gboolean history_visible;
gdouble history_duration;
gdouble history_resolution;
gboolean led_active;
PikaRGB led_color;
gdouble *samples;
gint n_samples;
gint sample_duration;
gint64 last_sample_time;
gint64 current_time;
gdouble *uniform_sample;
gint timeout_id;
};
/* local function prototypes */
static void pika_meter_dispose (GObject *object);
static void pika_meter_finalize (GObject *object);
static void pika_meter_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void pika_meter_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void pika_meter_map (GtkWidget *widget);
static void pika_meter_unmap (GtkWidget *widget);
static void pika_meter_get_preferred_width (GtkWidget *widget,
gint *minimum_width,
gint *natural_width);
static void pika_meter_get_preferred_height (GtkWidget *widget,
gint *minimum_height,
gint *natural_height);
static gboolean pika_meter_draw (GtkWidget *widget,
cairo_t *cr);
static gboolean pika_meter_timeout (PikaMeter *meter);
static void pika_meter_clear_history_unlocked (PikaMeter *meter);
static void pika_meter_update_samples (PikaMeter *meter);
static void pika_meter_shift_samples (PikaMeter *meter);
static void pika_meter_mask_sample (PikaMeter *meter,
const gdouble *sample,
gdouble *result);
G_DEFINE_TYPE_WITH_PRIVATE (PikaMeter, pika_meter, GTK_TYPE_WIDGET)
#define parent_class pika_meter_parent_class
/* private functions */
static void
pika_meter_class_init (PikaMeterClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->dispose = pika_meter_dispose;
object_class->finalize = pika_meter_finalize;
object_class->get_property = pika_meter_get_property;
object_class->set_property = pika_meter_set_property;
widget_class->map = pika_meter_map;
widget_class->unmap = pika_meter_unmap;
widget_class->get_preferred_width = pika_meter_get_preferred_width;
widget_class->get_preferred_height = pika_meter_get_preferred_height;
widget_class->draw = pika_meter_draw;
g_object_class_install_property (object_class, PROP_SIZE,
g_param_spec_int ("size",
NULL, NULL,
32, 1024, 48,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_REFRESH_RATE,
g_param_spec_double ("refresh-rate",
NULL, NULL,
0.001, 1000.0, 8.0,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_RANGE_MIN,
g_param_spec_double ("range-min",
NULL, NULL,
0.0, G_MAXDOUBLE, 0.0,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_RANGE_MAX,
g_param_spec_double ("range-max",
NULL, NULL,
0.0, G_MAXDOUBLE, 1.0,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_N_VALUES,
g_param_spec_int ("n-values",
NULL, NULL,
0, 32, 0,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_HISTORY_VISIBLE,
g_param_spec_boolean ("history-visible",
NULL, NULL,
TRUE,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_HISTORY_DURATION,
g_param_spec_double ("history-duration",
NULL, NULL,
0.0, 3600.0, 60.0,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_HISTORY_RESOLUTION,
g_param_spec_double ("history-resolution",
NULL, NULL,
0.1, 3600.0, 1.0,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_LED_ACTIVE,
g_param_spec_boolean ("led-active",
NULL, NULL,
FALSE,
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
g_object_class_install_property (object_class, PROP_LED_COLOR,
pika_param_spec_rgb ("led-color",
NULL, NULL,
TRUE, &(PikaRGB) {},
PIKA_PARAM_READWRITE |
G_PARAM_CONSTRUCT));
}
static void
pika_meter_init (PikaMeter *meter)
{
meter->priv = pika_meter_get_instance_private (meter);
g_mutex_init (&meter->priv->mutex);
gtk_widget_set_has_window (GTK_WIDGET (meter), FALSE);
meter->priv->range_min = 0.0;
meter->priv->range_max = 1.0;
meter->priv->n_values = 0;
meter->priv->history_duration = 60.0;
meter->priv->history_resolution = 1.0;
pika_meter_update_samples (meter);
}
static void
pika_meter_dispose (GObject *object)
{
PikaMeter *meter = PIKA_METER (object);
g_clear_pointer (&meter->priv->values, g_free);
g_clear_pointer (&meter->priv->samples, g_free);
g_clear_pointer (&meter->priv->uniform_sample, g_free);
if (meter->priv->timeout_id)
{
g_source_remove (meter->priv->timeout_id);
meter->priv->timeout_id = 0;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
pika_meter_finalize (GObject *object)
{
PikaMeter *meter = PIKA_METER (object);
g_mutex_clear (&meter->priv->mutex);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
pika_meter_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
PikaMeter *meter = PIKA_METER (object);
switch (property_id)
{
case PROP_SIZE:
pika_meter_set_size (meter, g_value_get_int (value));
break;
case PROP_REFRESH_RATE:
pika_meter_set_refresh_rate (meter, g_value_get_double (value));
break;
case PROP_RANGE_MIN:
pika_meter_set_range (meter,
g_value_get_double (value),
pika_meter_get_range_max (meter));
break;
case PROP_RANGE_MAX:
pika_meter_set_range (meter,
pika_meter_get_range_min (meter),
g_value_get_double (value));
break;
case PROP_N_VALUES:
pika_meter_set_n_values (meter, g_value_get_int (value));
break;
case PROP_HISTORY_VISIBLE:
pika_meter_set_history_visible (meter, g_value_get_boolean (value));
break;
case PROP_HISTORY_DURATION:
pika_meter_set_history_duration (meter, g_value_get_double (value));
break;
case PROP_HISTORY_RESOLUTION:
pika_meter_set_history_resolution (meter, g_value_get_double (value));
break;
case PROP_LED_ACTIVE:
pika_meter_set_led_active (meter, g_value_get_boolean (value));
break;
case PROP_LED_COLOR:
pika_meter_set_led_color (meter, g_value_get_boxed (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_meter_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
PikaMeter *meter = PIKA_METER (object);
switch (property_id)
{
case PROP_SIZE:
g_value_set_int (value, pika_meter_get_size (meter));
break;
case PROP_REFRESH_RATE:
g_value_set_double (value, pika_meter_get_refresh_rate (meter));
break;
case PROP_RANGE_MIN:
g_value_set_double (value, pika_meter_get_range_min (meter));
break;
case PROP_RANGE_MAX:
g_value_set_double (value, pika_meter_get_range_max (meter));
break;
case PROP_N_VALUES:
g_value_set_int (value, pika_meter_get_n_values (meter));
break;
case PROP_HISTORY_VISIBLE:
g_value_set_boolean (value, pika_meter_get_history_visible (meter));
break;
case PROP_HISTORY_DURATION:
g_value_set_int (value, pika_meter_get_history_duration (meter));
break;
case PROP_HISTORY_RESOLUTION:
g_value_set_int (value, pika_meter_get_history_resolution (meter));
break;
case PROP_LED_ACTIVE:
g_value_set_boolean (value, pika_meter_get_led_active (meter));
break;
case PROP_LED_COLOR:
g_value_set_boxed (value, pika_meter_get_led_color (meter));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
pika_meter_map (GtkWidget *widget)
{
PikaMeter *meter = PIKA_METER (widget);
GTK_WIDGET_CLASS (parent_class)->map (widget);
if (! meter->priv->timeout_id)
{
gint interval = ROUND (1000.0 / meter->priv->refresh_rate);
meter->priv->timeout_id = g_timeout_add (interval,
(GSourceFunc) pika_meter_timeout,
meter);
}
}
static void
pika_meter_unmap (GtkWidget *widget)
{
PikaMeter *meter = PIKA_METER (widget);
if (meter->priv->timeout_id)
{
g_source_remove (meter->priv->timeout_id);
meter->priv->timeout_id = 0;
}
GTK_WIDGET_CLASS (parent_class)->unmap (widget);
}
static void
pika_meter_get_preferred_width (GtkWidget *widget,
gint *minimum_width,
gint *natural_width)
{
PikaMeter *meter = PIKA_METER (widget);
gint hsize = meter->priv->size;
if (meter->priv->history_visible)
hsize *= 3;
*minimum_width = *natural_width = ceil (hsize + 2.0 * BORDER_WIDTH);
}
static void
pika_meter_get_preferred_height (GtkWidget *widget,
gint *minimum_height,
gint *natural_height)
{
PikaMeter *meter = PIKA_METER (widget);
gint vsize = meter->priv->size;
*minimum_height = *natural_height = ceil (3.0 / 4.0 * vsize + 4.0 * BORDER_WIDTH);
}
static gboolean
pika_meter_draw (GtkWidget *widget,
cairo_t *cr)
{
PikaMeter *meter = PIKA_METER (widget);
GtkAllocation allocation;
gint size = meter->priv->size;
GtkStyleContext *style = gtk_widget_get_style_context (widget);
GtkStateFlags state = gtk_style_context_get_state (style);
GdkRGBA fg;
gint i;
gint j;
gint k;
g_mutex_lock (&meter->priv->mutex);
gtk_widget_get_allocation (widget, &allocation);
gtk_style_context_get_color (style, state, &fg);
/* translate to gauge center */
cairo_translate (cr,
0.5 * BORDER_WIDTH + 0.5 * size,
1.5 * BORDER_WIDTH + 2.0 / 3.0 * (allocation.height - 4.0 * BORDER_WIDTH));
cairo_save (cr);
/* paint led */
if (meter->priv->led_active)
{
cairo_arc (cr,
0.0, 0.0,
0.06 * size,
0.0 * REV, 1.0 * REV);
pika_cairo_set_source_rgba (cr, &meter->priv->led_color);
cairo_fill (cr);
}
/* clip to gauge interior */
cairo_arc (cr,
0.0, 0.0,
0.5 * size,
5.0 / 12.0 * REV, 1.0 / 12.0 * REV);
cairo_arc_negative (cr,
0.0, 0.0,
0.1 * size,
1.0 / 12.0 * REV, 5.0 / 12.0 * REV);
cairo_close_path (cr);
cairo_clip (cr);
/* paint gauge background */
gdk_cairo_set_source_rgba (cr, &fg);
cairo_paint_with_alpha (cr, 0.2);
/* paint values of last sample */
if (meter->priv->range_min < meter->priv->range_max)
{
for (i = 0; i < meter->priv->n_values; i++)
{
gdouble v = VALUE (0, i);
if (! meter->priv->values[i].active ||
! meter->priv->values[i].show_in_gauge)
{
continue;
}
pika_cairo_set_source_rgba (cr, &meter->priv->values[i].color);
cairo_move_to (cr, 0.0, 0.0);
cairo_arc (cr,
0.0, 0.0,
0.5 * size,
5.0 / 12.0 * REV, (5.0 / 12.0 + 2.0 / 3.0 * v) * REV);
cairo_line_to (cr, 0.0, 0.0);
cairo_close_path (cr);
cairo_fill (cr);
}
}
cairo_restore (cr);
/* paint gauge border */
gdk_cairo_set_source_rgba (cr, &fg);
cairo_set_line_width (cr, BORDER_WIDTH);
cairo_arc (cr,
0.0, 0.0,
0.5 * size,
5.0 / 12.0 * REV, 1.0 / 12.0 * REV);
cairo_arc_negative (cr,
0.0, 0.0,
0.1 * size,
1.0 / 12.0 * REV, 5.0 / 12.0 * REV);
cairo_close_path (cr);
cairo_stroke (cr);
/* history */
if (meter->priv->history_visible)
{
gdouble a1, a2;
gdouble history_x1, history_y1;
gdouble history_x2, history_y2;
cairo_save (cr);
a1 = +asin (0.25 / 0.6);
a2 = -asin (0.50 / 0.6);
/* clip to history interior */
cairo_arc_negative (cr,
0.0, 0.0,
0.6 * size,
a1, a2);
cairo_line_to (cr,
allocation.width - BORDER_WIDTH - 0.5 * size,
-0.50 * size);
cairo_line_to (cr,
allocation.width - BORDER_WIDTH - 0.5 * size,
0.25 * size);
cairo_close_path (cr);
cairo_path_extents (cr,
&history_x1, &history_y1,
&history_x2, &history_y2);
history_x1 = floor (history_x1);
history_y1 = floor (history_y1);
history_x2 = ceil (history_x2);
history_y2 = ceil (history_y2);
cairo_clip (cr);
/* paint history background */
gdk_cairo_set_source_rgba (cr, &fg);
cairo_paint_with_alpha (cr, 0.2);
/* history graph */
if (meter->priv->range_min < meter->priv->range_max)
{
gdouble sample_width = (history_x2 - history_x1) /
(meter->priv->n_samples - 4);
gdouble dx = 1.0 / sample_width;
cairo_save (cr);
/* translate to history bottom-right, and scale so that the
* x-axis points left, and has a length of one sample, and
* the y-axis points up, and has a length of the history
* window.
*/
cairo_translate (cr, history_x2, history_y2);
cairo_scale (cr, -sample_width, -(history_y2 - history_y1));
cairo_translate (cr,
(gdouble) (meter->priv->current_time -
meter->priv->last_sample_time *
meter->priv->sample_duration) /
meter->priv->sample_duration -
2.0,
0.0);
/* paint history graph for each value */
for (i = 0; i < meter->priv->n_values; i++)
{
gdouble y;
if (! meter->priv->values[i].active ||
! meter->priv->values[i].show_in_history)
{
continue;
}
pika_cairo_set_source_rgba (cr, &meter->priv->values[i].color);
cairo_move_to (cr, 0.0, 0.0);
switch (meter->priv->values[i].interpolation)
{
case PIKA_INTERPOLATION_NONE:
{
for (j = 1; j < meter->priv->n_samples - 2; j++)
{
gdouble y0 = VALUE (j - 1, i);
gdouble y1 = VALUE (j, i);
cairo_line_to (cr, j, y0);
cairo_line_to (cr, j, y1);
}
}
break;
case PIKA_INTERPOLATION_LINEAR:
{
for (j = 1; j < meter->priv->n_samples - 2; j++)
{
gdouble y = VALUE (j, i);
cairo_line_to (cr, j, y);
}
}
break;
case PIKA_INTERPOLATION_CUBIC:
default:
{
for (j = 1; j < meter->priv->n_samples - 2; j++)
{
gdouble y[4];
gdouble t[2];
gdouble c[4];
gdouble x;
for (k = 0; k < 4; k++)
y[k] = VALUE (j + k - 1, i);
for (k = 0; k < 2; k++)
{
t[k] = (y[k + 2] - y[k]) / 2.0;
t[k] = CLAMP (t[k], y[k + 1] - 1.0, y[k + 1]);
t[k] = CLAMP (t[k], -y[k + 1], 1.0 - y[k + 1]);
}
c[0] = y[1];
c[1] = t[0];
c[2] = 3 * (y[2] - y[1]) - 2 * t[0] - t[1];
c[3] = t[0] + t[1] - 2 * (y[2] - y[1]);
for (x = 0.0; x < 1.0; x += dx)
{
gdouble y = ((c[3] * x + c[2]) * x + c[1]) * x + c[0];
cairo_line_to (cr, j + x, y);
}
}
}
break;
}
y = VALUE (j, i);
cairo_line_to (cr, meter->priv->n_samples - 2, y);
cairo_line_to (cr, meter->priv->n_samples - 2, 0.0);
cairo_close_path (cr);
cairo_fill (cr);
}
cairo_restore (cr);
}
/* paint history grid */
cairo_set_antialias (cr, CAIRO_ANTIALIAS_NONE);
cairo_set_source_rgba (cr, fg.red, fg.green, fg.blue, 0.3);
for (i = 1; i < 4; i++)
{
cairo_move_to (cr,
history_x1,
history_y1 + i / 4.0 * (history_y2 - history_y1));
cairo_rel_line_to (cr, history_x2 - history_x1, 0.0);
cairo_stroke (cr);
}
for (i = 1; i < 6; i++)
{
cairo_move_to (cr,
history_x1 + i / 6.0 * (history_x2 - history_x1),
history_y1);
cairo_rel_line_to (cr, 0.0, history_y2 - history_y1);
cairo_stroke (cr);
}
cairo_restore (cr);
/* paint history border */
cairo_arc_negative (cr,
0.0, 0.0,
0.6 * size,
a1, a2);
cairo_line_to (cr,
allocation.width - BORDER_WIDTH - 0.5 * size,
-0.50 * size);
cairo_line_to (cr,
allocation.width - BORDER_WIDTH - 0.5 * size,
0.25 * size);
cairo_close_path (cr);
cairo_stroke (cr);
}
g_mutex_unlock (&meter->priv->mutex);
return FALSE;
}
static gboolean
pika_meter_timeout (PikaMeter *meter)
{
gboolean uniform = TRUE;
gboolean redraw = TRUE;
gdouble sample0[meter->priv->n_values];
gint i;
g_mutex_lock (&meter->priv->mutex);
pika_meter_shift_samples (meter);
pika_meter_mask_sample (meter, SAMPLE (0), sample0);
if (meter->priv->history_visible)
{
for (i = 1; uniform && i < meter->priv->n_samples; i++)
{
gdouble sample[meter->priv->n_values];
pika_meter_mask_sample (meter, SAMPLE (i), sample);
uniform = ! memcmp (sample0, sample, SAMPLE_SIZE);
}
}
if (uniform && meter->priv->uniform_sample)
redraw = memcmp (sample0, meter->priv->uniform_sample, SAMPLE_SIZE);
if (uniform)
{
if (! meter->priv->uniform_sample)
meter->priv->uniform_sample = g_malloc (SAMPLE_SIZE);
memcpy (meter->priv->uniform_sample, sample0, SAMPLE_SIZE);
}
else
{
g_clear_pointer (&meter->priv->uniform_sample, g_free);
}
g_mutex_unlock (&meter->priv->mutex);
if (redraw)
gtk_widget_queue_draw (GTK_WIDGET (meter));
return G_SOURCE_CONTINUE;
}
static void
pika_meter_clear_history_unlocked (PikaMeter *meter)
{
meter->priv->current_time = g_get_monotonic_time ();
meter->priv->last_sample_time = meter->priv->current_time /
meter->priv->sample_duration;
memset (meter->priv->samples, 0, meter->priv->n_samples * SAMPLE_SIZE);
g_clear_pointer (&meter->priv->uniform_sample, g_free);
}
static void
pika_meter_update_samples (PikaMeter *meter)
{
meter->priv->n_samples = ceil (meter->priv->history_duration /
meter->priv->history_resolution) + 4;
meter->priv->samples = g_renew (gdouble, meter->priv->samples,
meter->priv->n_samples *
meter->priv->n_values);
meter->priv->sample_duration = ROUND (meter->priv->history_resolution *
G_TIME_SPAN_SECOND);
pika_meter_clear_history_unlocked (meter);
}
static void
pika_meter_shift_samples (PikaMeter *meter)
{
gint64 time;
gint n_new_samples;
meter->priv->current_time = g_get_monotonic_time ();
time = meter->priv->current_time / meter->priv->sample_duration;
n_new_samples = MIN (time - meter->priv->last_sample_time,
meter->priv->n_samples - 1);
memmove (SAMPLE (n_new_samples), SAMPLE (0),
(meter->priv->n_samples - n_new_samples) * SAMPLE_SIZE);
gegl_memset_pattern (SAMPLE (0), SAMPLE (n_new_samples), SAMPLE_SIZE,
n_new_samples);
meter->priv->last_sample_time = time;
}
static void
pika_meter_mask_sample (PikaMeter *meter,
const gdouble *sample,
gdouble *result)
{
gint i;
for (i = 0; i < meter->priv->n_values; i++)
{
if (meter->priv->values[i].active &&
(meter->priv->values[i].show_in_gauge ||
meter->priv->values[i].show_in_history))
{
result[i] = sample[i];
}
else
{
result[i] = 0.0;
}
}
}
/* public functions */
GtkWidget *
pika_meter_new (gint n_values)
{
return g_object_new (PIKA_TYPE_METER,
"n-values", n_values,
NULL);
}
void
pika_meter_set_size (PikaMeter *meter,
gint size)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (size > 0);
if (size != meter->priv->size)
{
meter->priv->size = size;
gtk_widget_queue_resize (GTK_WIDGET (meter));
g_object_notify (G_OBJECT (meter), "size");
}
}
gint
pika_meter_get_size (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), 0);
return meter->priv->size;
}
void
pika_meter_set_refresh_rate (PikaMeter *meter,
gdouble rate)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (rate > 0.0);
if (rate != meter->priv->refresh_rate)
{
meter->priv->refresh_rate = rate;
if (meter->priv->timeout_id)
{
gint interval = ROUND (1000.0 / meter->priv->refresh_rate);
g_source_remove (meter->priv->timeout_id);
meter->priv->timeout_id = g_timeout_add (interval,
(GSourceFunc) pika_meter_timeout,
meter);
}
g_object_notify (G_OBJECT (meter), "refresh-rate");
}
}
gdouble
pika_meter_get_refresh_rate (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), 0);
return meter->priv->refresh_rate;
}
void
pika_meter_set_range (PikaMeter *meter,
gdouble min,
gdouble max)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (min <= max);
if (min != meter->priv->range_min)
{
g_mutex_lock (&meter->priv->mutex);
meter->priv->range_min = min;
g_mutex_unlock (&meter->priv->mutex);
gtk_widget_queue_draw (GTK_WIDGET (meter));
g_object_notify (G_OBJECT (meter), "range-min");
}
if (max != meter->priv->range_max)
{
g_mutex_lock (&meter->priv->mutex);
meter->priv->range_max = max;
g_mutex_unlock (&meter->priv->mutex);
gtk_widget_queue_draw (GTK_WIDGET (meter));
g_object_notify (G_OBJECT (meter), "range-max");
}
}
gdouble
pika_meter_get_range_min (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), 0.0);
return meter->priv->range_min;
}
gdouble
pika_meter_get_range_max (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), 0.0);
return meter->priv->range_max;
}
void
pika_meter_set_n_values (PikaMeter *meter,
gint n_values)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (n_values >= 0);
if (n_values != meter->priv->n_values)
{
g_mutex_lock (&meter->priv->mutex);
meter->priv->values = g_renew (Value, meter->priv->values, n_values);
if (n_values > meter->priv->n_values)
{
gegl_memset_pattern (meter->priv->values,
&(Value) { .active = TRUE,
.show_in_gauge = TRUE,
.show_in_history = TRUE,
.interpolation = PIKA_INTERPOLATION_CUBIC},
sizeof (Value),
n_values - meter->priv->n_values);
}
meter->priv->n_values = n_values;
pika_meter_update_samples (meter);
g_mutex_unlock (&meter->priv->mutex);
gtk_widget_queue_draw (GTK_WIDGET (meter));
g_object_notify (G_OBJECT (meter), "n-values");
}
}
gint
pika_meter_get_n_values (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), 0);
return meter->priv->n_values;
}
void
pika_meter_set_value_active (PikaMeter *meter,
gint value,
gboolean active)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (value >= 0 && value < meter->priv->n_values);
if (active != meter->priv->values[value].active)
{
meter->priv->values[value].active = active;
gtk_widget_queue_draw (GTK_WIDGET (meter));
}
}
gboolean
pika_meter_get_value_active (PikaMeter *meter,
gint value)
{
g_return_val_if_fail (PIKA_IS_METER (meter), FALSE);
g_return_val_if_fail (value >= 0 && value < meter->priv->n_values, FALSE);
return meter->priv->values[value].active;
}
void
pika_meter_set_value_color (PikaMeter *meter,
gint value,
const PikaRGB *color)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (value >= 0 && value < meter->priv->n_values);
g_return_if_fail (color != NULL);
if (memcmp (color, &meter->priv->values[value].color, sizeof (PikaRGB)))
{
meter->priv->values[value].color = *color;
gtk_widget_queue_draw (GTK_WIDGET (meter));
}
}
const PikaRGB *
pika_meter_get_value_color (PikaMeter *meter,
gint value)
{
g_return_val_if_fail (PIKA_IS_METER (meter), NULL);
g_return_val_if_fail (value >= 0 && value < meter->priv->n_values, NULL);
return &meter->priv->values[value].color;
}
void
pika_meter_set_value_interpolation (PikaMeter *meter,
gint value,
PikaInterpolationType interpolation)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (value >= 0 && value < meter->priv->n_values);
if (meter->priv->values[value].interpolation != interpolation)
{
meter->priv->values[value].interpolation = interpolation;
gtk_widget_queue_draw (GTK_WIDGET (meter));
}
}
PikaInterpolationType
pika_meter_get_value_interpolation (PikaMeter *meter,
gint value)
{
g_return_val_if_fail (PIKA_IS_METER (meter), PIKA_INTERPOLATION_NONE);
g_return_val_if_fail (value >= 0 && value < meter->priv->n_values,
PIKA_INTERPOLATION_NONE);
return meter->priv->values[value].interpolation;
}
void
pika_meter_set_value_show_in_gauge (PikaMeter *meter,
gint value,
gboolean show)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (value >= 0 && value < meter->priv->n_values);
if (meter->priv->values[value].show_in_gauge != show)
{
meter->priv->values[value].show_in_gauge = show;
gtk_widget_queue_draw (GTK_WIDGET (meter));
}
}
gboolean
pika_meter_get_value_show_in_gauge (PikaMeter *meter,
gint value)
{
g_return_val_if_fail (PIKA_IS_METER (meter), FALSE);
g_return_val_if_fail (value >= 0 && value < meter->priv->n_values, FALSE);
return meter->priv->values[value].show_in_gauge;
}
void
pika_meter_set_value_show_in_history (PikaMeter *meter,
gint value,
gboolean show)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (value >= 0 && value < meter->priv->n_values);
if (meter->priv->values[value].show_in_history != show)
{
meter->priv->values[value].show_in_history = show;
gtk_widget_queue_draw (GTK_WIDGET (meter));
}
}
gboolean
pika_meter_get_value_show_in_history (PikaMeter *meter,
gint value)
{
g_return_val_if_fail (PIKA_IS_METER (meter), FALSE);
g_return_val_if_fail (value >= 0 && value < meter->priv->n_values, FALSE);
return meter->priv->values[value].show_in_history;
}
void
pika_meter_set_history_visible (PikaMeter *meter,
gboolean visible)
{
g_return_if_fail (PIKA_IS_METER (meter));
if (visible != meter->priv->history_visible)
{
meter->priv->history_visible = visible;
gtk_widget_queue_resize (GTK_WIDGET (meter));
g_object_notify (G_OBJECT (meter), "history-visible");
}
}
gboolean
pika_meter_get_history_visible (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), FALSE);
return meter->priv->history_visible;
}
void
pika_meter_set_history_duration (PikaMeter *meter,
gdouble duration)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (duration >= 0.0);
if (duration != meter->priv->history_duration)
{
g_mutex_lock (&meter->priv->mutex);
meter->priv->history_duration = duration;
pika_meter_update_samples (meter);
g_mutex_unlock (&meter->priv->mutex);
g_object_notify (G_OBJECT (meter), "history-duration");
}
}
gdouble
pika_meter_get_history_duration (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), 0.0);
return meter->priv->history_duration;
}
void
pika_meter_set_history_resolution (PikaMeter *meter,
gdouble resolution)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (resolution > 0.0);
if (resolution != meter->priv->history_resolution)
{
g_mutex_lock (&meter->priv->mutex);
meter->priv->history_resolution = resolution;
pika_meter_update_samples (meter);
g_mutex_unlock (&meter->priv->mutex);
g_object_notify (G_OBJECT (meter), "history-resolution");
}
}
gdouble
pika_meter_get_history_resolution (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), 0.0);
return meter->priv->history_resolution;
}
void
pika_meter_clear_history (PikaMeter *meter)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_mutex_lock (&meter->priv->mutex);
pika_meter_clear_history_unlocked (meter);
g_mutex_unlock (&meter->priv->mutex);
gtk_widget_queue_draw (GTK_WIDGET (meter));
}
void
pika_meter_add_sample (PikaMeter *meter,
const gdouble *sample)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (sample != NULL || meter->priv->n_values == 0);
g_mutex_lock (&meter->priv->mutex);
pika_meter_shift_samples (meter);
memcpy (SAMPLE (0), sample, SAMPLE_SIZE);
g_mutex_unlock (&meter->priv->mutex);
}
void
pika_meter_set_led_active (PikaMeter *meter,
gboolean active)
{
g_return_if_fail (PIKA_IS_METER (meter));
if (active != meter->priv->led_active)
{
meter->priv->led_active = active;
gtk_widget_queue_draw (GTK_WIDGET (meter));
g_object_notify (G_OBJECT (meter), "led-active");
}
}
gboolean
pika_meter_get_led_active (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), FALSE);
return meter->priv->led_active;
}
void
pika_meter_set_led_color (PikaMeter *meter,
const PikaRGB *color)
{
g_return_if_fail (PIKA_IS_METER (meter));
g_return_if_fail (color != NULL);
if (memcmp (color, &meter->priv->led_color, sizeof (PikaRGB)))
{
meter->priv->led_color = *color;
if (meter->priv->led_active)
gtk_widget_queue_draw (GTK_WIDGET (meter));
g_object_notify (G_OBJECT (meter), "led-color");
}
}
const PikaRGB *
pika_meter_get_led_color (PikaMeter *meter)
{
g_return_val_if_fail (PIKA_IS_METER (meter), NULL);
return &meter->priv->led_color;
}
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