summaryrefslogtreecommitdiffstats
path: root/tools/gui/egg-histogram-view.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/gui/egg-histogram-view.c')
-rw-r--r--tools/gui/egg-histogram-view.c234
1 files changed, 177 insertions, 57 deletions
diff --git a/tools/gui/egg-histogram-view.c b/tools/gui/egg-histogram-view.c
index 7abc2be..91e61e8 100644
--- a/tools/gui/egg-histogram-view.c
+++ b/tools/gui/egg-histogram-view.c
@@ -34,11 +34,14 @@ struct _EggHistogramViewPrivate
/* This could be moved into a real histogram class */
guint n_bins;
gint *bins;
- gint min_value;
- gint max_value;
- gint min_border;
+ gint *grabbed;
+ gint min_border; /* threshold set in screen units */
gint max_border;
+ gdouble min_value; /* lowest value of the first bin */
+ gdouble max_value; /* highest value of the last bin */
+ gdouble range;
+
gpointer data;
gint n_elements;
gint n_bits;
@@ -47,6 +50,8 @@ struct _EggHistogramViewPrivate
enum
{
PROP_0,
+ PROP_MINIMUM_BIN_VALUE,
+ PROP_MAXIMUM_BIN_VALUE,
N_PROPERTIES
};
@@ -71,6 +76,7 @@ egg_histogram_view_set_data (EggHistogramView *view,
{
EggHistogramViewPrivate *priv;
+ g_return_if_fail (EGG_IS_HISTOGRAM_VIEW (view));
priv = view->priv;
if (priv->bins != NULL)
@@ -82,16 +88,46 @@ egg_histogram_view_set_data (EggHistogramView *view,
priv->n_bits = n_bits;
priv->n_elements = n_elements;
- priv->min_value = 0;
+ priv->min_value = 0.0;
priv->max_value = (gint) pow(2, n_bits) - 1;
- priv->min_border = 20;
- priv->max_border = priv->max_value - 20;
+ priv->min_border = 0;
+ priv->max_border = 256;
+ priv->range = priv->max_value - priv->min_value;
+}
+
+void
+egg_histogram_get_visible_range (EggHistogramView *view, gdouble *min, gdouble *max)
+{
+ EggHistogramViewPrivate *priv;
+ GtkAllocation allocation;
+ gdouble width;
+
+ g_return_if_fail (EGG_IS_HISTOGRAM_VIEW (view));
+
+ gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
+ width = (gdouble) allocation.width - 2 * BORDER;
+ priv = view->priv;
+
+ *min = (priv->min_border - 2) / width * priv->range;
+ *max = (priv->max_border - 2) / width * priv->range;
+}
+
+static void
+set_max_border (EggHistogramView *view)
+{
+ GtkAllocation allocation;
+
+ g_return_if_fail (EGG_IS_HISTOGRAM_VIEW (view));
+ gtk_widget_get_allocation (GTK_WIDGET (view), &allocation);
+ view->priv->max_border = allocation.width - 2 * BORDER;
}
static void
compute_histogram (EggHistogramViewPrivate *priv)
{
+ guint n_bins = priv->n_bins - 1;
+
for (guint i = 0; i < priv->n_bins; i++)
priv->bins[i] = 0;
@@ -100,8 +136,11 @@ compute_histogram (EggHistogramViewPrivate *priv)
for (guint i = 0; i < priv->n_elements; i++) {
guint8 v = data[i];
- guint index = (guint) round (((gdouble) v) / priv->max_value * (priv->n_bins - 1));
- priv->bins[index]++;
+
+ if (v >= priv->min_value && v <= priv->max_value) {
+ guint index = (guint) round (((gdouble) v) / priv->max_value * n_bins);
+ priv->bins[index]++;
+ }
}
}
else if (priv->n_bits == 16) {
@@ -109,8 +148,11 @@ compute_histogram (EggHistogramViewPrivate *priv)
for (guint i = 0; i < priv->n_elements; i++) {
guint16 v = data[i];
- guint index = (guint) floor (((gdouble ) v) / priv->max_value * (priv->n_bins - 1));
- priv->bins[index]++;
+
+ if (v >= priv->min_value && v <= priv->max_value) {
+ guint index = (guint) floor (((gdouble ) v) / priv->max_value * n_bins);
+ priv->bins[index]++;
+ }
}
}
else
@@ -137,6 +179,36 @@ egg_histogram_view_size_request (GtkWidget *widget,
requisition->height = MIN_HEIGHT;
}
+static void
+draw_bins (EggHistogramViewPrivate *priv,
+ cairo_t *cr,
+ gint width,
+ gint height)
+{
+ gdouble skip = ((gdouble) width) / priv->n_bins;
+ gdouble x = BORDER;
+ gdouble ys = height + BORDER - 1;
+ gint max_value = 0;
+
+ for (guint i = 0; i < priv->n_bins; i++) {
+ if (priv->bins[i] > max_value)
+ max_value = priv->bins[i];
+ }
+
+ if (max_value == 0)
+ return;
+
+ for (guint i = 0; i < priv->n_bins && x < (width - BORDER); i++, x += skip) {
+ if (priv->bins[i] == 0)
+ continue;
+
+ gint y = (gint) ((height - 2) * priv->bins[i]) / max_value;
+ cairo_move_to (cr, round (x), ys);
+ cairo_line_to (cr, round (x), ys - y);
+ cairo_stroke (cr);
+ }
+}
+
static gboolean
egg_histogram_view_expose (GtkWidget *widget,
GdkEventExpose *event)
@@ -146,7 +218,6 @@ egg_histogram_view_expose (GtkWidget *widget,
GtkStyle *style;
cairo_t *cr;
gint width, height;
- gint max_value = 0;
priv = EGG_HISTOGRAM_VIEW_GET_PRIVATE (widget);
cr = gdk_cairo_create (gtk_widget_get_window (widget));
@@ -181,36 +252,15 @@ egg_histogram_view_expose (GtkWidget *widget,
/* Draw border areas */
gdk_cairo_set_source_color (cr, &style->dark[GTK_STATE_NORMAL]);
- if (priv->min_border > 0) {
- cairo_rectangle (cr, BORDER, BORDER, priv->min_border + 0.5, height - 1);
- cairo_fill (cr);
- }
-
- /* Draw spikes */
- for (guint i = 0; i < priv->n_bins; i++) {
- if (priv->bins[i] > max_value)
- max_value = priv->bins[i];
- }
+ cairo_rectangle (cr, BORDER, BORDER, priv->min_border + 0.5, height - 1);
+ cairo_fill (cr);
- if (max_value == 0)
- goto cleanup;
+ cairo_rectangle (cr, priv->max_border + 0.5, BORDER, width - priv->min_border - 0.5, height - 1);
+ cairo_fill (cr);
+ /* Draw spikes */
gdk_cairo_set_source_color (cr, &style->black);
-
- if (width > priv->n_bins) {
- gdouble skip = ((gdouble) width) / priv->n_bins;
- gdouble x = 1;
-
- for (guint i = 0; i < priv->n_bins; i++, x += skip) {
- if (priv->bins[i] == 0)
- continue;
-
- gint y = (gint) ((height - 2) * priv->bins[i]) / max_value;
- cairo_move_to (cr, round (x + BORDER), height + BORDER - 1);
- cairo_line_to (cr, round (x + BORDER), height + BORDER - 1 - y);
- cairo_stroke (cr);
- }
- }
+ draw_bins (priv, cr, width, height);
cleanup:
cairo_destroy (cr);
@@ -242,9 +292,42 @@ egg_histogram_view_set_property (GObject *object,
const GValue *value,
GParamSpec *pspec)
{
+ EggHistogramViewPrivate *priv;
+
g_return_if_fail (EGG_IS_HISTOGRAM_VIEW (object));
+ priv = EGG_HISTOGRAM_VIEW_GET_PRIVATE (object);
switch (property_id) {
+ case PROP_MINIMUM_BIN_VALUE:
+ {
+ gdouble v = g_value_get_double (value);
+
+ if (v > priv->max_value)
+ g_warning ("Minimum value `%f' larger than maximum value `%f'",
+ v, priv->max_value);
+ else {
+ priv->min_value = v;
+ priv->range = priv->max_value - v;
+ priv->min_border = 0;
+ }
+ }
+ break;
+
+ case PROP_MAXIMUM_BIN_VALUE:
+ {
+ gdouble v = g_value_get_double (value);
+
+ if (v < priv->min_value)
+ g_warning ("Maximum value `%f' larger than minimum value `%f'",
+ v, priv->min_value);
+ else {
+ priv->max_value = v;
+ priv->range = v - priv->min_value;
+ set_max_border (EGG_HISTOGRAM_VIEW (object));
+ }
+ }
+ break;
+
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
return;
@@ -257,20 +340,48 @@ egg_histogram_view_get_property (GObject *object,
GValue *value,
GParamSpec *pspec)
{
+ EggHistogramViewPrivate *priv;
+
g_return_if_fail (EGG_IS_HISTOGRAM_VIEW (object));
+ priv = EGG_HISTOGRAM_VIEW_GET_PRIVATE (object);
switch (property_id) {
+ case PROP_MINIMUM_BIN_VALUE:
+ g_value_set_double (value, priv->min_value);
+ break;
+
+ case PROP_MAXIMUM_BIN_VALUE:
+ g_value_set_double (value, priv->max_value);
+ break;
+
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
return;
}
}
-static gint
-get_mouse_distance (EggHistogramViewPrivate *priv,
+static gboolean
+is_on_border (EggHistogramViewPrivate *priv,
+ gint x)
+{
+ gint d1 = (priv->min_border + BORDER) - x;
+ gint d2 = (priv->max_border + BORDER) - x;
+ return ABS (d1) < 6 || ABS (d2) < 6;
+}
+
+static gint *
+get_grabbed_border (EggHistogramViewPrivate *priv,
gint x)
{
- return (priv->min_border + BORDER) - x;
+ gint d1 = (priv->min_border + BORDER) - x;
+ gint d2 = (priv->max_border + BORDER) - x;
+
+ if (ABS (d1) < 6)
+ return &priv->min_border;
+ else if (ABS (d2) < 6)
+ return &priv->max_border;
+
+ return NULL;
}
static gboolean
@@ -284,13 +395,12 @@ egg_histogram_view_motion_notify (GtkWidget *widget,
priv = view->priv;
if (priv->grabbing) {
- priv->min_border = event->x + BORDER;
+ *priv->grabbed = event->x;
+
gtk_widget_queue_draw (widget);
}
else {
- gint distance = get_mouse_distance (priv, event->x);
-
- if (ABS(distance) < 6)
+ if (is_on_border (priv, event->x))
set_cursor_type (view, GDK_FLEUR);
else
set_cursor_type (view, GDK_ARROW);
@@ -304,18 +414,10 @@ egg_histogram_view_button_release (GtkWidget *widget,
GdkEventButton *event)
{
EggHistogramView *view;
- EggHistogramViewPrivate *priv;
- /* GtkAllocation allocation; */
- /* gint width; */
-
- /* gtk_widget_get_allocation (widget, &allocation); */
- /* width = allocation.width - 2 * BORDER; */
view = EGG_HISTOGRAM_VIEW (widget);
- priv = view->priv;
-
set_cursor_type (view, GDK_ARROW);
- priv->grabbing = FALSE;
+ view->priv->grabbing = FALSE;
return TRUE;
}
@@ -326,14 +428,13 @@ egg_histogram_view_button_press (GtkWidget *widget,
{
EggHistogramView *view;
EggHistogramViewPrivate *priv;
- gint distance;
view = EGG_HISTOGRAM_VIEW (widget);
priv = view->priv;
- distance = get_mouse_distance (priv, event->x);
- if (ABS (distance) < 6) {
+ if (is_on_border (priv, event->x)) {
priv->grabbing = TRUE;
+ priv->grabbed = get_grabbed_border (priv, event->x);
set_cursor_type (view, GDK_FLEUR);
}
@@ -357,6 +458,23 @@ egg_histogram_view_class_init (EggHistogramViewClass *klass)
widget_class->button_release_event = egg_histogram_view_button_release;
widget_class->motion_notify_event = egg_histogram_view_motion_notify;
+ egg_histogram_view_properties[PROP_MINIMUM_BIN_VALUE] =
+ g_param_spec_double ("minimum-bin-value",
+ "Smallest possible bin value",
+ "Smallest possible bin value, everything below is discarded.",
+ 0.0, G_MAXDOUBLE, 0.0,
+ G_PARAM_READWRITE);
+
+ egg_histogram_view_properties[PROP_MAXIMUM_BIN_VALUE] =
+ g_param_spec_double ("maximum-bin-value",
+ "Largest possible bin value",
+ "Largest possible bin value, everything above is discarded.",
+ 0.0, G_MAXDOUBLE, 256.0,
+ G_PARAM_READWRITE);
+
+ g_object_class_install_property (object_class, PROP_MINIMUM_BIN_VALUE, egg_histogram_view_properties[PROP_MINIMUM_BIN_VALUE]);
+ g_object_class_install_property (object_class, PROP_MAXIMUM_BIN_VALUE, egg_histogram_view_properties[PROP_MAXIMUM_BIN_VALUE]);
+
g_type_class_add_private (klass, sizeof (EggHistogramViewPrivate));
}
@@ -371,6 +489,8 @@ egg_histogram_view_init (EggHistogramView *view)
priv->data = NULL;
priv->n_bins = 0;
priv->n_elements = 0;
+ priv->min_value = priv->min_border = 0;
+ priv->max_value = priv->max_border = 256;
priv->cursor_type = GDK_ARROW;
priv->grabbing = FALSE;