diff options
Diffstat (limited to 'tools/gui/egg-histogram-view.c')
| -rw-r--r-- | tools/gui/egg-histogram-view.c | 524 |
1 files changed, 0 insertions, 524 deletions
diff --git a/tools/gui/egg-histogram-view.c b/tools/gui/egg-histogram-view.c deleted file mode 100644 index 812af7a..0000000 --- a/tools/gui/egg-histogram-view.c +++ /dev/null @@ -1,524 +0,0 @@ -/* Copyright (C) 2011, 2012 Matthias Vogelgesang <matthias.vogelgesang@kit.edu> - (Karlsruhe Institute of Technology) - - This library is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by the - Free Software Foundation; either version 2.1 of the License, or (at your - option) any later version. - - This library 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 Lesser General Public License for more - details. - - You should have received a copy of the GNU Lesser General Public License along - with this library; if not, write to the Free Software Foundation, Inc., 51 - Franklin St, Fifth Floor, Boston, MA 02110, USA */ - -#include <math.h> -#include "egg-histogram-view.h" - -G_DEFINE_TYPE (EggHistogramView, egg_histogram_view, GTK_TYPE_DRAWING_AREA) - -#define EGG_HISTOGRAM_VIEW_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE((obj), EGG_TYPE_HISTOGRAM_VIEW, EggHistogramViewPrivate)) - -#define MIN_WIDTH 128 -#define MIN_HEIGHT 128 -#define BORDER 2 - -struct _EggHistogramViewPrivate -{ - GdkCursorType cursor_type; - gboolean grabbing; - - /* This could be moved into a real histogram class */ - guint n_bins; - gint *bins; - 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; -}; - -enum -{ - PROP_0, - PROP_MINIMUM_BIN_VALUE, - PROP_MAXIMUM_BIN_VALUE, - N_PROPERTIES -}; - -enum -{ - CHANGED, - LAST_SIGNAL -}; - -static GParamSpec *egg_histogram_view_properties[N_PROPERTIES] = { NULL, }; - -static guint egg_histogram_view_signals[LAST_SIGNAL] = { 0 }; - - -GtkWidget * -egg_histogram_view_new (void) -{ - EggHistogramView *view; - - view = EGG_HISTOGRAM_VIEW (g_object_new (EGG_TYPE_HISTOGRAM_VIEW, NULL)); - return GTK_WIDGET (view); -} - -void -egg_histogram_view_set_data (EggHistogramView *view, - gpointer data, - guint n_elements, - guint n_bits, - guint n_bins) -{ - EggHistogramViewPrivate *priv; - - g_return_if_fail (EGG_IS_HISTOGRAM_VIEW (view)); - priv = view->priv; - - if (priv->bins != NULL) - g_free (priv->bins); - - priv->data = data; - priv->bins = g_malloc0 (n_bins * sizeof (guint)); - priv->n_bins = n_bins; - priv->n_bits = n_bits; - priv->n_elements = n_elements; - - priv->min_value = 0.0; - priv->max_value = (gint) pow(2, n_bits) - 1; - - 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; - - if (priv->n_bits == 8) { - guint8 *data = (guint8 *) priv->data; - - for (guint i = 0; i < priv->n_elements; i++) { - guint8 v = data[i]; - - if (v >= priv->min_value && v <= priv->max_value) { - guint index = (guint) round (((gdouble) v) / priv->max_value * n_bins); - priv->bins[index]++; - } - } - } - else { - guint16 *data = (guint16 *) priv->data; - - for (guint i = 0; i < priv->n_elements; i++) { - guint16 v = data[i]; - - if (v >= priv->min_value && v <= priv->max_value) { - guint index = (guint) floor (((gdouble ) v) / priv->max_value * n_bins); - priv->bins[index]++; - } - } - } -} - -static void -set_cursor_type (EggHistogramView *view, GdkCursorType cursor_type) -{ - if (cursor_type != view->priv->cursor_type) { - GdkCursor *cursor = gdk_cursor_new (cursor_type); - - gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET(view)), cursor); - gdk_cursor_unref (cursor); - view->priv->cursor_type = cursor_type; - } -} - -static void -egg_histogram_view_size_request (GtkWidget *widget, - GtkRequisition *requisition) -{ - requisition->width = MIN_WIDTH; - 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) -{ - EggHistogramViewPrivate *priv; - GtkAllocation allocation; - GtkStyle *style; - cairo_t *cr; - gint width, height; - - priv = EGG_HISTOGRAM_VIEW_GET_PRIVATE (widget); - cr = gdk_cairo_create (gtk_widget_get_window (widget)); - - gdk_cairo_region (cr, event->region); - cairo_clip (cr); - - style = gtk_widget_get_style (widget); - gdk_cairo_set_source_color (cr, &style->base[GTK_STATE_NORMAL]); - cairo_paint (cr); - - /* Draw the background */ - gdk_cairo_set_source_color (cr, &style->base[GTK_STATE_NORMAL]); - cairo_paint (cr); - - gtk_widget_get_allocation (widget, &allocation); - width = allocation.width - 2 * BORDER; - height = allocation.height - 2 * BORDER; - - gdk_cairo_set_source_color (cr, &style->dark[GTK_STATE_NORMAL]); - cairo_set_line_width (cr, 1.0); - cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE); - cairo_translate (cr, 0.5, 0.5); - cairo_rectangle (cr, BORDER, BORDER, width - 1, height - 1); - cairo_stroke (cr); - - if (priv->bins == NULL) - goto cleanup; - - compute_histogram (priv); - - /* Draw border areas */ - gdk_cairo_set_source_color (cr, &style->dark[GTK_STATE_NORMAL]); - - cairo_rectangle (cr, BORDER, BORDER, priv->min_border + 0.5, height - 1); - cairo_fill (cr); - - cairo_rectangle (cr, priv->max_border + 0.5, BORDER, width - priv->max_border + 0.5, height - 1); - cairo_fill (cr); - - /* Draw spikes */ - gdk_cairo_set_source_color (cr, &style->black); - draw_bins (priv, cr, width, height); - -cleanup: - cairo_destroy (cr); - return FALSE; -} - -static void -egg_histogram_view_finalize (GObject *object) -{ - EggHistogramViewPrivate *priv; - - priv = EGG_HISTOGRAM_VIEW_GET_PRIVATE (object); - - if (priv->bins) - g_free (priv->bins); - - G_OBJECT_CLASS (egg_histogram_view_parent_class)->finalize (object); -} - -static void -egg_histogram_view_dispose (GObject *object) -{ - G_OBJECT_CLASS (egg_histogram_view_parent_class)->dispose (object); -} - -static void -egg_histogram_view_set_property (GObject *object, - guint property_id, - 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; - } -} - -static void -egg_histogram_view_get_property (GObject *object, - guint property_id, - 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 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) -{ - 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 -egg_histogram_view_motion_notify (GtkWidget *widget, - GdkEventMotion *event) -{ - EggHistogramView *view; - EggHistogramViewPrivate *priv; - - view = EGG_HISTOGRAM_VIEW (widget); - priv = view->priv; - - if (priv->grabbing) { - GtkAllocation allocation; - - gtk_widget_get_allocation (widget, &allocation); - - if ((event->x + BORDER > 0) && (event->x + BORDER < allocation.width)) { - *priv->grabbed = event->x; - gtk_widget_queue_draw (widget); - } - } - else { - if (is_on_border (priv, event->x)) - set_cursor_type (view, GDK_FLEUR); - else - set_cursor_type (view, GDK_ARROW); - } - - return TRUE; -} - -static gboolean -egg_histogram_view_button_release (GtkWidget *widget, - GdkEventButton *event) -{ - EggHistogramView *view; - - view = EGG_HISTOGRAM_VIEW (widget); - set_cursor_type (view, GDK_ARROW); - view->priv->grabbing = FALSE; - g_signal_emit (widget, egg_histogram_view_signals[CHANGED], 0); - - return TRUE; -} - -static gboolean -egg_histogram_view_button_press (GtkWidget *widget, - GdkEventButton *event) -{ - EggHistogramView *view; - EggHistogramViewPrivate *priv; - - view = EGG_HISTOGRAM_VIEW (widget); - priv = view->priv; - - if (is_on_border (priv, event->x)) { - priv->grabbing = TRUE; - priv->grabbed = get_grabbed_border (priv, event->x); - set_cursor_type (view, GDK_FLEUR); - } - - return TRUE; -} - -static void -egg_histogram_view_class_init (EggHistogramViewClass *klass) -{ - GObjectClass *object_class = G_OBJECT_CLASS (klass); - GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass); - - object_class->set_property = egg_histogram_view_set_property; - object_class->get_property = egg_histogram_view_get_property; - object_class->dispose = egg_histogram_view_dispose; - object_class->finalize = egg_histogram_view_finalize; - - widget_class->size_request = egg_histogram_view_size_request; - widget_class->expose_event = egg_histogram_view_expose; - widget_class->button_press_event = egg_histogram_view_button_press; - 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]); - - egg_histogram_view_signals[CHANGED] = - g_signal_new ("changed", - G_OBJECT_CLASS_TYPE (klass), - G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE, - G_STRUCT_OFFSET (EggHistogramViewClass, changed), - NULL, NULL, - g_cclosure_marshal_VOID__VOID, - G_TYPE_NONE, 0); - - g_type_class_add_private (klass, sizeof (EggHistogramViewPrivate)); -} - -static void -egg_histogram_view_init (EggHistogramView *view) -{ - EggHistogramViewPrivate *priv; - - view->priv = priv = EGG_HISTOGRAM_VIEW_GET_PRIVATE (view); - - priv->bins = NULL; - 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; - - gtk_widget_add_events (GTK_WIDGET (view), - GDK_BUTTON_PRESS_MASK | - GDK_BUTTON_RELEASE_MASK | - GDK_BUTTON1_MOTION_MASK | - GDK_POINTER_MOTION_MASK); -} |