mirror of https://github.com/GNOME/gimp.git
423 lines
14 KiB
C
423 lines
14 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <gtk/gtk.h>
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#include "libgimpmath/gimpmath.h"
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#include "libgimpwidgets/gimpwidgets.h"
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#include "widgets-types.h"
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#include "base/gimphistogram.h"
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#include "gimpcolorbar.h"
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#include "gimphistogrambox.h"
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#include "gimphistogramview.h"
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#include "gimp-intl.h"
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/* #define DEBUG_VIEW */
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#define GRADIENT_HEIGHT 12
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#define CONTROL_HEIGHT 8
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#define HISTOGRAM_EVENT_MASK (GDK_BUTTON_PRESS_MASK | \
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GDK_BUTTON_RELEASE_MASK | \
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GDK_BUTTON_MOTION_MASK)
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/* local function prototypes */
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static void gimp_histogram_box_low_adj_update (GtkAdjustment *adj,
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GimpHistogramBox *box);
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static void gimp_histogram_box_high_adj_update (GtkAdjustment *adj,
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GimpHistogramBox *box);
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static void gimp_histogram_box_histogram_range (GimpHistogramView *view,
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gint start,
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gint end,
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GimpHistogramBox *box);
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static void gimp_histogram_box_channel_notify (GimpHistogramView *view,
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GParamSpec *pspec,
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GimpColorBar *bar);
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static void gimp_histogram_box_border_notify (GimpHistogramView *view,
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GParamSpec *pspec,
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GimpColorBar *bar);
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static gboolean gimp_histogram_slider_area_event (GtkWidget *widget,
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GdkEvent *event,
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GimpHistogramBox *box);
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static gboolean gimp_histogram_slider_area_expose (GtkWidget *widget,
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GdkEvent *event,
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GimpHistogramBox *box);
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static void gimp_histogram_draw_slider (GtkWidget *widget,
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GdkGC *border_gc,
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GdkGC *fill_gc,
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gint xpos);
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G_DEFINE_TYPE (GimpHistogramBox, gimp_histogram_box, GTK_TYPE_VBOX)
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static void
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gimp_histogram_box_class_init (GimpHistogramBoxClass *klass)
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{
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}
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static void
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gimp_histogram_box_init (GimpHistogramBox *box)
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{
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GtkWidget *hbox;
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GtkWidget *vbox;
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GtkWidget *spinbutton;
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GtkObject *adjustment;
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GtkWidget *frame;
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GtkWidget *view;
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GtkWidget *bar;
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GtkWidget *slider_area;
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gtk_box_set_spacing (GTK_BOX (box), 2);
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/* The histogram */
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frame = gtk_frame_new (NULL);
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gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
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gtk_box_pack_start (GTK_BOX (box), frame, TRUE, TRUE, 0);
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gtk_widget_show (frame);
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view = gimp_histogram_view_new (TRUE);
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gtk_container_add (GTK_CONTAINER (frame), view);
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gtk_widget_show (view);
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g_signal_connect (view, "range-changed",
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G_CALLBACK (gimp_histogram_box_histogram_range),
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box);
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box->view = GIMP_HISTOGRAM_VIEW (view);
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/* The gradient below the histogram */
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frame = gtk_frame_new (NULL);
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gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
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gtk_box_pack_start (GTK_BOX (box), frame, FALSE, FALSE, 0);
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gtk_widget_show (frame);
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box->slider_area = slider_area = gtk_event_box_new ();
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gtk_widget_set_size_request (slider_area, -1,
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GRADIENT_HEIGHT + CONTROL_HEIGHT);
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gtk_widget_add_events (slider_area, HISTOGRAM_EVENT_MASK);
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gtk_container_add (GTK_CONTAINER (frame), slider_area);
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gtk_widget_show (slider_area);
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g_signal_connect (slider_area, "event",
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G_CALLBACK (gimp_histogram_slider_area_event),
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box);
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g_signal_connect_after (slider_area, "expose-event",
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G_CALLBACK (gimp_histogram_slider_area_expose),
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box);
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vbox = gtk_vbox_new (FALSE, 0);
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gtk_container_add (GTK_CONTAINER (slider_area), vbox);
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gtk_widget_show (vbox);
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bar = g_object_new (GIMP_TYPE_COLOR_BAR,
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"histogram-channel", box->view->channel,
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"xpad", box->view->border_width,
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"ypad", box->view->border_width,
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NULL);
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gtk_widget_set_size_request (bar,
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-1,
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GRADIENT_HEIGHT + 2 * box->view->border_width);
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gtk_box_pack_start (GTK_BOX (vbox), bar, FALSE, FALSE, 0);
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gtk_widget_show (bar);
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g_signal_connect (view, "notify::histogram-channel",
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G_CALLBACK (gimp_histogram_box_channel_notify),
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bar);
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g_signal_connect (view, "notify::border-width",
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G_CALLBACK (gimp_histogram_box_border_notify),
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bar);
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/* The range selection */
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hbox = gtk_hbox_new (FALSE, 6);
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gtk_box_pack_start (GTK_BOX (box), hbox, FALSE, FALSE, 0);
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gtk_widget_show (hbox);
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/* low spinbutton */
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spinbutton = gimp_spin_button_new (&adjustment,
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0.0, 0.0, 255.0, 1.0, 16.0, 0.0,
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1.0, 0);
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box->low_adj = GTK_ADJUSTMENT (adjustment);
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gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
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gtk_widget_show (spinbutton);
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g_signal_connect (adjustment, "value-changed",
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G_CALLBACK (gimp_histogram_box_low_adj_update),
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box);
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/* high spinbutton */
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spinbutton = gimp_spin_button_new (&adjustment,
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255.0, 0.0, 255.0, 1.0, 16.0, 0.0,
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1.0, 0);
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box->high_adj = GTK_ADJUSTMENT (adjustment);
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gtk_box_pack_end (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
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gtk_widget_show (spinbutton);
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g_signal_connect (adjustment, "value-changed",
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G_CALLBACK (gimp_histogram_box_high_adj_update),
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box);
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#ifdef DEBUG_VIEW
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spinbutton = gimp_prop_spin_button_new (G_OBJECT (box->view), "border-width",
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1, 5, 0);
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gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
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gtk_widget_show (spinbutton);
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spinbutton = gimp_prop_spin_button_new (G_OBJECT (box->view), "subdivisions",
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1, 5, 0);
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gtk_box_pack_start (GTK_BOX (hbox), spinbutton, FALSE, FALSE, 0);
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gtk_widget_show (spinbutton);
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#endif
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}
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static void
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gimp_histogram_box_low_adj_update (GtkAdjustment *adjustment,
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GimpHistogramBox *box)
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{
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if ((gdouble) box->view->start == adjustment->value)
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return;
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box->high_adj->lower = adjustment->value;
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gtk_adjustment_changed (box->high_adj);
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gimp_histogram_view_set_range (box->view,
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adjustment->value, box->view->end);
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gtk_widget_queue_draw (box->slider_area);
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}
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static void
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gimp_histogram_box_high_adj_update (GtkAdjustment *adjustment,
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GimpHistogramBox *box)
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{
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if ((gdouble) box->view->end == adjustment->value)
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return;
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box->low_adj->upper = adjustment->value;
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gtk_adjustment_changed (box->low_adj);
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gimp_histogram_view_set_range (box->view,
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box->view->start, adjustment->value);
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gtk_widget_queue_draw (box->slider_area);
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}
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static void
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gimp_histogram_box_histogram_range (GimpHistogramView *view,
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gint start,
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gint end,
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GimpHistogramBox *box)
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{
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box->high_adj->lower = start;
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box->low_adj->upper = end;
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gtk_adjustment_changed (box->high_adj);
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gtk_adjustment_changed (box->low_adj);
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gtk_adjustment_set_value (box->low_adj, start);
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gtk_adjustment_set_value (box->high_adj, end);
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gtk_widget_queue_draw (box->slider_area);
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}
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static void
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gimp_histogram_box_channel_notify (GimpHistogramView *view,
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GParamSpec *pspec,
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GimpColorBar *bar)
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{
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gimp_color_bar_set_channel (bar, view->channel);
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}
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static void
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gimp_histogram_box_border_notify (GimpHistogramView *view,
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GParamSpec *pspec,
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GimpColorBar *bar)
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{
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g_object_set (bar,
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"xpad", view->border_width,
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"ypad", view->border_width,
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NULL);
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gtk_widget_set_size_request (GTK_WIDGET (bar),
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-1, GRADIENT_HEIGHT + 2 * view->border_width);
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}
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GtkWidget *
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gimp_histogram_box_new (void)
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{
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return g_object_new (GIMP_TYPE_HISTOGRAM_BOX, NULL);
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}
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void
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gimp_histogram_box_set_channel (GimpHistogramBox *box,
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GimpHistogramChannel channel)
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{
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g_return_if_fail (GIMP_IS_HISTOGRAM_BOX (box));
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if (box->view)
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gimp_histogram_view_set_channel (box->view, channel);
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}
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static gboolean
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gimp_histogram_slider_area_event (GtkWidget *widget,
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GdkEvent *event,
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GimpHistogramBox *box)
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{
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GdkEventButton *bevent;
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GdkEventMotion *mevent;
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gint x, distance;
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gint i;
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gboolean update = FALSE;
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switch (event->type)
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{
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case GDK_BUTTON_PRESS:
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bevent = (GdkEventButton *) event;
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distance = G_MAXINT;
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for (i = 0; i < 2; i++)
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if (fabs (bevent->x - box->slider_pos[i]) < distance)
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{
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box->active_slider = i;
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distance = fabs (bevent->x - box->slider_pos[i]);
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}
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x = bevent->x;
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update = TRUE;
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break;
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case GDK_BUTTON_RELEASE:
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switch (box->active_slider)
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{
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case 3: /* low output */
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gtk_adjustment_set_value (box->low_adj, box->low_slider_val);
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break;
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case 4: /* high output */
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gtk_adjustment_set_value (box->high_adj, box->high_slider_val);
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break;
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}
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break;
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case GDK_MOTION_NOTIFY:
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mevent = (GdkEventMotion *) event;
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gdk_window_get_pointer (widget->window, &x, NULL, NULL);
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update = TRUE;
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break;
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default:
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break;
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}
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if (update)
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{
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gdouble value;
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gint border = box->view->border_width;
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gint width = widget->allocation.width - 2 * border;
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if (width < 1)
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return FALSE;
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switch (box->active_slider)
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{
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case 0: /* low output */
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value = (gdouble) (x - border) / (gdouble) width * 256.0;
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gtk_adjustment_set_value (box->low_adj, CLAMP (value, 0, 255));
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break;
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case 1: /* high output */
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value = (gdouble) (x - border) / (gdouble) width * 256.0;
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gtk_adjustment_set_value (box->high_adj, CLAMP (value, 0, 255));
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break;
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}
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}
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return FALSE;
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}
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static gboolean
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gimp_histogram_slider_area_expose (GtkWidget *widget,
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GdkEvent *event,
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GimpHistogramBox *box)
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{
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gint border = box->view->border_width;
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gint width = widget->allocation.width - 2 * border;
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box->slider_pos[0] = border + ROUND ((gdouble) width *
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box->high_adj->lower / 256.0);
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box->slider_pos[1] = border + ROUND ((gdouble) width *
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(box->low_adj->upper + 1.0) / 256.0);
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gimp_histogram_draw_slider (widget,
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widget->style->black_gc,
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widget->style->black_gc,
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box->slider_pos[0]);
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gimp_histogram_draw_slider (widget,
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widget->style->black_gc,
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widget->style->white_gc,
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box->slider_pos[1]);
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return FALSE;
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}
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static void
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gimp_histogram_draw_slider (GtkWidget *widget,
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GdkGC *border_gc,
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GdkGC *fill_gc,
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gint xpos)
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{
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gint y;
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for (y = 0; y < CONTROL_HEIGHT; y++)
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gdk_draw_line (widget->window, fill_gc,
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xpos - y / 2, GRADIENT_HEIGHT + y,
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xpos + y / 2, GRADIENT_HEIGHT + y);
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gdk_draw_line (widget->window, border_gc,
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xpos,
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GRADIENT_HEIGHT,
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xpos - (CONTROL_HEIGHT - 1) / 2,
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GRADIENT_HEIGHT + CONTROL_HEIGHT - 1);
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gdk_draw_line (widget->window, border_gc,
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xpos,
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GRADIENT_HEIGHT,
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xpos + (CONTROL_HEIGHT - 1) / 2,
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GRADIENT_HEIGHT + CONTROL_HEIGHT - 1);
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gdk_draw_line (widget->window, border_gc,
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xpos - (CONTROL_HEIGHT - 1) / 2,
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GRADIENT_HEIGHT + CONTROL_HEIGHT - 1,
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xpos + (CONTROL_HEIGHT - 1) / 2,
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GRADIENT_HEIGHT + CONTROL_HEIGHT - 1);
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}
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