Initial revision

1 files changed, 464 insertions, 0 deletions

diff --git a/gtk/gtkgamma.c b/gtk/gtkgamma.c
new file mode 100644
index 0000000000..1d7abc6fba
--- /dev/null
+++ b/gtk/gtkgamma.c
@@ -0,0 +1,464 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 1997 David Mosberger
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "gtkgamma.h"
+#include "gtkcurve.h"
+#include "gtkdialog.h"
+#include "gtkdrawingarea.h"
+#include "gtkentry.h"
+#include "gtkhbox.h"
+#include "gtklabel.h"
+#include "gtkmain.h"
+#include "gtkpixmap.h"
+#include "gtkradiobutton.h"
+#include "gtksignal.h"
+#include "gtktable.h"
+#include "gtkvbox.h"
+#include "gtkwindow.h"
+
+static GtkVBoxClass *parent_class = NULL;
+
+
+/* forward declarations: */
+static void gtk_gamma_curve_class_init (GtkGammaCurveClass *class);
+static void gtk_gamma_curve_init (GtkGammaCurve *curve);
+static void gtk_gamma_curve_destroy (GtkObject *object);
+
+enum
+  {
+    LINEAR = 0,
+    SPLINE,
+    FREE,
+    GAMMA,
+    RESET,
+    NUM_XPMS
+  };
+
+static char *xpm[][27] =
+  {
+    /* spline: */
+    {
+      /* width height ncolors chars_per_pixel */
+      "16 16 4 1",
+      /* colors */
+      ". c None",
+      "B c #000000",
+      "+ c #BC2D2D",
+      "r c #FF0000",
+      /* pixels */
+      "..............BB",
+      ".........rrrrrrB",
+      ".......rr.......",
+      ".....B+.........",
+      "....BBB.........",
+      "....+B..........",
+      "....r...........",
+      "...r............",
+      "...r............",
+      "..r.............",
+      "..r.............",
+      ".r..............",
+      ".r..............",
+      ".r..............",
+      "B+..............",
+      "BB.............."
+    },
+    /* linear: */
+    {
+      /* width height ncolors chars_per_pixel */
+      "16 16 5 1",
+      /* colors */
+      ". c None", /* transparent */
+      "B c #000000",
+      "' c #7F7F7F",
+      "+ c #824141",
+      "r c #FF0000",
+      /* pixels */
+      "..............BB",
+      "..............+B",
+      "..............r.",
+      ".............r..",
+      ".............r..",
+      "....'B'.....r...",
+      "....BBB.....r...",
+      "....+B+....r....",
+      "....r.r....r....",
+      "...r...r..r.....",
+      "...r...r..r.....",
+      "..r.....rB+.....",
+      "..r.....BBB.....",
+      ".r......'B'.....",
+      "B+..............",
+      "BB.............."
+    },
+    /* free: */
+    {
+      /* width height ncolors chars_per_pixel */
+      "16 16 2 1",
+      /* colors */
+      ". c None",
+      "r c #FF0000",
+      /* pixels */
+      "................",
+      "................",
+      "......r.........",
+      "......r.........",
+      ".......r........",
+      ".......r........",
+      ".......r........",
+      "........r.......",
+      "........r.......",
+      "........r.......",
+      ".....r...r.rrrrr",
+      "....r....r......",
+      "...r.....r......",
+      "..r.......r.....",
+      ".r........r.....",
+      "r..............."
+    },
+    /* gamma: */
+    {
+      /* width height ncolors chars_per_pixel */
+      "16 16 10 1",
+      /* colors */
+      ". c None",
+      "B c #000000",
+      "& c #171717",
+      "# c #2F2F2F",
+      "X c #464646",
+      "= c #5E5E5E",
+      "/ c #757575",
+      "+ c #8C8C8C",
+      "- c #A4A4A4",
+      "` c #BBBBBB",
+      /* pixels */
+      "................",
+      "................",
+      "................",
+      "....B=..+B+.....",
+      "....X&`./&-.....",
+      "...../+.XX......",
+      "......B.B+......",
+      "......X.X.......",
+      "......X&+.......",
+      "......-B........",
+      "....../=........",
+      "......#B........",
+      "......BB........",
+      "......B#........",
+      "................",
+      "................"
+    },
+    /* reset: */
+    {
+      /* width height ncolors chars_per_pixel */
+      "16 16 4 1",
+      /* colors */
+      ". c None",
+      "B c #000000",
+      "+ c #824141",
+      "r c #FF0000",
+      /* pixels */
+      "..............BB",
+      "..............+B",
+      ".............r..",
+      "............r...",
+      "...........r....",
+      "..........r.....",
+      ".........r......",
+      "........r.......",
+      ".......r........",
+      "......r.........",
+      ".....r..........",
+      "....r...........",
+      "...r............",
+      "..r.............",
+      "B+..............",
+      "BB.............."
+    }
+  };
+
+guint
+gtk_gamma_curve_get_type (void)
+{
+  static guint gamma_curve_type = 0;
+
+  if (!gamma_curve_type)
+    {
+      GtkTypeInfo gamma_curve_info =
+      {
+	"GtkGammaCurve",
+	sizeof (GtkGammaCurve),
+	sizeof (GtkGammaCurveClass),
+	(GtkClassInitFunc) gtk_gamma_curve_class_init,
+	(GtkObjectInitFunc) gtk_gamma_curve_init,
+	(GtkArgFunc) NULL,
+      };
+
+      gamma_curve_type =
+	gtk_type_unique (gtk_vbox_get_type (), &gamma_curve_info);
+    }
+  return gamma_curve_type;
+}
+
+static void
+gtk_gamma_curve_class_init (GtkGammaCurveClass *class)
+{
+  GtkObjectClass *object_class;
+
+  parent_class = gtk_type_class (gtk_vbox_get_type ());
+
+  object_class = (GtkObjectClass *) class;
+  object_class->destroy = gtk_gamma_curve_destroy;
+}
+
+static void
+gtk_gamma_curve_init (GtkGammaCurve *curve)
+{
+  curve->gamma = 1.0;
+}
+
+static void
+button_realize_callback (GtkWidget *w)
+{
+  GtkWidget *pixmap;
+  GdkBitmap *mask;
+  GdkPixmap *pm;
+  int i;
+
+  i = (long) gtk_object_get_data (GTK_OBJECT (w), "_GtkGammaCurveIndex");
+  pm = gdk_pixmap_create_from_xpm_d (w->window, &mask,
+				     &w->style->bg[GTK_STATE_NORMAL], xpm[i]);
+
+  pixmap = gtk_pixmap_new (pm, mask);
+  gtk_container_add (GTK_CONTAINER (w), pixmap);
+  gtk_widget_show (pixmap);
+
+  gdk_pixmap_destroy (pm);
+  gdk_pixmap_destroy (mask);	/* a bitmap is really just a special pixmap */
+}
+
+static void
+button_toggled_callback (GtkWidget *w, gpointer data)
+{
+  GtkGammaCurve *c = data;
+  GtkCurveType type;
+  int active, i;
+
+  if (!GTK_TOGGLE_BUTTON (w)->active)
+    return;
+
+  active = (long) gtk_object_get_data (GTK_OBJECT (w), "_GtkGammaCurveIndex");
+
+  for (i = 0; i < 3; ++i)
+    if ((i != active) && GTK_TOGGLE_BUTTON (c->button[i])->active)
+      break;
+
+  if (i < 3)
+    gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (c->button[i]), FALSE);
+
+  switch (active)
+    {
+    case 0:  type = GTK_CURVE_TYPE_SPLINE; break;
+    case 1:  type = GTK_CURVE_TYPE_LINEAR; break;
+    default: type = GTK_CURVE_TYPE_FREE; break;
+    }
+  gtk_curve_set_curve_type (GTK_CURVE (c->curve), type);
+}
+
+static void
+gamma_cancel_callback (GtkWidget *w, gpointer data)
+{
+  GtkGammaCurve *c = data;
+
+  gtk_widget_destroy (c->gamma_dialog);
+  c->gamma_dialog = 0;
+}
+
+static void
+gamma_ok_callback (GtkWidget *w, gpointer data)
+{
+  GtkGammaCurve *c = data;
+  gchar *start, *end;
+  gfloat v;
+
+  start = gtk_entry_get_text (GTK_ENTRY (c->gamma_text));
+  if (start)
+    {
+      v = strtod (start, &end);
+      if (end > start && v > 0.0)
+	c->gamma = v;
+    }
+  gtk_curve_set_gamma (GTK_CURVE (c->curve), c->gamma);
+  gamma_cancel_callback (w, data);
+}
+
+static void
+button_clicked_callback (GtkWidget *w, gpointer data)
+{
+  GtkGammaCurve *c = data;
+  int active;
+
+  active = (long) gtk_object_get_data (GTK_OBJECT (w), "_GtkGammaCurveIndex");
+  if (active == 3)
+    /* set gamma */
+    if (c->gamma_dialog)
+      return;
+    else
+      {
+	GtkWidget *vbox, *hbox, *label, *button;
+	gchar buf[64];
+
+	c->gamma_dialog = gtk_dialog_new ();
+	gtk_window_set_title (GTK_WINDOW (c->gamma_dialog), "Gamma");
+	vbox = GTK_DIALOG (c->gamma_dialog)->vbox;
+
+	hbox = gtk_hbox_new (/* homogeneous */ FALSE, 0);
+	gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 2);
+	gtk_widget_show (hbox);
+
+	label = gtk_label_new ("Gamma value");
+	gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 2);
+	gtk_widget_show (label);
+
+	sprintf (buf, "%g", c->gamma);
+	c->gamma_text = gtk_entry_new ();
+	gtk_entry_set_text (GTK_ENTRY (c->gamma_text), buf);
+	gtk_box_pack_start (GTK_BOX (hbox), c->gamma_text, TRUE, TRUE, 2);
+	gtk_widget_show (c->gamma_text);
+
+	/* fill in action area: */
+	hbox = GTK_DIALOG (c->gamma_dialog)->action_area;
+
+	button = gtk_button_new_with_label ("OK");
+	GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
+	gtk_signal_connect (GTK_OBJECT (button), "clicked",
+			    (GtkSignalFunc) gamma_ok_callback, c);
+	gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
+	gtk_widget_grab_default (button);
+	gtk_widget_show (button);
+
+	button = gtk_button_new_with_label ("Cancel");
+	gtk_signal_connect (GTK_OBJECT (button), "clicked",
+			    (GtkSignalFunc) gamma_cancel_callback, c);
+	gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
+	gtk_widget_show (button);
+
+	gtk_widget_show (c->gamma_dialog);
+      }
+  else
+    /* reset */
+    gtk_curve_reset (GTK_CURVE (c->curve));
+}
+
+static void
+curve_type_changed_callback (GtkWidget *w, gpointer data)
+{
+  GtkGammaCurve *c = data;
+  GtkCurveType new_type;
+  int active;
+
+  new_type = GTK_CURVE (w)->curve_type;
+  switch (new_type)
+    {
+    case GTK_CURVE_TYPE_SPLINE: active = 0; break;
+    case GTK_CURVE_TYPE_LINEAR: active = 1; break;
+    default:		        active = 2; break;
+    }
+  if (!GTK_TOGGLE_BUTTON (c->button[active])->active)
+    gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (c->button[active]), TRUE);
+}
+
+GtkWidget*
+gtk_gamma_curve_new (void)
+{
+  GtkGammaCurve *c;
+  GtkWidget *vbox;
+  int i;
+
+  c = gtk_type_new (gtk_gamma_curve_get_type ());
+
+  c->table = gtk_table_new (1, 2, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (c->table), 3);
+  gtk_container_add (GTK_CONTAINER (c), c->table);
+
+  c->curve = gtk_curve_new ();
+  gtk_signal_connect (GTK_OBJECT (c->curve), "curve_type_changed",
+		      (GtkSignalFunc) curve_type_changed_callback, c);
+  gtk_table_attach_defaults (GTK_TABLE (c->table), c->curve, 0, 1, 0, 1);
+
+  vbox = gtk_vbox_new (/* homogeneous */ FALSE, /* spacing */ 3);
+  gtk_table_attach (GTK_TABLE (c->table), vbox, 1, 2, 0, 1, 0, 0, 0, 0);
+
+  /* toggle buttons: */
+  for (i = 0; i < 3; ++i)
+    {
+      c->button[i] = gtk_toggle_button_new ();
+      gtk_object_set_data (GTK_OBJECT (c->button[i]), "_GtkGammaCurveIndex",
+			   (gpointer) (long) i);
+      gtk_container_add (GTK_CONTAINER (vbox), c->button[i]);
+      gtk_signal_connect (GTK_OBJECT (c->button[i]), "realize",
+			  (GtkSignalFunc) button_realize_callback, 0);
+      gtk_signal_connect (GTK_OBJECT (c->button[i]), "toggled",
+			  (GtkSignalFunc) button_toggled_callback, c);
+      gtk_widget_show (c->button[i]);
+    }
+
+  /* push buttons: */
+  for (i = 3; i < 5; ++i)
+    {
+      c->button[i] = gtk_button_new ();
+      gtk_object_set_data (GTK_OBJECT (c->button[i]), "_GtkGammaCurveIndex",
+			   (gpointer) (long) i);
+      gtk_container_add (GTK_CONTAINER (vbox), c->button[i]);
+      gtk_signal_connect (GTK_OBJECT (c->button[i]), "realize",
+			  (GtkSignalFunc) button_realize_callback, 0);
+      gtk_signal_connect (GTK_OBJECT (c->button[i]), "clicked",
+			  (GtkSignalFunc) button_clicked_callback, c);
+      gtk_widget_show (c->button[i]);
+    }
+
+  gtk_widget_show (vbox);
+  gtk_widget_show (c->table);
+  gtk_widget_show (c->curve);
+
+  return GTK_WIDGET (c);
+}
+
+static void
+gtk_gamma_curve_destroy (GtkObject *object)
+{
+  GtkGammaCurve *c;
+
+  g_return_if_fail (object != NULL);
+  g_return_if_fail (GTK_IS_GAMMA_CURVE (object));
+
+  c = GTK_GAMMA_CURVE (object);
+
+  if (c->gamma_dialog)
+    {
+      gtk_widget_destroy (c->gamma_dialog);
+      c->gamma_dialog = 0;
+    }
+
+  if (GTK_OBJECT_CLASS (parent_class)->destroy)
+    (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
+}