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- /* LIBGIMP - The GIMP Library
- * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
- *
- * gimpgradientmenu.c
- * Copyright (C) 1998 Andy Thomas
- *
- * 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 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 Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
- #include <string.h>
-
- #include "gimp.h"
- #include "gimpui.h"
-
-
- /* Idea is to have a function to call that returns a widget that
- * completely controls the selection of a gradient.
- * you get a widget returned that you can use in a table say.
- * In:- Initial gradient name. Null means use current selection.
- * pointer to func to call when gradient changes (GimpRunGradientCallback).
- * Returned:- Pointer to a widget that you can use in UI.
- *
- * Widget simply made up of a preview widget (20x40) containing the gradient
- * which can be clicked on to changed the gradient selection.
- */
-
-
- #define GSEL_DATA_KEY "__gsel_data"
- #define CELL_SIZE_HEIGHT 18
- #define CELL_SIZE_WIDTH 84
-
-
- struct __gradients_sel
- {
- gchar *dname;
- GimpRunGradientCallback cback;
- GtkWidget *gradient_preview;
- GtkWidget *button;
- gchar *gradient_popup_pnt;
- gint width;
- gchar *gradient_name; /* Local copy */
- gdouble *grad_data; /* local copy */
- gint sample_size;
- gpointer data;
- };
-
- typedef struct __gradients_sel GSelect;
-
- static void
- gradient_pre_update (GtkWidget *gradient_preview,
- gint width_data,
- gdouble *grad_data)
- {
- gint x;
- gint y;
- gdouble *src;
- gdouble r, g, b, a;
- gdouble c0, c1;
- guchar *p0;
- guchar *p1;
- guchar *even;
- guchar *odd;
- gint width;
-
- width = width_data / 4;
-
- /* Draw the gradient */
- src = grad_data;
- p0 = even = g_malloc (width * 3);
- p1 = odd = g_malloc (width * 3);
-
- for (x = 0; x < width; x++)
- {
- r = src[x*4+0];
- g = src[x*4+1];
- b = src[x*4+2];
- a = src[x*4+3];
-
- if ((x / GIMP_CHECK_SIZE_SM) & 1)
- {
- c0 = GIMP_CHECK_LIGHT;
- c1 = GIMP_CHECK_DARK;
- }
- else
- {
- c0 = GIMP_CHECK_DARK;
- c1 = GIMP_CHECK_LIGHT;
- }
-
- *p0++ = (c0 + (r - c0) * a) * 255.0;
- *p0++ = (c0 + (g - c0) * a) * 255.0;
- *p0++ = (c0 + (b - c0) * a) * 255.0;
-
- *p1++ = (c1 + (r - c1) * a) * 255.0;
- *p1++ = (c1 + (g - c1) * a) * 255.0;
- *p1++ = (c1 + (b - c1) * a) * 255.0;
- }
-
- for (y = 0; y < CELL_SIZE_HEIGHT; y++)
- {
- if ((y / GIMP_CHECK_SIZE_SM) & 1)
- gtk_preview_draw_row (GTK_PREVIEW (gradient_preview),
- (guchar *)odd, 0, y,
- (width < CELL_SIZE_WIDTH) ? width : CELL_SIZE_WIDTH);
- else
- gtk_preview_draw_row (GTK_PREVIEW (gradient_preview),
- (guchar *)even, 0, y,
- (width < CELL_SIZE_WIDTH) ? width : CELL_SIZE_WIDTH);
- }
-
- g_free (even);
- g_free (odd);
-
- /* Draw the brush preview */
- gtk_widget_draw (gradient_preview, NULL);
- }
-
- static void
- gradient_select_invoker (gchar *name,
- gint width,
- gdouble *grad_data,
- gint closing,
- gpointer data)
- {
- GSelect *gsel = (GSelect*)data;
-
- if (gsel->grad_data != NULL)
- g_free (gsel->grad_data);
-
- gsel->width = width;
- if (gsel->gradient_name)
- g_free (gsel->gradient_name);
-
- gsel->gradient_name = g_strdup (name);
- /* one row only each row has four doubles r,g,b,a */
- gsel->grad_data = g_new (gdouble, width);
- /* printf("name = %s width = %d\n",name,width);*/
- g_memmove (gsel->grad_data, grad_data, width * sizeof (gdouble));
- gradient_pre_update (gsel->gradient_preview, gsel->width, gsel->grad_data);
-
- if (gsel->cback != NULL)
- (gsel->cback)(name, width, grad_data, closing, gsel->data);
-
- if (closing)
- gtk_widget_set_sensitive (gsel->button, TRUE);
- }
-
-
- static void
- gradient_preview_callback (GtkWidget *widget,
- gpointer data)
- {
- GSelect *gsel = (GSelect*)data;
-
- gtk_widget_set_sensitive (gsel->button, FALSE);
-
- gsel->gradient_popup_pnt =
- gimp_interactive_selection_gradient ((gsel->dname) ? gsel->dname
- : "Gradient Plugin Selection",
- gsel->gradient_name,
- gsel->sample_size,
- gradient_select_invoker,
- gsel);
- }
-
- GtkWidget *
- gimp_gradient_select_widget (gchar *dname,
- gchar *igradient,
- GimpRunGradientCallback cback,
- gpointer data)
- {
- GtkWidget *button;
- GtkWidget *hbox;
- GtkWidget *gradient;
- gint width;
- gdouble *grad_data;
- gchar *gradient_name;
- GSelect *gsel;
-
- gsel = g_new (GSelect, 1);
-
- hbox = gtk_hbox_new (FALSE, 3);
- gtk_widget_show(hbox);
-
- button = gtk_button_new ();
-
- gradient = gtk_preview_new (GTK_PREVIEW_COLOR);
- gtk_preview_size (GTK_PREVIEW (gradient), CELL_SIZE_WIDTH, CELL_SIZE_HEIGHT);
- gtk_widget_show (gradient);
- gtk_container_add (GTK_CONTAINER (button), gradient);
-
- gtk_signal_connect (GTK_OBJECT (button), "clicked",
- (GtkSignalFunc) gradient_preview_callback,
- (gpointer)gsel);
-
- gtk_widget_show(button);
-
- gsel->button = button;
- gsel->cback = cback;
- gsel->data = data;
- gsel->grad_data = NULL;
- gsel->gradient_preview = gradient;
- gsel->dname = dname;
- gsel->gradient_popup_pnt = NULL;
- gsel->sample_size = CELL_SIZE_WIDTH;
-
- /* Do initial gradient setup */
- gradient_name =
- gimp_gradients_get_gradient_data (igradient, &width, CELL_SIZE_WIDTH, &grad_data);
-
- if (gradient_name)
- {
- gradient_pre_update (gsel->gradient_preview, width, grad_data);
- gsel->grad_data = grad_data;
- gsel->gradient_name = gradient_name;
- gsel->width = width;
- }
- else
- {
- gsel->gradient_name = g_strdup (igradient);
- }
-
- gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
-
- gtk_object_set_data (GTK_OBJECT (hbox), GSEL_DATA_KEY, (gpointer)gsel);
-
- return hbox;
- }
-
-
- void
- gimp_gradient_select_widget_close_popup (GtkWidget *widget)
- {
- GSelect *gsel;
-
- gsel = (GSelect*) gtk_object_get_data (GTK_OBJECT (widget), GSEL_DATA_KEY);
-
- if (gsel && gsel->gradient_popup_pnt)
- {
- gimp_gradients_close_popup (gsel->gradient_popup_pnt);
- gsel->gradient_popup_pnt = NULL;
- }
- }
-
- void
- gimp_gradient_select_widget_set_popup (GtkWidget *widget,
- gchar *gname)
- {
- gint width;
- gdouble *grad_data;
- gchar *gradient_name;
- GSelect *gsel;
-
- gsel = (GSelect*) gtk_object_get_data (GTK_OBJECT (widget), GSEL_DATA_KEY);
-
- if (gsel)
- {
- gradient_name =
- gimp_gradients_get_gradient_data (gname, &width, gsel->sample_size, &grad_data);
-
- if (gradient_name)
- {
- gradient_select_invoker (gname, width, grad_data, 0, gsel);
-
- if (gsel->gradient_popup_pnt)
- gimp_gradients_set_popup (gsel->gradient_popup_pnt, gname);
- }
- }
- }
-