1 files changed, 414 insertions, 0 deletions
diff --git a/plug-ins/imagemap/imap_grid.c b/plug-ins/imagemap/imap_grid.c
new file mode 100644
index 0000000..48c6a54
--- /dev/null
+++ b/plug-ins/imagemap/imap_grid.c
@@ -0,0 +1,414 @@
+/*
+ * This is a plug-in for GIMP.
+ *
+ * Generates clickable image maps.
+ *
+ * Copyright (C) 1998-2005 Maurits Rijk  m.rijk@chello.nl
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+
+#include <gtk/gtk.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "imap_grid.h"
+#include "imap_main.h"
+#include "imap_menu.h"
+#include "imap_preview.h"
+#include "imap_table.h"
+
+#include "libgimp/stdplugins-intl.h"
+
+typedef enum {GRID_HIDDEN, GRID_LINES, GRID_CROSSES} GridType_t;
+
+typedef struct {
+   DefaultDialog_t *dialog;
+   GtkWidget *type_frame;
+   GtkWidget *granularity_frame;
+   GtkWidget *offset_frame;
+   GtkWidget *snap;
+   GtkWidget *width;
+   GtkWidget *height;
+   GtkWidget *chain_width_height;
+   GtkWidget *left;
+   GtkWidget *top;
+   GtkWidget *chain_left_top;
+   GtkWidget *hidden;
+   GtkWidget *lines;
+   GtkWidget *crosses;
+   GtkWidget *preview;
+
+   gboolean   enable_preview;
+} GridDialog_t;
+
+
+static gboolean grid_snap = FALSE;
+static gint grid_width = 15;
+static gint grid_height = 15;
+static gint grid_left = 0;
+static gint grid_top = 0;
+static GridType_t grid_type = GRID_LINES;
+
+static void
+grid_settings_ok_cb(gpointer data)
+{
+   GridDialog_t *param = (GridDialog_t*) data;
+   gboolean new_snap;
+
+   new_snap = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(param->snap));
+   grid_width = gtk_spin_button_get_value_as_int(
+      GTK_SPIN_BUTTON(param->width));
+   grid_height = gtk_spin_button_get_value_as_int(
+      GTK_SPIN_BUTTON(param->height));
+   grid_left = gtk_spin_button_get_value_as_int(
+      GTK_SPIN_BUTTON(param->left));
+   grid_top = gtk_spin_button_get_value_as_int(
+      GTK_SPIN_BUTTON(param->top));
+
+   if (grid_snap != new_snap) {
+      grid_snap = new_snap;
+      menu_check_grid(grid_snap);
+   }
+   preview_redraw();
+}
+
+static void
+snap_toggled_cb(GtkWidget *widget, gpointer data)
+{
+   GridDialog_t *param = (GridDialog_t*) data;
+   gint sensitive = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widget));
+
+   gtk_widget_set_sensitive(param->type_frame, sensitive);
+   gtk_widget_set_sensitive(param->granularity_frame, sensitive);
+   gtk_widget_set_sensitive(param->offset_frame, sensitive);
+   gtk_widget_set_sensitive(param->preview, sensitive);
+}
+
+static void
+type_toggled_cb(GtkWidget *widget, gpointer data)
+{
+   if (gtk_widget_get_state (widget) & GTK_STATE_SELECTED)
+     {
+       grid_type = GPOINTER_TO_INT (data);
+       preview_redraw();
+     }
+}
+
+static void
+toggle_preview_cb(GtkWidget *widget, GridDialog_t *param)
+{
+   param->enable_preview =
+      gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widget));
+   preview_redraw();
+}
+
+static void
+grid_assign_value(GtkWidget *widget, gpointer data, gint *value)
+{
+   GridDialog_t *dialog = (GridDialog_t*) data;
+   if (dialog->enable_preview) {
+      *value = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
+      preview_redraw();         /* Fix me! */
+   }
+}
+
+static void
+width_changed_cb(GtkWidget *widget, gpointer data)
+{
+   GridDialog_t *dialog = (GridDialog_t*) data;
+
+   grid_assign_value(widget, data, &grid_width);
+   if (gimp_chain_button_get_active(
+          GIMP_CHAIN_BUTTON(dialog->chain_width_height))) {
+      gint value = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
+      gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->height), value);
+   }
+}
+
+static void
+height_changed_cb(GtkWidget *widget, gpointer data)
+{
+   GridDialog_t *dialog = (GridDialog_t*) data;
+
+   grid_assign_value(widget, data, &grid_height);
+   if (gimp_chain_button_get_active(
+          GIMP_CHAIN_BUTTON(dialog->chain_width_height))) {
+      gint value = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
+      gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->width), value);
+   }
+}
+
+static void
+left_changed_cb(GtkWidget *widget, gpointer data)
+{
+   GridDialog_t *dialog = (GridDialog_t*) data;
+
+   grid_assign_value(widget, data, &grid_left);
+   if (gimp_chain_button_get_active(
+          GIMP_CHAIN_BUTTON(dialog->chain_left_top))) {
+      gint value = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
+      gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->top), value);
+   }
+}
+
+static void
+top_changed_cb(GtkWidget *widget, gpointer data)
+{
+   GridDialog_t *dialog = (GridDialog_t*) data;
+
+   grid_assign_value(widget, data, &grid_top);
+   if (gimp_chain_button_get_active(
+          GIMP_CHAIN_BUTTON(dialog->chain_left_top))) {
+      gint value = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
+      gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->left), value);
+   }
+}
+
+static GridDialog_t*
+create_grid_settings_dialog(void)
+{
+   GridDialog_t *data = g_new(GridDialog_t, 1);
+   DefaultDialog_t *dialog;
+   GtkWidget *main_table, *table, *label;
+   GtkWidget *frame;
+   GtkWidget *hbox;
+   GtkWidget *button;
+   GtkWidget *chain_button;
+
+   data->dialog = dialog = make_default_dialog(_("Grid Settings"));
+   default_dialog_set_ok_cb(dialog, grid_settings_ok_cb, (gpointer) data);
+   main_table = default_dialog_add_table(dialog, 4, 2);
+
+   data->snap = gtk_check_button_new_with_mnemonic(_("_Snap-to grid enabled"));
+   g_signal_connect(data->snap, "toggled",
+                    G_CALLBACK (snap_toggled_cb), data);
+   gtk_table_attach_defaults(GTK_TABLE(main_table), data->snap, 0, 1, 0, 1);
+   gtk_widget_show(data->snap);
+
+   data->type_frame = frame = gimp_frame_new(_("Grid Visibility and Type"));
+   gtk_widget_show(frame);
+   gtk_table_attach_defaults(GTK_TABLE(main_table), frame, 0, 2, 1, 2);
+   hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+   gtk_container_add(GTK_CONTAINER(frame), hbox);
+   gtk_widget_show(hbox);
+
+   button = gtk_radio_button_new_with_mnemonic_from_widget(NULL, _("_Hidden"));
+   data->hidden = button;
+   g_signal_connect(button, "toggled",
+                    G_CALLBACK (type_toggled_cb), (gpointer) GRID_HIDDEN);
+   gtk_box_pack_start(GTK_BOX(hbox), button, FALSE, FALSE, 0);
+   gtk_widget_show(button);
+
+   button = gtk_radio_button_new_with_mnemonic_from_widget(
+      GTK_RADIO_BUTTON(button), _("_Lines"));
+   data->lines = button;
+   g_signal_connect(button, "toggled",
+                    G_CALLBACK (type_toggled_cb), (gpointer) GRID_LINES);
+   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), TRUE);
+   gtk_box_pack_start(GTK_BOX(hbox), button, FALSE, FALSE, 0);
+   gtk_widget_show(button);
+
+   button = gtk_radio_button_new_with_mnemonic_from_widget(
+      GTK_RADIO_BUTTON(button), _("C_rosses"));
+   data->crosses = button;
+   g_signal_connect(button, "toggled",
+                    G_CALLBACK (type_toggled_cb),
+                    (gpointer) GRID_CROSSES);
+   gtk_box_pack_start(GTK_BOX(hbox), button, FALSE, FALSE, 0);
+   gtk_widget_show(button);
+
+   data->granularity_frame = frame = gimp_frame_new(_("Grid Granularity"));
+   gtk_table_attach_defaults(GTK_TABLE(main_table), frame, 0, 1, 2, 3);
+   table = gtk_table_new(2, 4, FALSE);
+   gtk_table_set_row_spacings(GTK_TABLE(table), 6);
+   gtk_table_set_col_spacings(GTK_TABLE(table), 6);
+   gtk_container_add(GTK_CONTAINER(frame), table);
+
+   label = create_label_in_table(table, 0, 0, _("_Width"));
+   data->width = create_spin_button_in_table(table, label, 0, 1, 15, 1, 100);
+   g_signal_connect(data->width, "value-changed",
+                    G_CALLBACK (width_changed_cb), (gpointer) data);
+   create_label_in_table(table, 0, 3, _("pixels"));
+
+   label = create_label_in_table(table, 1, 0, _("_Height"));
+   data->height = create_spin_button_in_table(table, label, 1, 1, 15, 1, 100);
+   g_signal_connect(data->height, "value-changed",
+                    G_CALLBACK (height_changed_cb), (gpointer) data);
+   create_label_in_table(table, 1, 3, _("pixels"));
+
+   chain_button = gimp_chain_button_new(GIMP_CHAIN_RIGHT);
+   data->chain_width_height = chain_button;
+   gtk_table_attach_defaults(GTK_TABLE(table), chain_button, 2, 3, 0, 2);
+   gtk_widget_show(chain_button);
+
+   gtk_widget_show(table);
+   gtk_widget_show(frame);
+
+   data->offset_frame = frame = gimp_frame_new(_("Grid Offset"));
+   gtk_table_attach_defaults(GTK_TABLE(main_table), frame, 1, 2, 2, 3);
+   table = gtk_table_new(2, 3, FALSE);
+   gtk_table_set_row_spacings(GTK_TABLE(table), 6);
+   gtk_table_set_col_spacings(GTK_TABLE(table), 6);
+   gtk_container_add(GTK_CONTAINER(frame), table);
+
+   label = create_label_in_table(table, 0, 2, _("pixels from l_eft"));
+   data->left = create_spin_button_in_table(table, label, 0, 0, 0, 0, 100);
+   g_signal_connect(data->left, "value-changed",
+                    G_CALLBACK (left_changed_cb), (gpointer) data);
+
+   label = create_label_in_table(table, 1, 2, _("pixels from _top"));
+   data->top = create_spin_button_in_table(table, label, 1, 0, 0, 0, 100);
+   g_signal_connect(data->top, "value-changed",
+                    G_CALLBACK (top_changed_cb), (gpointer) data);
+
+   chain_button = gimp_chain_button_new(GIMP_CHAIN_RIGHT);
+   data->chain_left_top = chain_button;
+   gtk_table_attach_defaults(GTK_TABLE(table), chain_button, 1, 2, 0, 2);
+   gtk_widget_show(chain_button);
+
+   data->preview = create_check_button_in_table(main_table, 3, 0,
+                                                _("_Preview"));
+   g_signal_connect(data->preview, "toggled",
+                    G_CALLBACK (toggle_preview_cb), (gpointer) data);
+   gtk_widget_show(data->preview);
+
+   snap_toggled_cb(data->snap, data);
+
+   gtk_widget_show(table);
+   gtk_widget_show(frame);
+
+   return data;
+}
+
+void
+do_grid_settings_dialog(void)
+{
+   static GridDialog_t* dialog;
+   GtkWidget *type;
+
+   if (!dialog)
+      dialog = create_grid_settings_dialog();
+
+   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dialog->snap), grid_snap);
+   gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->width), grid_width);
+   gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->height), grid_height);
+   gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->left), grid_left);
+   gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->top), grid_top);
+
+   if (grid_type == GRID_HIDDEN)
+      type = dialog->hidden;
+   else if (grid_type == GRID_LINES)
+      type = dialog->lines;
+   else
+      type = dialog->crosses;
+   gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(type), TRUE);
+
+   default_dialog_show(dialog->dialog);
+}
+
+static void
+draw_lines(cairo_t *cr, gint width, gint height)
+{
+   gint x, y;
+   gdouble dash = 4.;
+
+   cairo_set_dash (cr, &dash, 1, 0.);
+   for (x = grid_left % grid_width; x < width; x += grid_width)
+      draw_line(cr, x, 1, x, height);
+   for (y = grid_top % grid_height; y < height; y += grid_height)
+      draw_line(cr, 1, y, width, y);
+}
+
+static void
+draw_crosses(cairo_t *cr, gint width, gint height)
+{
+   gint x, y;
+   gdouble dash[4] = { 7., grid_height - 7., 7., grid_width - 7. };
+
+   cairo_set_dash (cr, dash, 2, 4.5 - grid_top);
+   for (x = grid_left % grid_width; x < width; x += grid_width)
+      draw_line(cr, x, 1, x, height);
+   cairo_set_dash (cr, dash+2, 2, 4.5 - grid_left);
+   for (y = grid_top % grid_height; y < height; y += grid_height)
+      draw_line(cr, 1, y, width, y);
+}
+
+void
+draw_grid(cairo_t *cr, gint width, gint height)
+{
+  if (grid_snap && grid_type != GRID_HIDDEN)
+    {
+      cairo_save (cr);
+      if (grid_type == GRID_LINES)
+        {
+          draw_lines(cr, width, height);
+        }
+      else
+        {
+          draw_crosses(cr, width, height);
+        }
+      cairo_restore (cr);
+    }
+}
+
+void
+toggle_grid(void)
+{
+   grid_snap = !grid_snap;
+   preview_redraw();
+}
+
+static gint
+grid_nearest_x(gint x)
+{
+   return grid_left + (x - grid_left + grid_width / 2) / grid_width
+      * grid_width;
+}
+
+static gint
+grid_nearest_y(gint y)
+{
+   return grid_top + (y - grid_top + grid_height / 2) / grid_height
+      * grid_height;
+}
+
+void
+round_to_grid(gint *x, gint *y)
+{
+   if (grid_snap) {
+      *x = grid_nearest_x(*x);
+      *y = grid_nearest_y(*y);
+   }
+}
+
+gboolean
+grid_near_x(gint x)
+{
+   return grid_snap && grid_type != GRID_HIDDEN
+      && abs(grid_nearest_x(x) - x) <= 1;
+}
+
+gboolean
+grid_near_y(gint y)
+{
+   return grid_snap && grid_type != GRID_HIDDEN
+      && abs(grid_nearest_x(y) - y) <= 1;
+}