/* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include #include "gtkcolorsel.h" #include "gtkhbbox.h" /* * If you change the way the color values are stored, * please make sure to update the drag & drop support so it sends * across all the color info (currently RGBA). - Elliot */ #ifndef M_PI #define M_PI 3.14159265358979323846 #endif /* M_PI */ #define DEGTORAD(a) (2.0*M_PI*a/360.0) #define SQR(a) (a*a) #define TIMER_DELAY 300 #define CIRCLE_RADIUS 65 #define WHEEL_WIDTH 2*CIRCLE_RADIUS+2 #define WHEEL_HEIGHT 2*CIRCLE_RADIUS+2 #define VALUE_WIDTH 32 #define VALUE_HEIGHT WHEEL_HEIGHT #define SAMPLE_WIDTH WHEEL_WIDTH+VALUE_WIDTH+5 #define SAMPLE_HEIGHT 28 static void gtk_color_selection_class_init (GtkColorSelectionClass *klass); static void gtk_color_selection_init (GtkColorSelection *colorsel); static void gtk_color_selection_dialog_class_init(GtkColorSelectionDialogClass *klass); static void gtk_color_selection_dialog_init(GtkColorSelectionDialog *colorseldiag); enum { COLOR_CHANGED, LAST_SIGNAL }; enum { RGB_INPUTS = 1 << 0, HSV_INPUTS = 1 << 1, OPACITY_INPUTS = 1 << 2 }; enum { SCALE, ENTRY, BOTH }; enum { HUE, SATURATION, VALUE, RED, GREEN, BLUE, OPACITY, NUM_CHANNELS }; typedef struct { gchar *label; gfloat lower, upper, step_inc, page_inc; GtkSignalFunc updater; } scale_val_type; #define HSV_TO_RGB() gtk_color_selection_hsv_to_rgb( \ colorsel->values[HUE], \ colorsel->values[SATURATION], \ colorsel->values[VALUE], \ &colorsel->values[RED], \ &colorsel->values[GREEN], \ &colorsel->values[BLUE]) #define RGB_TO_HSV() gtk_color_selection_rgb_to_hsv( \ colorsel->values[RED], \ colorsel->values[GREEN], \ colorsel->values[BLUE], \ &colorsel->values[HUE], \ &colorsel->values[SATURATION], \ &colorsel->values[VALUE]) static void gtk_color_selection_hsv_updater (GtkWidget *widget, gpointer data); static void gtk_color_selection_rgb_updater (GtkWidget *widget, gpointer data); static void gtk_color_selection_opacity_updater (GtkWidget *widget, gpointer data); static void gtk_color_selection_realize (GtkWidget *widget); static void gtk_color_selection_unrealize (GtkWidget *widget); static void gtk_color_selection_finalize (GtkObject *object); static void gtk_color_selection_color_changed (GtkColorSelection *colorsel); static void gtk_color_selection_update_input (GtkWidget *scale, GtkWidget *entry, gdouble value); static void gtk_color_selection_update_inputs (GtkColorSelection *colorsel, gint inputs, gint which); static void gtk_color_selection_update_value (GtkColorSelection *colorsel, gint y); static void gtk_color_selection_update_wheel (GtkColorSelection *colorsel, gint x, gint y); static void gtk_color_selection_value_resize (GtkWidget *widget, gpointer data); static gint gtk_color_selection_value_events (GtkWidget *area, GdkEvent *event); static gint gtk_color_selection_value_timeout (GtkColorSelection *colorsel); static void gtk_color_selection_wheel_resize (GtkWidget *widget, gpointer data); static gint gtk_color_selection_wheel_events (GtkWidget *area, GdkEvent *event); static gint gtk_color_selection_wheel_timeout (GtkColorSelection *colorsel); static void gtk_color_selection_sample_resize (GtkWidget *widget, gpointer data); static void gtk_color_selection_drop_handle (GtkWidget *widget, GdkEvent *event, GtkWidget *theclorsel); static void gtk_color_selection_drag_handle (GtkWidget *widget, GdkEvent *event, GtkWidget *thecolorsel); static void gtk_color_selection_draw_wheel_marker (GtkColorSelection *colorsel); static void gtk_color_selection_draw_wheel_frame (GtkColorSelection *colorsel); static void gtk_color_selection_draw_value_marker (GtkColorSelection *colorsel); static void gtk_color_selection_draw_value_bar (GtkColorSelection *colorsel, gint resize); static void gtk_color_selection_draw_wheel (GtkColorSelection *colorsel, gint resize); static void gtk_color_selection_draw_sample (GtkColorSelection *colorsel, gint resize); static gint gtk_color_selection_eval_wheel (gint x, gint y, gdouble cx, gdouble cy, gdouble *h, gdouble *s); static void gtk_color_selection_hsv_to_rgb (gdouble h, gdouble s, gdouble v, gdouble *r, gdouble *g, gdouble *b); static void gtk_color_selection_rgb_to_hsv (gdouble r, gdouble g, gdouble b, gdouble *h, gdouble *s, gdouble *v); static GtkVBoxClass *color_selection_parent_class = NULL; static GtkWindowClass *color_selection_dialog_parent_class = NULL; static guint color_selection_signals[LAST_SIGNAL] = {0}; static const gchar *value_index_key = "gtk-value-index"; #define SF GtkSignalFunc scale_val_type scale_vals[NUM_CHANNELS] = { {"Hue:", 0.0, 360.0, 1.00, 10.00, (SF) gtk_color_selection_hsv_updater}, {"Saturation:", 0.0, 1.0, 0.01, 0.01, (SF) gtk_color_selection_hsv_updater}, {"Value:", 0.0, 1.0, 0.01, 0.01, (SF) gtk_color_selection_hsv_updater}, {"Red:", 0.0, 1.0, 0.01, 0.01, (SF) gtk_color_selection_rgb_updater}, {"Green:", 0.0, 1.0, 0.01, 0.01, (SF) gtk_color_selection_rgb_updater}, {"Blue:", 0.0, 1.0, 0.01, 0.01, (SF) gtk_color_selection_rgb_updater}, {"Opacity:", 0.0, 1.0, 0.01, 0.01, (SF) gtk_color_selection_opacity_updater} }; guint gtk_color_selection_get_type (void) { static guint color_selection_type = 0; if (!color_selection_type) { GtkTypeInfo colorsel_info = { "GtkColorSelection", sizeof (GtkColorSelection), sizeof (GtkColorSelectionClass), (GtkClassInitFunc) gtk_color_selection_class_init, (GtkObjectInitFunc) gtk_color_selection_init, (GtkArgSetFunc) NULL, (GtkArgGetFunc) NULL, }; color_selection_type = gtk_type_unique (gtk_vbox_get_type (), &colorsel_info); } return color_selection_type; } static void gtk_color_selection_class_init (GtkColorSelectionClass *klass) { GtkObjectClass *object_class; GtkWidgetClass *widget_class; GtkContainerClass *container_class; object_class = (GtkObjectClass*) klass; widget_class = (GtkWidgetClass*) klass; container_class = (GtkContainerClass*) klass; color_selection_parent_class = gtk_type_class (gtk_vbox_get_type ()); color_selection_signals[COLOR_CHANGED] = gtk_signal_new ("color_changed", GTK_RUN_FIRST, object_class->type, GTK_SIGNAL_OFFSET (GtkColorSelectionClass, color_changed), gtk_signal_default_marshaller, GTK_TYPE_NONE, 0); gtk_object_class_add_signals (object_class, color_selection_signals, LAST_SIGNAL); object_class->finalize = gtk_color_selection_finalize; widget_class->realize = gtk_color_selection_realize; widget_class->unrealize = gtk_color_selection_unrealize; } static void gtk_color_selection_init (GtkColorSelection *colorsel) { GtkWidget *frame, *hbox, *vbox, *hbox2, *label, *table; GtkObject *adj; gint old_mask, n; gchar txt[32]; for (n = RED; n <= OPACITY; n++) colorsel->values[n] = 1.0; RGB_TO_HSV (); for (n = HUE; n <= OPACITY; n++) colorsel->old_values[n] = colorsel->values[n]; colorsel->wheel_gc = NULL; colorsel->value_gc = NULL; colorsel->sample_gc = NULL; colorsel->wheel_buf = NULL; colorsel->value_buf = NULL; colorsel->sample_buf = NULL; colorsel->use_opacity = FALSE; colorsel->timer_active = FALSE; colorsel->policy = GTK_UPDATE_CONTINUOUS; hbox = gtk_hbox_new (FALSE, 5); gtk_container_border_width (GTK_CONTAINER (hbox), 5); gtk_container_add (GTK_CONTAINER (colorsel), hbox); vbox = gtk_vbox_new (FALSE, 5); gtk_container_add (GTK_CONTAINER (hbox), vbox); gtk_widget_show (vbox); hbox2 = gtk_hbox_new (FALSE, 5); gtk_container_add (GTK_CONTAINER (vbox), hbox2); gtk_widget_show (hbox2); colorsel->wheel_area = gtk_preview_new (GTK_PREVIEW_COLOR); old_mask = gtk_widget_get_events(colorsel->wheel_area); gtk_widget_set_events (colorsel->wheel_area, old_mask | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK); gtk_preview_size (GTK_PREVIEW (colorsel->wheel_area), WHEEL_WIDTH, WHEEL_HEIGHT); gtk_preview_set_expand (GTK_PREVIEW (colorsel->wheel_area), TRUE); gtk_container_add (GTK_CONTAINER (hbox2), colorsel->wheel_area); gtk_widget_show (colorsel->wheel_area); old_mask = gtk_widget_get_events (colorsel->wheel_area); gtk_signal_connect (GTK_OBJECT (colorsel->wheel_area), "event", (SF) gtk_color_selection_wheel_events, (gpointer) colorsel->wheel_area); gtk_signal_connect_after (GTK_OBJECT (colorsel->wheel_area), "expose_event", (SF) gtk_color_selection_wheel_events, (gpointer) colorsel->wheel_area); gtk_signal_connect_after (GTK_OBJECT (colorsel->wheel_area), "size_allocate", (SF) gtk_color_selection_wheel_resize, (gpointer) colorsel->wheel_area); gtk_object_set_data (GTK_OBJECT (colorsel->wheel_area), "_GtkColorSelection", (gpointer) colorsel); frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN); gtk_container_border_width (GTK_CONTAINER (frame), 0); gtk_box_pack_start (GTK_BOX (hbox2), frame, FALSE, TRUE, 0); gtk_widget_show (frame); colorsel->value_area = gtk_preview_new (GTK_PREVIEW_COLOR); gtk_preview_size (GTK_PREVIEW (colorsel->value_area), VALUE_WIDTH, VALUE_HEIGHT); gtk_preview_set_expand (GTK_PREVIEW (colorsel->value_area), TRUE); gtk_container_add (GTK_CONTAINER (frame), colorsel->value_area); gtk_widget_show (colorsel->value_area); old_mask = gtk_widget_get_events (colorsel->value_area); gtk_widget_set_events (colorsel->value_area, old_mask | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK); gtk_signal_connect_after (GTK_OBJECT (colorsel->value_area), "expose_event", (SF) gtk_color_selection_value_events, (gpointer) colorsel->value_area); gtk_signal_connect_after (GTK_OBJECT (colorsel->value_area), "size_allocate", (SF) gtk_color_selection_value_resize, (gpointer) colorsel->value_area); gtk_signal_connect (GTK_OBJECT (colorsel->value_area), "event", (SF) gtk_color_selection_value_events, (gpointer) colorsel->value_area); gtk_object_set_data (GTK_OBJECT (colorsel->value_area), "_GtkColorSelection", (gpointer) colorsel); /* New/old color samples */ /* ===================== */ frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN); gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, TRUE, 0); gtk_widget_show (frame); /* colorsel->sample_area_eb = gtk_button_new (); gtk_container_add (GTK_CONTAINER (frame), colorsel->sample_area_eb); gtk_widget_show (colorsel->sample_area_eb); */ colorsel->sample_area = gtk_preview_new (GTK_PREVIEW_COLOR); gtk_preview_size (GTK_PREVIEW (colorsel->sample_area), SAMPLE_WIDTH, SAMPLE_HEIGHT); gtk_preview_set_expand (GTK_PREVIEW (colorsel->sample_area), TRUE); gtk_container_add (GTK_CONTAINER (frame), colorsel->sample_area); gtk_widget_set_events(colorsel->sample_area, gtk_widget_get_events(colorsel->sample_area) | GDK_BUTTON_MOTION_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK); gtk_widget_show (colorsel->sample_area); gtk_signal_connect_after (GTK_OBJECT (colorsel->sample_area), "size_allocate", GTK_SIGNAL_FUNC (gtk_color_selection_sample_resize), colorsel->sample_area); gtk_object_set_data (GTK_OBJECT (colorsel->sample_area), "_GtkColorSelection", (gpointer) colorsel); table = gtk_table_new (NUM_CHANNELS, 3, FALSE); gtk_table_set_col_spacings (GTK_TABLE (table), 3); gtk_box_pack_start (GTK_BOX (hbox), table, FALSE, TRUE, 0); for (n = HUE; n <= OPACITY; n++) { label = gtk_label_new (scale_vals[n].label); gtk_misc_set_alignment (GTK_MISC (label), 1.0, 0.5); gtk_table_attach_defaults (GTK_TABLE (table), label, 0, 1, n, n + 1); adj = gtk_adjustment_new (colorsel->values[n], scale_vals[n].lower, scale_vals[n].upper, scale_vals[n].step_inc, scale_vals[n].page_inc, 0.0); colorsel->scales[n] = gtk_hscale_new (GTK_ADJUSTMENT (adj)); gtk_widget_set_usize (colorsel->scales[n], 128, 0); gtk_scale_set_value_pos (GTK_SCALE (colorsel->scales[n]), GTK_POS_TOP); gtk_range_set_update_policy (GTK_RANGE (colorsel->scales[n]), colorsel->policy); gtk_scale_set_draw_value (GTK_SCALE (colorsel->scales[n]), FALSE); gtk_scale_set_digits (GTK_SCALE (colorsel->scales[n]), 2); gtk_table_attach_defaults (GTK_TABLE (table), colorsel->scales[n], 1, 2, n, n + 1); colorsel->entries[n] = gtk_entry_new (); gtk_widget_set_usize (colorsel->entries[n], 40, 0); sprintf (txt, "%.2f", colorsel->values[n]); gtk_entry_set_text (GTK_ENTRY (colorsel->entries[n]), txt); gtk_table_attach_defaults (GTK_TABLE (table), colorsel->entries[n], 2, 3, n, n + 1); if (n != OPACITY) { gtk_widget_show (label); gtk_widget_show (colorsel->scales[n]); gtk_widget_show (colorsel->entries[n]); } gtk_signal_connect_object (GTK_OBJECT (adj), "value_changed", scale_vals[n].updater, (gpointer) colorsel->scales[n]); gtk_object_set_data (GTK_OBJECT (colorsel->scales[n]), "_GtkColorSelection", (gpointer) colorsel); gtk_object_set_data (GTK_OBJECT (colorsel->scales[n]), value_index_key, (gpointer) n); gtk_signal_connect_object (GTK_OBJECT (colorsel->entries[n]), "changed", scale_vals[n].updater, (gpointer) colorsel->entries[n]); gtk_object_set_data (GTK_OBJECT (colorsel->entries[n]), "_GtkColorSelection", (gpointer) colorsel); gtk_object_set_data (GTK_OBJECT (colorsel->entries[n]), value_index_key, (gpointer) n); } colorsel->opacity_label = label; gtk_widget_show (table); gtk_widget_show (hbox); } GtkWidget * gtk_color_selection_new (void) { GtkColorSelection *colorsel; colorsel = gtk_type_new (gtk_color_selection_get_type ()); return GTK_WIDGET (colorsel); } void gtk_color_selection_set_update_policy (GtkColorSelection *colorsel, GtkUpdateType policy) { gint n; g_return_if_fail (colorsel != NULL); if (policy != colorsel->policy) { colorsel->policy = policy; for (n = 0; n < NUM_CHANNELS; n++) gtk_range_set_update_policy (GTK_RANGE (colorsel->scales[n]), policy); } } void gtk_color_selection_set_color (GtkColorSelection *colorsel, gdouble *color) { gint n, i = 0; g_return_if_fail (colorsel != NULL); g_return_if_fail (GTK_IS_COLOR_SELECTION (colorsel)); if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (colorsel))) gtk_color_selection_draw_wheel_marker (colorsel); for (n = RED; n <= BLUE; n++) { colorsel->old_values[n] = colorsel->values[n]; colorsel->values[n] = color[i++]; } if (colorsel->use_opacity == TRUE) { colorsel->old_values[OPACITY] = colorsel->values[OPACITY]; colorsel->values[OPACITY] = color[i]; } RGB_TO_HSV (); gtk_color_selection_update_inputs (colorsel, RGB_INPUTS | HSV_INPUTS | OPACITY_INPUTS, BOTH); if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (colorsel))) { gtk_color_selection_draw_value_bar (colorsel, FALSE); gtk_color_selection_draw_sample (colorsel, FALSE); gtk_color_selection_draw_wheel_marker (colorsel); } } void gtk_color_selection_get_color (GtkColorSelection *colorsel, gdouble *color) { gint n, i = 0; g_return_if_fail (colorsel != NULL); g_return_if_fail (GTK_IS_COLOR_SELECTION (colorsel)); for (n = RED; n <= BLUE; n++) color[i++] = colorsel->values[n]; if (colorsel->use_opacity == TRUE) color[i] = colorsel->values[OPACITY]; } static void gtk_color_selection_realize (GtkWidget *widget) { GtkColorSelection *colorsel; gchar *type_accept_list[] = {"application/x-color"}; g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_COLOR_SELECTION (widget)); colorsel = GTK_COLOR_SELECTION (widget); if (GTK_WIDGET_CLASS (color_selection_parent_class)->realize) (*GTK_WIDGET_CLASS (color_selection_parent_class)->realize) (widget); gtk_widget_dnd_drag_set (colorsel->sample_area, 1, type_accept_list, 1); gtk_widget_dnd_drop_set (colorsel->sample_area, 1, type_accept_list, 1, 0); gtk_signal_connect_after (GTK_OBJECT (colorsel->sample_area), "drop_data_available_event", GTK_SIGNAL_FUNC (gtk_color_selection_drop_handle), colorsel); gtk_signal_connect_after (GTK_OBJECT (colorsel->sample_area), "drag_request_event", GTK_SIGNAL_FUNC (gtk_color_selection_drag_handle), colorsel); } static void gtk_color_selection_unrealize (GtkWidget *widget) { GtkColorSelection *colorsel; g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_COLOR_SELECTION (widget)); colorsel = GTK_COLOR_SELECTION (widget); if (colorsel->value_gc != NULL) { gdk_gc_unref (colorsel->value_gc); colorsel->value_gc = NULL; } if (colorsel->wheel_gc != NULL) { gdk_gc_unref (colorsel->wheel_gc); colorsel->wheel_gc = NULL; } if (colorsel->sample_gc != NULL) { gdk_gc_unref (colorsel->sample_gc); colorsel->sample_gc = NULL; } (* GTK_WIDGET_CLASS (color_selection_parent_class)->unrealize) (widget); } static void gtk_color_selection_finalize (GtkObject *object) { GtkColorSelection *colorsel; g_return_if_fail (object != NULL); g_return_if_fail (GTK_IS_COLOR_SELECTION (object)); colorsel = GTK_COLOR_SELECTION (object); if (colorsel->wheel_buf != NULL) g_free (colorsel->wheel_buf); if (colorsel->value_buf != NULL) g_free (colorsel->value_buf); if (colorsel->sample_buf != NULL) g_free (colorsel->sample_buf); (*GTK_OBJECT_CLASS (color_selection_parent_class)->finalize) (object); } static void gtk_color_selection_color_changed (GtkColorSelection *colorsel) { gtk_signal_emit (GTK_OBJECT (colorsel), color_selection_signals[COLOR_CHANGED]); } static void gtk_color_selection_update_input (GtkWidget *scale, GtkWidget *entry, gdouble value) { GtkAdjustment *adj; gchar txt[32]; if (scale != NULL) { adj = gtk_range_get_adjustment (GTK_RANGE (scale)); adj->value = (gfloat) value; gtk_signal_handler_block_by_data (GTK_OBJECT (adj), (gpointer) scale); gtk_signal_emit_by_name (GTK_OBJECT (adj), "value_changed"); gtk_range_slider_update (GTK_RANGE (scale)); gtk_signal_handler_unblock_by_data (GTK_OBJECT (adj), (gpointer) scale); } if (entry != NULL) { gtk_signal_handler_block_by_data (GTK_OBJECT (entry), (gpointer) entry); sprintf (txt, "%.2f", value); gtk_entry_set_text (GTK_ENTRY (entry), txt); gtk_signal_handler_unblock_by_data (GTK_OBJECT (entry), (gpointer) entry); } } static void gtk_color_selection_update_inputs (GtkColorSelection *colorsel, gint inputs, gint which) { gint n; switch (which) { case SCALE: if ((inputs & RGB_INPUTS) != 0) for (n = RED; n <= BLUE; n++) gtk_color_selection_update_input (colorsel->scales[n], NULL, colorsel->values[n]); if ((inputs & HSV_INPUTS) != 0) for (n = HUE; n <= VALUE; n++) gtk_color_selection_update_input (colorsel->scales[n], NULL, colorsel->values[n]); if ((inputs & OPACITY_INPUTS) != 0) gtk_color_selection_update_input(colorsel->scales[OPACITY], NULL, colorsel->values[OPACITY]); break; case ENTRY: if ((inputs & RGB_INPUTS) != 0) for (n = RED; n <= BLUE; n++) gtk_color_selection_update_input (NULL, colorsel->entries[n], colorsel->values[n]); if ((inputs & HSV_INPUTS) != 0) for (n = HUE; n <= VALUE; n++) gtk_color_selection_update_input (NULL, colorsel->entries[n], colorsel->values[n]); if ((inputs & OPACITY_INPUTS) != 0) gtk_color_selection_update_input(NULL, colorsel->entries[OPACITY], colorsel->values[OPACITY]); break; default: if ((inputs & RGB_INPUTS) != 0) for (n = RED; n <= BLUE; n++) gtk_color_selection_update_input (colorsel->scales[n], colorsel->entries[n], colorsel->values[n]); if ((inputs & HSV_INPUTS) != 0) for (n = HUE; n <= VALUE; n++) gtk_color_selection_update_input (colorsel->scales[n], colorsel->entries[n], colorsel->values[n]); if ((inputs & OPACITY_INPUTS) != 0) gtk_color_selection_update_input(colorsel->scales[OPACITY], colorsel->entries[OPACITY], colorsel->values[OPACITY]); break; } } static void gtk_color_selection_hsv_updater (GtkWidget *widget, gpointer data) { GtkColorSelection *colorsel; GtkAdjustment *adj; gdouble newvalue; gint i, which = SCALE; if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (widget))) { colorsel = (GtkColorSelection*) gtk_object_get_data (GTK_OBJECT (widget), "_GtkColorSelection"); i = (gint) gtk_object_get_data (GTK_OBJECT (widget), value_index_key); if (GTK_IS_SCALE (widget)) { adj = gtk_range_get_adjustment (GTK_RANGE (GTK_SCALE (widget))); newvalue = (gdouble) adj->value; which = ENTRY; } else newvalue = (gdouble) atof (gtk_entry_get_text (GTK_ENTRY (widget))); if (i == VALUE) { gtk_color_selection_draw_value_marker (colorsel); colorsel->values[i] = newvalue; HSV_TO_RGB (); gtk_color_selection_draw_value_marker (colorsel); } else { gtk_color_selection_draw_wheel_marker (colorsel); colorsel->values[i] = newvalue; HSV_TO_RGB (); gtk_color_selection_draw_wheel_marker (colorsel); gtk_color_selection_draw_value_bar (colorsel, FALSE); } gtk_color_selection_draw_sample (colorsel, FALSE); gtk_color_selection_color_changed (colorsel); gtk_color_selection_update_inputs (colorsel, HSV_INPUTS, which); gtk_color_selection_update_inputs (colorsel, RGB_INPUTS, BOTH); } } static void gtk_color_selection_rgb_updater (GtkWidget *widget, gpointer data) { GtkColorSelection *colorsel; GtkAdjustment *adj; gdouble newvalue; gint i, which = SCALE; if (GTK_WIDGET_DRAWABLE (GTK_WIDGET (widget))) { colorsel = (GtkColorSelection*) gtk_object_get_data (GTK_OBJECT (widget), "_GtkColorSelection"); i = (gint) gtk_object_get_data (GTK_OBJECT (widget), value_index_key); if (GTK_IS_SCALE (widget)) { adj = gtk_range_get_adjustment (GTK_RANGE (GTK_SCALE (widget))); newvalue = (gdouble) adj->value; which = ENTRY; } else newvalue = (gdouble) atof (gtk_entry_get_text (GTK_ENTRY (widget))); gtk_color_selection_draw_wheel_marker (colorsel); colorsel->values[i] = newvalue; RGB_TO_HSV (); gtk_color_selection_draw_wheel_marker (colorsel); gtk_color_selection_draw_value_bar (colorsel, FALSE); gtk_color_selection_draw_sample (colorsel, FALSE); gtk_color_selection_color_changed (colorsel); gtk_color_selection_update_inputs (colorsel, RGB_INPUTS, which); gtk_color_selection_update_inputs (colorsel, HSV_INPUTS, BOTH); } } static void gtk_color_selection_opacity_updater (GtkWidget *widget, gpointer data) { GtkColorSelection *colorsel; GtkAdjustment *adj; colorsel = (GtkColorSelection*) gtk_object_get_data (GTK_OBJECT (widget), "_GtkColorSelection"); if (GTK_IS_SCALE (widget)) { adj = gtk_range_get_adjustment (GTK_RANGE (widget)); colorsel->values[OPACITY] = (gdouble) adj->value; gtk_color_selection_update_input (NULL, colorsel->entries[OPACITY], colorsel->values[OPACITY]); } else { colorsel->values[OPACITY] = (gdouble) atof (gtk_entry_get_text (GTK_ENTRY (widget))); gtk_color_selection_update_input (colorsel->scales[OPACITY], NULL, colorsel->values[OPACITY]); } gtk_color_selection_draw_sample (colorsel, FALSE); gtk_color_selection_color_changed (colorsel); } void gtk_color_selection_set_opacity (GtkColorSelection *colorsel, gint use_opacity) { g_return_if_fail (colorsel != NULL); colorsel->use_opacity = use_opacity; if (use_opacity == FALSE && GTK_WIDGET_VISIBLE (colorsel->scales[OPACITY])) { gtk_widget_hide (colorsel->opacity_label); gtk_widget_hide (colorsel->scales[OPACITY]); gtk_widget_hide (colorsel->entries[OPACITY]); } else if (use_opacity == TRUE && !GTK_WIDGET_VISIBLE (colorsel->scales[OPACITY])) { gtk_widget_show (colorsel->opacity_label); gtk_widget_show (colorsel->scales[OPACITY]); gtk_widget_show (colorsel->entries[OPACITY]); } if (GTK_WIDGET_DRAWABLE (colorsel->sample_area)) gtk_color_selection_draw_sample (colorsel, FALSE); } static void gtk_color_selection_value_resize (GtkWidget *widget, gpointer data) { GtkColorSelection *colorsel; colorsel = (GtkColorSelection*) gtk_object_get_data (GTK_OBJECT (widget), "_GtkColorSelection"); gtk_color_selection_draw_value_bar (colorsel, TRUE); } static void gtk_color_selection_wheel_resize (GtkWidget *widget, gpointer data) { GtkColorSelection *colorsel; colorsel = (GtkColorSelection*) gtk_object_get_data (GTK_OBJECT (widget), "_GtkColorSelection"); gtk_color_selection_draw_wheel (colorsel, TRUE); } static void gtk_color_selection_sample_resize (GtkWidget *widget, gpointer data) { GtkColorSelection *colorsel; colorsel = (GtkColorSelection*) gtk_object_get_data (GTK_OBJECT (widget), "_GtkColorSelection"); gtk_color_selection_draw_sample (colorsel, TRUE); } static void gtk_color_selection_drop_handle (GtkWidget *widget, GdkEvent *event, GtkWidget *thecolorsel) { /* This is currently a gdouble array of the format (I think): use_opacity R G B opacity */ gdouble *v = event->dropdataavailable.data; gtk_color_selection_set_opacity(GTK_COLOR_SELECTION(thecolorsel), (v[0]==1.0)?TRUE:FALSE); gtk_color_selection_set_color(GTK_COLOR_SELECTION(thecolorsel), v + 1); g_free(event->dropdataavailable.data); g_free(event->dropdataavailable.data_type); } static void gtk_color_selection_drag_handle (GtkWidget *widget, GdkEvent *event, GtkWidget *thecolorsel) { gdouble sendvals[(BLUE - RED + 1) + 3]; sendvals[0] = (GTK_COLOR_SELECTION(thecolorsel)->use_opacity)?1.0:0.0; gtk_color_selection_get_color(GTK_COLOR_SELECTION(thecolorsel), sendvals + 1); gtk_widget_dnd_data_set(widget, event, (gpointer)sendvals, sizeof(sendvals)); } static void gtk_color_selection_draw_wheel_marker (GtkColorSelection *colorsel) { gint xpos, ypos; gdk_gc_set_function (colorsel->wheel_gc, GDK_INVERT); xpos = (gint) ((-(gdouble) (colorsel->wheel_area->allocation.width) / 2.0) * colorsel->values[SATURATION] * cos (DEGTORAD ((colorsel->values[HUE] - 90)))) + (colorsel->wheel_area->allocation.width >> 1) - 4; ypos = (gint) (((gdouble) (colorsel->wheel_area->allocation.height) / 2.0) * colorsel->values[SATURATION] * sin (DEGTORAD ((colorsel->values[HUE] - 90)))) + (colorsel->wheel_area->allocation.height >> 1) - 4; gdk_draw_arc (colorsel->wheel_area->window, colorsel->wheel_gc, FALSE, xpos, ypos, 8, 8, 0, 360 * 64); } static void gtk_color_selection_draw_value_marker (GtkColorSelection *colorsel) { gint y; gdk_gc_set_function (colorsel->value_gc, GDK_INVERT); y = (gint) ((gdouble) (colorsel->value_area->allocation.height) * (1.0 - colorsel->values[VALUE])); gdk_draw_line (colorsel->value_area->window, colorsel->value_gc, 0, y, colorsel->value_area->allocation.width, y); } static void gtk_color_selection_update_value (GtkColorSelection *colorsel, gint y) { gtk_color_selection_draw_value_marker (colorsel); if (y < 0) y = 0; else if (y > colorsel->value_area->allocation.height - 1) y = colorsel->value_area->allocation.height - 1; colorsel->values[VALUE] = 1.0 - (gdouble) y / (gdouble) (colorsel->value_area->allocation.height); HSV_TO_RGB (); gtk_color_selection_draw_value_marker (colorsel); gtk_color_selection_draw_sample (colorsel, FALSE); gtk_color_selection_update_input (colorsel->scales[VALUE], colorsel->entries[VALUE], colorsel->values[VALUE]); gtk_color_selection_update_inputs (colorsel, RGB_INPUTS, BOTH); } static void gtk_color_selection_update_wheel (GtkColorSelection *colorsel, gint x, gint y) { gdouble wid, heig; gint res; gtk_color_selection_draw_wheel_marker (colorsel); wid = (gdouble) (colorsel->wheel_area->allocation.width) / 2.0; heig = (gdouble) (colorsel->wheel_area->allocation.height) / 2.0; res = gtk_color_selection_eval_wheel (x, y, wid, heig, &colorsel->values[HUE], &colorsel->values[SATURATION]); HSV_TO_RGB (); gtk_color_selection_draw_wheel_marker (colorsel); gtk_color_selection_draw_value_bar (colorsel, FALSE); gtk_color_selection_draw_sample (colorsel, FALSE); gtk_color_selection_update_inputs (colorsel, RGB_INPUTS | HSV_INPUTS, BOTH); } static gint gtk_color_selection_value_timeout (GtkColorSelection *colorsel) { gint x, y; gdk_window_get_pointer (colorsel->value_area->window, &x, &y, NULL); gtk_color_selection_update_value (colorsel, y); gtk_color_selection_color_changed (colorsel); return (TRUE); } static gint gtk_color_selection_value_events (GtkWidget *area, GdkEvent *event) { GtkColorSelection *colorsel; gint y; colorsel = (GtkColorSelection*) gtk_object_get_data (GTK_OBJECT (area), "_GtkColorSelection"); switch (event->type) { case GDK_MAP: gtk_color_selection_draw_value_marker (colorsel); break; case GDK_EXPOSE: if (colorsel->value_gc == NULL) colorsel->value_gc = gdk_gc_new (colorsel->value_area->window); gtk_color_selection_draw_value_marker (colorsel); break; case GDK_BUTTON_PRESS: gtk_grab_add (area); gtk_color_selection_update_value (colorsel, event->button.y); gtk_color_selection_color_changed (colorsel); break; case GDK_BUTTON_RELEASE: gtk_grab_remove (area); if (colorsel->timer_active == TRUE) gtk_timeout_remove (colorsel->timer_tag); colorsel->timer_active = FALSE; y = event->button.y; if (event->button.window != area->window) gdk_window_get_pointer (area->window, NULL, &y, NULL); gtk_color_selection_update_value (colorsel, y); gtk_color_selection_color_changed (colorsel); break; case GDK_MOTION_NOTIFY: y = event->motion.y; if (event->motion.is_hint || (event->motion.window != area->window)) gdk_window_get_pointer (area->window, NULL, &y, NULL); switch (colorsel->policy) { case GTK_UPDATE_CONTINUOUS: gtk_color_selection_update_value (colorsel, y); gtk_color_selection_color_changed (colorsel); break; case GTK_UPDATE_DELAYED: if (colorsel->timer_active == TRUE) gtk_timeout_remove (colorsel->timer_tag); colorsel->timer_tag = gtk_timeout_add (TIMER_DELAY, (GtkFunction) gtk_color_selection_value_timeout, (gpointer) colorsel); colorsel->timer_active = TRUE; break; default: break; } break; default: break; } return (FALSE); } static gint gtk_color_selection_wheel_timeout (GtkColorSelection *colorsel) { gint x, y; gdk_window_get_pointer (colorsel->wheel_area->window, &x, &y, NULL); gtk_color_selection_update_wheel (colorsel, x, y); gtk_color_selection_color_changed (colorsel); return (TRUE); } static gint gtk_color_selection_wheel_events (GtkWidget *area, GdkEvent *event) { GtkColorSelection *colorsel; gint x, y; colorsel = (GtkColorSelection*) gtk_object_get_data (GTK_OBJECT (area), "_GtkColorSelection"); switch (event->type) { case GDK_MAP: gtk_color_selection_draw_wheel (colorsel, TRUE); gtk_color_selection_draw_wheel_marker (colorsel); gtk_color_selection_draw_sample (colorsel, TRUE); break; case GDK_EXPOSE: if (colorsel->wheel_gc == NULL) colorsel->wheel_gc = gdk_gc_new (colorsel->wheel_area->window); if (colorsel->sample_gc == NULL) colorsel->sample_gc = gdk_gc_new (colorsel->sample_area->window); if (colorsel->value_gc == NULL) colorsel->value_gc = gdk_gc_new (colorsel->value_area->window); gtk_color_selection_draw_wheel_marker (colorsel); gtk_color_selection_draw_wheel_frame (colorsel); break; case GDK_BUTTON_PRESS: gtk_grab_add (area); gtk_color_selection_update_wheel (colorsel, event->button.x, event->button.y); gtk_color_selection_color_changed (colorsel); break; case GDK_BUTTON_RELEASE: gtk_grab_remove (area); if (colorsel->timer_active == TRUE) gtk_timeout_remove (colorsel->timer_tag); colorsel->timer_active = FALSE; x = event->button.x; y = event->button.y; if (event->button.window != area->window) gdk_window_get_pointer (area->window, &x, &y, NULL); gtk_color_selection_update_wheel (colorsel, x, y); gtk_color_selection_color_changed (colorsel); break; case GDK_MOTION_NOTIFY: x = event->motion.x; y = event->motion.y; if (event->motion.is_hint || (event->motion.window != area->window)) gdk_window_get_pointer (area->window, &x, &y, NULL); switch (colorsel->policy) { case GTK_UPDATE_CONTINUOUS: gtk_color_selection_update_wheel (colorsel, x, y); gtk_color_selection_color_changed (colorsel); break; case GTK_UPDATE_DELAYED: if (colorsel->timer_active == TRUE) gtk_timeout_remove (colorsel->timer_tag); colorsel->timer_tag = gtk_timeout_add (TIMER_DELAY, (GtkFunction) gtk_color_selection_wheel_timeout, (gpointer) colorsel); colorsel->timer_active = TRUE; break; default: break; } break; default: break; } return (FALSE); } static void gtk_color_selection_draw_value_bar (GtkColorSelection *colorsel, gint resize) { gint x, y, i, wid, heig, n; gdouble sv, v, c[3]; guchar rc[3]; wid = colorsel->value_area->allocation.width; heig = colorsel->value_area->allocation.height; if (resize) { if (colorsel->value_buf != NULL) g_free (colorsel->value_buf); colorsel->value_buf = g_new(guchar, 3 * wid); } v = 1.0; sv = 1.0 / (gdouble) (heig - 1); for (y = 0; y < heig; y++) { i = 0; gtk_color_selection_hsv_to_rgb (colorsel->values[HUE],colorsel->values[SATURATION],v, &c[0], &c[1], &c[2]); for (n = 0; n < 3; n++) rc[n] = (guchar) (255.0 * c[n]); for (x = 0; x < wid; x++) { for (n = 0; n < 3; n++) colorsel->value_buf[i++] = rc[n]; } gtk_preview_draw_row (GTK_PREVIEW (colorsel->value_area), colorsel->value_buf, 0, y, wid); v -= sv; } gtk_widget_draw (colorsel->value_area, NULL); } static void gtk_color_selection_draw_wheel_frame (GtkColorSelection *colorsel) { GtkStyle *style; gint w, h; style = gtk_widget_get_style (GTK_WIDGET (colorsel)); w = colorsel->wheel_area->allocation.width; h = colorsel->wheel_area->allocation.height; gdk_draw_arc (colorsel->wheel_area->window, style->black_gc, FALSE, 1, 1, w - 1, h - 1, 30 * 64, 180 * 64); gdk_draw_arc (colorsel->wheel_area->window, style->mid_gc[GTK_STATE_NORMAL], FALSE, 0, 0, w, h, 30 * 64, 180 * 64); gdk_draw_arc (colorsel->wheel_area->window, style->bg_gc[GTK_STATE_NORMAL], FALSE, 1, 1, w - 1, h - 1, 210 * 64, 180 * 64); gdk_draw_arc (colorsel->wheel_area->window, style->light_gc[GTK_STATE_NORMAL], FALSE, 0, 0, w, h, 210 * 64, 180 * 64); } static void gtk_color_selection_draw_wheel (GtkColorSelection *colorsel, gint resize) { gint x, y, i, wid, heig, n; gdouble cx, cy, h, s, c[3]; guchar bg[3]; GtkStyle *style = gtk_widget_get_style (GTK_WIDGET (colorsel)); wid = colorsel->wheel_area->allocation.width; heig = colorsel->wheel_area->allocation.height; if (resize) { if (colorsel->wheel_buf != NULL) g_free (colorsel->wheel_buf); colorsel->wheel_buf = g_new(guchar, 3 * wid); } cx = (gdouble) (wid) / 2.0; cy = (gdouble) (heig) / 2.0; bg[0] = style->bg[GTK_STATE_NORMAL].red >> 8; bg[1] = style->bg[GTK_STATE_NORMAL].green >> 8; bg[2] = style->bg[GTK_STATE_NORMAL].blue >> 8; for (y = 0; y < heig; y++) { i = 0; for (x = 0; x < wid; x++) { if (gtk_color_selection_eval_wheel (x, y, cx, cy, &h, &s) == TRUE) { for (n = 0; n < 3; n++) colorsel->wheel_buf[i++] = bg[n]; } else { gtk_color_selection_hsv_to_rgb (h, s, 1.0, &c[0], &c[1], &c[2]); for (n = 0; n < 3; n++) colorsel->wheel_buf[i++] = (guchar) (255.0 * c[n]); } } gtk_preview_draw_row (GTK_PREVIEW (colorsel->wheel_area), colorsel->wheel_buf, 0, y, wid); } gtk_widget_draw (colorsel->wheel_area, NULL); } static void gtk_color_selection_draw_sample (GtkColorSelection *colorsel, gint resize) { gint x, y, i, wid, heig, f, half, n; guchar c[3 * 2], cc[3 * 4], *cp = c; gdouble o, oldo; wid = colorsel->sample_area->allocation.width; heig = colorsel->sample_area->allocation.height; half = wid >> 1; if (resize) { if (colorsel->sample_buf != NULL) g_free (colorsel->sample_buf); colorsel->sample_buf = g_new(guchar, 3 * wid); } i = RED; for (n = 0; n < 3; n++) { c[n] = (guchar) (255.0 * colorsel->old_values[i]); c[n + 3] = (guchar) (255.0 * colorsel->values[i++]); } if (colorsel->use_opacity == TRUE) { o = colorsel->values[OPACITY]; oldo = colorsel->old_values[OPACITY]; for (n = 0; n < 3; n++) { cc[n] = (guchar) ((1.0 - oldo) * 192 + (oldo * (gdouble) c[n])); cc[n + 3] = (guchar) ((1.0 - oldo) * 128 + (oldo * (gdouble) c[n])); cc[n + 6] = (guchar) ((1.0 - o) * 192 + (o * (gdouble) c[n + 3])); cc[n + 9] = (guchar) ((1.0 - o) * 128 + (o * (gdouble) c[n + 3])); } cp = cc; } for (y = 0; y < heig; y++) { i = 0; for (x = 0; x < wid; x++) { if (colorsel->use_opacity) { f = 3 * (((x % 32) < 16) ^ ((y % 32) < 16)); f += (x > half) * 6; } else f = (x > half) * 3; for (n = 0; n < 3; n++) colorsel->sample_buf[i++] = cp[n + f]; } gtk_preview_draw_row (GTK_PREVIEW (colorsel->sample_area), colorsel->sample_buf, 0, y, wid); } gtk_widget_draw (colorsel->sample_area, NULL); } static gint gtk_color_selection_eval_wheel (gint x, gint y, gdouble cx, gdouble cy, gdouble *h, gdouble *s) { gdouble d, r, rx, ry, l; rx = (gdouble) x - cx; ry = (gdouble) y - cy; d = (SQR (cy) * SQR (rx) + SQR (cx) * SQR (ry) - SQR (cx) * SQR (cy)); r = sqrt (SQR (rx) + SQR (ry)); if (r != 0.0) *h = atan2 (rx / r, ry / r); else *h = 0.0; l = sqrt (SQR ((cx * cos (*h + 0.5 * M_PI))) + SQR ((cy * sin (*h + 0.5 * M_PI)))); *s = r / l; *h = 360.0 * (*h) / (2.0 * M_PI) + 180; if (*s == 0.0) *s = 0.00001; else if (*s > 1.0) *s = 1.0; return ((d > 0.0)); } static void gtk_color_selection_hsv_to_rgb (gdouble h, gdouble s, gdouble v, gdouble *r, gdouble *g, gdouble *b) { gint i; gdouble f, w, q, t; if (s == 0.0) s = 0.000001; if (h == -1.0) { *r = v; *g = v; *b = v; } else { if (h == 360.0) h = 0.0; h = h / 60.0; i = (gint) h; f = h - i; w = v * (1.0 - s); q = v * (1.0 - (s * f)); t = v * (1.0 - (s * (1.0 - f))); switch (i) { case 0: *r = v; *g = t; *b = w; break; case 1: *r = q; *g = v; *b = w; break; case 2: *r = w; *g = v; *b = t; break; case 3: *r = w; *g = q; *b = v; break; case 4: *r = t; *g = w; *b = v; break; case 5: *r = v; *g = w; *b = q; break; } } } static void gtk_color_selection_rgb_to_hsv (gdouble r, gdouble g, gdouble b, gdouble *h, gdouble *s, gdouble *v) { double max, min, delta; max = r; if (g > max) max = g; if (b > max) max = b; min = r; if (g < min) min = g; if (b < min) min = b; *v = max; if (max != 0.0) *s = (max - min) / max; else *s = 0.0; if (*s == 0.0) *h = -1.0; else { delta = max - min; if (r == max) *h = (g - b) / delta; else if (g == max) *h = 2.0 + (b - r) / delta; else if (b == max) *h = 4.0 + (r - g) / delta; *h = *h * 60.0; if (*h < 0.0) *h = *h + 360; } } /***************************/ /* GtkColorSelectionDialog */ /***************************/ guint gtk_color_selection_dialog_get_type (void) { static guint color_selection_dialog_type = 0; if (!color_selection_dialog_type) { GtkTypeInfo colorsel_diag_info = { "GtkColorSelectionDialog", sizeof (GtkColorSelectionDialog), sizeof (GtkColorSelectionDialogClass), (GtkClassInitFunc) gtk_color_selection_dialog_class_init, (GtkObjectInitFunc) gtk_color_selection_dialog_init, (GtkArgSetFunc) NULL, (GtkArgGetFunc) NULL, }; color_selection_dialog_type = gtk_type_unique (gtk_window_get_type (), &colorsel_diag_info); } return color_selection_dialog_type; } static void gtk_color_selection_dialog_class_init (GtkColorSelectionDialogClass *klass) { GtkObjectClass *object_class; object_class = (GtkObjectClass*) klass; color_selection_dialog_parent_class = gtk_type_class (gtk_window_get_type ()); } static void gtk_color_selection_dialog_init (GtkColorSelectionDialog *colorseldiag) { GtkWidget *action_area, *frame; colorseldiag->main_vbox = gtk_vbox_new (FALSE, 10); gtk_container_border_width (GTK_CONTAINER (colorseldiag), 10); gtk_container_add (GTK_CONTAINER (colorseldiag), colorseldiag->main_vbox); gtk_widget_show (colorseldiag->main_vbox); frame = gtk_frame_new (NULL); gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN); gtk_container_add (GTK_CONTAINER (colorseldiag->main_vbox), frame); gtk_widget_show (frame); colorseldiag->colorsel = gtk_color_selection_new (); gtk_container_add (GTK_CONTAINER (frame), colorseldiag->colorsel); gtk_widget_show (colorseldiag->colorsel); action_area = gtk_hbutton_box_new (); gtk_button_box_set_layout(GTK_BUTTON_BOX(action_area), GTK_BUTTONBOX_END); gtk_button_box_set_spacing(GTK_BUTTON_BOX(action_area), 5); gtk_box_pack_end (GTK_BOX (colorseldiag->main_vbox), action_area, FALSE, FALSE, 0); gtk_widget_show (action_area); colorseldiag->ok_button = gtk_button_new_with_label ("OK"); GTK_WIDGET_SET_FLAGS (colorseldiag->ok_button, GTK_CAN_DEFAULT); gtk_box_pack_start (GTK_BOX (action_area), colorseldiag->ok_button, TRUE, TRUE, 0); gtk_widget_grab_default (colorseldiag->ok_button); gtk_widget_show (colorseldiag->ok_button); colorseldiag->cancel_button = gtk_button_new_with_label ("Cancel"); GTK_WIDGET_SET_FLAGS (colorseldiag->cancel_button, GTK_CAN_DEFAULT); gtk_box_pack_start (GTK_BOX (action_area), colorseldiag->cancel_button, TRUE, TRUE, 0); gtk_widget_show (colorseldiag->cancel_button); colorseldiag->help_button = gtk_button_new_with_label ("Help"); GTK_WIDGET_SET_FLAGS (colorseldiag->help_button, GTK_CAN_DEFAULT); gtk_box_pack_start (GTK_BOX (action_area), colorseldiag->help_button, TRUE, TRUE, 0); gtk_widget_show (colorseldiag->help_button); } GtkWidget * gtk_color_selection_dialog_new (const gchar *title) { GtkColorSelectionDialog *colorseldiag; colorseldiag = gtk_type_new (gtk_color_selection_dialog_get_type ()); gtk_window_set_title (GTK_WINDOW (colorseldiag), title); return GTK_WIDGET (colorseldiag); }