forked from AuroraMiddleware/gtk
2072f9268d
2004-05-07 Matthias Clasen <mclasen@redhat.com> * gtk/gtkhsv.c: Draw focus indication in the color wheel using standard focus style. (#63071, Bill Haneman, idea for new style by Owen Taylor) * gtk/gtkstyle.c (gtk_default_draw_focus): Support drawing on focus on the colorwheel via details.
1807 lines
38 KiB
C
1807 lines
38 KiB
C
/* HSV color selector for GTK+
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*
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* Copyright (C) 1999 The Free Software Foundation
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*
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* Authors: Simon Budig <Simon.Budig@unix-ag.org> (original code)
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* Federico Mena-Quintero <federico@gimp.org> (cleanup for GTK+)
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* Jonathan Blandford <jrb@redhat.com> (cleanup for GTK+)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <config.h>
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#include <math.h>
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#include <string.h>
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#include "gtkhsv.h"
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#include "gdk/gdkkeysyms.h"
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#include "gtkbindings.h"
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#include "gtkcontainer.h"
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#include "gtkmarshalers.h"
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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/* Default width/height */
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#define DEFAULT_SIZE 100
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/* Default ring width */
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#define DEFAULT_RING_WIDTH 10
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/* Dragging modes */
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typedef enum {
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DRAG_NONE,
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DRAG_H,
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DRAG_SV
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} DragMode;
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/* Private part of the GtkHSV structure */
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typedef struct {
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/* Color value */
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double h;
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double s;
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double v;
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/* Size and ring width */
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int size;
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int ring_width;
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/* Window for capturing events */
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GdkWindow *window;
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/* GC for drawing */
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GdkGC *gc;
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/* Dragging mode */
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DragMode mode;
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guint focus_on_ring : 1;
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} HSVPrivate;
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/* Signal IDs */
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enum {
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CHANGED,
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MOVE,
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LAST_SIGNAL
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};
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static void gtk_hsv_class_init (GtkHSVClass *class);
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static void gtk_hsv_init (GtkHSV *hsv);
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static void gtk_hsv_destroy (GtkObject *object);
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static void gtk_hsv_map (GtkWidget *widget);
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static void gtk_hsv_unmap (GtkWidget *widget);
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static void gtk_hsv_realize (GtkWidget *widget);
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static void gtk_hsv_unrealize (GtkWidget *widget);
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static void gtk_hsv_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_hsv_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gint gtk_hsv_button_press (GtkWidget *widget,
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GdkEventButton *event);
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static gint gtk_hsv_button_release (GtkWidget *widget,
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GdkEventButton *event);
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static gint gtk_hsv_motion (GtkWidget *widget,
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GdkEventMotion *event);
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static gint gtk_hsv_expose (GtkWidget *widget,
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GdkEventExpose *event);
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static gboolean gtk_hsv_focus (GtkWidget *widget,
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GtkDirectionType direction);
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static void gtk_hsv_move (GtkHSV *hsv,
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GtkDirectionType dir);
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static GdkGC * gtk_hsv_get_focus_gc (GtkHSV *hsv,
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gint *line_width);
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static guint hsv_signals[LAST_SIGNAL];
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static GtkWidgetClass *parent_class;
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/**
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* gtk_hsv_get_type:
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* @void:
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*
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* Registers the &GtkHSV class if necessary, and returns the type ID associated
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* to it.
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*
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* Return value: The type ID of the &GtkHSV class.
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**/
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GType
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gtk_hsv_get_type (void)
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{
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static GType hsv_type = 0;
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if (!hsv_type) {
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static const GTypeInfo hsv_info = {
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sizeof (GtkHSVClass),
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NULL, /* base_init */
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NULL, /* base_finalize */
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(GClassInitFunc) gtk_hsv_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GtkHSV),
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0, /* n_preallocs */
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(GInstanceInitFunc) gtk_hsv_init,
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};
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hsv_type = g_type_register_static (GTK_TYPE_WIDGET, "GtkHSV",
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&hsv_info, 0);
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}
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return hsv_type;
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}
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/* Class initialization function for the HSV color selector */
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static void
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gtk_hsv_class_init (GtkHSVClass *class)
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{
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GtkObjectClass *object_class;
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GtkWidgetClass *widget_class;
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GtkHSVClass *hsv_class;
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GtkBindingSet *binding_set;
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object_class = (GtkObjectClass *) class;
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widget_class = (GtkWidgetClass *) class;
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hsv_class = GTK_HSV_CLASS (class);
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parent_class = g_type_class_peek_parent (class);
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object_class->destroy = gtk_hsv_destroy;
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widget_class->map = gtk_hsv_map;
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widget_class->unmap = gtk_hsv_unmap;
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widget_class->realize = gtk_hsv_realize;
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widget_class->unrealize = gtk_hsv_unrealize;
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widget_class->size_request = gtk_hsv_size_request;
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widget_class->size_allocate = gtk_hsv_size_allocate;
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widget_class->button_press_event = gtk_hsv_button_press;
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widget_class->button_release_event = gtk_hsv_button_release;
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widget_class->motion_notify_event = gtk_hsv_motion;
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widget_class->expose_event = gtk_hsv_expose;
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widget_class->focus = gtk_hsv_focus;
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hsv_class->move = gtk_hsv_move;
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hsv_signals[CHANGED] =
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g_signal_new ("changed",
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G_OBJECT_CLASS_TYPE (object_class),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GtkHSVClass, changed),
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NULL, NULL,
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_gtk_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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hsv_signals[MOVE] =
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g_signal_new ("move",
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G_OBJECT_CLASS_TYPE (object_class),
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G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
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G_STRUCT_OFFSET (GtkHSVClass, move),
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NULL, NULL,
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_gtk_marshal_VOID__ENUM,
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G_TYPE_NONE, 1,
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GTK_TYPE_DIRECTION_TYPE);
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binding_set = gtk_binding_set_by_class (class);
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gtk_binding_entry_add_signal (binding_set, GDK_Up, 0,
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"move", 1,
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G_TYPE_ENUM, GTK_DIR_UP);
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gtk_binding_entry_add_signal (binding_set, GDK_KP_Up, 0,
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"move", 1,
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G_TYPE_ENUM, GTK_DIR_UP);
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gtk_binding_entry_add_signal (binding_set, GDK_Down, 0,
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"move", 1,
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G_TYPE_ENUM, GTK_DIR_DOWN);
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gtk_binding_entry_add_signal (binding_set, GDK_KP_Down, 0,
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"move", 1,
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G_TYPE_ENUM, GTK_DIR_DOWN);
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gtk_binding_entry_add_signal (binding_set, GDK_Right, 0,
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"move", 1,
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G_TYPE_ENUM, GTK_DIR_RIGHT);
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gtk_binding_entry_add_signal (binding_set, GDK_KP_Right, 0,
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"move", 1,
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G_TYPE_ENUM, GTK_DIR_RIGHT);
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gtk_binding_entry_add_signal (binding_set, GDK_Left, 0,
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"move", 1,
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G_TYPE_ENUM, GTK_DIR_LEFT);
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gtk_binding_entry_add_signal (binding_set, GDK_KP_Left, 0,
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"move", 1,
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G_TYPE_ENUM, GTK_DIR_LEFT);
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}
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/* Object initialization function for the HSV color selector */
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static void
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gtk_hsv_init (GtkHSV *hsv)
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{
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HSVPrivate *priv;
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priv = g_new0 (HSVPrivate, 1);
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hsv->priv = priv;
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GTK_WIDGET_SET_FLAGS (hsv, GTK_NO_WINDOW);
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GTK_WIDGET_SET_FLAGS (hsv, GTK_CAN_FOCUS);
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priv->h = 0.0;
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priv->s = 0.0;
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priv->v = 0.0;
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priv->size = DEFAULT_SIZE;
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priv->ring_width = DEFAULT_RING_WIDTH;
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}
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/* Destroy handler for the HSV color selector */
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static void
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gtk_hsv_destroy (GtkObject *object)
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{
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GtkHSV *hsv;
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g_return_if_fail (GTK_IS_HSV (object));
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hsv = GTK_HSV (object);
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if (hsv->priv)
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{
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g_free (hsv->priv);
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hsv->priv = NULL;
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}
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GTK_OBJECT_CLASS (parent_class)->destroy (object);
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}
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/* Default signal handlers */
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/* Map handler for the HSV color selector */
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static void
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gtk_hsv_map (GtkWidget *widget)
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{
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GtkHSV *hsv;
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HSVPrivate *priv;
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hsv = GTK_HSV (widget);
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priv = hsv->priv;
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GTK_WIDGET_CLASS (parent_class)->map (widget);
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gdk_window_show (priv->window);
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}
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/* Unmap handler for the HSV color selector */
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static void
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gtk_hsv_unmap (GtkWidget *widget)
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{
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GtkHSV *hsv;
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HSVPrivate *priv;
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hsv = GTK_HSV (widget);
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priv = hsv->priv;
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gdk_window_hide (priv->window);
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GTK_WIDGET_CLASS (parent_class)->unmap (widget);
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}
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/* Realize handler for the HSV color selector */
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static void
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gtk_hsv_realize (GtkWidget *widget)
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{
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GtkHSV *hsv;
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HSVPrivate *priv;
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GdkWindowAttr attr;
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int attr_mask;
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GdkWindow *parent_window;
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hsv = GTK_HSV (widget);
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priv = hsv->priv;
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GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
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/* Create window */
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attr.window_type = GDK_WINDOW_CHILD;
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attr.x = widget->allocation.x;
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attr.y = widget->allocation.y;
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attr.width = widget->allocation.width;
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attr.height = widget->allocation.height;
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attr.wclass = GDK_INPUT_ONLY;
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attr.event_mask = gtk_widget_get_events (widget);
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attr.event_mask |= (GDK_KEY_PRESS_MASK
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| GDK_BUTTON_PRESS_MASK
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| GDK_BUTTON_RELEASE_MASK
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| GDK_POINTER_MOTION_MASK
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| GDK_ENTER_NOTIFY_MASK
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| GDK_LEAVE_NOTIFY_MASK);
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attr_mask = GDK_WA_X | GDK_WA_Y;
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parent_window = gtk_widget_get_parent_window (widget);
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widget->window = parent_window;
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g_object_ref (widget->window);
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priv->window = gdk_window_new (parent_window, &attr, attr_mask);
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gdk_window_set_user_data (priv->window, hsv);
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widget->style = gtk_style_attach (widget->style, widget->window);
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/* Create GC */
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priv->gc = gdk_gc_new (parent_window);
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}
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/* Unrealize handler for the HSV color selector */
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static void
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gtk_hsv_unrealize (GtkWidget *widget)
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{
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GtkHSV *hsv;
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HSVPrivate *priv;
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hsv = GTK_HSV (widget);
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priv = hsv->priv;
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gdk_window_set_user_data (priv->window, NULL);
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gdk_window_destroy (priv->window);
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priv->window = NULL;
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g_object_unref (priv->gc);
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priv->gc = NULL;
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if (GTK_WIDGET_CLASS (parent_class)->unrealize)
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GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
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}
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/* Size_request handler for the HSV color selector */
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static void
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gtk_hsv_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GtkHSV *hsv = GTK_HSV (widget);
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HSVPrivate *priv = hsv->priv;
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gint focus_width;
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gint focus_pad;
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gtk_widget_style_get (widget,
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"focus-line-width", &focus_width,
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"focus-padding", &focus_pad,
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NULL);
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requisition->width = priv->size + 2 * (focus_width + focus_pad);
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requisition->height = priv->size + 2 * (focus_width + focus_pad);
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}
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/* Size_allocate handler for the HSV color selector */
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static void
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gtk_hsv_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkHSV *hsv;
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HSVPrivate *priv;
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hsv = GTK_HSV (widget);
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priv = hsv->priv;
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widget->allocation = *allocation;
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if (GTK_WIDGET_REALIZED (widget))
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gdk_window_move_resize (priv->window,
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allocation->x,
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allocation->y,
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allocation->width,
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allocation->height);
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}
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/* Utility functions */
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#define INTENSITY(r, g, b) ((r) * 0.30 + (g) * 0.59 + (b) * 0.11)
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/* Converts from HSV to RGB */
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static void
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hsv_to_rgb (gdouble *h,
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gdouble *s,
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gdouble *v)
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{
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gdouble hue, saturation, value;
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gdouble f, p, q, t;
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if (*s == 0.0)
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{
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*h = *v;
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*s = *v;
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*v = *v; /* heh */
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}
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else
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{
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hue = *h * 6.0;
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saturation = *s;
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value = *v;
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if (hue == 6.0)
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hue = 0.0;
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f = hue - (int) hue;
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p = value * (1.0 - saturation);
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q = value * (1.0 - saturation * f);
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t = value * (1.0 - saturation * (1.0 - f));
|
||
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switch ((int) hue)
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{
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case 0:
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*h = value;
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*s = t;
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||
*v = p;
|
||
break;
|
||
|
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case 1:
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*h = q;
|
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*s = value;
|
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*v = p;
|
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break;
|
||
|
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case 2:
|
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*h = p;
|
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*s = value;
|
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*v = t;
|
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break;
|
||
|
||
case 3:
|
||
*h = p;
|
||
*s = q;
|
||
*v = value;
|
||
break;
|
||
|
||
case 4:
|
||
*h = t;
|
||
*s = p;
|
||
*v = value;
|
||
break;
|
||
|
||
case 5:
|
||
*h = value;
|
||
*s = p;
|
||
*v = q;
|
||
break;
|
||
|
||
default:
|
||
g_assert_not_reached ();
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Converts from RGB to HSV */
|
||
static void
|
||
rgb_to_hsv (gdouble *r,
|
||
gdouble *g,
|
||
gdouble *b)
|
||
{
|
||
gdouble red, green, blue;
|
||
gdouble h, s, v;
|
||
gdouble min, max;
|
||
gdouble delta;
|
||
|
||
red = *r;
|
||
green = *g;
|
||
blue = *b;
|
||
|
||
h = 0.0;
|
||
|
||
if (red > green)
|
||
{
|
||
if (red > blue)
|
||
max = red;
|
||
else
|
||
max = blue;
|
||
|
||
if (green < blue)
|
||
min = green;
|
||
else
|
||
min = blue;
|
||
}
|
||
else
|
||
{
|
||
if (green > blue)
|
||
max = green;
|
||
else
|
||
max = blue;
|
||
|
||
if (red < blue)
|
||
min = red;
|
||
else
|
||
min = blue;
|
||
}
|
||
|
||
v = max;
|
||
|
||
if (max != 0.0)
|
||
s = (max - min) / max;
|
||
else
|
||
s = 0.0;
|
||
|
||
if (s == 0.0)
|
||
h = 0.0;
|
||
else
|
||
{
|
||
delta = max - min;
|
||
|
||
if (red == max)
|
||
h = (green - blue) / delta;
|
||
else if (green == max)
|
||
h = 2 + (blue - red) / delta;
|
||
else if (blue == max)
|
||
h = 4 + (red - green) / delta;
|
||
|
||
h /= 6.0;
|
||
|
||
if (h < 0.0)
|
||
h += 1.0;
|
||
else if (h > 1.0)
|
||
h -= 1.0;
|
||
}
|
||
|
||
*r = h;
|
||
*g = s;
|
||
*b = v;
|
||
}
|
||
|
||
/* Computes the vertices of the saturation/value triangle */
|
||
static void
|
||
compute_triangle (GtkHSV *hsv,
|
||
gint *hx,
|
||
gint *hy,
|
||
gint *sx,
|
||
gint *sy,
|
||
gint *vx,
|
||
gint *vy)
|
||
{
|
||
HSVPrivate *priv;
|
||
gdouble center;
|
||
gdouble inner, outer;
|
||
gdouble angle;
|
||
|
||
priv = hsv->priv;
|
||
|
||
center = GTK_WIDGET (hsv)->requisition.width / 2.0;
|
||
outer = priv->size / 2.0;
|
||
inner = outer - priv->ring_width;
|
||
angle = priv->h * 2.0 * G_PI;
|
||
|
||
*hx = floor (center + cos (angle) * inner + 0.5);
|
||
*hy = floor (center - sin (angle) * inner + 0.5);
|
||
*sx = floor (center + cos (angle + 2.0 * G_PI / 3.0) * inner + 0.5);
|
||
*sy = floor (center - sin (angle + 2.0 * G_PI / 3.0) * inner + 0.5);
|
||
*vx = floor (center + cos (angle + 4.0 * G_PI / 3.0) * inner + 0.5);
|
||
*vy = floor (center - sin (angle + 4.0 * G_PI / 3.0) * inner + 0.5);
|
||
}
|
||
|
||
/* Computes whether a point is inside the hue ring */
|
||
static gboolean
|
||
is_in_ring (GtkHSV *hsv,
|
||
gdouble x,
|
||
gdouble y)
|
||
{
|
||
HSVPrivate *priv;
|
||
gdouble dx, dy, dist;
|
||
gdouble center, inner, outer;
|
||
|
||
priv = hsv->priv;
|
||
|
||
center = priv->size / 2.0;
|
||
outer = priv->size / 2.0;
|
||
inner = outer - priv->ring_width;
|
||
|
||
dx = x - center;
|
||
dy = center - y;
|
||
dist = dx * dx + dy * dy;
|
||
|
||
return (dist >= inner * inner && dist <= outer * outer);
|
||
}
|
||
|
||
/* Computes a saturation/value pair based on the mouse coordinates */
|
||
static void
|
||
compute_sv (GtkHSV *hsv,
|
||
gdouble x,
|
||
gdouble y,
|
||
gdouble *s,
|
||
gdouble *v)
|
||
{
|
||
HSVPrivate *priv;
|
||
int ihx, ihy, isx, isy, ivx, ivy;
|
||
double hx, hy, sx, sy, vx, vy;
|
||
double center;
|
||
|
||
priv = hsv->priv;
|
||
|
||
compute_triangle (hsv, &ihx, &ihy, &isx, &isy, &ivx, &ivy);
|
||
center = GTK_WIDGET (hsv)->requisition.width / 2.0;
|
||
hx = ihx - center;
|
||
hy = center - ihy;
|
||
sx = isx - center;
|
||
sy = center - isy;
|
||
vx = ivx - center;
|
||
vy = center - ivy;
|
||
x -= center;
|
||
y = center - y;
|
||
|
||
if (vx * (x - sx) + vy * (y - sy) < 0.0)
|
||
{
|
||
*s = 1.0;
|
||
*v = (((x - sx) * (hx - sx) + (y - sy) * (hy-sy))
|
||
/ ((hx - sx) * (hx - sx) + (hy - sy) * (hy - sy)));
|
||
|
||
if (*v < 0.0)
|
||
*v = 0.0;
|
||
else if (*v > 1.0)
|
||
*v = 1.0;
|
||
}
|
||
else if (hx * (x - sx) + hy * (y - sy) < 0.0)
|
||
{
|
||
*s = 0.0;
|
||
*v = (((x - sx) * (vx - sx) + (y - sy) * (vy - sy))
|
||
/ ((vx - sx) * (vx - sx) + (vy - sy) * (vy - sy)));
|
||
|
||
if (*v < 0.0)
|
||
*v = 0.0;
|
||
else if (*v > 1.0)
|
||
*v = 1.0;
|
||
}
|
||
else if (sx * (x - hx) + sy * (y - hy) < 0.0)
|
||
{
|
||
*v = 1.0;
|
||
*s = (((x - vx) * (hx - vx) + (y - vy) * (hy - vy)) /
|
||
((hx - vx) * (hx - vx) + (hy - vy) * (hy - vy)));
|
||
|
||
if (*s < 0.0)
|
||
*s = 0.0;
|
||
else if (*s > 1.0)
|
||
*s = 1.0;
|
||
}
|
||
else
|
||
{
|
||
*v = (((x - sx) * (hy - vy) - (y - sy) * (hx - vx))
|
||
/ ((vx - sx) * (hy - vy) - (vy - sy) * (hx - vx)));
|
||
|
||
if (*v<= 0.0)
|
||
{
|
||
*v = 0.0;
|
||
*s = 0.0;
|
||
}
|
||
else
|
||
{
|
||
if (*v > 1.0)
|
||
*v = 1.0;
|
||
|
||
if (fabs (hy - vy) < fabs (hx - vx))
|
||
*s = (x - sx - *v * (vx - sx)) / (*v * (hx - vx));
|
||
else
|
||
*s = (y - sy - *v * (vy - sy)) / (*v * (hy - vy));
|
||
|
||
if (*s < 0.0)
|
||
*s = 0.0;
|
||
else if (*s > 1.0)
|
||
*s = 1.0;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Computes whether a point is inside the saturation/value triangle */
|
||
static gboolean
|
||
is_in_triangle (GtkHSV *hsv,
|
||
gdouble x,
|
||
gdouble y)
|
||
{
|
||
int hx, hy, sx, sy, vx, vy;
|
||
double det, s, v;
|
||
|
||
compute_triangle (hsv, &hx, &hy, &sx, &sy, &vx, &vy);
|
||
|
||
det = (vx - sx) * (hy - sy) - (vy - sy) * (hx - sx);
|
||
|
||
s = ((x - sx) * (hy - sy) - (y - sy) * (hx - sx)) / det;
|
||
v = ((vx - sx) * (y - sy) - (vy - sy) * (x - sx)) / det;
|
||
|
||
return (s >= 0.0 && v >= 0.0 && s + v <= 1.0);
|
||
}
|
||
|
||
/* Computes a value based on the mouse coordinates */
|
||
static double
|
||
compute_v (GtkHSV *hsv,
|
||
gdouble x,
|
||
gdouble y)
|
||
{
|
||
HSVPrivate *priv;
|
||
double center;
|
||
double dx, dy;
|
||
double angle;
|
||
|
||
priv = hsv->priv;
|
||
|
||
center = GTK_WIDGET (hsv)->requisition.width / 2.0;
|
||
dx = x - center;
|
||
dy = center - y;
|
||
|
||
angle = atan2 (dy, dx);
|
||
if (angle < 0.0)
|
||
angle += 2.0 * G_PI;
|
||
|
||
return angle / (2.0 * G_PI);
|
||
}
|
||
|
||
/* Event handlers */
|
||
|
||
static void
|
||
set_cross_grab (GtkHSV *hsv,
|
||
guint32 time)
|
||
{
|
||
HSVPrivate *priv;
|
||
GdkCursor *cursor;
|
||
|
||
priv = hsv->priv;
|
||
|
||
cursor = gdk_cursor_new_for_display (gtk_widget_get_display (GTK_WIDGET (hsv)),
|
||
GDK_CROSSHAIR);
|
||
gdk_pointer_grab (priv->window, FALSE,
|
||
(GDK_POINTER_MOTION_MASK
|
||
| GDK_POINTER_MOTION_HINT_MASK
|
||
| GDK_BUTTON_RELEASE_MASK),
|
||
NULL,
|
||
cursor,
|
||
time);
|
||
gdk_cursor_unref (cursor);
|
||
}
|
||
|
||
/* Button_press_event handler for the HSV color selector */
|
||
static gint
|
||
gtk_hsv_button_press (GtkWidget *widget,
|
||
GdkEventButton *event)
|
||
{
|
||
GtkHSV *hsv;
|
||
HSVPrivate *priv;
|
||
double x, y;
|
||
|
||
hsv = GTK_HSV (widget);
|
||
priv = hsv->priv;
|
||
|
||
if (priv->mode != DRAG_NONE || event->button != 1)
|
||
return FALSE;
|
||
|
||
x = event->x;
|
||
y = event->y;
|
||
|
||
if (is_in_ring (hsv, x, y))
|
||
{
|
||
priv->mode = DRAG_H;
|
||
set_cross_grab (hsv, event->time);
|
||
|
||
gtk_hsv_set_color (hsv,
|
||
compute_v (hsv, x, y),
|
||
priv->s,
|
||
priv->v);
|
||
|
||
gtk_widget_grab_focus (widget);
|
||
priv->focus_on_ring = TRUE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
if (is_in_triangle (hsv, x, y))
|
||
{
|
||
gdouble s, v;
|
||
|
||
priv->mode = DRAG_SV;
|
||
set_cross_grab (hsv, event->time);
|
||
|
||
compute_sv (hsv, x, y, &s, &v);
|
||
gtk_hsv_set_color (hsv, priv->h, s, v);
|
||
|
||
gtk_widget_grab_focus (widget);
|
||
priv->focus_on_ring = FALSE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
/* Button_release_event handler for the HSV color selector */
|
||
static gint
|
||
gtk_hsv_button_release (GtkWidget *widget,
|
||
GdkEventButton *event)
|
||
{
|
||
GtkHSV *hsv;
|
||
HSVPrivate *priv;
|
||
DragMode mode;
|
||
gdouble x, y;
|
||
|
||
hsv = GTK_HSV (widget);
|
||
priv = hsv->priv;
|
||
|
||
if (priv->mode == DRAG_NONE || event->button != 1)
|
||
return FALSE;
|
||
|
||
/* Set the drag mode to DRAG_NONE so that signal handlers for "catched"
|
||
* can see that this is the final color state.
|
||
*/
|
||
|
||
mode = priv->mode;
|
||
priv->mode = DRAG_NONE;
|
||
|
||
x = event->x;
|
||
y = event->y;
|
||
|
||
if (mode == DRAG_H)
|
||
gtk_hsv_set_color (hsv, compute_v (hsv, x, y), priv->s, priv->v);
|
||
else if (mode == DRAG_SV) {
|
||
double s, v;
|
||
|
||
compute_sv (hsv, x, y, &s, &v);
|
||
gtk_hsv_set_color (hsv, priv->h, s, v);
|
||
} else
|
||
g_assert_not_reached ();
|
||
|
||
gdk_display_pointer_ungrab (gdk_drawable_get_display (event->window),
|
||
event->time);
|
||
return TRUE;
|
||
}
|
||
|
||
/* Motion_notify_event handler for the HSV color selector */
|
||
static gint
|
||
gtk_hsv_motion (GtkWidget *widget,
|
||
GdkEventMotion *event)
|
||
{
|
||
GtkHSV *hsv;
|
||
HSVPrivate *priv;
|
||
double x, y;
|
||
gint ix, iy;
|
||
GdkModifierType mods;
|
||
|
||
hsv = GTK_HSV (widget);
|
||
priv = hsv->priv;
|
||
|
||
if (priv->mode == DRAG_NONE)
|
||
return FALSE;
|
||
|
||
if (event->is_hint)
|
||
{
|
||
gdk_window_get_pointer (priv->window, &ix, &iy, &mods);
|
||
x = ix;
|
||
y = iy;
|
||
}
|
||
else
|
||
{
|
||
x = event->x;
|
||
y = event->y;
|
||
}
|
||
|
||
if (priv->mode == DRAG_H)
|
||
{
|
||
gtk_hsv_set_color (hsv, compute_v (hsv, x, y), priv->s, priv->v);
|
||
return TRUE;
|
||
}
|
||
else if (priv->mode == DRAG_SV)
|
||
{
|
||
double s, v;
|
||
|
||
compute_sv (hsv, x, y, &s, &v);
|
||
gtk_hsv_set_color (hsv, priv->h, s, v);
|
||
return TRUE;
|
||
}
|
||
|
||
g_assert_not_reached ();
|
||
return FALSE;
|
||
}
|
||
|
||
|
||
/* Redrawing */
|
||
|
||
/* Paints the hue ring */
|
||
static void
|
||
paint_ring (GtkHSV *hsv,
|
||
GdkDrawable *drawable,
|
||
gint x,
|
||
gint y,
|
||
gint width,
|
||
gint height)
|
||
{
|
||
GtkWidget *widget = GTK_WIDGET (hsv);
|
||
HSVPrivate *priv;
|
||
int xx, yy;
|
||
gdouble dx, dy, dist;
|
||
gdouble center;
|
||
gdouble inner, outer;
|
||
guchar *buf, *p;
|
||
gdouble angle;
|
||
gdouble hue;
|
||
gdouble r, g, b;
|
||
GdkBitmap *mask;
|
||
GdkGC *gc;
|
||
GdkColor color;
|
||
gint focus_width;
|
||
gint focus_pad;
|
||
|
||
gtk_widget_style_get (widget,
|
||
"focus-line-width", &focus_width,
|
||
"focus-padding", &focus_pad,
|
||
NULL);
|
||
|
||
priv = hsv->priv;
|
||
|
||
center = widget->requisition.width / 2.0;
|
||
|
||
outer = priv->size / 2.0;
|
||
inner = outer - priv->ring_width;
|
||
|
||
/* Paint the ring */
|
||
|
||
buf = g_new (guchar, width * height * 3);
|
||
|
||
for (yy = 0; yy < height; yy++)
|
||
{
|
||
p = buf + yy * width * 3;
|
||
|
||
dy = -(yy + y - center);
|
||
|
||
for (xx = 0; xx < width; xx++)
|
||
{
|
||
dx = xx + x - center;
|
||
|
||
dist = dx * dx + dy * dy;
|
||
if (dist < ((inner-1) * (inner-1)) || dist > ((outer+1) * (outer+1)))
|
||
{
|
||
*p++ = 0;
|
||
*p++ = 0;
|
||
*p++ = 0;
|
||
continue;
|
||
}
|
||
|
||
angle = atan2 (dy, dx);
|
||
if (angle < 0.0)
|
||
angle += 2.0 * G_PI;
|
||
|
||
hue = angle / (2.0 * G_PI);
|
||
|
||
r = hue;
|
||
g = 1.0;
|
||
b = 1.0;
|
||
hsv_to_rgb (&r, &g, &b);
|
||
|
||
*p++ = floor (r * 255 + 0.5);
|
||
*p++ = floor (g * 255 + 0.5);
|
||
*p++ = floor (b * 255 + 0.5);
|
||
}
|
||
}
|
||
|
||
/* Create clipping mask */
|
||
|
||
mask = gdk_pixmap_new (GTK_WIDGET (hsv)->window, width, height, 1);
|
||
|
||
gc = gdk_gc_new (mask);
|
||
|
||
color.pixel = 0;
|
||
gdk_gc_set_foreground (gc, &color);
|
||
gdk_draw_rectangle (mask, gc, TRUE,
|
||
0, 0, width, height);
|
||
|
||
|
||
color.pixel = 1;
|
||
gdk_gc_set_foreground (gc, &color);
|
||
gdk_draw_arc (mask, gc, TRUE,
|
||
focus_width + focus_pad - x,
|
||
focus_width + focus_pad - y,
|
||
priv->size - 1, priv->size - 1,
|
||
0, 360 * 64);
|
||
|
||
color.pixel = 0;
|
||
gdk_gc_set_foreground (gc, &color);
|
||
gdk_draw_arc (mask, gc, TRUE,
|
||
focus_width + focus_pad - x + priv->ring_width - 1,
|
||
focus_width + focus_pad - y + priv->ring_width - 1,
|
||
priv->size - 2 * priv->ring_width + 1, priv->size - 2 * priv->ring_width + 1,
|
||
0, 360 * 64);
|
||
|
||
g_object_unref (gc);
|
||
|
||
gdk_gc_set_clip_mask (priv->gc, mask);
|
||
gdk_gc_set_clip_origin (priv->gc, 0, 0);
|
||
|
||
/* Draw ring */
|
||
|
||
gdk_draw_rgb_image_dithalign (drawable, priv->gc, 0, 0, width, height,
|
||
GDK_RGB_DITHER_MAX,
|
||
buf,
|
||
width * 3,
|
||
x, y);
|
||
|
||
/* Draw value marker */
|
||
|
||
r = priv->h;
|
||
g = 1.0;
|
||
b = 1.0;
|
||
hsv_to_rgb (&r, &g, &b);
|
||
|
||
if (INTENSITY (r, g, b) > 0.5)
|
||
{
|
||
color.red = 0x0000;
|
||
color.green = 0x0000;
|
||
color.blue = 0x0000;
|
||
}
|
||
else
|
||
{
|
||
color.red = 0xffff;
|
||
color.green = 0xffff;
|
||
color.blue = 0xffff;
|
||
}
|
||
|
||
gdk_gc_set_rgb_fg_color (priv->gc, &color);
|
||
|
||
gdk_draw_line (drawable, priv->gc,
|
||
-x + center, -y + center,
|
||
-x + center + cos (priv->h * 2.0 * G_PI) * center,
|
||
-y + center - sin (priv->h * 2.0 * G_PI) * center);
|
||
|
||
gdk_gc_set_clip_mask (priv->gc, NULL);
|
||
g_object_unref (mask);
|
||
|
||
g_free (buf);
|
||
|
||
/* Draw ring outline */
|
||
|
||
if (GTK_WIDGET_HAS_FOCUS (hsv) && priv->focus_on_ring)
|
||
{
|
||
gtk_paint_focus (widget->style, drawable,
|
||
GTK_WIDGET_STATE (widget),
|
||
NULL, widget, NULL,
|
||
x, y, width, height);
|
||
}
|
||
}
|
||
|
||
/* Converts an HSV triplet to an integer RGB triplet */
|
||
static void
|
||
get_color (gdouble h,
|
||
gdouble s,
|
||
gdouble v,
|
||
gint *r,
|
||
gint *g,
|
||
gint *b)
|
||
{
|
||
hsv_to_rgb (&h, &s, &v);
|
||
|
||
*r = floor (h * 255 + 0.5);
|
||
*g = floor (s * 255 + 0.5);
|
||
*b = floor (v * 255 + 0.5);
|
||
}
|
||
|
||
#define SWAP(a, b, t) ((t) = (a), (a) = (b), (b) = (t))
|
||
|
||
#define LERP(a, b, v1, v2, i) (((v2) - (v1) != 0) \
|
||
? ((a) + ((b) - (a)) * ((i) - (v1)) / ((v2) - (v1))) \
|
||
: (a))
|
||
|
||
/* Paints the HSV triangle */
|
||
static void
|
||
paint_triangle (GtkHSV *hsv,
|
||
GdkDrawable *drawable,
|
||
gint x,
|
||
gint y,
|
||
gint width,
|
||
gint height)
|
||
{
|
||
GtkWidget *widget = GTK_WIDGET (hsv);
|
||
HSVPrivate *priv;
|
||
gint hx, hy, sx, sy, vx, vy; /* HSV vertices */
|
||
gint x1, y1, r1, g1, b1; /* First vertex in scanline order */
|
||
gint x2, y2, r2, g2, b2; /* Second vertex */
|
||
gint x3, y3, r3, g3, b3; /* Third vertex */
|
||
gint t;
|
||
guchar *buf, *p;
|
||
gint xl, xr, rl, rr, gl, gr, bl, br; /* Scanline data */
|
||
gint xx, yy;
|
||
GdkBitmap *mask;
|
||
GdkGC *gc;
|
||
GdkColor color;
|
||
GdkPoint points[3];
|
||
gdouble r, g, b;
|
||
gchar *detail;
|
||
|
||
priv = hsv->priv;
|
||
|
||
/* Compute triangle's vertices */
|
||
|
||
compute_triangle (hsv, &hx, &hy, &sx, &sy, &vx, &vy);
|
||
|
||
x1 = hx;
|
||
y1 = hy;
|
||
get_color (priv->h, 1.0, 1.0, &r1, &g1, &b1);
|
||
|
||
x2 = sx;
|
||
y2 = sy;
|
||
get_color (priv->h, 1.0, 0.0, &r2, &g2, &b2);
|
||
|
||
x3 = vx;
|
||
y3 = vy;
|
||
get_color (priv->h, 0.0, 1.0, &r3, &g3, &b3);
|
||
|
||
if (y2 > y3)
|
||
{
|
||
SWAP (x2, x3, t);
|
||
SWAP (y2, y3, t);
|
||
SWAP (r2, r3, t);
|
||
SWAP (g2, g3, t);
|
||
SWAP (b2, b3, t);
|
||
}
|
||
|
||
if (y1 > y3)
|
||
{
|
||
SWAP (x1, x3, t);
|
||
SWAP (y1, y3, t);
|
||
SWAP (r1, r3, t);
|
||
SWAP (g1, g3, t);
|
||
SWAP (b1, b3, t);
|
||
}
|
||
|
||
if (y1 > y2)
|
||
{
|
||
SWAP (x1, x2, t);
|
||
SWAP (y1, y2, t);
|
||
SWAP (r1, r2, t);
|
||
SWAP (g1, g2, t);
|
||
SWAP (b1, b2, t);
|
||
}
|
||
|
||
/* Shade the triangle */
|
||
|
||
buf = g_new (guchar, width * height * 3);
|
||
|
||
for (yy = 0; yy < height; yy++)
|
||
{
|
||
p = buf + yy * width * 3;
|
||
|
||
if (yy + y < y1 || yy + y > y3)
|
||
for (xx = 0; xx < width; xx++)
|
||
{
|
||
*p++ = 0;
|
||
*p++ = 0;
|
||
*p++ = 0;
|
||
}
|
||
else {
|
||
if (yy + y < y2)
|
||
{
|
||
xl = LERP (x1, x2, y1, y2, yy + y);
|
||
|
||
rl = LERP (r1, r2, y1, y2, yy + y);
|
||
gl = LERP (g1, g2, y1, y2, yy + y);
|
||
bl = LERP (b1, b2, y1, y2, yy + y);
|
||
}
|
||
else
|
||
{
|
||
xl = LERP (x2, x3, y2, y3, yy + y);
|
||
|
||
rl = LERP (r2, r3, y2, y3, yy + y);
|
||
gl = LERP (g2, g3, y2, y3, yy + y);
|
||
bl = LERP (b2, b3, y2, y3, yy + y);
|
||
}
|
||
|
||
xr = LERP (x1, x3, y1, y3, yy + y);
|
||
|
||
rr = LERP (r1, r3, y1, y3, yy + y);
|
||
gr = LERP (g1, g3, y1, y3, yy + y);
|
||
br = LERP (b1, b3, y1, y3, yy + y);
|
||
|
||
if (xl > xr)
|
||
{
|
||
SWAP (xl, xr, t);
|
||
SWAP (rl, rr, t);
|
||
SWAP (gl, gr, t);
|
||
SWAP (bl, br, t);
|
||
}
|
||
|
||
for (xx = 0; xx < width; xx++)
|
||
{
|
||
if (xx + x < xl || xx + x > xr)
|
||
{
|
||
*p++ = 0;
|
||
*p++ = 0;
|
||
*p++ = 0;
|
||
}
|
||
else
|
||
{
|
||
*p++ = LERP (rl, rr, xl, xr, xx + x);
|
||
*p++ = LERP (gl, gr, xl, xr, xx + x);
|
||
*p++ = LERP (bl, br, xl, xr, xx + x);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Create clipping mask */
|
||
|
||
mask = gdk_pixmap_new (widget->window, width, height, 1);
|
||
|
||
gc = gdk_gc_new (mask);
|
||
|
||
color.pixel = 0;
|
||
gdk_gc_set_foreground (gc, &color);
|
||
gdk_draw_rectangle (mask, gc, TRUE,
|
||
0, 0, width, height);
|
||
|
||
color.pixel = 1;
|
||
gdk_gc_set_foreground (gc, &color);
|
||
|
||
points[0].x = x1 - x;
|
||
points[0].y = y1 - y;
|
||
points[1].x = x2 - x;
|
||
points[1].y = y2 - y;
|
||
points[2].x = x3 - x;
|
||
points[2].y = y3 - y;
|
||
gdk_draw_polygon (mask, gc, TRUE, points, 3);
|
||
|
||
g_object_unref (gc);
|
||
|
||
gdk_gc_set_clip_mask (priv->gc, mask);
|
||
gdk_gc_set_clip_origin (priv->gc, 0, 0);
|
||
|
||
/* Draw triangle */
|
||
|
||
gdk_draw_rgb_image_dithalign (drawable, priv->gc, 0, 0, width, height,
|
||
GDK_RGB_DITHER_MAX,
|
||
buf,
|
||
width * 3,
|
||
x, y);
|
||
|
||
gdk_gc_set_clip_mask (priv->gc, NULL);
|
||
g_object_unref (mask);
|
||
|
||
g_free (buf);
|
||
|
||
/* Draw value marker */
|
||
|
||
xx = floor (sx + (vx - sx) * priv->v + (hx - vx) * priv->s * priv->v + 0.5) - x;
|
||
yy = floor (sy + (vy - sy) * priv->v + (hy - vy) * priv->s * priv->v + 0.5) - y;
|
||
|
||
r = priv->h;
|
||
g = priv->s;
|
||
b = priv->v;
|
||
hsv_to_rgb (&r, &g, &b);
|
||
|
||
if (INTENSITY (r, g, b) > 0.5)
|
||
{
|
||
detail = "colorwheel_light";
|
||
color.red = 0x0000;
|
||
color.green = 0x0000;
|
||
color.blue = 0x0000;
|
||
}
|
||
else
|
||
{
|
||
detail = "colorwheel_dark";
|
||
color.red = 0xffff;
|
||
color.green = 0xffff;
|
||
color.blue = 0xffff;
|
||
}
|
||
|
||
gdk_gc_set_rgb_fg_color (priv->gc, &color);
|
||
|
||
#define OUTER_RADIUS 4
|
||
#define INNER_RADIUS 3
|
||
#define FOCUS_RADIUS 6
|
||
|
||
gdk_draw_arc (drawable, priv->gc, FALSE,
|
||
xx - OUTER_RADIUS, yy - OUTER_RADIUS,
|
||
OUTER_RADIUS * 2, OUTER_RADIUS * 2,
|
||
0, 360 * 64);
|
||
gdk_draw_arc (drawable, priv->gc, FALSE,
|
||
xx - INNER_RADIUS, yy - INNER_RADIUS,
|
||
INNER_RADIUS * 2, INNER_RADIUS * 2,
|
||
0, 360 * 64);
|
||
|
||
/* Draw focus outline */
|
||
|
||
if (GTK_WIDGET_HAS_FOCUS (hsv) &&
|
||
!priv->focus_on_ring)
|
||
{
|
||
gint focus_width;
|
||
gint focus_pad;
|
||
|
||
gtk_widget_style_get (widget,
|
||
"focus-line-width", &focus_width,
|
||
"focus-padding", &focus_pad,
|
||
NULL);
|
||
|
||
gtk_paint_focus (widget->style, drawable,
|
||
GTK_WIDGET_STATE (widget),
|
||
NULL, widget, detail,
|
||
xx - FOCUS_RADIUS - focus_width - focus_pad,
|
||
yy - FOCUS_RADIUS - focus_width - focus_pad,
|
||
2 * (FOCUS_RADIUS + focus_width + focus_pad),
|
||
2 * (FOCUS_RADIUS + focus_width + focus_pad));
|
||
}
|
||
|
||
}
|
||
|
||
/* Paints the contents of the HSV color selector */
|
||
static void
|
||
paint (GtkHSV *hsv,
|
||
GdkDrawable *drawable,
|
||
gint x,
|
||
gint y,
|
||
gint width,
|
||
gint height)
|
||
{
|
||
paint_ring (hsv, drawable, x, y, width, height);
|
||
paint_triangle (hsv, drawable, x, y, width, height);
|
||
}
|
||
|
||
/* Expose_event handler for the HSV color selector */
|
||
static gint
|
||
gtk_hsv_expose (GtkWidget *widget,
|
||
GdkEventExpose *event)
|
||
{
|
||
GtkHSV *hsv;
|
||
HSVPrivate *priv;
|
||
GdkRectangle rect, dest;
|
||
GdkPixmap *pixmap;
|
||
|
||
hsv = GTK_HSV (widget);
|
||
priv = hsv->priv;
|
||
|
||
if (!(GTK_WIDGET_DRAWABLE (widget) && event->window == widget->window))
|
||
return FALSE;
|
||
|
||
rect.x = widget->allocation.x;
|
||
rect.y = widget->allocation.y;
|
||
rect.width = widget->allocation.width;
|
||
rect.height = widget->allocation.height;
|
||
|
||
if (!gdk_rectangle_intersect (&event->area, &rect, &dest))
|
||
return FALSE;
|
||
|
||
pixmap = gdk_pixmap_new (widget->window, dest.width, dest.height,
|
||
gtk_widget_get_visual (widget)->depth);
|
||
|
||
rect = dest;
|
||
rect.x = 0;
|
||
rect.y = 0;
|
||
|
||
gdk_draw_rectangle (pixmap,
|
||
widget->style->bg_gc[GTK_WIDGET_STATE (widget)],
|
||
TRUE,
|
||
0, 0, dest.width, dest.height);
|
||
paint (hsv, pixmap,
|
||
dest.x - widget->allocation.x, dest.y - widget->allocation.y,
|
||
dest.width, dest.height);
|
||
|
||
gdk_draw_drawable (widget->window,
|
||
priv->gc,
|
||
pixmap,
|
||
0, 0,
|
||
dest.x,
|
||
dest.y,
|
||
event->area.width, event->area.height);
|
||
|
||
g_object_unref (pixmap);
|
||
|
||
return FALSE;
|
||
}
|
||
|
||
static gboolean
|
||
gtk_hsv_focus (GtkWidget *widget,
|
||
GtkDirectionType dir)
|
||
{
|
||
GtkHSV *hsv;
|
||
HSVPrivate *priv;
|
||
|
||
hsv = GTK_HSV (widget);
|
||
priv = hsv->priv;
|
||
|
||
if (!GTK_WIDGET_HAS_FOCUS (hsv))
|
||
{
|
||
if (dir == GTK_DIR_TAB_BACKWARD)
|
||
priv->focus_on_ring = FALSE;
|
||
else
|
||
priv->focus_on_ring = TRUE;
|
||
|
||
gtk_widget_grab_focus (GTK_WIDGET (hsv));
|
||
return TRUE;
|
||
}
|
||
|
||
switch (dir)
|
||
{
|
||
case GTK_DIR_UP:
|
||
if (priv->focus_on_ring)
|
||
return FALSE;
|
||
else
|
||
priv->focus_on_ring = TRUE;
|
||
break;
|
||
|
||
case GTK_DIR_DOWN:
|
||
if (priv->focus_on_ring)
|
||
priv->focus_on_ring = FALSE;
|
||
else
|
||
return FALSE;
|
||
break;
|
||
|
||
case GTK_DIR_LEFT:
|
||
case GTK_DIR_TAB_BACKWARD:
|
||
if (priv->focus_on_ring)
|
||
return FALSE;
|
||
else
|
||
priv->focus_on_ring = TRUE;
|
||
break;
|
||
|
||
case GTK_DIR_RIGHT:
|
||
case GTK_DIR_TAB_FORWARD:
|
||
if (priv->focus_on_ring)
|
||
priv->focus_on_ring = FALSE;
|
||
else
|
||
return FALSE;
|
||
break;
|
||
}
|
||
|
||
gtk_widget_queue_draw (GTK_WIDGET (hsv));
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/**
|
||
* gtk_hsv_new:
|
||
* @void:
|
||
*
|
||
* Creates a new HSV color selector.
|
||
*
|
||
* Return value: A newly-created HSV color selector.
|
||
**/
|
||
GtkWidget*
|
||
gtk_hsv_new (void)
|
||
{
|
||
return g_object_new (GTK_TYPE_HSV, NULL);
|
||
}
|
||
|
||
/**
|
||
* gtk_hsv_set_color:
|
||
* @hsv: An HSV color selector.
|
||
* @h: Hue.
|
||
* @s: Saturation.
|
||
* @v: Value.
|
||
*
|
||
* Sets the current color in an HSV color selector. Color component values must
|
||
* be in the [0.0, 1.0] range.
|
||
**/
|
||
void
|
||
gtk_hsv_set_color (GtkHSV *hsv,
|
||
gdouble h,
|
||
gdouble s,
|
||
gdouble v)
|
||
{
|
||
HSVPrivate *priv;
|
||
|
||
g_return_if_fail (hsv != NULL);
|
||
g_return_if_fail (GTK_IS_HSV (hsv));
|
||
g_return_if_fail (h >= 0.0 && h <= 1.0);
|
||
g_return_if_fail (s >= 0.0 && s <= 1.0);
|
||
g_return_if_fail (v >= 0.0 && v <= 1.0);
|
||
|
||
priv = hsv->priv;
|
||
|
||
priv->h = h;
|
||
priv->s = s;
|
||
priv->v = v;
|
||
|
||
g_signal_emit (hsv, hsv_signals[CHANGED], 0);
|
||
|
||
gtk_widget_queue_draw (GTK_WIDGET (hsv));
|
||
}
|
||
|
||
/**
|
||
* gtk_hsv_get_color:
|
||
* @hsv: An HSV color selector.
|
||
* @h: Return value for the hue.
|
||
* @s: Return value for the saturation.
|
||
* @v: Return value for the value.
|
||
*
|
||
* Queries the current color in an HSV color selector. Returned values will be
|
||
* in the [0.0, 1.0] range.
|
||
**/
|
||
void
|
||
gtk_hsv_get_color (GtkHSV *hsv, double *h, double *s, double *v)
|
||
{
|
||
HSVPrivate *priv;
|
||
|
||
g_return_if_fail (GTK_IS_HSV (hsv));
|
||
|
||
priv = hsv->priv;
|
||
|
||
if (h)
|
||
*h = priv->h;
|
||
|
||
if (s)
|
||
*s = priv->s;
|
||
|
||
if (v)
|
||
*v = priv->v;
|
||
}
|
||
|
||
/**
|
||
* gtk_hsv_set_metrics:
|
||
* @hsv: An HSV color selector.
|
||
* @size: Diameter for the hue ring.
|
||
* @ring_width: Width of the hue ring.
|
||
*
|
||
* Sets the size and ring width of an HSV color selector.
|
||
**/
|
||
void
|
||
gtk_hsv_set_metrics (GtkHSV *hsv,
|
||
gint size,
|
||
gint ring_width)
|
||
{
|
||
HSVPrivate *priv;
|
||
int same_size;
|
||
|
||
g_return_if_fail (GTK_IS_HSV (hsv));
|
||
g_return_if_fail (size > 0);
|
||
g_return_if_fail (ring_width > 0);
|
||
g_return_if_fail (2 * ring_width + 1 <= size);
|
||
|
||
priv = hsv->priv;
|
||
|
||
same_size = (priv->size == size);
|
||
|
||
priv->size = size;
|
||
priv->ring_width = ring_width;
|
||
|
||
if (same_size)
|
||
gtk_widget_queue_draw (GTK_WIDGET (hsv));
|
||
else
|
||
gtk_widget_queue_resize (GTK_WIDGET (hsv));
|
||
}
|
||
|
||
/**
|
||
* gtk_hsv_get_metrics:
|
||
* @hsv: An HSV color selector.
|
||
* @size: Return value for the diameter of the hue ring.
|
||
* @ring_width: Return value for the width of the hue ring.
|
||
*
|
||
* Queries the size and ring width of an HSV color selector.
|
||
**/
|
||
void
|
||
gtk_hsv_get_metrics (GtkHSV *hsv,
|
||
gint *size,
|
||
gint *ring_width)
|
||
{
|
||
HSVPrivate *priv;
|
||
|
||
g_return_if_fail (GTK_IS_HSV (hsv));
|
||
|
||
priv = hsv->priv;
|
||
|
||
if (size)
|
||
*size = priv->size;
|
||
|
||
if (ring_width)
|
||
*ring_width = priv->ring_width;
|
||
}
|
||
|
||
/**
|
||
* gtk_hsv_is_adjusting:
|
||
* @hsv:
|
||
*
|
||
* An HSV color selector can be said to be adjusting if multiple rapid changes
|
||
* are being made to its value, for example, when the user is adjusting the
|
||
* value with the mouse. This function queries whether the HSV color selector
|
||
* is being adjusted or not.
|
||
*
|
||
* Return value: TRUE if clients can ignore changes to the color value, since
|
||
* they may be transitory, or FALSE if they should consider the color value
|
||
* status to be final.
|
||
**/
|
||
gboolean
|
||
gtk_hsv_is_adjusting (GtkHSV *hsv)
|
||
{
|
||
HSVPrivate *priv;
|
||
|
||
g_return_val_if_fail (GTK_IS_HSV (hsv), FALSE);
|
||
|
||
priv = hsv->priv;
|
||
|
||
return priv->mode != DRAG_NONE;
|
||
}
|
||
|
||
/**
|
||
* gtk_hsv_to_rgb:
|
||
* @h: Hue.
|
||
* @s: Saturation.
|
||
* @v: Value.
|
||
* @r: Return value for the red component.
|
||
* @g: Return value for the green component.
|
||
* @b: Return value for the blue component.
|
||
*
|
||
* Converts a color from HSV space to RGB. Input values must be in the
|
||
* [0.0, 1.0] range; output values will be in the same range.
|
||
**/
|
||
void
|
||
gtk_hsv_to_rgb (gdouble h,
|
||
gdouble s,
|
||
gdouble v,
|
||
gdouble *r,
|
||
gdouble *g,
|
||
gdouble *b)
|
||
{
|
||
g_return_if_fail (h >= 0.0 && h <= 1.0);
|
||
g_return_if_fail (s >= 0.0 && s <= 1.0);
|
||
g_return_if_fail (v >= 0.0 && v <= 1.0);
|
||
|
||
hsv_to_rgb (&h, &s, &v);
|
||
|
||
if (r)
|
||
*r = h;
|
||
|
||
if (g)
|
||
*g = s;
|
||
|
||
if (b)
|
||
*b = v;
|
||
}
|
||
|
||
/**
|
||
* gtk_hsv_to_rgb:
|
||
* @r: Red.
|
||
* @g: Green.
|
||
* @b: Blue.
|
||
* @h: Return value for the hue component.
|
||
* @s: Return value for the saturation component.
|
||
* @v: Return value for the value component.
|
||
*
|
||
* Converts a color from RGB space to HSV. Input values must be in the
|
||
* [0.0, 1.0] range; output values will be in the same range.
|
||
**/
|
||
void
|
||
gtk_rgb_to_hsv (gdouble r,
|
||
gdouble g,
|
||
gdouble b,
|
||
gdouble *h,
|
||
gdouble *s,
|
||
gdouble *v)
|
||
{
|
||
g_return_if_fail (r >= 0.0 && r <= 1.0);
|
||
g_return_if_fail (g >= 0.0 && g <= 1.0);
|
||
g_return_if_fail (b >= 0.0 && b <= 1.0);
|
||
|
||
rgb_to_hsv (&r, &g, &b);
|
||
|
||
if (h)
|
||
*h = r;
|
||
|
||
if (s)
|
||
*s = g;
|
||
|
||
if (v)
|
||
*v = b;
|
||
}
|
||
|
||
static void
|
||
gtk_hsv_move (GtkHSV *hsv,
|
||
GtkDirectionType dir)
|
||
{
|
||
HSVPrivate *priv;
|
||
gdouble hue, sat, val;
|
||
gint hx, hy, sx, sy, vx, vy; /* HSV vertices */
|
||
gint x, y; /* position in triangle */
|
||
|
||
priv = hsv->priv;
|
||
|
||
hue = priv->h;
|
||
sat = priv->s;
|
||
val = priv->v;
|
||
|
||
compute_triangle (hsv, &hx, &hy, &sx, &sy, &vx, &vy);
|
||
|
||
x = floor (sx + (vx - sx) * priv->v + (hx - vx) * priv->s * priv->v + 0.5);
|
||
y = floor (sy + (vy - sy) * priv->v + (hy - vy) * priv->s * priv->v + 0.5);
|
||
|
||
#define HUE_DELTA 0.002
|
||
switch (dir)
|
||
{
|
||
case GTK_DIR_UP:
|
||
if (priv->focus_on_ring)
|
||
hue += HUE_DELTA;
|
||
else
|
||
{
|
||
y -= 1;
|
||
compute_sv (hsv, x, y, &sat, &val);
|
||
}
|
||
break;
|
||
|
||
case GTK_DIR_DOWN:
|
||
if (priv->focus_on_ring)
|
||
hue -= HUE_DELTA;
|
||
else
|
||
{
|
||
y += 1;
|
||
compute_sv (hsv, x, y, &sat, &val);
|
||
}
|
||
break;
|
||
|
||
case GTK_DIR_LEFT:
|
||
if (priv->focus_on_ring)
|
||
hue += HUE_DELTA;
|
||
else
|
||
{
|
||
x -= 1;
|
||
compute_sv (hsv, x, y, &sat, &val);
|
||
}
|
||
break;
|
||
|
||
case GTK_DIR_RIGHT:
|
||
if (priv->focus_on_ring)
|
||
hue -= HUE_DELTA
|
||
;
|
||
else
|
||
{
|
||
x += 1;
|
||
compute_sv (hsv, x, y, &sat, &val);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
/* we don't care about the tab directions */
|
||
break;
|
||
}
|
||
|
||
/* Wrap */
|
||
if (hue < 0.0)
|
||
hue = 1.0;
|
||
else if (hue > 1.0)
|
||
hue = 0.0;
|
||
|
||
gtk_hsv_set_color (hsv, hue, sat, val);
|
||
}
|
||
|
||
static GdkGC *
|
||
gtk_hsv_get_focus_gc (GtkHSV *hsv,
|
||
gint *line_width)
|
||
{
|
||
GdkGC *focus_gc;
|
||
GtkWidget *widget = GTK_WIDGET (hsv);
|
||
gint8 *dash_list;
|
||
|
||
focus_gc = gdk_gc_new (widget->window);
|
||
gdk_gc_copy (focus_gc, widget->style->fg_gc[GTK_WIDGET_STATE (widget)]);
|
||
|
||
gtk_widget_style_get (widget,
|
||
"focus-line-width", line_width,
|
||
"focus-line-pattern", (gchar *)&dash_list,
|
||
NULL);
|
||
|
||
gdk_gc_set_line_attributes (focus_gc, *line_width,
|
||
dash_list[0] ? GDK_LINE_ON_OFF_DASH : GDK_LINE_SOLID,
|
||
GDK_CAP_BUTT, GDK_JOIN_MITER);
|
||
if (dash_list[0])
|
||
gdk_gc_set_dashes (focus_gc, 0, dash_list, strlen (dash_list));
|
||
|
||
g_free (dash_list);
|
||
|
||
return focus_gc;
|
||
}
|