1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
22 #define MIN_ARROW_SIZE 11
25 static void gtk_arrow_class_init (GtkArrowClass *klass);
26 static void gtk_arrow_init (GtkArrow *arrow);
27 static gint gtk_arrow_expose (GtkWidget *widget,
28 GdkEventExpose *event);
32 gtk_arrow_get_type (void)
34 static guint arrow_type = 0;
38 GtkTypeInfo arrow_info =
42 sizeof (GtkArrowClass),
43 (GtkClassInitFunc) gtk_arrow_class_init,
44 (GtkObjectInitFunc) gtk_arrow_init,
45 /* reversed_1 */ NULL,
46 /* reversed_2 */ NULL,
47 (GtkClassInitFunc) NULL,
50 arrow_type = gtk_type_unique (gtk_misc_get_type (), &arrow_info);
57 gtk_arrow_class_init (GtkArrowClass *class)
59 GtkWidgetClass *widget_class;
61 widget_class = (GtkWidgetClass*) class;
63 widget_class->expose_event = gtk_arrow_expose;
67 gtk_arrow_init (GtkArrow *arrow)
69 GTK_WIDGET_SET_FLAGS (arrow, GTK_NO_WINDOW);
71 arrow->arrow_type = GTK_ARROW_RIGHT;
72 arrow->shadow_type = GTK_SHADOW_OUT;
76 gtk_arrow_new (GtkArrowType arrow_type,
77 GtkShadowType shadow_type)
81 arrow = gtk_type_new (gtk_arrow_get_type ());
83 GTK_WIDGET (arrow)->requisition.width = MIN_ARROW_SIZE + GTK_MISC (arrow)->xpad * 2;
84 GTK_WIDGET (arrow)->requisition.height = MIN_ARROW_SIZE + GTK_MISC (arrow)->ypad * 2;
86 arrow->arrow_type = arrow_type;
87 arrow->shadow_type = shadow_type;
89 return GTK_WIDGET (arrow);
93 gtk_arrow_set (GtkArrow *arrow,
94 GtkArrowType arrow_type,
95 GtkShadowType shadow_type)
97 g_return_if_fail (arrow != NULL);
98 g_return_if_fail (GTK_IS_ARROW (arrow));
100 if (((GtkArrowType) arrow->arrow_type != arrow_type) ||
101 ((GtkShadowType) arrow->shadow_type != shadow_type))
103 arrow->arrow_type = arrow_type;
104 arrow->shadow_type = shadow_type;
106 if (GTK_WIDGET_DRAWABLE (arrow))
108 gdk_window_clear_area (GTK_WIDGET (arrow)->window,
109 GTK_WIDGET (arrow)->allocation.x + 1,
110 GTK_WIDGET (arrow)->allocation.y + 1,
111 GTK_WIDGET (arrow)->allocation.width - 2,
112 GTK_WIDGET (arrow)->allocation.height - 2);
113 gtk_widget_queue_draw (GTK_WIDGET (arrow));
120 gtk_arrow_expose (GtkWidget *widget,
121 GdkEventExpose *event)
125 GtkShadowType shadow_type;
130 g_return_val_if_fail (widget != NULL, FALSE);
131 g_return_val_if_fail (GTK_IS_ARROW (widget), FALSE);
132 g_return_val_if_fail (event != NULL, FALSE);
134 if (GTK_WIDGET_DRAWABLE (widget))
136 arrow = GTK_ARROW (widget);
137 misc = GTK_MISC (widget);
139 width = widget->allocation.width - misc->xpad * 2;
140 height = widget->allocation.height - misc->ypad * 2;
141 extent = MIN (width, height);
143 x = ((widget->allocation.x + misc->xpad) * (1.0 - misc->xalign) +
144 (widget->allocation.x + widget->allocation.width - extent - misc->ypad) * misc->xalign);
145 y = ((widget->allocation.y + misc->ypad) * (1.0 - misc->yalign) +
146 (widget->allocation.y + widget->allocation.height - extent - misc->ypad) * misc->yalign);
148 shadow_type = arrow->shadow_type;
150 if (widget->state == GTK_STATE_ACTIVE)
152 if (shadow_type == GTK_SHADOW_IN)
153 shadow_type = GTK_SHADOW_OUT;
154 else if (shadow_type == GTK_SHADOW_OUT)
155 shadow_type = GTK_SHADOW_IN;
156 else if (shadow_type == GTK_SHADOW_ETCHED_IN)
157 shadow_type = GTK_SHADOW_ETCHED_OUT;
158 else if (shadow_type == GTK_SHADOW_ETCHED_OUT)
159 shadow_type = GTK_SHADOW_ETCHED_IN;
162 gtk_draw_arrow (widget->style, widget->window,
163 widget->state, shadow_type, arrow->arrow_type, TRUE,
164 x, y, extent, extent);