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 Free
16 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #define MIN_ARROW_SIZE 11
24 static void gtk_arrow_class_init (GtkArrowClass *klass);
25 static void gtk_arrow_init (GtkArrow *arrow);
26 static gint gtk_arrow_expose (GtkWidget *widget,
27 GdkEventExpose *event);
33 static guint arrow_type = 0;
37 GtkTypeInfo arrow_info =
41 sizeof (GtkArrowClass),
42 (GtkClassInitFunc) gtk_arrow_class_init,
43 (GtkObjectInitFunc) gtk_arrow_init,
47 arrow_type = gtk_type_unique (gtk_misc_get_type (), &arrow_info);
54 gtk_arrow_class_init (GtkArrowClass *class)
56 GtkWidgetClass *widget_class;
58 widget_class = (GtkWidgetClass*) class;
60 widget_class->expose_event = gtk_arrow_expose;
64 gtk_arrow_init (GtkArrow *arrow)
66 GTK_WIDGET_SET_FLAGS (arrow, GTK_NO_WINDOW);
68 arrow->arrow_type = GTK_ARROW_RIGHT;
69 arrow->shadow_type = GTK_SHADOW_OUT;
73 gtk_arrow_new (GtkArrowType arrow_type,
74 GtkShadowType shadow_type)
78 arrow = gtk_type_new (gtk_arrow_get_type ());
80 GTK_WIDGET (arrow)->requisition.width = MIN_ARROW_SIZE + GTK_MISC (arrow)->xpad * 2;
81 GTK_WIDGET (arrow)->requisition.height = MIN_ARROW_SIZE + GTK_MISC (arrow)->ypad * 2;
83 arrow->arrow_type = arrow_type;
84 arrow->shadow_type = shadow_type;
86 return GTK_WIDGET (arrow);
90 gtk_arrow_set (GtkArrow *arrow,
91 GtkArrowType arrow_type,
92 GtkShadowType shadow_type)
94 g_return_if_fail (arrow != NULL);
95 g_return_if_fail (GTK_IS_ARROW (arrow));
97 if (((GtkArrowType) arrow->arrow_type != arrow_type) ||
98 ((GtkShadowType) arrow->shadow_type != shadow_type))
100 arrow->arrow_type = arrow_type;
101 arrow->shadow_type = shadow_type;
103 if (GTK_WIDGET_DRAWABLE (arrow))
105 gdk_window_clear_area (GTK_WIDGET (arrow)->window,
106 GTK_WIDGET (arrow)->allocation.x + 1,
107 GTK_WIDGET (arrow)->allocation.y + 1,
108 GTK_WIDGET (arrow)->allocation.width - 2,
109 GTK_WIDGET (arrow)->allocation.height - 2);
110 gtk_widget_queue_draw (GTK_WIDGET (arrow));
117 gtk_arrow_expose (GtkWidget *widget,
118 GdkEventExpose *event)
122 GtkShadowType shadow_type;
127 g_return_val_if_fail (widget != NULL, FALSE);
128 g_return_val_if_fail (GTK_IS_ARROW (widget), FALSE);
129 g_return_val_if_fail (event != NULL, FALSE);
131 if (GTK_WIDGET_DRAWABLE (widget))
133 arrow = GTK_ARROW (widget);
134 misc = GTK_MISC (widget);
136 width = widget->allocation.width - misc->xpad * 2;
137 height = widget->allocation.height - misc->ypad * 2;
138 extent = MIN (width, height);
140 x = ((widget->allocation.x + misc->xpad) * (1.0 - misc->xalign) +
141 (widget->allocation.x + widget->allocation.width - extent - misc->ypad) * misc->xalign);
142 y = ((widget->allocation.y + misc->ypad) * (1.0 - misc->yalign) +
143 (widget->allocation.y + widget->allocation.height - extent - misc->ypad) * misc->yalign);
145 shadow_type = arrow->shadow_type;
147 if (widget->state == GTK_STATE_ACTIVE)
149 if (shadow_type == GTK_SHADOW_IN)
150 shadow_type = GTK_SHADOW_OUT;
151 else if (shadow_type == GTK_SHADOW_OUT)
152 shadow_type = GTK_SHADOW_IN;
153 else if (shadow_type == GTK_SHADOW_ETCHED_IN)
154 shadow_type = GTK_SHADOW_ETCHED_OUT;
155 else if (shadow_type == GTK_SHADOW_ETCHED_OUT)
156 shadow_type = GTK_SHADOW_ETCHED_IN;
159 gtk_draw_arrow (widget->style, widget->window,
160 widget->state, shadow_type, arrow->arrow_type, TRUE,
161 x, y, extent, extent);