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 static void gtk_ruler_class_init (GtkRulerClass *klass);
23 static void gtk_ruler_init (GtkRuler *ruler);
24 static void gtk_ruler_realize (GtkWidget *widget);
25 static void gtk_ruler_unrealize (GtkWidget *widget);
26 static void gtk_ruler_size_allocate (GtkWidget *widget,
27 GtkAllocation *allocation);
28 static gint gtk_ruler_expose (GtkWidget *widget,
29 GdkEventExpose *event);
30 static void gtk_ruler_make_pixmap (GtkRuler *ruler);
33 static GtkWidgetClass *parent_class;
35 static GtkRulerMetric ruler_metrics[] =
37 {"Pixels", "Pi", 1.0, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
38 {"Inches", "In", 72.0, { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }, { 1, 2, 4, 8, 16 }},
39 {"Centimeters", "Cn", 28.35, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
46 static guint ruler_type = 0;
50 GtkTypeInfo ruler_info =
54 sizeof (GtkRulerClass),
55 (GtkClassInitFunc) gtk_ruler_class_init,
56 (GtkObjectInitFunc) gtk_ruler_init,
61 ruler_type = gtk_type_unique (gtk_widget_get_type (), &ruler_info);
68 gtk_ruler_class_init (GtkRulerClass *class)
70 GtkObjectClass *object_class;
71 GtkWidgetClass *widget_class;
73 object_class = (GtkObjectClass*) class;
74 widget_class = (GtkWidgetClass*) class;
76 parent_class = gtk_type_class (gtk_widget_get_type ());
78 widget_class->realize = gtk_ruler_realize;
79 widget_class->unrealize = gtk_ruler_unrealize;
80 widget_class->size_allocate = gtk_ruler_size_allocate;
81 widget_class->expose_event = gtk_ruler_expose;
83 class->draw_ticks = NULL;
84 class->draw_pos = NULL;
88 gtk_ruler_init (GtkRuler *ruler)
90 ruler->backing_store = NULL;
91 ruler->non_gr_exp_gc = NULL;
94 ruler->slider_size = 0;
100 gtk_ruler_set_metric (ruler, GTK_PIXELS);
104 gtk_ruler_set_metric (GtkRuler *ruler,
105 GtkMetricType metric)
107 g_return_if_fail (ruler != NULL);
108 g_return_if_fail (GTK_IS_RULER (ruler));
110 ruler->metric = &ruler_metrics[metric];
112 if (GTK_WIDGET_DRAWABLE (ruler))
113 gtk_widget_queue_draw (GTK_WIDGET (ruler));
117 gtk_ruler_set_range (GtkRuler *ruler,
123 g_return_if_fail (ruler != NULL);
124 g_return_if_fail (GTK_IS_RULER (ruler));
126 ruler->lower = lower;
127 ruler->upper = upper;
128 ruler->position = position;
129 ruler->max_size = max_size;
131 if (GTK_WIDGET_DRAWABLE (ruler))
132 gtk_widget_queue_draw (GTK_WIDGET (ruler));
136 gtk_ruler_draw_ticks (GtkRuler *ruler)
138 g_return_if_fail (ruler != NULL);
139 g_return_if_fail (GTK_IS_RULER (ruler));
141 if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks)
142 (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks) (ruler);
146 gtk_ruler_draw_pos (GtkRuler *ruler)
148 g_return_if_fail (ruler != NULL);
149 g_return_if_fail (GTK_IS_RULER (ruler));
151 if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos)
152 (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos) (ruler);
157 gtk_ruler_realize (GtkWidget *widget)
160 GdkWindowAttr attributes;
161 gint attributes_mask;
163 g_return_if_fail (widget != NULL);
164 g_return_if_fail (GTK_IS_RULER (widget));
166 ruler = GTK_RULER (widget);
167 GTK_WIDGET_SET_FLAGS (ruler, GTK_REALIZED);
169 attributes.window_type = GDK_WINDOW_CHILD;
170 attributes.x = widget->allocation.x;
171 attributes.y = widget->allocation.y;
172 attributes.width = widget->allocation.width;
173 attributes.height = widget->allocation.height;
174 attributes.wclass = GDK_INPUT_OUTPUT;
175 attributes.visual = gtk_widget_get_visual (widget);
176 attributes.colormap = gtk_widget_get_colormap (widget);
177 attributes.event_mask = gtk_widget_get_events (widget);
178 attributes.event_mask |= (GDK_EXPOSURE_MASK |
179 GDK_POINTER_MOTION_MASK |
180 GDK_POINTER_MOTION_HINT_MASK);
182 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
184 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
185 gdk_window_set_user_data (widget->window, ruler);
187 widget->style = gtk_style_attach (widget->style, widget->window);
188 gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
190 gtk_ruler_make_pixmap (ruler);
194 gtk_ruler_unrealize (GtkWidget *widget)
198 g_return_if_fail (widget != NULL);
199 g_return_if_fail (GTK_IS_RULER (widget));
201 ruler = GTK_RULER (widget);
203 if (ruler->backing_store)
204 gdk_pixmap_unref (ruler->backing_store);
205 if (ruler->non_gr_exp_gc)
206 gdk_gc_destroy (ruler->non_gr_exp_gc);
208 ruler->backing_store = NULL;
209 ruler->non_gr_exp_gc = NULL;
211 if (GTK_WIDGET_CLASS (parent_class)->unrealize)
212 (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
216 gtk_ruler_size_allocate (GtkWidget *widget,
217 GtkAllocation *allocation)
221 g_return_if_fail (widget != NULL);
222 g_return_if_fail (GTK_IS_RULER (widget));
224 ruler = GTK_RULER (widget);
225 widget->allocation = *allocation;
227 if (GTK_WIDGET_REALIZED (widget))
229 gdk_window_move_resize (widget->window,
230 allocation->x, allocation->y,
231 allocation->width, allocation->height);
233 gtk_ruler_make_pixmap (ruler);
238 gtk_ruler_expose (GtkWidget *widget,
239 GdkEventExpose *event)
243 g_return_val_if_fail (widget != NULL, FALSE);
244 g_return_val_if_fail (GTK_IS_RULER (widget), FALSE);
245 g_return_val_if_fail (event != NULL, FALSE);
247 if (GTK_WIDGET_DRAWABLE (widget))
249 ruler = GTK_RULER (widget);
251 gdk_draw_rectangle (ruler->backing_store,
252 widget->style->bg_gc[GTK_STATE_NORMAL],
254 widget->allocation.width,
255 widget->allocation.height);
257 gtk_ruler_draw_ticks (ruler);
259 gtk_draw_shadow (widget->style, ruler->backing_store,
260 GTK_STATE_NORMAL, GTK_SHADOW_OUT, 0, 0,
261 widget->allocation.width,
262 widget->allocation.height);
264 gdk_draw_pixmap (widget->window,
265 ruler->non_gr_exp_gc,
266 ruler->backing_store,
268 widget->allocation.width,
269 widget->allocation.height);
271 gtk_ruler_draw_pos (ruler);
278 gtk_ruler_make_pixmap (GtkRuler *ruler)
284 widget = GTK_WIDGET (ruler);
286 if (ruler->backing_store)
288 gdk_window_get_size (ruler->backing_store, &width, &height);
289 if ((width == widget->allocation.width) &&
290 (height == widget->allocation.height))
293 gdk_pixmap_unref (ruler->backing_store);
296 ruler->backing_store = gdk_pixmap_new (widget->window,
297 widget->allocation.width,
298 widget->allocation.height,
304 if (!ruler->non_gr_exp_gc)
306 ruler->non_gr_exp_gc = gdk_gc_new (widget->window);
307 gdk_gc_set_exposures (ruler->non_gr_exp_gc, FALSE);