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 static void gtk_ruler_class_init (GtkRulerClass *klass);
22 static void gtk_ruler_init (GtkRuler *ruler);
23 static void gtk_ruler_realize (GtkWidget *widget);
24 static void gtk_ruler_unrealize (GtkWidget *widget);
25 static void gtk_ruler_size_allocate (GtkWidget *widget,
26 GtkAllocation *allocation);
27 static gint gtk_ruler_expose (GtkWidget *widget,
28 GdkEventExpose *event);
29 static void gtk_ruler_make_pixmap (GtkRuler *ruler);
32 static GtkRulerMetric ruler_metrics[] =
34 {"Pixels", "Pi", 1.0, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
35 {"Inches", "In", 72.0, { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }, { 1, 2, 4, 8, 16 }},
36 {"Centimeters", "Cn", 28.35, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
43 static guint ruler_type = 0;
47 GtkTypeInfo ruler_info =
51 sizeof (GtkRulerClass),
52 (GtkClassInitFunc) gtk_ruler_class_init,
53 (GtkObjectInitFunc) gtk_ruler_init,
58 ruler_type = gtk_type_unique (gtk_widget_get_type (), &ruler_info);
65 gtk_ruler_class_init (GtkRulerClass *class)
67 GtkObjectClass *object_class;
68 GtkWidgetClass *widget_class;
70 object_class = (GtkObjectClass*) class;
71 widget_class = (GtkWidgetClass*) class;
73 widget_class->realize = gtk_ruler_realize;
74 widget_class->unrealize = gtk_ruler_unrealize;
75 widget_class->size_allocate = gtk_ruler_size_allocate;
76 widget_class->expose_event = gtk_ruler_expose;
78 class->draw_ticks = NULL;
79 class->draw_pos = NULL;
83 gtk_ruler_init (GtkRuler *ruler)
85 ruler->backing_store = NULL;
86 ruler->non_gr_exp_gc = NULL;
89 ruler->slider_size = 0;
95 gtk_ruler_set_metric (ruler, GTK_PIXELS);
99 gtk_ruler_set_metric (GtkRuler *ruler,
100 GtkMetricType metric)
102 g_return_if_fail (ruler != NULL);
103 g_return_if_fail (GTK_IS_RULER (ruler));
105 ruler->metric = &ruler_metrics[metric];
107 if (GTK_WIDGET_DRAWABLE (ruler))
108 gtk_widget_queue_draw (GTK_WIDGET (ruler));
112 gtk_ruler_set_range (GtkRuler *ruler,
118 g_return_if_fail (ruler != NULL);
119 g_return_if_fail (GTK_IS_RULER (ruler));
121 ruler->lower = lower;
122 ruler->upper = upper;
123 ruler->position = position;
124 ruler->max_size = max_size;
126 if (GTK_WIDGET_DRAWABLE (ruler))
127 gtk_widget_queue_draw (GTK_WIDGET (ruler));
131 gtk_ruler_draw_ticks (GtkRuler *ruler)
133 g_return_if_fail (ruler != NULL);
134 g_return_if_fail (GTK_IS_RULER (ruler));
136 if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks)
137 (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks) (ruler);
141 gtk_ruler_draw_pos (GtkRuler *ruler)
143 g_return_if_fail (ruler != NULL);
144 g_return_if_fail (GTK_IS_RULER (ruler));
146 if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos)
147 (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos) (ruler);
152 gtk_ruler_realize (GtkWidget *widget)
155 GdkWindowAttr attributes;
156 gint attributes_mask;
158 g_return_if_fail (widget != NULL);
159 g_return_if_fail (GTK_IS_RULER (widget));
161 ruler = GTK_RULER (widget);
162 GTK_WIDGET_SET_FLAGS (ruler, GTK_REALIZED);
164 attributes.window_type = GDK_WINDOW_CHILD;
165 attributes.x = widget->allocation.x;
166 attributes.y = widget->allocation.y;
167 attributes.width = widget->allocation.width;
168 attributes.height = widget->allocation.height;
169 attributes.wclass = GDK_INPUT_OUTPUT;
170 attributes.visual = gtk_widget_get_visual (widget);
171 attributes.colormap = gtk_widget_get_colormap (widget);
172 attributes.event_mask = gtk_widget_get_events (widget);
173 attributes.event_mask |= (GDK_EXPOSURE_MASK |
174 GDK_POINTER_MOTION_MASK |
175 GDK_POINTER_MOTION_HINT_MASK);
177 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
179 widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
180 gdk_window_set_user_data (widget->window, ruler);
182 widget->style = gtk_style_attach (widget->style, widget->window);
183 gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
185 gtk_ruler_make_pixmap (ruler);
189 gtk_ruler_unrealize (GtkWidget *widget)
193 g_return_if_fail (widget != NULL);
194 g_return_if_fail (GTK_IS_RULER (widget));
196 ruler = GTK_RULER (widget);
197 GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
199 gtk_style_detach (widget->style);
200 gdk_window_destroy (widget->window);
201 widget->window = NULL;
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;
213 gtk_ruler_size_allocate (GtkWidget *widget,
214 GtkAllocation *allocation)
218 g_return_if_fail (widget != NULL);
219 g_return_if_fail (GTK_IS_RULER (widget));
221 ruler = GTK_RULER (widget);
222 widget->allocation = *allocation;
224 if (GTK_WIDGET_REALIZED (widget))
226 gdk_window_move_resize (widget->window,
227 allocation->x, allocation->y,
228 allocation->width, allocation->height);
230 gtk_ruler_make_pixmap (ruler);
235 gtk_ruler_expose (GtkWidget *widget,
236 GdkEventExpose *event)
240 g_return_val_if_fail (widget != NULL, FALSE);
241 g_return_val_if_fail (GTK_IS_RULER (widget), FALSE);
242 g_return_val_if_fail (event != NULL, FALSE);
244 if (GTK_WIDGET_DRAWABLE (widget))
246 ruler = GTK_RULER (widget);
248 gdk_draw_rectangle (ruler->backing_store,
249 widget->style->bg_gc[GTK_STATE_NORMAL],
251 widget->allocation.width,
252 widget->allocation.height);
254 gtk_ruler_draw_ticks (ruler);
256 gtk_draw_shadow (widget->style, ruler->backing_store,
257 GTK_STATE_NORMAL, GTK_SHADOW_OUT, 0, 0,
258 widget->allocation.width,
259 widget->allocation.height);
261 gdk_draw_pixmap (widget->window,
262 ruler->non_gr_exp_gc,
263 ruler->backing_store,
265 widget->allocation.width,
266 widget->allocation.height);
268 gtk_ruler_draw_pos (ruler);
275 gtk_ruler_make_pixmap (GtkRuler *ruler)
281 widget = GTK_WIDGET (ruler);
283 if (ruler->backing_store)
285 gdk_window_get_size (ruler->backing_store, &width, &height);
286 if ((width == widget->allocation.width) &&
287 (height == widget->allocation.height))
290 gdk_pixmap_unref (ruler->backing_store);
293 ruler->backing_store = gdk_pixmap_new (widget->window,
294 widget->allocation.width,
295 widget->allocation.height,
301 if (!ruler->non_gr_exp_gc)
303 ruler->non_gr_exp_gc = gdk_gc_new (widget->window);
304 gdk_gc_set_exposures (ruler->non_gr_exp_gc, FALSE);