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 GtkWidgetClass *parent_class;
34 static GtkRulerMetric ruler_metrics[] =
36 {"Pixels", "Pi", 1.0, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
37 {"Inches", "In", 72.0, { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }, { 1, 2, 4, 8, 16 }},
38 {"Centimeters", "Cn", 28.35, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
45 static guint ruler_type = 0;
49 GtkTypeInfo ruler_info =
53 sizeof (GtkRulerClass),
54 (GtkClassInitFunc) gtk_ruler_class_init,
55 (GtkObjectInitFunc) gtk_ruler_init,
60 ruler_type = gtk_type_unique (gtk_widget_get_type (), &ruler_info);
67 gtk_ruler_class_init (GtkRulerClass *class)
69 GtkObjectClass *object_class;
70 GtkWidgetClass *widget_class;
72 object_class = (GtkObjectClass*) class;
73 widget_class = (GtkWidgetClass*) class;
75 parent_class = gtk_type_class (gtk_widget_get_type ());
77 widget_class->realize = gtk_ruler_realize;
78 widget_class->unrealize = gtk_ruler_unrealize;
79 widget_class->size_allocate = gtk_ruler_size_allocate;
80 widget_class->expose_event = gtk_ruler_expose;
82 class->draw_ticks = NULL;
83 class->draw_pos = NULL;
87 gtk_ruler_init (GtkRuler *ruler)
89 ruler->backing_store = NULL;
90 ruler->non_gr_exp_gc = NULL;
93 ruler->slider_size = 0;
99 gtk_ruler_set_metric (ruler, GTK_PIXELS);
103 gtk_ruler_set_metric (GtkRuler *ruler,
104 GtkMetricType metric)
106 g_return_if_fail (ruler != NULL);
107 g_return_if_fail (GTK_IS_RULER (ruler));
109 ruler->metric = &ruler_metrics[metric];
111 if (GTK_WIDGET_DRAWABLE (ruler))
112 gtk_widget_queue_draw (GTK_WIDGET (ruler));
116 gtk_ruler_set_range (GtkRuler *ruler,
122 g_return_if_fail (ruler != NULL);
123 g_return_if_fail (GTK_IS_RULER (ruler));
125 ruler->lower = lower;
126 ruler->upper = upper;
127 ruler->position = position;
128 ruler->max_size = max_size;
130 if (GTK_WIDGET_DRAWABLE (ruler))
131 gtk_widget_queue_draw (GTK_WIDGET (ruler));
135 gtk_ruler_draw_ticks (GtkRuler *ruler)
137 g_return_if_fail (ruler != NULL);
138 g_return_if_fail (GTK_IS_RULER (ruler));
140 if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks)
141 (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks) (ruler);
145 gtk_ruler_draw_pos (GtkRuler *ruler)
147 g_return_if_fail (ruler != NULL);
148 g_return_if_fail (GTK_IS_RULER (ruler));
150 if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos)
151 (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos) (ruler);
156 gtk_ruler_realize (GtkWidget *widget)
159 GdkWindowAttr attributes;
160 gint attributes_mask;
162 g_return_if_fail (widget != NULL);
163 g_return_if_fail (GTK_IS_RULER (widget));
165 ruler = GTK_RULER (widget);
166 GTK_WIDGET_SET_FLAGS (ruler, GTK_REALIZED);
168 attributes.window_type = GDK_WINDOW_CHILD;
169 attributes.x = widget->allocation.x;
170 attributes.y = widget->allocation.y;
171 attributes.width = widget->allocation.width;
172 attributes.height = widget->allocation.height;
173 attributes.wclass = GDK_INPUT_OUTPUT;
174 attributes.visual = gtk_widget_get_visual (widget);
175 attributes.colormap = gtk_widget_get_colormap (widget);
176 attributes.event_mask = gtk_widget_get_events (widget);
177 attributes.event_mask |= (GDK_EXPOSURE_MASK |
178 GDK_POINTER_MOTION_MASK |
179 GDK_POINTER_MOTION_HINT_MASK);
181 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
183 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
184 gdk_window_set_user_data (widget->window, ruler);
186 widget->style = gtk_style_attach (widget->style, widget->window);
187 gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
189 gtk_ruler_make_pixmap (ruler);
193 gtk_ruler_unrealize (GtkWidget *widget)
197 g_return_if_fail (widget != NULL);
198 g_return_if_fail (GTK_IS_RULER (widget));
200 ruler = GTK_RULER (widget);
202 if (ruler->backing_store)
203 gdk_pixmap_unref (ruler->backing_store);
204 if (ruler->non_gr_exp_gc)
205 gdk_gc_destroy (ruler->non_gr_exp_gc);
207 ruler->backing_store = NULL;
208 ruler->non_gr_exp_gc = NULL;
210 if (GTK_WIDGET_CLASS (parent_class)->unrealize)
211 (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
215 gtk_ruler_size_allocate (GtkWidget *widget,
216 GtkAllocation *allocation)
220 g_return_if_fail (widget != NULL);
221 g_return_if_fail (GTK_IS_RULER (widget));
223 ruler = GTK_RULER (widget);
224 widget->allocation = *allocation;
226 if (GTK_WIDGET_REALIZED (widget))
228 gdk_window_move_resize (widget->window,
229 allocation->x, allocation->y,
230 allocation->width, allocation->height);
232 gtk_ruler_make_pixmap (ruler);
237 gtk_ruler_expose (GtkWidget *widget,
238 GdkEventExpose *event)
242 g_return_val_if_fail (widget != NULL, FALSE);
243 g_return_val_if_fail (GTK_IS_RULER (widget), FALSE);
244 g_return_val_if_fail (event != NULL, FALSE);
246 if (GTK_WIDGET_DRAWABLE (widget))
248 ruler = GTK_RULER (widget);
250 gdk_draw_rectangle (ruler->backing_store,
251 widget->style->bg_gc[GTK_STATE_NORMAL],
253 widget->allocation.width,
254 widget->allocation.height);
256 gtk_ruler_draw_ticks (ruler);
258 gtk_draw_shadow (widget->style, ruler->backing_store,
259 GTK_STATE_NORMAL, GTK_SHADOW_OUT, 0, 0,
260 widget->allocation.width,
261 widget->allocation.height);
263 gdk_draw_pixmap (widget->window,
264 ruler->non_gr_exp_gc,
265 ruler->backing_store,
267 widget->allocation.width,
268 widget->allocation.height);
270 gtk_ruler_draw_pos (ruler);
277 gtk_ruler_make_pixmap (GtkRuler *ruler)
283 widget = GTK_WIDGET (ruler);
285 if (ruler->backing_store)
287 gdk_window_get_size (ruler->backing_store, &width, &height);
288 if ((width == widget->allocation.width) &&
289 (height == widget->allocation.height))
292 gdk_pixmap_unref (ruler->backing_store);
295 ruler->backing_store = gdk_pixmap_new (widget->window,
296 widget->allocation.width,
297 widget->allocation.height,
303 if (!ruler->non_gr_exp_gc)
305 ruler->non_gr_exp_gc = gdk_gc_new (widget->window);
306 gdk_gc_set_exposures (ruler->non_gr_exp_gc, FALSE);