1 | /* GTK - The GIMP Toolkit |
2 | * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald |
3 | * |
4 | * This library is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser 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. |
8 | * |
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 | * Lesser General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with this library. If not, see <http://www.gnu.org/licenses/>.Free |
16 | */ |
17 | |
18 | /* |
19 | * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS |
20 | * file for a list of people on the GTK+ Team. See the ChangeLog |
21 | * files for a list of changes. These files are distributed with |
22 | * GTK+ at ftp://ftp.gtk.org/pub/gtk/. |
23 | */ |
24 | |
25 | #include <gtk/gtk.h> |
26 | |
27 | static void |
28 | combo_changed_cb (GtkWidget *combo, |
29 | gpointer data) |
30 | { |
31 | GtkWidget *label = GTK_WIDGET (data); |
32 | int active; |
33 | |
34 | active = gtk_combo_box_get_active (GTK_COMBO_BOX (combo)); |
35 | gtk_label_set_ellipsize (GTK_LABEL (label), mode: (PangoEllipsizeMode)active); |
36 | } |
37 | |
38 | static void |
39 | overlay_draw (GtkDrawingArea *da, |
40 | cairo_t *cr, |
41 | int width, |
42 | int height, |
43 | gpointer data) |
44 | { |
45 | GtkWidget *widget = GTK_WIDGET (da); |
46 | PangoLayout *layout; |
47 | const double dashes[] = { 6, 18 }; |
48 | GtkAllocation label_allocation; |
49 | GtkRequisition minimum_size, natural_size; |
50 | GtkWidget *label = data; |
51 | double x, y; |
52 | |
53 | cairo_translate (cr, tx: -0.5, ty: -0.5); |
54 | cairo_set_line_width (cr, width: 1); |
55 | |
56 | cairo_set_source_rgb (cr, red: 1, green: 1, blue: 1); |
57 | cairo_rectangle (cr, x: 0, y: 0, width, height); |
58 | cairo_fill (cr); |
59 | |
60 | gtk_widget_translate_coordinates (src_widget: label, dest_widget: widget, src_x: 0, src_y: 0, dest_x: &x, dest_y: &y); |
61 | layout = gtk_widget_create_pango_layout (widget, text: "" ); |
62 | |
63 | gtk_widget_get_preferred_size (widget: label, minimum_size: &minimum_size, natural_size: &natural_size); |
64 | |
65 | pango_layout_set_markup (layout, |
66 | markup: "<span color='#c33'>\342\227\217 requisition</span>\n" |
67 | "<span color='#3c3'>\342\227\217 natural size</span>\n" |
68 | "<span color='#33c'>\342\227\217 allocation</span>" , length: -1); |
69 | |
70 | pango_cairo_show_layout (cr, layout); |
71 | g_object_unref (object: layout); |
72 | |
73 | gtk_widget_get_allocation (widget: label, allocation: &label_allocation); |
74 | |
75 | cairo_rectangle (cr, |
76 | x: x + 0.5 * (label_allocation.width - minimum_size.width), |
77 | y: y + 0.5 * (label_allocation.height - minimum_size.height), |
78 | width: minimum_size.width, height: minimum_size.height); |
79 | cairo_set_source_rgb (cr, red: 0.8, green: 0.2, blue: 0.2); |
80 | cairo_set_dash (cr, NULL, num_dashes: 0, offset: 0); |
81 | cairo_stroke (cr); |
82 | |
83 | cairo_rectangle (cr, x, y, width: label_allocation.width, height: label_allocation.height); |
84 | cairo_set_source_rgb (cr, red: 0.2, green: 0.2, blue: 0.8); |
85 | cairo_set_dash (cr, dashes, num_dashes: 2, offset: 0.5); |
86 | cairo_stroke (cr); |
87 | |
88 | cairo_rectangle (cr, |
89 | x: x + 0.5 * (label_allocation.width - natural_size.width), |
90 | y: y + 0.5 * (label_allocation.height - natural_size.height), |
91 | width: natural_size.width, height: natural_size.height); |
92 | cairo_set_source_rgb (cr, red: 0.2, green: 0.8, blue: 0.2); |
93 | cairo_set_dash (cr, dashes, num_dashes: 2, offset: 12.5); |
94 | cairo_stroke (cr); |
95 | } |
96 | |
97 | static void |
98 | quit_cb (GtkWidget *widget, |
99 | gpointer data) |
100 | { |
101 | gboolean *done = data; |
102 | |
103 | *done = TRUE; |
104 | |
105 | g_main_context_wakeup (NULL); |
106 | } |
107 | |
108 | int |
109 | main (int argc, char *argv[]) |
110 | { |
111 | GtkWidget *window, *vbox, *label; |
112 | GtkWidget *combo, *scale, *overlay, *da; |
113 | gboolean done = FALSE; |
114 | |
115 | gtk_init (); |
116 | |
117 | window = gtk_window_new (); |
118 | gtk_window_set_default_size (GTK_WINDOW (window), width: 400, height: 300); |
119 | g_signal_connect (window, "destroy" , G_CALLBACK (quit_cb), &done); |
120 | |
121 | vbox = gtk_box_new (orientation: GTK_ORIENTATION_VERTICAL, spacing: 6); |
122 | gtk_window_set_child (GTK_WINDOW (window), child: vbox); |
123 | |
124 | combo = gtk_combo_box_text_new (); |
125 | scale = gtk_scale_new_with_range (orientation: GTK_ORIENTATION_HORIZONTAL, |
126 | min: 0, max: 360, step: 1); |
127 | label = gtk_label_new (str: "This label may be ellipsized\nto make it fit." ); |
128 | |
129 | gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), text: "NONE" ); |
130 | gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), text: "START" ); |
131 | gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), text: "MIDDLE" ); |
132 | gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), text: "END" ); |
133 | gtk_combo_box_set_active (GTK_COMBO_BOX (combo), index_: 0); |
134 | |
135 | gtk_widget_set_halign (widget: label, align: GTK_ALIGN_CENTER); |
136 | gtk_widget_set_valign (widget: label, align: GTK_ALIGN_CENTER); |
137 | |
138 | da = gtk_drawing_area_new (); |
139 | gtk_drawing_area_set_draw_func (GTK_DRAWING_AREA (da), draw_func: overlay_draw, user_data: label, NULL); |
140 | |
141 | overlay = gtk_overlay_new (); |
142 | gtk_overlay_set_child (GTK_OVERLAY (overlay), child: da); |
143 | gtk_widget_set_vexpand (widget: overlay, TRUE); |
144 | gtk_overlay_add_overlay (GTK_OVERLAY (overlay), widget: label); |
145 | |
146 | gtk_box_append (GTK_BOX (vbox), child: combo); |
147 | gtk_box_append (GTK_BOX (vbox), child: scale); |
148 | gtk_box_append (GTK_BOX (vbox), child: overlay); |
149 | |
150 | g_object_set_data (G_OBJECT (label), key: "combo" , data: combo); |
151 | |
152 | g_signal_connect (combo, "changed" , G_CALLBACK (combo_changed_cb), label); |
153 | |
154 | gtk_widget_show (widget: window); |
155 | |
156 | while (!done) |
157 | g_main_context_iteration (NULL, TRUE); |
158 | |
159 | return 0; |
160 | } |
161 | |