1 | /* Overlay/Decorative Overlay |
2 | * #Keywords: GtkOverlay |
3 | * |
4 | * Another example of an overlay with some decorative |
5 | * and some interactive controls. |
6 | */ |
7 | |
8 | #include <gtk/gtk.h> |
9 | |
10 | static GtkTextTag *tag; |
11 | |
12 | static void |
13 | margin_changed (GtkAdjustment *adjustment, |
14 | GtkTextView *text) |
15 | { |
16 | int value; |
17 | |
18 | value = (int)gtk_adjustment_get_value (adjustment); |
19 | gtk_text_view_set_left_margin (GTK_TEXT_VIEW (text), left_margin: value); |
20 | g_object_set (object: tag, first_property_name: "pixels-above-lines" , value, NULL); |
21 | } |
22 | |
23 | GtkWidget * |
24 | do_overlay_decorative (GtkWidget *do_widget) |
25 | { |
26 | static GtkWidget *window = NULL; |
27 | |
28 | if (!window) |
29 | { |
30 | GtkWidget *overlay; |
31 | GtkWidget *sw; |
32 | GtkWidget *text; |
33 | GtkWidget *image; |
34 | GtkWidget *scale; |
35 | GtkTextBuffer *buffer; |
36 | GtkTextIter start, end; |
37 | GtkAdjustment *adjustment; |
38 | |
39 | window = gtk_window_new (); |
40 | gtk_window_set_default_size (GTK_WINDOW (window), width: 500, height: 510); |
41 | gtk_window_set_title (GTK_WINDOW (window), title: "Decorative Overlay" ); |
42 | |
43 | overlay = gtk_overlay_new (); |
44 | sw = gtk_scrolled_window_new (); |
45 | gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), |
46 | hscrollbar_policy: GTK_POLICY_AUTOMATIC, |
47 | vscrollbar_policy: GTK_POLICY_AUTOMATIC); |
48 | text = gtk_text_view_new (); |
49 | buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (text)); |
50 | |
51 | gtk_text_buffer_set_text (buffer, text: "Dear diary..." , len: -1); |
52 | |
53 | tag = gtk_text_buffer_create_tag (buffer, tag_name: "top-margin" , |
54 | first_property_name: "pixels-above-lines" , 0, |
55 | NULL); |
56 | gtk_text_buffer_get_start_iter (buffer, iter: &start); |
57 | end = start; |
58 | gtk_text_iter_forward_word_end (iter: &end); |
59 | gtk_text_buffer_apply_tag (buffer, tag, start: &start, end: &end); |
60 | |
61 | gtk_window_set_child (GTK_WINDOW (window), child: overlay); |
62 | gtk_overlay_set_child (GTK_OVERLAY (overlay), child: sw); |
63 | gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), child: text); |
64 | g_object_add_weak_pointer (G_OBJECT (window), weak_pointer_location: (gpointer *)&window); |
65 | |
66 | image = gtk_picture_new_for_resource (resource_path: "/overlay2/decor1.png" ); |
67 | gtk_overlay_add_overlay (GTK_OVERLAY (overlay), widget: image); |
68 | gtk_widget_set_can_target (widget: image, FALSE); |
69 | gtk_widget_set_halign (widget: image, align: GTK_ALIGN_START); |
70 | gtk_widget_set_valign (widget: image, align: GTK_ALIGN_START); |
71 | |
72 | image = gtk_picture_new_for_resource (resource_path: "/overlay2/decor2.png" ); |
73 | gtk_overlay_add_overlay (GTK_OVERLAY (overlay), widget: image); |
74 | gtk_widget_set_can_target (widget: image, FALSE); |
75 | gtk_widget_set_halign (widget: image, align: GTK_ALIGN_END); |
76 | gtk_widget_set_valign (widget: image, align: GTK_ALIGN_END); |
77 | |
78 | adjustment = gtk_adjustment_new (value: 0, lower: 0, upper: 100, step_increment: 1, page_increment: 1, page_size: 0); |
79 | g_signal_connect (adjustment, "value-changed" , |
80 | G_CALLBACK (margin_changed), text); |
81 | |
82 | scale = gtk_scale_new (orientation: GTK_ORIENTATION_HORIZONTAL, adjustment); |
83 | gtk_scale_set_draw_value (GTK_SCALE (scale), FALSE); |
84 | gtk_widget_set_size_request (widget: scale, width: 120, height: -1); |
85 | gtk_widget_set_margin_start (widget: scale, margin: 20); |
86 | gtk_widget_set_margin_end (widget: scale, margin: 20); |
87 | gtk_widget_set_margin_bottom (widget: scale, margin: 20); |
88 | gtk_overlay_add_overlay (GTK_OVERLAY (overlay), widget: scale); |
89 | gtk_widget_set_halign (widget: scale, align: GTK_ALIGN_START); |
90 | gtk_widget_set_valign (widget: scale, align: GTK_ALIGN_END); |
91 | gtk_widget_set_tooltip_text (widget: scale, text: "Margin" ); |
92 | |
93 | gtk_adjustment_set_value (adjustment, value: 100); |
94 | } |
95 | |
96 | if (!gtk_widget_get_visible (widget: window)) |
97 | gtk_widget_show (widget: window); |
98 | else |
99 | gtk_window_destroy (GTK_WINDOW (window)); |
100 | |
101 | return window; |
102 | } |
103 | |