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| 1 | /* |
| 2 | * gui/help.c - Online help |
| 3 | * |
| 4 | * Written 2016 by Werner Almesberger |
| 5 | * Copyright 2016 by Werner Almesberger |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #include <stdbool.h> |
| 14 | |
| 15 | #include <gtk/gtk.h> |
| 16 | |
| 17 | #ifdef USE_WEBKIT |
| 18 | #include <webkit2/webkit2.h> |
| 19 | #endif |
| 20 | |
| 21 | #include "gui/help.h" |
| 22 | |
| 23 | |
| 24 | static GtkWidget *window = NULL; |
| 25 | static bool visible; |
| 26 | |
| 27 | |
| 28 | static void destroy_help(GtkWidget *object, gpointer user_data) |
| 29 | { |
| 30 | gtk_widget_destroy(window); |
| 31 | window = NULL; |
| 32 | } |
| 33 | |
| 34 | |
| 35 | static gboolean key_press_event(GtkWidget *widget, GdkEventKey *event, |
| 36 | gpointer data) |
| 37 | { |
| 38 | switch (event->keyval) { |
| 39 | case GDK_KEY_h: |
| 40 | case GDK_KEY_q: |
| 41 | case GDK_KEY_Escape: |
| 42 | gtk_widget_hide(window); |
| 43 | visible = 0; |
| 44 | break; |
| 45 | } |
| 46 | return TRUE; |
| 47 | } |
| 48 | |
| 49 | |
| 50 | #ifdef USE_WEBKIT |
| 51 | |
| 52 | static GtkWidget *help_content(void) |
| 53 | { |
| 54 | GtkWidget *view; |
| 55 | WebKitSettings *settings; |
| 56 | |
| 57 | view = webkit_web_view_new(); |
| 58 | |
| 59 | settings = webkit_web_view_get_settings(WEBKIT_WEB_VIEW(view)); |
| 60 | webkit_settings_set_default_font_size(settings, 10); |
| 61 | |
| 62 | webkit_web_view_load_html(WEBKIT_WEB_VIEW(view), |
| 63 | #include "../help.inc" |
| 64 | , NULL); |
| 65 | |
| 66 | return view; |
| 67 | } |
| 68 | |
| 69 | #else /* USE_WEBKIT */ |
| 70 | |
| 71 | static GtkWidget *help_content(void) |
| 72 | { |
| 73 | GtkWidget *scroll, *label; |
| 74 | |
| 75 | scroll = gtk_scrolled_window_new(NULL, NULL); |
| 76 | label = gtk_label_new(NULL); |
| 77 | |
| 78 | gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(scroll), |
| 79 | GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC); |
| 80 | |
| 81 | gtk_label_set_line_wrap(GTK_LABEL(label), TRUE); |
| 82 | gtk_label_set_markup(GTK_LABEL(label), |
| 83 | #include "../help.inc" |
| 84 | ); |
| 85 | |
| 86 | gtk_container_add(GTK_CONTAINER(scroll), label); |
| 87 | |
| 88 | return scroll; |
| 89 | } |
| 90 | |
| 91 | #endif /* !USE_WEBKIT */ |
| 92 | |
| 93 | |
| 94 | static void new_help_window(void) |
| 95 | { |
| 96 | GtkWidget *content; |
| 97 | |
| 98 | window = gtk_window_new(GTK_WINDOW_TOPLEVEL); |
| 99 | content = help_content(); |
| 100 | |
| 101 | gtk_container_add(GTK_CONTAINER(window), content); |
| 102 | gtk_window_set_default_size(GTK_WINDOW(window), 480, 360); |
| 103 | gtk_widget_show_all(window); |
| 104 | |
| 105 | gtk_widget_set_can_focus(content, TRUE); |
| 106 | gtk_widget_add_events(content, GDK_KEY_PRESS_MASK); |
| 107 | |
| 108 | g_signal_connect(G_OBJECT(content), "key_press_event", |
| 109 | G_CALLBACK(key_press_event), NULL); |
| 110 | g_signal_connect(window, "destroy", G_CALLBACK(destroy_help), NULL); |
| 111 | |
| 112 | gtk_widget_show_all(window); |
| 113 | } |
| 114 | |
| 115 | |
| 116 | void help(void) |
| 117 | { |
| 118 | if (!window) { |
| 119 | new_help_window(); |
| 120 | visible = 1; |
| 121 | } else { |
| 122 | visible = !visible; |
| 123 | if (visible) |
| 124 | gtk_widget_show(window); |
| 125 | else |
| 126 | gtk_widget_hide(window); |
| 127 | } |
| 128 | } |
| 129 |
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