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annotate libgui/src/news-dock-widget.cc @ 17640:482222fe5b35

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use QTextBrowser instead of QWebView to display community news * configure.ac: Don't check for QtWebKit. * news-dock-widget.h, news-dock-widget.cc (news_dock_widget): Use QTextBrowser to display news.
author John W. Eaton <jwe@octave.org>
date Fri, 11 Oct 2013 20:04:49 -0400
parents f5950975a172
children 8680768efa8a
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1 /*
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2
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3 Copyright (C) 2013 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <iostream>
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28
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29 #include <QThread>
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30
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31 #include "news-dock-widget.h"
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32
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33 #include "Array.h"
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34 #include "str-vec.h"
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35 #include "url-transfer.h"
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36
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37 #include "version.h"
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38
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39 news_dock_widget::news_dock_widget (QWidget *p)
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40 : octave_dock_widget (p), browser (new QTextBrowser (this))
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41 {
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42 setObjectName ("NewsDockWidget");
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43 setWindowIcon (QIcon (":/icons/logo.png"));
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44 set_title (tr ("Community News"));
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45
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46 browser->setObjectName ("OctaveNews");
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47 browser->setOpenExternalLinks (true);
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48
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49 setWidget (browser);
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50
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51 load_news ();
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52 }
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53
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54 void
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55 news_dock_widget::load_news (void)
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56 {
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57 QString base_url = "http://octave.org";
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58 QString page = "community-news.html";
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59
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60 QThread *worker_thread = new QThread;
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61
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62 news_reader *reader = new news_reader (base_url, page);
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63
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64 reader->moveToThread (worker_thread);
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65
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66 connect (reader, SIGNAL (display_news_signal (const QString&)),
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67 this, SLOT (display_news (const QString&)));
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68
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69 connect (worker_thread, SIGNAL (started (void)), reader, SLOT (process ()));
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70
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71 connect (reader, SIGNAL (finished (void)), worker_thread, SLOT (quit ()));
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72
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73 connect (reader, SIGNAL (finished (void)), reader, SLOT (deleteLater ()));
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74
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75 connect (worker_thread, SIGNAL (finished (void)),
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76 worker_thread, SLOT (deleteLater ()));
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77
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78 worker_thread->start ();
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79 }
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80
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81 static const char fixed_news[] = "<html>\n\
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82 <body>\n\
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83 <p>\n\
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84 This window will be used to inform you about Octave community events.\n\
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85 Octave may show it to you even if you've chosen hide the window by\n\
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86 default. We'll try not to bother you too much, but we do want to keep\n\
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87 you up to date with the latest information about important bug fixes,\n\
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88 new releases, or any other news that all Octave users should be aware of.\n\
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89 </p>\n\
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90 <p>\n\
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91 Currently, Octave's community news source seems to be unavailable.\n\
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92 For the latest news, please check\n\
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93 <a href=\"http://octave.org/community-news.html\">http://octave.org/community-news.html</a>\n\
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94 when you have a connection to the web.\n\
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95 </p>\n\
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96 <p>\n\
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97 <small><em>&mdash; The Octave Developers, " OCTAVE_RELEASE_DATE "</em></small>\n\
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98 </body>\n\
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99 </html>\n";
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100
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101 void
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102 news_dock_widget::display_news (const QString& news)
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103 {
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104 if (news.contains ("this-is-the-gnu-octave-community-news-page"))
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105 {
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106 browser->setHtml (news);
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107
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108 if (news.contains ("critical-news-event") && ! isVisible ())
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109 setVisible (true);
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110 }
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111 else
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112 browser->setHtml (fixed_news);
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113 }
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114
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115 void
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116 news_reader::process (void)
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117 {
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118 // Run this part in a separate thread so Octave can continue to run
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119 // while we wait for the page to load. Then emit the signal to
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120 // display it when we have the page contents.
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121
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122 QString url = base_url + "/" + page;
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123 std::ostringstream buf;
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124 url_transfer octave_dot_org (url.toStdString (), buf);
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125
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126 Array<std::string> param;
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127 octave_dot_org.http_get (param);
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128
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129 QString html_text;
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130
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131 if (octave_dot_org.good ())
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132 html_text = QString::fromStdString (buf.str ());
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133
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134 emit display_news_signal (html_text);
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135
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136 emit finished ();
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137 }