1 /** |
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2 * Relational pipes |
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3 * Copyright © 2018 František Kučera (Frantovo.cz, GlobalCode.info) |
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4 * |
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5 * This program is free software: you can redistribute it and/or modify |
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6 * it under the terms of the GNU General Public License as published by |
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7 * the Free Software Foundation, either version 3 of the License, or |
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8 * (at your option) any later version. |
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9 * |
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10 * This program is distributed in the hope that it will be useful, |
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 * GNU General Public License for more details. |
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14 * |
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15 * You should have received a copy of the GNU General Public License |
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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17 */ |
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18 #include <sys/prctl.h> |
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19 #include <stdio.h> |
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20 #include <unistd.h> |
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21 #include <iostream> |
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22 |
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23 #include <QApplication> |
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24 #include <QThread> |
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25 |
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26 #include <relpipe/cli/CLI.h> |
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27 #include <relpipe/cli/RelpipeCLIException.h> |
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28 #include <relpipe/reader/Factory.h> |
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29 #include <relpipe/reader/RelationalReader.h> |
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30 #include <relpipe/reader/RelpipeReaderException.h> |
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31 |
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32 #include "RelpipeChartMainWindow.h" |
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33 #include "QtRelationalReaderStringHadler.h" |
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34 |
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35 using namespace relpipe::cli; |
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36 using namespace relpipe::reader; |
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37 |
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38 // signal/slot parameters must be declared here and registered with qRegisterMetaType() |
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39 |
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40 Q_DECLARE_METATYPE(string_t) |
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41 Q_DECLARE_METATYPE(std::vector<AttributeMetadata>) |
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42 |
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43 class RelationalReaderThread : public QThread { |
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44 private: |
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45 std::shared_ptr<RelationalReader> reader; |
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46 public: |
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47 |
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48 // TODO: better background thread; lambda? |
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49 |
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50 RelationalReaderThread(std::shared_ptr<RelationalReader> reader) : |
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51 reader(reader) { |
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52 setTerminationEnabled(true); |
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53 } |
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54 |
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55 void run() { |
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56 try { |
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57 reader->process(); |
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58 } catch (RelpipeReaderException& e) { |
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59 // TODO: handle exception, show error dialog |
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60 std::wcerr << L"RelpipeReaderException: " << e.getMessge() << std::endl; |
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61 } |
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62 } |
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63 }; |
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64 |
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65 int main(int argc, char**argv) { |
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66 CLI cli(argc, argv); |
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67 // TODO: argument name collisions? Filter arguments? Use prefix for Qt? Qt: -title, -style, -geometry |
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68 QApplication app(argc, argv); |
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69 |
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70 std::shared_ptr<RelationalReader> reader(Factory::create(std::cin)); |
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71 int resultCode = CLI::EXIT_CODE_UNEXPECTED_ERROR; |
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72 |
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73 RelpipeChartMainWindow window; |
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74 window.show(); |
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75 |
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76 RelationalReaderThread t(reader); |
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77 |
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78 // Proxy that passes calls from the background thread to the GUI thread using signal-slot mechanism: |
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79 QtRelationalReaderStringHadler handler(&t); // &t instead of handler.moveToThread(&t); // QObject::moveToThread: Cannot move objects with a parent |
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80 |
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81 // see Q_DECLARE_METATYPE above |
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82 qRegisterMetaType<string_t>(); |
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83 qRegisterMetaType<std::vector < AttributeMetadata >> (); |
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84 |
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85 QObject::connect(&handler, &QtRelationalReaderStringHadler::startRelationReceived, &window, &RelpipeChartMainWindow::startRelation, Qt::ConnectionType::QueuedConnection); |
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86 QObject::connect(&handler, &QtRelationalReaderStringHadler::attributeReceived, &window, &RelpipeChartMainWindow::attribute, Qt::ConnectionType::QueuedConnection); |
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87 QObject::connect(&handler, &QtRelationalReaderStringHadler::endOfPipeReceived, &window, &RelpipeChartMainWindow::endOfPipe, Qt::ConnectionType::QueuedConnection); |
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88 |
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89 reader->addHandler(&handler); |
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90 |
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91 // Start background thread |
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92 t.start(); |
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93 |
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94 int qtResultCode = app.exec(); |
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95 |
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96 if (qtResultCode == 0) { |
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97 resultCode = CLI::EXIT_CODE_SUCCESS; |
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98 } else { |
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99 // TODO: report and log Qt errors if any |
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100 } |
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101 |
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102 if (t.isRunning()) { |
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103 std::wcerr << L"Background RelationalReader thread is still running → terminate()" << std::endl; |
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104 t.terminate(); |
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105 std::wcerr << L"Background RelationalReader thread was terminated → wait()" << std::endl; |
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106 t.wait(); |
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107 std::wcerr << L"Background RelationalReader thread wait() finished" << std::endl; |
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108 } |
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109 |
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110 return resultCode; |
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111 } |
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