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50
51#include "languagechooser.h"
52#include "mainwindow.h"
53
54#include <QCoreApplication>
55#include <QCheckBox>
56#include <QDialogButtonBox>
57#include <QDir>
58#include <QGridLayout>
59#include <QGroupBox>
60#include <QPushButton>
61#include <QTranslator>
62
63LanguageChooser::LanguageChooser(const QString &defaultLang, QWidget *parent)
64 : QDialog(parent, Qt::WindowStaysOnTopHint)
65{
66 groupBox = new QGroupBox("Languages");
67
68 QGridLayout *groupBoxLayout = new QGridLayout;
69
70 const QStringList qmFiles = findQmFiles();
71 for (int i = 0; i < qmFiles.size(); ++i) {
72 const QString &qmlFile = qmFiles.at(i);
73 QCheckBox *checkBox = new QCheckBox(languageName(qmFile: qmlFile));
74 qmFileForCheckBoxMap.insert(akey: checkBox, avalue: qmlFile);
75 connect(sender: checkBox, signal: &QCheckBox::toggled,
76 receiver: this, slot: &LanguageChooser::checkBoxToggled);
77 if (languageMatch(lang: defaultLang, qmFile: qmlFile))
78 checkBox->setCheckState(Qt::Checked);
79 groupBoxLayout->addWidget(checkBox, row: i / 2, column: i % 2);
80 }
81 groupBox->setLayout(groupBoxLayout);
82
83 buttonBox = new QDialogButtonBox;
84 showAllButton = buttonBox->addButton(text: "Show All",
85 role: QDialogButtonBox::ActionRole);
86 hideAllButton = buttonBox->addButton(text: "Hide All",
87 role: QDialogButtonBox::ActionRole);
88
89 connect(sender: showAllButton, signal: &QAbstractButton::clicked, receiver: this, slot: &LanguageChooser::showAll);
90 connect(sender: hideAllButton, signal: &QAbstractButton::clicked, receiver: this, slot: &LanguageChooser::hideAll);
91
92 QVBoxLayout *mainLayout = new QVBoxLayout;
93 mainLayout->addWidget(groupBox);
94 mainLayout->addWidget(buttonBox);
95 setLayout(mainLayout);
96
97 setWindowTitle("I18N");
98}
99
100bool LanguageChooser::languageMatch(const QString &lang, const QString &qmFile)
101{
102 //qmFile: i18n_xx.qm
103 const QString prefix = "i18n_";
104 const int langTokenLength = 2; /*FIXME: is checking two chars enough?*/
105 return qmFile.midRef(position: qmFile.indexOf(s: prefix) + prefix.length(), n: langTokenLength) == lang.leftRef(n: langTokenLength);
106}
107
108bool LanguageChooser::eventFilter(QObject *object, QEvent *event)
109{
110 if (event->type() == QEvent::Close) {
111 MainWindow *window = qobject_cast<MainWindow *>(object);
112 if (window) {
113 QCheckBox *checkBox = mainWindowForCheckBoxMap.key(avalue: window);
114 if (checkBox)
115 checkBox->setChecked(false);
116 }
117 }
118 return QDialog::eventFilter(object, event);
119}
120
121void LanguageChooser::closeEvent(QCloseEvent * /* event */)
122{
123 QCoreApplication::quit();
124}
125
126void LanguageChooser::checkBoxToggled()
127{
128 QCheckBox *checkBox = qobject_cast<QCheckBox *>(object: sender());
129 MainWindow *window = mainWindowForCheckBoxMap.value(akey: checkBox);
130 if (!window) {
131 QTranslator translator;
132 translator.load(filename: qmFileForCheckBoxMap.value(akey: checkBox));
133 qApp->installTranslator(messageFile: &translator);
134
135 window = new MainWindow;
136 window->setPalette(colorForLanguage(language: checkBox->text()));
137
138 window->installEventFilter(filterObj: this);
139 mainWindowForCheckBoxMap.insert(akey: checkBox, avalue: window);
140 }
141 window->setVisible(checkBox->isChecked());
142}
143
144void LanguageChooser::showAll()
145{
146 for (auto it = qmFileForCheckBoxMap.keyBegin(); it != qmFileForCheckBoxMap.keyEnd(); ++it)
147 (*it)->setChecked(true);
148}
149
150void LanguageChooser::hideAll()
151{
152 for (auto it = qmFileForCheckBoxMap.keyBegin(); it != qmFileForCheckBoxMap.keyEnd(); ++it)
153 (*it)->setChecked(false);
154}
155
156QStringList LanguageChooser::findQmFiles()
157{
158 QDir dir(":/translations");
159 QStringList fileNames = dir.entryList(nameFilters: QStringList("*.qm"), filters: QDir::Files,
160 sort: QDir::Name);
161 for (QString &fileName : fileNames)
162 fileName = dir.filePath(fileName);
163 return fileNames;
164}
165
166QString LanguageChooser::languageName(const QString &qmFile)
167{
168 QTranslator translator;
169 translator.load(filename: qmFile);
170
171 return translator.translate(context: "MainWindow", sourceText: "English");
172}
173
174QColor LanguageChooser::colorForLanguage(const QString &language)
175{
176 uint hashValue = qHash(key: language);
177 int red = 156 + (hashValue & 0x3F);
178 int green = 156 + ((hashValue >> 6) & 0x3F);
179 int blue = 156 + ((hashValue >> 12) & 0x3F);
180 return QColor(red, green, blue);
181}
182

source code of qtbase/examples/widgets/tools/i18n/languagechooser.cpp