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-rw-r--r--src/qt/bitcoin.cpp58
1 files changed, 57 insertions, 1 deletions
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index cf115c48f1..ab0a37abff 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -129,6 +129,53 @@ static void handleRunawayException(std::exception *e)
exit(1);
}
+/** Help message for Bitcoin-Qt, shown with --help. */
+class HelpMessageBox: public QMessageBox
+{
+public:
+ HelpMessageBox(QWidget *parent = 0);
+
+ void exec();
+private:
+ QString header;
+ QString coreOptions;
+ QString uiOptions;
+};
+#include <QSpacerItem>
+#include <QGridLayout>
+HelpMessageBox::HelpMessageBox(QWidget *parent):
+ QMessageBox(parent)
+{
+ header = tr("Bitcoin-Qt") + " " + tr("version") + " " +
+ QString::fromStdString(FormatFullVersion()) + "\n\n" +
+ tr("Usage:") + "\n" +
+ " bitcoin-qt [options] " + "\n";
+ coreOptions = QString::fromStdString(HelpMessage());
+ uiOptions = tr("UI options") + ":\n" +
+ " -lang=<lang> " + tr("Set language, for example \"de_DE\" (default: system locale)") + "\n" +
+ " -min " + tr("Start minimized") + "\n" +
+ " -splash " + tr("Show splash screen on startup (default: 1)") + "\n";
+
+ setWindowTitle(tr("Bitcoin-Qt"));
+ setTextFormat(Qt::PlainText);
+ // setMinimumWidth is ignored for QMessageBox so put in nonbreaking spaces to make it wider.
+ QChar em_space(0x2003);
+ setText(header + QString(em_space).repeated(40));
+ setDetailedText(coreOptions + "\n" + uiOptions);
+}
+
+void HelpMessageBox::exec()
+{
+#if defined(WIN32)
+ // On windows, show a message box, as there is no stderr in windowed applications
+ QMessageBox::exec();
+#else
+ // On other operating systems, the expected action is to print the message to the console.
+ QString strUsage = header + "\n" + coreOptions + "\n" + uiOptions;
+ fprintf(stderr, "%s", strUsage.toStdString().c_str());
+#endif
+}
+
#ifdef WIN32
#define strncasecmp strnicmp
#endif
@@ -218,6 +265,15 @@ int main(int argc, char *argv[])
if (translator.load(lang_territory, ":/translations/"))
app.installTranslator(&translator);
+ // Show help message immediately after parsing command-line options (for "-lang") and setting locale,
+ // but before showing splash screen.
+ if (mapArgs.count("-?") || mapArgs.count("--help"))
+ {
+ HelpMessageBox help;
+ help.exec();
+ return 1;
+ }
+
QSplashScreen splash(QPixmap(":/images/splash"), 0);
if (GetBoolArg("-splash", true) && !GetBoolArg("-min"))
{
@@ -238,7 +294,7 @@ int main(int argc, char *argv[])
BitcoinGUI window;
guiref = &window;
- if(AppInit2(argc, argv))
+ if(AppInit2())
{
{
// Put this in a block, so that the Model objects are cleaned up before