qml: Add qInstallMessageHandler

Author: hebasto

src/qml/bitcoin.cpp

@@ -6,6 +6,7 @@
 
 #include <init.h>
 #include <interfaces/node.h>
+#include <logging.h>
 #include <node/context.h>
 #include <node/ui_interface.h>
 #include <noui.h>
@@ -25,9 +26,14 @@
 #include <QQmlApplicationEngine>
 #include <QQmlContext>
 #include <QQuickWindow>
+#include <QString>
 #include <QStringLiteral>
 #include <QUrl>
 
+QT_BEGIN_NAMESPACE
+class QMessageLogContext;
+QT_END_NAMESPACE
+
 #if defined(QT_STATICPLUGIN)
 #include <QtPlugin>
 Q_IMPORT_PLUGIN(QtQuick2DialogsPlugin);
@@ -61,6 +67,17 @@ bool InitErrorMessageBox(
     qGuiApp->exec();
     return false;
 }
+
+/* qDebug() message handler --> debug.log */
+void DebugMessageHandler(QtMsgType type, const QMessageLogContext& context, const QString& msg)
+{
+    Q_UNUSED(context);
+    if (type == QtDebugMsg) {
+        LogPrint(BCLog::QT, "GUI: %s\n", msg.toStdString());
+    } else {
+        LogPrintf("GUI: %s\n", msg.toStdString());
+    }
+}
 } // namespace
 
 
@@ -154,6 +171,9 @@ int QmlGuiMain(int argc, char* argv[])
         return EXIT_FAILURE;
     }
 
+    // Install qDebug() message handler to route to debug.log
+    qInstallMessageHandler(DebugMessageHandler);
+
     qInfo() << "Graphics API in use:" << QmlUtil::GraphicsApi(window);
 
     return qGuiApp->exec();