--- /dev/null
+// Copyright (c) 2011-2013 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_QT_INTRO_H
+#define BITCOIN_QT_INTRO_H
+
+#include <QDialog>
+#include <QMutex>
+#include <QThread>
+
+class FreespaceChecker;
+
+namespace Ui {
+ class Intro;
+}
+
+/** Introduction screen (pre-GUI startup).
+ Allows the user to choose a data directory,
+ in which the wallet and block chain will be stored.
+ */
+class Intro : public QDialog
+{
+ Q_OBJECT
+
+public:
+ explicit Intro(QWidget *parent = 0);
+ ~Intro();
+
+ QString getDataDirectory();
+ void setDataDirectory(const QString &dataDir);
+
+ /**
+ * Determine data directory. Let the user choose if the current one doesn't exist.
+ *
+ * @note do NOT call global GetDataDir() before calling this function, this
+ * will cause the wrong path to be cached.
+ */
+ static void pickDataDirectory();
+
+ /**
+ * Determine default data directory for operating system.
+ */
+ static QString getDefaultDataDirectory();
+
+signals:
+ void requestCheck();
+ void stopThread();
+
+public slots:
+ void setStatus(int status, const QString &message, quint64 bytesAvailable);
+
+private slots:
+ void on_dataDirectory_textChanged(const QString &arg1);
+ void on_ellipsisButton_clicked();
+ void on_dataDirDefault_clicked();
+ void on_dataDirCustom_clicked();
+
+private:
+ Ui::Intro *ui;
+ QThread *thread;
+ QMutex mutex;
+ bool signalled;
+ QString pathToCheck;
+
+ void startThread();
+ void checkPath(const QString &dataDir);
+ QString getPathToCheck();
+
+ friend class FreespaceChecker;
+};
+
+#endif // BITCOIN_QT_INTRO_H