Skeleton code for a non-blocking UI thread for downloading dives from the DC

This is the skeleton code for a non-blocking ui-thread
It already creates the first-thread ( 'do not block the ui' )
and the second thread ('download from the dive computer')
We can in the future merge both in the same place - I didn't
want to do that now because the download function is written
in the libdivecomputer.c code, and I cant just transform that
to a QThread and use signals, so I used two threads for that.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>

qt-ui/downloadfromdivecomputer.h

@@ -0,0 +1,46 @@
+#ifndef DOWNLOADFROMDIVECOMPUTER_H
+#define DOWNLOADFROMDIVECOMPUTER_H
+#include <QDialog>
+#include <QThread>
+
+namespace Ui{
+	class DownloadFromDiveComputer;
+}
+struct device_data_t;
+
+class DownloadThread : public QThread{
+	Q_OBJECT
+public:
+    explicit DownloadThread(device_data_t* data);
+    virtual void run();
+private:
+	device_data_t *data;
+};
+
+class InterfaceThread : public QThread{
+	Q_OBJECT
+public:
+	InterfaceThread(QObject *parent, device_data_t *data) ;
+    virtual void run();
+
+Q_SIGNALS:
+	void updateInterface(int value);
+private:
+	device_data_t *data;
+};
+
+class DownloadFromDCWidget : public QDialog{
+	Q_OBJECT
+public:
+    explicit DownloadFromDCWidget(QWidget* parent = 0, Qt::WindowFlags f = 0);
+
+public slots:
+	void on_ok_clicked();
+	void on_cancel_clicked();
+private:
+	Ui::DownloadFromDiveComputer *ui;
+	InterfaceThread *thread;
+};
+
+
+#endif