Add initial scrolling support with a QAbstractScrollArea

[pulseview.git] / sigview.h

diff --git a/sigview.h b/sigview.h
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+/*
+ * This file is part of the sigrok project.
+ *
+ * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#ifndef SIGVIEW_H
+#define SIGVIEW_H
+
+#include <stdint.h>
+
+#include <QAbstractScrollArea>
+
+class SigSession;
+class SigViewport;
+
+class SigView : public QAbstractScrollArea {
+       Q_OBJECT
+
+private:
+       static const double MaxScale;
+       static const double MinScale;
+
+       static const int LabelMarginWidth;
+       static const int RulerHeight;
+
+public:
+       explicit SigView(SigSession &session, QWidget *parent = 0);
+
+       double scale() const;
+       double offset() const;
+       int v_offset() const;
+
+       void zoom(double steps);
+
+       void set_scale_offset(double scale, double offset);
+
+private:
+       void update_scroll();
+
+       void zoom(double steps, int offset);
+
+private:
+       bool viewportEvent(QEvent *e);
+
+       void resizeEvent(QResizeEvent *e);
+
+private slots:
+       void h_scroll_value_changed(int value);
+       void v_scroll_value_changed(int value);
+
+       void data_updated();
+
+private:
+       SigSession &_session;
+
+       SigViewport *_viewport;
+
+       uint64_t _data_length;
+
+       double _scale;
+       double _offset;
+
+       int _v_offset;
+
+       friend class SigViewport;
+};
+
+#endif // SIGVIEW_H