DiffScrollSynchronizer.h++

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#ifndef __libquark_diff_DiffScrollSynchronizer_hxx
#define __libquark_diff_DiffScrollSynchronizer_hxx

#include <quark/DiffTypes.h++>

#include <QObject>
#include <QScrollBar>

namespace quark {
namespace diff {

class DiffableSourceTextEdit;
class DiffModel;

class DiffScrollSynchronizer : public QObject
{
  Q_OBJECT;

  public:

  DiffScrollSynchronizer(DiffModel* model,
                         DiffableSourceTextEdit* theirsPanel,
                         DiffableSourceTextEdit* basePanel,
                         DiffableSourceTextEdit* yoursPanel);
  ~DiffScrollSynchronizer();

  inline bool isActive() const
  { return(_active); }

  public slots:

  inline void setActive(bool active)
  { _active = active; }

  private slots:

  void theirsHorizontalScrollbarValueChanged();
  void baseHorizontalScrollbarValueChanged();
  void yoursHorizontalScrollbarValueChanged();
  void theirsVerticalScrollbarValueChanged();
  void baseVerticalScrollbarValueChanged();
  void yoursVerticalScrollbarValueChanged();

  private:

  void syncHorizontal(DiffableSourceTextEdit* thisPanel,
                      DiffableSourceTextEdit* otherPanel);
  void syncVertical(DiffableSourceTextEdit* thisPanel,
                    DiffableSourceTextEdit* otherPanel);

  DiffModel* _model;
  DiffableSourceTextEdit* _theirsPanel;
  DiffableSourceTextEdit* _basePanel;
  DiffableSourceTextEdit* _yoursPanel;
  bool _active;
  bool _adjusting;
};

} // namespace diff
} // namespace quark

#endif // __libquark_diff_DiffScrollSynchronizer_hxx