Converting the device_info list into a Qt data structure

This data structure was quite fragile and made 'undo' when editing
rather hard to implement. So instead I decided to turn this into a
QMultiMap which seemed like the ideal data structure for it.

This map holds all the dive computer related data indexed by the model. As
QMultiMap it allows multiple entries per key (model string) and
disambiguates between them with the deviceId.

This commit turned out much larger than I wanted. But I didn't manage to
find a clean way to break it up and make the pieces make sense.

So this brings back the Ok / Cancel button for the dive computer edit
dialog. And it makes those two buttons actually do the right thing (which
is what started this whole process). For this to work we simply copy the
map to a working copy and do all edits on that one - and then copy that
over the 'real' map when we accept the changes.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 12 insertions, 9 deletions

diff --git a/qt-ui/models.h b/qt-ui/models.h
index b61c79cd6..e371ce1ea 100644
--- a/qt-ui/models.h
+++ b/qt-ui/models.h
@@ -13,6 +13,7 @@
 
 #include "../dive.h"
 #include "../divelist.h"
+#include "../qthelper.h"
 
 QFont defaultModelFont();
 
@@ -177,20 +178,22 @@ class DiveComputerModel : public QAbstractTableModel
 	Q_OBJECT
 public:
 	enum {REMOVE, MODEL, ID, NICKNAME, COLUMNS};
-    explicit DiveComputerModel(QObject* parent = 0);
-    virtual QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
-    virtual int columnCount(const QModelIndex& parent = QModelIndex()) const;
-    virtual QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const;
-    virtual int rowCount(const QModelIndex& parent = QModelIndex()) const;
-    virtual Qt::ItemFlags flags(const QModelIndex& index) const;
-    virtual bool setData(const QModelIndex& index, const QVariant& value, int role = Qt::EditRole);
+	DiveComputerModel(QMultiMap<QString, DiveComputerNode> &dcMap, QObject *parent = 0);
+	virtual QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
+	virtual int columnCount(const QModelIndex& parent = QModelIndex()) const;
+	virtual QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const;
+	virtual int rowCount(const QModelIndex& parent = QModelIndex()) const;
+	virtual Qt::ItemFlags flags(const QModelIndex& index) const;
+	virtual bool setData(const QModelIndex& index, const QVariant& value, int role = Qt::EditRole);
 	void update();
-	
+	void keepWorkingList();
+	void dropWorkingList();
+
 public slots:
 	void remove(const QModelIndex& index);
 private:
 	int numRows;
-	
+	QMultiMap<QString, DiveComputerNode> dcWorkingMap;
 };
 
 #endif