Add a structure to hold undo commands

Add the undocommands.cpp / undocommands.h files, which will hold a
collection of classes that will hold undo commands.

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

qt-ui/undocommands.cpp

@@ -0,0 +1,16 @@
+#include "undocommands.h"
+
+UndoDeleteDive::UndoDeleteDive(QList<dive *> diveList)
+{
+
+}
+
+void UndoDeleteDive::undo()
+{
+
+}
+
+void UndoDeleteDive::redo()
+{
+
+}

qt-ui/undocommands.h

@@ -0,0 +1,17 @@
+#ifndef UNDOCOMMANDS_H
+#define UNDOCOMMANDS_H
+
+#include <QUndoCommand>
+#include "dive.h"
+
+class UndoDeleteDive : public QUndoCommand {
+public:
+	UndoDeleteDive(QList<struct dive*> diveList);
+	virtual void undo();
+	virtual void redo();
+
+private:
+	QList<struct dive*> dives;
+};
+
+#endif // UNDOCOMMANDS_H

subsurface.pro

@@ -104,7 +104,8 @@ HEADERS = \
 	qt-ui/statistics/statisticsbar.h \
 	qt-ui/statistics/yearstatistics.h \
 	qt-ui/diveshareexportdialog.h \
-	qt-ui/filtermodels.h
+	qt-ui/filtermodels.h \
+	qt-ui/undocommands.h
 
 android: HEADERS -= \
 	qt-ui/usermanual.h \
@@ -198,7 +199,8 @@ SOURCES =  \
 	qt-ui/statistics/statisticsbar.cpp \
 	qt-ui/statistics/monthstatistics.cpp \
 	qt-ui/diveshareexportdialog.cpp \
-	qt-ui/filtermodels.cpp
+	qt-ui/filtermodels.cpp \
+	qt-ui/undocommands.cpp
 
 android: SOURCES += android.cpp
 else: win32: SOURCES += windows.c