Move model related code from MainWindow and adjustments.

Moves the DiveTrip model related code to models.h

The DiveTripModel was implemented in three parts:

 DiveTripModel.h
 DiveTripModel.cpp
 MainWindow.cpp (the code to populate the model)

This patch changes the DiveTripModel from it's original
implementation to the file models.h, wich should store
all models (Dirk requested the Qt developers to not create
2 files per class, but instead to use a file for functionality,
and data-models are one functionality.)

Besides that, this code cleans up a bit the style:
removed operator<< for .push_back, const references where they apply,
moved the internal DiveItem class to the .cpp since it should be visible
only to the DiveTripModel class, and redesigned the current interface of
the model to be identical of the GTK one (used the UTF8-star and 2
subscribed, for instance).

Amit (the creator of the original code) should comment here if it's ok
with my changes.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 224 insertions, 0 deletions

diff --git a/qt-ui/models.cpp b/qt-ui/models.cpp
index d1b8dc0a0..40307d022 100644
--- a/qt-ui/models.cpp
+++ b/qt-ui/models.cpp
@@ -6,6 +6,7 @@
  */
 #include "models.h"
 #include "../dive.h"
+#include "../divelist.h"
 
 extern struct tank_info tank_info[100];
 
@@ -280,3 +281,226 @@ void TankInfoModel::update()
 		endInsertRows();
 	}
 }
+
+/*! A DiveItem for use with a DiveTripModel
+ *
+ * A simple class which wraps basic stats for a dive (e.g. duration, depth) and
+ * tidies up after it's children. This is done manually as we don't inherit from
+ * QObject.
+ *
+*/
+class DiveItem
+{
+public:
+	explicit DiveItem(): number(0), dateTime(QString()), duration(0.0), depth(0.0), location(QString()) {parentItem = 0;}
+	explicit DiveItem(int num, QString dt, float, float, QString loc, DiveItem *parent = 0);
+	~DiveItem() { qDeleteAll(childlist); }
+
+	int diveNumber() const { return number; }
+	const QString& diveDateTime() const { return dateTime; }
+	float diveDuration() const { return duration; }
+	float diveDepth() const { return depth; }
+	const QString& diveLocation() const { return location; }
+	DiveItem *parent() const { return parentItem; }
+	const QList<DiveItem *>& children() const { return childlist; }
+
+	void addChild(DiveItem* item) {
+		item->parentItem = this;
+		childlist.push_back(item);
+	} /* parent = self */
+
+private:
+	int number;
+	QString dateTime;
+	float duration;
+	float depth;
+	QString location;
+
+	DiveItem *parentItem;
+	QList <DiveItem*> childlist;
+
+};
+
+DiveItem::DiveItem(int num, QString dt, float dur, float dep, QString loc, DiveItem *p):
+		   number(num), dateTime(dt), duration(dur), depth(dep), location(loc), parentItem(p)
+{
+	if (parentItem)
+		parentItem->addChild(this);
+}
+
+DiveTripModel::DiveTripModel(QObject *parent) : QAbstractItemModel(parent)
+{
+	rootItem = new DiveItem;
+	int i;
+	struct dive *d;
+
+	for_each_dive(i, d) {
+		struct tm tm;
+		char *buffer;
+		utc_mkdate(d->when, &tm);
+		buffer = get_dive_date_string(&tm);
+		new DiveItem(d->number,
+				buffer,
+				d->duration.seconds/60.0,
+				d->maxdepth.mm/1000.0 ,
+				d->location,
+				rootItem);
+		free(buffer);
+	}
+}
+
+
+Qt::ItemFlags DiveTripModel::flags(const QModelIndex &index) const
+{
+	Qt::ItemFlags diveFlags = QAbstractItemModel::flags(index);
+	if (index.isValid()) {
+		diveFlags |= Qt::ItemIsSelectable|Qt::ItemIsEnabled;
+	}
+	return diveFlags;
+}
+
+
+QVariant DiveTripModel::data(const QModelIndex &index, int role) const
+{
+	if (!index.isValid())
+		return QVariant();
+
+	DiveItem *item = static_cast<DiveItem*>(index.internalPointer());
+
+	QVariant retVal;
+	if (role == Qt::DisplayRole){
+		switch (index.column()) {
+			case NR:
+				retVal = item->diveNumber();
+				break;
+			case DATE:
+				retVal = item->diveDateTime();
+				break;
+			case DURATION:
+				retVal = item->diveDuration();
+				break;
+			case DEPTH:
+				retVal = item->diveDepth();
+				break;
+			case LOCATION:
+				retVal = item->diveLocation();
+				break;
+		}
+	}
+	return retVal;
+}
+
+
+QVariant DiveTripModel::headerData(int section, Qt::Orientation orientation, int role) const
+{
+	QVariant ret;
+	if (orientation != Qt::Horizontal){
+		return ret;
+	}
+
+	if (role == Qt::DisplayRole) {
+		switch(section){
+			case NR:
+				ret = tr("#");
+				break;
+			case DATE:
+				ret = tr("Date");
+				break;
+			case RATING:
+				ret = UTF8_BLACKSTAR;
+				break;
+			case DEPTH:
+				ret = tr("ft");
+				break;
+			case DURATION:
+				ret = tr("min");
+				break;
+			case TEMPERATURE:
+				ret = UTF8_DEGREE "F";
+				break;
+			case TOTALWEIGHT:
+				ret = tr("lbs");
+				break;
+			case SUIT:
+				ret = tr("Suit");
+				break;
+			case CYLINDER:
+				ret = tr("Cyl");
+				break;
+			case NITROX:
+				ret = "O" UTF8_SUBSCRIPT_2 "%";
+				break;
+			case SAC:
+				ret = tr("SAC");
+				break;
+			case OTU:
+				ret = tr("OTU");
+				break;
+			case MAXCNS:
+				ret = tr("maxCNS");
+				break;
+			case LOCATION:
+				ret = tr("Location");
+				break;
+		}
+	}
+	return ret;
+}
+
+int DiveTripModel::rowCount(const QModelIndex &parent) const
+{
+	/* only allow kids in column 0 */
+	if (parent.isValid() && parent.column() > 0){
+		return 0;
+	}
+	DiveItem *item = itemForIndex(parent);
+	return item ? item->children().count() : 0;
+}
+
+
+
+int DiveTripModel::columnCount(const QModelIndex &parent) const
+{
+	return parent.isValid() && parent.column() != 0 ? 0 : COLUMNS;
+}
+
+
+QModelIndex DiveTripModel::index(int row, int column, const QModelIndex &parent) const
+{
+
+	if (!rootItem || row < 0 || column < 0 || column >= COLUMNS ||
+	    (parent.isValid() && parent.column() != 0))
+		return QModelIndex();
+
+	DiveItem *parentItem = itemForIndex(parent);
+	Q_ASSERT(parentItem);
+	if (DiveItem *item = parentItem->children().at(row)){
+		return createIndex(row, column, item);
+	}
+	return QModelIndex();
+}
+
+
+QModelIndex DiveTripModel::parent(const QModelIndex &childIndex) const
+{
+	if (!childIndex.isValid())
+		return QModelIndex();
+
+	DiveItem *child = static_cast<DiveItem*>(childIndex.internalPointer());
+	DiveItem *parent = child->parent();
+
+	if (parent == rootItem)
+		return QModelIndex();
+
+	return createIndex(parent->children().indexOf(child), 0, parent);
+}
+
+
+DiveItem* DiveTripModel::itemForIndex(const QModelIndex &index) const
+{
+	if (index.isValid()) {
+		DiveItem *item = static_cast<DiveItem*>(index.internalPointer());
+		return item;
+	}
+	return rootItem;
+}