Create DivesiteImportDialog to select sites to import

Creates the dialog box to select which sites to import from the file
selected in mainwindow.cpp. The DivesiteImportModel is created as a
table to display and select which sites are to be imported. Once the
sites are selected, the Command::importDiveSites command is called to
add the sites to the core dive site table with undo/redo functions.

Signed-off-by: Doug Junkins <junkins@foghead.com>

qt-models/divesiteimportmodel.cpp

@@ -0,0 +1,142 @@
+#include "divesiteimportmodel.h"
+#include "core/qthelper.h"
+#include "core/taxonomy.h"
+
+DivesiteImportedModel::DivesiteImportedModel(QObject *o) : QAbstractTableModel(o),
+	firstIndex(0),
+	lastIndex(-1),
+	importedSitesTable(nullptr)
+{
+}
+
+int DivesiteImportedModel::columnCount(const QModelIndex &) const
+{
+	return 5;
+}
+
+int DivesiteImportedModel::rowCount(const QModelIndex &) const
+{
+	return lastIndex - firstIndex + 1;
+}
+
+QVariant DivesiteImportedModel::headerData(int section, Qt::Orientation orientation, int role) const
+{
+	if (orientation == Qt::Vertical)
+		return QVariant();
+
+	if (role == Qt::DisplayRole) {
+		switch (section) {
+		case NAME:
+			return tr("Name");
+		case LOCATION:
+			return tr("Location");
+		case COUNTRY:
+			return tr("Country");
+		case NEAREST:
+			return tr("Nearest\nExisting Site");
+		case DISTANCE:
+			return tr("Distance");
+		}
+	}
+	return QVariant();
+}
+
+QVariant DivesiteImportedModel::data(const QModelIndex &index, int role) const
+{
+	if (!index.isValid())
+		return QVariant();
+
+	if (index.row() + firstIndex > lastIndex)
+		return QVariant();
+
+	struct dive_site *ds = get_dive_site(index.row() + firstIndex, importedSitesTable);
+	if (!ds)
+		return QVariant();
+
+	// widgets access the model via index.column()
+	// Not supporting QML access via roles
+	if (role == Qt::DisplayRole) {
+		switch (index.column()) {
+		case NAME:
+			return ds->name;
+		case LOCATION:
+			return printGPSCoords(&ds->location);
+		case COUNTRY:
+			return taxonomy_get_country(&ds->taxonomy);
+		case NEAREST: {
+			// 40075000 is circumference of the earth in meters
+			struct dive_site *nearest_ds =
+				get_dive_site_by_gps_proximity(&ds->location,
+				40075000, &dive_site_table);
+			if (nearest_ds)
+				return nearest_ds->name;
+			else
+				return QString();
+		}
+		case DISTANCE: {
+			unsigned int distance = 0;
+			struct dive_site *nearest_ds =
+				get_dive_site_by_gps_proximity(&ds->location,
+				40075000, &dive_site_table);
+			if (nearest_ds)
+				distance = get_distance(&ds->location,
+					&nearest_ds->location);
+			return distance_string(distance);
+		}
+		case SELECTED:
+			return checkStates[index.row()];
+		}
+	}
+	if (role == Qt::CheckStateRole) {
+		if (index.column() == 0)
+			return checkStates[index.row()] ? Qt::Checked : Qt::Unchecked;
+	}
+	return QVariant();
+}
+
+void DivesiteImportedModel::changeSelected(QModelIndex clickedIndex)
+{
+	checkStates[clickedIndex.row()] = !checkStates[clickedIndex.row()];
+	dataChanged(index(clickedIndex.row(), 0), index(clickedIndex.row(), 0), QVector<int>() << Qt::CheckStateRole << SELECTED);
+}
+
+void DivesiteImportedModel::selectAll()
+{
+	std::fill(checkStates.begin(), checkStates.end(), true);
+	dataChanged(index(0, 0), index(lastIndex - firstIndex, 0), QVector<int>() << Qt::CheckStateRole << SELECTED);
+}
+
+void DivesiteImportedModel::selectRow(int row)
+{
+	checkStates[row] = !checkStates[row];
+	dataChanged(index(row, 0), index(row, 0), QVector<int>() << Qt::CheckStateRole << SELECTED);
+}
+
+void DivesiteImportedModel::selectNone()
+{
+	std::fill(checkStates.begin(), checkStates.end(), false);
+	dataChanged(index(0, 0), index(lastIndex - firstIndex,0 ), QVector<int>() << Qt::CheckStateRole << SELECTED);
+}
+
+Qt::ItemFlags DivesiteImportedModel::flags(const QModelIndex &index) const
+{
+	if (index.column() != 0)
+		return QAbstractTableModel::flags(index);
+	return QAbstractTableModel::flags(index) | Qt::ItemIsUserCheckable;
+}
+
+void DivesiteImportedModel::repopulate(struct dive_site_table *sites)
+{
+	beginResetModel();
+
+	importedSitesTable = sites;
+	firstIndex = 0;
+	lastIndex = importedSitesTable->nr - 1;
+	checkStates.resize(importedSitesTable->nr);
+	for (int row = 0; row < importedSitesTable->nr; row++)
+		if (get_dive_site_by_gps(&importedSitesTable->dive_sites[row]->location, &dive_site_table))
+			checkStates[row] = false;
+		else
+			checkStates[row] = true;
+	endResetModel();
+}