Implement the TagFilter model.

This model accepts check / unchedk. Now, I need to also
plug the result of the check / uncheck to the list model.

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/mainwindow.cpp

@@ -181,6 +181,7 @@ void MainWindow::refreshDisplay(bool doRecreateDiveList)
 void MainWindow::recreateDiveList()
 {
 	ui.ListWidget->reload(DiveTripModel::CURRENT);
+	TagFilterModel::instance()->repopulate();
 }
 
 void MainWindow::current_dive_changed(int divenr)

qt-ui/models.cpp

@@ -2099,3 +2099,54 @@ int LanguageModel::rowCount(const QModelIndex &parent) const
 {
 	return languages.count();
 }
+
+
+TagFilterModel::TagFilterModel(QObject *parent): QStringListModel(parent), checkState(NULL)
+{
+}
+
+TagFilterModel *TagFilterModel::instance()
+{
+	static TagFilterModel *self = new TagFilterModel();
+	return self;
+}
+
+QVariant TagFilterModel::data(const QModelIndex &index, int role) const
+{
+	if(role == Qt::CheckStateRole){
+		return checkState[index.row()] ? Qt::Checked : Qt::Unchecked;
+	} else if (role == Qt::DisplayRole) {
+		return stringList()[index.row()];
+	}
+	return QVariant();
+}
+
+Qt::ItemFlags TagFilterModel::flags(const QModelIndex &index) const
+{
+	return QStringListModel::flags(index) | Qt::ItemIsUserCheckable;
+}
+
+void TagFilterModel::repopulate()
+{
+	if (g_tag_list == NULL)
+		return;
+	QStringList list;
+	struct tag_entry *current_tag_entry = g_tag_list->next;
+	while (current_tag_entry != NULL) {
+		list.append(QString(current_tag_entry->tag->name));
+		current_tag_entry = current_tag_entry->next;
+	}
+	setStringList(list);
+	delete[] checkState;
+	checkState = new bool[list.count()];
+	memset(checkState, false, list.count());
+}
+
+bool TagFilterModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+	if(role == Qt::CheckStateRole){
+		checkState[index.row()] = value.toBool();
+		return true;
+	}
+	return false;
+}

qt-ui/models.h

@@ -417,4 +417,18 @@ private:
 
 	QStringList languages;
 };
+
+class TagFilterModel : public QStringListModel {
+	Q_OBJECT
+public:
+	static TagFilterModel *instance();
+	virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
+	virtual bool setData(const QModelIndex &index, const QVariant &value, int role = Qt::EditRole);
+	virtual Qt::ItemFlags flags(const QModelIndex &index) const;
+public slots:
+	void repopulate();
+private:
+	explicit TagFilterModel(QObject *parent = 0);
+	bool *checkState;
+};
 #endif // MODELS_H

qt-ui/simplewidgets.cpp

@@ -7,6 +7,7 @@
 #include <QFileDialog>
 #include <QShortcut>
 #include <QCalendarWidget>
+#include <QSortFilterProxyModel>
 #include "exif.h"
 #include "dive.h"
 #include "file.h"
@@ -459,4 +460,8 @@ void DiveComponentSelection::buttonClicked(QAbstractButton *button)
 TagFilter::TagFilter(QWidget *parent): QWidget(parent)
 {
 	ui.setupUi(this);
+	QSortFilterProxyModel *filter = new QSortFilterProxyModel();
+	filter->setSourceModel(TagFilterModel::instance());
+	connect(ui.filterTag, SIGNAL(textChanged(QString)), filter, SLOT(setFilterFixedString(QString)));
+	ui.tagView->setModel(filter);
 }