Move the filters code to it's own file.

We already have a bunch of filters, let's pack them together

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

7 files changed, 560 insertions, 545 deletions

diff --git a/qt-ui/divelistview.cpp b/qt-ui/divelistview.cpp
index f250e901a..c5ffaaafa 100644
--- a/qt-ui/divelistview.cpp
+++ b/qt-ui/divelistview.cpp
@@ -6,6 +6,7 @@
  */
 #include "divelistview.h"
 #include "models.h"
+#include "filtermodels.h"
 #include "modeldelegates.h"
 #include "mainwindow.h"
 #include "subsurfacewebservices.h"
diff --git a/qt-ui/filtermodels.cpp b/qt-ui/filtermodels.cpp
new file mode 100644
index 000000000..3dabc80cc
--- /dev/null
+++ b/qt-ui/filtermodels.cpp
@@ -0,0 +1,470 @@
+#include "filtermodels.h"
+#include "dive.h"
+#include "models.h"
+#include "mainwindow.h"
+#include "display.h"
+
+TagFilterModel::TagFilterModel(QObject *parent) : QStringListModel(parent)
+{
+}
+
+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) {
+		QString tag = stringList()[index.row()];
+		int count = count_dives_with_tag(tag.toUtf8().data());
+		return tag + QString(" (%1)").arg(count);
+	}
+	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;
+	}
+	qSort(list);
+	list << tr("Empty Tags");
+	setStringList(list);
+	delete[] checkState;
+	checkState = new bool[list.count()];
+	memset(checkState, false, list.count());
+	checkState[list.count() - 1] = false;
+	anyChecked = false;
+}
+
+bool TagFilterModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+	if (role == Qt::CheckStateRole) {
+		checkState[index.row()] = value.toBool();
+		anyChecked = false;
+		for (int i = 0; i < rowCount(); i++) {
+			if (checkState[i] == true) {
+				anyChecked = true;
+				break;
+			}
+		}
+		dataChanged(index, index);
+		return true;
+	}
+	return false;
+}
+
+bool TagFilterModel::doFilter(dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const
+{
+	// If there's nothing checked, this should show everything
+	if (!anyChecked) {
+		return true;
+	}
+	if (!d) { // It's a trip, only show the ones that have dives to be shown.
+		for (int i = 0; i < sourceModel->rowCount(index0); i++) {
+			if (filterRow(i, index0, sourceModel))
+				return true;
+		}
+		return false;
+	}
+	// Checked means 'Show', Unchecked means 'Hide'.
+	struct tag_entry *head = d->tag_list;
+
+	if (!head) { // last tag means "Show empty tags";
+		if (rowCount() > 0)
+			return checkState[rowCount() - 1];
+		else
+			return true;
+	}
+
+	// have at least one tag.
+	QStringList tagList = stringList();
+	if (!tagList.isEmpty()) {
+		tagList.removeLast(); // remove the "Show Empty Tags";
+		while (head) {
+			QString tagName(head->tag->name);
+			int index = tagList.indexOf(tagName);
+			if (checkState[index])
+				return true;
+			head = head->next;
+		}
+	}
+	return false;
+}
+
+bool TagFilterModel::filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const
+{
+	// If there's nothing checked, this should show everything
+	if (!anyChecked) {
+		return true;
+	}
+
+	QModelIndex index0 = sourceModel->index(source_row, 0, source_parent);
+	QVariant diveVariant = sourceModel->data(index0, DiveTripModel::DIVE_ROLE);
+	struct dive *d = (struct dive *)diveVariant.value<void *>();
+
+	bool show = doFilter(d, index0, sourceModel);
+	filter_dive(d, show);
+	return show;
+}
+
+BuddyFilterModel::BuddyFilterModel(QObject *parent) : QStringListModel(parent)
+{
+}
+
+BuddyFilterModel *BuddyFilterModel::instance()
+{
+	static BuddyFilterModel *self = new BuddyFilterModel();
+	return self;
+}
+
+bool BuddyFilterModel::doFilter(dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const
+{
+	// If there's nothing checked, this should show everything
+	if (!anyChecked) {
+		return true;
+	}
+	if (!d) { // It's a trip, only show the ones that have dives to be shown.
+		for (int i = 0; i < sourceModel->rowCount(index0); i++) {
+			if (filterRow(i, index0, sourceModel))
+				return true;
+		}
+		return false;
+	}
+
+	// Checked means 'Show', Unchecked means 'Hide'.
+	QString diveBuddy(d->buddy);
+	QString divemaster(d->divemaster);
+	// only show empty buddie dives if the user checked that.
+	if (diveBuddy.isEmpty() && divemaster.isEmpty()) {
+		if (rowCount() > 0)
+			return checkState[rowCount() - 1];
+		else
+			return true;
+	}
+
+	// have at least one buddy
+	QStringList buddyList = stringList();
+	if (!buddyList.isEmpty()) {
+		buddyList.removeLast(); // remove the "Show Empty Tags";
+		for (int i = 0; i < rowCount(); i++) {
+			if (checkState[i] && (diveBuddy.indexOf(stringList()[i]) != -1 || divemaster.indexOf(stringList()[i]) != -1)) {
+				return true;
+			}
+		}
+	}
+	return false;
+}
+
+bool BuddyFilterModel::filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const
+{
+	// If there's nothing checked, this should show everything
+	if (!anyChecked) {
+		return true;
+	}
+
+	QModelIndex index0 = sourceModel->index(source_row, 0, source_parent);
+	QVariant diveVariant = sourceModel->data(index0, DiveTripModel::DIVE_ROLE);
+	struct dive *d = (struct dive *)diveVariant.value<void *>();
+
+	return doFilter(d, index0, sourceModel);
+}
+
+Qt::ItemFlags BuddyFilterModel::flags(const QModelIndex &index) const
+{
+	return QStringListModel::flags(index) | Qt::ItemIsUserCheckable;
+}
+
+void BuddyFilterModel::repopulate()
+{
+	QStringList list;
+	struct dive *dive;
+	int i = 0;
+	for_each_dive (i, dive) {
+		QString persons = QString(dive->buddy) + "," + QString(dive->divemaster);
+		Q_FOREACH(const QString& person, persons.split(',', QString::SkipEmptyParts)){
+			// Remove any leading spaces
+			if (!list.contains(person.trimmed())) {
+				list.append(person.trimmed());
+			}
+		}
+	}
+	qSort(list);
+	list << tr("No buddies");
+	setStringList(list);
+	delete[] checkState;
+	checkState = new bool[list.count()];
+	memset(checkState, false, list.count());
+	checkState[list.count() - 1] = false;
+	anyChecked = false;
+}
+
+QVariant BuddyFilterModel::data(const QModelIndex &index, int role) const
+{
+	if (role == Qt::CheckStateRole) {
+		return checkState[index.row()] ? Qt::Checked : Qt::Unchecked;
+	} else if (role == Qt::DisplayRole) {
+		QString person = stringList()[index.row()];
+		int count = count_dives_with_person(person.toUtf8().data());
+		return person + QString(" (%1)").arg(count);
+	}
+	return QVariant();
+}
+
+
+bool BuddyFilterModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+	if (role == Qt::CheckStateRole) {
+		checkState[index.row()] = value.toBool();
+		anyChecked = false;
+		for (int i = 0; i < rowCount(); i++) {
+			if (checkState[i] == true) {
+				anyChecked = true;
+				break;
+			}
+		}
+		dataChanged(index, index);
+		return true;
+	}
+	return false;
+}
+
+LocationFilterModel::LocationFilterModel(QObject *parent) : QStringListModel(parent)
+{
+}
+
+QVariant LocationFilterModel::data(const QModelIndex &index, int role) const
+{
+	if (role == Qt::CheckStateRole) {
+		return checkState[index.row()] ? Qt::Checked : Qt::Unchecked;
+	} else if (role == Qt::DisplayRole) {
+		QString location = stringList()[index.row()];
+		int count = count_dives_with_location(location.toUtf8().data());
+		return location + QString(" (%1)").arg(count);
+	}
+	return QVariant();
+}
+
+bool LocationFilterModel::doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const
+{
+	if (!anyChecked) {
+		return true;
+	}
+
+	if (!d) { // It's a trip, only show the ones that have dives to be shown.
+		for (int i = 0; i < sourceModel->rowCount(index0); i++) {
+			if (filterRow(i, index0, sourceModel))
+				return true;
+		}
+		return false;
+	}
+
+	// Checked means 'Show', Unchecked means 'Hide'.
+	QString location(d->location);
+	// only show empty location dives if the user checked that.
+	if (location.isEmpty()) {
+		if (rowCount() > 0)
+			return checkState[rowCount() - 1];
+		else
+			return true;
+	}
+
+	// there is a location selected
+	QStringList locationList = stringList();
+	if (!locationList.isEmpty()) {
+		locationList.removeLast(); // remove the "Show Empty Tags";
+		for (int i = 0; i < rowCount(); i++) {
+			if (checkState[i] && (location.indexOf(stringList()[i]) != -1)) {
+				return true;
+			}
+		}
+	}
+	return false;
+}
+
+bool LocationFilterModel::filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const
+{
+
+	// If there's nothing checked, this should show everything
+	if (!anyChecked) {
+		return true;
+	}
+
+	QModelIndex index0 = sourceModel->index(source_row, 0, source_parent);
+	QVariant diveVariant = sourceModel->data(index0, DiveTripModel::DIVE_ROLE);
+	struct dive *d = (struct dive *)diveVariant.value<void *>();
+
+	return doFilter(d, index0, sourceModel);
+}
+
+Qt::ItemFlags LocationFilterModel::flags(const QModelIndex &index) const
+{
+	return QStringListModel::flags(index) | Qt::ItemIsUserCheckable;
+}
+
+LocationFilterModel *LocationFilterModel::instance()
+{
+	static LocationFilterModel *self = new LocationFilterModel();
+	return self;
+}
+
+void LocationFilterModel::repopulate()
+{
+	QStringList list;
+	struct dive *dive;
+	int i = 0;
+	for_each_dive (i, dive) {
+		QString location(dive->location);
+		if (!location.isEmpty() && !list.contains(location)) {
+			list.append(location);
+		}
+	}
+	qSort(list);
+	list << tr("No location set");
+	setStringList(list);
+	delete[] checkState;
+	checkState = new bool[list.count()];
+	memset(checkState, false, list.count());
+	checkState[list.count() - 1] = false;
+	anyChecked = false;
+}
+
+bool LocationFilterModel::setData(const QModelIndex &index, const QVariant &value, int role)
+{
+	if (role == Qt::CheckStateRole) {
+		checkState[index.row()] = value.toBool();
+		anyChecked = false;
+		for (int i = 0; i < rowCount(); i++) {
+			if (checkState[i] == true) {
+				anyChecked = true;
+				break;
+			}
+		}
+		dataChanged(index, index);
+		return true;
+	}
+	return false;
+}
+
+MultiFilterSortModel *MultiFilterSortModel::instance()
+{
+	static MultiFilterSortModel *self = new MultiFilterSortModel();
+	return self;
+}
+
+MultiFilterSortModel::MultiFilterSortModel(QObject *parent) : QSortFilterProxyModel(parent), justCleared(false)
+{
+}
+
+bool MultiFilterSortModel::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const
+{
+	if (justCleared || models.isEmpty())
+		return true;
+
+	bool shouldShow = true;
+	QModelIndex index0 = sourceModel()->index(source_row, 0, source_parent);
+	QVariant diveVariant = sourceModel()->data(index0, DiveTripModel::DIVE_ROLE);
+	struct dive *d = (struct dive *)diveVariant.value<void *>();
+
+	Q_FOREACH (MultiFilterInterface *model, models) {
+		if (!model->doFilter(d, index0, sourceModel()))
+			shouldShow = false;
+	}
+	// if it's a dive, mark it accordingly
+	filter_dive(d, shouldShow);
+	return shouldShow;
+}
+
+void MultiFilterSortModel::myInvalidate()
+{
+	int i;
+	struct dive *d;
+	DiveListView *dlv = MainWindow::instance()->dive_list();
+
+	invalidate();
+	// first make sure the trips are no longer shown as selected
+	// (but without updating the selection state of the dives... this just cleans
+	//  up an oddity in the filter handling)
+	// TODO: This should go internally to DiveList, to be triggered after a filter is due.
+	dlv->clearTripSelection();
+
+	// if we have no more selected dives, clean up the display - this later triggers us
+	// to pick one of the dives that are shown in the list as selected dive which is the
+	// natural behavior
+	if (amount_selected == 0) {
+		MainWindow::instance()->cleanUpEmpty();
+	} else {
+		// otherwise find the dives that should still be selected (the filter above unselected any
+		// dive that's no longer visible) and select them again
+		QList<int>curSelectedDives;
+		for_each_dive (i, d) {
+			if(d->selected)
+				curSelectedDives.append(get_divenr(d));
+		}
+		dlv->selectDives(curSelectedDives);
+	}
+}
+
+void MultiFilterSortModel::addFilterModel(MultiFilterInterface *model)
+{
+	QAbstractItemModel *itemModel = dynamic_cast<QAbstractItemModel *>(model);
+	Q_ASSERT(itemModel);
+	models.append(model);
+	connect(itemModel, SIGNAL(dataChanged(QModelIndex, QModelIndex)), this, SLOT(myInvalidate()));
+}
+
+void MultiFilterSortModel::removeFilterModel(MultiFilterInterface *model)
+{
+	QAbstractItemModel *itemModel = dynamic_cast<QAbstractItemModel *>(model);
+	Q_ASSERT(itemModel);
+	models.removeAll(model);
+	disconnect(itemModel, SIGNAL(dataChanged(QModelIndex, QModelIndex)), this, SLOT(myInvalidate()));
+}
+
+void MultiFilterSortModel::clearFilter()
+{
+	justCleared = true;
+	Q_FOREACH(MultiFilterInterface *iface, models){
+		iface->clearFilter();
+	}
+	justCleared = false;
+	myInvalidate();
+}
+
+void BuddyFilterModel::clearFilter()
+{
+	memset(checkState, false, rowCount());
+	checkState[rowCount() - 1] = false;
+	anyChecked = false;
+	emit dataChanged(createIndex(0,0), createIndex(rowCount()-1, 0));
+}
+
+void LocationFilterModel::clearFilter()
+{
+	memset(checkState, false, rowCount());
+	checkState[rowCount() - 1] = false;
+	anyChecked = false;
+	emit dataChanged(createIndex(0,0), createIndex(rowCount()-1, 0));
+}
+
+void TagFilterModel::clearFilter()
+{
+	memset(checkState, false, rowCount());
+	checkState[rowCount() - 1] = false;
+	anyChecked = false;
+	emit dataChanged(createIndex(0,0), createIndex(rowCount()-1, 0));
+}
\ No newline at end of file
diff --git a/qt-ui/filtermodels.h b/qt-ui/filtermodels.h
new file mode 100644
index 000000000..353e9d0a9
--- /dev/null
+++ b/qt-ui/filtermodels.h
@@ -0,0 +1,87 @@
+#ifndef FILTERMODELS_H
+#define FILTERMODELS_H
+
+#include <QStringListModel>
+#include <QSortFilterProxyModel>
+
+class MultiFilterInterface {
+public:
+	MultiFilterInterface() : checkState(NULL){};
+	virtual bool filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const = 0;
+	virtual bool doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const = 0;
+	virtual void clearFilter() = 0;
+	bool *checkState;
+	bool anyChecked;
+};
+
+class TagFilterModel : public QStringListModel, public MultiFilterInterface{
+	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;
+	virtual bool filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const;
+	bool doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const;
+	void clearFilter();
+public
+slots:
+	void repopulate();
+
+private:
+	explicit TagFilterModel(QObject *parent = 0);
+};
+
+class BuddyFilterModel : public QStringListModel, public MultiFilterInterface{
+	Q_OBJECT
+public:
+	static BuddyFilterModel *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;
+	virtual bool filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const;
+	bool doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const;
+	void clearFilter();
+public
+slots:
+	void repopulate();
+
+private:
+	explicit BuddyFilterModel(QObject *parent = 0);
+};
+
+class LocationFilterModel : public QStringListModel, public MultiFilterInterface{
+	Q_OBJECT
+public:
+	static LocationFilterModel *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;
+	virtual bool filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const;
+	bool doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const;
+	void clearFilter();
+public
+slots:
+	void repopulate();
+
+private:
+	explicit LocationFilterModel(QObject *parent = 0);
+};
+
+class MultiFilterSortModel : public QSortFilterProxyModel {
+	Q_OBJECT
+public:
+	static MultiFilterSortModel *instance();
+	virtual bool filterAcceptsRow(int source_row, const QModelIndex &source_parent) const;
+	void addFilterModel(MultiFilterInterface *model);
+	void removeFilterModel(MultiFilterInterface *model);
+public slots:
+	void myInvalidate();
+	void clearFilter();
+private:
+	MultiFilterSortModel(QObject *parent = 0);
+	QList<MultiFilterInterface*> models;
+	bool justCleared;
+};
+
+#endif
\ No newline at end of file
diff --git a/qt-ui/mainwindow.cpp b/qt-ui/mainwindow.cpp
index 858407af4..934191697 100644
--- a/qt-ui/mainwindow.cpp
+++ b/qt-ui/mainwindow.cpp
@@ -44,6 +44,7 @@
 #include "planner.h"
 #include "configuredivecomputerdialog.h"
 #include "statistics/statisticswidget.h"
+#include "filtermodels.h"
 #ifndef NO_PRINTING
 #include <QPrintDialog>
 #include "printdialog.h"
diff --git a/qt-ui/models.cpp b/qt-ui/models.cpp
index a8e561272..8bf6627bf 100644
--- a/qt-ui/models.cpp
+++ b/qt-ui/models.cpp
@@ -2252,471 +2252,6 @@ int LanguageModel::rowCount(const QModelIndex &parent) const
 	return languages.count();
 }
 
-
-TagFilterModel::TagFilterModel(QObject *parent) : QStringListModel(parent)
-{
-}
-
-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) {
-		QString tag = stringList()[index.row()];
-		int count = count_dives_with_tag(tag.toUtf8().data());
-		return tag + QString(" (%1)").arg(count);
-	}
-	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;
-	}
-	qSort(list);
-	list << tr("Empty Tags");
-	setStringList(list);
-	delete[] checkState;
-	checkState = new bool[list.count()];
-	memset(checkState, false, list.count());
-	checkState[list.count() - 1] = false;
-	anyChecked = false;
-}
-
-bool TagFilterModel::setData(const QModelIndex &index, const QVariant &value, int role)
-{
-	if (role == Qt::CheckStateRole) {
-		checkState[index.row()] = value.toBool();
-		anyChecked = false;
-		for (int i = 0; i < rowCount(); i++) {
-			if (checkState[i] == true) {
-				anyChecked = true;
-				break;
-			}
-		}
-		dataChanged(index, index);
-		return true;
-	}
-	return false;
-}
-
-bool TagFilterModel::doFilter(dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const
-{
-	// If there's nothing checked, this should show everything
-	if (!anyChecked) {
-		return true;
-	}
-	if (!d) { // It's a trip, only show the ones that have dives to be shown.
-		for (int i = 0; i < sourceModel->rowCount(index0); i++) {
-			if (filterRow(i, index0, sourceModel))
-				return true;
-		}
-		return false;
-	}
-	// Checked means 'Show', Unchecked means 'Hide'.
-	struct tag_entry *head = d->tag_list;
-
-	if (!head) { // last tag means "Show empty tags";
-		if (rowCount() > 0)
-			return checkState[rowCount() - 1];
-		else
-			return true;
-	}
-
-	// have at least one tag.
-	QStringList tagList = stringList();
-	if (!tagList.isEmpty()) {
-		tagList.removeLast(); // remove the "Show Empty Tags";
-		while (head) {
-			QString tagName(head->tag->name);
-			int index = tagList.indexOf(tagName);
-			if (checkState[index])
-				return true;
-			head = head->next;
-		}
-	}
-	return false;
-}
-
-bool TagFilterModel::filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const
-{
-	// If there's nothing checked, this should show everything
-	if (!anyChecked) {
-		return true;
-	}
-
-	QModelIndex index0 = sourceModel->index(source_row, 0, source_parent);
-	QVariant diveVariant = sourceModel->data(index0, DiveTripModel::DIVE_ROLE);
-	struct dive *d = (struct dive *)diveVariant.value<void *>();
-
-	bool show = doFilter(d, index0, sourceModel);
-	filter_dive(d, show);
-	return show;
-}
-
-BuddyFilterModel::BuddyFilterModel(QObject *parent) : QStringListModel(parent)
-{
-}
-
-BuddyFilterModel *BuddyFilterModel::instance()
-{
-	static BuddyFilterModel *self = new BuddyFilterModel();
-	return self;
-}
-
-bool BuddyFilterModel::doFilter(dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const
-{
-	// If there's nothing checked, this should show everything
-	if (!anyChecked) {
-		return true;
-	}
-	if (!d) { // It's a trip, only show the ones that have dives to be shown.
-		for (int i = 0; i < sourceModel->rowCount(index0); i++) {
-			if (filterRow(i, index0, sourceModel))
-				return true;
-		}
-		return false;
-	}
-
-	// Checked means 'Show', Unchecked means 'Hide'.
-	QString diveBuddy(d->buddy);
-	QString divemaster(d->divemaster);
-	// only show empty buddie dives if the user checked that.
-	if (diveBuddy.isEmpty() && divemaster.isEmpty()) {
-		if (rowCount() > 0)
-			return checkState[rowCount() - 1];
-		else
-			return true;
-	}
-
-	// have at least one buddy
-	QStringList buddyList = stringList();
-	if (!buddyList.isEmpty()) {
-		buddyList.removeLast(); // remove the "Show Empty Tags";
-		for (int i = 0; i < rowCount(); i++) {
-			if (checkState[i] && (diveBuddy.indexOf(stringList()[i]) != -1 || divemaster.indexOf(stringList()[i]) != -1)) {
-				return true;
-			}
-		}
-	}
-	return false;
-}
-
-bool BuddyFilterModel::filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const
-{
-	// If there's nothing checked, this should show everything
-	if (!anyChecked) {
-		return true;
-	}
-
-	QModelIndex index0 = sourceModel->index(source_row, 0, source_parent);
-	QVariant diveVariant = sourceModel->data(index0, DiveTripModel::DIVE_ROLE);
-	struct dive *d = (struct dive *)diveVariant.value<void *>();
-
-	return doFilter(d, index0, sourceModel);
-}
-
-Qt::ItemFlags BuddyFilterModel::flags(const QModelIndex &index) const
-{
-	return QStringListModel::flags(index) | Qt::ItemIsUserCheckable;
-}
-
-void BuddyFilterModel::repopulate()
-{
-	QStringList list;
-	struct dive *dive;
-	int i = 0;
-	for_each_dive (i, dive) {
-		QString persons = QString(dive->buddy) + "," + QString(dive->divemaster);
-		Q_FOREACH(const QString& person, persons.split(',', QString::SkipEmptyParts)){
-			// Remove any leading spaces
-			if (!list.contains(person.trimmed())) {
-				list.append(person.trimmed());
-			}
-		}
-	}
-	qSort(list);
-	list << tr("No buddies");
-	setStringList(list);
-	delete[] checkState;
-	checkState = new bool[list.count()];
-	memset(checkState, false, list.count());
-	checkState[list.count() - 1] = false;
-	anyChecked = false;
-}
-
-QVariant BuddyFilterModel::data(const QModelIndex &index, int role) const
-{
-	if (role == Qt::CheckStateRole) {
-		return checkState[index.row()] ? Qt::Checked : Qt::Unchecked;
-	} else if (role == Qt::DisplayRole) {
-		QString person = stringList()[index.row()];
-		int count = count_dives_with_person(person.toUtf8().data());
-		return person + QString(" (%1)").arg(count);
-	}
-	return QVariant();
-}
-
-
-bool BuddyFilterModel::setData(const QModelIndex &index, const QVariant &value, int role)
-{
-	if (role == Qt::CheckStateRole) {
-		checkState[index.row()] = value.toBool();
-		anyChecked = false;
-		for (int i = 0; i < rowCount(); i++) {
-			if (checkState[i] == true) {
-				anyChecked = true;
-				break;
-			}
-		}
-		dataChanged(index, index);
-		return true;
-	}
-	return false;
-}
-
-LocationFilterModel::LocationFilterModel(QObject *parent) : QStringListModel(parent)
-{
-}
-
-QVariant LocationFilterModel::data(const QModelIndex &index, int role) const
-{
-	if (role == Qt::CheckStateRole) {
-		return checkState[index.row()] ? Qt::Checked : Qt::Unchecked;
-	} else if (role == Qt::DisplayRole) {
-		QString location = stringList()[index.row()];
-		int count = count_dives_with_location(location.toUtf8().data());
-		return location + QString(" (%1)").arg(count);
-	}
-	return QVariant();
-}
-
-bool LocationFilterModel::doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const
-{
-	if (!anyChecked) {
-		return true;
-	}
-
-	if (!d) { // It's a trip, only show the ones that have dives to be shown.
-		for (int i = 0; i < sourceModel->rowCount(index0); i++) {
-			if (filterRow(i, index0, sourceModel))
-				return true;
-		}
-		return false;
-	}
-
-	// Checked means 'Show', Unchecked means 'Hide'.
-	QString location(d->location);
-	// only show empty location dives if the user checked that.
-	if (location.isEmpty()) {
-		if (rowCount() > 0)
-			return checkState[rowCount() - 1];
-		else
-			return true;
-	}
-
-	// there is a location selected
-	QStringList locationList = stringList();
-	if (!locationList.isEmpty()) {
-		locationList.removeLast(); // remove the "Show Empty Tags";
-		for (int i = 0; i < rowCount(); i++) {
-			if (checkState[i] && (location.indexOf(stringList()[i]) != -1)) {
-				return true;
-			}
-		}
-	}
-	return false;
-}
-
-bool LocationFilterModel::filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const
-{
-
-	// If there's nothing checked, this should show everything
-	if (!anyChecked) {
-		return true;
-	}
-
-	QModelIndex index0 = sourceModel->index(source_row, 0, source_parent);
-	QVariant diveVariant = sourceModel->data(index0, DiveTripModel::DIVE_ROLE);
-	struct dive *d = (struct dive *)diveVariant.value<void *>();
-
-	return doFilter(d, index0, sourceModel);
-}
-
-Qt::ItemFlags LocationFilterModel::flags(const QModelIndex &index) const
-{
-	return QStringListModel::flags(index) | Qt::ItemIsUserCheckable;
-}
-
-LocationFilterModel *LocationFilterModel::instance()
-{
-	static LocationFilterModel *self = new LocationFilterModel();
-	return self;
-}
-
-void LocationFilterModel::repopulate()
-{
-	QStringList list;
-	struct dive *dive;
-	int i = 0;
-	for_each_dive (i, dive) {
-		QString location(dive->location);
-		if (!location.isEmpty() && !list.contains(location)) {
-			list.append(location);
-		}
-	}
-	qSort(list);
-	list << tr("No location set");
-	setStringList(list);
-	delete[] checkState;
-	checkState = new bool[list.count()];
-	memset(checkState, false, list.count());
-	checkState[list.count() - 1] = false;
-	anyChecked = false;
-}
-
-bool LocationFilterModel::setData(const QModelIndex &index, const QVariant &value, int role)
-{
-	if (role == Qt::CheckStateRole) {
-		checkState[index.row()] = value.toBool();
-		anyChecked = false;
-		for (int i = 0; i < rowCount(); i++) {
-			if (checkState[i] == true) {
-				anyChecked = true;
-				break;
-			}
-		}
-		dataChanged(index, index);
-		return true;
-	}
-	return false;
-}
-
-MultiFilterSortModel *MultiFilterSortModel::instance()
-{
-	static MultiFilterSortModel *self = new MultiFilterSortModel();
-	return self;
-}
-
-MultiFilterSortModel::MultiFilterSortModel(QObject *parent) : QSortFilterProxyModel(parent), justCleared(false)
-{
-}
-
-bool MultiFilterSortModel::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const
-{
-	if (justCleared || models.isEmpty())
-		return true;
-
-	bool shouldShow = true;
-	QModelIndex index0 = sourceModel()->index(source_row, 0, source_parent);
-	QVariant diveVariant = sourceModel()->data(index0, DiveTripModel::DIVE_ROLE);
-	struct dive *d = (struct dive *)diveVariant.value<void *>();
-
-	Q_FOREACH (MultiFilterInterface *model, models) {
-		if (!model->doFilter(d, index0, sourceModel()))
-			shouldShow = false;
-	}
-	// if it's a dive, mark it accordingly
-	filter_dive(d, shouldShow);
-	return shouldShow;
-}
-
-void MultiFilterSortModel::myInvalidate()
-{
-	int i;
-	struct dive *d;
-	DiveListView *dlv = MainWindow::instance()->dive_list();
-
-	invalidate();
-	// first make sure the trips are no longer shown as selected
-	// (but without updating the selection state of the dives... this just cleans
-	//  up an oddity in the filter handling)
-	dlv->clearTripSelection();
-
-	// if we have no more selected dives, clean up the display - this later triggers us
-	// to pick one of the dives that are shown in the list as selected dive which is the
-	// natural behavior
-	if (amount_selected == 0) {
-		MainWindow::instance()->cleanUpEmpty();
-	} else {
-		// otherwise find the dives that should still be selected (the filter above unselected any
-		// dive that's no longer visible) and select them again
-		QList<int>curSelectedDives;
-		for_each_dive (i, d) {
-			if(d->selected)
-				curSelectedDives.append(get_divenr(d));
-		}
-		dlv->selectDives(curSelectedDives);
-	}
-}
-
-void MultiFilterSortModel::addFilterModel(MultiFilterInterface *model)
-{
-	QAbstractItemModel *itemModel = dynamic_cast<QAbstractItemModel *>(model);
-	Q_ASSERT(itemModel);
-	models.append(model);
-	connect(itemModel, SIGNAL(dataChanged(QModelIndex, QModelIndex)), this, SLOT(myInvalidate()));
-}
-
-void MultiFilterSortModel::removeFilterModel(MultiFilterInterface *model)
-{
-	QAbstractItemModel *itemModel = dynamic_cast<QAbstractItemModel *>(model);
-	Q_ASSERT(itemModel);
-	models.removeAll(model);
-	disconnect(itemModel, SIGNAL(dataChanged(QModelIndex, QModelIndex)), this, SLOT(myInvalidate()));
-}
-
-void MultiFilterSortModel::clearFilter()
-{
-	justCleared = true;
-	Q_FOREACH(MultiFilterInterface *iface, models){
-		iface->clearFilter();
-	}
-	justCleared = false;
-	myInvalidate();
-}
-
-void BuddyFilterModel::clearFilter()
-{
-	memset(checkState, false, rowCount());
-	checkState[rowCount() - 1] = false;
-	anyChecked = false;
-	emit dataChanged(createIndex(0,0), createIndex(rowCount()-1, 0));
-}
-
-void LocationFilterModel::clearFilter()
-{
-	memset(checkState, false, rowCount());
-	checkState[rowCount() - 1] = false;
-	anyChecked = false;
-	emit dataChanged(createIndex(0,0), createIndex(rowCount()-1, 0));
-}
-
-void TagFilterModel::clearFilter()
-{
-	memset(checkState, false, rowCount());
-	checkState[rowCount() - 1] = false;
-	anyChecked = false;
-	emit dataChanged(createIndex(0,0), createIndex(rowCount()-1, 0));
-}
-
 ExtraDataModel::ExtraDataModel(QObject *parent) : CleanerTableModel(parent),
 	rows(0)
 {
diff --git a/qt-ui/models.h b/qt-ui/models.h
index 8a2d3dcb9..ad0d7b7c3 100644
--- a/qt-ui/models.h
+++ b/qt-ui/models.h
@@ -438,84 +438,4 @@ private:
 	QStringList languages;
 };
 
-class MultiFilterInterface {
-public:
-	MultiFilterInterface() : checkState(NULL){};
-	virtual bool filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const = 0;
-	virtual bool doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const = 0;
-	virtual void clearFilter() = 0;
-	bool *checkState;
-	bool anyChecked;
-};
-
-class TagFilterModel : public QStringListModel, public MultiFilterInterface{
-	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;
-	virtual bool filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const;
-	bool doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const;
-	void clearFilter();
-public
-slots:
-	void repopulate();
-
-private:
-	explicit TagFilterModel(QObject *parent = 0);
-};
-
-class BuddyFilterModel : public QStringListModel, public MultiFilterInterface{
-	Q_OBJECT
-public:
-	static BuddyFilterModel *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;
-	virtual bool filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const;
-	bool doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const;
-	void clearFilter();
-public
-slots:
-	void repopulate();
-
-private:
-	explicit BuddyFilterModel(QObject *parent = 0);
-};
-
-class LocationFilterModel : public QStringListModel, public MultiFilterInterface{
-	Q_OBJECT
-public:
-	static LocationFilterModel *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;
-	virtual bool filterRow(int source_row, const QModelIndex &source_parent, QAbstractItemModel *sourceModel) const;
-	bool doFilter(struct dive *d, QModelIndex &index0, QAbstractItemModel *sourceModel) const;
-	void clearFilter();
-public
-slots:
-	void repopulate();
-
-private:
-	explicit LocationFilterModel(QObject *parent = 0);
-};
-
-
-class MultiFilterSortModel : public QSortFilterProxyModel {
-	Q_OBJECT
-public:
-	static MultiFilterSortModel *instance();
-	virtual bool filterAcceptsRow(int source_row, const QModelIndex &source_parent) const;
-	void addFilterModel(MultiFilterInterface *model);
-	void removeFilterModel(MultiFilterInterface *model);
-public slots:
-	void myInvalidate();
-	void clearFilter();
-private:
-	MultiFilterSortModel(QObject *parent = 0);
-	QList<MultiFilterInterface*> models;
-	bool justCleared;
-};
 #endif // MODELS_H
diff --git a/qt-ui/simplewidgets.cpp b/qt-ui/simplewidgets.cpp
index 850bdcf03..fb9b9043b 100644
--- a/qt-ui/simplewidgets.cpp
+++ b/qt-ui/simplewidgets.cpp
@@ -1,4 +1,5 @@
 #include "simplewidgets.h"
+#include "filtermodels.h"
 
 #include <QLabel>
 #include <QProcess>