Cylinders: Add CylindersModelFiltered

When the show_unused_cylinders flag is not set, the cylinder tables
in the equipment tab and the planner should not show unused cylinders.
However, the code in CylindersModel is fundamentally broken if the
unused cylinders are not at the end of the list: The correct number
of cylinders is shown, but not the correct cylinders.

Therefore, add a higher-level CylindersModelFiltered model on top
of CylindersModel that does the actual filtering. Some calls are
routed through to the base model (notably those that take indexes,
as these have to be mapped), for some calls the caller has to get
access to the source model first. We might want to adjust this.

For filtering, reuse the already existing show_cylinder function
and export it via CylindersModel.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

1 files changed, 3 insertions, 3 deletions

diff --git a/desktop-widgets/modeldelegates.cpp b/desktop-widgets/modeldelegates.cpp
index ae8755292..ed4833550 100644
--- a/desktop-widgets/modeldelegates.cpp
+++ b/desktop-widgets/modeldelegates.cpp
@@ -238,7 +238,7 @@ static struct RevertCylinderData {
 
 void TankInfoDelegate::setModelData(QWidget*, QAbstractItemModel*, const QModelIndex&) const
 {
-	CylindersModel *mymodel = qobject_cast<CylindersModel *>(currCombo.model);
+	CylindersModelFiltered *mymodel = qobject_cast<CylindersModelFiltered *>(currCombo.model);
 	TankInfoModel *tanks = TankInfoModel::instance();
 	QModelIndexList matches = tanks->match(tanks->index(0, 0), Qt::DisplayRole, currCombo.activeText);
 	int row;
@@ -277,7 +277,7 @@ void TankInfoDelegate::editorClosed(QWidget*, QAbstractItemDelegate::EndEditHint
 {
 	if (hint == QAbstractItemDelegate::NoHint ||
 	    hint == QAbstractItemDelegate::RevertModelCache) {
-		CylindersModel *mymodel = qobject_cast<CylindersModel *>(currCombo.model);
+		CylindersModelFiltered *mymodel = qobject_cast<CylindersModelFiltered *>(currCombo.model);
 		mymodel->setData(IDX(CylindersModel::TYPE), currCylinderData.type, Qt::EditRole);
 		mymodel->passInData(IDX(CylindersModel::WORKINGPRESS), currCylinderData.pressure);
 		mymodel->passInData(IDX(CylindersModel::SIZE), currCylinderData.size);
@@ -289,7 +289,7 @@ QWidget *TankInfoDelegate::createEditor(QWidget *parent, const QStyleOptionViewI
 	// ncreate editor needs to be called before because it will populate a few
 	// things in the currCombo global var.
 	QWidget *delegate = ComboBoxDelegate::createEditor(parent, option, index);
-	CylindersModel *mymodel = qobject_cast<CylindersModel *>(currCombo.model);
+	CylindersModelFiltered *mymodel = qobject_cast<CylindersModelFiltered *>(currCombo.model);
 	cylinder_t *cyl = mymodel->cylinderAt(index);
 	currCylinderData.type = cyl->type.description;
 	currCylinderData.pressure = cyl->type.workingpressure.mbar;