filter: when a filter preset is selected, suggest its name on save

The goal here is to let the user edit already existing sets and
save them using their old name. This is a stop-gap measure until
we get a proper filter-set editing interface.

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

desktop-widgets/filterwidget2.cpp

@@ -198,7 +198,15 @@ void FilterWidget2::updateFilter()
 
 void FilterWidget2::on_addSetButton_clicked()
 {
-	AddFilterPresetDialog dialog(this);
+	// If there is a selected item, suggest that to the user.
+	// Thus, if the user selects an item and modify the filter,
+	// they can simply overwrite the preset.
+	QString selectedPreset;
+	QModelIndexList selection = ui.presetTable->selectionModel()->selectedRows();
+	if (selection.size() == 1)
+		selectedPreset = filter_preset_name_qstring(selection[0].row());
+
+	AddFilterPresetDialog dialog(selectedPreset, this);
 	QString name = dialog.doit();
 	if (name.isEmpty())
 		return;

desktop-widgets/simplewidgets.cpp

@@ -480,9 +480,10 @@ void DiveComponentSelection::buttonClicked(QAbstractButton *button)
 	}
 }
 
-AddFilterPresetDialog::AddFilterPresetDialog(QWidget *parent)
+AddFilterPresetDialog::AddFilterPresetDialog(const QString &defaultName, QWidget *parent)
 {
 	ui.setupUi(this);
+	ui.name->setText(defaultName);
 	connect(ui.name, &QLineEdit::textChanged, this, &AddFilterPresetDialog::nameChanged);
 	connect(ui.buttonBox, &QDialogButtonBox::accepted, this, &AddFilterPresetDialog::accept);
 	connect(ui.buttonBox, &QDialogButtonBox::rejected, this, &AddFilterPresetDialog::reject);

desktop-widgets/simplewidgets.h

@@ -142,7 +142,7 @@ private:
 class AddFilterPresetDialog : public QDialog {
 	Q_OBJECT
 public:
-	explicit AddFilterPresetDialog(QWidget *parent);
+	explicit AddFilterPresetDialog(const QString &defaultName, QWidget *parent);
 	QString doit(); // returns name of filter preset or empty string if user cancelled the dialog
 private
 slots: