feat: Add "Add to quantity" and "Subtract from quantity" actions

src/common/actionmanager.cpp

@@ -447,6 +447,10 @@ void ActionManager::initialize()
     a->m_iconName = "color_management";
     A("edit_qty",                 QT_TR_NOOP("Quantity"),                        NeedSelection(1), FlagMenu);
     A("edit_qty_set",             QT_TR_NOOP("Set quantity..."));
+    A("edit_qty_add",             QT_TR_NOOP("Add to quantity..."),              NeedSelection(1));
+    a->m_iconName = "list-add";
+    A("edit_qty_subtract",        QT_TR_NOOP("Subtract from quantity..."),       NeedSelection(1));
+    a->m_iconName = "list-remove";
     A("edit_qty_multiply",        QT_TR_NOOP("Multiply quantity..."),            QT_TR_NOOP("Ctrl+*", "Edit|Quantity|Multiply"),       NeedSelection(1));
     A("edit_qty_divide",          QT_TR_NOOP("Divide quantity..."),              QT_TR_NOOP("Ctrl+/", "Edit|Quantity|Divide"),         NeedSelection(1));
     A("edit_price",               QT_TR_NOOP("Price"),                           NeedSelection(1), FlagMenu);

src/common/document.cpp

@@ -341,6 +341,18 @@ Document::Document(DocumentModel *model, const QByteArray &columnsState, bool re
                   multiplyQuantity(*i);
               }
           } },
+        { "edit_qty_add", [this](bool) -> QCoro::Task<> {
+              if (auto i = co_await UIHelpers::getInteger(tr("Add this quantity to all selected items:"),
+                                                          tr("+"), 1, 1, DocumentModel::maxQuantity)) {
+                  addQuantity(*i);
+              }
+          } },
+        { "edit_qty_subtract", [this](bool) -> QCoro::Task<> {
+              if (auto i = co_await UIHelpers::getInteger(tr("Subtract this quantity from all selected items:"),
+                                                          tr("-"), 1, 1, DocumentModel::maxQuantity)) {
+                  addQuantity(-*i);
+              }
+          } },
         { "edit_bulk", [this](bool) -> QCoro::Task<> {
               if (selectedLots().isEmpty())
                   co_return;
@@ -1335,7 +1347,35 @@ void Document::multiplyQuantity(int factor)
     });
 }
 
+void Document::addQuantity(int delta)
+{
+    if (delta == 0)
+        return;
+
+    int lotsOutOfRange = 0;
 
+    for (const Lot *item : std::as_const(m_selectedLots)) {
+        qint64 newQty = qint64(item->quantity()) + delta;
+        if (newQty > DocumentModel::maxQuantity || newQty < -DocumentModel::maxQuantity)
+            lotsOutOfRange++;
+    }
+
+    if (lotsOutOfRange) {
+        UIHelpers::information(tr("The quantities of %n lot(s) would exceed the allowed quantity range (%1 to %2) when %3 by %4.<br><br>Nothing has been modified.",
+                                  nullptr, lotsOutOfRange)
+                               .arg(-DocumentModel::maxQuantity)
+                               .arg(DocumentModel::maxQuantity)
+                               .arg(delta > 0 ? tr("increased") : tr("decreased"))
+                               .arg(qAbs(delta)));
+        return;
+    }
+
+    const char *actionName = delta > 0 ? "edit_qty_add" : "edit_qty_subtract";
+    applyTo(selectedLots(), actionName, [=](const auto &from, auto &to) {
+        (to = from).setQuantity(from.quantity() + delta);
+        return DocumentModel::LotChanged;
+    });
+}
 
 void Document::setSale(int sale)
 {

src/common/document.h

@@ -175,6 +175,7 @@ class Document : public QObject
     void costAdjust(bool isFixed, double value);
     void divideQuantity(int divisor);
     void multiplyQuantity(int factor);
+    void addQuantity(int delta);
     void setSale(int sale);
     void setBulkQuantity(int qty);
     void setQuantity(int quantity);

src/desktop/desktopapplication.cpp

@@ -200,7 +200,7 @@ void DesktopApplication::init()
 #if defined(Q_OS_MACOS)
     if (SystemInfo::inst()->value(u"build.qt.version"_qs).toString() == u"6.4.3") {
         const auto macos = QVersionNumber::fromString(QSysInfo::productVersion());
-        if (macos >= QVersionNumber(13))
+        if (macos >= QVersionNumber(13)) {
             QString text = tr("You are using the legacy version of BrickStore for old macOS 10, 11 "
                               "and 12 machines, but you are running macOS %1.")
                                .arg(QSysInfo::productVersion())

src/desktop/mainwindow.cpp

@@ -611,6 +611,8 @@ void MainWindow::setupMenuBar()
 
     setupMenu("edit_qty", {
                   "edit_qty_set",
+                  "edit_qty_add",
+                  "edit_qty_subtract",
                   "edit_qty_multiply",
                   "edit_qty_divide",
               });
@@ -1082,6 +1084,8 @@ QStringList MainWindow::defaultToolBarActionNames() const
         u"-"_qs,
         u"edit_additems"_qs,
         u"edit_subtractitems"_qs,
+        u"edit_qty_add"_qs,
+        u"edit_qty_subtract"_qs,
         u"edit_mergeitems"_qs,
         u"edit_partoutitems"_qs,
         u"-"_qs,

src/desktop/view.cpp

@@ -689,7 +689,8 @@ void View::contextMenu(const QPoint &pos)
         case DocumentModel::QuantityOrig:
         case DocumentModel::QuantityDiff:
         case DocumentModel::Quantity:
-            actionNames = { "edit_qty_set", "edit_qty_multiply", "edit_qty_divide" };
+            actionNames = { "edit_qty_set", "edit_qty_add", "edit_qty_subtract", "-",
+                            "edit_qty_multiply", "edit_qty_divide" };
             break;
         case DocumentModel::PriceOrig:
         case DocumentModel::PriceDiff:

src/mobile/ViewEditMenu.qml

@@ -65,6 +65,8 @@ AutoSizingMenu {
     ActionMenuItem { actionName: "edit_subcond_incomplete"; visible: enabled && root.is(BS.Document.Condition) }
     ActionMenuItem { actionName: "edit_color"; visible: enabled && root.is(BS.Document.Color) }
     ActionMenuItem { actionName: "edit_qty_set"; visible: enabled && root.is(BS.Document.Quantity) }
+    ActionMenuItem { actionName: "edit_qty_add"; visible: enabled && root.is(BS.Document.Quantity) }
+    ActionMenuItem { actionName: "edit_qty_subtract"; visible: enabled && root.is(BS.Document.Quantity) }
     ActionMenuItem { actionName: "edit_qty_multiply"; visible: enabled && root.is(BS.Document.Quantity) }
     ActionMenuItem { actionName: "edit_qty_divide"; visible: enabled && root.is(BS.Document.Quantity) }
     ActionMenuItem { actionName: "edit_price_set"; visible: enabled && root.is([ BS.Document.Price, BS.Document.Total ]) }