closes #1: Favorite buttons has been extended with category buttons.

shop/shopform.cpp

@@ -145,6 +145,7 @@ void ShopForm::loadLast()
     m_commodityModel->setData(srv.allSellableItems());
     ui->commodityTable->horizontalHeader()->setSectionResizeMode(1, QHeaderView::Stretch);
     ui->commodityTable->setColumnHidden(4, true);
+    ui->commodityTable->setColumnHidden(5, true);
     ui->commodityTable->setColumnHidden(2, true);
     ui->commodityTable->setColumnWidth(3, 90);
 
@@ -167,22 +168,20 @@ void ShopForm::loadButtons(const ShopSettingsPtr& settings)
     Service<FavoritItem> srvFav;
     QMap<QString, FavoritItemPtr> btnMap;
 
-    foreach (QWidget *child, ui->favorites->findChildren<QWidget*>()) {
-        if (child->objectName() != "directSale")
-        {
-            delete child;
-        }
-    }
+    clearFavButtons();
 
     foreach (FavoritItemPtr item, srvFav.all()) {
         btnMap[item->favButtonName()] = item;
     }
 
+    ShopService srv;
+    auto allItems = srv.allSellableItems();
+
     for (int i = 0; i < settings->favBtnRows(); i++)
     {
         for (int j = 0; j < settings->favBtnCols(); j++)
         {
-            FavButton *btn = new FavButton(ui->favorites);
+            auto *btn = new QToolButton(ui->favorites);
             QString btnName = QString::number(i) + "_" + QString::number(j);
             btn->setObjectName(btnName);
 
@@ -197,6 +196,16 @@ void ShopForm::loadButtons(const ShopSettingsPtr& settings)
             if (btnMap[btnName] != nullptr)
             {
                 btn->setText(btnMap[btnName]->shortName());
+
+                auto shItem = std::find_if(allItems.begin(), allItems.end(),[btnMap, btn](auto it) -> bool {
+                    return btnMap[btn->objectName()]->refId() == it->id() && btnMap[btn->objectName()]->pluginId() == it->pluginId();
+                });
+
+                if (shItem != allItems.end()) {
+                    btn->setStyleSheet("background: " + shItem->data()->color() + ";");
+                    btn->update();
+                }
+
                 connect(btn, &FavButton::clicked, [this, btnMap, btn](bool){
                     FavoritItemPtr item = btnMap[btn->objectName()];
 
@@ -249,6 +258,7 @@ void ShopForm::setupForm()
     loadLast();
     fillReceiptCombo();
     loadButtons(settings);
+    loadCatButtons();
 }
 
 void ShopForm::on_directSale_clicked()
@@ -514,7 +524,7 @@ void ShopForm::recalculate()
 
     if (m_voucher->status() == Voucher::NEW && m_voucher->id() == 0)
     {
-        srv.saveVoucher(m_voucher);
+        srv.save(m_voucher);
     }
     else
     {
@@ -664,3 +674,107 @@ void ShopForm::on_actualReceipt_customContextMenuRequested(const QPoint &pos)
     QPoint globalPos = ui->actualReceipt->mapToGlobal(pos);
     m_itemCtxMenu->exec(globalPos);
 }
+
+void ShopForm::clearFavButtons() {
+    foreach (QWidget *child, ui->favorites->findChildren<QWidget*>()) {
+        if (child->objectName() != "directSale")
+        {
+            delete child;
+        }
+    }
+}
+
+void ShopForm::loadFavCatButtons(const QString& category) {
+    SettingsService srvSettings("SHOP");
+    ShopSettingsPtr settings = srvSettings.loadSettings<ShopSettings>();
+
+    if (category.isEmpty()) {
+        loadButtons(settings);
+        return;
+    }
+
+    clearFavButtons();
+
+    ShopService srv;
+    auto all = srv.allSellableItems(category);
+
+    if (all.count() == 0) {
+        return;
+    }
+
+    auto square = std::sqrt(all.count());
+    int cols = static_cast<int>(square);
+    int rows = cols;
+
+    if (square - cols != 0) {
+        if (cols > 1) {
+            ++rows;
+        } else {
+            ++cols;
+        }
+    }
+
+    if (cols * rows < all.count()) {
+        ++cols;
+    }
+
+    int index = 0;
+    for (int i = 0; i < rows; i++) {
+        for (int j = 0; j < cols; j++) {
+            if (index >= all.count()) {
+                break;
+            }
+
+            auto item = all[index];
+            ++index;
+            auto *btn = new QToolButton(ui->favorites);
+
+            if (settings->favBtnSize() > 0)
+            {
+                btn->setMinimumHeight(settings->favBtnSize());
+                btn->setMinimumWidth(settings->favBtnSize());
+            }
+
+            btn->setText(item->shortName());
+            btn->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+            ((QGridLayout*)ui->favorites->layout())->addWidget(btn, i + 1, j);
+
+            btn->setStyleSheet("background: " + item->color() + ";");
+            btn->update();
+
+            connect(btn, &QToolButton::clicked, [this, item](bool){
+                addItem(item, 1);
+            });
+        }
+    }
+}
+
+void ShopForm::loadCatButtons() {
+    ShopService srv;
+    auto allCat = srv.allCategories();
+
+    for (const auto btnFav : ui->widgetCategories->findChildren<QWidget*>()) {
+        if (btnFav->objectName() != "btnFav") {
+            delete btnFav;
+        }
+    }
+
+    for (const auto& cat : allCat.keys()) {
+        auto catButton = new QToolButton(ui->widgetCategories);
+        catButton->setText(cat);
+        catButton->setMinimumHeight(45);
+        catButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+        catButton->setStyleSheet("background: " + allCat[cat] + ";");
+        catButton->update();
+
+        connect(catButton, &QPushButton::clicked, [this, cat](bool){
+            loadFavCatButtons(cat);
+        });
+
+        ui->widgetCategories->layout()->addWidget(catButton);
+    }
+}
+
+void ShopForm::on_btnFav_clicked() {
+    loadFavCatButtons("");
+}