hlp:最多添加两个计数器，编辑计数器图元，只显示当前计数器的修改tab

testprintwidget.cpp

@@ -146,7 +146,7 @@ TestPrintWidget::TestPrintWidget(QWidget* parent)
         vm.letterSpace = 1;
         vm.cnt1Settings = m_printSettingModel.cnt1Settings;
         vm.cnt2Settings = m_printSettingModel.cnt2Settings;
-        emit sig_showEditCounter(vm);
+        emit sig_showEditCounter(vm, false);
     });
 
     connect(ui.btnBarcode, &QPushButton::clicked, [this](){
@@ -715,7 +715,7 @@ void TestPrintWidget::onBtnItemConfigClicked()
         vm.charWidth = counterItem->charWidth();
         vm.cnt1Settings = m_printSettingModel.cnt1Settings;
         vm.cnt2Settings = m_printSettingModel.cnt2Settings;
-        emit sig_showEditCounter(vm);
+        emit sig_showEditCounter(vm, true);
         }
         return;
     }
@@ -1050,6 +1050,12 @@ void TestPrintWidget::addCounterItem(CounterViewModel vm, QSharedPointer<QFont>
         }
     }
 
+    // 最多两个计数器
+    if (getCounterNum() >= 2 && !flag) {
+        QMessageBox::warning(this, tr("警告"),tr("无法创建更多计数器"));
+        return;
+    }
+
     QVector<int> currVals{vm.cnt1Settings.currValue, vm.cnt2Settings.currValue};
 
     QFont font;
@@ -1100,6 +1106,19 @@ void TestPrintWidget::addCounterItem(CounterViewModel vm, QSharedPointer<QFont>
     updateCountersCurrVal(currVals);
 }
 
+int TestPrintWidget::getCounterNum()
+{
+    int count = 0;
+    const QList<QGraphicsItem *> items = pPicScene->items();
+    for (QGraphicsItem *it : items) {
+        if (auto *counter = dynamic_cast<PicCounterItem *>(it)) {
+            Q_UNUSED(counter);
+            ++count;
+        }
+    }
+    return count;
+}
+
 QString TestPrintWidget::currentFile()
 {
     return xmlfileName;