[perf]修改母线温度的样式处理

product/src/gui/plugin/BusbarTemperatureWidget/BusbarTemperatureWidget.cpp

@@ -20,6 +20,9 @@ BusbarTemperatureWidget::BusbarTemperatureWidget(QWidget *parent, bool isEditMod
     m_pLineSeries = new QLineSeries();
 
     ui->m_pSearchTextEdit->setPlaceholderText("搜索母线");
+
+    initializeChart();
+
     connect(ui->m_pSearchTextEdit, &QLineEdit::textChanged, this, &BusbarTemperatureWidget::FindTagName);
 
     connect(ui->treeFiles, &QTreeWidget::itemClicked, this, &BusbarTemperatureWidget::onTreeClicked);
@@ -32,7 +35,6 @@ QString BusbarTemperatureWidget::setYAxisRange(const int& minValue, const int& m
     yAxisMin = minValue;
     yAxisMax = maxValue;
 
-    initializeChart();
    // m_pChart->axisY()->setRange(yAxisMin,yAxisMax);
     return QString();
 }
@@ -247,9 +249,11 @@ void BusbarTemperatureWidget::initStyle()
     file.open(QFile::ReadOnly);
     if (file.isOpen())
     {
-        setStyleSheet(QLatin1String(file.readAll()));
+        qss += QLatin1String(file.readAll());
         file.close();
     }
+
+    setStyleSheet(qss);
 }
 
 //增加一条特定值的y值的警戒线
@@ -494,6 +498,15 @@ void BusbarTemperatureWidget::onTreeClicked(QTreeWidgetItem *item, int column)
 
   //改变图表名字，柱状图清零
   QChart* chart = m_pChart;
+  if(!chart)
+  {
+      return;
+  }
+
+  if(chart->series().count() == 0)
+  {
+      return;
+  }
 
   QString Title = item->text(0);
   chart->setTitle(Title);