Fix some bugs in script system when using multiple scripts

scriptcontainer.cpp

@@ -111,12 +111,6 @@ void ScriptContainer::updateValuesTable(QTableWidget *widget)
 {
     QString valu;
 
-    if (widget->columnCount() == 0)
-    {
-        widget->insertColumn(0);
-        widget->insertColumn(1);
-    }
-
     foreach (QString paramName, scriptParams)
     {
         valu = scriptEngine.globalObject().property(paramName).toString();
@@ -124,7 +118,7 @@ void ScriptContainer::updateValuesTable(QTableWidget *widget)
         bool found = false;
         for (int i = 0; i < widget->rowCount(); i++)
         {
-            if (widget->item(i, 0)->text().compare(paramName) == 0)
+            if (widget->item(i, 0) && widget->item(i, 0)->text().compare(paramName) == 0)
             {
                 found = true;
                 if (!widget->item(i, 1)->isSelected())

scriptingwindow.cpp

@@ -43,6 +43,9 @@ ScriptingWindow::ScriptingWindow(const QVector<CANFrame> *frames, QWidget *paren
 
     elapsedTime.start();
     valuesTimer.start(1000);
+
+    ui->tableVariables->insertColumn(0);
+    ui->tableVariables->insertColumn(1);
 }
 
 ScriptingWindow::~ScriptingWindow()
@@ -117,6 +120,13 @@ void ScriptingWindow::showEvent(QShowEvent* event)
 
 void ScriptingWindow::changeCurrentScript()
 {
+    ui->tableVariables->clear();
+    for (int i = 0; i < ui->tableVariables->rowCount(); i++) ui->tableVariables->removeRow(0);
+    QStringList labels;
+    labels.append("Parameter");
+    labels.append("Value");
+    ui->tableVariables->setHorizontalHeaderLabels(labels);
+
     int sel = ui->listLoadedScripts->currentRow();
     if (sel < 0) return;
 
@@ -130,7 +140,6 @@ void ScriptingWindow::changeCurrentScript()
     currentScript = container;
     editor->setPlainText(container->scriptText);
     editor->setEnabled(true);
-    ui->tableVariables->clear();
     connect(this, SIGNAL(updateValueTable(QTableWidget*)), currentScript, SLOT(updateValuesTable(QTableWidget*)));
     connect(this, SIGNAL(updatedParameter(QString,QString)), currentScript, SLOT(updateParameter(QString,QString)));
 }

ui/scriptingwindow.ui

@@ -13,7 +13,7 @@
   <property name="windowTitle">
    <string>Scripting Interface</string>
   </property>
-  <layout class="QHBoxLayout" name="horizontalLayout" stretch="0,4">
+  <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,4">
    <item>
     <layout class="QVBoxLayout" name="verticalLayout_2">
      <item>