Constraint wndow with in code not in editor

GloSC/GloSC.cpp

@@ -21,6 +21,8 @@ GloSC::GloSC(QWidget *parent)
 	QDir::setCurrent(QCoreApplication::applicationDirPath());
 	ui.setupUi(this);
 
+	this->setMaximumWidth(small_x);
+
 	updateEntryList();
 	updateTargetsToNewVersion();
 

GloSC/GloSC.ui

@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>302</width>
+    <width>710</width>
     <height>386</height>
    </rect>
   </property>
@@ -18,7 +18,7 @@
   </property>
   <property name="maximumSize">
    <size>
-    <width>302</width>
+    <width>9999</width>
     <height>386</height>
    </size>
   </property>