more styles

src/widget/form/settings/avform.cpp

@@ -23,6 +23,15 @@ AVForm::AVForm() :
 {
     bodyUI = new Ui::AVSettings;
     bodyUI->setupUi(this);
+    // this QWidget style definition is a walk-around for bug in Qt 5.x
+    // the bug causes "Win-98 style" rendering if background color is defined for QWidget,
+    // so I avoided global definition for QWidget.
+    // but if this style is not defined you got: https://github.com/tux3/qTox/pull/475#issuecomment-59627952
+    // this single line can be remove if bug in Qt is fixed. some day.
+    // more reference: 
+    // https://github.com/tux3/qTox/issues/406
+    // https://bugreports.qt-project.org/browse/QTBUG-33537?attachmentOrder=desc
+    this->setStyleSheet("QWidget { background: white; }");
 }
 
 AVForm::~AVForm()

src/widget/form/settings/avsettings.ui

@@ -16,6 +16,9 @@
   <layout class="QVBoxLayout" name="verticalLayout_2">
    <item>
     <widget class="QScrollArea" name="scrollArea">
+     <property name="autoFillBackground">
+      <bool>true</bool>
+     </property>
      <property name="frameShape">
       <enum>QFrame::NoFrame</enum>
      </property>
@@ -27,8 +30,8 @@
        <rect>
         <x>0</x>
         <y>0</y>
-        <width>830</width>
-        <height>495</height>
+        <width>824</width>
+        <height>489</height>
        </rect>
       </property>
       <layout class="QHBoxLayout" name="horizontalLayout_2">

ui/settings/mainContent.css

@@ -13,6 +13,21 @@ QTextEdit
     border: 1px solid #c4c1bd;
 }
 
+QListWidget
+{
+    background: white;
+}
+
+QScrollArea
+{
+    background: white;
+}
+
+QGroupBox
+{
+    background: white;
+}
+
 QMessageBox
 {
     background: white;