don't need scale factor when render, we can scale the scene or the view.

frontend_qt4/barcodeitem.cpp

@@ -20,7 +20,6 @@
 BarcodeItem::BarcodeItem()
 		: QGraphicsItem()
 {
-	scaleFactor=1;
 	w=400;
 	h=400;
 }
@@ -37,7 +36,7 @@ QRectF BarcodeItem::boundingRect() const
 
 void BarcodeItem::paint(QPainter * painter, const QStyleOptionGraphicsItem * /*option*/, QWidget * /*widget*/)
 {
-	bc.render(*painter,boundingRect(),Zint::QZint::IgnoreAspectRatio,scaleFactor);
+	bc.render(*painter,boundingRect(),Zint::QZint::IgnoreAspectRatio);
 }
 
 

frontend_qt4/barcodeitem.h

@@ -34,7 +34,6 @@ public:
 
 public:
 	mutable Zint::QZint bc;
-	int scaleFactor;
 	int w,h;
 };
 

frontend_qt4/mainWindow.ui

@@ -276,7 +276,7 @@
      </item>
     </layout>
    </item>
-   <item rowspan="8" row="5" column="4" colspan="4" >
+   <item rowspan="7" row="5" column="4" colspan="4" >
     <layout class="QVBoxLayout" name="verticalLayout" >
      <item>
       <widget class="QLabel" name="label_2" >
@@ -302,33 +302,6 @@ p, li { white-space: pre-wrap; }
     </layout>
    </item>
    <item row="6" column="0" colspan="4" >
-    <layout class="QHBoxLayout" name="horizontalLayout_7" >
-     <item>
-      <widget class="QLabel" name="label_7" >
-       <property name="text" >
-        <string>Scale factor:</string>
-       </property>
-       <property name="alignment" >
-        <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
-       </property>
-      </widget>
-     </item>
-     <item>
-      <widget class="QSpinBox" name="scaleFactor" >
-       <property name="minimum" >
-        <number>1</number>
-       </property>
-       <property name="maximum" >
-        <number>16</number>
-       </property>
-       <property name="value" >
-        <number>1</number>
-       </property>
-      </widget>
-     </item>
-    </layout>
-   </item>
-   <item row="7" column="0" colspan="4" >
     <layout class="QHBoxLayout" name="horizontalLayout_8" >
      <item>
       <widget class="QLabel" name="label_8" >
@@ -355,7 +328,7 @@ p, li { white-space: pre-wrap; }
      </item>
     </layout>
    </item>
-   <item row="8" column="0" colspan="4" >
+   <item row="7" column="0" colspan="4" >
     <layout class="QHBoxLayout" name="horizontalLayout_10" >
      <item>
       <widget class="QLabel" name="label_9" >
@@ -388,7 +361,7 @@ p, li { white-space: pre-wrap; }
      </item>
     </layout>
    </item>
-   <item row="9" column="0" colspan="4" >
+   <item row="8" column="0" colspan="4" >
     <layout class="QHBoxLayout" name="horizontalLayout_11" >
      <item>
       <widget class="QLabel" name="label_10" >
@@ -415,7 +388,7 @@ p, li { white-space: pre-wrap; }
      </item>
     </layout>
    </item>
-   <item row="10" column="0" colspan="4" >
+   <item row="9" column="0" colspan="4" >
     <layout class="QHBoxLayout" name="horizontalLayout_14" >
      <item>
       <widget class="QLabel" name="label_13" >
@@ -458,7 +431,7 @@ p, li { white-space: pre-wrap; }
      </item>
     </layout>
    </item>
-   <item row="11" column="0" colspan="4" >
+   <item row="10" column="0" colspan="4" >
     <layout class="QHBoxLayout" name="horizontalLayout_15" >
      <item>
       <widget class="QLabel" name="label_14" >
@@ -486,7 +459,7 @@ p, li { white-space: pre-wrap; }
      </item>
     </layout>
    </item>
-   <item row="12" column="0" colspan="4" >
+   <item row="11" column="0" colspan="4" >
     <layout class="QHBoxLayout" name="horizontalLayout_9" >
      <item>
       <widget class="QPushButton" name="fgcolor" >
@@ -504,7 +477,7 @@ p, li { white-space: pre-wrap; }
      </item>
     </layout>
    </item>
-   <item row="13" column="0" colspan="8" >
+   <item row="12" column="0" colspan="8" >
     <layout class="QHBoxLayout" name="horizontalLayout" >
      <item>
       <spacer name="horizontalSpacer" >

frontend_qt4/mainwindow.cpp

@@ -59,7 +59,6 @@ MainWindow::MainWindow(QWidget* parent, Qt::WFlags fl)
 	connect(heightb, SIGNAL(valueChanged( int )), SLOT(on_generate_clicked()));
 	connect(widthb,  SIGNAL(valueChanged( int )), SLOT(on_generate_clicked()));
 	connect(security,  SIGNAL(valueChanged( int )), SLOT(on_generate_clicked()));
-	connect(scaleFactor,  SIGNAL(valueChanged( int )), SLOT(on_generate_clicked()));
 	connect(bwidth,  SIGNAL(valueChanged( int )), SLOT(on_generate_clicked()));
 	connect(codewords,  SIGNAL(valueChanged( int )), SLOT(on_generate_clicked()));
 	connect(iwidth,  SIGNAL(valueChanged( int )), SLOT(on_generate_clicked()));
@@ -89,7 +88,6 @@ void MainWindow::on_bgcolor_clicked()
 void MainWindow::on_generate_clicked()
 {
 	QString error;
-	m_bc.scaleFactor=scaleFactor->value();
 	m_bc.w=iwidth->value();
 	m_bc.h=iheight->value();
 	m_bc.bc.setText(text->toPlainText());