Make lockAspectRatio (sizeAspectCheck) per-object (#63)

* Make lockAspectRatio (sizeAspectCheck) per-object
* Added unit tests for XmlLabelCreator and XmlLabelParser.

glabels/LabelEditor.cpp

@@ -469,6 +469,10 @@ namespace glabels
 						mResizeObject = handle->owner();
 						mResizeHandle = handle;
 						mResizeHonorAspect = event->modifiers() & Qt::ControlModifier;
+						if ( mResizeObject->lockAspectRatio() )
+						{
+							mResizeHonorAspect = !mResizeHonorAspect;
+						}
 
 						mState = ArrowResize;
 					}

glabels/ObjectEditor.cpp

@@ -188,6 +188,7 @@ namespace glabels
 
 			sizeWSpin->setValue( mObject->w().inUnits(mUnits) );
 			sizeHSpin->setValue( mObject->h().inUnits(mUnits) );
+			sizeAspectCheck->setChecked( mObject->lockAspectRatio() );
 
 			model::Size originalSize = mObject->naturalSize();
 			QString originalSizeString = QString( "%1:  %2 x %3 %4" )
@@ -655,6 +656,7 @@ namespace glabels
 				
 			if ( sizeAspectCheck->isChecked() )
 			{
+				mObject->setLockAspectRatio( true );
 				if ( fabs(spinW - mObject->w()) > fabs(spinH - mObject->h()) )
 				{
 					mObject->setWHonorAspect( spinW );
@@ -668,6 +670,7 @@ namespace glabels
 			}
 			else
 			{
+				mObject->setLockAspectRatio( false );
 				mObject->setSize( spinW, spinH );
 			}
 			

glabels/ui/ObjectEditor.ui

@@ -1202,16 +1202,7 @@
              <property name="spacing">
               <number>15</number>
              </property>
-             <property name="leftMargin">
-              <number>0</number>
-             </property>
-             <property name="topMargin">
-              <number>0</number>
-             </property>
-             <property name="rightMargin">
-              <number>0</number>
-             </property>
-             <property name="bottomMargin">
+             <property name="margin">
               <number>0</number>
              </property>
              <item>
@@ -2190,6 +2181,22 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>sizeAspectCheck</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>ObjectEditor</receiver>
+   <slot>onRectSizeControlsChanged()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>231</x>
+     <y>289</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>199</x>
+     <y>319</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
  <slots>
   <slot>onChanged()</slot>