Fix a crash (#3147)

wonder · wonder · commit 9f7ed1ec8218 · 2010-10-22T19:45:21.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk@14427 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/gui/symbology-ng/qgssymbolv2propertiesdialog.cpp b/src/gui/symbology-ng/qgssymbolv2propertiesdialog.cpp
@@ -169,9 +169,10 @@ void QgsSymbolV2PropertiesDialog::populateLayerTypes()
 void QgsSymbolV2PropertiesDialog::updateUi()
 {
   int row = currentRowIndex();
+  int count = listLayers->model()->rowCount();
   btnUp->setEnabled( row > 0 );
-  btnDown->setEnabled( row < listLayers->model()->rowCount() - 1 && row != -1 );
-  btnRemoveLayer->setEnabled( row != -1 );
+  btnDown->setEnabled( row < count - 1 && row != -1 );
+  btnRemoveLayer->setEnabled( count > 1 && row != -1 );
 }
 
 void QgsSymbolV2PropertiesDialog::updatePreview()

Original file line number	Diff line number	Diff line change
`@@ -169,9 +169,10 @@ void QgsSymbolV2PropertiesDialog::populateLayerTypes()`
`169`	`169`	`void QgsSymbolV2PropertiesDialog::updateUi()`
`170`	`170`	`{`
`171`	`171`	`int row = currentRowIndex();`
	`172`	`+ int count = listLayers->model()->rowCount();`
`172`	`173`	`btnUp->setEnabled( row > 0 );`
`173`		`- btnDown->setEnabled( row < listLayers->model()->rowCount() - 1 && row != -1 );`
`174`		`- btnRemoveLayer->setEnabled( row != -1 );`
	`174`	`+ btnDown->setEnabled( row < count - 1 && row != -1 );`
	`175`	`+ btnRemoveLayer->setEnabled( count > 1 && row != -1 );`
`175`	`176`	`}`
`176`	`177`
`177`	`178`	`void QgsSymbolV2PropertiesDialog::updatePreview()`