Warning debug output when doing dangerous things

m-kuhn · m-kuhn · commit cfd3913685ed · 2017-10-25T01:06:24.000+02:00
diff --git a/src/providers/wms/qgswmsprovider.cpp b/src/providers/wms/qgswmsprovider.cpp
@@ -611,7 +611,10 @@ static void _drawDebugRect( QPainter &p, const QRectF &rect, const QColor &color
 
 QImage *QgsWmsProvider::draw( QgsRectangle const &viewExtent, int pixelWidth, int pixelHeight, QgsRasterBlockFeedback *feedback )
 {
-  QgsDebugMsg( "Entering." );
+  if ( QgsApplication::instance()->thread() != QThread::currentThread() )
+  {
+    QgsDebugMsg( "Trying to draw a WMS image on the main thread. Stop it!" );
+  }
 
   // compose the URL query string for the WMS server.
 

Original file line number	Diff line number	Diff line change
`@@ -611,7 +611,10 @@ static void _drawDebugRect( QPainter &p, const QRectF &rect, const QColor &color`
`611`	`611`
`612`	`612`	`QImage QgsWmsProvider::draw( QgsRectangle const &viewExtent, int pixelWidth, int pixelHeight, QgsRasterBlockFeedback feedback )`
`613`	`613`	`{`
`614`		`- QgsDebugMsg( "Entering." );`
	`614`	`+ if ( QgsApplication::instance()->thread() != QThread::currentThread() )`
	`615`	`+ {`
	`616`	`+ QgsDebugMsg( "Trying to draw a WMS image on the main thread. Stop it!" );`
	`617`	`+ }`
`615`	`618`
`616`	`619`	`// compose the URL query string for the WMS server.`
`617`	`620`