Show labels from labeling plugin also in map composer (though not scaled correctly)

wonder · wonder · commit f373b74d8c8f · 2010-02-07T21:03:03.000Z
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@12897 c8812cc2-4d05-0410-92ff-de0c093fc19c
diff --git a/src/core/composer/qgscomposermap.cpp b/src/core/composer/qgscomposermap.cpp
@@ -112,6 +112,8 @@ void QgsComposerMap::draw( QPainter *painter, const QgsRectangle& extent, const
   QgsMapRenderer theMapRenderer;
   theMapRenderer.setExtent( extent );
   theMapRenderer.setOutputSize( size, dpi );
+  if ( mMapRenderer->labelingEngine() )
+    theMapRenderer.setLabelingEngine( mMapRenderer->labelingEngine()->clone() );
 
   //use stored layer set or read current set from main canvas
   if ( mKeepLayerSet )
diff --git a/src/core/qgsmaprenderer.cpp b/src/core/qgsmaprenderer.cpp
@@ -279,7 +279,7 @@ void QgsMapRenderer::render( QPainter* painter )
 
   mRenderContext.setLabelingEngine( mLabelingEngine );
   if ( mLabelingEngine )
-    mLabelingEngine->init();
+    mLabelingEngine->init( this );
 
   // know we know if this render is just a repeat of the last time, we
   // can clear caches if it has changed
diff --git a/src/core/qgsmaprenderer.h b/src/core/qgsmaprenderer.h
@@ -30,6 +30,7 @@ class QPainter;
 
 class QgsMapToPixel;
 class QgsMapLayer;
+class QgsMapRenderer;
 class QgsScaleCalculator;
 class QgsCoordinateReferenceSystem;
 class QgsDistanceArea;
@@ -46,7 +47,7 @@ class QgsLabelingEngineInterface
     virtual ~QgsLabelingEngineInterface() {}
 
     //! called when we're going to start with rendering
-    virtual void init() = 0;
+    virtual void init( QgsMapRenderer* mp ) = 0;
     //! called to find out whether the layer is used for labeling
     virtual bool willUseLayer( QgsVectorLayer* layer ) = 0;
     //! called when starting rendering of a layer
@@ -58,6 +59,8 @@ class QgsLabelingEngineInterface
     //! called when we're done with rendering
     virtual void exit() = 0;
 
+    //! called when passing engine among map renderers
+    virtual QgsLabelingEngineInterface* clone() = 0;
 };
 
 
diff --git a/src/plugins/labeling/labeling.cpp b/src/plugins/labeling/labeling.cpp
@@ -105,7 +105,7 @@ class LabelingTool : public QgsMapTool
  */
 void Labeling::initGui()
 {
-  mLBL = new PalLabeling( mQGisIface->mapCanvas()->mapRenderer() );
+  mLBL = new PalLabeling();
 
   // Create the action for tool
   mQActionPointer = new QAction( QIcon( ":/labeling/labeling.png" ), tr( "Labeling" ), this );
diff --git a/src/plugins/labeling/pallabeling.cpp b/src/plugins/labeling/pallabeling.cpp
@@ -257,8 +257,8 @@ void LayerSettings::registerFeature( QgsFeature& f )
 
 // -------------
 
-PalLabeling::PalLabeling( QgsMapRenderer* mapRenderer )
-    : mMapRenderer( mapRenderer ), mPal( NULL )
+PalLabeling::PalLabeling()
+    : mMapRenderer( NULL ), mPal( NULL )
 {
 
   // find out engine defaults
@@ -298,6 +298,8 @@ bool PalLabeling::willUseLayer( QgsVectorLayer* layer )
 
 int PalLabeling::prepareLayer( QgsVectorLayer* layer, int& attrIndex )
 {
+  Q_ASSERT( mMapRenderer != NULL );
+
   // start with a temporary settings class, find out labeling info
   LayerSettings lyrTmp;
   lyrTmp.readFromLayer( layer );
@@ -374,8 +376,10 @@ void PalLabeling::registerFeature( QgsVectorLayer* layer, QgsFeature& f )
 }
 
 
-void PalLabeling::init()
+void PalLabeling::init( QgsMapRenderer* mr )
 {
+  mMapRenderer = mr;
+
   // delete if exists already
   if ( mPal )
     delete mPal;
@@ -404,6 +408,7 @@ void PalLabeling::exit()
 {
   delete mPal;
   mPal = NULL;
+  mMapRenderer = NULL;
 }
 
 LayerSettings& PalLabeling::layer( const char* layerName )
@@ -421,6 +426,7 @@ LayerSettings& PalLabeling::layer( const char* layerName )
 
 void PalLabeling::drawLabeling( QgsRenderContext& context )
 {
+  Q_ASSERT( mMapRenderer != NULL );
   QPainter* painter = context.painter();
   QgsRectangle extent = context.extent();
 
@@ -611,3 +617,8 @@ void PalLabeling::drawLabelBuffer( QPainter* p, QString text, const QFont& font,
   p->setBrush( color );
   p->drawPath( path );
 }
+
+QgsLabelingEngineInterface* PalLabeling::clone()
+{
+  return new PalLabeling();
+}
diff --git a/src/plugins/labeling/pallabeling.h b/src/plugins/labeling/pallabeling.h
@@ -99,7 +99,7 @@ class LabelCandidate
 class PalLabeling : public QgsLabelingEngineInterface
 {
   public:
-    PalLabeling( QgsMapRenderer* renderer );
+    PalLabeling();
     ~PalLabeling();
 
     LayerSettings& layer( const char* layerName );
@@ -122,7 +122,7 @@ class PalLabeling : public QgsLabelingEngineInterface
     // implemented methods from labeling engine interface
 
     //! called when we're going to start with rendering
-    virtual void init();
+    virtual void init( QgsMapRenderer* mr );
     //! called to find out whether the layer is used for labeling
     virtual bool willUseLayer( QgsVectorLayer* layer );
     //! hook called when drawing layer before issuing select()
@@ -134,6 +134,8 @@ class PalLabeling : public QgsLabelingEngineInterface
     //! called when we're done with rendering
     virtual void exit();
 
+    //! called when passing engine among map renderers
+    virtual QgsLabelingEngineInterface* clone();
 
     void drawLabelCandidateRect( pal::LabelPosition* lp, QPainter* painter, const QgsMapToPixel* xform );
     void drawLabel( pal::LabelPosition* label, QPainter* painter, const QgsMapToPixel* xform, bool drawBuffer = false );

Original file line number	Diff line number	Diff line change
`@@ -105,7 +105,7 @@ class LabelingTool : public QgsMapTool`
`105`	`105`	`*/`
`106`	`106`	`void Labeling::initGui()`
`107`	`107`	`{`
`108`		`- mLBL = new PalLabeling( mQGisIface->mapCanvas()->mapRenderer() );`
	`108`	`+ mLBL = new PalLabeling();`
`109`	`109`
`110`	`110`	`// Create the action for tool`
`111`	`111`	`mQActionPointer = new QAction( QIcon( ":/labeling/labeling.png" ), tr( "Labeling" ), this );`
Original file line number	Diff line number	Diff line change
`@@ -257,8 +257,8 @@ void LayerSettings::registerFeature( QgsFeature& f )`
`257`	`257`
`258`	`258`	`// -------------`
`259`	`259`
`260`		`-PalLabeling::PalLabeling( QgsMapRenderer* mapRenderer )`
`261`		`- : mMapRenderer( mapRenderer ), mPal( NULL )`
	`260`	`+PalLabeling::PalLabeling()`
	`261`	`+ : mMapRenderer( NULL ), mPal( NULL )`
`262`	`262`	`{`
`263`	`263`
`264`	`264`	`// find out engine defaults`
`@@ -298,6 +298,8 @@ bool PalLabeling::willUseLayer( QgsVectorLayer* layer )`
`298`	`298`
`299`	`299`	`int PalLabeling::prepareLayer( QgsVectorLayer* layer, int& attrIndex )`
`300`	`300`	`{`
	`301`	`+ Q_ASSERT( mMapRenderer != NULL );`
	`302`	`+`
`301`	`303`	`// start with a temporary settings class, find out labeling info`
`302`	`304`	`LayerSettings lyrTmp;`
`303`	`305`	`lyrTmp.readFromLayer( layer );`
`@@ -374,8 +376,10 @@ void PalLabeling::registerFeature( QgsVectorLayer* layer, QgsFeature& f )`
`374`	`376`	`}`
`375`	`377`
`376`	`378`
`377`		`-void PalLabeling::init()`
	`379`	`+void PalLabeling::init( QgsMapRenderer* mr )`
`378`	`380`	`{`
	`381`	`+ mMapRenderer = mr;`
	`382`	`+`
`379`	`383`	`// delete if exists already`
`380`	`384`	`if ( mPal )`
`381`	`385`	`delete mPal;`
`@@ -404,6 +408,7 @@ void PalLabeling::exit()`
`404`	`408`	`{`
`405`	`409`	`delete mPal;`
`406`	`410`	`mPal = NULL;`
	`411`	`+ mMapRenderer = NULL;`
`407`	`412`	`}`
`408`	`413`
`409`	`414`	`LayerSettings& PalLabeling::layer( const char* layerName )`
`@@ -421,6 +426,7 @@ LayerSettings& PalLabeling::layer( const char* layerName )`
`421`	`426`
`422`	`427`	`void PalLabeling::drawLabeling( QgsRenderContext& context )`
`423`	`428`	`{`
	`429`	`+ Q_ASSERT( mMapRenderer != NULL );`
`424`	`430`	`QPainter* painter = context.painter();`
`425`	`431`	`QgsRectangle extent = context.extent();`
`426`	`432`
`@@ -611,3 +617,8 @@ void PalLabeling::drawLabelBuffer( QPainter* p, QString text, const QFont& font,`
`611`	`617`	`p->setBrush( color );`
`612`	`618`	`p->drawPath( path );`
`613`	`619`	`}`
	`620`	`+`
	`621`	`+QgsLabelingEngineInterface* PalLabeling::clone()`
	`622`	`+{`
	`623`	`+ return new PalLabeling();`
	`624`	`+}`