Allow point symbol sizes to be specifed in double format and allow symbols smaller than 3. Added some constants in qgis.h to default and minimum allowable point sizes.

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@8976 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: timlinux

python/core/qgis.sip

@@ -108,3 +108,11 @@ public:
    *  or user (~/.qgis.qgis.db) defined projection. */
   const int USER_PROJECTION_START_ID;
 
+  //
+  // Constants for point symbols
+  //
+
+  /** Magic number that determines the minimum allowable point size for point symbols */
+  const float MINIMUM_POINT_SIZE;
+  /** Magic number that determines the minimum allowable point size for point symbols */
+  const float DEFAULT_POINT_SIZE;

python/core/qgssymbol.sip

@@ -51,9 +51,9 @@ class QgsSymbol
     /**Get point symbol*/
     virtual QString pointSymbolName() const;
     /**Set size*/
-    virtual void setPointSize(int s);
+    virtual void setPointSize(double s);
     /**Get size*/
-    virtual int pointSize() const;
+    virtual double pointSize() const;
     //! Destructor
     virtual ~QgsSymbol();
 

src/app/qgssinglesymboldialog.cpp

@@ -184,7 +184,7 @@ QgsSingleSymbolDialog::QgsSingleSymbolDialog(QgsVectorLayer * layer, bool disabl
   connect(mLabelEdit, SIGNAL(textChanged(const QString&)), this, SLOT(resendSettingsChanged()));
   connect (lstSymbols,SIGNAL(currentItemChanged ( QListWidgetItem * , QListWidgetItem * )),
       this, SLOT (symbolChanged (QListWidgetItem * , QListWidgetItem * )));
-  connect(mPointSizeSpinBox, SIGNAL(valueChanged(int)), this, SLOT(resendSettingsChanged()));
+  connect(mPointSizeSpinBox, SIGNAL(valueChanged(double)), this, SLOT(resendSettingsChanged()));
   connect(mRotationClassificationComboBox, SIGNAL(currentIndexChanged(const QString &)),
       this, SLOT(resendSettingsChanged()));
   connect(mScaleClassificationComboBox, SIGNAL(currentIndexChanged(const QString &)),

src/core/qgis.h

@@ -133,6 +133,15 @@ class CORE_EXPORT QGis
    *  or user (~/.qgis.qgis.db) defined projection. */
   const int USER_PROJECTION_START_ID=100000;
 
+//
+// Constants for point symbols
+//
+
+  /** Magic number that determines the minimum allowable point size for point symbols */
+  const float MINIMUM_POINT_SIZE=0.1;
+  /** Magic number that determines the minimum allowable point size for point symbols */
+  const float DEFAULT_POINT_SIZE=2.0;
+
 // FIXME: also in qgisinterface.h
 #ifndef QGISEXTERN
 #ifdef WIN32

src/core/raster/qgsrasterlayer.cpp

@@ -3658,6 +3658,8 @@ QString QgsRasterLayer::buildPyramids(RasterPyramidList const & theRasterPyramid
   //
   // Note: Make sure the raster is not opened in write mode
   // in order to force overviews to be written to a separate file.
+  // Otherwise reoopen it in read/write mode to stick overviews 
+  // into the same file (if supported)
   //
 
 

src/core/symbology/qgssymbol.cpp

@@ -40,7 +40,7 @@ QgsSymbol::QgsSymbol(QGis::VectorType t, QString lvalue, QString uvalue, QString
       mLabel(label),
       mType(t),
       mPointSymbolName( "hard:circle" ),
-      mPointSize( 3 ),
+      mPointSize( DEFAULT_POINT_SIZE ),
       mPointSymbolImage(1,1, QImage::Format_ARGB32_Premultiplied),
       mWidthScale(1.0),
       mCacheUpToDate( false ),
@@ -58,7 +58,7 @@ QgsSymbol::QgsSymbol(QGis::VectorType t, QString lvalue, QString uvalue, QString
       mPen( c ),
       mBrush( c ),
       mPointSymbolName( "hard:circle" ),
-      mPointSize( 3 ),
+      mPointSize( DEFAULT_POINT_SIZE ),
       mPointSymbolImage(1,1, QImage::Format_ARGB32_Premultiplied),
       mWidthScale(1.0),
       mCacheUpToDate( false ),
@@ -69,7 +69,7 @@ QgsSymbol::QgsSymbol(QGis::VectorType t, QString lvalue, QString uvalue, QString
 
 QgsSymbol::QgsSymbol()
     : mPointSymbolName( "hard:circle" ),
-      mPointSize( 3 ),
+      mPointSize( DEFAULT_POINT_SIZE ),
       mPointSymbolImage(1,1, QImage::Format_ARGB32_Premultiplied),
       mWidthScale(1.0),
       mCacheUpToDate( false ),
@@ -83,7 +83,7 @@ QgsSymbol::QgsSymbol(QColor c)
     : mPen( c ),
       mBrush( c ),
       mPointSymbolName( "hard:circle" ),
-      mPointSize( 3 ),
+      mPointSize( DEFAULT_POINT_SIZE ),
       mPointSymbolImage(1,1, QImage::Format_ARGB32_Premultiplied),
       mWidthScale(1.0),
       mCacheUpToDate( false ),
@@ -227,17 +227,17 @@ QString QgsSymbol::pointSymbolName() const
     return mPointSymbolName;
 }
 
-void QgsSymbol::setPointSize(int s)
+void QgsSymbol::setPointSize(double s)
 {
-    if ( s < 3 )  
-	mPointSize = 3;
-    else 
-    	mPointSize = s;
+  if ( s < MINIMUM_POINT_SIZE )  
+    mPointSize = MINIMUM_POINT_SIZE;
+  else 
+    mPointSize = s;
 
-    mCacheUpToDate = mCacheUpToDate2 = false;
+  mCacheUpToDate = mCacheUpToDate2 = false;
 }
 
-int QgsSymbol::pointSize() const
+double QgsSymbol::pointSize() const
 {
     return mPointSize;
 }
@@ -343,12 +343,12 @@ QImage QgsSymbol::getPointSymbolAsImage(  double widthScale, bool selected, QCol
   {
     pen.setColor ( selectionColor ); 
     QBrush brush = mBrush;
-    preRotateImage = QgsMarkerCatalogue::instance()->imageMarker ( mPointSymbolName, (int)(mPointSize * scale * widthScale * rasterScaleFactor),
+    preRotateImage = QgsMarkerCatalogue::instance()->imageMarker ( mPointSymbolName, (float)(mPointSize * scale * widthScale * rasterScaleFactor),
                                                                    pen, mBrush );
   }
   else 
   {
-    preRotateImage = QgsMarkerCatalogue::instance()->imageMarker ( mPointSymbolName, (int)(mPointSize * scale * widthScale * rasterScaleFactor),
+    preRotateImage = QgsMarkerCatalogue::instance()->imageMarker ( mPointSymbolName, (float)(mPointSize * scale * widthScale * rasterScaleFactor),
                                                                    pen, mBrush );
   }
 
@@ -517,7 +517,7 @@ bool QgsSymbol::readXML( QDomNode & synode )
     if ( !  psizenode.isNull() )
     {
         QDomElement psizeelement = psizenode.toElement();
-        setPointSize( psizeelement.text().toInt() );
+        setPointSize( psizeelement.text().toFloat() );
     }
 
     mRotationClassificationField = -1;

src/core/symbology/qgssymbol.h

@@ -83,9 +83,9 @@ class CORE_EXPORT QgsSymbol{
     /**Get point symbol*/
     virtual QString pointSymbolName() const;
     /**Set size*/
-    virtual void setPointSize(int s);
+    virtual void setPointSize(double s);
     /**Get size*/
-    virtual int pointSize() const;
+    virtual double pointSize() const;
     //! Destructor
     virtual ~QgsSymbol();
 
@@ -145,7 +145,7 @@ class CORE_EXPORT QgsSymbol{
     /* Point symbol name */
     QString mPointSymbolName;
     /* Point size */
-    int mPointSize; 
+    double mPointSize; 
 
     /* TODO Because for printing we always need a symbol without oversampling but with line width scale, 
      *      we keep also separate picture with line width scale */