Help with Qwt and PyQt-Qwt, C++ symbols

["Gudjon I. Gudjonsson" <gudjon@gudjon.org>]

Hi list

 

I need to upgrade the Qwt package to version 6.1.3 and there are a few symbol

changes which I think are not dangerous.

 

I have been trying to make a python wrapper to the library:

https://github.com/GauiStori/PyQt-Qwt

So far it works ok for me even if it doesn't support all Qwt functionality but it

only builds if I add the attached patch.

Most of the patch is instantiations of virtual template functions. I think there should

be a way around it without patching Qwt but I haven't found any.

 

Is anyone willing and able to take a look? The patch works for both Qwt 6.1.2 and 6.1.3

and PyQt-Qwt compiles without problems in Debian. I need to know how big problem

the patch will make to the Qwt's C++ symbols.

 

Regards

Gudjon

 

 

#Patch to simplify python interface
--- a/src/qwt_series_data.h
+++ b/src/qwt_series_data.h
@@ -54,14 +54,14 @@
     virtual ~QwtSeriesData();
 
     //! \return Number of samples
-    virtual size_t size() const = 0;
+    virtual size_t size() const {return 0;};
 
     /*!
       Return a sample
       \param i Index
       \return Sample at position i
      */
-    virtual T sample( size_t i ) const = 0;
+    virtual T sample( size_t i ) const {return T();};
 
     /*!
        Calculate the bounding rect of all samples
@@ -75,7 +75,7 @@
 
        \return Bounding rectangle
      */
-    virtual QRectF boundingRect() const = 0;
+    virtual QRectF boundingRect() const {return d_boundingRect;};
 
     /*!
        Set a the "rect of interest"
--- a/src/qwt_series_store.h
+++ b/src/qwt_series_store.h
@@ -28,19 +28,19 @@
     virtual ~QwtAbstractSeriesStore() {}
 
     //! dataChanged() indicates, that the series has been changed.
-    virtual void dataChanged() = 0;
+    virtual void dataChanged() {};
 
     /*!
       Set a the "rectangle of interest" for the stored series
       \sa QwtSeriesData<T>::setRectOfInterest()
      */
-    virtual void setRectOfInterest( const QRectF & ) = 0;
+    virtual void setRectOfInterest( const QRectF & ) {};
 
     //! \return Bounding rectangle of the stored series
-    virtual QRectF dataRect() const = 0;
+    virtual QRectF dataRect() const {return  QRectF( 0.0, 0.0, -1.0, -1.0 );};
 
     //! \return Number of samples
-    virtual size_t dataSize() const = 0;
+    virtual size_t dataSize() const {return 0;};
 };
 
 /*!
--- a/src/qwt_picker_machine.h
+++ b/src/qwt_picker_machine.h
@@ -70,8 +70,8 @@
 
     SelectionType selectionType() const;
 
+    SelectionType d_selectionType;
 private:
-    const SelectionType d_selectionType;
     int d_state;
 };