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doc/changes.dox

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+/*!
+\page qwtchangelog What's new in Qwt 6.2
+
+\tableofcontents
+
+\section PLATFORM Qt >= 4.8
+
+Support for Qt < Qt 4.8 has been dropped, support for Qt6 has been added.
+
+\section Class Includes
+
+Include files, that match the class names are available now. So
+it is possible to write "#include <QwtPlot>" now instead of "include qwt_plot.h"
+
+\section POLAR QwtPolar has become part of Qwt
+
+The QwtPolar project ( https://qwtpolar.sourceforge.io ) has been integrated
+into Qwt. 
+
+\section MATHML MathML Text Renderer has become its own project
+
+The code can be found at https://github.com/uwerat/qwt-mml-dev now and is intended
+to become a standalone lib.
+
+\section SPLINES Spline
+
+The broken implementation of QwtSpline has been replaced by a bunch of classes
+offering all sort of functionalities around splines.
+
+The most popular spline approximation/interpolation algos have been implemented:
+
+    - Basis
+    - Cardinal
+    - ParabolicBlending
+    - Akima
+    - The one used in a proprietory office package
+    - Cubic
+
+\section OPENGL Better OpenGL support
+
+QwtPlotOpenGLCanvas added to support rendering to a QOpenGLWidget
+
+\section ITEMS New plot items
+
+    - QwtPlotVectorField
+      A new type of plot item for vector fields
+
+    - QwtPlotGraphicItem
+      An item displaying a QwtGraphic image ( f.e used by QwtPlotSvgItem )
+
+\section CURVE QwtPlotCurve
+
+	- QwtPlotCurve::FilterPointsAggressive
+      A fast weeding algo for huge datasets with increasing x or y values
+
+	- QwtPlotCurve::closestPoint
+	  Is virtual now
+
+	- Line Clipping
+	  Includes the painter clip now
+
+	- QwtValuePointData
+	  A new type of data added, where the x values are the index
+
+	- QwtPlotCurve::setSamples
+	  more type of setters
+
+\section SPECTROGRAM QwtPlotSpectrogram
+
+	- QwtPlotSpectrogram::setColorTableSize
+      Using individual RGB tables
+
+	- QwtRasterData::setInterval/interval
+	  API cleanup
+
+	- QwtHueColorMap, QwtSaturationValueColorMap
+	  New type of color maps
+
+	- QwtMatrixRasterData::BicubicInterpolation
+	  Implementation of bicubic interpolation added
+
+	- Handling of NaN values
+      NaN values are interpreted as gaps, when QwtRasterData::WithoutGaps
+      is not set
+
+\section OTHERS Other changes
+
+    - QwtPlotRenderer
+      Using QPdfWriter instead of QPrinter, where possible
+
+	- Handling of Unknown Paint Engines
+      Not aligning unknown paint engines ( f.e EMF ), QwtNullPaintDevice is not using
+      QPaintEngine::User anymore
+
+	- QwtTransform::LogMin/LogMax
+	  LOG_MIN/LOG_MAX have been reomed ( values differ ! 
+
+	- qwt_compat.h
+	  Removed
+
+	- qwtFuzzyGreaterOrEqual/qwtFuzzyLessOrEqual
+	  Removed
+
+	- qwtGetMin/qwtGetMax
+	  Removed
+ */