119 lines
2.6 KiB
Groff
119 lines
2.6 KiB
Groff
.TH "qwtchangelog" 3 "Sun Jul 18 2021" "Version 6.2.0" "Qwt User's Guide" \" -*- nroff -*-
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.ad l
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.nh
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.SH NAME
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qwtchangelog \- What's new in Qwt 6\&.2
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.SH "Qt >= 4\&.8"
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.PP
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Support for Qt < Qt 4\&.8 has been dropped, support for Qt6 has been added\&.
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.SH "Includes"
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.PP
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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'
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.SH "QwtPolar has become part of Qwt"
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.PP
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The QwtPolar project ( https://qwtpolar.sourceforge.io ) has been integrated into Qwt\&.
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.SH "MathML Text Renderer has become its own project"
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.PP
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The code can be found at https://github.com/uwerat/qwt-mml-dev now and is intended to become a standalone lib\&.
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.SH "Spline"
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.PP
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The broken implementation of \fBQwtSpline\fP has been replaced by a bunch of classes offering all sort of functionalities around splines\&.
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.PP
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The most popular spline approximation/interpolation algos have been implemented:
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.PP
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.nf
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- Basis
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- Cardinal
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- ParabolicBlending
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- Akima
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- The one used in a proprietory office package
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- Cubic
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.fi
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.PP
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.SH "Better OpenGL support"
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.PP
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\fBQwtPlotOpenGLCanvas\fP added to support rendering to a QOpenGLWidget
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.SH "New plot items"
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.PP
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.PP
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.nf
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- QwtPlotVectorField
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A new type of plot item for vector fields
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- QwtPlotGraphicItem
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An item displaying a QwtGraphic image ( f.e used by QwtPlotSvgItem )
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.fi
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.PP
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.SH "QwtPlotCurve"
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.PP
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.PP
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.nf
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- QwtPlotCurve::FilterPointsAggressive
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A fast weeding algo for huge datasets with increasing x or y values
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- QwtPlotCurve::closestPoint
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Is virtual now
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- Line Clipping
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Includes the painter clip now
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- QwtValuePointData
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A new type of data added, where the x values are the index
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- QwtPlotCurve::setSamples
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more type of setters
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.fi
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.PP
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.SH "QwtPlotSpectrogram"
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.PP
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.PP
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.nf
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- QwtPlotSpectrogram::setColorTableSize
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Using individual RGB tables
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- QwtRasterData::setInterval/interval
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API cleanup
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- QwtHueColorMap, QwtSaturationValueColorMap
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New type of color maps
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- QwtMatrixRasterData::BicubicInterpolation
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Implementation of bicubic interpolation added
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- Handling of NaN values
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NaN values are interpreted as gaps, when QwtRasterData::WithoutGaps
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is not set
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.fi
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.PP
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.SH "Other changes"
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.PP
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.PP
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.nf
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- QwtPlotRenderer
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Using QPdfWriter instead of QPrinter, where possible
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- Handling of Unknown Paint Engines
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Not aligning unknown paint engines ( f.e EMF ), QwtNullPaintDevice is not using
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QPaintEngine::User anymore
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- QwtTransform::LogMin/LogMax
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LOG_MIN/LOG_MAX have been reomed ( values differ !
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- qwt_compat.h
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Removed
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- qwtFuzzyGreaterOrEqual/qwtFuzzyLessOrEqual
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Removed
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- qwtGetMin/qwtGetMax
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Removed
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.fi
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.PP
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