Qwt Programmer's Manual
Qwt
The Qwt Widget Library - Qt Widgets for Technical Applications
The Qwt library contains GUI Components and utility classes which are primarily
useful for programs with a technical background.
Most of these widgets are used to control or display values, arrays,
or ranges of type double.
- QwtPlot
- A 2-D Plotting Widget used to display
x-y graphs of multiple data pairs. Supports different styles,
spline interpolation, four axes, automatic scaling, linear or
logarithmic scales, markers, crosshairs and more.
- QwtSliderBase
- A base class for sliders
- QwtSlider
- A slider with different layout styles.
- QwtKnob
- The QwtKnob widget resembles a volume knob of a radio.
- QwtWheel
- A wheel which can be used for fine-tuning over
large intervals.
- QwtCounter
- A widget for step-wise incrementation of a
numeric value.
- QwtThermo
- A thermometer gauge.
- QwtLegend
- A tabular arrangement of cells containing labels,
symbols, and lines.
- QwtPixFrame
- A frame which contains pixmap.
- QwtScale
- A widget which displays a scale.
- QwtArrowButton
- A Button with one or more arrows on it.
- QwtAutoScale
- A class which can be used to construct
linear or logarithmic scales such that several intervals
are included. Highly configurable.
- QwtCurve
- A class which draws curves in the x-y plane.
Many options and display styles.
- QwtMarker
- A class which draws markers into a coordinate system.
- QwtScaleDraw
- A scale drawer.
- QwtSpline
- A class for spline interpolation. Builds
natural and periodic cubical splines.
- QwtDiMap
- Transforms an interval of type double into
an interval of type int with linear
or logarithmic mapping.
- QwtDblRange
- A class which controls a range of type double
- QwtGrid
- A class which draws a coordinate grid.
- QwtColorFilter
- A class which manipulates colors.
- QwtSymbol
- A class which draws symbols.
- QwtScaleDiv
- A class which constructs a scale division.
- QwtMath
- A collection of mathematical routines.
- QwtScaleIf
- An interface class for widgets containing scale
Screenshots of some examples
Qwt Widget Library
Copyright (C) 1997 Josef Wilgen
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Qwt requires the Qt library, which is copyright of
Troll Tech AS.
Freely distributable programs can generally use Qt for free, see
README.QT for details.
Josef Wilgen (jwlg@mail.desy.de)
Qwt Widget Library 02/04/98