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Questions tagged [qwt]

a collection of QT widgets, GUI components and utility classes.

Qwt or Qt Widgets for Technical Applications is a library of custom widgets, GUI components and utility classes which are written in C++ language and primarily useful for programs with a technical background. The library provides a 2D plot widget in addition to scales, sliders, dials, compasses, thermometers, wheels and knobs to control or display values, arrays, or ranges.

This library is intended mainly for usage in scientific or technical applications. It works well with large number of points.

The Qwt user's guide may be found at https://qwt.sourceforge.io/.

Qwt is distributed under the terms of Qwt license which is basically is LGPL and may be found here: https://qwt.sourceforge.io/qwtlicense.html

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LNK2001: Unresolved external symbol when using qwt plot in Qt creator

I am subclassing QwtPlot. I have the following error: moc_myplot.obj:-1: error: LNK2001: unresolved external symbol "public: static struct QMetaObject const QwtPlot::staticMetaObject" (?staticMetaObject@QwtPlot@@2UQMetaObject@@B) I have tried to the…
lnk
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is it possible to change the location of axis's in qwt?

In Qwt is it possible to change the location of both axis' from bottom left (default position) to the middle of the QwtPlot? (intersection of both axis should be at the center of the plot). I yet to to find a piece of code that does that. myPlot =…
Samer
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Install and use QWT under Mac OS X

I am currently trying to get QWT 6.1.0 running under MAC OS X 10.7.5. I followed the instructions over here --> http://qwt.sourceforge.net/qwtinstall.html I didn't changed something inside the configuration files. So everything worked fine, but now…
Sebastian Boldt
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Qwt plot auto scale not working

I'm trying to plot some data using qt 4.8 and qwt 6, but my curves doesn't scales over plot (1). This is how I attach curves to plot: curves[moduleIndex][channelIndex]->setSamples(samples,…
Stepan Kuzmin
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Can't link qwt in Qt

I use LIBS flag to link qwt library to my project. So in .pro of my project i have LIBS += -L/home/Desktop/qwt-6.0.1/lib -lqwt But anyway Qt does not recognize qwt classes. What i'm missing ??
user704010
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Qwt append point to plot

I'm writing my first program using Qwt. I've created a QwtCurve object and I used QwtCurve::setData to add my points. Then I attached the plot to my curve and replotted the graph to see the curve. I have to add a point every 500ms, is there a way…
Jean-Luc
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Porting Qwt library to playbook

I am new to Qt, cross compiling and porting so please bear with me. My goal is to use the Qwt library on Playbook OS for a Qt based application. I found a nice tutorial on Qt for Blackberry Playbook and I managed to get a simple Qt "Hello World"…
unexplored
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how to Draw A surface between 2 sinus cuves

i would love to draw the surface between à two sinus curves. the two sinus curves have the same base of time it mean the x of first point of my two sinus are the same also the second point.... so how can i do that? my idea is to draw a bunchs of…
Omar Messari
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QwtPlotSpectrogram with log scales

I want to put logarithmic a scale next to spectrogram. I want the displayed image to be the same as for the linear data. The code for the version with linear scales looks like this: #include #include #include…
Thomas
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error in running qwt program

hi every one i have installed qwt and include the path INCLUDEPATH += /usr/local/qwt-6.0.0-rc5/include LIBS += -L/usr/local/qwt-6.0.0-rc5/lib -lqwt in my pro file but when i run my program i get the error error while loading shared libraries:…
tariq
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How to get Y coordinate of plot curve depending on its X coordinate (QWT)?

There's a code based on QML and QWT, kind of a graph maker with additional possibilities. One of the technical requirements is to get Y coordinate of a plot curve depending on some X coordinate. There's an inaccurate way to do it - get the QPoint…
Nikita
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how to use Qwt in the Qt 4.7

I have downloaded the QWT & want to use that for creation of graphs & charts. I am using Qt 4.7 for creating application. How to use Qwt in my application. How do I add the header file & library to my application?
amrit_neo
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Application Qt and Qwt won't run from menu

Greetings for the first time: Usually I can work my way through problems like this but I think I need help for this one. I have developed a small utility for myself to plot some data using Qt and Qwt under Mint. When I run the application from Qt…
B Kace
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Unresolved external symbol: QMetaObject const QwtPlotMagnifier::staticMetaObject

I have a library that uses QwtPlotMagnifier, amongst other Qwt classes. I decided to subclass QwtPlotMagnifier so that I can emit a signal when the plot is rescaled. The library (mylib.lib) compiles, but the application using it is now complaining…
mike
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Errors while building with QWT

I get an error undefined reference to `QwtPlot::QwtPlot(QWidget*)' when I try to build my project even though everything seems fine in the setup. In my CmakeLists.txt I have include_directories( [...] ${QWT_INCLUDE_DIR}) which points to where…
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