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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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failed to load platform plugin "windows" Available platforms are: windows, minimal

Hi Im trying to execute my .exe file from the debug folder. Now before you go telling me about all the other related articles Ive looked at them all and their solutions are not helping with my problem. Ok first off Im using Qwt library and trying…
codingNightmares
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event providing to QWidget(QWT) embedded into QML Qt4

I've used QwtPlot (Qwt 6.0.1) in QML project (Qt 4.8) . i'm wrap it via QDeclarativeItem GraphWidgetQML::GraphWidgetQML(QDeclarativeItem *parent):QDeclarativeItem(parent) { _GraphArea = new GraphWidget; //child of QwtPlot without event handlers…
llCorvinuSll
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How boundingRect() works

I have some code where I draw a symbol and attach it to a plot. Now I want to find out whether there is a bounding rectangle automatically created with the symbol so that I can write some code to select the symbol so that users can edit it - select…
programmingNoob
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How to draw an Qwt plot into an image

I'd like to overlay a graph over a video stream, i.e. a QImage within a custom widget. How would I go about drawing the Qwt plot to a surface other than a Qwt Plot? What would be the Qt way to do this? Subclass Qwt Plot? Define a custom canvas with…
Herr von Wurst
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QWT: Replot without removing the previous points

I am using QWT 6 and I am trying to plot some dots every second. To do that I use the following code: d_plot_dots->setRawSamples(_realDataPoints, _imagDataPoints, size); plot->replot(); I want to support a hold on option, so dots from previous…
Manos
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What does explicitly shared mean?

In this page: http://qwt.sourceforge.net/class_qwt_plot_curve.html#afd13c94e23520dacbc37b4d0fd036a8b The method void QwtPlotCurve::setRawSamples() just saves the addresses of the data in the QwtPlotCurve, which is exactly what I want for…
The Quantum Physicist
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Install qwt library on OS X Lion

I've downloaded qwt-6.0.1 and then tried to install qwt . First i try to generate MakeFile : qmake -spec macx-g++ this is ok. When i try to compile sources with make i get after a while /bin/sh: /Developer/Tools/Qt/moc: No such file or…
user704010
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Integrating QWT 6.0.1 with Qt Creator/Designer 4.8.0

I've installed the Qt SDK version 4.8.0 (to C:\QtSDK) on a Windows 7 64-bit machine. I've also installed and successfully compiled QWT 6.0.1 with MSVC2010. I can use QWT in C++ code by linking to the libraries; however when I try to use the plugin I…
KittenWhiskers
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Visual Studio header not found (Qwt)

I would appreciate some help with the following: I'm writing a program in Visual Studio 2010 using the Qt addon, and I needed to plot some data. Consequently, I installed Qwt. The Qwt widgets are avaliable in Qt Designer (so I've done something…
Jean-Luc
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Is it possible to draw violin plots in Qt/Qwt?

I am trying to implement violin plots using Qt. I have checked the internet for resources about the matter but so far I have only found examples that have been implemented using R and Python. Does Qt -or maybe Qwt for that matter- possess the…
bremmS
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Qwt and QwtSeriesData

I originally use C Programming language. But Now, I need to use Qt programming (by the way, Qt is like a dream). I am going to more depth step by step. But my C++ object oriented knowledge is weak, I hope that it will be stronger. Nowadays I have to…
adba
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QwtPlotSpectrogram: using a logarithmic color scale?

I'm using a QwtPlotSpectrogram with a custom QwtRasterData to plot 2D data with widely varying values. I would like to plot using a logarithmic color scale instead of a linear one. Is there a simple way to do this? My alternative is to feed…
Janik Zikovsky
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Unresolved external symbol while trying to make custom widget from Qwt Plot in Visual Studio?

Im trying to make custom widget in Qt with Qwt extension via Add >> New Item >> Qt Class. My enviroment : Visual studio 2022 Qt 5.12.2 Qwt 6.2.0 Qt Creator 6.4.0 I successfully executed custom widget with QLabel base class but I can't successfully…
Miro Bozon
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run Qt - QWT on Ubuntu

Build and installation qmake qwt.pro make sudo make install Configure 2.1. add the following lines to .bashrc: export QWT_ROOT="/usr/local/qwt-6.2.0" QT_PLUGIN_PATH="${QWT_ROOT}/plugins:$QT_PLUGIN_PATH" export…
Kto To
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qwt examples fail to build with linker error on Windows with MSVC (LNK2019)

I have QT 6.2.2 installed on Windows 10 and am trying to build qwt 6.2.0. Compilation via MSVC of the qwt library is successful but nmake outputs linker errors when compiling the qwt examples. I am attempting to compile all of qwt via the QT MSVC…
funwound
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