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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

373 questions
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QwtPlot - Heap corruption detection

I've got geap corruption detection in my code. An Error occure after destruction. The error is connected with QwtLegend and QwtPlotCurve pointers. I tried to use auto_ptr to have 100% certainty that memery is deallocated correctly, but even thought…
Nowax
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C++ compiling error including X11/X.h X11/Xlib.h

I am currently porting a c++ application developed in MS VS2005 to linux and unfortunately this is the first time I am doing this. We are using Qt 4.6, Opencascade 6.5.1 and Qwt 6.0.1. Most of the code compiles just fine but at one point we are…
Bowdzone
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Running QWT example program(.pro) with Visual Studio 2010 error

I face the following error when trying to run a qwt example, the oscilloscope example to be exact in Visual Studio QT add in. There will be build errors, and the following lines will be shown: 1>------ Build started: Project: oscilloscope,…
rockinfresh
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zooming with ctrl + mouse wheel

My problem is very interesting to me. I am working on Qwt and I would like to enable zoom respect X and Y axis separately. I achived zoom only X axis but Y axis didn't work. I couldn't get it. I will be glad if you give an advise. Here is my…
alperyazir
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Can't get qwt_designer_plugin to load in Qt Creator

My setup is: Visual Studio 2012 Qt 5.2.0 from http://download.qt-project.org/official_releases/qt/5.2/5.2.0/qt-windows-opensource-5.2.0-msvc2012-x86_64-offline.exe Unzip Qwt from…
parsley72
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QPainterPath QTransform::map

I would like to draw a rectangle with an angle. It works but when I change the angle, location of rectangle is changing somewhere else. I couldnt understand it. Does anybody give me a hand? Here is my code : QPoint point = QPoint(100,100); // has to…
alperyazir
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PySide with PyQwt

I have a app that using PyQt/PyQwt, now I want to transform the PyQt to PySide but I don't know if PyQwt can work with PySide, it seems PyQwt is binded with PyQt. So is there a way that allow me to use PyQwt under the framework by PySide？
luxiaolu
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Qt designer plugin does not load in Eclipse CDT

I have installed the Qwt widgets and they run fine in Qt Creator and QT 4 Designer; however when I run the QT Designer via Eclipse CDT they don't show up. Any ideas what is wrong? I am on x32 Ubuntu 9.04 (Jaunty Jackalope) and running Eclipse CDT…
bahree
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Change axis ticks and label to switch between millimeter and inch in QWT Plot

What I want is to switch axis labels and ticks to match as best for displaying inch and millimeters without changing curve points. I created a custom QwtScaleDraw and overwrote label() method, but this will not change the ticks. class QwtMyScaleDraw…
bkausbk
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How can I plot a discrete dataset using Qwt/Qt?

The stem command in MATLAB plots a discrete data sequence. Is there any equivalent class/method in Qwt to achieve a similar output?
zml
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Compiling Qwt with Microsoft VS2010

How do I compile Qwt with Microsoft Visual Studio? NO information is available on the internet and even worse, documentation of Qwt is really limited.
user2187476
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How to build Qwt on Windows

Here's what I've done: Downloaded qwt-4.2.0-setup-qt230nc.exe from sourceforge Unpack to C:\Program Files\Qwt Go to Qt Command Prompt Run msvc-qmake.bat. Get the output. Now the lib directory is created, but it's empty. Also tried opening VS…
Yelonek
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Plot only part of QwtCurve in real time plot

I have a QVector in which I'm constantly appending data so I can plot on a QwtPlot. But with a high frequency I guess the vector becames too large and the program crashes. My question is, how can I create a QwtCurve which is only beggining in some…
SamuelNLP
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How to set fixed axis intervals with Qt/QwtPlot?

I want to have a plotting widget in my Qt application. Qwt provides such a widget with QwtPlot. However, I can't find any way to only display a certain part of the complete range of my data. Specifically, I want to display spectrums with a frequency…
bastibe
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How do I limit the maximum range that a QwtPlot can be zoomed out to?

I have a QwtPlot with a QwtPlotZoomer that sets its zoom base to some arbitrary size. How can I then prevent the user from zooming out beyond that window?
Travis Christian
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