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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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Methods that allow me to change a QwtPlot color background

I would like to know what methods I can use to change my QwtPlot after it has been created and also how to use. By now I'm using QwtPlot->setCanvasBackground() in my constructor, however in my program the user have the option to change the…
Vitor Santos
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How to plot graph in Qt using the data received from serial port?

I have successfully communicated with one of my ARM7 board through serial port in Qt using qextserialport. Now I have the data with me. I want to use it to plot graph (realtime plot), so, can anybody tell me how to do it? If possible please, provide…
Amar
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Qwt and boost::signals

My project is using both Qt (included Qwt) and Boost::signals. As known, their macros are incompatible with each other. I compiled my project with CONFIG += no_keywords and renamed all Qt macros with upper-case registry i.e. signals = Q_SIGNALS.…
SandyEmerald
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Convert std::string to QwtText

Is there a way to do this? I am trying to create a label to correspond to a marker I have created using QwtPlotMarker. My aim is to display a label containing the coordinates of my click, m_xPos and m_yPos, in the following example containing the…
programmingNoob
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PyQwt 5.x w/ PyQt 4.6 on Windows

Looking for Qt 4.6 features but it seems PyQwt 5.x is bundled only with PyQt. Compiling from source looks a bit daunting, any ideas on how I might get PyQwt to operate with Qt 4.6+?
stgtscc
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getting the value from a qwtslider

I have a qwtslider and I want to get the value to apply on a vtkImagePlaneWidget, but i can't figure out how to do this. I've been using getValue() but it won't work. I have the function to transfer it: void planevolume::SplaneX() { double…
SamuelNLP
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Connect a combox with a slider

I'm trying to connect a qcombobox with a qwtslider, and I have two options on the combox, mm and pixel. I want to make the scale change to pixels or mms when I choose that option. I've created some functions to work as slots and those are: void…
SamuelNLP
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Qwtslider layout - show current value

i have a slider and apart from the scale that i was able to make it to be shown i want a label that shows me what's the current value of the slider, and when i slide it, it will change to the current position. Something like in this link from…
SamuelNLP
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Qt Creator doesn' t support Qwt Mingw plugin?

when i build qwt, and want to make it into Qt Desiner of Qt creater,, but occur a error: Expected build key "Windows msvc release full-config", got "Windows mingw debug full-config",, this is the pic for it. what happened?
Mr.Tu
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definition of qwtplot

it's my first post, hope to not break something :). On windows there are two versions of python2.7, 32 bit and 64 bit both with pyqt and qwt5 i'm trying pyqt from some week, today i tried to use my python/pyqt/pyqwt code written on linux, on…
bomba
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qwt save plot configuration?

The user has spent a lot of time setting up a nice qwt plot (picking curves from the database, configuring line colour and style, scaling them, scrolling and panning to the interesting places, and so on). Now he wants to save this layout, not as a…
Batox
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QwtPlot: making last plotted point look in a different color or size

I have a system which is drawing points into a QwtPlot. What I want is getting the last plotted point at any time plotted in a different color, so I can always know which has been the last plotted point by the moment. Is there any direct way of…
Roman Rdgz
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qt qwt QList of QwtPlotCurves

I would like to make a QList of QwtPlotCurve s. The reason for this is to be able to remove them later form my QwtPlot. I have the following code: QList myList = new QList; QwtPlotCurve* curve1 = new…
user1326050
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Qt - plot results dynamically in time

I've programmed a simulation, which solves a few equations and draws the result in an OpenGL window. The simulation evolves with time continuously. I would like to add points dynamically. I'm using some code like the following: QwtPlot* plot =…
The Quantum Physicist
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QWT installation error - nmake fails

For displaying charts in my C++ project, I want to use QWT with Qt. I have downloaded QWT of the last version from sourceforge, and I have downloaded Qt libraries 4.8.1 for MSVC2008 (my compiler) from the official web page. Now I want to install…
Pavlo Dyban
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