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Forum: Qwt

Questions related to Qwt - Qt widgets for technical applications.

  1. QwtPlotDirectPainter usage with QwtZoomer and QwtPanner

    Hi All, Can anybody tell me if it is possible QwtPlotDirectPainter in zoomer and panner supported QwtPlot application. I mean could I implement...

    Posted By umituzun84
    • Replies: 0
    • Views: 10
    Today 11:29 Go to last post
  2. QwtPolar or QwtPlot examples do not start

    On Windows Vista, Qt.4.50, I can compile the libraries and also the examples. But when I try to run any of the executable examples (e.g....

    Posted By giusepped
    • Replies: 2
    • Views: 16
    Today 06:09 Go to last post
  3. How to get the same curve plotted in multiple QwtPlot?

    In the doc: ( http://qwt.sourceforge.net/class_qwt_plot_item.html#eb2f676533ccae3436bf578824e2165e ) But what if one want multiple Plot plot...

    Posted By grissiom
    • Replies: 1
    • Views: 28
    13th March 2010 09:55 Go to last post
  4. QwtPlot line thickness

    I've to print two curve one with a pen with size 1 and another with size 4. The preview it's good, but when printing the thickness of the two...

    Posted By maluedo
    • Replies: 4
    • Views: 74
    12th March 2010 17:13 Go to last post
  5. Problem running QwtPolar examples

    I'm using: Qt 4.5.3 Qwt 5.2.1 QwtPolar 0.1.0 All built in debug mode. Running on Windows XP. I have successfully compiled QwtPolar and the...

    Posted By MSUdom5
    • Replies: 4
    • Views: 72
    11th March 2010 19:26 Go to last post
  6. Can not build qwt example prog from home folder.

    Hi all, I am using Qt-4.5.3 on Ubuntu 8.0.4. I have downloaded and compiled qwt-5.2.0 successfully. The examples works fine. I managed to compile...

    Posted By gQt
    • Replies: 2
    • Views: 51
    11th March 2010 10:46 Go to last post
  7. Editing points on QWt Plot

    Hi every one, how to edit the points on the qwt plot and acquire the points into a table or array and then replot it. To show...

    Posted By manmohan
    • Replies: 3
    • Views: 84
    11th March 2010 09:51 Go to last post
  8. plot with hor. lines and text

    Hi, I have to plot system uptimes. Dates on the y axis, tod on the x axis. Each horizontal line must have the system id. I am just beginning...

    Posted By hugo vanwoerkom
    • Replies: 2
    • Views: 53
    10th March 2010 18:00 Go to last post
  9. Problem with Zoomer

    Hello, I ran into a problem with the zoom function applied like in spectrogram example. As soon as I click the right mouse button to zoom back...

    Posted By rambo83
    • Replies: 1
    • Views: 30
    10th March 2010 13:35 Go to last post
  10. how to make min and max values of spectrogram dynamical?

    Hello, I wonder whether it is possible to get the actual min and max range values of spectrogram and not to set them manually, like I do it now...

    Posted By rambo83
    • Replies: 6
    • Views: 95
    10th March 2010 11:02 Go to last post
  11. QwtRasterData and values

    Can someone explain to me why the QwtRasterData::value method (which returns the value at the specified raster position) has "doubles" as the x / y...

    Posted By DKL1972
    qwtrasterdata, raster, spectrogram
    • Replies: 12
    • Views: 694
    10th March 2010 10:53 Go to last post
  12. Question Problem building Qwt 5.2.0 with MinGW

    I downloaded Qwt 5.2.0 from source forge, and unzipped it to a folder. I editted the qwtconfig.pri file to point to this folder and tweaked the...

    Posted By spatten
    • Replies: 3
    • Views: 57
    9th March 2010 15:39 Go to last post
  13. Complicated QwtPlotZoomer crash, possible bug? Help request.

    Hi guys, I have a really annoying bug in my program that is hard to track down. The situation is that when I repeatedly zoom in/out/in/out many...

    Posted By philwinder
    2 Pages
    1 2
    • Replies: 28
    • Views: 2,276
    9th March 2010 09:59 Go to last post
  14. Histogram

    Hi. I tried to put a legend in Hisotrgr. Although the legend is displayed, there are no symbols attached to the text in the legend. Why? ...

    Posted By giusepped
    • Replies: 1
    • Views: 47
    9th March 2010 09:54 Go to last post
  15. QwtPlotSpectrogram and contour lines

    Hi, I am plotting some values with a QwtPlotSpectrogram: QPixmap plotImage = QPixmap(plotSize); plotImage.fill(QColor(Qt::white)); QPainter...

    Posted By toffkriss
    • Replies: 3
    • Views: 63
    8th March 2010 11:49 Go to last post
  16. Question How to build Qwt 5.2.0

    I am struggling to get Qwt 5.2.0 to build successfully for use in VS 2003 on Windows XP. I have tried following the instructions in the Install file...

    Posted By spatten
    • Replies: 0
    • Views: 34
    8th March 2010 10:36 Go to last post
  17. Strange Interpolation in Qwt3dPlots Surface Plots

    Hi, I'm trying to plot a simple surface plot in 3D. I don't understand the interpolation, because: For these data, being (x, y, z) the colums...

    Posted By locke
    • Replies: 0
    • Views: 57
    7th March 2010 14:13 Go to last post
  18. how to use Qwt in Qt creator(1.2.1)?

    hi, i am very new to this qwt and qt. i have qt project in which few graphs are to be drawn. my issues are: 1)i am using RHEL 5 server where...

    Posted By qtlinuxnewbie
    • Replies: 2
    • Views: 85
    6th March 2010 14:29 Go to last post
  19. Building Qwt 5.2.0 on Windows

    Hi all, I have downloaded Qwt 5.2.0 and want to build it using Visual Studio 2008 on Windows Vista x64 running the Intel Compiler. However when...

    Posted By woogoo
    build, intel, moc, qwt, windows
    • Replies: 2
    • Views: 147
    6th March 2010 14:21 Go to last post
  20. Clear a cache!

    Hello! I have a QwtPlotSpectrogramm item on my QwtPlot widget. I found out that it caches when I do it visible or invisible. Then some parameters...

    Posted By Indalo
    • Replies: 1
    • Views: 52
    5th March 2010 17:59 Go to last post
  21. Post Multiple Plots (QwtSpectrogram) in a QTabWidget

    Hi friends, I have multiple QwtPlots'(QwtSpectrograms) in a QTabWidget, each plot is displayed in a tab separately. I am observing one weird...

    Posted By uppu
    qtabwidget, qwtplot, qwtspectrogram.
    • Replies: 1
    • Views: 64
    4th March 2010 18:57 Go to last post
  22. qHash(double) problem with Qt 4.6 (tp1)

    Hi, I am trying to build QWT 5.2 against Qt 4.6 (tp1) with mingw. The compiler complains about ambiguous overloaded qHash, first instatiated in...

    Posted By sascha
    2 Pages
    1 2
    • Replies: 21
    • Views: 1,308
    3rd March 2010 18:23 Go to last post
  23. QwtPlotMarker are not displayed on the QwtPlot

    Hello, I try to display markers above a spectrogram. The spectrogram data is visualized correctly, but I cannot see any markers on it. The code I...

    Posted By rambo83
    • Replies: 2
    • Views: 72
    3rd March 2010 16:46 Go to last post
  24. Question Implimentation advice for a large data plotting application.

    Hi I am writing a GUI application that will talk to either an A to D or D to A hardware card (Analogue to Digital, ...). I chose Qt and Qwt as they...

    Posted By mike_the_tv
    data capture
    • Replies: 7
    • Views: 169
    3rd March 2010 09:41 Go to last post
  25. Plot a graph without Qwt

    Hi I want to plot a graph (2D) without using Qwt, i.e. simply using Qt with Qt Creator. How to do that? Any idea? thanks in advance...

    Posted By abghosh
    plot a graph without qwt
    • Replies: 1
    • Views: 97
    2nd March 2010 14:17 Go to last post
  26. how can ı run qwt project and examples on qt creator on ubuntu 9.10?

    hi , I must use qwt to draw graphic , but haven't run yet. I have an error like this-->error while loading shared libraries: libqwt.so.5:...

    Posted By skarahan
    • Replies: 1
    • Views: 64
    28th February 2010 07:31 Go to last post
  27. Printing custom report with QWT

    Dear mates, I'm pretty newbie, so be patient ... please :-) There's a way to print a custom report with text and images and with a plot created...

    Posted By maluedo
    • Replies: 1
    • Views: 73
    27th February 2010 14:44 Go to last post
  28. QwtPlot image file without QApplication

    We have a server with no user interface and minimal graphics support that we would like to use qwtPlot to general plots from streams of data without...

    Posted By qwtsj
    • Replies: 1
    • Views: 61
    26th February 2010 11:22 Go to last post
  29. Question Can execute examples

    Hi Ive compiled and installed qwt...I have compiled all examples... But when I want to run any of the examples I got this error statement: error...

    Posted By gyre
    • Replies: 12
    • Views: 933
    26th February 2010 09:51 Go to last post
  30. how to plot scatter graph?

    Hello, I would like to plot some kind of scatter graph on my QwtPlot to indicate feasible and infeasible regions on a spectrogramm, which is...

    Posted By rambo83
    constraint, inequality, scatter plot
    • Replies: 0
    • Views: 63
    25th February 2010 13:24 Go to last post

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