http://blog.gmane.org/gmane.comp.graphics.qwt.general hourly 1 1901-01-01T00:00+00:00 http://gmane.org/img/gmane-25t.png http://gmane.org http://comments.gmane.org/gmane.comp.graphics.qwt.general/1343 Hello all, I am plotting some data in a subclass of QwtPlotSpectrogram. The spectrogram is inside a QMainWindow along with some plotting controls below it. I want the aspect ratio of the Spectrogram to stay fixed even when the user resizes the MainWindow. Currently the aspect ratio starts out wrong (the spectrogram is wider than it is tall even though the y range of the data is larger than the x range of the data), and can be changed to whatever by resizing the mainwindow. How do I set the aspect ratio to be correct and keep it that way even though the user tries to resize the Mainwindow? Thanks in advance for any answers! Andreas ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ kamran iranpour 2008-05-15T11:09:14 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1336 Good morning. I noticed that my program, that uses qwt-5.0.2 core dumps in the QwtScaleDraw::alignment () method of the library. Is there any issue related to it, as far as you know, possibly solved in qwt 5.1? Thank you very much for your attention. Follows the backtrace of the program, from the core dump. Core was generated by `./blmprofile'. Program terminated with signal 11, Segmentation fault. #0 0xb7166d0a in QwtScaleDraw::alignment () from /usr/local/qwt/lib/libqwt.so.5 (gdb) bt #0 0xb7166d0a in QwtScaleDraw::alignment () from /usr/local/qwt/lib/libqwt.so.5 #1 0xb717fe17 in QwtPlot::setAxisScaleDraw () from /usr/local/qwt/lib/libqwt.so.5 #2 0x0805d6be in ProfilePlot::createCurves (this=0x80db2f0, elements=5, labels=< at >0xbf88471c) at src/profileplot.cpp:257 #3 0x080664b4 in GeneralProfile::configure (this=0xbf886040, area=< at >0xbf8847d0) at src/generalprofile.cpp:410 #4 0x08067304 in GeneralProfile::on_comboArea_activated (this=0xbf886040, text=< at >0xbf884d5c) at src/generalprofile.cpp:455 #5 0x0 Giacomo S. 2008-05-14T10:32:15 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1335 I have uploaded QwtPolar 0.0.2: its license has changed from the GPL to the Qwt license. Uwe ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ Uwe Rathmann 2008-05-14T04:37:16 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1331 For 7 plots, two of the plots have -1.38778e-17 instead of 0. Though the zero value isn't always -1.38778e-17. You can find a screenshot of incorrect and correct axis here: http://accipter.org/pub/qwt-scale-problem.png I have tried my program in both linux and windows environments, and it appears to only happen on windows (qt-4.4.0 with mingw). Let me know if you need me to supply the code. Albert ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone Albert Kottke 2008-05-12T15:49:27 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1330 Hallo. This is almost copy of class SpectromData by Matthias Pospiech. I tried to use it in the same purposes. Below the code as I use it. Data in a array are transferred from QList from other class. This QList contains only one element. In comments actually transferred values are shown. A problem that I see distort picture on a plot. I think I made a mistake with filling of array or something else. Where is my mistake? **********************header********************** class SpectrogramData: public QwtRasterData { private: double *m_Array; struct structMinMax{ double min; double max; }; structMinMax m_RangeX; structMinMax m_RangeY; structMinMax m_RangeZ; struct structXY{ double x; double y; }; structXY m_DataSize; structXY m_RealToArray; public: // Constructor giving back the QwtRasterData Constructor SpectrogramData(): QwtRasterData() { m_Array = NULL; } ~SpectrogramData() { if (m_Array != NULL) delete [] m_Array; } virtual QwtRasterData *copy() Dmitry Khaneft 2008-05-12T10:39:23 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1328 ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone_______________________________________________ qwt-interest mailing list qwt-interest< at >lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/qwt-interest Livio Tenze 2008-05-09T07:08:23 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1326 Hi, Is it possible to have two different fill colors in QwtPlotCurve ? I am writing a seismogram plot and the convention there is to have two different fill colors for positive and negative values (f.ex. fill black for values above baseline and white for those below). I have used two overlapping curves and it looks kind of ok but sometimes I get some artifacts which I guess are caused by the two curves not fully overlapping for certain sizes of the widget as well as having to allocate twice the amount of memory. Thanks in advance, Kamran ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone kamran iranpour 2008-05-07T13:41:29 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1319 Hi all, I have released QwtPolar 0.0.1 This release fixes a couple of bugs in the project files for Windows. QwtPolar 0.0.1 needs Qwt >= 5.1.0. Enjoy, Uwe ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone Uwe Rathmann 2008-05-01T15:31:17 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1318 Hi all, I have released Qwt 5.1.0. It is a maintenance release with a couple of incompatible changes and new features. Many of the changes are made for the QwtPolar package. See the change log below. Enjoy, Uwe Changes ------- 1) QwtSymbol::copy introduced Now it is possible to use derived symbol classes for curves 2) QwtPlotScaleItem introduced A new type of plot item for displaying axes on the canvas 3) QwtClipper added A collection of clipping algos 4) Using DBL_EPSILON This change allows smaller intervals for sliders/dials 5) QwtPanner setOrientation() added. 6) QwtPlot axisStepSize() added clear is virtual now 7) QwtPlotPrintFilter PrintCanvasBackground splitted into PrintBackground, PrintFrameWithScales 8) QwtPlotZoomer setZoomStack() added 9) Changes for the QwtPolar package QwtLegendItemManager introduced QwtMagnifier introduced 10)Suffix rules added in qwtconfig.pri for different targets for debug/release builds. Bug Fixes --------- 1. QwtAbstractScaleDraw Uwe Rathmann 2008-05-01T14:44:17 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1312 When I use my spectrogram plot and plot a few 100 times, my memory is at its end. This is caused by the copy of QwtRasterData : virtual QwtRasterData *copy() const { SpectrogramData *clone = new SpectrogramData(); clone->setRangeX(m_RangeX.min, m_RangeX.max); clone->setRangeY(m_RangeY.min, m_RangeY.max); clone->setBoundingRect(QwtDoubleRect(m_RangeX.min, m_RangeY.min, m_RangeX.max, m_RangeY.max)); clone->setData(m_Array, m_DataSize.x, m_DataSize.y); return clone; } this calls setData which saves to array to the 'clone' void setData(double * Array, int sizex, int sizey) { int size = sizex * sizey; if (m_Array != NULL) delete [] m_Array; m_Array = new double [size]; memcpy(m_Array, Array, size * sizeof(double)); } The clone always has m_Array == NULL, since it always created new. So m_Array = new double [size]; is always excecuted within the clone, but never deleted by the QwtRast Matthias Pospiech 2008-04-30T14:11:30 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1311 ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone_______________________________________________ qwt-interest mailing list qwt-interest< at >lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/qwt-interest Klaus Schneider 2008-04-30T14:06:15 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1310 Dear list, some very good news. Yesterday I started playing around with my new application wich has to draw 40.000 points 5 times per second. I implement all neccersary classes and get started. My computer is a high-end Quad-Core (Win XP, Qt 4.3.4, qwt 5.1 SVN) and my application brings it to 50% usage and the program was unusable due to high reaction times in the GUI. I run VTune and saw that most CPU power were lost directly in the QT-libs, not in my classes or even in some QWT related stuff. Yesterday evening I was a bit frustrating at thought about implementing increment drawing or level of detail and so on for tuning. Tomorrow I saw that Qt 4.4.0 is out and thought: give it a try. I install it and run my test again. I can't believe my eyes. CPU useage is around only 5% and that is caused ONLY (my plots live in a TabWidget, so I can hide them that they dont't get updated) by my data acquisition. My hint for all 'performance-junks' try out QT 4.4.0. Best Regards, Ingo ------------------- Ingo Maindorfer 2008-04-30T06:27:30 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1300 If I apply absolut constant data to the RasterData of a spectrogramplot the application crashes if I try to view the plot. All my code is passed, but only if I bring the plot to the foreground the application crashes. I cannot debugthe problem, since the whole code used at that point is within the qwt dll. The error is: ASSERT failure in QVector<T>::operator[]:"index out of range", file c:\.../qvector.h, line 320 Matthias ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone Matthias Pospiech 2008-04-28T19:25:59 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1293 Hi all, is there a way to clear the zoom stack without forcing a replot? I need to synchronize several QwtPlot objects. To do that I basically call a zoom(rect). But since the plots may also have an independent zoom I cannot live with the actual zoom stack during synchronization. That means I have to clear the previous zoom stack. I found a workaround as follows but I would like to know if there is a better way to implement that. derive MyPlot from QwtPlot reimplement replot() virtual method and check for a flag. Call QwtPlot::replot() depending on that flag. in the sync zoom method: - set the flag to false to disable replot - zoomer->zoom(0) - set the flag to true to reset the default behaviour Thanks for your help Gianni ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;19875767 Gianni Ambrosio 2008-04-28T11:34:05 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1291 I am using the example code form the spectrogramm example. I changed in such a way that it excepts data arrays, which works good and has been discussed here as well. Now I experience that any zoom done in the running programm zoom automatically step by step to the maximum zoom, which is basically a singel pixel of the data array. The zoom therefore is practically usedless. Any ideas how to debug this are welcome. Matthias Here the code class MyZoomer: public QwtPlotZoomer { public: MyZoomer(QwtPlotCanvas* canvas): QwtPlotZoomer(canvas) { setTrackerMode(QwtPicker::AlwaysOn); } protected: virtual QwtText trackerText( const QwtDoublePoint& p ) const { QwtText t( QwtPlotPicker::trackerText( p )); QColor c(Qt::white); c.setAlpha(180); t.setBackgroundBrush( QBrush(c) ); return t; } }; void QSpectrogramPlot::setData(double * Array, int sizex, int sizey) { m_RasterData.setData(Array, sizex, sizey); m_spectrogram->setData(m_Ra Matthias Pospiech 2008-04-27T12:48:54 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1279 Hello all- I am trying to install QWT integrated with my Eclipse installation on Windows XP. I have had Eclipse 3.3.1.1 installed for some time. I installed the MinGW binary version of QT 4.3.4 (open source version), and had it refresh my MinGW installation since there was an issue with my w32api.h file. I then installed QWT 5.0.2 using the instructions for a MinGW installation (i.e. qmake/make). Then copied the resultant lib/qwt5.dll into the QT bin folder, lib/libqwt5.a into the QT lib folder, and the designer/plugins/designer/qwt_designer_plugin.dll and libqwt_designer_plugin.a files into the QT plugins/designer folder. If I open Designer I see the QWT widgets in the Widget Box just fine. I then installed the QT Eclipse Integration v1.0.1 and, when opening Eclipse with MinGW, I can open the Widget Box but it doesn't show the plugin widgets (no Arthur and no QWT widgets). I suspect that there may be a more general problem with the integration between QT and Eclipse, but since one of t Claus Hetzer 2008-04-24T20:03:36 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1272 Has anyone had success labeling QwtPlots with QwtPlotMarkers, then exporting the plots to pdf or a printer? If so, do you create std::vector<QwtPlotMarker> to hold the markers? QList<QwtPlotMarker>? Dynamically allocated arrays, viz., QwtPlotMarker *markerArray = 0; try{markerArray = new QwtPlotMarker [numberToBeUsed];} catch(...){return MEMORY_ALLOCATION_ERROR;} I'll expect that whatever you do, your collection of QwtPlotMarkers is a class attribute, since anything else would be crazy. Uwe suggested that I try to compile the entire source of Qwt into my own app. I will try this in the next few days, but since my compilation environment (basically just qmake -project ; qmake ; make) is not compatible with the elegant, non-local architecture of the qwt project files, and I would (and could) break a lot to make it work. Indeed, getting qwt to compile outside its tidy architecture will be a do-able, but nontrivial, project. However, since the QwtPlotMarkers appear on the screen AOK, the problem is not lik Peter Leopold 2008-04-23T20:34:24 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1264 Hi all, I launched a new project QwtPolar for displaying values on a polar coordinate system. It is hosted at sourceforge: http://qwtpolar.sourceforge.net. I have uploaded an initial release QwtPolar-0.0.0 that offers the basics like the axes, grids curves and markers. For the navigation panning and zooming with the wheel are supported. QwtPolar-0.0.0 was developed and tested on Linux/X11 only. I'm looking for volunteers, who are willing to build and test the code on the other platforms. Please post the result of your test in the table below. Qt4 Qt3 --------------------------------- Linux/g++ | X | X | Windows/Mingw | | | Windows/MSVC | | | Mac | | | ... | | | I'm also interested in comments and feature requests. I never used polar plots myself and might have missed very basic requirements. For building QwtPolar you need a SVN snapshot from the 5 Uwe Rathmann 2008-04-17T20:00:12 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1256 This here is the example qwt delivers: class SpectrogramData: public QwtRasterData { public: SpectrogramData(): QwtRasterData(QwtDoubleRect(-1.5, -1.5, 3.0, 3.0)) {} virtual QwtRasterData *copy() const { return new SpectrogramData();} virtual QwtDoubleInterval range() const { return QwtDoubleInterval(0.0, 10.0);} virtual double value(double x, double y) const{ const double c = 0.842; const double v1 = x * x + (y-c) * (y+c); const double v2 = x * (y+c) + x * (y+c); return 1.0 / (v1 * v1 + v2 * v2); } }; In my problem the data however has to be delivered to the plot as a double array (2D Array). Since I think that I do not understand the example really ( it is a bit advance c++) I would need to know where and how to integrate a function which delivers the data from an array to the QwtRasterData. This means as well that the range can not be know at construction of the class (as in the example) but only after the data has been set. Matthias ------------------------------------------ Matthias Pospiech 2008-04-16T13:54:07 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1252 ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone_______________________________________________ qwt-interest mailing list qwt-interest< at >lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/qwt-interest Vikram Nyamthi 2008-04-16T04:07:32 http://comments.gmane.org/gmane.comp.graphics.qwt.general/1250 I implemented my plot in the following way: widgetCurvePlot1->qwtPlot->enableAxis(QwtPlot::yRight); widgetCurvePlot1->qwtPlot->setAxisScaleEngine(QwtPlot::yRight, widgetCurvePlot1->ylinearScaleEngine); widgetCurvePlot1->qwtPlot->setTitle("results"); widgetCurvePlot1->qwtPlot->insertLegend( &widgetCurvePlot1->legend, QwtPlot::BottomLegend); widgetCurvePlot1->qwtPlot->setAxisTitle(QwtPlot::xBottom, "Time / s"); widgetCurvePlot1->qwtPlot->setAxisTitle(QwtPlot::yLeft, "Energy / nJ"); widgetCurvePlot1->qwtPlot->setAxisTitle(QwtPlot::yRight, "Gain / %"); widgetCurvePlot1->qwtPlot->setAxisAutoScale(QwtPlot::xBottom); widgetCurvePlot1->qwtPlot->setAxisAutoScale(QwtPlot::yLeft); widgetCurvePlot1->qwtPlot->setAxisAutoScale(QwtPlot::yRight); widgetCurvePlot1->Curve[1].setRenderHint(QwtPlotItem::RenderAntialiased); widgetCurvePlot1->Curve[1].setTitle("Gain"); widgetCurvePlot1->Curve[1].setStyle(QwtPlotCurve::Lines); widgetCurvePlot1->Cu Matthias Pospiech 2008-04-15T08:42:23 Search the mailing list at Gmane query http://search.gmane.org/?group=$group=gmane.comp.graphics.qwt.general