Hi Nathan, the TPad structure is aimed at graph drawing (functions, histograms, etc.). A TPad defines linear and log scales, supports scaling (when pad is resized), postscript output, etc. However, as you noticed, it lacks many features to build nice GUI's (the button and slider were "quick hacks" to get some basic GUI going). After many requests from our users we introduced the XClass'95 derived widget set. In principle there is no problem using the TPad and TG widgets in the same window. However, we've not yet exported the necessary hooks from the basic TCanvas class yet. We were waiting with this because we hoped to get also the Win32 version of the TG classes implemented, so we would not break ROOT's cross-platform capabilities (TPad's work on both X11 and Win32). Alas, we did not yet find the resources (i.e. volunteers) for a Win32 version of the TG classes. Anyway, to not longer hold up the X11 users we will come in August with TCanvas that can also accept TG widgets. Any volunteers who want to work on the Win32 port of the TG classes are welcome. In principle only the functions in the ROOT source file X11_GX11Gui.cxx should be ported to Win32. All TG classes use the basic functions defined in this file. Cheers, Fons. > > Rene Brun wrote: > > > In the recently released version 2.09, I have added a new tutorial > > xyslider illustrating how to use two sliders to control the bondaries > > of a 2 dim plot. The control is via a user interpreted function. > > For more info and the example, see: > > http://root.cern.ch/root/html/TSlider.html > > Thanks! Good tutorial, and one that will help with my immediate problem. > > But I'm still confused about one thing: the interface (or > non-interface) between the GUI classes (TG[A-Z]...) and the non-GUI > classes. While there are a handful of GUI-like components you can use in > TPads (TButton, TSlider, etc.), there is an entire collection of > GUI components (all the stuff ported from XClass '95) that is not > compatible for use in TPads -- as far as I can tell. Am I wrong? > > Maybe I just need to play with things some more. To be honest, as a > longtime X/Motif programmer, I understand the GUI classes -- the hierarchy, > geometry management, etc. -- while I find the TPad-derived classes quite > mysterious: for example, how does your xslider know to be a horizontal > slider and your yslider know to be vertical? I guess I just haven't wrapped > my mind around the TPad way of managing objects. > > Nathan Meyers > nmeyers@teleport.com > > > > --------------597732635FBD-- -- Org: CERN, European Laboratory for Particle Physics. Mail: 1211 Geneve 23, Switzerland Phone: +41 22 7679248 E-Mail: Fons.Rademakers@cern.ch Fax: +41 22 7677910
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