Is it possible to use Python to script a ROOT GUI application?
The following example doesn’t open a window. If it is possible to open a gui window, how do I keep it from immediately closing?
[code]import ROOT
import os, sys
ROOT.gClient.GetRoot()
fMain = ROOT.TGMainFrame(ROOT.gClient.GetRoot(),300,300)
fMain.SetWindowName(“ROOT GUI”)
fEcanvas = ROOT.TRootEmbeddedCanvas(“Ecanvas”,fMain,800,600)
fMain.AddFrame(fEcanvas, ROOT.TGLayoutHints(ROOT.kLHintsExpandX| ROOT.kLHintsExpandY,10,10,10,1))
fMain.ShowFrame( fEcanvas )
fMain.Activate(1)
print “Does this do anything?”[/code][/code]
Hi Dennis,
Please replace the lines:fMain.ShowFrame( fEcanvas )
fMain.Activate(1) with:fMain.MapSubwindows()
fMain.Resize(fMain.GetDefaultSize())
fMain.MapWindow() The MapSubwindows method maps all child frames of fMain; the layout algorithm is called by Resize (to apply TGLayoutHints settings), and in the end, the MapWindow method makes fMain appear on the screen.
Best regards, Ilka
Thanks Ilka. 
Now the window opens but is immediately closed. Is there a way to keep it open until the user closes it?
[code]import ROOT
import os, sys
ROOT.gClient.GetRoot()
fMain = ROOT.TGMainFrame(ROOT.gClient.GetRoot(),300,300)
fMain.SetWindowName(“CTT EXAMINE”)
fEcanvas = ROOT.TRootEmbeddedCanvas(“Ecanvas”,fMain,800,600)
fMain.AddFrame(fEcanvas, ROOT.TGLayoutHints(ROOT.kLHintsExpandX| ROOT.kLHintsExpandY,10,10,10,1))
fMain.MapSubwindows()
dimensions = fMain.GetDefaultSize()
fMain.Resize(dimensions.fWidth,dimensions.fHeight)
fMain.MapWindow()
print “Does this do anything?”[/code] [/quote]
Hi Dennis,
I asked the same question this morning and the answer was to usepython -i your_code.pyCheers, Ilka
