Re: Creating a status bar

Hi Matthew,

The last line in your method ResalGUI::ExecEvent can be: fStatusBar->SetText(gROOT->GetSelectedPad()->GetObjectInfo(px,py),3); This way any time users click with the middle mouse button to select a pad, the (x,y) information shown by the status bar will be related to the selected pad.

Cheers, Ilka

matthew.a.barker_at_nexiasolutions.com wrote:
> Folks,
>
> I have two TRootEmbeddedCanvas objects inside a TGMainFrame. I am trying
> to create a status bar on the TGMainFrame that mimics the behaviour of the
> status bar provided in TCanvas. So I want the status bar to display the
> information relating to (for example) histograms which are drawn on
> separate pads -- the pads are drawn on the TCanvas that is owned by the
> TRootEmbeddedCanvas. At the moment I have the code below. However, the
> problem is that the x and y positions passed to ExecEvent refer to the
> underlying canvas -- rather than the pad on which the selected object
> exists. This means that the line
> fStatusBar->SetText(selected->GetObjectInfo(x,y),3);
> yields meaningless information because the x and y do not refer to the
> correct coordinate system.
>
> How do I obtain the position in the pad that the selected object is in?
>
>
> Matthew Barker
>
>
>
> ResalGUI::ResalGUI(){
> ...
> ECan1 = new TRootEmbeddedCanvas(0,MainFrame,340,180); // MainFrame is
> the TGMainFrame
> Can1 = ECan1->GetCanvas();
> MainFrame->AddFrame(ECan1, new TGLayoutHints(kLHintsLeft | kLHintsTop |
> kLHintsExpandX | kLHintsExpandY,5,5,5,5));
>
> ECan2 = new TRootEmbeddedCanvas(0,MainFrame,340,180);
> MainFrame->AddFrame(ECan2, new TGLayoutHints(kLHintsLeft | kLHintsTop |
> kLHintsExpandX | kLHintsExpandY,5,5,5,5));
> Can2 = ECan2->GetCanvas();
>
> Can1->Connect("ProcessedEvent(Int_t,Int_t,Int_t,TObject*)", "ResalGUI",
> this, "ExecEvent(Int_t,Int_t,Int_t,TObject*)");
> Can2->Connect("ProcessedEvent(Int_t,Int_t,Int_t,TObject*)", "ResalGUI",
> this, "ExecEvent(Int_t,Int_t,Int_t,TObject*)");
> ...
> }
>
>
>
> void ResalGUI::ExecEvent(Int_t event, Int_t x, Int_t y, TObject *selected)
> {
>
> TCanvas *c = (TCanvas *) gTQSender;
> const Int_t kTMAX=256;
> static char atext[kTMAX];
>
> fStatusBar->SetText(selected->GetTitle(),0); //fStatusbar is my
> status bar, embedded into the TMainFrame
> fStatusBar->SetText(selected->GetName(),1);
> if (event == kKeyPress)
> sprintf(atext, "%c", (char) x);
> else
> sprintf(atext, "%d,%d", x, y);
> fStatusBar->SetText(atext,2);
> fStatusBar->SetText(selected->GetObjectInfo(x,y),3);
> }
>
>
>
>
>
>
>
>
>
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Received on Tue Jan 23 2007 - 13:33:14 CET