Hi Thomas,
> Hi,
>
> do TCanvas::Paint() instead of TCanvas::Update().
that's not enougth. In many cases TCanvas::Update is called indirectly, e.g.
when you type "Return" in console, when using root browser etc.
Regards. Valeriy
> To display it use:
> TCanvas::Flush();
>
> (maybe you have to call TCanvas::FeedbackMode(kFALSE) before Paint())
>
> Thomas.
>
> Valeriy Onuchin wrote:
> > Hi Paolo,
> > as far as I understood you would like to set your own procedure
> > when to display content of canvas. A solution would be creation
> > class MyCanvas derived from TCanvas with PaintModified() overloaded, e.g
> >
> > void MyCanvas::PaintModified()
> > {
> > if (!gReadyToShow) return;
> > else TCanvas::PaintModified();
> > }
> >
> > and put MyCanvas objects into TRootEmbeddedCanvases instead of TCanvases
> > Calling TCanvas::Update will not display canvas untill gReadyToShow flag is set on.
> >
> > Regards. Valeriy
> >
> >
> > Hi Valeriy,
> >
> > no, I meant only to prepare the TRootEmbedded canvas in memory in the final
> > form as I see it on screen but without displaying it.
> >
> > Paolo
> >
> > On Monday 23 June 2003 10:12, you wrote:
> >
> >> Hi Paolo,
> >>not clear for me "fill completely the picture in memory ".
> >>Does it mean a picture of the whole of "Display Window"?
> >>
> >>Regards. Valeriy
> >>
> >>
> >>>Hi all,
> >>>
> >>>I would like to hear your opinion about the following ideas.
> >>>
> >>>In my program I built a Display Window which is essentially composed by a
> >>>matrix of TRootEmbeddedCanvas. In every Embedded Canvas is painted an
> >>>histogram. Now I would like to fill completely the picture in memory to
> >>>display it only when it is needed: the effect should be of a "ready to
> >>>see" picture appearing on the screen. I know that TRootEmbeddedCanvas
> >>>creates a TGCanvas in which a TCanvas is created, and that a TCanvas is
> >>>built using "double buffer" tecnique, but I can't figure out how I can
> >>>achieve the "ready to see" effect (perhaps using TPad::CopyPixmaps()?).
> >>>
> >>>Just for example I attach my present code.
> >>>Thanks,
> >>>
> >>>Paolo
> >>>
> >>>
> >>>/************************************************************************
> >>>*** TC_ScrollingTabFrame.cpp - description -------------------
> >>> begin : Thu May 8 2003
> >>> copyright : (C) 2003 by Paolo ADRAGNA
> >>> email : paolo.adragna@pi.infn.it
> >>>
> >>>*************************************************************************
> >>>**/
> >>>
> >>>/************************************************************************
> >>>*** *
> >>> * * This program is free software; you can redistribute it and/or
> >>>modify * * it under the terms of the GNU General Public License as
> >>>published by * * the Free Software Foundation; either version 2 of the
> >>>License, or * * (at your option) any later version.
> >>> * *
> >>> *
> >>>*************************************************************************
> >>>**/
> >>>
> >>>#include "TC_ScrollingTabFrame.h"
> >>>#include "TC_CanvasUpdateAsynch.h"
> >>>
> >>>ClassImp(TC_ScrollingTabFrame)
> >>>
> >>>TC_ScrollingTabFrame::TC_ScrollingTabFrame() :
> >>>TGCanvas(GetViewPort(),700,650) {}
> >>>
> >>>TC_ScrollingTabFrame::TC_ScrollingTabFrame(TGTab * tab, char *grp, char *
> >>>nam, Int_t id_, Int_t nhs, TH1 *hist[], char *options[], char
> >>>*Poptions[]) : TGCanvas(tab,550,650)
> >>>{
> >>>
> >>> status = 0;
> >>> group = new TString(grp);
> >>> name = new TString(nam);
> >>> id = id_;
> >>>
> >>> // Make a new tab explicitly building it, instead of calling Add in
> >>>order to add a ScrollingTabFrame
> >>> tab->AddFrame(new TGTabElement(tab, new TGString(nam), 50, 20,
> >>>tab->GetDefaultGC().GetGC(),
> >>>tab->GetDefaultFontStruct()),
> >>> 0);
> >>>
> >>> fFrame = new TGCompositeFrame(GetViewPort(), 60, 20);
> >>> fFrame->SetLayoutManager(new TGMatrixLayout(fFrame,0,2,10));
> >>> SetContainer(fFrame);
> >>>
> >>> TStyle *myStyle = (TStyle*) gROOT->FindObject("Plain1");
> >>> if(myStyle)
> >>> {
> >>> myStyle->cd();
> >>> }
> >>> else
> >>> {
> >>> printf("Warning. Style Plain1 not founded\n");
> >>> }
> >>>
> >>> int i;
> >>> for (i=0;i<nhs;i++)
> >>> {
> >>> char *s = new char[30];
> >>> sprintf(s,"%s_%i",nam,i);
> >>> TRootEmbeddedCanvas *fECanvas = new
> >>>TRootEmbeddedCanvas(s,fFrame,300,250);
> >>> ecanvas.push_back(fECanvas);
> >>> TCanvas *c = fECanvas->GetCanvas();
> >>> if(strcmp(Poptions[i],"Logy") == 0) c->SetLogy();
> >>> c->cd();
> >>> c->AddExec("Popuppad","TC_ScrollingTabFrame::PopUpPad()");
> >>> hist[i]->Draw(options[i]);
> >>> AddFrame(fECanvas);
> >>> }
> >>>
> >>>}
> >>>
> >>>TC_ScrollingTabFrame::~TC_ScrollingTabFrame()
> >>>{
> >>> for(int i=0; i<(int)ecanvas.size(); i++)
> >>> {
> >>> delete ecanvas[i];
> >>> }
> >>> delete fFrame;
> >>>}
> >>>
> >>>void TC_ScrollingTabFrame::PopUpPad()
> >>>{
> >>> int event = gPad->GetEvent();
> >>> if(event == 61)
> >>> {
> >>> TObject *select = gPad->GetSelected();
> >>> if (!select) return;
> >>> // For a TH1 the selectd object is a TFrame, not the TH1
> >>> // So we must select it
> >>> if (!select->InheritsFrom("TH1"))
> >>>{
> >>> TList *primitives = gPad->GetListOfPrimitives();
> >>> TListIter next(primitives);
> >>> TObject *to;
> >>> while ((to=next()))
> >>> {
> >>> if(to->InheritsFrom("TH1")) {select = to;}
> >>> }
> >>>}
> >>> if (select->InheritsFrom("TH1"))
> >>>{
> >>> Int_t logy = gPad->GetLogy();
> >>> TH1 *h = (TH1*)gROOT->FindObject(select->GetName());
> >>> char *name = new char[100];
> >>> sprintf(name,"padCanvas%s",h->GetName());
> >>> TCanvas *canvas = new TCanvas(name,h->GetTitle(),600,400);
> >>> new TC_CanvasUpdateAsynch(canvas,(Long_t)2000);
> >>> sprintf(name,"padPad%s",h->GetName());
> >>> TPad *p = new TPad(name,h->GetTitle(),0.05,0.05,0.95,0.95);
> >>> if(logy) p->SetLogy();
> >>> p->Draw();
> >>> p->cd();
> >>> file://TStyle *myStyle = new TStyle("Plain2","Generic");
> >>> file://myStyle->SetTitleFont(42);
> >>> if(select->InheritsFrom("TH2F"))
> >>> {
> >>> file://myStyle->SetOptStat(10);
> >>> TStyle *myStyle = (TStyle*) gROOT->FindObject("PlainPopup2");
> >>> if(myStyle)
> >>>{
> >>> myStyle->cd();
> >>>}
> >>> else
> >>>{
> >>> printf("Warning. Style PlainPopup2 not founded\n");
> >>>}
> >>> h->Draw("lego2");
> >>> }
> >>> else
> >>> {
> >>> file://myStyle->SetOptStat(111111);
> >>> TStyle *myStyle = (TStyle*) gROOT->FindObject("PlainPopup1");
> >>> if(myStyle)
> >>>{
> >>> myStyle->cd();
> >>>}
> >>> else
> >>>{
> >>> printf("Warning. Style PlainPopup1 not founded\n");
> >>>}
> >>> h->Draw("hist");
> >>> }
> >>>
> >>>}
> >>> }
> >>>}
> >>>
> >>>void TC_ScrollingTabFrame::SetVisibleFlag(bool flag)
> >>>{
> >>> status = GetSelectedFlag();
> >>> if (flag) { status = DW_SELECTED | DW_VISIBLE; }
> >>>}
> >>>
> >>>void TC_ScrollingTabFrame::SetSelectedFlag(bool flag)
> >>>{
> >>> status = 0;
> >>> SetVisibleFlag(flag);
> >>>}
> >>>
> >>>Bool_t TC_ScrollingTabFrame::ProcessMessage(Long_t msg, Long_t parm1,
> >>>Long_t parm2)
> >>>{
> >>> return TGCanvas::ProcessMessage(msg,parm1,parm2);
> >>>}
> >>>
> >>>void TC_ScrollingTabFrame::Update()
> >>>{
> >>>
> >>> if((!GetVisibleFlag()) || (ecanvas.size()<=0) ) {return;}
> >>>
> >>> TStyle *myStyle = (TStyle*) gROOT->FindObject("Plain1");
> >>> if(myStyle)
> >>> {
> >>> myStyle->cd();
> >>> }
> >>> else
> >>> {
> >>> printf("Warning. Style Plain1 not founded\n");
> >>> }
> >>> for(int i=0; i<(int)ecanvas.size(); i++)
> >>> {
> >>> TCanvas *c = ecanvas[i]->GetCanvas();
> >>> c->Modified();
> >>> c->Update();
> >>> }
> >>>}
> >
> >
> >
> >
> >
>
>
This archive was generated by hypermail 2b29 : Thu Jan 01 2004 - 17:50:12 MET