TGedEditor.cxx

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// @(#)root/ged:$Id$
// Author: Marek Biskup, Ilka Antcheva 02/08/2003
 
/*************************************************************************
 * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
 
/* \class TGedEditor
    \ingroup ged
 
The main class of ROOT graphics editor. It manages the appearance
of objects editors according to the selected object in the canvas
(an object became selected after the user click on it using the
left-mouse button).
 
Every object editor provides an object specific GUI and follows a
simple naming convention: it has as a name the object class name
concatenated with 'Editor' (e.g. for TGraph objects the object
editor is TGraphEditor).
 
The ROOT graphics editor can be activated by selecting 'Editor'
from the View canvas menu, or SetLine/Fill/Text/MarkerAttributes
from the context menu. The algorithm in use is simple: according to
the selected object <obj> in the canvas it looks for a class name
<obj>Editor. If a class with this name exists, the editor verifies
that this class derives from the base editor class TGedFrame.
It makes an instance of the object editor, scans all object base
classes searching the corresponding object editors and makes an
instance of the base class editor too. Once the object editor is in
place, it sets the user interface elements according to the object
state and is ready for interactions. When a new object of a
different class is selected, a new object editor is loaded in the
editor frame. The old one is cached in memory for potential reuse.
 
Any created canvas will be shown with the editor if you have a
.rootrc file in your working directory containing the line:
Canvas.ShowEditor:      true
 
An created object can be set as selected in a macro by:
canvas->Selected(parent_pad_of_object, object, 1);
The first parameter can be the canvas itself or the pad containing
'object'.
 
*/
 
 
#include "TGedEditor.h"
#include "TCanvas.h"
#include "TGCanvas.h"
#include "TGTab.h"
#include "TGedFrame.h"
#include "TROOT.h"
#include "TClass.h"
#include "TBaseClass.h"
#include "TVirtualX.h"
 
 
class TGedTabInfo : public TObject {
   // Helper class for managing visibility and order of created tabs.
public:
   TGTabElement      *fElement;
   TGCompositeFrame  *fContainer;
 
   TGedTabInfo(TGTabElement* el, TGCompositeFrame* f) :
      fElement(el), fContainer(f) {}
};
 
 
 
TGedEditor* TGedEditor::fgFrameCreator = 0;
 
////////////////////////////////////////////////////////////////////////////////
/// Returns TGedEditor that currently creates TGedFrames.
 
TGedEditor* TGedEditor::GetFrameCreator()
{
   return fgFrameCreator;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Set the TGedEditor that currently creates TGedFrames.
 
void TGedEditor::SetFrameCreator(TGedEditor* e)
{
   fgFrameCreator = e;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Constructor of graphics editor.
 
TGedEditor::TGedEditor(TCanvas* canvas, UInt_t width, UInt_t height) :
   TGMainFrame(gClient->GetRoot(), width, height),
   fCan          (0),
   fTab          (0),
   fTabContainer (0),
   fModel        (0),
   fPad          (0),
   fCanvas       (0),
   fClass        (0),
   fGlobal       (kTRUE)
{
   fCan = new TGCanvas(this, 170, 10, kFixedWidth);
   AddFrame(fCan, new TGLayoutHints(kLHintsExpandY | kLHintsExpandX));
 
   fTab = new TGTab(fCan->GetViewPort(), 10, 10);
   fTab->Associate(fCan);
   fTab->SetCleanup(kDeepCleanup);
   fCan->SetContainer(fTab);
 
   fTabContainer = GetEditorTab("Style");
 
   gROOT->GetListOfCleanups()->Add(this);
 
   SetCanvas(canvas);
   if (fCanvas) {
      UInt_t ch = fCanvas->GetWindowHeight();
      if (ch)
         Resize(GetWidth(), ch > 700 ? 700 : ch);
      else
         Resize(GetWidth(), fCanvas->GetWh()<450 ? 450 : fCanvas->GetWh() + 4);
   } else {
      Resize(width, height);
   }
 
   MapSubwindows();
   MapWindow();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Editor destructor.
 
TGedEditor::~TGedEditor()
{
   Hide();
 
   if(fGlobal){
      TQObject::Disconnect("TCanvas", "Selected(TVirtualPad *, TObject *, Int_t)");
      TQObject::Disconnect("TCanvas", "Closed()");
   }
 
   // delete class editors
   TIter next(fFrameMap.GetTable());
   TPair* pair;
   while ((pair = (TPair*) next())) {
      if (pair->Value() != 0) {
         TGedFrame* frame  = (TGedFrame*) pair->Value();
         delete frame;
      }
   }
 
   TGedTabInfo* ti;
   TIter it1(&fCreatedTabs);
   while ((ti = (TGedTabInfo*) it1())) {
      fTab->AddFrame(ti->fElement,0);
      fTab->AddFrame(ti->fContainer,0);
   }
 
   delete fTab;
   delete ((TGFrameElement*)fList->First())->fLayout;
   delete fCan;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Virtual method that is called on any change in the dependent frames.
/// This implementation simply calls fPad Modified()/Update().
 
void TGedEditor::Update(TGedFrame* /*frame*/)
{
   if (fPad) {
      fPad->Modified();
      fPad->Update();
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Find or create tab with name.
 
TGCompositeFrame* TGedEditor::GetEditorTab(const char* name)
{
   return GetEditorTabInfo(name)->fContainer;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Find or create tab with name.
 
TGedTabInfo* TGedEditor::GetEditorTabInfo(const char* name)
{
   // look in list of created tabs
   if ( ! fCreatedTabs.IsEmpty()) {
      TIter next(&fCreatedTabs);
      TGedTabInfo* ti;
      while ((ti = (TGedTabInfo *) next())) {
         if (*ti->fElement->GetText() == name)
            return ti;
      }
   }
 
   // create tab
   TGCompositeFrame* tc = fTab->AddTab(new TGString(name));
 
   // remove created frame end tab element from the fTab frame
   TGTabElement *te = fTab->GetTabTab(fTab->GetNumberOfTabs() - 1);
   fTab->RemoveFrame(tc);
   fTab->RemoveFrame(te);
 
   // create a title frame for each tab
   TGedFrame* nf = CreateNameFrame(tc, name);
   if (nf) {
      nf->SetGedEditor(this);
      nf->SetModelClass(0);
      tc->AddFrame(nf, new TGLayoutHints(kLHintsTop | kLHintsExpandX, 2, 2, 2, 2));
   }
   // add to list of created tabs
   TGedTabInfo* ti = new TGedTabInfo(te, tc);
   fCreatedTabs.Add(ti);
 
   return ti;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Called when closed via WM close button. Calls Hide().
 
void TGedEditor::CloseWindow()
{
   Hide();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Clears windows in editor tab.
/// Unmap and withdraw currently shown frames and thus prepare for
/// construction of a new class layout or destruction.
 
void TGedEditor::ReinitWorkspace()
{
   TIter next(&fVisibleTabs);
   TGedTabInfo* ti;
   while ((ti = (TGedTabInfo*)next())) {
      TGTabElement     *te = ti->fElement;
      TGCompositeFrame *tc = ti->fContainer;
 
      fTab->RemoveFrame(te);
      fTab->RemoveFrame(tc);
 
      TIter frames(tc->GetList());
      frames(); // skip name-frame
      TGFrameElement* fr;
      while ((fr = (TGFrameElement *) frames()) != 0) {
         TGFrame *f = fr->fFrame;
         tc->RemoveFrame(f);
         f->UnmapWindow();
         te->UnmapWindow();
         tc->UnmapWindow();
      }
      fVisibleTabs.Remove(ti);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Set editor global.
 
void TGedEditor::SetGlobal(Bool_t global)
{
   fGlobal = global;
   if (fGlobal) {
      TQObject::Connect("TCanvas", "Selected(TVirtualPad *, TObject *, Int_t)",
                        "TGedEditor", this, "GlobalSetModel(TVirtualPad *, TObject *, Int_t)");
 
      TQObject::Connect("TCanvas", "Closed()",
                        "TGedEditor", this, "GlobalClosed()");
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Delete global editor if no canvas exists.
 
void TGedEditor::GlobalClosed()
{
   if (gROOT->GetListOfCanvases()->IsEmpty())
      TVirtualPadEditor::Terminate();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Set canvas to global editor.
 
void TGedEditor::GlobalSetModel(TVirtualPad *pad, TObject * obj, Int_t ev)
{
   if ((ev != kButton1Down) || !IsMapped() ||
       (obj && obj->InheritsFrom("TColorWheel")))
      return;
 
   TCanvas* can = pad->GetCanvas();
   // Do nothing if canvas is the same as before or
   // local editor of the canvas is active.
   if (!can || (can == fCanvas || can->GetShowEditor()))
      return;
 
   Show();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Connect this editor to the Selected signal of canvas 'c'.
 
void TGedEditor::ConnectToCanvas(TCanvas *c)
{
   c->Connect("Selected(TVirtualPad*,TObject*,Int_t)", "TGedEditor",
              this, "SetModel(TVirtualPad*,TObject*,Int_t)");
}
 
////////////////////////////////////////////////////////////////////////////////
/// Disconnect this editor from the Selected signal of fCanvas.
 
void TGedEditor::DisconnectFromCanvas()
{
   if (fCanvas)
      Disconnect(fCanvas, "Selected(TVirtualPad*,TObject*,Int_t)", this, "SetModel(TVirtualPad*,TObject*,Int_t)");
}
 
////////////////////////////////////////////////////////////////////////////////
/// Change connection to another canvas.
 
void TGedEditor::SetCanvas(TCanvas *newcan)
{
   if (fCanvas == newcan) return;
 
   DisconnectFromCanvas();
   fCanvas = newcan;
 
   if (!newcan) return;
 
   SetWindowName(Form("%s_Editor", fCanvas->GetName()));
   fPad = fCanvas->GetSelectedPad();
   if (fPad == 0) fPad = fCanvas;
   ConnectToCanvas(fCanvas);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Activate object editors according to the selected object.
 
void TGedEditor::SetModel(TVirtualPad* pad, TObject* obj, Int_t event, Bool_t force)
{
   if ((event != kButton1Down) || (obj && obj->InheritsFrom("TColorWheel")))
      return;
 
   if (gPad && gPad->GetVirtCanvas()) gPad->GetVirtCanvas()->SetCursor(kWatch);
   gVirtualX->SetCursor(GetId(), gVirtualX->CreateCursor(kWatch));
 
   fPad = pad;
   if (obj == 0) obj = fPad;
 
   // keep selected by name
   TGTabElement* seltab = fTab->GetCurrentTab();
 
   Bool_t mapTabs = kFALSE;
   if (fModel != obj || force) {
      fModel = obj;
      if (fModel == 0 || fModel->IsA() != fClass) {
         ReinitWorkspace();
         mapTabs = kTRUE;
         // add Style tab to list of visible tabs
         fVisibleTabs.Add(fCreatedTabs.First());
         if (fModel) {
            fClass = fModel->IsA();
            // build a list of editors
            ActivateEditor(fClass, kTRUE);
         } else {
            fClass = 0;
         }
 
         // add class editors to fTabContainer
         TGedFrame* gfr;
         TIter ngf(&fGedFrames);
         while ((gfr = (TGedFrame*) ngf()))
            fTabContainer->AddFrame(gfr, new TGLayoutHints(kLHintsTop | kLHintsExpandX, 2, 2, 2, 2));
 
         fExclMap.Clear();
         fGedFrames.Clear();
 
         // add visible tabs in fTab
         TIter next(&fVisibleTabs);
         TGedTabInfo* ti;
         while ((ti = (TGedTabInfo *) next())) {
            fTab->AddFrame(ti->fElement,0);
            fTab->AddFrame(ti->fContainer,0);
         }
      }
      ConfigureGedFrames(kTRUE);
   } else {
      ConfigureGedFrames(kFALSE);
   } // end fModel != obj
 
   if (mapTabs) { // selected object is different class
      TGedTabInfo* ti;
      TIter next(&fVisibleTabs);
      while ((ti = (TGedTabInfo *) next())) {
         ti->fElement->MapWindow();
         ti->fContainer->MapWindow();
      }
      if (seltab == 0 || fTab->SetTab(seltab->GetString(), kFALSE) == kFALSE)
         fTab->SetTab(0, kFALSE);
   }
 
   if (fGlobal)
      Layout();
   else
      ((TGMainFrame*)GetMainFrame())->Layout();
 
   if (gPad && gPad->GetVirtCanvas()) gPad->GetVirtCanvas()->SetCursor(kPointer);
   gVirtualX->SetCursor(GetId(), gVirtualX->CreateCursor(kPointer));
}
 
////////////////////////////////////////////////////////////////////////////////
/// Show editor.
 
void TGedEditor::Show()
{
   // gPad is setup properly in calling code for global and canvas editor.
   if (gPad) SetCanvas(gPad->GetCanvas());
 
   if (fCanvas && fGlobal) {
      SetModel(fCanvas->GetClickSelectedPad(), fCanvas->GetClickSelected(), kButton1Down);
 
      if (fCanvas->GetShowEditor())
         fCanvas->ToggleEditor();
 
      UInt_t dw = fClient->GetDisplayWidth();
      UInt_t cw = fCanvas->GetWindowWidth();
      UInt_t ch = fCanvas->GetWindowHeight();
      UInt_t cx = (UInt_t)fCanvas->GetWindowTopX();
      UInt_t cy = (UInt_t)fCanvas->GetWindowTopY();
      if (!ch)
         cy = cy + 20;      // embedded canvas protection
 
      Int_t gedx = 0, gedy = 0;
 
      if (cw + GetWidth() > dw) {
         gedx = cx + cw - GetWidth();
         gedy = ch - GetHeight();
      } else {
         if (cx > GetWidth())
            gedx = cx - GetWidth() - 20;
         else
            gedx = cx + cw + 10;
         gedy = cy - 20;
      }
      MoveResize(gedx, gedy, GetWidth(), ch > 700 ? 700 : ch);
      SetWMPosition(gedx, gedy);
   } else if (fCanvas) {
      SetModel(fCanvas, fCanvas, kButton1Down);
   }
   MapWindow();
   gVirtualX->RaiseWindow(GetId());
 
   if (!gROOT->GetListOfCleanups()->FindObject(this))
      gROOT->GetListOfCleanups()->Add(this);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Hide editor. The editor is put into non-active state.
 
void TGedEditor::Hide()
{
   UnmapWindow();
   ReinitWorkspace();
   fModel = 0; fClass = 0;
   DisconnectFromCanvas();
   fCanvas = 0; fPad = 0;
   gROOT->GetListOfCleanups()->Remove(this);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Remove references to fModel in case the fModel is being deleted.
/// Deactivate attribute frames if they point to obj.
 
void TGedEditor::RecursiveRemove(TObject* obj)
{
   if (obj == fPad) {
      // printf("TGedEditor::RecursiveRemove: %s - pad deleted.\n", locglob);
      SetModel(fCanvas, fCanvas, kButton1Down);
      return;
   }
 
   if (obj == fModel) {
      // printf("TGedEditor::RecursiveRemove: %s - model deleted.\n", locglob);
      SetModel(fPad, fPad, kButton1Down);
      return;
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Searches for GedFrames for given class. In recursive mode look for class
/// editor in its list of bases.
 
void TGedEditor::ActivateEditor(TClass* cl, Bool_t recurse)
{
   TPair     *pair = (TPair*) fFrameMap.FindObject(cl);
   TClass    *edClass = 0;
   TGedFrame *frame = 0;
 
   if (pair == 0) {
      edClass = TClass::GetClass(Form("%sEditor", cl->GetName()));
 
      if (edClass && edClass->InheritsFrom(TGedFrame::Class())) {
         TGWindow *exroot = (TGWindow*) fClient->GetRoot();
         fClient->SetRoot(fTabContainer);
         fgFrameCreator = this;
         frame = reinterpret_cast<TGedFrame*>(edClass->New());
         frame->SetModelClass(cl);
         fgFrameCreator = 0;
         fClient->SetRoot(exroot);
      }
      fFrameMap.Add(cl, frame);
   } else {
      frame =  (TGedFrame*)pair->Value();
   }
 
   Bool_t exclfr    = kFALSE;
   Bool_t exclbases = kFALSE;
 
   if (frame) {
      TPair* exclpair = (TPair*) fExclMap.FindObject(cl);
      if (exclpair) {
         exclfr = kTRUE;
         exclbases = (exclpair->Value() != 0);
      }
 
      if (!exclfr && frame->AcceptModel(fModel)){
         // handle extra tabs in the gedframe
         if (frame->GetExtraTabs()) {
            TIter next(frame->GetExtraTabs());
            TGedFrame::TGedSubFrame* subf;
            while ((subf = (TGedFrame::TGedSubFrame*)next())) {
               // locate the composite frame on created tabs
               TGedTabInfo* ti = GetEditorTabInfo(subf->fName);
               ti->fContainer->AddFrame(subf->fFrame, new TGLayoutHints(kLHintsNormal | kLHintsExpandX));
               if (fVisibleTabs.FindObject(ti) == 0)
                  fVisibleTabs.Add(ti);
            }
         }
         InsertGedFrame(frame);
      }
   }
 
   if (recurse && !exclbases) {
      if (frame)
         frame->ActivateBaseClassEditors(cl);
      else
         ActivateEditors(cl->GetListOfBases(), recurse);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Searches GedFrames for classes in the given list.
 
void TGedEditor::ActivateEditors(TList* bcl, Bool_t recurse)
{
   TBaseClass *base;
   TIter next(bcl);
 
   while ((base = (TBaseClass*) next())) {
      ActivateEditor(base->GetClassPointer(), recurse);
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Exclude editor for class cl from current construction.
/// If recurse is true the base-class editors of cl are also excluded.
 
void  TGedEditor::ExcludeClassEditor(TClass* cl, Bool_t recurse)
{
   TPair* pair = (TPair*) fExclMap.FindObject(cl);
   if (pair) {
      if (recurse && pair->Value() == 0)
         pair->SetValue((TObject*)(Longptr_t)1); // hack, reuse TObject as Bool_t
   } else {
      fExclMap.Add(cl, (TObject*)(Longptr_t)(recurse ? 1 : 0));
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Insert GedFrame in fGedFrames list according to priorities.
 
void TGedEditor::InsertGedFrame(TGedFrame* f)
{
   // printf("%s %s  insert gedframe %s \n", fModel->GetName(), fModel->IsA()->GetName(),f->GetModelClass()->GetName());
   TObjLink* lnk = fGedFrames.FirstLink();
   if (lnk == 0) {
      fGedFrames.Add(f);
      return;
   }
   TGedFrame* cf;
   while (lnk) {
      cf = (TGedFrame*) lnk->GetObject();
      if (f->GetPriority() < cf->GetPriority()) {
         fGedFrames.AddBefore(lnk, f);
         return;
      }
      lnk = lnk->Next();
   }
   fGedFrames.Add(f);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Call SetModel in class editors.
 
void TGedEditor::ConfigureGedFrames(Bool_t objChanged)
{
   TGFrameElement *el;
 
   // Call SetModel on TGedNameFrames (first in the container list)
   // and map extra-tabs.
   TIter vistabs(&fVisibleTabs);
   vistabs(); // skip Style tab
   TGedTabInfo* ti;
   while ((ti = (TGedTabInfo *) vistabs())) {
      TIter fr(ti->fContainer->GetList());
      el = (TGFrameElement*) fr();
      if (el) {
         ((TGedFrame*) el->fFrame)->SetModel(fModel);
         if (objChanged) {
            do {
               el->fFrame->MapSubwindows();
               el->fFrame->Layout();
               el->fFrame->MapWindow();
            } while((el = (TGFrameElement *) fr()));
         }
      }
      ti->fContainer->Layout();
   }
 
   TIter next(fTabContainer->GetList());
   while ((el = (TGFrameElement *) next())) {
      if ((el->fFrame)->InheritsFrom(TGedFrame::Class())) {
         if (objChanged) {
            el->fFrame->MapSubwindows();
            ((TGedFrame *)(el->fFrame))->SetModel(fModel);
            el->fFrame->Layout();
            el->fFrame->MapWindow();
         } else {
            ((TGedFrame *)(el->fFrame))->SetModel(fModel);
         }
      }
   }
   fTabContainer->Layout();
}
 
////////////////////////////////////////////////////////////////////////////////
/// Virtual function for creation of top name-frame in each tab.
 
TGedFrame* TGedEditor::CreateNameFrame(const TGWindow* parent, const char* /*tab_name*/)
{
   return new TGedNameFrame(parent);
}
 
////////////////////////////////////////////////////////////////////////////////
/// Print contents of fFrameMap.
 
void TGedEditor::PrintFrameStat()
{
   printf("TGedEditor::PrintFrameStat()\n");
   Int_t sum = 0;
   TIter next(fFrameMap.GetTable());
   TPair* pair;
   while ((pair = (TPair*) next())) {
      if (pair->Value() != 0) {
         TClass* cl  = (TClass*) pair->Key();
         printf("TGedFrame created for %s \n", cl->GetName());
         sum ++;
      }
   }
   printf("SUMMARY: %d editors stored in the local map.\n", sum);
}