    // @(#)root/gui:$Name:  $:$Id: TGMdiMainFrame.cxx,v 1.16 2005/01/12 18:39:29 brun Exp $
    // Author: Bertrand Bellenot   20/08/2004

    /*************************************************************************
     * Copyright (C) 1995-2004, Rene Brun and Fons Rademakers.               *
     * All rights reserved.                                                  *
     *                                                                       *
     * For the licensing terms see $ROOTSYS/LICENSE.                         *
     * For the list of contributors see $ROOTSYS/README/CREDITS.             *
     *************************************************************************/

    /**************************************************************************

        This file is part of TGMdi an extension to the xclass toolkit.
        Copyright (C) 1998-2002 by Harald Radke, Hector Peraza.

        This application is free software; you can redistribute it and/or
        modify it under the terms of the GNU Library General Public
        License as published by the Free Software Foundation; either
        version 2 of the License, or (at your option) any later version.

        This application is distributed in the hope that it will be useful,
        but WITHOUT ANY WARRANTY; without even the implied warranty of
        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        Library General Public License for more details.

        You should have received a copy of the GNU Library General Public
        License along with this library; if not, write to the Free
        Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    **************************************************************************/

    //////////////////////////////////////////////////////////////////////////
    //                                                                      //
    // TGMdiMainFrame.                                                      //
    //                                                                      //
    // This file contains the TGMdiMainFrame class.                         //
    //                                                                      //
    //////////////////////////////////////////////////////////////////////////

    #include "KeySymbols.h"
    #include "TGFrame.h"
    #include "TGMdiMainFrame.h"
    #include "TGMdiDecorFrame.h"
    #include "TGMdiFrame.h"
    #include "TGMdiMenu.h"
    #include "TGGC.h"
    #include "TGResourcePool.h"
    #include "Riostream.h"

    ClassImp(TGMdiMainFrame)
    ClassImp(TGMdiContainer)
    ClassImp(TGMdiGeometry)
    ClassImp(TGMdiFrameList)

    //______________________________________________________________________________
    TGMdiMainFrame::TGMdiMainFrame(const TGWindow *p, TGMdiMenuBar *menuBar,
                                   Int_t w, Int_t h, UInt_t options,
                                   Pixel_t back) :
       TGCanvas(p, w, h, options | kDoubleBorder | kSunkenFrame | kMdiMainFrame, back)
    {
       // Create a MDI main frame.

       fContainer = new TGMdiContainer(this, 10, 10, kOwnBackground,
                             fClient->GetShadow(GetDefaultFrameBackground()));
       TGCanvas::SetContainer(fContainer);

       fNumberOfFrames = 0;
       fMenuBar = menuBar;
       fChildren = 0;
       fCurrent = 0;
       fArrangementMode = 0;

       const TGResourcePool *res = GetResourcePool();
       fBackCurrent = res->GetSelectedBgndColor();
       fForeCurrent = res->GetSelectedFgndColor();
       fForeNotCurrent = res->GetFrameBgndColor();
       fBackNotCurrent = res->GetFrameShadowColor();
       fFontCurrent = (TGFont *)res->GetMenuFont();
       fFontNotCurrent = fFontCurrent;

       fBoxGC = new TGGC(*gClient->GetResourcePool()->GetFrameGC());
       fBoxGC->SetForeground(fForeNotCurrent);
       fBoxGC->SetBackground(fBackNotCurrent);
       fBoxGC->SetFunction(kGXxor);
       fBoxGC->SetLineWidth(TGMdiDecorFrame::kMdiBorderWidth-3);
       fBoxGC->SetSubwindowMode(kIncludeInferiors);
       fBoxGC->SetStipple(fClient->GetResourcePool()->GetCheckeredBitmap());
       fBoxGC->SetFillStyle(kFillOpaqueStippled);

       fCurrentX = fCurrentY = 0;
       fResizeMode = kMdiDefaultResizeMode;

       fWinListMenu = new TGPopupMenu(fClient->GetDefaultRoot());

       const TGMainFrame *main = (TGMainFrame *) GetMainFrame();
       if (main){
          Int_t keycode = gVirtualX->KeysymToKeycode(kKey_Tab);
          main->BindKey(this, keycode, kKeyControlMask);
          main->BindKey(this, keycode, kKeyControlMask | kKeyShiftMask);
          keycode = gVirtualX->KeysymToKeycode(kKey_F4);
          main->BindKey(this, keycode, kKeyControlMask);
       }

       MapSubwindows();
       Layout();
       MapWindow();
       SetWindowName();
    }

    //______________________________________________________________________________
    TGMdiMainFrame::~TGMdiMainFrame()
    {
       TGMdiFrameList *tmp, *travel = fChildren;

       while (travel) {
          tmp = travel->GetNext();
          delete travel;
          travel = tmp;
       }

       if (fFontCurrent) fClient->FreeFont((TGFont *)fFontCurrent);
       if (fFontNotCurrent != fFontCurrent) fClient->FreeFont((TGFont *)fFontNotCurrent);

       delete fBoxGC;

       if (!MustCleanup()) {

          const TGMainFrame *main = (TGMainFrame *) GetMainFrame();

          if (main) {
             Int_t keycode = gVirtualX->KeysymToKeycode(kKey_Tab);
             main->RemoveBind(this, keycode, kKeyControlMask);
             main->RemoveBind(this, keycode, kKeyControlMask | kKeyShiftMask);
             keycode = gVirtualX->KeysymToKeycode(kKey_F4);
             main->RemoveBind(this, keycode, kKeyControlMask);
          }
       }
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::SetResizeMode(Int_t mode)
    {
       TGMdiFrameList *travel;

       fResizeMode = mode;
       for (travel = fChildren; travel; travel = travel->GetNext()) {
          travel->GetDecorFrame()->SetResizeMode(mode);
       }
    }

    //______________________________________________________________________________
    Bool_t TGMdiMainFrame::HandleKey(Event_t *event)
    {
       char   input[10];
       UInt_t keysym;

       if (event->fType == kGKeyPress) {
          gVirtualX->LookupString(event, input, sizeof(input), keysym);
          if ((EKeySym)keysym == kKey_Tab) {
             if (event->fState & kKeyControlMask) {
                if (event->fState & kKeyShiftMask) {
                   CirculateUp();
                } else {
                   CirculateDown();
                }
                return kTRUE;
             }
          } else if ((EKeySym)keysym == kKey_F4) {
             if (event->fState & kKeyControlMask) {
                Close(GetCurrent());
                return kTRUE;
             }
          }
       }
       return kFALSE;
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::AddMdiFrame(TGMdiFrame *frame)
    {
       TGMdiFrameList *travel;

       frame->UnmapWindow();

       travel = new TGMdiFrameList;
       travel->SetCyclePrev(travel);
       travel->SetCycleNext(travel);
       travel->SetPrev(0);
       if (fChildren) fChildren->SetPrev(travel);
       travel->SetNext(fChildren);
       fChildren = travel;

       travel->SetDecorFrame(new TGMdiDecorFrame(this, frame, frame->GetWidth(),
                                           frame->GetHeight(), fBoxGC));

       travel->SetFrameId(frame->GetId());
       travel->GetDecorFrame()->SetResizeMode(fResizeMode);

       if (fCurrentX + travel->GetDecorFrame()->GetWidth() > fWidth) fCurrentX = 0;
       if (fCurrentY + travel->GetDecorFrame()->GetHeight() > fHeight) fCurrentY = 0;
       travel->GetDecorFrame()->Move(fCurrentX, fCurrentY);

       fCurrentX += travel->GetDecorFrame()->GetTitleBar()->GetHeight() + fBorderWidth * 2;
       fCurrentY += travel->GetDecorFrame()->GetTitleBar()->GetHeight() + fBorderWidth * 2;

       fNumberOfFrames++;

       UpdateWinListMenu();
       SetCurrent(travel);
       Layout();

       SendMessage(fParent, MK_MSG(kC_MDI, kMDI_CREATE), travel->GetDecorFrame()->GetId(), 0);
       FrameCreated(travel->GetDecorFrame()->GetId());
    }

    //______________________________________________________________________________
    Bool_t TGMdiMainFrame::RemoveMdiFrame(TGMdiFrame *frame)
    {
       TGMdiFrameList *travel = fChildren;

       if (frame && frame->IsEditable()) frame->SetEditable(kFALSE);

       while (travel && (travel->GetFrameId() != frame->GetId()))
          travel = travel->GetNext();
       if (!travel) return kFALSE;

       if (travel == fCurrent) fCurrent = 0;

       // unlink the element from the fCycle list
       travel->GetCyclePrev()->SetCycleNext(travel->GetCycleNext());
       travel->GetCycleNext()->SetCyclePrev(travel->GetCyclePrev());

       // and from the main list
       if (travel->GetNext()) {
          travel->GetNext()->SetPrev(travel->GetPrev());
       }
       if (travel->GetPrev()) {
          travel->GetPrev()->SetNext(travel->GetNext());
       } else {
          fChildren = travel->GetNext();
       }

       if (!fCurrent) {
          if (fChildren) SetCurrent(travel->GetCyclePrev());
       }

       travel->GetDecorFrame()->RemoveFrame(frame);

       UInt_t old_id = frame->GetId();

       delete travel->fDecor;

       fNumberOfFrames--;

       UpdateWinListMenu();
       Layout();

       SendMessage(fParent, MK_MSG(kC_MDI, kMDI_CLOSE), old_id, 0);
       FrameClosed(old_id);

       return kTRUE;
    }

    //______________________________________________________________________________
    Bool_t TGMdiMainFrame::SetCurrent(UInt_t id)
    {
       if (fCurrent && (fCurrent->GetDecorFrame()->GetId() == id)) {
          fCurrent->GetDecorFrame()->RaiseWindow();
          Emit("SetCurrent(TGMdiFrame*)", (long)fCurrent->GetDecorFrame()->GetMdiFrame());
          return kTRUE;
       }

       TGMdiFrameList *travel = fChildren;
       while (travel && (travel->GetDecorFrame()->GetId() != id)) travel = travel->GetNext();
       if (!travel) return kFALSE;

       return SetCurrent(travel);
    }

    //______________________________________________________________________________
    Bool_t TGMdiMainFrame::SetCurrent(TGMdiFrame *f)
    {
       if (fCurrent && (fCurrent->GetDecorFrame()->GetMdiFrame() == f)) {
          fCurrent->GetDecorFrame()->RaiseWindow();
          Emit("SetCurrent(TGMdiFrame*)", (long)fCurrent->GetDecorFrame()->GetMdiFrame());
          return kTRUE;
       }

       TGMdiFrameList *travel = fChildren;
       while (travel && (travel->GetDecorFrame()->GetMdiFrame() != f)) travel = travel->GetNext();
       if (!travel) return kFALSE;

       return SetCurrent(travel);
    }

    //______________________________________________________________________________
    Bool_t TGMdiMainFrame::SetCurrent(TGMdiFrameList *newcurrent)
    {
       if (fCurrent && (fCurrent == newcurrent)) {
          fCurrent->GetDecorFrame()->RaiseWindow();
          Emit("SetCurrent(TGMdiFrame*)", (long)fCurrent->GetDecorFrame()->GetMdiFrame());
          return kTRUE;
       }

       if (fCurrent) {
          if (!fCurrent->GetDecorFrame()->IsMaximized())
             fCurrent->GetDecorFrame()->GetTitleBar()->SetTitleBarColors(fForeNotCurrent,
                                                            fBackNotCurrent,
                                                            fFontNotCurrent);
       }

       if (newcurrent) {
          if (fCurrent) {
             // unlink the element from the old position
             newcurrent->GetCyclePrev()->SetCycleNext(newcurrent->GetCycleNext());
             newcurrent->GetCycleNext()->SetCyclePrev(newcurrent->GetCyclePrev());
             // and link it to the top of the window fCycle stack
             newcurrent->SetCyclePrev(fCurrent);
             newcurrent->SetCycleNext(fCurrent->GetCycleNext());
             fCurrent->SetCycleNext(newcurrent);
             newcurrent->GetCycleNext()->SetCyclePrev(newcurrent);
          } else {
             // no current? well, put it at the head of the list...
             if (fChildren && newcurrent != fChildren) {
                // unlink the element from the old position
                newcurrent->GetCyclePrev()->SetCycleNext(newcurrent->GetCycleNext());
                newcurrent->GetCycleNext()->SetCyclePrev(newcurrent->GetCyclePrev());
                // and link it to the beginning of the window list
                newcurrent->SetCyclePrev(fChildren);
                newcurrent->SetCycleNext(fChildren->GetCycleNext());
                fChildren->SetCycleNext(newcurrent);
                newcurrent->GetCycleNext()->SetCyclePrev(newcurrent);
             }
          }
       }

       fCurrent = newcurrent;

       if (fCurrent) {
          if (!fCurrent->GetDecorFrame()->IsMaximized())
             fCurrent->GetDecorFrame()->GetTitleBar()->SetTitleBarColors(fForeCurrent,
                                                            fBackCurrent,
                                                            fFontCurrent);
       }

       fCurrent->GetDecorFrame()->RaiseWindow();
       Emit("SetCurrent(TGMdiFrame*)", (long)fCurrent->GetDecorFrame()->GetMdiFrame());

       fWinListMenu->RCheckEntry(fCurrent->GetDecorFrame()->GetId(), 0, kMaxInt);

       return kTRUE;
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::CirculateUp()
    {
       // Bring the lowest window to the top.

       if (fCurrent) {
          fCurrent->GetDecorFrame()->GetTitleBar()->SetTitleBarColors(fForeNotCurrent,
                                                         fBackNotCurrent,
                                                         fFontNotCurrent);

          fCurrent = fCurrent->GetCycleNext();

          fCurrent->GetDecorFrame()->RaiseWindow();
          fCurrent->GetDecorFrame()->GetTitleBar()->SetTitleBarColors(fForeCurrent,
                                                         fBackCurrent,
                                                         fFontCurrent);

       } else if (fChildren) {
          SetCurrent(fChildren);
       }
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::CirculateDown()
    {
       // Send the highest window to the bottom.

       if (fCurrent) {
          fCurrent->GetDecorFrame()->LowerWindow();
          fCurrent->GetDecorFrame()->GetTitleBar()->SetTitleBarColors(fForeNotCurrent,
                                                         fBackNotCurrent,
                                                         fFontNotCurrent);

          fCurrent = fCurrent->GetCyclePrev();   // do not call SetCurrent in order
                                             // to not to alter the stacking order
          fCurrent->GetDecorFrame()->RaiseWindow();
          fCurrent->GetDecorFrame()->GetTitleBar()->SetTitleBarColors(fForeCurrent,
                                                         fBackCurrent,
                                                         fFontCurrent);

       } else if (fChildren) {
          SetCurrent(fChildren);
       }
    }

    //______________________________________________________________________________
    TGMdiDecorFrame *TGMdiMainFrame::GetDecorFrame(TGMdiFrame *frame) const
    {
       TGMdiFrameList *travel = fChildren;
       while (travel && (travel->GetDecorFrame()->GetMdiFrame() != frame))
          travel = travel->GetNext();
       if (!travel) return 0;
       return travel->GetDecorFrame();
    }

    //______________________________________________________________________________
    TGMdiDecorFrame *TGMdiMainFrame::GetDecorFrame(UInt_t id) const
    {
       TGMdiFrameList *travel = fChildren;
       while (travel && (travel->GetDecorFrame()->GetId() != id)) travel = travel->GetNext();
       if (!travel) return 0;
       return travel->GetDecorFrame();
    }

    //______________________________________________________________________________
    TGMdiFrame *TGMdiMainFrame::GetMdiFrame(UInt_t id) const
    {
       TGMdiDecorFrame *frame = GetDecorFrame(id);
       if (!frame) return 0;
       return frame->GetMdiFrame();
    }

    //______________________________________________________________________________
    TGRectangle TGMdiMainFrame::GetBBox() const
    {
       if (fCurrent && fCurrent->GetDecorFrame()->IsMaximized()) {
          return TGRectangle(0, 0, fWidth - 2 * fBorderWidth, fHeight - 2 * fBorderWidth);
       } else {
          TGRectangle rect;
          TGMdiFrameList *travel;

          for (travel = fChildren; travel; travel = travel->GetNext()) {
             TGRectangle wrect(travel->GetDecorFrame()->GetX(), travel->GetDecorFrame()->GetY(),
                              travel->GetDecorFrame()->GetWidth(), travel->GetDecorFrame()->GetHeight());
             rect.Merge(wrect);
          }
          return rect;
       }
    }

    //______________________________________________________________________________
    TGRectangle TGMdiMainFrame::GetMinimizedBBox() const
    {
       TGRectangle rect;
       TGMdiFrameList *travel;
       Int_t first = kTRUE;

       for (travel = fChildren; travel; travel = travel->GetNext()) {
          if (travel->GetDecorFrame()->IsMinimized()) {
             TGRectangle wrect(travel->GetDecorFrame()->GetX(), travel->GetDecorFrame()->GetY(),
                               travel->GetDecorFrame()->GetWidth(), travel->GetDecorFrame()->GetHeight());
             if (first) rect = wrect; else rect.Merge(wrect);
             first = kFALSE;
          }
       }
       return rect;
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::UpdateWinListMenu()
    {
       char buf[256], scut;
       TGMdiFrameList *travel;
       const TGPicture *pic;

       TGMenuEntry *e;
       TIter fNext(fWinListMenu->GetListOfEntries());
       while ((e = (TGMenuEntry*)fNext())) {
          fWinListMenu->DeleteEntry(e);
       }
       scut = '0';

       if (!fChildren) {
          fWinListMenu->AddEntry(new TGHotString("(None)"), 1000);
          fWinListMenu->DisableEntry(1000);
          return;
       }

       for (travel = fChildren; travel; travel = travel->GetNext()) {
          scut++;
          if (scut == ('9' + 1)) scut = 'A';
          sprintf(buf, "&%c. %s", scut, travel->GetDecorFrame()->GetWindowName());
          if (travel->GetDecorFrame()->GetMdiButtons() & kMdiMenu)
             pic = travel->GetDecorFrame()->GetWindowIcon();
          else
             pic = 0;
          fWinListMenu->AddEntry(new TGHotString(buf), travel->GetDecorFrame()->GetId(), 0, pic);
       }

       if (fCurrent)
          fWinListMenu->RCheckEntry(fCurrent->GetDecorFrame()->GetId(), 0, kMaxInt);
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::Layout()
    {
       TGCanvas::Layout();
       if (fCurrent && fCurrent->GetDecorFrame()->IsMaximized())
          fCurrent->GetDecorFrame()->MoveResize(0, 0, fWidth - 2 *fBorderWidth, fHeight -
                                       2 * fBorderWidth);
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::ArrangeFrames(Int_t mode)
    {
       Int_t factor_x = 0;
       Int_t factor_y = 0;
       Int_t num_mapped = 0;
       Int_t x = 0;
       Int_t y = 0;
       Int_t w = fWidth - 2 * fBorderWidth;  //GetContainer()->GetWidth();
       Int_t h = fHeight - 2 * fBorderWidth;  //GetContainer()->GetHeight();

       fArrangementMode = mode;

       TGMdiFrameList *tmp, *travel;

       for (travel = fChildren; travel; travel = travel->GetNext()) {
          if (travel->GetDecorFrame()->IsMaximized())
             Restore(travel->GetDecorFrame()->GetMdiFrame());
          if (!travel->GetDecorFrame()->IsMinimized())
             ++num_mapped;
       }

       // must also restore view to 0,0
       GetViewPort()->SetHPos(0);
       GetViewPort()->SetVPos(0);

       ArrangeMinimized();

       travel = fChildren;

       if (num_mapped == 0) return;

       TGRectangle irect = GetMinimizedBBox();
       h -= irect.fH;

       switch (mode) {
          case kMdiTileHorizontal:
             factor_y = h / num_mapped;
             for (travel = fChildren; travel; travel = travel->GetNext()) {
                 if (!travel->GetDecorFrame()->IsMinimized()) {
                    travel->GetDecorFrame()->MoveResize(x, y, w, factor_y);
                    y = y + factor_y;
                 }
             }
             break;

          case kMdiTileVertical:
             factor_x = w / num_mapped;
             for (travel = fChildren; travel; travel = travel->GetNext()) {
                if (!travel->GetDecorFrame()->IsMinimized()) {
                   travel->GetDecorFrame()->MoveResize(x, y, factor_x, h);
                   x = x + factor_x;
                }
             }
             break;

          case kMdiCascade:
             y = travel->GetDecorFrame()->GetTitleBar()->GetX() +
                 travel->GetDecorFrame()->GetTitleBar()->GetHeight();
             x = y;
             factor_y = (h * 2) / 3;
             factor_x = (w * 2) / 3;

             travel = fCurrent;
             if (!travel) travel = fChildren;
             tmp = travel;
             if (travel) {
                do {
                   travel = travel->GetCycleNext();
                   if (!travel->GetDecorFrame()->IsMinimized()) {
                      travel->GetDecorFrame()->MoveResize(x - y, x - y, factor_x, factor_y);
                      x += y;
                   }
                } while (travel != tmp);
             }
             break;
       }

       FramesArranged(mode);

       Layout();
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::ArrangeMinimized()
    {
       // This is an attempt to an "smart" minimized window re-arrangement.

       TGMdiFrameList *travel, *closest;
       Int_t x, y, w, h;

       Bool_t arranged = kTRUE;

       for (travel = fChildren; travel && arranged; travel = travel->GetNext())
          if (travel->GetDecorFrame()->IsMinimized()) arranged = kFALSE;

       // return if there is nothing to do

       if (arranged || !fChildren) return;

       h = fChildren->GetDecorFrame()->GetTitleBar()->GetDefaultHeight() +
           fChildren->GetDecorFrame()->GetBorderWidth();
       w = kMinimizedWidth * h + fChildren->GetDecorFrame()->GetBorderWidth();

       x = 0;
       y = GetViewPort()->GetHeight() - h;

       // we'll use the _minimizedUserPlacement variable as a "not arranged" flag

       for (travel = fChildren; travel; travel = travel->GetNext())
          travel->GetDecorFrame()->SetMinUserPlacement();

       do {
          closest = 0;
          Int_t cdist = 0;
          for (travel = fChildren; travel; travel = travel->GetNext()) {
             if (travel->GetDecorFrame()->IsMinimized()) {
                if (travel->GetDecorFrame()->GetMinUserPlacement()) {
                   Int_t dx = travel->GetDecorFrame()->GetX() - x;
                   Int_t dy = y - travel->GetDecorFrame()->GetY();
                   Int_t dist = dx * dx + dy * dy;
                   if (!closest || (dist < cdist)) {
                      closest = travel;
                      cdist = dist;
                   }
                }
             }
          }

          if (closest) {
             closest->GetDecorFrame()->SetMinimizedX(x);
             closest->GetDecorFrame()->SetMinimizedY(y);
             closest->GetDecorFrame()->MoveResize(x, y, w, h);
             closest->GetDecorFrame()->SetMinUserPlacement(kFALSE);

             x += w;
             if (x + w > (Int_t)GetViewPort()->GetWidth()) {
                x = 0;
                y -= h;
             }
          }

       } while (closest);

       // reset the fMinimizedUserPlacement settings for all windows

       for (travel = fChildren; travel; travel = travel->GetNext())
          travel->GetDecorFrame()->SetMinUserPlacement(kFALSE);
    }

    //______________________________________________________________________________
    Bool_t TGMdiMainFrame::ProcessMessage(Long_t msg, Long_t parm1, Long_t parm2)
    {

       switch (GET_MSG(msg)) {
          case kC_MDI:
             SetCurrent(parm1);
             switch (GET_SUBMSG(msg)) {

                case kMDI_MINIMIZE:
                   Minimize(GetCurrent());
                   break;

                case kMDI_MAXIMIZE:
                   Maximize(GetCurrent());
                   break;

                case kMDI_RESTORE:
                   Restore(GetCurrent());
                   break;

                case kMDI_CLOSE:
                   Close(GetCurrent());
                   break;

                case kMDI_MOVE:
                   FreeMove(GetCurrent());
                   break;

                case kMDI_SIZE:
                   FreeSize(GetCurrent());
                   break;

                case kMDI_HELP:
                   ContextHelp(GetCurrent());
                   break;
             }
             break;

          default:
             return TGCanvas::ProcessMessage(msg, parm1, parm2);
       }

       return kTRUE;
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::Maximize(TGMdiFrame *mdiframe)
    {
       TGMdiDecorFrame *frame = GetDecorFrame(mdiframe);

       if (!frame) return;

       if (frame->IsMaximized()) return;

       if (frame->IsMinimized()) Restore(mdiframe);

       frame->SetDecorBorderWidth(0);
       frame->SetPreResizeX(frame->GetX());
       frame->SetPreResizeY(frame->GetY());
       frame->SetPreResizeWidth(frame->GetWidth());
       frame->SetPreResizeHeight(frame->GetHeight());
       frame->GetUpperHR()->UnmapWindow();
       frame->GetLowerHR()->UnmapWindow();
       frame->GetLeftVR()->UnmapWindow();
       frame->GetRightVR()->UnmapWindow();
       frame->GetUpperLeftCR()->UnmapWindow();
       frame->GetUpperRightCR()->UnmapWindow();
       frame->GetLowerLeftCR()->UnmapWindow();
       frame->GetLowerRightCR()->UnmapWindow();

       frame->MoveResize(fBorderWidth, fBorderWidth, fWidth - 2 *fBorderWidth,
           fHeight - 2 * fBorderWidth);
       frame->Maximize();
       frame->GetTitleBar()->LayoutButtons(frame->GetMdiButtons(), frame->IsMinimized(),
                                       frame->IsMaximized());
       frame->GetTitleBar()->RemoveFrames(frame->GetTitleBar()->GetWinIcon(),
                                      frame->GetTitleBar()->GetButtons());
       frame->HideFrame(frame->GetTitleBar());

       if (fMenuBar) {
          frame->GetTitleBar()->GetWinIcon()->SetBackgroundColor(GetDefaultFrameBackground());
          frame->GetTitleBar()->GetButtons()->SetBackgroundColor(GetDefaultFrameBackground());
          fMenuBar->AddFrames(frame->GetTitleBar()->GetWinIcon(),
                              frame->GetTitleBar()->GetButtons());
          fMenuBar->Layout();
       }

       SendMessage(fParent, MK_MSG(kC_MDI, kMDI_MAXIMIZE), frame->GetId(), 0);
       FrameMaximized(frame->GetId());

       Layout();
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::Restore(TGMdiFrame *mdiframe)
    {
       TGMdiDecorFrame *frame = GetDecorFrame(mdiframe);

       if (!frame) return;

       if (frame->IsMinimized() == kFALSE && frame->IsMaximized() == kFALSE) return;

       if (frame->IsMinimized()) {
          frame->SetMinimizedX(frame->GetX());
          frame->SetMinimizedY(frame->GetY());
          frame->Minimize(kFALSE);
          frame->GetTitleBar()->SetTitleBarColors(fForeCurrent,
                                              fBackCurrent,
                                              fFontCurrent);
       } else if (frame->IsMaximized()) {
          frame->SetDecorBorderWidth(TGMdiDecorFrame::kMdiBorderWidth);
          frame->MapSubwindows();

          if (fMenuBar) {
             fMenuBar->RemoveFrames(frame->GetTitleBar()->GetWinIcon(),
                                    frame->GetTitleBar()->GetButtons());
             fMenuBar->Layout();
          }

          frame->GetTitleBar()->AddFrames(frame->GetTitleBar()->GetWinIcon(),
                                          frame->GetTitleBar()->GetButtons());
          frame->GetTitleBar()->SetTitleBarColors(fForeCurrent, fBackCurrent,
                                                  fFontCurrent);
          frame->ShowFrame(frame->GetTitleBar());
       }
       frame->Minimize(kFALSE);
       frame->Maximize(kFALSE);
       frame->GetTitleBar()->LayoutButtons(frame->GetMdiButtons(), kFALSE, kFALSE);
       frame->MoveResize(frame->GetPreResizeX(), frame->GetPreResizeY(),
                         frame->GetPreResizeWidth(), frame->GetPreResizeHeight());

       SendMessage(fParent, MK_MSG(kC_MDI, kMDI_RESTORE), frame->GetId(), 0);
       FrameRestored(frame->GetId());

       Layout();
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::Minimize(TGMdiFrame *mdiframe)
    {
       Int_t x, y, w, h;
       TGMdiDecorFrame *frame = GetDecorFrame(mdiframe);

       if (!frame) return;

       if (frame->IsMinimized()) return;

       if (frame->IsMaximized()) Restore(mdiframe);

       frame->SetPreResizeX(frame->GetX());
       frame->SetPreResizeY(frame->GetY());
       frame->SetPreResizeWidth(frame->GetWidth());
       frame->SetPreResizeHeight(frame->GetHeight());

       h = frame->GetTitleBar()->GetDefaultHeight() + frame->GetBorderWidth();
       w = kMinimizedWidth * h + frame->GetBorderWidth();

       if (!frame->GetMinUserPlacement()) {

          x = 0;
          y = GetViewPort()->GetHeight() - h;

          while (1) {
             TGMdiFrameList *travel;
             Bool_t taken = kFALSE;

             // find an empty spot...
             for (travel = fChildren; travel; travel = travel->GetNext()) {
                if (travel->GetDecorFrame()->IsMinimized()) {
                   TGPosition p(travel->GetDecorFrame()->GetX(),
                                travel->GetDecorFrame()->GetY());
                   TGDimension s(travel->GetDecorFrame()->GetWidth(),
                                 travel->GetDecorFrame()->GetHeight());
                   if ((x <= p.fX + (Int_t) s.fWidth - 1) && (x + w - 1 >= p.fX) &&
                       (y <= p.fY + (Int_t) s.fHeight - 1) && (y + h - 1 >= p.fY)) {
                      taken = kTRUE;
                      break;
                   }
                }
             }
             if (!taken) break;

             x += w;
             if (x + w > (Int_t)GetViewPort()->GetWidth()) {
                x = 0;
                y -= h;
             }
          }

          frame->SetMinimizedX(x);
          frame->SetMinimizedY(y);
       }

       frame->Minimize();

       frame->MoveResize(frame->GetMinimizedX(), frame->GetMinimizedY(), w, h);
       frame->LowerWindow();
       frame->GetTitleBar()->LayoutButtons(frame->GetMdiButtons(),
                                           frame->IsMinimized(),
                                           frame->IsMaximized());
       frame->Layout();

       SendMessage(fParent, MK_MSG(kC_MDI, kMDI_MINIMIZE), frame->GetId(), 0);
       FrameMinimized(frame->GetId());

       Layout();
    }

    //______________________________________________________________________________
    Int_t TGMdiMainFrame::Close(TGMdiFrame *mdiframe)
    {
       if (!mdiframe) return kFALSE;

       TGMdiDecorFrame *frame = GetDecorFrame(mdiframe);
       Restore(mdiframe);
       mdiframe->Emit("CloseWindow()");
       if (mdiframe->TestBit(kNotDeleted) && !mdiframe->TestBit(TGMdiFrame::kDontCallClose))
          return frame->CloseWindow();
       return kTRUE;
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::FreeMove(TGMdiFrame *mdiframe)
    {
       TGMdiDecorFrame *frame = GetDecorFrame(mdiframe);
       if (!frame) return;

       Int_t x = frame->GetTitleBar()->GetWidth() / 2;
       Int_t y = frame->GetTitleBar()->GetHeight() - 1;// / 2;

       gVirtualX->Warp(x, y, frame->GetTitleBar()->GetId());

       frame->GetTitleBar()->SetLeftButPressed();
       frame->GetTitleBar()->SetX0(x);
       frame->GetTitleBar()->SetY0(y);
       Cursor_t cursor = gVirtualX->CreateCursor(kMove);
       gVirtualX->SetCursor(frame->GetTitleBar()->GetId(), cursor);

       gVirtualX->GrabPointer(frame->GetTitleBar()->GetId(),
                              kButtonReleaseMask | kPointerMotionMask,
                              kNone, cursor, kTRUE, kFALSE);
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::FreeSize(TGMdiFrame *mdiframe)
    {
       TGMdiDecorFrame *frame = GetDecorFrame(mdiframe);
       if (!frame) return;

       Int_t x = frame->GetLowerRightCR()->GetWidth() - 5;
       Int_t y = frame->GetLowerRightCR()->GetHeight() - 5;

       Int_t xroot, yroot;
       Window_t win;

       gVirtualX->TranslateCoordinates(frame->GetLowerRightCR()->GetId(),
                  fClient->GetDefaultRoot()->GetId(), x, y, xroot, yroot, win);

       gVirtualX->Warp(x, y, frame->GetLowerRightCR()->GetId());

       Event_t event;

       event.fType = kButtonPress;
       event.fWindow = frame->GetLowerRightCR()->GetId();
       event.fCode = kButton1;
       event.fX = x;
       event.fY = y;
       event.fXRoot = xroot;
       event.fYRoot = yroot;

       Cursor_t cursor = gVirtualX->CreateCursor(kBottomRight);
       gVirtualX->SetCursor(frame->GetLowerRightCR()->GetId(), cursor);

       gVirtualX->GrabPointer(frame->GetLowerRightCR()->GetId(),
                   kButtonReleaseMask | kPointerMotionMask,
                   kNone, cursor, kTRUE, kFALSE);

       frame->GetLowerRightCR()->HandleButton(&event);
    }

    //______________________________________________________________________________
    Int_t TGMdiMainFrame::ContextHelp(TGMdiFrame *mdiframe)
    {
       if (mdiframe)
          return mdiframe->Help();
       else
          return kFALSE;
    }

    //______________________________________________________________________________
    TGMdiFrame *TGMdiMainFrame::GetCurrent() const
    {
       if (fCurrent)
          return fCurrent->GetDecorFrame()->GetMdiFrame();
       else
          return 0;
    }

    //______________________________________________________________________________
    TGMdiGeometry TGMdiMainFrame::GetWindowGeometry(TGMdiFrame *f) const
    {
       TGMdiGeometry geom;

       geom.fValueMask = 0;

       const TGMdiDecorFrame *frame = GetDecorFrame(f);
       if (frame) {
          Int_t th = frame->GetTitleBar()->GetDefaultHeight();
          Int_t bw = frame->GetBorderWidth();

          if (frame->IsMinimized() || frame->IsMaximized()) {
             geom.fDecoration = TGRectangle(frame->GetPreResizeX(),
                                            frame->GetPreResizeY(),
                                            (unsigned) frame->GetPreResizeWidth(),
                                            (unsigned) frame->GetPreResizeHeight());
          } else {
             geom.fDecoration = TGRectangle(frame->GetX(),
                                            frame->GetY(),
                                            (unsigned) frame->GetWidth(),
                                            (unsigned) frame->GetHeight());
          }
          geom.fValueMask |= kMdiDecorGeometry;

          geom.fClient = TGRectangle(geom.fDecoration.fX + bw,
                                     geom.fDecoration.fY + bw + th,
                                     (unsigned) (geom.fDecoration.fW - 2 * bw),
                                     (unsigned) (geom.fDecoration.fH - 2 * bw - th));
          geom.fValueMask |= kMdiClientGeometry;

          if (frame->GetMinUserPlacement()) {
             Int_t mh = th + 2 * bw;
             Int_t mw = kMinimizedWidth * mh;

             geom.fIcon = TGRectangle(frame->GetMinimizedX(),
                                      frame->GetMinimizedY(),
                                      (unsigned) mw,
                                      (unsigned) mh);
             geom.fValueMask |= kMdiIconGeometry;
          }

       }

       return geom;
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::ConfigureWindow(TGMdiFrame *f, TGMdiGeometry &geom)
    {
       TGMdiDecorFrame *frame = GetDecorFrame(f);
       if (frame) {
          if (geom.fValueMask & kMdiDecorGeometry) {
             if (frame->IsMinimized() || frame->IsMaximized()) {
                frame->SetPreResizeX(geom.fDecoration.fX);
                frame->SetPreResizeY(geom.fDecoration.fY);
                frame->SetPreResizeWidth(geom.fDecoration.fW);
                frame->SetPreResizeHeight(geom.fDecoration.fH);
             } else {
                frame->MoveResize(geom.fDecoration.fX, geom.fDecoration.fY,
                                  geom.fDecoration.fW, geom.fDecoration.fH);
             }
          } else if (geom.fValueMask & kMdiClientGeometry) {

          }
          if (geom.fValueMask & kMdiIconGeometry) {
             frame->SetMinimizedX(geom.fIcon.fX);
             frame->SetMinimizedY(geom.fIcon.fY);
             frame->SetMinUserPlacement();
             if (frame->IsMinimized())
                frame->Move(frame->GetMinimizedX(), frame->GetMinimizedY());
          }
          Layout();
       }
    }

    //_____________________________________________________________________________
    void TGMdiMainFrame::CloseAll()
    {
       // close all mdi frames

       TGMdiFrameList *tmp, *travel = fChildren;
       TGMdiFrame *mdi;

       while (travel) {
          tmp = travel->GetNext();
          mdi = travel->GetDecorFrame()->GetMdiFrame();
          RemoveMdiFrame(mdi);
          travel = tmp;
       }
    }

    //______________________________________________________________________________
    Bool_t TGMdiMainFrame::IsMaximized(TGMdiFrame *f)
    {
       TGMdiDecorFrame *frame = GetDecorFrame(f);
       if (frame) return frame->IsMaximized();
       return kFALSE;
    }

    //______________________________________________________________________________
    Bool_t TGMdiMainFrame::IsMinimized(TGMdiFrame *f)
    {
       TGMdiDecorFrame *frame = GetDecorFrame(f);
       if (frame) return frame->IsMinimized();
       return kFALSE;
    }

    //______________________________________________________________________________
     TGMdiContainer::TGMdiContainer(const TGMdiMainFrame *p, Int_t w, Int_t h,
                                   UInt_t options, ULong_t back) :
      TGFrame(p->GetViewPort(), w, h, options, back)
    {
       fMain = p;
       AddInput(kStructureNotifyMask);
    }

    //______________________________________________________________________________
     TGDimension TGMdiContainer::GetDefaultSize() const
    {
       TGRectangle rect = fMain->GetBBox();

       Int_t xpos = -fMain->GetViewPort()->GetHPos();
       Int_t ypos = -fMain->GetViewPort()->GetVPos();

       return TGDimension(TMath::Max(Int_t(xpos + fWidth), rect.RightBottom().fX + 1),
                          TMath::Max(Int_t(ypos + fHeight), rect.RightBottom().fY + 1));
    }

    //______________________________________________________________________________
     Bool_t TGMdiContainer::HandleConfigureNotify(Event_t *event)
    {
       if (event->fWindow != fId) {
          TGRectangle rect = fMain->GetBBox();

          Int_t vw = fMain->GetViewPort()->GetWidth();
          Int_t vh = fMain->GetViewPort()->GetHeight();

          Int_t w = TMath::Max(vw, rect.RightBottom().fX + 1);
          Int_t h = TMath::Max(vh, rect.RightBottom().fY + 1);

          if ((w != (Int_t)fWidth) || (h != (Int_t)fHeight)) {
             ((TGMainFrame *)fMain)->Layout();
             return kTRUE;
          }
       }
       return kFALSE;
    }

    //______________________________________________________________________________
    void TGMdiMainFrame::SavePrimitive(ofstream &out, Option_t *option)
    {
       // Save a MDI main frame as a C++ statement(s) on output stream out

       if (fBackground != GetDefaultFrameBackground()) SaveUserColor(out, option);

       out << endl << "   // MDI main frame" << endl;
       out << "   TGMdiMainFrame *";
       out << GetName() << " = new TGMdiMainFrame(" << fParent->GetName()
           << "," << GetMenu()->GetName() << "," << GetWidth() << "," << GetHeight();

       if (fBackground == GetDefaultFrameBackground()) {
          if (!GetOptions()) {
             out << ");" << endl;
          } else {
             out << "," << GetOptionString() <<");" << endl;
          }
       } else {
          out << "," << GetOptionString() << ",ucolor);" << endl;
       }

       TGMdiFrameList *travel=fChildren;
       travel->SetCycleNext(travel);
       for (travel = fChildren; travel; travel = travel->GetNext()) {
          TGMdiFrame *mf = travel->GetDecorFrame()->GetMdiFrame();
          if (mf) mf->SavePrimitive(out, option);
       }
       if (fArrangementMode) {
          out << "   " << GetName() << "->ArrangeFrames(";
          switch (fArrangementMode) {

             case kMdiTileHorizontal:
                out << "kMdiTileHorizontal);" << endl;
             break;

             case kMdiTileVertical:
                out << "kMdiTileVertical);" << endl;
             break;

             case kMdiCascade:
                out << "kMdiCascade);" << endl;
             break;
          }
       }
       if (fResizeMode != kMdiOpaque)
          out << "   " << GetName() << "->SetResizeMode(kMdiNonOpaque);" << endl;

       if (fCurrent)
          out << "   " << GetName() << "->SetCurrent(" << GetCurrent()->GetName()
              << ");" << endl;
    }