- TImage, TASImage
 o Change return type of Vectorize method  from "void" to "Double_t*".
 o Implement FromWindow method under X11. This method allows to
   create "snapshot image" from any ROOT window or frame.

- config/Makefile.depend
 Add dependency of libGuiBld lib on libGraf.
 GuiBuilder uses internally TImage/TASImage class.

- GX11Gui.cxx

 X11 error handler was slightly modified.
 Many X11 errors lead to freezing X11 server and
 did not allow debugging.
 To prevent freezing, a "forced seg.violation" was added
 to the error handler.

 The usage of the new "feature" is the following:
 0. run "gdb root.exe"
 1. set "gDebug = (int)gVirtualX" - that activates the new error handling.
 2. run application which has X11 errors.

On X11 error the application was stopped by the "forced seg.violation".

 3. "gdb>bt" - backtrace the problem.



!!! A big list of changes in libGui initiated by gui builder development !!!

- TGButton.h, TGButton.cxx
  TGButton class:
   o SetDown methods removed from context menu.
   o SetEnabled method of context menu changed to TOGGLE.
     Setting fWidgetFlags was added.

- TGTextButton class
   o GetNormGC(), GetFontStruct() methods are introduced.
   o SetFont removed from context menu.
   o ChangeText(const char *title) was introduced and added to context menu.
   o fixed an error in SetFont method which set font globally instead of
     locally.
   o SavePrimitive - save text justification

- TGPictureButton
   o added getter method GetDisabledPicture()

- TGCanvas
   o added to GuiBuilder widgets palette.

- TGColorDialog
   o new methods:
     - TGColorPalette *GetPalette(),
     - TGColorPalette *GetCustomPalette(),
     - void SetCurrentColor(Pixel_t col)
   o new signal:
      - void ColorSelected(Pixel_t)
   o new parameter added to contructor "Bool_t wait".
     If "wait" is kTRUE, "gClient->WaitForUnmap" is called internally
     (normal/old usage). If "wait" is kFALSE - "gClient->WaitForUnmap"
     should be called by user.
   o few "usefull" colors added to "custom" palette.

- TGColorSelect
   o added to GuiBuilder widgets palette.

- TGComboBox
   o new methods:
     - SortByName - allows to sort combobox entries by names.
     - SetEnabled, IsEnabled.

- TGFontDialog was rewritten.
   o Previous version worked under win32 only,
      now it works on X11 also.
      It allows to select any font available on the system.

  o new parameter added to contructor "Bool_t wait".
     If "wait" is kTRUE, "gClient->WaitForUnmap" is called internally
     (normal/old usage). If "wait" is kFALSE - "gClient->WaitForUnmap"
     should be called by user.

  o new methods:
      void SetFont(TGFont *font);
      void SetColor(Pixel_t color);
      void SetAlign(Int_t align);
      void EnableAlign(Bool_t on = kTRUE);
      void UpdateStyleSize(const char *family);

 o new signals:
   - FontSelected(char *font)
   - AlignSelected(Int_t a)
   - ColorSelected(Pixel_t c)

- TGFrame
   o unused static member fgContextMenu removed.

- TGCompositeFrame
   o TGCompositeFrame::SetEditDisabled modified. It is used for setting
     fEditDisableXX attribute during gui buildind.

   o ChangeSubframesBackground helper method was introduced.

- TGGroupFrame
   o SetTextFont, SetTextColor methods were corrected for
     "local" changing of the font.

- TGWindow
   o kEditDisableKeyEnable added to EEditMode enum.
     If this flag is set - window can handle keyboard events during gui
     building.

- TGLabel
   o new methods:
    - GetNormGC, GetFontStruct
   o fixed bugs in setting label's "local" text font.
   o SavePrimitive - saving text justification added.

- TGListBox
  o new methods:
     - SortByName - allow to sort listbox entries by names.
     - new auxilary/internal class TGLBFrameElement created.
        It's used for ascending/descending sort of list box entries.

  o reimplemented methods:
   ChangeBackground, Layout, GetDefaultWidth

  o disable changing layout manager in SetLayoutManager method.
    Layout manager is not used for layout of list box.

- TGIcon
   o SetImagePath method was corrected.

- TGScrollBarElement
   o new methods:
     - SetEnabled, IsEnabled. These methods are used in enabling/disabling
       TGNumberEntry objects.

- TGScrollBar
   o new getter methods:
      - GetHead, GetTail, GetSlider
   o new signals:
      - PositionChanged, RangeChanged, PageSizeChanged
   o ChangeBackground was reimplemented.

- TGShutter
   o new methods:
      - AddPage, RemovePage, RenamePage
   o new signal Selected.
   o disable changing layout manager in SetLayoutManager method.
     Layout manager is not used for layout.

- TGView
   o disable changing layout manager by SetLayoutManager method.
     Layout manager is not used for layout.
   o ChangeBackground(Pixel_t col) method added which changes background
     color only of the canvas frame.

- TGNumberEntry
   o more options added to context menu.

- TGProgressBar
   o new getter/setter methods:
    - GetBarColor, GetNormGC, GetFontStruct, SetForegroundColor.

- TGTab
   o disable SetEditDisabled method to avoid changing "edit disable
     attribute".

- TGTextEdit, TGTextView, TGView
   o fixed bug - "character replace" mode didn't work
   o setting insert mode added to context menu.
   o setting "read only" mode added to context menu.
   o new method which enable/disable "popup menu for edit actions" added.
   o few corrections to SavePrimitive method.

- TGTextEntry
   o guibuilder specific code was removed.

-  TGuiBuilder.h, TGuiBldAction
   o possibility to set picture for context menu entry added.

- treeviewer/inc/TSessionViewer.h
  o forward declaration of TContextMenu class added.


git-svn-id: http://root.cern.ch/svn/root/trunk@15191 27541ba8-7e3a-0410-8455-c3a389f83636