From: Michael Slater <slater@...>
Date: 2003-08-31T20:40:10+09:00
Subject: Re: FXRuby and clipboard contents

> >    text = FXfoobarWindowsStuff.clipboard.get      # or whatever
> >    FXfoobarWindowsStuff.clipboard.copy("Hello!")  # "Hello!" into clipbd
> >
> Yep, that's exactly what I'd like to do.

To roll your own Ruby extension in C --

If you are just talking about cut and pasting "plain text" (i.e. Windows
clipboard format CF_TEXT), then it should be relatively straightforward. 

To get data, you'll need some low-level code to open the clipboard, get the
handle to the clipboard data you want in the format you want, copy the data
as a string, unlock the handle, and close the clipboard. The FOX C++ source
code will show you the basic game plan.

In the FOX world --

In the underlying FOX C++ code, there are the below FXApp methods:

clipboardSetData
clipboardGetData
clipboardGetTypes

For example, from fxpriv.cpp --

void FXApp::clipboardGetData(const FXWindow* window,FXDragType
type,FXuchar*& data,FXuint& size){
  data=NULL;
  size=0;
  if(IsClipboardFormatAvailable(type)){
    if(OpenClipboard((HWND)window->id())){
      HANDLE hClipMemory=GetClipboardData(type);
      if(hClipMemory){
        size=(FXuint)GlobalSize(hClipMemory);
        if(FXMALLOC(&data,FXuchar,size)){
          void *pClipMemory=GlobalLock(hClipMemory);
          FXASSERT(pClipMemory);
          memcpy((void*)data,pClipMemory,size);
          GlobalUnlock(hClipMemory);
          CloseClipboard();
          FXTRACE((100,"Window %d requested CLIPBOARD DATA of type %d from
remote; got %d bytes\n",window->id(),type,size));
          }
        }
      }
    }
  }

In the FXRuby world --

Reading the online API documentation (www.fxruby.org), it looks like
FXRuby's implementation of FXApp doesn't include the clipboard methods from
FOX C++. 

In the FXRuby distribution, the textedit.rb sample does support Copy and
Paste, both to and from the Windows clipboard. So there definitely is some
sort of FXText-based (and possibly FXWindow-based) cut/copy/paste clipboard
support in the current FXRuby. I'd look into the methods onClipboardRequest,
onClipboardGained, and onClipboardLost (and what events they are associated
with) to gain further understanding. The methods are referenced in the SWIG
wrapper FXText.i and FXWindow.i.
 
Lyle Johnson of FXRuby (a rather amazing effort, by the way) would be the
one to talk to about getting the proper methods and other little pieces you
need added from the base FOX toolkit into FXRuby. I'm afraid I can't help
much as I'm already lost in the jungle of SWIGly code ;-)

--ms