some gtk2 code

I'm on holiday this week, but might grab my linux machine from the office if I get bored as I'd like to help with the canvas implementation.

Hopefully you won't need ANY opengl on your end as AttachGraphics takes an xwindow handle and flags, this is the relevant code from fltkgadget, hopefully you can create a panel with it's own xwindow and be away.

' canvas
	
	Field	driver$
	Field	canvas:TGraphics
	Field	canvasflags
	
	Method AttachGraphics:TGraphics( flags )
			canvasflags=flags
	End Method
	
	Method CanvasGraphics:TGraphics()
		If Not canvas
			canvas=brl.graphics.AttachGraphics( flCanvasWindow(flhandle),canvasflags )
		EndIf
		Return canvas
	End Method

fltk needed some nasty cludging to get a colormap/visual combo which I think had to be shared by all contexts, but i think you will be fine ignoring that.

	XVisualInfo *visual;
	Colormap colormap;	

public:

	Fl_Canvas(int x,int y,int w,int h,const char *title):Fl_Window(x,y,w,h,title) {
		enabled=1;mode=0;visual=0;
	}

	void setenabled(int yesno) {
		enabled=yesno;
	}

	void setmode(int gfxmode) {
		mode=gfxmode;
	}

	void show() {	
		if (window() && window()->shown()==0) return;	//parent is hidden so must defer
		if (shown()) {Fl_Window::show(); return;}  // you must do this!
//		static XVisualInfo *visual;
//		static Colormap colormap;	
		if (!visual)
		{
//			visual=glXChooseVisual(fl_display,fl_screen,glspec2);
			visual=_chooseXVisual(mode);
			colormap=XCreateColormap(fl_display,RootWindow(fl_display,fl_screen),visual->visual,AllocNone);
		}
		Fl_X::make_xid(this,visual,colormap);	
	}

ps I found hidegadget more troublesome to implement than freegadget