elrick@physics.utoronto.ca (Bruce Elrick) (07/20/90)
Question: If I open a window using the dos Open() command, how can I find the window structure (for, say, Windowtofront()) from the filehandle?
peterk@cbmger.UUCP (Peter Kittel GERMANY) (07/20/90)
In article <1990Jul19.184648.11351@helios.physics.utoronto.ca> elrick@physics.utoronto.ca (Bruce Elrick) writes: >If I open a window using the dos Open() command, how can I find the >window structure (for, say, Windowtofront()) from the filehandle? I only know a dirty way that won't be totally waterproof: If the window is on Workbench then find Intuitionbase, scan the pointer chain of screens for the Workbench screen and take the pointer chain for windows inside this screen to search for your one. To identify your window you could search for your UNIQUE window title string. And this is already the caveat: You must be ABSOLUTELY sure that no other window on this screen has the same title string. As I said, a rather dirty way. -- Best regards, Dr. Peter Kittel // E-Mail to Commodore Frankfurt, Germany \X/ rutgers!cbmvax!cbmger!peterk
daveh@cbmvax.commodore.com (Dave Haynie) (07/20/90)
In article <1990Jul19.184648.11351@helios.physics.utoronto.ca> elrick@physics.utoronto.ca (Bruce Elrick) writes: > > Question: >If I open a window using the dos Open() command, how can I find the >window structure (for, say, Windowtofront()) from the filehandle? Here's about the best I've done. I don't how you can get a window directly from a filehandle, since a file isn't necessarily associated with any window. However, you can get a window pointer if you know the console associated with that window. Here's an excerpt from SetCPU V2.7 that does this: // ======================================================================= // From SetFont 2.7 - by Dave Haynie #include <exec/types.h> #include <exec/io.h> #include <exec/ports.h> #include <exec/memory.h> #include <graphics/gfxbase.h> #include <graphics/text.h> #include <graphics/rastport.h> #include <libraries/dos.h> #include <libraries/dosextens.h> #include <intuition/intuition.h> #include <string.h> #include <ctype.h> #include <stdio.h> #include <stdlib.h> // ========================================================================= // Miscellaneous stuff. inline MsgPort *contask(MsgPort *port) { return (MsgPort *) ((port->mp_SigTask->ln_Type == NT_PROCESS) ? ((Process *)port->mp_SigTask)->pr_ConsoleTask : NULL); } // ========================================================================= // These classes manage the places that fonts are hidden. // This is the basic place node class PlaceNode : public Node { private: static Window *pwin; static Screen *pscr; public: PlaceNode(); PlaceNode *next() { return (PlaceNode *)Node::next(); } void testwindow() { if (!pwin) fail("Window not found\n"); } void testscreen() { if (!pscr) fail("Screen not found\n"); } Window *window() { return pwin; } Screen *screen() { return pscr; } virtual void set(SmartFont *f) { testwindow(); SetFont(window()->graphic(),f->font()); printf("\033c"); // Re-init window's conunit (void)flushall(); } }; // Initialize the static stuff, once. PlaceNode::PlaceNode() { if (pwin) return; StandardPacket *packet = new StandardPacket; InfoData *info = new InfoData; MsgPort *port = new StdPort; // Find the window if (contask(port)) { packet->sendio(contask(port),port,ACTION_DISK_INFO,CADDR(info)); (void)port->wait(); pwin = (Window *)info->id_VolumeNode; } else pwin = NULL; delete port; delete info; delete packet; // Find the screen pscr = (pwin) ? pwin->screen() : NULL; } Or, in english, if you send the ACTION_DISK_INFO packet to a console, the console's window is returned as the id_VolumeNode field of the InfoData structure. You can't the console task from a FileHandle, but you can get it from a FileLock. Note that the Lock() function returns a BPTR to a FileLock, so you'll have to convert this into a 680x0 pointer before examining the fields. -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy "I have been given the freedom to do as I see fit" -REM
deven@rpi.edu (Deven T. Corzine) (07/20/90)
In article <1990Jul19.184648.11351@helios.physics.utoronto.ca> elrick@physics.utoronto.ca (Bruce Elrick) writes: Bruce> If I open a window using the dos Open() command, how can I find the Bruce> window structure (for, say, Windowtofront()) from the filehandle? On 20 Jul 90 07:18:22 GMT, peterk@cbmger.UUCP (Peter Kittel GERMANY) said: Peter> I only know a dirty way that won't be totally waterproof: If Peter> the window is on Workbench then find Intuitionbase, scan the Peter> pointer chain of screens for the Workbench screen and take the Peter> pointer chain for windows inside this screen to search for your Peter> one. To identify your window you could search for your UNIQUE Peter> window title string. And this is already the caveat: You must Peter> be ABSOLUTELY sure that no other window on this screen has the Peter> same title string. As I said, a rather dirty way. You're right, that is a rather dirty way. There is, however, a better way. You can send an ACTION_DISK_INFO packet to the CON: handler and it will return the address of the window in the Info structure. Here's a routine which will return a Window pointer to the current "console" window the one referred to by "*": -------- /* findwindow.c - utility routine to find window of a CLI. */ #include <exec/types.h> #include <exec/memory.h> #include <proto/exec.h> #include <proto/dos.h> struct Window __regargs *FindWindow() { register struct DosLibrary *DOSBase; register struct Window *win; register struct Process *proc; register struct CommandLineInterface *cli; register struct InfoData *id; register struct StandardPacket *pkt; register struct FileHandle *fh; register BPTR file; register long ret1,ret2; if (DOSBase=(struct DosLibrary *) OpenLibrary(DOSNAME,0)) { if (id=(struct InfoData *) AllocMem(sizeof(struct InfoData),MEMF_PUBLIC|MEMF_CLEAR)) { if (pkt=(struct StandardPacket *) AllocMem(sizeof(struct StandardPacket),MEMF_PUBLIC|MEMF_CLEAR)) { proc=(struct Process *) FindTask(NULL); if (cli=(struct CommandLineInterface *) (proc->pr_CLI<<2)) { ret1=cli->cli_ReturnCode; ret2=cli->cli_Result2; if (file=Open("*",MODE_NEWFILE)) { if (IsInteractive(file)) { pkt->sp_Msg.mn_Node.ln_Name=(char *) &(pkt->sp_Pkt); pkt->sp_Pkt.dp_Link=&(pkt->sp_Msg); pkt->sp_Pkt.dp_Port=&(proc->pr_MsgPort); pkt->sp_Pkt.dp_Type=ACTION_DISK_INFO; pkt->sp_Pkt.dp_Arg1=((ULONG) id)>>2; fh=(struct FileHandle *) (file<<2); PutMsg(fh->fh_Type,(struct Message *) pkt); WaitPort(&(proc->pr_MsgPort)); GetMsg(&(proc->pr_MsgPort)); win=(struct Window *) id->id_VolumeNode; } Close(file); } cli->cli_Result2=ret2; cli->cli_ReturnCode=ret1; } FreeMem(pkt,sizeof(struct StandardPacket)); } FreeMem(id,sizeof(struct InfoData)); } CloseLibrary((struct Library *) DOSBase); } return(win); } -------- Enjoy. Deven -- Deven T. Corzine Internet: deven@rpi.edu, shadow@pawl.rpi.edu Snail: 2214 12th St. Apt. 2, Troy, NY 12180 Phone: (518) 271-0750 Bitnet: deven@rpitsmts, userfxb6@rpitsmts UUCP: uunet!rpi!deven Simple things should be simple and complex things should be possible.
deven@rpi.edu (Deven T. Corzine) (07/22/90)
On 20 Jul 90 15:38:41 GMT, daveh@cbmvax.commodore.com (Dave Haynie) said:
Dave> Here's an excerpt from SetCPU V2.7 that does this:
^^^^^^^^^^^
Dave> // From SetFont 2.7 - by Dave Haynie
^^^^^^^^^^^
Freudian slip, Dave? :-)
Deven
--
Deven T. Corzine Internet: deven@rpi.edu, shadow@pawl.rpi.edu
Snail: 2214 12th St. Apt. 2, Troy, NY 12180 Phone: (518) 271-0750
Bitnet: deven@rpitsmts, userfxb6@rpitsmts UUCP: uunet!rpi!deven
Simple things should be simple and complex things should be possible.