CommandQueue.C

00001 /***************************************************************************
00002 *cr 
00003 *cr (C) Copyright 1995-2019 The Board of Trustees of the 
00004 *cr University of Illinois 
00005 *cr All Rights Reserved 
00006 *cr 
00007 ***************************************************************************/
00008 
00009 /***************************************************************************
00010 * RCS INFORMATION:
00011 *
00012 * $RCSfile: CommandQueue.C,v $
00013 * $Author: johns $ $Locker: $ $State: Exp $
00014 * $Revision: 1.57 $ $Date: 2019年01月17日 21:20:58 $
00015 *
00016 ***************************************************************************
00017 * DESCRIPTION:
00018 * 
00019 * This stores all the Commands to be run in a queue. The idea is that
00020 * the various events add Commands to the command queue then they
00021 * are read off the queue and the UIs are notified.
00022 *
00023 * Commands may be logged to a file, if desired.
00024 *
00025 ***************************************************************************/
00026 
00027 #include "CommandQueue.h"
00028 #include "Command.h"
00029 #include "UIObject.h"
00030 #include "TextEvent.h"
00031 #include "utilities.h"
00032 #include "config.h"
00033 
00035 CommandQueue::CommandQueue(void) : cmdlist(64) {
00036 }
00037 
00038 
00040 // we must remove all commands, and delete them as well.
00041 // if logging, must close file
00042 CommandQueue::~CommandQueue(void) {
00043 for (int i=0; i<cmdlist.num(); i++)
00044 delete cmdlist[i];
00045 }
00046 
00047 void CommandQueue::register_UI(UIObject *ui) {
00048 if (uilist.find(ui) == -1) 
00049 uilist.append(ui);
00050 }
00051 
00052 void CommandQueue::unregister_UI(UIObject *ui) {
00053 int ind = uilist.find(ui);
00054 if (ind >= 0)
00055 uilist.remove(ind);
00056 }
00057 
00059 void CommandQueue::runcommand(Command *cmd) {
00060 // ... and report the action has been done
00061 Command::Cmdtype cmdtype = cmd->gettype();
00062 int n = uilist.num();
00063 for (int i=0; i<n; i++) {
00064 UIObject *ui = uilist[i];
00065 // XXX call act_on_command even if not ui->active()
00066 if (ui->want_command(cmdtype)) 
00067 ui->act_on_command(cmdtype, cmd);
00068 }
00069 delete cmd;
00070 }
00071 
00073 
00074 // add a new command to the list ... always adds to queue, does not
00075 // execute. 
00076 void CommandQueue::append(Command *cmd) {
00077 cmdlist.append(cmd);
00078 }
00079 
00080 void CommandQueue::execute_all() {
00081 int n = cmdlist.num();
00082 for (int i=0; i<n; i++) {
00083 runcommand(cmdlist[i]);
00084 }
00085 cmdlist.clear();
00086 }
00087 
00088 void CommandQueue::check_events() {
00089 for (int i=0; i<uilist.num(); i++) {
00090 UIObject *ui = uilist[i];
00091 if (ui->active())
00092 ui->check_event();
00093 }
00094 }
00095 
00096