Open Mash Cross Reference
mash/tcl/tgmb/mgr-tgmb.tcl

   # mgr-tgmb.tcl --
   #
   #       FIXME: This file needs a description here.
   #
   # Copyright (c) 1998-2002 The Regents of the University of California.
   # All rights reserved.
   #
   # Redistribution and use in source and binary forms, with or without
   # modification, are permitted provided that the following conditions are met:
  #
  # A. Redistributions of source code must retain the above copyright notice,
  #    this list of conditions and the following disclaimer.
  # B. Redistributions in binary form must reproduce the above copyright notice,
  #    this list of conditions and the following disclaimer in the documentation
  #    and/or other materials provided with the distribution.
  # C. Neither the names of the copyright holders nor the names of its
  #    contributors may be used to endorse or promote products derived from this
  #    software without specific prior written permission.
  #
  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
  # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  # ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
  # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  # OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  
  TGMB_Manager instproc new_source { src } {
          $self instvar sources_
  
          set src_id [$src srcid]
          set cname  [$src cname]
          set sources_($src_id) $cname
          TCP/MediaPad send_srcname $src_id $cname
  }
  
  
  TGMB_Manager instproc cname_update { src newName } {
          $self instvar sources_
  
          set src_id [$src srcid]
          set sources_($src_id) $newName
          TCP/MediaPad send_srcname $src_id $newName
  }
  
  
  TGMB_Manager instproc create_canvas { page_id } {
          $self instvar canvas_
  
          if { ![info exists canvas_($page_id)] } {
                  set canvas_($page_id) [new TGMB_Canvas $page_id]
                  TCP/MediaPad send_newpage $page_id
          }
  
          return $canvas_($page_id)
  }
  
  
  TGMB_Manager instproc get_canvas { page_id } {
          $self instvar canvas_
          if [info exists canvas_($page_id)] {
                  return $canvas_($page_id)
          } else {
                  return ""
          }
  }
  
  
  TGMB_Manager instproc get_page_list { } {
          $self instvar canvas_
          return [array names canvas_]
  }
  
  
  TGMB_Manager instproc get_source_list { } {
          $self instvar sources_
          return [array get sources_]
  }
  
  
  TGMB_Manager instproc source_action { args } {
  }
  
  
  TGMB_Manager instproc page_action { args } {
  }
  
  
  TGMB_Canvas set got_updates_recently_ 0
  TGMB_Canvas set update_scheduled_ 0
  
  
  TGMB_Canvas public schedule_update_clients { } {
          $self instvar after_id_ got_updates_recently_ missed_updates_
          if [info exists after_id_] return
         set after_id_ [after 100 "$self do_update_clients"]
         set got_updates_recently_ 0
         set missed_updates_ 0
 }
 
 
 TGMB_Canvas private do_update_clients { } {
         $self instvar after_id_ got_updates_recently_ missed_updates_
         if $got_updates_recently_ {
                 set got_updates_recently_ 0
                 if {$missed_updates_ > 15 } {
                         # it's been a while since we updated
                         # let's do so now
                         $self actually_update
                         return
                 }
                 incr missed_updates_
                 set after_id_ [after 100 "$self do_update_clients"]
         } else {
                 $self actually_update
         }
 }
 
 
 TGMB_Canvas private actually_update {} {
         $self instvar after_id_ got_updates_recently_ missed_updates_ \
                         update_scheduled_
         TCP/MediaPad send_data_to_everyone $self
         unset after_id_
         set missed_updates_ 0
         set got_updates_recently_ 0
         set update_scheduled_ 0
 }
 
 
 
 
 proc extract_file { filename } {
         # read in the original file
         set file [open $filename]
         fconfigure $file -translation binary
         set orig_image ""
         while { ![eof $file] } {
                 append orig_image [read $file 1024]
         }
         close $file
         if { [string length $orig_image]==0 } {
                 error "Invalid image file: $filename"
         }
         return $orig_image
 }