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# mapscriptsupp.tcl
#
# define procs to invoke object methods using an object pointer
# tom poindexter, nov 2000, tpoindex@nyx.net
#
# e.g. shapeObj method arg arg ...
# can be invoked on a shapeObj pointer as:
# shapeObjRef $shapeObjPointer method arg arg ...
#
# convenience procedures:
# getDBFNames $DBFHandle :returns list of field names
# getDBFTypes $DBFHandle :returns list of field types
# getDBFValues $DBFHandle $rec :returns list of field values
# getQueryInfo $mapPtr $layerPtr :return "field value" from query
# fix SWIG error
# some swig versions don't handle namespaces when generating shadow objects
# mapscript just has one - ms_error
#
if {![string length [info commands ::mapscript::ms_error]]} {
catch {
::mapscript::errorObj ::mapscript::ms_error -this [::mapscript::ms_error_get]
}
}
#
# now define object helper procs
#
namespace eval ::mapscript {
proc _mapscript_init_ {} {
set code {
proc OBJECTRef {ptr method args} {
# check ptr for correct object type
#if {! [regexp {_[^_]*_OBJECT_p} $ptr]} {
# error "OBJECTRef pointer \"$ptr\" has wrong object class"
#}
# check for configure/cget/delete commands
set member ""
set delete ""
switch -- $method {
configure {
set command _set
set member _[string range [lindex $args 0] 1 end]
set args [lrange $args 1 end]
}
cget {
set command _get
set member _[string range [lindex $args 0] 1 end]
set args ""
}
delete {
set delete delete_
set command ""
set args ""
}
default {
set command _$method
}
}
# check of existence of command
if {! [string length \
[info command ::mapscript::${delete}OBJECT${member}${command}]]} {
error "OBJECT does not have method named \"$method\", or \
a member named \"$member\""
}
# invoke command
return [uplevel "::mapscript::${delete}OBJECT${member}${command} \
$ptr $args"]
}
}
foreach obj {classObj colorObj errorObj featureListNodeObj itemObj \
labelCacheMemberObj labelCacheObj labelObj layerObj \
legendObj lineObj mapObj markerCacheMemberObj pointObj \
projectionObj queryMapObj rectObj referenceMapObj \
resultCacheMemberObj resultCacheObj scalebarObj shapeObj \
shapefileObj symbolSetObj webObj \
DBFInfo} {
regsub -all OBJECT $code $obj proc_code
eval $proc_code
}
}
# run the help proc initialization, then get rid of it
_mapscript_init_
rename _mapscript_init_ {}
#
# now create convenience procs
#
proc getDBFNames {dbf} {
set n [msDBFGetFieldCount $dbf]
set names ""
for {set i 0} {$i < $n} {incr i} {
lappend names [DBFInfoRef $dbf getFieldName $i]
}
return $names
}
proc getDBFTypes {dbf} {
set n [msDBFGetFieldCount $dbf]
set types ""
for {set i 0} {$i < $n} {incr i} {
set t [DBFInfoRef $dbf getFieldType $i]
switch $t \
$::mapscript::FTString {set t string} \
$::mapscript::FTInteger {set t integer} \
$::mapscript::FTDouble {set t double} \
default {set t invalid}
lappend t [DBFInfoRef $dbf getFieldWidth $i]
lappend types $t
}
return $types
}
proc getDBFValues {dbf rec} {
set n [msDBFGetFieldCount $dbf]
set r [msDBFGetRecordCount $dbf]
if {$rec >= $r || $rec < -1} {return ""}
set values ""
for {set i 0} {$i < $n} {incr i} {
switch [DBFInfoRef $dbf getFieldType $i] \
$::mapscript::FTString {
set t [msDBFReadStringAttribute $dbf $rec $i]
} \
$::mapscript::FTInteger {
set t [msDBFReadIntegerAttribute $dbf $rec $i]
} \
$::mapscript::FTDouble {
set t [msDBFReadDoubleAttribute $dbf $rec $i]
} \
default {set t ""}
lappend values $t
}
return $values
}
proc getQueryInfo {mapPtr layerPtr} {
layerObjRef $layerPtr open [mapObjRef $mapPtr cget -shapepath]
set rescachePtr [layerObjRef $layerPtr cget -resultcache]
set numResults [resultCacheObjRef $rescachePtr cget -numresults]
for {set i 0} {$i < $numResults} {incr i} {
set resmemPtr [layerObjRef $layerPtr getResult $i]
set shpIdx [resultCacheMemberObjRef $resmemPtr cget -shapeindex]
set tileIdx [resultCacheMemberObjRef $resmemPtr cget -tileindex]
set shpPtr [shapeObj -args $mapscript::MS_SHAPE_NULL]
set rc [layerObjRef $layerPtr getShape $shpPtr $tileIdx $shpIdx]
set numValues [shapeObjRef $shpPtr cget -numvalues]
set pairs ""
for {set j 0} {$j < $numValues} {incr j} {
lappend pairs [layerObjRef $layerPtr getItem $j] \
[shapeObjRef $shpPtr getValue $j]
}
# delete the temporary shpPtr
catch {rename $shpPtr {}}
}
layerObjRef $layerPtr close
return $pairs
}
} ;#end of namespace command
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