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|
; docformat = 'rst'
;
; NAME:
; cgCoord__Define
;
; PURPOSE:
; An object for maintaining a coordinate system for data annotation or display.
; Simply calling the Draw method of the object sets up the data coordinate system.
;
;******************************************************************************************;
; ;
; Copyright (c) 2011, by Fanning Software Consulting, Inc. All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * 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. ;
; * Neither the name of Fanning Software Consulting, Inc. 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 FANNING SOFTWARE CONSULTING, INC. ''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 FANNING SOFTWARE CONSULTING, INC. 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; ;
; 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. ;
;******************************************************************************************;
;
;+--------------------------------------------------------------------------
; An object for maintaining a coordinate system for data annotation or display.
; Simply calling the Draw method of the object sets up the data coordinate system.
;
; :Categories:
; Object Programming, Graphics
;
; :Author:
; FANNING SOFTWARE CONSULTING::
; David W. Fanning
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: david@idlcoyote.com
; Coyote's Guide to IDL Programming: http://www.idlcoyote.com
;
; :History:
; Change History::
; Written, by David W. Fanning, 7 November 2011.
;
; :Copyright:
; Copyright (c) 2011, Fanning Software Consulting, Inc.
;---------------------------------------------------------------------------
;
;+--------------------------------------------------------------------------
; The initialization method of the object.
;
; :Keywords:
; position: in, optional, type=float
; The normalized position of the map projection space in the graphics window.
; The default position is [0.075, 0.075, 0.925, 0.900].
; xlog: in, optional, type=boolean, default=0
; Set this keyword if you wish the X axis range to be logarithmic.
; ylog: in, optional, type=boolean, default=0
; Set this keyword if you wish the Y axis range to be logarithmic.
; xrange: in, optional, type=various
; Set this keyword to the X axis range desired in the data coordinate system.
; The default os [0,1].
; yrange: in, optional, type=various
; Set this keyword to the Y axis range desired in the data coordinate system.
; The default os [0,1].
; _ref_extra: in, optional, type=various
; Any keywords appropriate for superclass objects can also be specified.
;
;---------------------------------------------------------------------------
FUNCTION cgCoord::INIT, $
POSITION=position, $
XLOG=xlog, $
XRANGE=xrange, $
YLOG=ylog, $
YRANGE=yrange, $
_REF_EXTRA=extraKeywords
Compile_Opt idl2
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /CANCEL
void = cgErrorMsg()
RETURN, 0
ENDIF
; Check parameters.
IF N_Elements(position) EQ 0 THEN position = [0.15, 0.125, 0.95, 0.925]
IF N_Elements(xrange) EQ 0 THEN xrange = [0,1]
IF N_Elements(yrange) EQ 0 THEN yrange = [0,1]
; Call the superclass INIT method.
ok = self->cgContainer::INIT(_Extra=extraKeywords)
IF NOT ok THEN Message, 'Failed to initialise the system component cgContainer.'
; Load the object.
self._cg_position = position
self._cg_xrange = xrange
self._cg_yrange = yrange
self._cg_xlog = Keyword_Set(xlog)
self._cg_ylog = Keyword_Set(ylog)
RETURN, 1
END
;+--------------------------------------------------------------------------
; This method sets up the data coordinate space of the object by drawing
; an "invisible" plot.
;---------------------------------------------------------------------------
PRO cgCoord::Draw, _EXTRA=extra
; You cannot do the next part successfully, unless there is an open window.
IF ((!D.FLAGS AND 256) NE 0) AND !D.Window LT 0 THEN BEGIN
createdWindow = 1
Window, /Pixmap
ENDIF ELSE createdWindow = 0
; Shouldn't be getting keywords here.
IF N_Elements(extra) NE 0 THEN BEGIN
Message, 'Received unexpected keywords.', /Informational
Help, extra
ENDIF
; Draw an invisible plot
Plot, self._cg_xrange, self._cg_yrange, POSITION=self._cg_position, $
XSTYLE=5, YSTYLE=21, /NODATA, /NOERASE, $
YLOG=self._cg_ylog, XLOG=self._cg_xlog
; Clean up.
IF createdWindow THEN WDelete, !D.Window
END
;+--------------------------------------------------------------------------
; This method allows the user to get various properties of the object. In general,
; the same keywords that are used for the INIT method can be used here.
;---------------------------------------------------------------------------
PRO cgCoord::GetProperty, $
POSITION=position, $
XLOG=xlog, $
XRANGE=xrange, $
YLOG=ylog, $
YRANGE=yrange, $
_REF_EXTRA=extraKeywords
Compile_Opt idl2
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /CANCEL
void = cgErrorMsg()
RETURN
ENDIF
; Object properties.
position = self._cg_position
xrange = self._cg_xrange
yrange = self._cg_yrange
xlog = self._cg_xlog
ylog = self._cg_ylog
; Need superclass properties?
IF N_Elements(extraKeywords) NE 0 THEN self -> cgContainer::GetProperty, _Extra=extraKeywords
END
;+--------------------------------------------------------------------------
; This method allows the user to set various properties of the object. In general,
; the same keywords that are used for the INIT method can be used here.
;---------------------------------------------------------------------------
PRO cgCoord::SetProperty, $
POSITION=position, $
XLOG=xlog, $
XRANGE=xrange, $
YLOG=ylog, $
YRANGE=yrange, $
_EXTRA=extraKeywords
Compile_Opt idl2
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /CANCEL
void = cgErrorMsg()
RETURN
ENDIF
; Object properties.
IF N_Elements(position) NE 0 THEN self._cg_position = position
IF N_Elements(xlog) NE 0 THEN self._cg_xlog = Keyword_Set(xlog)
IF N_Elements(xrange) NE 0 THEN self._cg_xrange = xrange
IF N_Elements(ylog) NE 0 THEN self._cg_ylog = Keyword_Set(ylog)
IF N_Elements(yrange) NE 0 THEN self._cg_yrange = yrange
; Need to set superclass properties?
IF N_Elements(extraKeywords) NE 0 THEN self -> cgContainer::SetProperty, _Extra=extraKeywords
END
;+--------------------------------------------------------------------------
; This is the clean-up routine for the object.
;---------------------------------------------------------------------------
PRO cgCoord::CLEANUP
self -> cgContainer::CLEANUP
END
;+--------------------------------------------------------------------------
; This is the class definition module.
;
; :Params:
; class: out, optional, type=structure
; Occasionally, it is useful to have an object class definition as
; a structure variable. Using this output keyword will allow that.
;---------------------------------------------------------------------------
PRO cgCoord__Define, class
class = { cgCoord, $
_cg_position: DblArr(4), $ ; A four-element array indicating normalized position of axes.
_cg_xrange: DblArr(2), $ ; A two-element array representing the range of the X axis.
_cg_yrange: DblArr(2), $ ; A two-element array representing the range of the Y axis.
_cg_xlog: 0L, $ ; A flag that indicates an XLOG axis.
_cg_ylog: 0L, $ ; A flag that indicates an YLOG axis.
INHERITS cgContainer $
}
END
|
