Special Types

The different functionalities of Gizmo(QP) make use of several object types, each dedicated to specific task. Not all are formal types, as some are no more than a working convention, e.g. the crumb data tuple. This sections demos a few of the these special object types.

eXportable
QP implements an export as an informal 4-tuple. Gizmo formalizes the eXportable type, that is equivalent to a QP export except for the fact that it is only a QP export if it passes contextual access control.
See module: gz.fill.exportable

Dhi
The Dhi object for an export is contributed to by all participants of a response, making complex DHTML pages easier to build and debug, as well as simpler to render by the client.
See module: gz.fill.dhi

Crumb
A 5-tuple, that contains navigation-pertinent information about an export.
See module: gz.fill.directory

Python source : gizmo(qp) directory, /specials/

specials.py#code

__revision__ = "$Id: specials.py 964 2008-03-17 14:03:29Z mario $" from gz.pub.common import page, get_dhi from gz.fill.exportable import X from gz.fill.dhi import Dhi from gz.fill.directory import Directory from gz.lib.design_patterns import bunch class SpecialsDir(Directory): exportables = [ # X(component, attribute, crumb, title, allow=None, dhi=None) X('', 'index', 'Special Types', 'Special Types'), X('x', 'x', 'X', 'eXportable'), X('dhi', 'dhinfo', 'Dhi', 'Dhi', None, # Example of a pre-initialized Dhi dhi=Dhi( css_codes=[ '.bb { border: 3px dotted blue; }', '.bg { border: 2px dashed green; }', '.by { border: 3px dashed yellow; }', '.br { border: 2px dotted red; }', ], js_codes=[ 'var kount=0;', 'var initial_body_klass;', "var klasses = ['bb','bg','by','br'];", """ function get_body() { return document.getElementsByTagName('body')[0]; }""", """ function mod(divisee, base) { return Math.round(divisee - (Math.floor(divisee/base)*base)); }""", """ function set_body_klass() { get_body().className = initial_body_klass+' '+klasses[mod(kount, 4)]; kount += 1; window.setTimeout('set_body_klass();', 1000); }""", ], onload_actions=[ "initial_body_klass = get_body().className;", "set_body_klass();", ], meta=bunch(description='dhtmlinfo object test page'), http_equiv=bunch(refresh="60;url='.'"))), X('crumb', 'crumb', 'Crumb', 'Crumb Tuple'), ] def index(self): return page(get_dhi().x.title, template='specials.html') def dhinfo(self): return page(get_dhi().x.title, template='specials_dhi.html') def x(self): return page(get_dhi().x.title, template='specials_x.html') def crumb(self): return page(get_dhi().x.title, template='specials_crumb.html', get_crumbs=self.get_crumbs)