395 lines
18 KiB
Python
395 lines
18 KiB
Python
# ------------------------------------------------------------------------------
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# This file is part of Appy, a framework for building applications in the Python
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# language. Copyright (C) 2007 Gaetan Delannay
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# Appy is free software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 3 of the License, or (at your option) any later
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# version.
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# Appy is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License along with
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# Appy. If not, see <http://www.gnu.org/licenses/>.
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# ------------------------------------------------------------------------------
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from appy.px import Px
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from appy.gen import utils as gutils
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# ------------------------------------------------------------------------------
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class Group:
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'''Used for describing a group of fields within a page.'''
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def __init__(self, name, columns=['100%'], wide=True, style='section2',
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hasLabel=True, hasDescr=False, hasHelp=False,
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hasHeaders=False, group=None, colspan=1, align='center',
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valign='top', css_class='', master=None, masterValue=None,
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cellpadding=1, cellspacing=1, cellgap='0.6em', label=None,
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translated=None):
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self.name = name
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# In its simpler form, field "columns" below can hold a list or tuple
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# of column widths expressed as strings, that will be given as is in
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# the "width" attributes of the corresponding "td" tags. Instead of
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# strings, within this list or tuple, you may give Column instances
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# (see below).
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self.columns = columns
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self._setColumns()
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# If field "wide" below is True, the HTML table corresponding to this
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# group will have width 100%. You can also specify some string value,
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# which will be used for HTML param "width".
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if wide == True:
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self.wide = '100%'
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elif isinstance(wide, basestring):
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self.wide = wide
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else:
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self.wide = ''
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# If style = 'fieldset', all widgets within the group will be rendered
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# within an HTML fieldset. If style is 'section1' or 'section2', widgets
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# will be rendered after the group title.
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self.style = style
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# If hasLabel is True, the group will have a name and the corresponding
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# i18n label will be generated.
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self.hasLabel = hasLabel
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# If hasDescr is True, the group will have a description and the
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# corresponding i18n label will be generated.
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self.hasDescr = hasDescr
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# If hasHelp is True, the group will have a help text associated and the
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# corresponding i18n label will be generated.
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self.hasHelp = hasHelp
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# If hasheaders is True, group content will begin with a row of headers,
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# and a i18n label will be generated for every header.
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self.hasHeaders = hasHeaders
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self.nbOfHeaders = len(columns)
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# If this group is himself contained in another group, the following
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# attribute is filled.
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self.group = Group.get(group)
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# If the group is rendered into another group, we can specify the number
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# of columns that this group will span.
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self.colspan = colspan
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self.align = align
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self.valign = valign
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self.cellpadding = cellpadding
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self.cellspacing = cellspacing
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# Beyond standard cellpadding and cellspacing, cellgap can define an
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# additional horizontal gap between cells in a row. So this value does
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# not add space before the first cell or after the last one.
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self.cellgap = cellgap
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if style == 'tabs':
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# Group content will be rendered as tabs. In this case, some
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# param combinations have no sense.
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self.hasLabel = self.hasDescr = self.hasHelp = False
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# The rendering is forced to a single column
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self.columns = self.columns[:1]
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# Header labels will be used as labels for the tabs.
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self.hasHeaders = True
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self.css_class = css_class
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self.master = master
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self.masterValue = gutils.initMasterValue(masterValue)
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if master: master.slaves.append(self)
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self.label = label # See similar attr of Type class.
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# If a translated name is already given here, we will use it instead of
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# trying to translate the group label.
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self.translated = translated
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def _setColumns(self):
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'''Standardizes field "columns" as a list of Column instances. Indeed,
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the initial value for field "columns" may be a list or tuple of
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Column instances or strings.'''
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for i in range(len(self.columns)):
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columnData = self.columns[i]
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if not isinstance(columnData, Column):
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self.columns[i] = Column(self.columns[i])
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@staticmethod
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def get(groupData):
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'''Produces a Group instance from p_groupData. User-defined p_groupData
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can be a string or a Group instance; this method returns always a
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Group instance.'''
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res = groupData
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if res and isinstance(res, basestring):
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# Group data is given as a string. 2 more possibilities:
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# (a) groupData is simply the name of the group;
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# (b) groupData is of the form <groupName>_<numberOfColumns>.
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groupElems = groupData.rsplit('_', 1)
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if len(groupElems) == 1:
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res = Group(groupElems[0])
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else:
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try:
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nbOfColumns = int(groupElems[1])
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except ValueError:
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nbOfColumns = 1
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width = 100.0 / nbOfColumns
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res = Group(groupElems[0], ['%.2f%%' % width] * nbOfColumns)
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return res
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def getMasterData(self):
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'''Gets the master of this group (and masterValue) or, recursively, of
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containing groups when relevant.'''
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if self.master: return (self.master, self.masterValue)
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if self.group: return self.group.getMasterData()
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def generateLabels(self, messages, classDescr, walkedGroups,
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content='fields'):
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'''This method allows to generate all the needed i18n labels related to
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this group. p_messages is the list of i18n p_messages (a PoMessages
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instance) that we are currently building; p_classDescr is the
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descriptor of the class where this group is defined. The type of
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content in this group is specified by p_content.'''
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# A part of the group label depends on p_content.
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gp = (content == 'searches') and 'searchgroup' or 'group'
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if self.hasLabel:
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msgId = '%s_%s_%s' % (classDescr.name, gp, self.name)
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messages.append(msgId, self.name)
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if self.hasDescr:
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msgId = '%s_%s_%s_descr' % (classDescr.name, gp, self.name)
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messages.append(msgId, ' ', nice=False)
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if self.hasHelp:
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msgId = '%s_%s_%s_help' % (classDescr.name, gp, self.name)
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messages.append(msgId, ' ', nice=False)
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if self.hasHeaders:
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for i in range(self.nbOfHeaders):
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msgId = '%s_%s_%s_col%d' % (classDescr.name, gp, self.name, i+1)
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messages.append(msgId, ' ', nice=False)
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walkedGroups.add(self)
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if self.group and (self.group not in walkedGroups) and \
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not self.group.label:
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# We remember walked groups for avoiding infinite recursion.
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self.group.generateLabels(messages, classDescr, walkedGroups,
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content=content)
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def insertInto(self, elems, uiGroups, page, className, content='fields'):
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'''Inserts the UiGroup instance corresponding to this Group instance
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into p_elems, the recursive structure used for displaying all
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elements in a given p_page (fields, searches, transitions...) and
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returns this UiGroup instance.'''
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# First, create the corresponding UiGroup if not already in p_uiGroups.
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if self.name not in uiGroups:
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uiGroup = uiGroups[self.name] = UiGroup(self, page, className,
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content=content)
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# Insert the group at the higher level (ie, directly in p_elems)
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# if the group is not itself in a group.
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if not self.group:
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elems.append(uiGroup)
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else:
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outerGroup = self.group.insertInto(elems, uiGroups, page,
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className, content=content)
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outerGroup.addElement(uiGroup)
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else:
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uiGroup = uiGroups[self.name]
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return uiGroup
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class Column:
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'''Used for describing a column within a Group like defined above.'''
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def __init__(self, width, align="left"):
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self.width = width
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self.align = align
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class UiGroup:
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'''On-the-fly-generated data structure that groups all elements
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(fields, searches, transitions...) sharing the same Group instance, that
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the currently logged user can see.'''
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# PX that renders a help icon for a group.
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pxHelp = Px('''<acronym title="obj.translate('help', field=field)"><img
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src=":url('help')"/></acronym>''')
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# PX that renders the content of a group (which is refered as var "field").
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pxContent = Px('''
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<table var="cellgap=field.cellgap" width=":field.wide"
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align=":ztool.flipLanguageDirection(field.align, dir)"
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id=":tagId" name=":tagName" class=":groupCss"
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cellspacing=":field.cellspacing" cellpadding=":field.cellpadding">
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<!-- Display the title of the group if not rendered a fieldset. -->
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<tr if="(field.style != 'fieldset') and field.hasLabel">
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<td colspan=":len(field.columnsWidths)" class=":field.style"
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align=":dleft">
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<x>::_(field.labelId)</x><x if="field.hasHelp">:field.pxHelp</x>
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</td>
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</tr>
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<tr if="(field.style != 'fieldset') and field.hasDescr">
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<td colspan=":len(field.columnsWidths)"
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class="discreet">::_(field.descrId)</td>
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</tr>
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<!-- The column headers -->
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<tr>
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<th for="colNb in range(len(field.columnsWidths))"
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align="ztool.flipLanguageDirection(field.columnsAligns[colNb], dir)"
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width=":field.columnsWidths[colNb]">::field.hasHeaders and \
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_('%s_col%d' % (field.labelId, (colNb+1))) or ''</th>
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</tr>
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<!-- The rows of widgets -->
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<tr valign=":field.valign" for="row in field.elements">
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<td for="field in row"
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colspan="field.colspan"
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style=":not loop.field.last and ('padding-right:%s'% cellgap) or ''">
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<x if="field">
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<x if="field.type == 'group'">:field.pxView</x>
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<x if="field.type != 'group'">:field.pxRender</x>
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</x>
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</td>
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</tr>
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</table>''')
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# PX that renders a group of fields (the group is refered as var "field").
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pxView = Px('''
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<x var="tagCss=field.master and ('slave_%s_%s' % \
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(field.masterName, '_'.join(field.masterValue))) or '';
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widgetCss=field.css_class;
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groupCss=tagCss and ('%s %s' % (tagCss, widgetCss)) or widgetCss;
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tagName=field.master and 'slave' or '';
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tagId='%s_%s' % (zobj.UID(), field.name)">
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<!-- Render the group as a fieldset if required -->
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<fieldset if="field.style == 'fieldset'">
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<legend if="field.hasLabel">
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<i>::_(field.labelId)></i><x if="field.hasHelp">:field.pxHelp</x>
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</legend>
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<div if="field.hasDescr" class="discreet">::_(field.descrId)</div>
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<x>:field.pxContent</x>
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</fieldset>
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<!-- Render the group as a section if required -->
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<x if="field.style not in ('fieldset', 'tabs')">:field.pxContent</x>
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<!-- Render the group as tabs if required -->
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<x if="field.style == 'tabs'" var2="lenFields=len(field.elements)">
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<table width=":field.wide" class=":groupCss" id=":tagId" name=":tagName">
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<!-- First row: the tabs. -->
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<tr valign="middle"><td style="border-bottom: 1px solid #ff8040">
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<table style="position:relative; bottom:-2px"
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cellpadding="0" cellspacing="0">
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<tr valign="bottom">
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<x for="row in field.elements"
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var2="rowNb=loop.row.nb;
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tabId='tab_%s_%d_%d' % (field.name, rowNb, lenFields)">
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<td><img src=":url('tabLeft')" id=":'%s_left' % tabId"/></td>
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<td style=":url('tabBg', bg=True)" id=":tabId">
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<a onclick=":'showTab(%s)' % q('%s_%d_%d' % (field.name, rowNb, \
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lenFields))"
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class="clickable">:_('%s_col%d' % (field.labelId, rowNb))</a>
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</td>
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<td><img id=":'%s_right' % tabId" src=":url('tabRight')"/></td>
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</x>
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</tr>
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</table>
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</td></tr>
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<!-- Other rows: the fields -->
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<tr for="row in field.elements"
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id=":'tabcontent_%s_%d_%d' % (field.name, loop.row.nb, lenFields)"
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style=":loop.row.nb==0 and 'display:table-row' or 'display:none')">
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<td var="field=row[0]">
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<x if="field.type == 'group'">:field.pxView</x>
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<x if="field.type != 'group'">:field.pxRender</x>
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</td>
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</tr>
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</table>
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<script type="text/javascript">:'initTab(%s,%s)' % \
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(q('tab_%s' % field.name), q('%s_1_%d' % (field.name, lenFields)))">
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</script>
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</x>
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</x>''')
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# PX that renders a group of searches.
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pxViewSearches = Px('''
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<x var="expanded=req.get(field.labelId, 'collapsed') == 'expanded'">
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<!-- Group name, prefixed by the expand/collapse icon -->
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<div class="portletGroup">
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<img class="clickable" style="margin-right: 3px" align=":dleft"
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id=":'%s_img' % field.labelId"
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src=":expanded and url('collapse.gif') or url('expand.gif')"
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onclick=":'toggleCookie(%s)' % q(field.labelId)"/>
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<x if="not field.translated">:_(field.labelId)</x>
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<x if="field.translated">:field.translated</x>
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</div>
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<!-- Group content -->
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<div var="display=expanded and 'display:block' or 'display:none'"
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id=":field.labelId" style=":'padding-left: 10px; %s' % display">
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<x for="searches in field.elements">
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<x for="elem in searches">
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<!-- An inner group within this group -->
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<x if="elem.type == 'group'"
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var2="field=elem">:field.pxViewSearches</x>
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<!-- A search -->
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<x if="elem.type != 'group'" var2="search=elem">:search.pxView</x>
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</x>
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</x>
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</div>
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</x>''')
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# PX that renders a group of transitions.
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pxViewTransitions = Px('''
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<!-- Render a group of transitions, as a one-column table -->
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<table>
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<x for="row in uiGroup.elements">
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<x for="transition in row"><tr><td>:transition.pxView</td></tr></x>
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</x>
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</table>''')
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# What PX to use, depending on group content?
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pxByContent = {'fields': pxView, 'searches': pxViewSearches,
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'transitions': pxViewTransitions}
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def __init__(self, group, page, className, content='fields'):
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'''A UiGroup can group various kinds of elements: fields, searches,
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transitions..., The type of content that one may find in this group
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is given in p_content.
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* p_group is the Group instance corresponding to this UiGroup;
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* p_page is the Page instance where the group is rendered (for
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transitions, it corresponds to a virtual page
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"workflow");
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* p_className is the name of the class that holds the elements to
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group.'''
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self.type = 'group'
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# All p_group attributes become self attributes. This is required
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# because a UiGroup, in some PXs, must behave like a Field (ie, have
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# the same attributes, like "master".
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for name, value in group.__dict__.iteritems():
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if not name.startswith('_'):
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setattr(self, name, value)
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self.group = group
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self.columnsWidths = [col.width for col in group.columns]
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self.columnsAligns = [col.align for col in group.columns]
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# Names of i18n labels for this group.
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labelName = self.name
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prefix = className
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if group.label:
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if isinstance(group.label, basestring): prefix = group.label
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else: # It is a tuple (className, name)
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if group.label[1]: labelName = group.label[1]
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if group.label[0]: prefix = group.label[0]
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gp = (content == 'searches') and 'searchgroup' or 'group'
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self.labelId = '%s_%s_%s' % (prefix, gp, labelName)
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self.descrId = self.labelId + '_descr'
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self.helpId = self.labelId + '_help'
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# The name of the page where the group lies
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self.page = page.name
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# The elements contained in the group, that the current user may see.
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# They will be stored by m_addElement below as a list of lists because
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# they will be rendered as a table.
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self.elements = [[]]
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# PX to use for rendering this group.
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self.px = self.pxByContent[content]
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def addElement(self, element):
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'''Adds p_element into self.elements. We try first to add p_element into
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the last row. If it is not possible, we create a new row.'''
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# Get the last row
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lastRow = self.elements[-1]
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numberOfColumns = len(self.columnsWidths)
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# Compute the number of columns already filled in the last row.
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filledColumns = 0
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for rowElem in lastRow: filledColumns += rowElem.colspan
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freeColumns = numberOfColumns - filledColumns
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if freeColumns >= element.colspan:
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# We can add the element in the last row.
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lastRow.append(element)
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else:
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if freeColumns:
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# Terminate the current row by appending empty cells
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for i in range(freeColumns): lastRow.append('')
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# Create a new row
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self.elements.append([element])
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# ------------------------------------------------------------------------------
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