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# A FormSplit lets you place its children exactly where you want them
# (including silly places!).
# It does no explicit geometry management except moving its children
# when it is moved.
# The interface to place children is as follows.
# Before you add a child, you may specify its (left, top) position
# relative to the FormSplit. If you don't specify a position for
# a child, it goes right below the previous child; the first child
# goes to (0, 0) by default.
# NB: This places data attributes named form_* on its children.
# XXX Yes, I know, there should be options to do all sorts of relative
# placement, but for now this will do.
from Split import Split
class FormSplit(Split):
#
def create(self, parent):
self.next_left = self.next_top = 0
self.last_child = None
return Split.create(self, parent)
#
def getminsize(self, (m, sugg_size)):
max_width, max_height = 0, 0
for c in self.children:
c.form_width, c.form_height = c.getminsize(m, (0, 0))
max_width = max(max_width, c.form_width + c.form_left)
max_height = max(max_height, \
c.form_height + c.form_top)
return max_width, max_height
#
def getbounds(self):
return self.bounds
#
def setbounds(self, bounds):
self.bounds = bounds
fleft, ftop = bounds[0]
for c in self.children:
left, top = c.form_left + fleft, c.form_top + ftop
right, bottom = left + c.form_width, top + c.form_height
c.setbounds((left, top), (right, bottom))
#
def placenext(self, (left, top)):
self.next_left = left
self.next_top = top
self.last_child = None
#
def addchild(self, child):
if self.last_child:
width, height = \
self.last_child.getminsize(self.beginmeasuring(), \
(0, 0))
self.next_top = self.next_top + height
child.form_left = self.next_left
child.form_top = self.next_top
Split.addchild(self, child)
self.last_child = child
#
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