Initial revision

Lib/lib-stdwin/FormSplit.py

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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 minsize(self, m):
+		max_width, max_height = 0, 0
+		for c in self.children:
+			c.form_width, c.form_height = c.minsize(m)
+			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.minsize(self.beginmeasuring())
+			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
+	#