def layout_constraints(self):
""" The constraints generation for a HGroup.
This method supplies horizontal group constraints for the
children of the container in addition to any user-supplied
constraints.
"""
widgets = self.visible_widgets()
items = [self.leading_spacer] + widgets + [self.trailing_spacer]
cns = self.constraints[:]
cns.append(hbox(*items, spacing=self.spacing))
cns.append(align('v_center', *widgets))
if self.align_widths:
cns.append(align('width', *widgets))
return cns
def layout_constraints(self):
""" The constraints generation for a HGroup.
This method supplies horizontal group constraints for the
children of the container in addition to any user-supplied
constraints.
This method cannot be overridden from Enaml syntax.
"""
widgets = self.visible_widgets()
items = [self.leading_spacer] + widgets + [self.trailing_spacer]
cns = self.constraints[:]
cns.append(hbox(*items, spacing=self.spacing))
cns.append(align('v_center', *widgets))
if self.align_widths:
cns.append(align('width', *widgets))
return cns
def layout_constraints(self):
""" The constraints generation for a VGroup.
This method supplies left-aligned vertical group constraints for
the children of the container in addition to any user-supplied
constraints.
"""
widgets = self.visible_widgets()
items = [self.leading_spacer] + widgets + [self.trailing_spacer]
cns = self.constraints[:]
cns.append(vbox(*items, spacing=self.spacing))
cns.append(align('left', *widgets))
return cns
def layout_constraints(self):
""" The constraints generation for a VGroup.
This method supplies left-aligned vertical group constraints for
the children of the container in addition to any user-supplied
constraints.
This method cannot be overridden from Enaml syntax.
"""
widgets = self.visible_widgets()
items = [self.leading_spacer] + widgets + [self.trailing_spacer]
cns = self.constraints[:]
cns.append(vbox(*items, spacing=self.spacing))
cns.append(align('left', *widgets))
return cns
def _component_constraints(self):
""" Supplies the constraints which layout the children in a
two column form.
"""
# FIXME: do something sensible when children are not visible.
children = list(self.widgets)
labels = children[::2]
widgets = children[1::2]
n_labels = len(labels)
n_widgets = len(widgets)
if n_labels != n_widgets:
if n_labels > n_widgets:
odd_child = labels.pop()
else:
odd_child = widgets.pop()
else:
odd_child = None
layout_strength = self.layout_strength
constraints = []
# Align the left side of each widget with the midline constraint
# variable of the form.
midline = self.midline
for widget in widgets:
cn = (widget.left == midline) | layout_strength
constraints.append(cn)
# Arrange each label/widget pair horizontally in the form
# XXX this is a highly inefficient way to generate these
# constraints. It starts to be noticeably slow when the
# form has around 20 rows. This can be done better.
labels_widgets = zip(labels, widgets)
vbox_args = [hbox(label, widget) for label, widget in labels_widgets]
if odd_child is not None:
vbox_args.append(odd_child)
constraints.append(vbox(*vbox_args))
for label, widget in labels_widgets:
# FIXME: baselines would be much better.
constraints.append(
align('v_center', label, widget) | layout_strength)
return constraints
def _component_constraints(self):
""" Supplies the constraints which layout the children in a
two column form.
"""
# FIXME: do something sensible when children are not visible.
children = list(self.widgets)
labels = children[::2]
widgets = children[1::2]
n_labels = len(labels)
n_widgets = len(widgets)
if n_labels != n_widgets:
if n_labels > n_widgets:
odd_child = labels.pop()
else:
odd_child = widgets.pop()
else:
odd_child = None
layout_strength = self.layout_strength
constraints = []
# Align the left side of each widget with the midline constraint
# variable of the form.
midline = self.midline
for widget in widgets:
cn = (widget.left == midline) | layout_strength
constraints.append(cn)
# Arrange each label/widget pair horizontally in the form
# XXX this is a highly inefficient way to generate these
# constraints. It starts to be noticeably slow when the
# form has around 20 rows. This can be done better.
labels_widgets = zip(labels, widgets)
vbox_args = [hbox(label, widget) for label, widget in labels_widgets]
if odd_child is not None:
vbox_args.append(odd_child)
constraints.append(vbox(*vbox_args))
for label, widget in labels_widgets:
# FIXME: baselines would be much better.
constraints.append(align('v_center', label, widget) | layout_strength)
return constraints
def layout_constraints(self):
""" Get the layout constraints for a Form.
A Form supplies default constraints which will arrange the
children in a two column layout. User defined 'constraints'
will be added on top of the generated form constraints.
This method cannot be overridden from Enaml syntax.
"""
children = self.visible_widgets()
labels = children[::2]
widgets = children[1::2]
n_labels = len(labels)
n_widgets = len(widgets)
if n_labels != n_widgets:
if n_labels > n_widgets:
odd_child = labels.pop()
else:
odd_child = widgets.pop()
else:
odd_child = None
# Boundary flex spacer
b_flx = spacer(0).flex()
# Inter-column flex spacer
c_flx = spacer(max(0, self.column_spacing)).flex()
# Inter-row flex spacer
r_flx = spacer(max(0, self.row_spacing)).flex()
# Generate the row constraints and make the column stacks
midline = self.midline
top = self.contents_top
left = self.contents_left
right = self.contents_right
constraints = self.constraints[:]
column1 = [top, b_flx]
column2 = [top, b_flx]
push = constraints.append
push_col1 = column1.append
push_col2 = column2.append
for label, widget in zip(labels, widgets):
push((widget.left == midline) | 'strong')
push(align('v_center', label, widget) | 'strong')
push(horizontal(left, b_flx, label, c_flx, widget, b_flx, right))
push_col1(label)
push_col1(r_flx)
push_col2(widget)
push_col2(r_flx)
# Handle the odd child and create the column constraints
if odd_child is not None:
push_col1(odd_child)
push_col2(odd_child)
push(horizontal(left, b_flx, odd_child, b_flx, right))
else:
column1.pop()
column2.pop()
bottom = self.contents_bottom
push_col1(b_flx)
push_col1(bottom)
push_col2(b_flx)
push_col2(bottom)
push(vertical(*column1))
push(vertical(*column2))
return constraints
def layout_constraints(self):
""" Get the layout constraints for a Form.
A Form supplies default constraints which will arrange the
children in a two column layout. User defined 'constraints'
will be added on top of the generated form constraints.
"""
# FIXME: do something sensible when children are not visible.
children = self.widgets()
labels = children[::2]
widgets = children[1::2]
n_labels = len(labels)
n_widgets = len(widgets)
if n_labels != n_widgets:
if n_labels > n_widgets:
odd_child = labels.pop()
else:
odd_child = widgets.pop()
else:
odd_child = None
# Boundary flex spacer
b_flx = spacer(0).flex()
# Inter-widget flex spacer
w_flx = spacer(10).flex()
# Generate the row constraints and make the column stacks
midline = self.midline
top = self.contents_top
left = self.contents_left
right = self.contents_right
constraints = self.constraints[:]
column1 = [top, b_flx]
column2 = [top, b_flx]
push = constraints.append
push_col1 = column1.append
push_col2 = column2.append
for label, widget in zip(labels, widgets):
push((widget.left == midline) | 'strong')
push(align('v_center', label, widget) | 'strong')
push(horizontal(left, b_flx, label, w_flx, widget, b_flx, right))
push_col1(label)
push_col1(w_flx)
push_col2(widget)
push_col2(w_flx)
# Handle the odd child and create the column constraints
if odd_child is not None:
push_col1(odd_child)
push_col2(odd_child)
push(horizontal(left, b_flx, odd_child, b_flx, right))
else:
column1.pop()
column2.pop()
bottom = self.contents_bottom
push_col1(b_flx)
push_col1(bottom)
push_col2(b_flx)
push_col2(bottom)
push(vertical(*column1))
push(vertical(*column2))
return constraints
