def constrain_to_scrollview(self, widget):
# The scrollview should know the content size as long as the
# view contained has an intrinsic size and the constraints are
# not ambiguous in any axis.
view = widget.native
leading_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
view,
NSLayoutAttributeLeading,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeLeading,
1.0,
0
)
trailing_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.native,
NSLayoutAttributeTrailing,
NSLayoutRelationEqual,
view,
NSLayoutAttributeTrailing,
1.0,
0
)
top_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
view,
NSLayoutAttributeTop,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeTop,
1.0,
0
)
bottom_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.native,
NSLayoutAttributeBottom,
NSLayoutRelationEqual,
view,
NSLayoutAttributeBottom,
1.0,
0
)
self.native.addConstraints_([
leading_constraint,
trailing_constraint,
top_constraint,
bottom_constraint
])
def constrain_placeholder_label(self):
leading_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.placeholder_label,
NSLayoutAttributeLeading,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeLeading,
1.0,
4.0
)
trailing_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.placeholder_label,
NSLayoutAttributeTrailing,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeTrailing,
1.0,
0
)
top_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.placeholder_label,
NSLayoutAttributeTop,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeTop,
1.0,
8.0
)
bottom_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.placeholder_label,
NSLayoutAttributeBottom,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeBottom,
1.0,
0
)
self.native.addConstraints_([
leading_constraint,
trailing_constraint,
top_constraint,
bottom_constraint
])
def constrain_placeholder_label(self):
leading_constraint = NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.placeholder_label,
NSLayoutAttributeLeading,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeLeading,
1.0,
4.0
)
trailing_constraint = NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.placeholder_label,
NSLayoutAttributeTrailing,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeTrailing,
1.0,
0
)
top_constraint = NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.placeholder_label,
NSLayoutAttributeTop,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeTop,
1.0,
8.0
)
bottom_constraint = NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.placeholder_label,
NSLayoutAttributeBottom,
NSLayoutRelationEqual,
self.native,
NSLayoutAttributeBottom,
1.0,
0
)
self.native.addConstraints_([
leading_constraint,
trailing_constraint,
top_constraint,
bottom_constraint
])
def container(self, value):
self._container = value
# print("Add constraints for", self.widget, 'in', self.container, self.widget.interface.layout)
self.left_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.widget.native, NSLayoutAttributeLeft,
NSLayoutRelationEqual,
self.container.native, NSLayoutAttributeLeft,
1.0, 10 # Use a dummy, non-zero value for now
)
self.container.native.addConstraint_(self.left_constraint)
self.top_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.widget.native, NSLayoutAttributeTop,
NSLayoutRelationEqual,
self.container.native, NSLayoutAttributeTop,
1.0, 5 # Use a dummy, non-zero value for now
)
self.container.native.addConstraint_(self.top_constraint)
self.width_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.widget.native, NSLayoutAttributeRight,
NSLayoutRelationEqual,
self.widget.native, NSLayoutAttributeLeft,
1.0, 50 # Use a dummy, non-zero value for now
)
self.container.native.addConstraint_(self.width_constraint)
self.height_constraint = \
NSLayoutConstraint.constraintWithItem_attribute_relatedBy_toItem_attribute_multiplier_constant_(
self.widget.native, NSLayoutAttributeBottom,
NSLayoutRelationEqual,
self.widget.native, NSLayoutAttributeTop,
1.0, 30 # Use a dummy, non-zero value for now
)
self.container.native.addConstraint_(self.height_constraint)