Class: MotionKit::PointConstraint
Constant Summary
Constants inherited
from Constraint
Constraint::Attributes, Constraint::Priorities, Constraint::Relationships
Instance Attribute Summary
Attributes inherited from Constraint
#attribute, #attribute2, #constant, #identifier, #multiplier, #priority, #relationship, #relative_to, #target
Instance Method Summary
collapse
#initialize
Methods inherited from Constraint
#<=, #==, #>=, #activate, #active, #active=, attribute_lookup, attribute_reverse, axis_lookup, calculate?, #common_ancestor, constant?, #deactivate, #equals, #gte, #initialize, #is, #lte, #of, orientation_lookup, priority_lookup, relationship_lookup, relationship_reverse, view_lookup
Instance Method Details
#constant=(constant) ⇒ Object
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# File 'lib/motion-kit-cocoa/constraints/point_constraint.rb', line 6
def constant=(constant)
if constant.is_a?(Array)
@constant = constant[0..1]
elsif constant.is_a?(Hash)
@constant = [0, 0]
if constant.key?(:x)
@constant[0] = constant[:x]
end
if constant.key?(:y)
@constant[1] = constant[:y]
end
else
@constant = [constant, constant]
end
self.relative_to ||= :superview
self.update_constraint
end
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#divided_by(multiplier) ⇒ Object
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# File 'lib/motion-kit-cocoa/constraints/point_constraint.rb', line 126
def divided_by(multiplier)
if multiplier.is_a?(Array)
self.multiplier[0] /= multiplier[0].to_f
self.multiplier[1] /= multiplier[1].to_f
elsif multiplier.is_a?(Hash)
if multiplier.key?(:x)
self.multiplier[0] /= multiplier[:x].to_f
end
if multiplier.key?(:y)
self.multiplier[1] /= multiplier[:y].to_f
end
else
self.multiplier[0] /= multiplier.to_f
self.multiplier[1] /= multiplier.to_f
end
self.update_constraint
self
end
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#minus(constant) ⇒ Object
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# File 'lib/motion-kit-cocoa/constraints/point_constraint.rb', line 76
def minus(constant)
if constant.is_a?(Array)
self.constant[0] -= constant[0]
self.constant[1] -= constant[1]
elsif constant.is_a?(Hash)
if constant.key?(:x)
self.constant[0] -= constant[:x]
elsif constant.key?(:right)
self.constant[0] -= constant[:right]
elsif constant.key?(:left)
self.constant[0] += constant[:left]
end
if constant.key?(:y)
self.constant[1] -= constant[:y]
elsif constant.key?(:up)
self.constant[1] -= constant[:up]
elsif constant.key?(:down)
self.constant[1] += constant[:down]
end
else
self.constant[0] -= constant
self.constant[1] -= constant
end
self.update_constraint
self
end
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#multiplier=(multiplier) ⇒ Object
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# File 'lib/motion-kit-cocoa/constraints/point_constraint.rb', line 27
def multiplier=(multiplier)
if multiplier.is_a?(Array)
@multiplier = multiplier[0..1]
elsif multiplier.is_a?(Hash)
@multiplier = [0, 0]
if multiplier.key?(:x)
@multiplier[0] = multiplier[:x]
end
if multiplier.key?(:y)
@multiplier[1] = multiplier[:y]
end
else
@multiplier = [multiplier, multiplier]
end
self.update_constraint
end
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#plus(constant) ⇒ Object
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# File 'lib/motion-kit-cocoa/constraints/point_constraint.rb', line 47
def plus(constant)
if constant.is_a?(Array)
self.constant[0] += constant[0]
self.constant[1] += constant[1]
elsif constant.is_a?(Hash)
if constant.key?(:x)
self.constant[0] += constant[:x]
elsif constant.key?(:right)
self.constant[0] += constant[:right]
elsif constant.key?(:left)
self.constant[0] -= constant[:left]
end
if constant.key?(:y)
self.constant[1] += constant[:y]
elsif constant.key?(:up)
self.constant[1] += constant[:up]
elsif constant.key?(:down)
self.constant[1] -= constant[:down]
end
else
self.constant[0] += constant
self.constant[1] += constant
end
self.update_constraint
self
end
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#resolve_all(layout, view) ⇒ Object
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# File 'lib/motion-kit-cocoa/constraints/point_constraint.rb', line 156
def resolve_all(layout, view)
@resolved ||= begin
item = Constraint.view_lookup(layout, view, self.target)
rel_item = Constraint.view_lookup(layout, view, self.relative_to)
relationship = Constraint.relationship_lookup(self.relationship)
[0, 1].map do |index|
attribute = Constraint.attribute_lookup(self.attribute[index])
mul = self.multiplier[index]
const = self.constant[index]
nsconstraint = NSLayoutConstraint.constraintWithItem(item,
attribute: attribute,
relatedBy: relationship,
toItem: rel_item,
attribute: attribute,
multiplier: mul,
constant: const
)
if self.priority
nsconstraint.priority = Constraint.priority_lookup(self.priority)
end
if self.identifier
nsconstraint.setIdentifier(self.identifier)
end
nsconstraint
end
end
end
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#times(multiplier) ⇒ Object
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# File 'lib/motion-kit-cocoa/constraints/point_constraint.rb', line 105
def times(multiplier)
if multiplier.is_a?(Array)
self.multiplier[0] *= multiplier[0]
self.multiplier[1] *= multiplier[1]
elsif multiplier.is_a?(Hash)
if multiplier.key?(:x)
self.multiplier[0] *= multiplier[:x]
end
if multiplier.key?(:y)
self.multiplier[1] *= multiplier[:y]
end
else
self.multiplier[0] *= multiplier
self.multiplier[1] *= multiplier
end
self.update_constraint
self
end
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#update_constraint ⇒ Object
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# File 'lib/motion-kit-cocoa/constraints/point_constraint.rb', line 147
def update_constraint
if @resolved
[0, 1].each do |index|
constraint = @resolved[index]
constraint.constant = self.constant[index]
end
end
end
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