Class: DroidProj::Android::Drawable

Inherits:
Object
  • Object
show all
Defined in:
lib/droidproj/drawable.rb

Constant Summary collapse

FINAL_FILE_PREFIX = 
"x_"
SIZES = 
[:hdpi, :ldpi, :mdpi, :xhdpi]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Drawable

Returns a new instance of Drawable.



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# File 'lib/droidproj/drawable.rb', line 15

def initialize
  @active_state = {}
  @states = {}
end

Instance Attribute Details

#active_state ⇒ Object

The current state being set for this drawable



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# File 'lib/droidproj/drawable.rb', line 10

def active_state
  @active_state
end

#name ⇒ Object

The final name for this drawable, used in your code



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# File 'lib/droidproj/drawable.rb', line 8

def name
  @name
end

#states ⇒ Object

Hash of STATE_HASH =>



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# File 'lib/droidproj/drawable.rb', line 6

def states
  @states
end

Instance Method Details

#sorted_states ⇒ Object

Internal: Sort self.states by how long each state is

(because Android wants the XML file to be sorted by specificity)

Returns an Array relating to self.states as [:key, :value], sorted by :key length



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# File 'lib/droidproj/drawable.rb', line 126

def sorted_states
  keys = self.states.keys
  keys.sort_by! {|x|
    x.to_s.length
  }.reverse!
  sorted_hash = keys.map {|key|
    [key, self.states[key]]
  }
  sorted_hash
end

#state(active_state, &block) ⇒ Object

Public: The DSL for creating drawables corresponding to a certain state

active_state - The Hash of options to set the active_state &block - A block to be execute with the new active_state

Examples

drawable.state(enabled: true, focused: false) do
  # In this block, all drawables are set with the above state
  hdpi 'image.png'
end

Returns the Drawable instance being used



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# File 'lib/droidproj/drawable.rb', line 33

def state(active_state, &block)
  self.active_state = Hash[active_state.map {|k, v| [k.to_sym, v] }]
  block.call
  self.active_state = {}
  self
end

#to_size_buckets ⇒ Object 



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# File 'lib/droidproj/drawable.rb', line 81

def to_size_buckets
  size_buckets = {}
  self.states.each do |state, drawable_states|
    drawable_states.each do |drawable_state|
      size_buckets[drawable_state.size] ||= []
      size_buckets[drawable_state.size] << drawable_state
    end
  end
  size_buckets
end

#xml_string ⇒ Object

Public: The StateList XML representation of this drawable, used by Android

Returns the String representation



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# File 'lib/droidproj/drawable.rb', line 95

def xml_string
  str =
%Q{<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
}

  self.sorted_states.each do |state, drawable_states|
    drawable_states.each do |drawable_state|
      if !str.include?(drawable_state.xml_string)
        str <<
%Q{    #{drawable_state.xml_string}
}
      end
    end
  end

  default_drawable = "<item android:drawable=\"@drawable/#{FINAL_FILE_PREFIX}#{self.name}\" />\n"
  if !str.include?(default_drawable)
    str <<
%Q{    #{default_drawable}}
  end

      str <<
%Q{</selector>}
end