Class: MotionPrime::LabelDrawElement

Inherits:
DrawElement show all
Includes:
DrawBackgroundMixin, ElementContentTextMixin, ElementTextMixin
Defined in:
motion-prime/elements/draw/label.rb

Instance Attribute Summary

Attributes inherited from BaseElement

#name, #options, #screen, #section, #styles, #view, #view_class, #view_name

Instance Method Summary collapse

Methods included from DrawBackgroundMixin

#draw_background_in_context, #draw_rect_in_context

Methods included from ElementTextMixin

#attributed_string, #extract_attributed_string_options, #html_string

Methods included from ElementContentTextMixin

#attributed_text?, #attributed_text_for_text, #cached_content_height, #cached_content_width, #content_font, #content_height, #content_text, #content_width, #current_attributed_text, #height_for_attributed_text, #height_for_text, #multiline_content_width, #width_for_attributed_text, #width_for_text

Methods inherited from DrawElement

#bind_gesture, #computed_frame, factory, #hide, #on_container_render, #render!, #rerender!, #show, #view

Methods included from ElementContentPaddingMixin

#cached_content_outer_height, #cached_content_outer_width, #content_outer_height, #content_outer_width, #content_padding_bottom, #content_padding_height, #content_padding_left, #content_padding_right, #content_padding_top, #content_padding_width

Methods included from FrameCalculatorMixin

#calculate_frame_for

Methods inherited from BaseElement

#add_target, after_render, before_render, #bind_gesture, #cell_element?, #cell_section?, #compute_options!, #computed_options, #dealloc, factory, #hide, #initialize, #notify_section_after_render, #notify_section_before_render, #reload!, #render, #render!, #rerender!, #show, #update, #update_options, #update_with_options

Methods included from HasClassFactory

#camelize_factory, #class_factory, #low_camelize_factory, #underscore_factory

Methods included from HasStyleOptions

#extract_font_from

Methods included from HasStyleChainBuilder

#build_styles_chain

Methods included from HasNormalizer

#debug_info, #element?, #normalize_object, #normalize_options, #normalize_value

Constructor Details

This class inherits a constructor from MotionPrime::BaseElement

Instance Method Details

#default_padding_for(side) ⇒ Object 



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# File 'motion-prime/elements/draw/label.rb', line 89

def default_padding_for(side)
  return super unless side.to_s == 'top'
  @padding_top || 0
end

#draw_in(rect) ⇒ Object 



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# File 'motion-prime/elements/draw/label.rb', line 44

def draw_in(rect)
  super
  draw_in_context(UIGraphicsGetCurrentContext())
end

#draw_in_context(context) ⇒ Object

using hack for bug described here: stackoverflow.com/questions/19232850/nsattributedstring-drawinrect-disappears-when-the-frame-is-offset TODO: check it in iOS 7.1 and remove CGContext manuplations (pass innerRect/topLeftCorner) if fixed



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# File 'motion-prime/elements/draw/label.rb', line 51

def draw_in_context(context)
  return if computed_options[:hidden]
  size_to_fit_if_needed
  set_text_position

  draw_background_in_context(context)

  UIGraphicsPushContext(context)
  options = draw_options
  if options.slice(:is_html, :line_spacing, :line_height, :underline, :force_attributed, :fragment_color, :fragment_font).any?
    prepared_text = options[:is_html] ? html_string(options) : attributed_string(options)

    CGContextSaveGState(context)
    if options[:inner_rect]
      rect = options[:inner_rect]
      CGContextTranslateCTM(context, *rect.origin.to_a)
      prepared_text.drawInRect(CGRectMake(0, 0, *rect.size.to_a))
    else
      CGContextTranslateCTM(context, *options[:top_left_corner].to_a)
      prepared_text.drawAtPoint(CGPointMake(0, 0))
    end
    CGContextRestoreGState(context)
  else
    # regular string
    prepared_text = options[:text]
    options[:text_color].set
    if options[:inner_rect]
      prepared_text.drawInRect(options[:inner_rect],
        withFont: options[:font],
        lineBreakMode: options[:line_break_mode],
        alignment: options[:text_alignment])
    else
      prepared_text.drawAtPoint(options[:top_left_corner], withFont: options[:font])
    end
  end
  UIGraphicsPopContext()
end

#draw_options ⇒ Object 



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# File 'motion-prime/elements/draw/label.rb', line 8

def draw_options
  options = computed_options
  text = (options[:html] || options[:text]).to_s.gsub(/\A[\n\r]+/, '')
  text_color = (options[:text_color] || :black).uicolor
  font = (extract_font_from(options) || :system).uifont

  text_alignment_name = options.fetch(:text_alignment, :left)
  text_alignment = text_alignment_name.nstextalignment

  default_break_mode = options[:size_to_fit] ? :word_wrap : :tail_truncation
  line_break_mode_name = options.fetch(:line_break_mode, default_break_mode)
  line_break_mode = line_break_mode_name.uilinebreakmode

  top_left_corner = CGPointMake(frame_inner_left, frame_inner_top)
  if options[:number_of_lines].to_i.zero?
    inner_rect = CGRectMake(*top_left_corner.to_a, frame_width, frame_height)
  end
  super.merge({
    text: text,
    is_html: options[:html].present?,
    text_color: text_color,
    font: font,
    text_alignment_name: text_alignment_name,
    text_alignment: text_alignment,
    line_break_mode_name: line_break_mode_name,
    line_break_mode: line_break_mode,
    line_spacing: options[:line_spacing],
    line_height: options[:line_height],
    underline: options[:underline],
    fragment_color: options[:fragment_color],
    fragment_font: options[:fragment_font],
    top_left_corner: top_left_corner,
    inner_rect: inner_rect
  })
end

#original_options ⇒ Object 



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# File 'motion-prime/elements/draw/label.rb', line 120

def original_options
  @_original_options ||= computed_options.clone
end

#set_text_position ⇒ Object 



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# File 'motion-prime/elements/draw/label.rb', line 108

def set_text_position
  # FIXME: there is a bug when overriding this method for custom fonts (adjust @padding_top), you must set 'padding' to 0
  if original_options.slice(:padding_top, :padding_bottom, :padding, :size_to_fit).values.none?
    computed_options[:width] ||= frame_width
    frame_height = computed_options[:height] || frame_outer_height
    content_height = cached_content_height
    content_height = frame_height if content_height > frame_height
    @padding_top = (frame_height - content_height)/2
    # @padding_top += 1 unless @padding_top.zero?
  end
end

#size_to_fit_if_needed ⇒ Object 



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# File 'motion-prime/elements/draw/label.rb', line 94

def size_to_fit_if_needed
  if original_options[:size_to_fit]
    computed_options[:width] = cached_content_outer_width unless original_options[:width]
    computed_options[:height] = cached_content_outer_height unless original_options[:height]
    reset_computed_values
  elsif !original_options[:width] && (!original_options[:left] || !original_options[:right])
    computed_options[:width] = cached_content_outer_width unless original_options[:width]
    reset_computed_values
  elsif original_options.slice(:height, :top, :bottom).values.none?
    computed_options[:height] = cached_content_outer_height unless original_options[:height]
    reset_computed_values
  end
end