Class: WhirledPeas::Graphics::GridPainter

Inherits:
ContainerPainter
  • Object
show all
Defined in:
lib/whirled_peas/graphics/grid_painter.rb

Constant Summary

Constants inherited from ContainerPainter

ContainerPainter::PADDING

Instance Method Summary collapse

Instance Method Details

#dimensions ⇒ Object 



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# File 'lib/whirled_peas/graphics/grid_painter.rb', line 29

def dimensions
  @dimensions ||= begin
    num_cols = settings.num_cols
    num_rows = (num_children.to_f / num_cols).ceil
    content_width = 0
    each_child do |child|
      if child.dimensions.outer_width > content_width
        content_width = child.dimensions.outer_width
      end
    end
    content_height = 0
    each_child do |child|
      if child.dimensions.outer_height > content_height
        content_height = child.dimensions.outer_height
      end
    end
    ContainerDimensions.new(
      settings, content_width, content_height, num_cols, num_rows
    )
  end
end

#paint(canvas, left, top, &block) ⇒ Object 



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# File 'lib/whirled_peas/graphics/grid_painter.rb', line 7

def paint(canvas, left, top, &block)
  super
  return unless canvas.writable?
  each_child.with_index do |child, index|
    col_index, row_index = grid_cell(index)
    left_offset, _ = horiz_justify_offset(child.dimensions.outer_width)
    top_offset, _ = vert_justify_offset(child.dimensions.outer_height)
    child_canvas = canvas.child(
      coords(left, top).content_left(col_index) + left_offset,
      coords(left, top).content_top(row_index) + top_offset,
      [dimensions.content_width, child.dimensions.outer_width].min,
      [dimensions.content_height, child.dimensions.outer_height].min
    )
    child.paint(
      child_canvas,
      coords(left, top).content_left(col_index) + left_offset,
      coords(left, top).content_top(row_index) + top_offset,
      &block
    )
  end
end