Module: Shoes::Swt::Common::Resource

Included in:
Painter, ImagePainter, TextBlock::Painter
Defined in:
shoes-swt/lib/shoes/swt/common/resource.rb

Constant Summary collapse

OPAQUE = 
255

Instance Method Summary collapse

Instance Method Details

#clip_context_to(graphics_context, element, use_parent_height = true) ⇒ Object 



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# File 'shoes-swt/lib/shoes/swt/common/resource.rb', line 32

def clip_context_to(graphics_context, element, use_parent_height = true)
  parent   = element.parent
  clipping = graphics_context.clipping
  height   = use_parent_height ? parent.height : parent.app.height

  graphics_context.set_clipping(parent.absolute_left,
                                parent.absolute_top,
                                parent.width + element.translate_left.to_i,
                                height + element.translate_top.to_i)
  yield graphics_context
ensure
  if clipping
    graphics_context.set_clipping(clipping.x, clipping.y,
                                  clipping.width, clipping.height)
  end
end

#dispose_previous_contexts ⇒ Object 



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# File 'shoes-swt/lib/shoes/swt/common/resource.rb', line 15

def dispose_previous_contexts
  @graphic_contexts ||= []
  @graphic_contexts.each { |g| g&.dispose }
  @graphic_contexts.clear
end

#reset_graphics_context(graphics_context) ⇒ Object 



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# File 'shoes-swt/lib/shoes/swt/common/resource.rb', line 9

def reset_graphics_context(graphics_context)
  dispose_previous_contexts
  set_defaults_on_context(graphics_context)
  track_graphics_context(graphics_context)
end

#set_defaults_on_context(graphics_context) ⇒ Object 



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# File 'shoes-swt/lib/shoes/swt/common/resource.rb', line 21

def set_defaults_on_context(graphics_context)
  graphics_context.set_alpha OPAQUE
  graphics_context.set_antialias(::Swt::SWT::ON)
  graphics_context.set_line_cap(::Swt::SWT::CAP_FLAT)
  graphics_context.set_transform(nil)
end

#track_graphics_context(graphics_context) ⇒ Object 



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# File 'shoes-swt/lib/shoes/swt/common/resource.rb', line 28

def track_graphics_context(graphics_context)
  @graphic_contexts << graphics_context
end