wtools 0.2.20

Collection of general purpose tools for solving problems. Fundamentally extend the language without spoiling, so may be used solely or in conjunction with another module of such kind.
Documentation 
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/// Internal namespace.
pub( crate ) mod private
{
  use crate::protected::*;

  /// Command to draw rectangle.
  #[ allow( dead_code ) ]
  #[ derive( Debug, Clone ) ]
  pub struct RectChanger
  {
    /// Id.
    pub( crate ) id : Id,
    /// Draw changer.
    pub( crate ) draw : DrawChanger,
  }

  impl RectChanger
  {

    /// Constructor.
    #[ inline ]
    pub fn _new( draw : DrawChanger ) -> Self
    {
      let id = Id::new::< Self >();
      let change = RectChangeNew::new( id );
      let mut result = Self{ id, draw };
      change.add_to( &mut result );
      result
    }

    /// ChangeInterface region.
    #[ inline ]
    pub fn region( mut self, left_top : X2< f32 >, right_bottom : X2< f32 > ) -> Self
    {
      let change = RectChangeRegion::new( self.id() ).region( left_top, right_bottom );
      self.change_add( change );
      self
    }

    /// Get back to draw.
    #[ inline ]
    pub fn draw( self ) -> DrawChanger
    {
      self.draw
    }

    /// Get back to context.
    #[ inline ]
    pub fn context( self ) -> ContextChanger
    {
      self.draw.context_changer
    }

  }

  impl ChangerInterface for RectChanger
  {

    type Parent = DrawChanger;
    type Root = ContextChanger;

    fn context( self ) -> Self::Root
    {
      self.draw.context_changer
    }

    fn parent( &mut self ) -> &mut Self::Parent
    {
      &mut self.draw
    }

    fn end( self ) -> Self::Parent
    {
      self.draw
    }

  }

  impl HasIdInterface for RectChanger
  {
    #[ inline ]
    fn id( &self ) -> Id
    {
      self.draw.id()
    }
  }

}

crate::mod_interface!
{
  exposed use RectChanger;
}