drawer.m

%   Authors: Alejandro R. Mosteo, Danilo Tardioli, Eduardo Montijano
%   Copyright 2018-9999 Monmostar
%   Licensed under GPLv3 https://www.gnu.org/licenses/gpl-3.0.en.html
%
% Class to encapsulate updates instead of drawing from scratch

classdef drawer < handle
    
properties
    h = []
end

methods   
    
    function delete(this) % DESTRUCTOR
        if ~isempty(this.h)
            delete(this.h);
        end
    end
    
    function bring_to_front(this)
        if ~isempty(this.h)
            uistack(this.h, 'top');
        end
    end
    
    function fill(this, ax, x, y, color, varargin)
        return
        axes(ax);
        if isempty(this.h)
            this.h = fill(x, y, color, varargin{:});
        else
            this.h.Vertices(:,1) = x;
            this.h.Vertices(:,2) = y;
            this.h.FaceColor = color;
            this.update(varargin{:});
        end
    end
    
    function plot(this, axis, x, y, varargin)
        if isempty(this.h)
            this.h = plot(axis, x, y, varargin{:});
        else
            this.h.XData = x;
            this.h.YData = y;
            this.update(varargin{:});
        end
    end
    
    function text(this, axis, x, y, txt, varargin)
        if isempty(this.h)
            this.h = text(axis, x, y, txt, varargin{:});
        else
            this.h.Position(1) = x;
            this.h.Position(2) = y;
            this.h.String = txt;
            this.update(varargin{:});
        end
    end
    
    function show(this, visible)
        if nargin < 2
            visible = true;
        end
        
        if ~isempty(this.h)
            if visible && isvalid(this.h)
                this.h.Visible = 'On';
            else
                this.h.Visible = 'Off';
            end
        end
    end
    
    function update(this, varargin)       
        for i = 1:2:numel(varargin)
            this.h.(varargin{i}) = varargin{i+1};
        end
    end
    
end
    
end