gusucode.com > 电子数字钟源码程序 > 电子数字钟源码程序/sevenSegmentDisplay.m
classdef sevenSegmentDisplay < handle
%% SEVENSEGMENTDISPLAY is a container for seven segment objects, three
% horizontal segments and four vertical segments.
%
% Syntax:
%
% seg = SEVENSEGMENTDISPLAY;
% seg = SEVENSEGMENTDISPLAY(NUM);
% seg = SEVENSEGMENTDISPLAY(X, Y);
% seg = SEVENSEGMENTDISPLAY(X, Y, NUM);
%
%
% Description:
%
% seg = SEVENSEGMENTDISPLAY defaults the number displayed to 0 and
% the x and y locations of the top left corner of the
% sevenSegmentDisplay's matrix to (0, 0).
%
% seg = SEVENSEGMENTDISPLAY(NUM) sets the number displayed to NUM and
% defaults the x and y locations of the top left corner of the
% sevenSegmentDisplay's matrix to (0, 0).
%
% seg = SEVENSEGMENTDISPLAY(X, Y) defaults the number displayed to 0
% and sets the x and y locations of the top left corner of the
% sevenSegmentDisplay's matrix to (X, Y).
%
% seg = SEVENSEGMENTDISPLAY(X, Y, NUM) sets the number displayed to NUM
% and sets the x and y locations of the top left corner of the
% sevenSegmentDisplay's matrix to (X, Y).
%
%
% Copyright James Kristoff 2012
%
% see also: CLOCKSEGMENT, HORSEGMENT, VERTSEGMENT, DIGICLOCK
%% Properties of a seven segment display
%These properties are protected, and cannot be accessed outside of this
%class
properties (Access = protected)
rows %number of rows in sevenSegmentDisplay's matrix
cols %number of columns in sevenSegmentDisplay's matrix
sevSegDispMatrix %a matrix to be filled, then shown with IMSHOW
hSevSegDisp %a handle to the figure of the sevenSegmentDisplay
black %a value of 255, used to normalize clockMatrix
end
%These properties are public, and can be accessed outside the class.
%They are also observable, which means they can be watched by a
% listener function.
properties (Access = public, SetObservable = true)
topLeftX %X location of the top left corner
% of the sevSegDispMatrix
topLeftY %Y location of the top left corner
% of the sevSegDispMatrix
horSegments %vector containing horSegment objects
vertSegments %vector containing vertSegment objects
number %number to be displayed
end
%% Custom events to be listened for by the class
events
parentClosed
end
%% Member functions for the class
methods
function obj = sevenSegmentDisplay(varargin)
%Default constructor for the class
%handle is null until an image is created with IMSHOW
obj.hSevSegDisp = [];
%Initialize Display Segment Locations
%
% borderHeight = 2;
% gap = 1;
% horSegHeight = 5;
% horSegLength = 15;
% vertSegHeight = 15;
% vertSegLength = 5;
%
obj.horSegments = horSegment ( 5, 2);
obj.horSegments (2) = horSegment ( 5, 18);
obj.horSegments (3) = horSegment ( 5, 34);
obj.vertSegments = vertSegment( 2, 5);
obj.vertSegments(2) = vertSegment(18, 5);
obj.vertSegments(3) = vertSegment( 2, 21);
obj.vertSegments(4) = vertSegment(18, 21);
%set the row and column size for the sevenSegmentDisplay's
% matrix
setDims(obj);
%set black to 255
obj.black = 255;
%switch statement to parse inputs
switch nargin
case 0 %if nothing is passed then set values to default
obj.number = 0;
obj.topLeftX = 0;
obj.topLeftY = 0;
case 1 %for one input expect a number
obj.number = varargin{1};
obj.topLeftX = 0;
obj.topLeftY = 0;
case 2 %for two inputs expect x and y values
obj.topLeftX = varargin{1};
obj.topLeftY = varargin{2};
obj.number = 0;
case 3 %for three inputs expect x, y, and then a number
obj.topLeftX = varargin{1};
obj.topLeftY = varargin{2};
obj.number = varargin{3};
otherwise %otherwise put out an error
error('Between 0 and 3 inputs allowed');
end
%initializes and fills the sevenSegmentDisplays's matrix with
% color
reInit(obj);
%begins listening for different events to which it will react
addlistener(obj,'parentClosed', @parentClosedFcn);
addlistener(obj,'number', 'PostSet', @obj.postSetNumberFcn);
end
function rows = getRows(obj)
%get the number of rows
rows = obj.rows;
end
function cols = getCols(obj)
%get the number of columns
cols = obj.cols;
end
function mat = getMat(obj)
%get the sevenSegmentDisplay's Matrix
mat = obj.sevSegDispMatrix;
end
function setDims(obj)
%set the number of rows and columns
if(isempty(obj.rows))
obj.rows = 39;
obj.cols = 23;
end
end
function parentClosedFcn(obj, ~,~,~)
%when the parent object is closed set the handle to null
obj.hSevSegDisp = [];
end
function notifyCloseParent(obj,~,~)
%function necessary for custom event?
notify(obj, 'parentClosed')
closereq
end
function postSetNumberFcn(obj,~,~)
%after obj.number is changed update the sevenSegmentDisplay's image
reInit(obj);
end
function disp(obj)
%overload the DISP function to display what we want for this object
tmpStr1 = 'The number is: %i,\n';
tmpStr2 = 'The display is located at: (%i, %i)\n';
fprintf(1, ...
[tmpStr1 tmpStr2], ...
obj.number, ...
obj.topLeftX, ...
obj.topLeftY);
end
function display(obj) %gets rid of a = at top...
%overload DISPLAY function
disp(obj)
end
function set.number(obj, value)
%overloaded set function for status property
%Check if value is between 0 and 9
if (value < 0 || value > 9)
warning('MATLAB:paramAmbiguous',...
'only integers from 0 - 9 allowed, not changed');
else
%Set the segments' statuses to show nummber given
switch value
case 0
obj.horSegments (1).status = true; %#ok<*MCSUP>
obj.horSegments (2).status = false;
obj.horSegments (3).status = true;
obj.vertSegments(1).status = true;
obj.vertSegments(2).status = true;
obj.vertSegments(3).status = true;
obj.vertSegments(4).status = true;
case 1
obj.horSegments (1).status = false;
obj.horSegments (2).status = false;
obj.horSegments (3).status = false;
obj.vertSegments(1).status = false;
obj.vertSegments(2).status = true;
obj.vertSegments(3).status = false;
obj.vertSegments(4).status = true;
case 2
obj.horSegments (1).status = true;
obj.horSegments (2).status = true;
obj.horSegments (3).status = true;
obj.vertSegments(1).status = false;
obj.vertSegments(2).status = true;
obj.vertSegments(3).status = true;
obj.vertSegments(4).status = false;
case 3
obj.horSegments (1).status = true;
obj.horSegments (2).status = true;
obj.horSegments (3).status = true;
obj.vertSegments(1).status = false;
obj.vertSegments(2).status = true;
obj.vertSegments(3).status = false;
obj.vertSegments(4).status = true;
case 4
obj.horSegments (1).status = false;
obj.horSegments (2).status = true;
obj.horSegments (3).status = false;
obj.vertSegments(1).status = true;
obj.vertSegments(2).status = true;
obj.vertSegments(3).status = false;
obj.vertSegments(4).status = true;
case 5
obj.horSegments (1).status = true;
obj.horSegments (2).status = true;
obj.horSegments (3).status = true;
obj.vertSegments(1).status = true;
obj.vertSegments(2).status = false;
obj.vertSegments(3).status = false;
obj.vertSegments(4).status = true;
case 6
obj.horSegments (1).status = true;
obj.horSegments (2).status = true;
obj.horSegments (3).status = true;
obj.vertSegments(1).status = true;
obj.vertSegments(2).status = false;
obj.vertSegments(3).status = true;
obj.vertSegments(4).status = true;
case 7
obj.horSegments (1).status = true;
obj.horSegments (2).status = false;
obj.horSegments (3).status = false;
obj.vertSegments(1).status = false;
obj.vertSegments(2).status = true;
obj.vertSegments(3).status = false;
obj.vertSegments(4).status = true;
case 8
obj.horSegments (1).status = true;
obj.horSegments (2).status = true;
obj.horSegments (3).status = true;
obj.vertSegments(1).status = true;
obj.vertSegments(2).status = true;
obj.vertSegments(3).status = true;
obj.vertSegments(4).status = true;
case 9
obj.horSegments (1).status = true;
obj.horSegments (2).status = true;
obj.horSegments (3).status = false;
obj.vertSegments(1).status = true;
obj.vertSegments(2).status = true;
obj.vertSegments(3).status = false;
obj.vertSegments(4).status = true;
otherwise
obj.horSegments (1).status = false;
obj.horSegments (2).status = false;
obj.horSegments (3).status = false;
obj.vertSegments(1).status = false;
obj.vertSegments(2).status = false;
obj.vertSegments(3).status = false;
obj.vertSegments(4).status = false;
warning('MATLAB:paramAmbiguous',...
'Something went wrong setting a number\n');
end
obj.number = value;
end
%reinitialize
reInit(obj);
end
function imshow(obj)
%overload IMSHOW function to show the sevenSegmentDisplay's matrix
%if the image has not been created yet set the handle
if isempty(obj.hSevSegDisp)
obj.hSevSegDisp = imshow(obj.sevSegDispMatrix./obj.black);
set(gcf,'closeRequestFcn',@obj.notifyCloseParent);
set(gca,'DeleteFcn' ,@obj.notifyCloseParent);
else %isHandle because it exists...
if ishandle(obj.hSevSegDisp)
%update the images data
set(obj.hSevSegDisp, 'CData', obj.sevSegDispMatrix...
./obj.black);
else
%Do nothing (it was ploted but has since disappeared)
obj.hSevSegDisp = [];
end
end
end
function reInit(obj)
%refills the matrix then shows the updated image
populateDisplay(obj);
%if the handle is not empty refresh the image
if ~isempty(obj.hSevSegDisp)
imshow(obj);
end
end
function populateDisplay(obj)
%fills the sevenSegmentDisplay with it's seven segments
%initialize segment to a black rectangle
obj.sevSegDispMatrix = zeros (obj.rows,obj.cols,3);
%fills sevenSegmentDisplay with the segments
for i = 1:size(obj.vertSegments,2)
obj.sevSegDispMatrix(obj.vertSegments(i).topLeftY: ...
(obj.vertSegments(i).topLeftY ...
+ obj.vertSegments(i).getRows() - 1),...
obj.vertSegments(i).topLeftX: ...
(obj.vertSegments(i).topLeftX ...
+ obj.vertSegments(i).getCols() - 1),...
:) ...
= ...
(obj.sevSegDispMatrix(obj.vertSegments(i).topLeftY: ...
(obj.vertSegments(i).topLeftY ...
+ obj.vertSegments(i).getRows() - 1),...
obj.vertSegments(i).topLeftX: ...
(obj.vertSegments(i).topLeftX ...
+ obj.vertSegments(i).getCols() - 1),...
:) ...
+ obj.vertSegments(i).getMat());
end
for i = 1:size(obj.horSegments,2)
obj.sevSegDispMatrix(obj.horSegments(i).topLeftY: ...
(obj.horSegments(i).topLeftY ...
+ obj.horSegments(i).getRows() - 1), ...
obj.horSegments(i).topLeftX: ...
(obj.horSegments(i).topLeftX ...
+ obj.horSegments(i).getCols() - 1), ...
:) ...
= ...
(obj.sevSegDispMatrix(obj.horSegments(i).topLeftY: ...
(obj.horSegments(i).topLeftY ...
+ obj.horSegments(i).getRows() - 1), ...
obj.horSegments(i).topLeftX: ...
(obj.horSegments(i).topLeftX ...
+ obj.horSegments(i).getCols() - 1), ...
:) ...
+ obj.horSegments(i).getMat());
end
end
end
end