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mlreportgen.dom.ImageArea class

Package: mlreportgen.dom
Superclasses:

Define image area as hyperlink

Description

Define an area in an image to hyperlink to. When you click an image area, an HTML browser displays the target page, based on the URL or link target you specify. If the target is in the same document, clicking the link moves you to that location in the document. You can provide alternative text for screen readers that support alternative text. Create image areas in reports with PDF or HTML output. Create the image map using mlreportgen.dom.ImageMap and append areas to the map.

Construction

imageAreaObj = ImageArea() creates an empty image area.

imageAreaObj = ImageArea(target,altText,x1,y1,x2,y2) creates a rectangular image area.

imageAreaObj = ImageArea(target,altText,x,y,radius) creates a circular image area.

imageAreaObj = ImageArea(target,altText,polygonCoordinates) creates a polygonal image area.

Input Arguments

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Image area hyperlink target, specified as either:

  • URL of the page to be loaded when this image area is clicked

  • Name of a link target

Text to display if the image is not visible, specified as a character vector.

Specify relative to the top-left corner of the image.

Data Types: uint16

Specify relative to the top-left corner of the image, in pixels.

Data Types: uint16

Specify relative to the top-left corner of the image, in pixels.

Data Types: uint16

Specify relative to the top-left corner of the image, in pixels.

Data Types: uint16

Specify relative to the top-left corner of the image, in pixels.

Data Types: uint16

Specify relative to the top-left corner of the image, in pixels.

Data Types: uint16

The radius, in pixels.

Data Types: uint16

Specify an array of x and y coordinate pairs, with coordinates for each corner of the polygon, in the form [x1, y1, x2, y2, ... xN, yN]. Specify the coordinates to reflect the corners of the polygon, in sequence.

Specify each coordinate relative to the top-left corner of the image, in pixels.

Output Arguments

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Image area hyperlink, represented by an mlreportgen.dom.ImageArea object.

Properties

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Image area target, specified as either:

  • URL of the page to be loaded when this image area is clicked

  • Name of a link target

Text to display if the image is not visible, specified as a character vector.

(Read-only) Possible values are:

  • 'rect' — rectangular image area

  • 'circle' — circular image area

  • 'poly' — polygonal image area

(Read-only) The coordinates represent different kinds of points, depending on the shape of the image area. Coordinates are relative to the top-left corner of the image.

  • For a rectangle, the coordinates represent the top-left corner and the bottom-right corner.

  • For a circle, the array represents the coordinates at the center of the circle and the radius.

  • For a polygon, the coordinates represent the corners.

ID for this document element, specified as a character vector. The DOM generates a session-unique ID when it creates the document element. You can specify your own ID.

Tag for document element, specified as a character vector.

A session-unique ID is generated as part of document element creation. The generated tag has the form CLASS:ID, where CLASS is the class of the element and ID is the value of the Id property of the object. You can specify a tag to replace the generated tag.

For example, to make it easier to identify where an issue occurred during document generation, you can specify your own tag value.

Examples

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import mlreportgen.dom.*
d = Document('imageArea','pdf');

% Create a plot and save it as an image file
x = 0:pi/100:2*pi;
y = sin(x);
plot(x,y);
annotation('textbox', [0.2,0.4,0.1,0.1],...
           'string', 'Help on plot function');
saveas(gcf,'plot_img.png');

% Create the DOM image object and append it to your document
plot1 = Image('plot_img.png');
append(d,plot1);

% Define the area and link target using ImageArea
target = ['http://www.mathworks.com/help/matlab/ref/' ...
'plot.html?searchHighlight=plot'];
area1 = ImageArea( target, ...
'plot function help',160,340,383,392);

% Create the image map object and append the area to it
map = ImageMap();
append(map,area1);
plot1.Map = map;

close(d);
rptview(d.OutputPath);
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