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Draw Mask Icon

You can create icons that update when you change the mask parameters to reflect the purpose of the block. This example shows how to use drawing commands to create a mask icon.

Draw Static Icon

A static mask icon remains unchanged, independent of the value of the mask parameters.

  1. Right-click the masked block that requires the icon and select Mask > Edit Mask.

  2. In the Icons & Ports tab, enter this command in the Icon Drawing commands pane:

    % Use specified image as mask icon
    image('engine.jpg')

    The image file must be on the MATLAB® path.

    For more examples of drawing command syntax, see Icon drawing commands.

    Images in formats .cur, .hdf4, .ico, .pcx, .ras, .xwd, .svg (full version) cannot be used as block mask images. However, you can use images in these formats if you wrap the file name in the imread() function and use the RGB triplet. Using the imread() function is not efficient. However, it is still supported for backward compatibility.

Draw Dynamic Icon

A dynamic icon changes with the values of the mask parameters. Use it to represent the purpose of the masked block.

  1. Right-click the masked block that requires the icon and select Mask > Edit Mask.

    The Mask Editor opens.

  2. In the Icons & Ports tab, enter this command in the Icon Drawing commands pane:

    pos = get_param(gcb, 'Position');
    width = pos(3) - pos(1);
    x = [0, width];
    y = m*x + b;
    % Parameters 'm' and 'b' must be defined in 'Parameters & Dialog' pane.
    plot(x,y)

  3. Under Options, set Icon Units to Pixels.

    The drop-down lists under Options allow you to specify icon frame visibility, icon transparency, drawing context, icon rotation, and port rotation.

  4. Click Apply. To view the icon generated, see model masking_example.

      Note:   If Simulink® cannot evaluate all commands in the Icon Drawing commands pane to generate an icon, three question marks (? ? ?) appear on the mask.

See slexMaskDisplayAndInitializationExample for more examples of icon drawing commands. This model shows how to draw:

  • Static mask

  • Dynamic shape mask

  • Dynamic text mask

  • Image mask

See Also

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