BackgroundWithBorder

BorderInsideBox CalcBorderBox CalcInsidePart CalcOpaqueBox Draw DrawBackground

Attributes

Border

Fields

Define Class BackgroundWithBorder;
    mixes in with Viewable;

    // note: if you inherit from BackgroundWithBorder, you must call DrawBackground from your Draw method (otherwise OpaqueBox is wrong)

    attribute Border: Border, readOnly;
        // return border (default to no border)

    // drawing

    overrides Draw;
        // call DrawBackground
    operation DrawBackground();
        // fill content with content color, draw border, and shadow

    // geometry and hit testing

    operation BorderInsideBox(var insideBorder: Box);
        // return inherited border box; override to control where border is drawn
    overrides CalcBorderBox;
        // return outer edge of border (border inside box outset by border Thickness)
    overrides CalcInsidePart;
        // return partContent if probe is in the content, partBorder if probe is on the border
    overrides CalcOpaqueBox;
        // return content if opaque
end class;