Examples of java.awt.geom.Area.subtract()

java.awt.geom.Area.subtract()
ple: Area a1 = new Area([triangle 0,0 => 8,0 => 0,8]); Area a2 = new Area([triangle 0,0 => 8,0 => 8,8]); a1.subtract(a2); a1(before) - a2 = a1(after) ################ ################ ############## ############## ## ############ ############ #### ########## ########## ###### ######## ######## ######## ###### ###### ###### #### #### #### ## ## ## @param rhs the Area to be subtracted from the current shape @throws NullPointerException if rhs is null @since 1.2

                // complement of the ROI within the image bounds.
                if(srcROI != null) {
                    Area oldInvalidArea = new Area(getBounds());
                    Shape roiShape = srcROI.getAsShape();
                    if(roiShape != null) {
                        oldInvalidArea.subtract(new Area(roiShape));
                    } else {
                        Rectangle oldInvalidBounds =
                            oldInvalidArea.getBounds();
                        LinkedList rectList =
                            srcROI.getAsRectangleList(oldInvalidBounds.x,

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                                                      oldInvalidBounds.y,
                                                      oldInvalidBounds.width,
                                                      oldInvalidBounds.height);
                        Iterator it = rectList.iterator();
                        while(it.hasNext() && !oldInvalidArea.isEmpty()) {
                            oldInvalidArea.subtract(new Area((Rectangle)it.next()));
                        }
                    }
                    oldInvalidRegion = oldInvalidArea;
                }

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      area.subtract(new Area(new Rectangle(5, y + height, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 5, y + height, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 3, y + height - 1, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + 2, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + height - 2, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + 3, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + height - 3, 1, 1)));
      area.subtract(new Area(new Rectangle(width, y + 5, 1, 1)));
      area.subtract(new Area(new Rectangle(width, y + height - 5, 1, 2)));
      // Add in the triangle piece for the balloon.
      if (vpos == VPOS_BELOW) {

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      area.subtract(new Area(new Rectangle(width - 5, y + height, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 3, y + height - 1, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + 2, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + height - 2, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + 3, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + height - 3, 1, 1)));
      area.subtract(new Area(new Rectangle(width, y + 5, 1, 1)));
      area.subtract(new Area(new Rectangle(width, y + height - 5, 1, 2)));
      // Add in the triangle piece for the balloon.
      if (vpos == VPOS_BELOW) {
        if (hpos == HPOS_LEFT) {

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      area.subtract(new Area(new Rectangle(width - 3, y + height - 1, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + 2, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + height - 2, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + 3, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + height - 3, 1, 1)));
      area.subtract(new Area(new Rectangle(width, y + 5, 1, 1)));
      area.subtract(new Area(new Rectangle(width, y + height - 5, 1, 2)));
      // Add in the triangle piece for the balloon.
      if (vpos == VPOS_BELOW) {
        if (hpos == HPOS_LEFT) {
          int[] xPts = {16, 16, 32};

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      area.subtract(new Area(new Rectangle(width - 2, y + 2, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + height - 2, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + 3, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + height - 3, 1, 1)));
      area.subtract(new Area(new Rectangle(width, y + 5, 1, 1)));
      area.subtract(new Area(new Rectangle(width, y + height - 5, 1, 2)));
      // Add in the triangle piece for the balloon.
      if (vpos == VPOS_BELOW) {
        if (hpos == HPOS_LEFT) {
          int[] xPts = {16, 16, 32};
          int[] yPts = {-1, 16, 16};

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      area.add(new Area(new Rectangle(4, y + 1, 1, 1)));
      area.add(new Area(new Rectangle(6, y, 2, 1)));
      area.add(new Area(new Rectangle(width - 7, y, 2, 1)));
      // Subtract the extra pixels that are not included by default due to the
      // differences between Graphics drawing and Shape creation.
      area.subtract(new Area(new Rectangle(2, y + height - 2, 1, 1)));
      area.subtract(new Area(new Rectangle(3, y + height - 1, 1, 1)));
      area.subtract(new Area(new Rectangle(5, y + height, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 5, y + height, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 3, y + height - 1, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + 2, 1, 1)));

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      area.add(new Area(new Rectangle(6, y, 2, 1)));
      area.add(new Area(new Rectangle(width - 7, y, 2, 1)));
      // Subtract the extra pixels that are not included by default due to the
      // differences between Graphics drawing and Shape creation.
      area.subtract(new Area(new Rectangle(2, y + height - 2, 1, 1)));
      area.subtract(new Area(new Rectangle(3, y + height - 1, 1, 1)));
      area.subtract(new Area(new Rectangle(5, y + height, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 5, y + height, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 3, y + height - 1, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + 2, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + height - 2, 2, 1)));

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      area.add(new Area(new Rectangle(width - 7, y, 2, 1)));
      // Subtract the extra pixels that are not included by default due to the
      // differences between Graphics drawing and Shape creation.
      area.subtract(new Area(new Rectangle(2, y + height - 2, 1, 1)));
      area.subtract(new Area(new Rectangle(3, y + height - 1, 1, 1)));
      area.subtract(new Area(new Rectangle(5, y + height, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 5, y + height, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 3, y + height - 1, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + 2, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + height - 2, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + 3, 1, 1)));

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      // Subtract the extra pixels that are not included by default due to the
      // differences between Graphics drawing and Shape creation.
      area.subtract(new Area(new Rectangle(2, y + height - 2, 1, 1)));
      area.subtract(new Area(new Rectangle(3, y + height - 1, 1, 1)));
      area.subtract(new Area(new Rectangle(5, y + height, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 5, y + height, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 3, y + height - 1, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + 2, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 2, y + height - 2, 2, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + 3, 1, 1)));
      area.subtract(new Area(new Rectangle(width - 1, y + height - 3, 1, 1)));

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