Constructing the Interactive Image of the Puzzle
| Construct the puzzle image as a composition of its
distinct parts. |
ImageBvr createImage() {
int i;
int j;
double x = 0;
double y = 0;
ImageBvr totalIm = emptyImage;
for (i = 0; i < _squares; i++, y += _inc) {
x = 0;
for (j = 0; j < _squares; j++, x += _inc) {
| Skip the last one, to leave empty space. |
if (i == _squares - 1 && j == _squares - 1) continue;
| Crop to get next cell and move lower left corner to the origin. |
ImageBvr croppedIm = _unitSourceIm.
crop(point2(toBvr(x), toBvr(y)),
point2(toBvr(x + _inc), toBvr(y + _inc)));
croppedIm = croppedIm.transform(translate(toBvr(-x), toBvr(-y)));
PickableImage pick = new PickableImage(croppedIm);
ImageBvr pickableCroppedIm = pick.getImageBvr();
| extract probe event and create pick event |
DXMEvent probedEvent = pick.getPickEvent();
DXMEvent pickedEvent = andEvent(leftButtonDown, probedEvent);
| Initially translate back to original space. |
Transform2Bvr initXf = translate(toBvr(x), toBvr(y));
| Allow transform to change as it's picked. |
Transform2Bvr xf = (Transform2Bvr)
untilNotify(initXf, pickedEvent,
new ImagePicker(i, j, pickedEvent, this));
| The entire cell is the transform applied to the cell
at the origin. |
ImageBvr movingIm = pickableCroppedIm.transform(xf);
| accumulate the cells of the puzzle |
totalIm = overlay(movingIm, totalIm);
}
first for
}
second for
| Establish initial empty cell. |
_emptyRow = _squares - 1;
_emptyCol = _squares - 1;
return totalIm;
}
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