/**
* Get the resulting y-position of the top edge of the crop window given the handle's position and
* the image's bounding box and snap radius.
*
* @param y the x-position that the top edge is dragged to
* @param imageRect the bounding box of the image that is being cropped
* @param imageSnapRadius the snap distance to the image edge (in pixels)
* @return the actual y-position of the top edge
*/
private static float adjustTop(
float y, Rect imageRect, float imageSnapRadius, float aspectRatio) {
float resultY = y;
if (y - imageRect.top < imageSnapRadius) resultY = imageRect.top;
else {
// Select the minimum of the three possible values to use
float resultYVert = Float.POSITIVE_INFINITY;
float resultYHoriz = Float.POSITIVE_INFINITY;
// Checks if the window is too small vertically
if (y >= Edge.BOTTOM.getCoordinate() - MIN_CROP_LENGTH_PX)
resultYHoriz = Edge.BOTTOM.getCoordinate() - MIN_CROP_LENGTH_PX;
// Checks if the window is too small horizontally
if (((Edge.BOTTOM.getCoordinate() - y) * aspectRatio) <= MIN_CROP_LENGTH_PX)
resultYVert = Edge.BOTTOM.getCoordinate() - (MIN_CROP_LENGTH_PX / aspectRatio);
resultY = Math.min(resultY, Math.min(resultYHoriz, resultYVert));
}
return resultY;
}
/**
* Adjusts this Edge position such that the resulting window will have the given aspect ratio.
*
* @param aspectRatio the aspect ratio to achieve
*/
public void adjustCoordinate(float aspectRatio) {
final float left = Edge.LEFT.getCoordinate();
final float top = Edge.TOP.getCoordinate();
final float right = Edge.RIGHT.getCoordinate();
final float bottom = Edge.BOTTOM.getCoordinate();
switch (this) {
case LEFT:
mCoordinate = AspectRatioUtil.calculateLeft(top, right, bottom, aspectRatio);
break;
case TOP:
mCoordinate = AspectRatioUtil.calculateTop(left, right, bottom, aspectRatio);
break;
case RIGHT:
mCoordinate = AspectRatioUtil.calculateRight(left, top, bottom, aspectRatio);
break;
case BOTTOM:
mCoordinate = AspectRatioUtil.calculateBottom(left, top, right, aspectRatio);
break;
}
}
/** Gets the current height of the crop window. */
public static float getHeight() {
return Edge.BOTTOM.getCoordinate() - Edge.TOP.getCoordinate();
}
/**
* Returns whether or not you can re-scale the image based on whether any edge would be out of
* bounds. Checks all the edges for a possibility of jumping out of bounds.
*
* @param Edge the Edge that is about to be expanded
* @param imageRect the rectangle of the picture
* @param aspectratio the desired aspectRatio of the picture.
* @return whether or not the new image would be out of bounds.
*/
public boolean isNewRectangleOutOfBounds(Edge edge, Rect imageRect, float aspectRatio) {
float offset = edge.snapOffset(imageRect);
switch (this) {
case LEFT:
if (edge.equals(Edge.TOP)) {
float top = imageRect.top;
float bottom = Edge.BOTTOM.getCoordinate() - offset;
float right = Edge.RIGHT.getCoordinate();
float left = AspectRatioUtil.calculateLeft(top, right, bottom, aspectRatio);
return isOutOfBounds(top, left, bottom, right, imageRect);
} else if (edge.equals(Edge.BOTTOM)) {
float bottom = imageRect.bottom;
float top = Edge.TOP.getCoordinate() - offset;
float right = Edge.RIGHT.getCoordinate();
float left = AspectRatioUtil.calculateLeft(top, right, bottom, aspectRatio);
return isOutOfBounds(top, left, bottom, right, imageRect);
}
break;
case TOP:
if (edge.equals(Edge.LEFT)) {
float left = imageRect.left;
float right = Edge.RIGHT.getCoordinate() - offset;
float bottom = Edge.BOTTOM.getCoordinate();
float top = AspectRatioUtil.calculateTop(left, right, bottom, aspectRatio);
return isOutOfBounds(top, left, bottom, right, imageRect);
} else if (edge.equals(Edge.RIGHT)) {
float right = imageRect.right;
float left = Edge.LEFT.getCoordinate() - offset;
float bottom = Edge.BOTTOM.getCoordinate();
float top = AspectRatioUtil.calculateTop(left, right, bottom, aspectRatio);
return isOutOfBounds(top, left, bottom, right, imageRect);
}
break;
case RIGHT:
if (edge.equals(Edge.TOP)) {
float top = imageRect.top;
float bottom = Edge.BOTTOM.getCoordinate() - offset;
float left = Edge.LEFT.getCoordinate();
float right = AspectRatioUtil.calculateRight(left, top, bottom, aspectRatio);
return isOutOfBounds(top, left, bottom, right, imageRect);
} else if (edge.equals(Edge.BOTTOM)) {
float bottom = imageRect.bottom;
float top = Edge.TOP.getCoordinate() - offset;
float left = Edge.LEFT.getCoordinate();
float right = AspectRatioUtil.calculateRight(left, top, bottom, aspectRatio);
return isOutOfBounds(top, left, bottom, right, imageRect);
}
break;
case BOTTOM:
if (edge.equals(Edge.LEFT)) {
float left = imageRect.left;
float right = Edge.RIGHT.getCoordinate() - offset;
float top = Edge.TOP.getCoordinate();
float bottom = AspectRatioUtil.calculateBottom(left, top, right, aspectRatio);
return isOutOfBounds(top, left, bottom, right, imageRect);
} else if (edge.equals(Edge.RIGHT)) {
float right = imageRect.right;
float left = Edge.LEFT.getCoordinate() - offset;
float top = Edge.TOP.getCoordinate();
float bottom = AspectRatioUtil.calculateBottom(left, top, right, aspectRatio);
return isOutOfBounds(top, left, bottom, right, imageRect);
}
break;
}
return true;
}
