/*
* Copyright 2013, Edmodo, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this work except in compliance with the License.
* You may obtain a copy of the License in the LICENSE file, or at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS"
* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
package com.marshalchen.common.uimodule.cropperimage.cropwindow.handle;
import android.graphics.Rect;
import com.marshalchen.common.uimodule.cropperimage.cropwindow.edge.Edge;
import com.marshalchen.common.uimodule.cropperimage.util.AspectRatioUtil;
/**
* HandleHelper class to handle vertical handles (i.e. left and right handles).
*/
class VerticalHandleHelper extends HandleHelper {
// Member Variables ////////////////////////////////////////////////////////
private Edge mEdge;
// Constructor /////////////////////////////////////////////////////////////
VerticalHandleHelper(Edge edge) {
super(null, edge);
mEdge = edge;
}
// HandleHelper Methods ////////////////////////////////////////////////////
@Override
void updateCropWindow(float x,
float y,
float targetAspectRatio,
Rect imageRect,
float snapRadius) {
// Adjust this Edge accordingly.
mEdge.adjustCoordinate(x, y, imageRect, snapRadius, targetAspectRatio);
float left = Edge.LEFT.getCoordinate();
float top = Edge.TOP.getCoordinate();
float right = Edge.RIGHT.getCoordinate();
float bottom = Edge.BOTTOM.getCoordinate();
// After this Edge is moved, our crop window is now out of proportion.
final float targetHeight = AspectRatioUtil.calculateHeight(left, right, targetAspectRatio);
final float currentHeight = bottom - top;
// Adjust the crop window so that it maintains the given aspect ratio by
// moving the adjacent edges symmetrically in or out.
final float difference = targetHeight - currentHeight;
final float halfDifference = difference / 2;
top -= halfDifference;
bottom += halfDifference;
Edge.TOP.setCoordinate(top);
Edge.BOTTOM.setCoordinate(bottom);
// Check if we have gone out of bounds on the top or bottom, and fix.
if (Edge.TOP.isOutsideMargin(imageRect, snapRadius) && !mEdge.isNewRectangleOutOfBounds(Edge.TOP,
imageRect,
targetAspectRatio)) {
final float offset = Edge.TOP.snapToRect(imageRect);
Edge.BOTTOM.offset(-offset);
mEdge.adjustCoordinate(targetAspectRatio);
}
if (Edge.BOTTOM.isOutsideMargin(imageRect, snapRadius) && !mEdge.isNewRectangleOutOfBounds(Edge.BOTTOM,
imageRect,
targetAspectRatio)) {
final float offset = Edge.BOTTOM.snapToRect(imageRect);
Edge.TOP.offset(-offset);
mEdge.adjustCoordinate(targetAspectRatio);
}
}
}