AlignHorizontallyReference.java
/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License 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 androidx.constraintlayout.core.state.helpers;
import androidx.constraintlayout.core.state.ConstraintReference;
import androidx.constraintlayout.core.state.HelperReference;
import androidx.constraintlayout.core.state.State;
public class AlignHorizontallyReference extends HelperReference {
private float mBias = 0.5f;
public AlignHorizontallyReference(State state) {
super(state, State.Helper.ALIGN_VERTICALLY);
}
// @TODO: add description
@Override
public void apply() {
for (Object key : mReferences) {
ConstraintReference reference = mHelperState.constraints(key);
reference.clearHorizontal();
if (mStartToStart != null) {
reference.startToStart(mStartToStart);
} else if (mStartToEnd != null) {
reference.startToEnd(mStartToEnd);
} else {
reference.startToStart(State.PARENT);
}
if (mEndToStart != null) {
reference.endToStart(mEndToStart);
} else if (mEndToEnd != null) {
reference.endToEnd(mEndToEnd);
} else {
reference.endToEnd(State.PARENT);
}
if (mBias != 0.5f) {
reference.horizontalBias(mBias);
}
}
}
}