/
ClearTextEndIconDelegate.java
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/
ClearTextEndIconDelegate.java
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/*
* 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 com.google.android.material.textfield;
import com.google.android.material.R;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.animation.AnimatorSet;
import android.animation.ValueAnimator;
import android.text.Editable;
import android.view.View.OnClickListener;
import android.view.View.OnFocusChangeListener;
import android.widget.EditText;
import androidx.annotation.DrawableRes;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import com.google.android.material.animation.AnimationUtils;
/** Default initialization of the clear text end icon {@link TextInputLayout.EndIconMode}. */
class ClearTextEndIconDelegate extends EndIconDelegate {
private static final int ANIMATION_FADE_DURATION = 100;
private static final int ANIMATION_SCALE_DURATION = 150;
private static final float ANIMATION_SCALE_FROM_VALUE = 0.8f;
@Nullable
private EditText editText;
private final OnClickListener onIconClickListener = view -> {
if (editText == null) {
return;
}
Editable text = editText.getText();
if (text != null) {
text.clear();
}
endLayout.refreshEndIconDrawableState();
};
private final OnFocusChangeListener onFocusChangeListener =
(view, hasFocus) -> animateIcon(shouldBeVisible());
private AnimatorSet iconInAnim;
private ValueAnimator iconOutAnim;
ClearTextEndIconDelegate(@NonNull EndCompoundLayout endLayout, @DrawableRes int customEndIcon) {
super(endLayout, customEndIcon);
}
@Override
void setUp() {
endLayout.setEndIconDrawable(
customEndIcon == 0 ? R.drawable.mtrl_ic_cancel : customEndIcon);
endLayout.setEndIconContentDescription(
endLayout.getResources().getText(R.string.clear_text_end_icon_content_description));
endLayout.setEndIconCheckable(false);
initAnimators();
}
@Override
void tearDown() {
if (editText != null) {
editText.post(() ->
// Make sure icon view is visible.
animateIcon(/* show= */ true));
}
}
@Override
void onSuffixVisibilityChanged(boolean visible) {
if (endLayout.getSuffixText() == null) {
return;
}
animateIcon(visible);
}
@Override
OnClickListener getOnIconClickListener() {
return onIconClickListener;
}
@Override
public void onEditTextAttached(@Nullable EditText editText) {
this.editText = editText;
textInputLayout.setEndIconVisible(shouldBeVisible());
}
@Override
void afterEditTextChanged(@NonNull Editable s) {
if (endLayout.getSuffixText() != null) {
return;
}
animateIcon(shouldBeVisible());
}
@Override
OnFocusChangeListener getOnEditTextFocusChangeListener() {
return onFocusChangeListener;
}
@Override
OnFocusChangeListener getOnIconViewFocusChangeListener() {
return onFocusChangeListener;
}
private void animateIcon(boolean show) {
boolean shouldSkipAnimation = endLayout.isEndIconVisible() == show;
if (show && !iconInAnim.isRunning()) {
iconOutAnim.cancel();
iconInAnim.start();
if (shouldSkipAnimation) {
iconInAnim.end();
}
} else if (!show) {
iconInAnim.cancel();
iconOutAnim.start();
if (shouldSkipAnimation) {
iconOutAnim.end();
}
}
}
private void initAnimators() {
ValueAnimator scaleAnimator = getScaleAnimator();
ValueAnimator fadeAnimator = getAlphaAnimator(0, 1);
iconInAnim = new AnimatorSet();
iconInAnim.playTogether(scaleAnimator, fadeAnimator);
iconInAnim.addListener(
new AnimatorListenerAdapter() {
@Override
public void onAnimationStart(Animator animation) {
endLayout.setEndIconVisible(true);
}
});
iconOutAnim = getAlphaAnimator(1, 0);
iconOutAnim.addListener(
new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
endLayout.setEndIconVisible(false);
}
});
}
private ValueAnimator getAlphaAnimator(float... values) {
ValueAnimator animator = ValueAnimator.ofFloat(values);
animator.setInterpolator(AnimationUtils.LINEAR_INTERPOLATOR);
animator.setDuration(ANIMATION_FADE_DURATION);
animator.addUpdateListener(animation -> {
float alpha = (float) animation.getAnimatedValue();
endIconView.setAlpha(alpha);
});
return animator;
}
private ValueAnimator getScaleAnimator() {
ValueAnimator animator = ValueAnimator.ofFloat(ANIMATION_SCALE_FROM_VALUE, 1);
animator.setInterpolator(AnimationUtils.LINEAR_OUT_SLOW_IN_INTERPOLATOR);
animator.setDuration(ANIMATION_SCALE_DURATION);
animator.addUpdateListener(animation -> {
float scale = (float) animation.getAnimatedValue();
endIconView.setScaleX(scale);
endIconView.setScaleY(scale);
});
return animator;
}
private boolean shouldBeVisible() {
return editText != null
&& (editText.hasFocus() || endIconView.hasFocus())
&& editText.getText().length() > 0;
}
}