ShadowViewHelper.java
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/*
* Copyright (c) 2016 wugian
* 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.xgimi.gimicinema.view.shadow;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.StateListDrawable;
import android.os.Build;
import android.view.View;
import android.view.ViewTreeObserver;
/**
* Author: wangjie
* Email: tiantian.china.2@gmail.com
* Date: 5/25/15.
*/
public class ShadowViewHelper {
private ShadowProperty shadowProperty;
private View view;
private ShadowViewDrawable shadowViewDrawable;
private ShadowViewDrawable shadowViewDrawableHighlighted;
private int color;
private int highlightedColor;
private float rx;
private float ry;
private StateListDrawable stateListDrawable;
public static ShadowViewHelper bindShadowHelper(ShadowProperty shadowProperty, View view) {
return new ShadowViewHelper(shadowProperty, view, Color.WHITE, Color.WHITE, 0, 0);
}
public static ShadowViewHelper bindShadowHelper(ShadowProperty shadowProperty, View view, int color) {
return new ShadowViewHelper(shadowProperty, view, color, color, 0, 0);
}
public static ShadowViewHelper bindShadowHelper(ShadowProperty shadowProperty, View view, int color, int highlightedColor) {
return new ShadowViewHelper(shadowProperty, view, color, highlightedColor, 0, 0);
}
public static ShadowViewHelper bindShadowHelper(ShadowProperty shadowProperty, View view, float rx, float ry) {
return new ShadowViewHelper(shadowProperty, view, Color.WHITE, Color.WHITE, rx, ry);
}
public static ShadowViewHelper bindShadowHelper(ShadowProperty shadowProperty, View view, int color, float rx, float ry) {
return new ShadowViewHelper(shadowProperty, view, color, color, rx, ry);
}
public static ShadowViewHelper bindShadowHelper(ShadowProperty shadowProperty, View view, int color, int highlightedColor, float rx, float ry) {
return new ShadowViewHelper(shadowProperty, view, color, highlightedColor, rx, ry);
}
private ShadowViewHelper(ShadowProperty shadowProperty, View view, int color, int highlightedColor, float rx, float ry) {
this.shadowProperty = shadowProperty;
this.view = view;
this.color = color;
this.highlightedColor = highlightedColor;
this.rx = rx;
this.ry = ry;
// If default color is not the same as highlighted color,
// then set background to be a StateListDrawable
init(this.color != this.highlightedColor);
}
private void init(boolean useStateListDrawable) {
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.HONEYCOMB) {
view.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
int shadowOffset = shadowProperty.getShadowOffset();
view.setPadding(view.getPaddingLeft() + shadowOffset, view.getPaddingTop() + shadowOffset, view.getPaddingRight() + shadowOffset, view.getPaddingBottom() + shadowOffset);
shadowViewDrawable = new ShadowViewDrawable(shadowProperty, color, rx, ry);
view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
shadowViewDrawable.setBounds(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
} else {
view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
}
});
// Create StateListDrawable with different states if highlighted color is different from default colour.
if (useStateListDrawable) {
shadowViewDrawableHighlighted = new ShadowViewDrawable(shadowProperty, highlightedColor, rx, ry);
view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
shadowViewDrawableHighlighted.setBounds(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
} else {
view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
}
});
stateListDrawable = new StateListDrawable();
int[] stateHighlighted = new int[]{android.R.attr.state_pressed};
Drawable highlightedDrawable = shadowViewDrawableHighlighted;
stateListDrawable.addState(stateHighlighted, highlightedDrawable);
int[] stateNormal = new int[]{};
Drawable normalDrawable = shadowViewDrawable;
stateListDrawable.addState(stateNormal, normalDrawable);
}
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
if (stateListDrawable != null) {
view.setBackgroundDrawable(stateListDrawable);
} else {
view.setBackgroundDrawable(shadowViewDrawable);
}
} else {
if (stateListDrawable != null) {
view.setBackground(stateListDrawable);
} else {
view.setBackground(shadowViewDrawable);
}
}
}
public ShadowViewDrawable getShadowViewDrawable() {
return shadowViewDrawable;
}
public View getView() {
return view;
}
public ShadowProperty getShadowProperty() {
return shadowProperty;
}
}