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/*
* Copyright (C) 2017 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.android.launcher3.allapps;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.Button;
import android.widget.LinearLayout;
import com.android.launcher3.R;
import com.android.launcher3.Utilities;
import com.android.launcher3.util.Themes;
/**
* Supports two indicator colors, dedicated for personal and work tabs.
*/
public class PersonalWorkSlidingTabStrip extends LinearLayout {
private final Paint mPersonalTabIndicatorPaint;
private final Paint mWorkTabIndicatorPaint;
private final Paint mDividerPaint;
private int mSelectedIndicatorHeight;
private int mIndicatorLeft = -1;
private int mIndicatorRight = -1;
private int mSelectedPosition = 0;
private float mSelectionOffset;
private boolean mIsRtl;
public PersonalWorkSlidingTabStrip(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
setOrientation(HORIZONTAL);
setWillNotDraw(false);
mSelectedIndicatorHeight =
getResources().getDimensionPixelSize(R.dimen.all_apps_tabs_indicator_height);
mPersonalTabIndicatorPaint = new Paint();
mPersonalTabIndicatorPaint.setColor(
Themes.getAttrColor(context, android.R.attr.colorAccent));
mWorkTabIndicatorPaint = new Paint();
mWorkTabIndicatorPaint.setColor(getResources().getColor(R.color.work_profile_color));
mIsRtl = Utilities.isRtl(getResources());
mDividerPaint = new Paint();
mDividerPaint.setColor(Themes.getAttrColor(context, android.R.attr.colorControlHighlight));
mDividerPaint.setStrokeWidth(getResources().getDimensionPixelSize(R.dimen.all_apps_divider_height));
}
public void updateIndicatorPosition(int position, float positionOffset) {
mSelectedPosition = position;
mSelectionOffset = positionOffset;
updateIndicatorPosition();
}
public void updateTabTextColor(int pos) {
for (int i = 0; i < getChildCount(); i++) {
Button tab = (Button) getChildAt(i);
tab.setSelected(i == pos);
}
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
updateTabTextColor(mSelectedPosition);
updateIndicatorPosition(mSelectedPosition, 0);
}
private void updateIndicatorPosition() {
final View tab = getChildAt(mSelectedPosition);
int left, right;
if (tab != null && tab.getWidth() > 0) {
left = tab.getLeft();
right = tab.getRight();
if (mSelectionOffset > 0f && mSelectedPosition < getChildCount() - 1) {
// Draw the selection partway between the tabs
View nextTitle = getChildAt(mSelectedPosition + 1);
left = (int) (mSelectionOffset * nextTitle.getLeft() +
(1.0f - mSelectionOffset) * left);
right = (int) (mSelectionOffset * nextTitle.getRight() +
(1.0f - mSelectionOffset) * right);
}
} else {
left = right = -1;
}
setIndicatorPosition(left, right);
}
private void setIndicatorPosition(int left, int right) {
if (left != mIndicatorLeft || right != mIndicatorRight) {
mIndicatorLeft = left;
mIndicatorRight = right;
invalidate();
}
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
float y = getHeight() - mDividerPaint.getStrokeWidth();
canvas.drawLine(getPaddingLeft(), y, getWidth() - getPaddingRight(), y, mDividerPaint);
final float middleX = getWidth() / 2.0f;
if (mIndicatorLeft <= middleX) {
canvas.drawRect(mIndicatorLeft, getHeight() - mSelectedIndicatorHeight,
middleX, getHeight(), getPaint(true /* firstHalf */));
}
if (mIndicatorRight > middleX) {
canvas.drawRect(middleX, getHeight() - mSelectedIndicatorHeight,
mIndicatorRight, getHeight(), getPaint(false /* firstHalf */));
}
}
private Paint getPaint(boolean firstHalf) {
boolean isPersonal = mIsRtl ^ firstHalf;
return isPersonal ? mPersonalTabIndicatorPaint : mWorkTabIndicatorPaint;
}
}
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