/*
* Copyright (C) 2013 Andreas Stuetz <andreas.stuetz@gmail.com>
*
* 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.netease.nim.demo.common.ui.viewpager;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.os.Build;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.view.GestureDetector;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.HorizontalScrollView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.netease.nim.demo.R;
import com.netease.nim.demo.main.reminder.ReminderItem;
import com.netease.nim.demo.main.reminder.ReminderSettings;
import com.netease.nim.uikit.common.ui.drop.DropFake;
import com.netease.nim.uikit.common.ui.drop.DropManager;
import com.netease.nim.uikit.common.util.sys.ScreenUtil;
import java.util.Locale;
public class PagerSlidingTabStrip extends HorizontalScrollView implements OnPageChangeListener {
// @formatter:off
private static final int[] ATTRS = new int[]{android.R.attr.textSize, android.R.attr.textColor};
// @formatter:on
private LinearLayout.LayoutParams tabViewLayoutParams;
private LinearLayout tabsContainer;
private ViewPager pager;
private int tabCount;
private int currentPosition = 0;
public int getCurrentPosition() {
return currentPosition;
}
private float currentPositionOffset = 0f;
private Paint rectPaint;
private Paint dividerPaint;
private int indicatorColor = 0xFF0888ff;
private int underlineColor = getResources().getColor(R.color.skin_page_tab_underline_color);// 0xFFD9D9D9;
private int dividerColor = 0x00000000;
private int checkedTextColor = R.color.color_blue_0888ff;
private int unCheckedTextColor = R.color.action_bar_tittle_color_555555;
private boolean textAllCaps = true;
private int scrollOffset = 52;
private int indicatorHeight = 3;
private int underlineHeight = 2;
private int dividerPadding = 12;
private int tabPadding = 0;
private int dividerWidth = 1;
private int lastScrollX = 0;
private Locale locale;
private OnTabClickListener onTabClickListener = null;
private OnTabDoubleTapListener onTabDoubleTapListener = null;
private OnCustomTabListener onCustomTabListener = null;
public PagerSlidingTabStrip(Context context) {
this(context, null);
}
public PagerSlidingTabStrip(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public PagerSlidingTabStrip(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
setFillViewport(true);
setWillNotDraw(false);
tabsContainer = new LinearLayout(context);
tabsContainer.setOrientation(LinearLayout.HORIZONTAL);
tabsContainer.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
addView(tabsContainer);
DisplayMetrics dm = getResources().getDisplayMetrics();
scrollOffset = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, scrollOffset, dm);
indicatorHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, indicatorHeight, dm);
underlineHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_PX, underlineHeight, dm);
dividerPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerPadding, dm);
tabPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, tabPadding, dm);
dividerWidth = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerWidth, dm);
// get system attrs (android:textSize and android:textColor)
TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);
a.recycle();
// get custom attrs
a = context.obtainStyledAttributes(attrs, R.styleable.PagerSlidingTabStrip);
indicatorColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsIndicatorColor, indicatorColor);
underlineColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsUnderlineColor, underlineColor);
dividerColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsDividerColor, dividerColor);
checkedTextColor = a.getResourceId(R.styleable.TwoTextView_ttLeftTextColor, R.color.color_blue_0888ff);
unCheckedTextColor = a.getResourceId(R.styleable.TwoTextView_ttLeftTextColor,
R.color.action_bar_tittle_color_555555);
indicatorHeight = a
.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsIndicatorHeight, indicatorHeight);
underlineHeight = a
.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsUnderlineHeight, underlineHeight);
dividerPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsDividerPadding, dividerPadding);
tabPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsTabPaddingLeftRight, tabPadding);
scrollOffset = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsScrollOffset, scrollOffset);
textAllCaps = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsTextAllCaps, textAllCaps);
a.recycle();
rectPaint = new Paint();
rectPaint.setAntiAlias(true);
rectPaint.setStyle(Style.FILL);
dividerPaint = new Paint();
dividerPaint.setAntiAlias(true);
dividerPaint.setStrokeWidth(dividerWidth);
tabViewLayoutParams = new LinearLayout.LayoutParams(0, LayoutParams.MATCH_PARENT, 1.0f);
if (locale == null) {
locale = getResources().getConfiguration().locale;
}
}
//
// OnPageChangeListener
//
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
currentPosition = position;
currentPositionOffset = positionOffset;
scrollToChild(position, (int) (positionOffset * tabsContainer.getChildAt(position).getWidth()));
invalidate();
}
@Override
public void onPageScrollStateChanged(int state) {
if (state == ViewPager.SCROLL_STATE_IDLE) {
scrollToChild(pager.getCurrentItem(), 0);
}
}
@Override
public void onPageSelected(int position) {
setChooseTabViewTextColor(position);
}
//
// OnPageChangeListener
//
public void setViewPager(ViewPager pager) {
this.pager = pager;
if (pager.getAdapter() == null) {
throw new IllegalStateException("ViewPager does not have adapter instance.");
}
notifyDataSetChanged();
}
public void notifyDataSetChanged() {
tabsContainer.removeAllViews();
tabCount = pager.getAdapter().getCount();
for (int i = 0; i < tabCount; i++) {
addTabView(i, pager.getAdapter().getPageTitle(i).toString());
}
// updateTabStyles();
getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
@Override
public void onGlobalLayout() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
getViewTreeObserver().removeGlobalOnLayoutListener(this);
} else {
getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
currentPosition = pager.getCurrentItem();
setChooseTabViewTextColor(currentPosition);
scrollToChild(currentPosition, 0);
}
});
}
private void setChooseTabViewTextColor(int position) {
int childCount = tabsContainer.getChildCount();
LinearLayout tabView;
TextView textView;
for (int i = 0; i < childCount; ++i) {
tabView = (LinearLayout) tabsContainer.getChildAt(i);
textView = (TextView) tabView.findViewById(R.id.tab_title_label);
if (i == position) {
textView.setTextColor(getResources().getColor(checkedTextColor));
} else {
textView.setTextColor(getResources().getColor(unCheckedTextColor));
}
}
}
private void addTabView(final int position, String title) {
View tabView = null;
boolean screenAdaptation = false;
final LayoutInflater inflater = LayoutInflater.from(getContext());
if (this.onCustomTabListener != null) {
int tabResId = onCustomTabListener.getTabLayoutResId(position);
if (tabResId != 0) {
tabView = inflater.inflate(tabResId, null);
} else {
tabView = onCustomTabListener.getTabLayoutView(inflater, position);
}
screenAdaptation = onCustomTabListener.screenAdaptation();
}
if (tabView == null) {
tabView = inflater.inflate(R.layout.tab_layout_main, null);
}
TextView titleTV = ((TextView) tabView.findViewById(R.id.tab_title_label));
final boolean needAdaptation = ScreenUtil.density <= 1.5 && screenAdaptation;
final Resources resources = getContext().getResources();
if (titleTV != null) {
titleTV.setTextSize(TypedValue.COMPLEX_UNIT_PX, needAdaptation ? resources.getDimensionPixelSize(R.dimen.text_size_11) : resources.getDimensionPixelSize(R.dimen.text_size_15));
titleTV.setText(title);
}
final DropFake unreadTV = ((DropFake) tabView.findViewById(R.id.tab_new_msg_label));
if (unreadTV != null) {
unreadTV.setTouchListener(new DropFake.ITouchListener() {
@Override
public void onDown() {
DropManager.getInstance().setCurrentId(String.valueOf(position));
DropManager.getInstance().down(unreadTV, unreadTV.getText());
}
@Override
public void onMove(float curX, float curY) {
DropManager.getInstance().move(curX, curY);
}
@Override
public void onUp() {
DropManager.getInstance().up();
}
});
//unreadTV.setTextSize(TypedValue.COMPLEX_UNIT_PX, needAdaptation ? resources.getDimensionPixelSize(R.dimen.text_size_9) : resources.getDimensionPixelSize(R.dimen.text_size_12));
}
addTab(position, tabView);
}
private void addTab(final int position, View tab) {
tab.setFocusable(true);
tab.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (pager.getCurrentItem() == position && onTabClickListener != null) {
onTabClickListener.onCurrentTabClicked(position);
} else {
pager.setCurrentItem(position, true);
}
}
});
addTabDoubleTapListener(position, tab);
tab.setPadding(tabPadding, 0, tabPadding, 0);
tabsContainer.addView(tab, position, tabViewLayoutParams);
}
private void addTabDoubleTapListener(final int position, View tab) {
final GestureDetector gd = new GestureDetector(getContext(), new GestureDetector.SimpleOnGestureListener() {
@Override
public boolean onDoubleTap(MotionEvent e) {
if (onTabDoubleTapListener != null)
onTabDoubleTapListener.onCurrentTabDoubleTap(position);
return true;
}
});
tab.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
return gd.onTouchEvent(event);
}
});
}
public void updateTab(int index, ReminderItem item) {
LinearLayout tabView = (LinearLayout) tabsContainer.getChildAt(index);
ImageView indicatorView = (ImageView) tabView.findViewById(R.id.tab_new_indicator);
final DropFake unreadTV = ((DropFake) tabView.findViewById(R.id.tab_new_msg_label));
if (item == null || unreadTV == null || indicatorView == null) {
unreadTV.setVisibility(View.GONE);
indicatorView.setVisibility(View.GONE);
return;
}
int unread = item.unread();
boolean indicator = item.indicator();
unreadTV.setVisibility(unread > 0 ? View.VISIBLE : View.GONE);
indicatorView.setVisibility(indicator ? View.VISIBLE : View.GONE);
if (unread > 0) {
unreadTV.setText(String.valueOf(ReminderSettings.unreadMessageShowRule(unread)));
}
}
private void scrollToChild(int position, int offset) {
if (tabCount == 0) {
return;
}
int newScrollX = tabsContainer.getChildAt(position).getLeft() + offset;
if (position > 0 || offset > 0) {
newScrollX -= scrollOffset;
}
if (newScrollX != lastScrollX) {
lastScrollX = newScrollX;
scrollTo(newScrollX, 0);
}
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (isInEditMode() || tabCount == 0) {
return;
}
final int height = getHeight();
// draw underline
rectPaint.setColor(underlineColor);
canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);
// draw indicator line
rectPaint.setColor(indicatorColor);
// default: line below current tab
View currentTab = tabsContainer.getChildAt(currentPosition);
float lineLeft = currentTab.getLeft();
float lineRight = currentTab.getRight();
// if there is an offset, start interpolating left and right coordinates between current and next tab
if (currentPositionOffset > 0f && currentPosition < tabCount - 1) {
View nextTab = tabsContainer.getChildAt(currentPosition + 1);
final float nextTabLeft = nextTab.getLeft();
final float nextTabRight = nextTab.getRight();
lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft);
lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight);
}
canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);
// draw divider
// dividerPaint.setColor(dividerColor);
// for (int i = 0; i < tabCount - 1; i++) {
// View tab = tabsContainer.getChildAt(i);
// canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
// }
}
public void setIndicatorColor(int indicatorColor) {
this.indicatorColor = indicatorColor;
invalidate();
}
public void setIndicatorColorResource(int resId) {
this.indicatorColor = getResources().getColor(resId);
invalidate();
}
public int getIndicatorColor() {
return this.indicatorColor;
}
public void setIndicatorHeight(int indicatorLineHeightPx) {
this.indicatorHeight = indicatorLineHeightPx;
invalidate();
}
public int getIndicatorHeight() {
return indicatorHeight;
}
public void setUnderlineColor(int underlineColor) {
this.underlineColor = underlineColor;
invalidate();
}
public void setUnderlineColorResource(int resId) {
this.underlineColor = getResources().getColor(resId);
invalidate();
}
public int getUnderlineColor() {
return underlineColor;
}
public void setDividerColor(int dividerColor) {
this.dividerColor = dividerColor;
invalidate();
}
public void setDividerColorResource(int resId) {
this.dividerColor = getResources().getColor(resId);
invalidate();
}
public int getDividerColor() {
return dividerColor;
}
public void setCheckedTextColorResource(int resId) {
this.checkedTextColor = resId;
invalidate();
}
public void setUnderlineHeight(int underlineHeightPx) {
this.underlineHeight = underlineHeightPx;
invalidate();
}
public int getUnderlineHeight() {
return underlineHeight;
}
public void setDividerPadding(int dividerPaddingPx) {
this.dividerPadding = dividerPaddingPx;
invalidate();
}
public int getDividerPadding() {
return dividerPadding;
}
public void setScrollOffset(int scrollOffsetPx) {
this.scrollOffset = scrollOffsetPx;
invalidate();
}
public int getScrollOffset() {
return scrollOffset;
}
public boolean isTextAllCaps() {
return textAllCaps;
}
public void setAllCaps(boolean textAllCaps) {
this.textAllCaps = textAllCaps;
}
public int getTabPaddingLeftRight() {
return tabPadding;
}
@Override
public void onRestoreInstanceState(Parcelable state) {
SavedState savedState = (SavedState) state;
super.onRestoreInstanceState(savedState.getSuperState());
// currentPosition = savedState.currentPosition;
currentPosition = 0;
requestLayout();
}
@Override
public Parcelable onSaveInstanceState() {
Parcelable superState = super.onSaveInstanceState();
SavedState savedState = new SavedState(superState);
savedState.currentPosition = currentPosition;
return savedState;
}
static class SavedState extends BaseSavedState {
int currentPosition;
public SavedState(Parcelable superState) {
super(superState);
}
private SavedState(Parcel in) {
super(in);
currentPosition = in.readInt();
}
@Override
public void writeToParcel(Parcel dest, int flags) {
super.writeToParcel(dest, flags);
dest.writeInt(currentPosition);
}
public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
@Override
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
@Override
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
}
public void setOnTabClickListener(OnTabClickListener onTabClickListener) {
this.onTabClickListener = onTabClickListener;
}
public void setOnTabDoubleTapListener(OnTabDoubleTapListener onTabDoubleTapListener) {
this.onTabDoubleTapListener = onTabDoubleTapListener;
}
/**
* must invoke before setViewPager
*
* @param onCustomTabListener
*/
public void setOnCustomTabListener(OnCustomTabListener onCustomTabListener) {
this.onCustomTabListener = onCustomTabListener;
}
/**
* TAB 的点击监�?
*/
public interface OnTabClickListener {
public void onCurrentTabClicked(int position);
}
/**
* TAB 的双击监�?
*/
public interface OnTabDoubleTapListener {
public void onCurrentTabDoubleTap(int position);
}
/**
* 获取每个TAB的自定义布局
*/
public static class OnCustomTabListener {
/**
* �?要自定义TAB的布�?�?
* 重写该方法，返回对应的layout id
*
* @param position
* @return
*/
public int getTabLayoutResId(int position) {
return 0;
}
/**
* �?要自定义TAB的布�?
* 重写该方法，直接返回对应的view
*
* @param inflater
* @param position
* @return
*/
public View getTabLayoutView(LayoutInflater inflater, int position) {
return null;
}
/**
* 是否�?要小屏幕适配,只在存在多个tab，且tab的布�?较紧时�?�配,现在只用于主界面
*
* @return
*/
public boolean screenAdaptation() {
return false;
}
}
}