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Added new tab control

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This commit is contained in:
Denis 2015-01-26 13:30:38 +02:00
parent 51f20e601b
commit 4b65f295d6
8 changed files with 840 additions and 18 deletions
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3
OsmAnd-java/OsmAnd-java.iml
View file

@ -21,7 +21,7 @@
<sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
</content>
<orderEntry type="sourceFolder" forTests="false" />
<orderEntry type="jdk" jdkName="1.6" jdkType="JavaSDK" />
<orderEntry type="jdk" jdkName="1.7" jdkType="JavaSDK" />
<orderEntry type="module-library">
<library name="bsh-core-2.0b4.jar">
<CLASSES>
@ -105,4 +105,3 @@
</orderEntry>
</component>
</module>

8
OsmAnd/res/drawable/background_tab.xml Normal file
View file

@ -0,0 +1,8 @@
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" android:exitFadeDuration="@android:integer/config_shortAnimTime">
<item android:state_pressed="true" android:drawable="@color/background_tab_pressed" />
<item android:state_focused="true" android:drawable="@color/background_tab_pressed"/>
<item android:drawable="@android:color/transparent"/>
</selector>

5
OsmAnd/res/layout/search_main.xml
View file

@ -5,10 +5,11 @@
android:orientation="vertical"
android:layout_marginTop="?attr/actionBarSize">
<com.example.android.common.view.SlidingTabLayout
<net.osmand.plus.views.controls.PagerSlidingTabStrip
android:id="@+id/sliding_tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"/>
<android.support.v4.view.ViewPager

8
OsmAnd/res/layout/tab.xml Normal file
View file

@ -0,0 +1,8 @@
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/tab_title"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:singleLine="true" />

28
OsmAnd/res/values/attrs.xml
View file

@ -7,4 +7,32 @@
<attr name="expandable_category_color" format="reference"/>
<attr name="reset_image" format="reference"/>
</declare-styleable>
<declare-styleable name="PagerSlidingTabStrip">
<attr name="pstsIndicatorColor" format="color" />
<attr name="pstsUnderlineColor" format="color" />
<attr name="pstsDividerColor" format="color" />
<attr name="pstsDividerWidth" format="dimension" />
<attr name="pstsIndicatorHeight" format="dimension" />
<attr name="pstsUnderlineHeight" format="dimension" />
<attr name="pstsDividerPadding" format="dimension" />
<attr name="pstsTabPaddingLeftRight" format="dimension" />
<attr name="pstsScrollOffset" format="dimension" />
<attr name="pstsTabBackground" format="reference" />
<attr name="pstsShouldExpand" format="boolean" />
<attr name="pstsTextAllCaps" format="boolean" />
<attr name="pstsPaddingMiddle" format="boolean" />
<attr name="pstsTextStyle">
<flag name="normal" value="0x0" />
<flag name="bold" value="0x1" />
<flag name="italic" value="0x2" />
</attr>
<attr name="pstsTextSelectedStyle">
<flag name="normal" value="0x0" />
<flag name="bold" value="0x1" />
<flag name="italic" value="0x2" />
</attr>
<attr name="pstsTextAlpha" format="float" />
<attr name="pstsTextSelectedAlpha" format="float" />
</declare-styleable>
</resources>

2
OsmAnd/res/values/colors.xml
View file

@ -14,6 +14,8 @@
<color name="gpx_time_span_color">#0080FF</color>
<color name="background_tab_pressed">#1AFFFFFF</color>
<color name="color_transparent">#00000000</color>
<color name="color_favorite">#eecc22</color>
<!-- style colors -->

12
OsmAnd/src/net/osmand/plus/activities/search/SearchActivity.java
View file

@ -19,6 +19,7 @@ import net.osmand.plus.R;
import net.osmand.plus.activities.FavouritesListActivity;
import net.osmand.plus.activities.FavouritesListFragment;
import net.osmand.plus.activities.NavigatePointFragment;
import net.osmand.plus.views.controls.PagerSlidingTabStrip;
import net.osmand.util.Algorithms;
import android.app.ActionBar;
import android.content.Intent;
@ -73,8 +74,6 @@ public class SearchActivity extends ActionBarActivity implements OsmAndLocationL
private boolean showOnlyOneTab;
private List<TabItem> mTabs = new ArrayList<TabItem>();
private ViewPager mViewPager;
private SlidingTabLayout mSlidingTabLayout;
public interface SearchActivityChild {
@ -115,14 +114,15 @@ public class SearchActivity extends ActionBarActivity implements OsmAndLocationL
showOnlyOneTab = getIntent() != null && getIntent().getBooleanExtra(SHOW_ONLY_ONE_TAB, false);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("");
getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#39464d")));
getSupportActionBar().setElevation(0);
// getSupportActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#39464d")));
// getSupportActionBar().setTitle(R.string.select_search_position);
if (!showOnlyOneTab) {
mViewPager = (ViewPager)findViewById(R.id.pager);
mSlidingTabLayout = (SlidingTabLayout) findViewById(R.id.sliding_tabs);
ViewPager mViewPager = (ViewPager) findViewById(R.id.pager);
PagerSlidingTabStrip mSlidingTabLayout = (PagerSlidingTabStrip) findViewById(R.id.sliding_tabs);
mTabs.add(getTabIndicator(R.drawable.tab_search_poi_icon, R.string.poi, getFragment(POI_TAB_INDEX)));
mTabs.add(getTabIndicator(R.drawable.tab_search_address_icon, R.string.address, getFragment(ADDRESS_TAB_INDEX)));
@ -419,7 +419,6 @@ public class SearchActivity extends ActionBarActivity implements OsmAndLocationL
/**
* Return the {@link android.support.v4.app.Fragment} to be displayed at {@code position}.
* <p>
* Here we return the value returned from {@link SamplePagerItem#createFragment()}.
*/
@Override
public Fragment getItem(int i) {
@ -440,7 +439,6 @@ public class SearchActivity extends ActionBarActivity implements OsmAndLocationL
* Return the title of the item at {@code position}. This is important as what this method
* returns is what is displayed in the {@link SlidingTabLayout}.
* <p>
* Here we return the value returned from {@link SamplePagerItem#getTitle()}.
*/
@Override
public CharSequence getPageTitle(int position) {

778
OsmAnd/src/net/osmand/plus/views/controls/PagerSlidingTabStrip.java Normal file
View file

@ -0,0 +1,778 @@
/*
* 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 net.osmand.plus.views.controls;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.ColorStateList;
import android.content.res.TypedArray;
import android.database.DataSetObserver;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Typeface;
import android.os.Build;
import android.os.Parcel;
import android.os.Parcelable;
import android.support.v4.util.Pair;
import android.support.v4.view.ViewCompat;
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.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.TextView;
import net.osmand.plus.R;
import java.util.Locale;
public class PagerSlidingTabStrip extends HorizontalScrollView {
private static final float OPAQUE = 1.0f;
private static final float HALF_TRANSP = 0.5f;
public interface CustomTabProvider {
public View getCustomTabView(ViewGroup parent, int position);
}
public interface OnTabReselectedListener {
public void onTabReselected(int position);
}
// @formatter:off
private static final int[] ATTRS = new int[]{
android.R.attr.textColorPrimary,
android.R.attr.textSize,
android.R.attr.textColor,
android.R.attr.paddingLeft,
android.R.attr.paddingRight,
};
// @formatter:on
private final PagerAdapterObserver adapterObserver = new PagerAdapterObserver();
//These indexes must be related with the ATTR array above
private static final int TEXT_COLOR_PRIMARY = 0;
private static final int TEXT_SIZE_INDEX = 1;
private static final int TEXT_COLOR_INDEX = 2;
private static final int PADDING_LEFT_INDEX = 3;
private static final int PADDING_RIGHT_INDEX = 4;
private LinearLayout.LayoutParams defaultTabLayoutParams;
private LinearLayout.LayoutParams expandedTabLayoutParams;
private final PageListener pageListener = new PageListener();
private OnTabReselectedListener tabReselectedListener = null;
public OnPageChangeListener delegatePageListener;
private LinearLayout tabsContainer;
private ViewPager pager;
private int tabCount;
private int currentPosition = 0;
private float currentPositionOffset = 0f;
private Paint rectPaint;
private Paint dividerPaint;
private int indicatorColor;
private int indicatorHeight = 2;
private int underlineHeight = 0;
private int underlineColor;
private int dividerWidth = 0;
private int dividerPadding = 0;
private int dividerColor;
private int tabPadding = 12;
private int tabTextSize = 14;
private ColorStateList tabTextColor = null;
private float tabTextAlpha = HALF_TRANSP;
private float tabTextSelectedAlpha = OPAQUE;
private int padding = 0;
private boolean shouldExpand = false;
private boolean textAllCaps = true;
private boolean isPaddingMiddle = false;
private Typeface tabTypeface = null;
private int tabTypefaceStyle = Typeface.BOLD;
private int tabTypefaceSelectedStyle = Typeface.BOLD;
private int scrollOffset;
private int lastScrollX = 0;
private int tabBackgroundResId = R.drawable.background_tab;
private Locale locale;
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_DIP, 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);
tabTextSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, tabTextSize, dm);
// get system attrs (android:textSize and android:textColor)
TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);
tabTextSize = a.getDimensionPixelSize(TEXT_SIZE_INDEX, tabTextSize);
ColorStateList colorStateList = a.getColorStateList(TEXT_COLOR_INDEX);
int textPrimaryColor = a.getColor(TEXT_COLOR_PRIMARY, android.R.color.white);
if (colorStateList != null) {
tabTextColor = colorStateList;
} else {
tabTextColor = getColorStateList(textPrimaryColor);
}
underlineColor = textPrimaryColor;
dividerColor = textPrimaryColor;
indicatorColor = textPrimaryColor;
int paddingLeft = a.getDimensionPixelSize(PADDING_LEFT_INDEX, padding);
int paddingRight = a.getDimensionPixelSize(PADDING_RIGHT_INDEX, padding);
a.recycle();
//In case we have the padding they must be equal so we take the biggest
padding = Math.max(paddingLeft, paddingRight);
// 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);
dividerWidth = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsDividerWidth, dividerWidth);
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);
tabBackgroundResId = a.getResourceId(R.styleable.PagerSlidingTabStrip_pstsTabBackground, tabBackgroundResId);
shouldExpand = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsShouldExpand, shouldExpand);
scrollOffset = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsScrollOffset, scrollOffset);
textAllCaps = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsTextAllCaps, textAllCaps);
isPaddingMiddle = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsPaddingMiddle, isPaddingMiddle);
tabTypefaceStyle = a.getInt(R.styleable.PagerSlidingTabStrip_pstsTextStyle, Typeface.BOLD);
tabTypefaceSelectedStyle = a.getInt(R.styleable.PagerSlidingTabStrip_pstsTextSelectedStyle, Typeface.BOLD);
tabTextAlpha = a.getFloat(R.styleable.PagerSlidingTabStrip_pstsTextAlpha, HALF_TRANSP);
tabTextSelectedAlpha = a.getFloat(R.styleable.PagerSlidingTabStrip_pstsTextSelectedAlpha, OPAQUE);
a.recycle();
setMarginBottomTabContainer();
rectPaint = new Paint();
rectPaint.setAntiAlias(true);
rectPaint.setStyle(Style.FILL);
dividerPaint = new Paint();
dividerPaint.setAntiAlias(true);
dividerPaint.setStrokeWidth(dividerWidth);
defaultTabLayoutParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
expandedTabLayoutParams = new LinearLayout.LayoutParams(0, LayoutParams.MATCH_PARENT, 1.0f);
if (locale == null) {
locale = getResources().getConfiguration().locale;
}
}
private void setMarginBottomTabContainer() {
ViewGroup.MarginLayoutParams mlp = (MarginLayoutParams) tabsContainer.getLayoutParams();
int bottomMargin = indicatorHeight >= underlineHeight ? indicatorHeight : underlineHeight;
mlp.setMargins(mlp.leftMargin, mlp.topMargin, mlp.rightMargin, bottomMargin);
tabsContainer.setLayoutParams(mlp);
}
public void setViewPager(ViewPager pager) {
this.pager = pager;
if (pager.getAdapter() == null) {
throw new IllegalStateException("ViewPager does not have adapter instance.");
}
pager.setOnPageChangeListener(pageListener);
pager.getAdapter().registerDataSetObserver(adapterObserver);
adapterObserver.setAttached(true);
notifyDataSetChanged();
}
public void notifyDataSetChanged() {
tabsContainer.removeAllViews();
tabCount = pager.getAdapter().getCount();
View tabView;
for (int i = 0; i < tabCount; i++) {
if (pager.getAdapter() instanceof CustomTabProvider) {
tabView = ((CustomTabProvider) pager.getAdapter()).getCustomTabView(this, i);
} else {
tabView = LayoutInflater.from(getContext()).inflate(R.layout.tab, this, false);
}
CharSequence title = pager.getAdapter().getPageTitle(i);
addTab(i, title, tabView);
}
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();
currentPositionOffset = 0f;
scrollToChild(currentPosition, 0);
updateSelection(currentPosition);
}
});
}
private void addTab(final int position, CharSequence title, View tabView) {
TextView textView = (TextView) tabView.findViewById(R.id.tab_title);
if (textView != null) {
if (title != null) textView.setText(title);
float alpha = pager.getCurrentItem() == position ? tabTextSelectedAlpha : tabTextAlpha;
ViewCompat.setAlpha(textView, alpha);
}
tabView.setFocusable(true);
tabView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (pager.getCurrentItem() != position) {
View tab = tabsContainer.getChildAt(pager.getCurrentItem());
notSelected(tab);
pager.setCurrentItem(position);
} else if (tabReselectedListener != null) {
tabReselectedListener.onTabReselected(position);
}
}
});
tabsContainer.addView(tabView, position, shouldExpand ? expandedTabLayoutParams : defaultTabLayoutParams);
}
private void updateTabStyles() {
for (int i = 0; i < tabCount; i++) {
View v = tabsContainer.getChildAt(i);
v.setBackgroundResource(tabBackgroundResId);
v.setPadding(tabPadding, v.getPaddingTop(), tabPadding, v.getPaddingBottom());
TextView tab_title = (TextView) v.findViewById(R.id.tab_title);
if (tab_title != null) {
tab_title.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize);
tab_title.setTypeface(tabTypeface, pager.getCurrentItem() == i ? tabTypefaceSelectedStyle : tabTypefaceStyle);
if (tabTextColor != null) {
tab_title.setTextColor(tabTextColor);
}
// setAllCaps() is only available from API 14, so the upper case is made manually if we are on a
// pre-ICS-build
if (textAllCaps) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
tab_title.setAllCaps(true);
} else {
tab_title.setText(tab_title.getText().toString().toUpperCase(locale));
}
}
}
}
}
private void scrollToChild(int position, int offset) {
if (tabCount == 0) {
return;
}
int newScrollX = tabsContainer.getChildAt(position).getLeft() + offset;
if (position > 0 || offset > 0) {
//Half screen offset.
//- Either tabs start at the middle of the view scrolling straight away
//- Or tabs start at the begging (no padding) scrolling when indicator gets
// to the middle of the view width
newScrollX -= scrollOffset;
Pair<Float, Float> lines = getIndicatorCoordinates();
newScrollX += ((lines.second - lines.first) / 2);
}
if (newScrollX != lastScrollX) {
lastScrollX = newScrollX;
scrollTo(newScrollX, 0);
}
}
private Pair<Float, Float> getIndicatorCoordinates() {
// 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);
}
return new Pair<Float, Float>(lineLeft, lineRight);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
if (isPaddingMiddle || padding > 0) {
//Make sure tabContainer is bigger than the HorizontalScrollView to be able to scroll
tabsContainer.setMinimumWidth(getWidth());
//Clipping padding to false to see the tabs while we pass them swiping
setClipToPadding(false);
}
if (tabsContainer.getChildCount() > 0) {
tabsContainer
.getChildAt(0)
.getViewTreeObserver()
.addOnGlobalLayoutListener(firstTabGlobalLayoutListener);
}
super.onLayout(changed, l, t, r, b);
}
private OnGlobalLayoutListener firstTabGlobalLayoutListener = new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
View view = tabsContainer.getChildAt(0);
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
getViewTreeObserver().removeGlobalOnLayoutListener(this);
} else {
getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
if (isPaddingMiddle) {
int mHalfWidthFirstTab = view.getWidth() / 2;
padding = getWidth() / 2 - mHalfWidthFirstTab;
}
setPadding(padding, getPaddingTop(), padding, getPaddingBottom());
if (scrollOffset == 0) scrollOffset = getWidth() / 2 - padding;
}
};
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (isInEditMode() || tabCount == 0) {
return;
}
final int height = getHeight();
// draw indicator line
rectPaint.setColor(indicatorColor);
Pair<Float, Float> lines = getIndicatorCoordinates();
canvas.drawRect(lines.first + padding, height - indicatorHeight, lines.second + padding, height, rectPaint);
// draw underline
rectPaint.setColor(underlineColor);
canvas.drawRect(padding, height - underlineHeight, tabsContainer.getWidth() + padding, height, rectPaint);
// draw divider
if (dividerWidth != 0) {
dividerPaint.setStrokeWidth(dividerWidth);
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 setOnTabReselectedListener(OnTabReselectedListener tabReselectedListener) {
this.tabReselectedListener = tabReselectedListener;
}
public void setOnPageChangeListener(OnPageChangeListener listener) {
this.delegatePageListener = listener;
}
private class PageListener implements OnPageChangeListener {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
currentPosition = position;
currentPositionOffset = positionOffset;
int offset = tabCount > 0 ? (int) (positionOffset * tabsContainer.getChildAt(position).getWidth()) : 0;
scrollToChild(position, offset);
invalidate();
if (delegatePageListener != null) {
delegatePageListener.onPageScrolled(position, positionOffset, positionOffsetPixels);
}
}
@Override
public void onPageScrollStateChanged(int state) {
if (state == ViewPager.SCROLL_STATE_IDLE) {
scrollToChild(pager.getCurrentItem(), 0);
}
//Full alpha for current item
View currentTab = tabsContainer.getChildAt(pager.getCurrentItem());
selected(currentTab);
//Half transparent for prev item
if (pager.getCurrentItem() - 1 >= 0) {
View prevTab = tabsContainer.getChildAt(pager.getCurrentItem() - 1);
notSelected(prevTab);
}
//Half transparent for next item
if (pager.getCurrentItem() + 1 <= pager.getAdapter().getCount() - 1) {
View nextTab = tabsContainer.getChildAt(pager.getCurrentItem() + 1);
notSelected(nextTab);
}
if (delegatePageListener != null) {
delegatePageListener.onPageScrollStateChanged(state);
}
}
@Override
public void onPageSelected(int position) {
updateSelection(position);
if (delegatePageListener != null) {
delegatePageListener.onPageSelected(position);
}
}
}
private void updateSelection(int position) {
for (int i = 0; i < tabCount; ++i) {
View tv = tabsContainer.getChildAt(i);
final boolean selected = i == position;
tv.setSelected(selected);
if (selected) {
selected(tv);
} else {
notSelected(tv);
}
}
}
private void notSelected(View tab) {
if (tab != null) {
TextView title = (TextView) tab.findViewById(R.id.tab_title);
if (title != null) {
title.setTypeface(tabTypeface, tabTypefaceStyle);
ViewCompat.setAlpha(title, tabTextAlpha);
}
}
}
private void selected(View tab) {
if (tab != null) {
TextView title = (TextView) tab.findViewById(R.id.tab_title);
if (title != null) {
title.setTypeface(tabTypeface, tabTypefaceSelectedStyle);
ViewCompat.setAlpha(title, tabTextSelectedAlpha);
}
}
}
private class PagerAdapterObserver extends DataSetObserver {
private boolean attached = false;
@Override
public void onChanged() {
notifyDataSetChanged();
}
public void setAttached(boolean attached) {
this.attached = attached;
}
public boolean isAttached() {
return attached;
}
}
@Override
protected void onAttachedToWindow() {
super.onAttachedToWindow();
if (pager != null) {
if (!adapterObserver.isAttached()) {
pager.getAdapter().registerDataSetObserver(adapterObserver);
adapterObserver.setAttached(true);
}
}
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
if (pager != null) {
if (adapterObserver.isAttached()) {
pager.getAdapter().unregisterDataSetObserver(adapterObserver);
adapterObserver.setAttached(false);
}
}
}
@Override
public void onRestoreInstanceState(Parcelable state) {
SavedState savedState = (SavedState) state;
super.onRestoreInstanceState(savedState.getSuperState());
currentPosition = savedState.currentPosition;
if (currentPosition != 0 && tabsContainer.getChildCount() > 0) {
notSelected(tabsContainer.getChildAt(0));
selected(tabsContainer.getChildAt(currentPosition));
}
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 int getIndicatorColor() {
return this.indicatorColor;
}
public int getIndicatorHeight() {
return indicatorHeight;
}
public int getUnderlineColor() {
return underlineColor;
}
public int getDividerColor() {
return dividerColor;
}
public int getDividerWidth() {
return dividerWidth;
}
public int getUnderlineHeight() {
return underlineHeight;
}
public int getDividerPadding() {
return dividerPadding;
}
public int getScrollOffset() {
return scrollOffset;
}
public boolean getShouldExpand() {
return shouldExpand;
}
public int getTextSize() {
return tabTextSize;
}
public boolean isTextAllCaps() {
return textAllCaps;
}
public ColorStateList getTextColor() {
return tabTextColor;
}
public int getTabBackground() {
return tabBackgroundResId;
}
public int getTabPaddingLeftRight() {
return tabPadding;
}
public void setIndicatorColor(int indicatorColor) {
this.indicatorColor = indicatorColor;
invalidate();
}
public void setIndicatorColorResource(int resId) {
this.indicatorColor = getResources().getColor(resId);
invalidate();
}
public void setIndicatorHeight(int indicatorLineHeightPx) {
this.indicatorHeight = indicatorLineHeightPx;
invalidate();
}
public void setUnderlineColor(int underlineColor) {
this.underlineColor = underlineColor;
invalidate();
}
public void setUnderlineColorResource(int resId) {
this.underlineColor = getResources().getColor(resId);
invalidate();
}
public void setDividerColor(int dividerColor) {
this.dividerColor = dividerColor;
invalidate();
}
public void setDividerColorResource(int resId) {
this.dividerColor = getResources().getColor(resId);
invalidate();
}
public void setDividerWidth(int dividerWidthPx) {
this.dividerWidth = dividerWidthPx;
invalidate();
}
public void setUnderlineHeight(int underlineHeightPx) {
this.underlineHeight = underlineHeightPx;
invalidate();
}
public void setDividerPadding(int dividerPaddingPx) {
this.dividerPadding = dividerPaddingPx;
invalidate();
}
public void setScrollOffset(int scrollOffsetPx) {
this.scrollOffset = scrollOffsetPx;
invalidate();
}
public void setShouldExpand(boolean shouldExpand) {
this.shouldExpand = shouldExpand;
if (pager != null) {
requestLayout();
}
}
public void setAllCaps(boolean textAllCaps) {
this.textAllCaps = textAllCaps;
}
public void setTextSize(int textSizePx) {
this.tabTextSize = textSizePx;
updateTabStyles();
}
public void setTextColor(int textColor) {
setTextColor(getColorStateList(textColor));
}
private ColorStateList getColorStateList(int textColor) {
return new ColorStateList(new int[][]{new int[]{}}, new int[]{textColor});
}
public void setTextColor(ColorStateList colorStateList) {
this.tabTextColor = colorStateList;
updateTabStyles();
}
public void setTextColorResource(int resId) {
setTextColor(getResources().getColor(resId));
}
public void setTextColorStateListResource(int resId) {
setTextColor(getResources().getColorStateList(resId));
}
public void setTypeface(Typeface typeface, int style) {
this.tabTypeface = typeface;
this.tabTypefaceSelectedStyle = style;
updateTabStyles();
}
public void setTabBackground(int resId) {
this.tabBackgroundResId = resId;
}
public void setTabPaddingLeftRight(int paddingPx) {
this.tabPadding = paddingPx;
updateTabStyles();
}
}