--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/astuetz/viewpager/extensions/PagerSlidingTabStrip.java Wed May 15 11:35:03 2013 +0200
@@ -0,0 +1,618 @@
+/*
+ * 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.astuetz.viewpager.extensions;
+
+import java.util.Locale;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.content.res.TypedArray;
+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.view.ViewPager;
+import android.support.v4.view.ViewPager.OnPageChangeListener;
+import android.util.AttributeSet;
+import android.util.DisplayMetrics;
+import android.util.TypedValue;
+import android.view.Gravity;
+import android.view.View;
+import android.view.ViewTreeObserver.OnGlobalLayoutListener;
+import android.widget.HorizontalScrollView;
+import android.widget.ImageButton;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import com.beem.project.beem.R;
+
+public class PagerSlidingTabStrip extends HorizontalScrollView {
+
+ public interface IconTabProvider {
+ public int getPageIconResId(int position);
+ }
+
+ // @formatter:off
+ private static final int[] ATTRS = new int[] {
+ android.R.attr.textSize,
+ android.R.attr.textColor
+ };
+ // @formatter:on
+
+ private LinearLayout.LayoutParams defaultTabLayoutParams;
+ private LinearLayout.LayoutParams expandedTabLayoutParams;
+
+ private final PageListener pageListener = new PageListener();
+ 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 boolean checkedTabWidths = false;
+
+ private int indicatorColor = 0xFF666666;
+ private int underlineColor = 0x1A000000;
+ private int dividerColor = 0x1A000000;
+
+ private boolean shouldExpand = false;
+ private boolean textAllCaps = true;
+
+ private int scrollOffset = 52;
+ private int indicatorHeight = 8;
+ private int underlineHeight = 2;
+ private int dividerPadding = 12;
+ private int tabPadding = 24;
+ private int dividerWidth = 1;
+
+ private int tabTextSize = 12;
+ private int tabTextColor = 0xFF666666;
+ private Typeface tabTypeface = null;
+ private int tabTypefaceStyle = Typeface.BOLD;
+
+ 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(0, tabTextSize);
+ tabTextColor = a.getColor(1, tabTextColor);
+
+ a.recycle();
+
+ // get custom attrs
+
+ a = context.obtainStyledAttributes(attrs, R.styleable.PagerSlidingTabStrip);
+
+ indicatorColor = a.getColor(R.styleable.PagerSlidingTabStrip_indicatorColor, indicatorColor);
+ underlineColor = a.getColor(R.styleable.PagerSlidingTabStrip_underlineColor, underlineColor);
+ dividerColor = a.getColor(R.styleable.PagerSlidingTabStrip_dividerColor, dividerColor);
+ indicatorHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_indicatorHeight, indicatorHeight);
+ underlineHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_underlineHeight, underlineHeight);
+ dividerPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_dividerPadding, dividerPadding);
+ tabPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_tabPaddingLeftRight, tabPadding);
+ tabBackgroundResId = a.getResourceId(R.styleable.PagerSlidingTabStrip_tabBackground, tabBackgroundResId);
+ shouldExpand = a.getBoolean(R.styleable.PagerSlidingTabStrip_shouldExpand, shouldExpand);
+ scrollOffset = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_scrollOffset, scrollOffset);
+ textAllCaps = a.getBoolean(R.styleable.PagerSlidingTabStrip_textAllCaps, textAllCaps);
+
+ a.recycle();
+
+ 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;
+ }
+ }
+
+ public void setViewPager(ViewPager pager) {
+ this.pager = pager;
+
+ if (pager.getAdapter() == null) {
+ throw new IllegalStateException("ViewPager does not have adapter instance.");
+ }
+
+ pager.setOnPageChangeListener(pageListener);
+
+ notifyDataSetChanged();
+ }
+
+ public void setOnPageChangeListener(OnPageChangeListener listener) {
+ this.delegatePageListener = listener;
+ }
+
+ public void notifyDataSetChanged() {
+
+ tabsContainer.removeAllViews();
+
+ tabCount = pager.getAdapter().getCount();
+
+ for (int i = 0; i < tabCount; i++) {
+
+ if (pager.getAdapter() instanceof IconTabProvider) {
+ addIconTab(i, ((IconTabProvider) pager.getAdapter()).getPageIconResId(i));
+ } else {
+ addTextTab(i, pager.getAdapter().getPageTitle(i).toString());
+ }
+
+ }
+
+ updateTabStyles();
+
+ checkedTabWidths = false;
+
+ 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();
+ scrollToChild(currentPosition, 0);
+ }
+ });
+
+ }
+
+ private void addTextTab(final int position, String title) {
+
+ TextView tab = new TextView(getContext());
+ tab.setText(title);
+ tab.setFocusable(true);
+ tab.setGravity(Gravity.CENTER);
+ tab.setSingleLine();
+
+ tab.setOnClickListener(new OnClickListener() {
+ @Override
+ public void onClick(View v) {
+ pager.setCurrentItem(position);
+ }
+ });
+
+ tabsContainer.addView(tab);
+
+ }
+
+ private void addIconTab(final int position, int resId) {
+
+ ImageButton tab = new ImageButton(getContext());
+ tab.setFocusable(true);
+ tab.setImageResource(resId);
+
+ tab.setOnClickListener(new OnClickListener() {
+ @Override
+ public void onClick(View v) {
+ pager.setCurrentItem(position);
+ }
+ });
+
+ tabsContainer.addView(tab);
+
+ }
+
+ private void updateTabStyles() {
+
+ for (int i = 0; i < tabCount; i++) {
+
+ View v = tabsContainer.getChildAt(i);
+
+ v.setLayoutParams(defaultTabLayoutParams);
+ v.setBackgroundResource(tabBackgroundResId);
+ if (shouldExpand) {
+ v.setPadding(0, 0, 0, 0);
+ } else {
+ v.setPadding(tabPadding, 0, tabPadding, 0);
+ }
+
+ if (v instanceof TextView) {
+
+ TextView tab = (TextView) v;
+ tab.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize);
+ tab.setTypeface(tabTypeface, tabTypefaceStyle);
+ tab.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.setAllCaps(true);
+ } else {
+ tab.setText(tab.getText().toString().toUpperCase(locale));
+ }
+ }
+ }
+ }
+
+ }
+
+ @Override
+ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+ super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+ if (!shouldExpand || MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.UNSPECIFIED) {
+ return;
+ }
+
+ int myWidth = getMeasuredWidth();
+ int childWidth = 0;
+ for (int i = 0; i < tabCount; i++) {
+ childWidth += tabsContainer.getChildAt(i).getMeasuredWidth();
+ }
+
+ if (!checkedTabWidths && childWidth > 0 && myWidth > 0) {
+
+ if (childWidth <= myWidth) {
+ for (int i = 0; i < tabCount; i++) {
+ tabsContainer.getChildAt(i).setLayoutParams(expandedTabLayoutParams);
+ }
+ }
+
+ checkedTabWidths = true;
+ }
+ }
+
+ 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 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 underline
+
+ rectPaint.setColor(underlineColor);
+ canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), 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);
+ }
+ }
+
+ private class PageListener implements OnPageChangeListener {
+
+ @Override
+ public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
+
+ currentPosition = position;
+ currentPositionOffset = positionOffset;
+
+ scrollToChild(position, (int) (positionOffset * tabsContainer.getChildAt(position).getWidth()));
+
+ 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);
+ }
+
+ if (delegatePageListener != null) {
+ delegatePageListener.onPageScrollStateChanged(state);
+ }
+ }
+
+ @Override
+ public void onPageSelected(int position) {
+ if (delegatePageListener != null) {
+ delegatePageListener.onPageSelected(position);
+ }
+ }
+
+ }
+
+ 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 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 void setShouldExpand(boolean shouldExpand) {
+ this.shouldExpand = shouldExpand;
+ requestLayout();
+ }
+
+ public boolean getShouldExpand() {
+ return shouldExpand;
+ }
+
+ public boolean isTextAllCaps() {
+ return textAllCaps;
+ }
+
+ public void setAllCaps(boolean textAllCaps) {
+ this.textAllCaps = textAllCaps;
+ }
+
+ public void setTextSize(int textSizePx) {
+ this.tabTextSize = textSizePx;
+ updateTabStyles();
+ }
+
+ public int getTextSize() {
+ return tabTextSize;
+ }
+
+ public void setTextColor(int textColor) {
+ this.tabTextColor = textColor;
+ updateTabStyles();
+ }
+
+ public void setTextColorResource(int resId) {
+ this.tabTextColor = getResources().getColor(resId);
+ updateTabStyles();
+ }
+
+ public int getTextColor() {
+ return tabTextColor;
+ }
+
+ public void setTypeface(Typeface typeface, int style) {
+ this.tabTypeface = typeface;
+ this.tabTypefaceStyle = style;
+ updateTabStyles();
+ }
+
+ public void setTabBackground(int resId) {
+ this.tabBackgroundResId = resId;
+ }
+
+ public int getTabBackground() {
+ return tabBackgroundResId;
+ }
+
+ public void setTabPaddingLeftRight(int paddingPx) {
+ this.tabPadding = paddingPx;
+ updateTabStyles();
+ }
+
+ public int getTabPaddingLeftRight() {
+ return tabPadding;
+ }
+
+ @Override
+ public void onRestoreInstanceState(Parcelable state) {
+ SavedState savedState = (SavedState) state;
+ super.onRestoreInstanceState(savedState.getSuperState());
+ currentPosition = savedState.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];
+ }
+ };
+ }
+
+}