diff options
Diffstat (limited to 'com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/ScrollingTabContainerView.java')
| -rw-r--r-- | com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/ScrollingTabContainerView.java | 545 |
1 files changed, 545 insertions, 0 deletions
diff --git a/com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/ScrollingTabContainerView.java b/com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/ScrollingTabContainerView.java new file mode 100644 index 000000000..82b72d8e2 --- /dev/null +++ b/com_actionbarsherlock/src/com/actionbarsherlock/internal/widget/ScrollingTabContainerView.java @@ -0,0 +1,545 @@ +/* + * Copyright (C) 2011 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.actionbarsherlock.internal.widget; + +import android.content.Context; +import android.content.res.Configuration; +import android.content.res.TypedArray; +import android.graphics.drawable.Drawable; +import android.text.TextUtils.TruncateAt; +import android.util.AttributeSet; +import android.view.Gravity; +import android.view.LayoutInflater; +import android.view.View; +import android.view.ViewGroup; +import android.view.ViewParent; +import android.view.animation.DecelerateInterpolator; +import android.view.animation.Interpolator; +import android.widget.BaseAdapter; +import android.widget.HorizontalScrollView; +import android.widget.ImageView; +import android.widget.LinearLayout; +import android.widget.ListView; +import com.actionbarsherlock.R; +import com.actionbarsherlock.app.ActionBar; +import com.actionbarsherlock.internal.nineoldandroids.animation.Animator; +import com.actionbarsherlock.internal.nineoldandroids.animation.ObjectAnimator; + +/** + * This widget implements the dynamic action bar tab behavior that can change + * across different configurations or circumstances. + */ +public class ScrollingTabContainerView extends HorizontalScrollView + implements IcsAdapterView.OnItemSelectedListener { + //UNUSED private static final String TAG = "ScrollingTabContainerView"; + Runnable mTabSelector; + private TabClickListener mTabClickListener; + + private IcsLinearLayout mTabLayout; + private IcsSpinner mTabSpinner; + private boolean mAllowCollapse; + + private LayoutInflater mInflater; + + int mMaxTabWidth; + private int mContentHeight; + private int mSelectedTabIndex; + + protected Animator mVisibilityAnim; + protected final VisibilityAnimListener mVisAnimListener = new VisibilityAnimListener(); + + private static final /*Time*/Interpolator sAlphaInterpolator = new DecelerateInterpolator(); + + private static final int FADE_DURATION = 200; + + public ScrollingTabContainerView(Context context) { + super(context); + setHorizontalScrollBarEnabled(false); + + TypedArray a = getContext().obtainStyledAttributes(null, R.styleable.SherlockActionBar, + R.attr.actionBarStyle, 0); + setContentHeight(a.getLayoutDimension(R.styleable.SherlockActionBar_height, 0)); + a.recycle(); + + mInflater = LayoutInflater.from(context); + + mTabLayout = createTabLayout(); + addView(mTabLayout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, + ViewGroup.LayoutParams.MATCH_PARENT)); + } + + @Override + public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { + final int widthMode = MeasureSpec.getMode(widthMeasureSpec); + final boolean lockedExpanded = widthMode == MeasureSpec.EXACTLY; + setFillViewport(lockedExpanded); + + final int childCount = mTabLayout.getChildCount(); + if (childCount > 1 && + (widthMode == MeasureSpec.EXACTLY || widthMode == MeasureSpec.AT_MOST)) { + if (childCount > 2) { + mMaxTabWidth = (int) (MeasureSpec.getSize(widthMeasureSpec) * 0.4f); + } else { + mMaxTabWidth = MeasureSpec.getSize(widthMeasureSpec) / 2; + } + } else { + mMaxTabWidth = -1; + } + + heightMeasureSpec = MeasureSpec.makeMeasureSpec(mContentHeight, MeasureSpec.EXACTLY); + + final boolean canCollapse = !lockedExpanded && mAllowCollapse; + + if (canCollapse) { + // See if we should expand + mTabLayout.measure(MeasureSpec.UNSPECIFIED, heightMeasureSpec); + if (mTabLayout.getMeasuredWidth() > MeasureSpec.getSize(widthMeasureSpec)) { + performCollapse(); + } else { + performExpand(); + } + } else { + performExpand(); + } + + final int oldWidth = getMeasuredWidth(); + super.onMeasure(widthMeasureSpec, heightMeasureSpec); + final int newWidth = getMeasuredWidth(); + + if (lockedExpanded && oldWidth != newWidth) { + // Recenter the tab display if we're at a new (scrollable) size. + setTabSelected(mSelectedTabIndex); + } + } + + /** + * Indicates whether this view is collapsed into a dropdown menu instead + * of traditional tabs. + * @return true if showing as a spinner + */ + private boolean isCollapsed() { + return mTabSpinner != null && mTabSpinner.getParent() == this; + } + + public void setAllowCollapse(boolean allowCollapse) { + mAllowCollapse = allowCollapse; + } + + private void performCollapse() { + if (isCollapsed()) return; + + if (mTabSpinner == null) { + mTabSpinner = createSpinner(); + } + removeView(mTabLayout); + addView(mTabSpinner, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, + ViewGroup.LayoutParams.MATCH_PARENT)); + if (mTabSpinner.getAdapter() == null) { + mTabSpinner.setAdapter(new TabAdapter()); + } + if (mTabSelector != null) { + removeCallbacks(mTabSelector); + mTabSelector = null; + } + mTabSpinner.setSelection(mSelectedTabIndex); + } + + private boolean performExpand() { + if (!isCollapsed()) return false; + + removeView(mTabSpinner); + addView(mTabLayout, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, + ViewGroup.LayoutParams.MATCH_PARENT)); + setTabSelected(mTabSpinner.getSelectedItemPosition()); + return false; + } + + public void setTabSelected(int position) { + mSelectedTabIndex = position; + final int tabCount = mTabLayout.getChildCount(); + for (int i = 0; i < tabCount; i++) { + final View child = mTabLayout.getChildAt(i); + final boolean isSelected = i == position; + child.setSelected(isSelected); + if (isSelected) { + animateToTab(position); + } + } + } + + public void setContentHeight(int contentHeight) { + mContentHeight = contentHeight; + requestLayout(); + } + + private IcsLinearLayout createTabLayout() { + final IcsLinearLayout tabLayout = (IcsLinearLayout) LayoutInflater.from(getContext()) + .inflate(R.layout.abs__action_bar_tab_bar_view, null); + tabLayout.setLayoutParams(new LinearLayout.LayoutParams( + LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.MATCH_PARENT)); + return tabLayout; + } + + private IcsSpinner createSpinner() { + final IcsSpinner spinner = new IcsSpinner(getContext(), null, + R.attr.actionDropDownStyle); + spinner.setLayoutParams(new LinearLayout.LayoutParams( + LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.MATCH_PARENT)); + spinner.setOnItemSelectedListener(this); + return spinner; + } + + @Override + protected void onConfigurationChanged(Configuration newConfig) { + super.onConfigurationChanged(newConfig); + + // Action bar can change size on configuration changes. + // Reread the desired height from the theme-specified style. + TypedArray a = getContext().obtainStyledAttributes(null, R.styleable.SherlockActionBar, + R.attr.actionBarStyle, 0); + setContentHeight(a.getLayoutDimension(R.styleable.SherlockActionBar_height, 0)); + a.recycle(); + } + + public void animateToVisibility(int visibility) { + if (mVisibilityAnim != null) { + mVisibilityAnim.cancel(); + } + if (visibility == VISIBLE) { + if (getVisibility() != VISIBLE) { + setAlpha(0); + } + ObjectAnimator anim = ObjectAnimator.ofFloat(this, "alpha", 1); + anim.setDuration(FADE_DURATION); + anim.setInterpolator(sAlphaInterpolator); + + anim.addListener(mVisAnimListener.withFinalVisibility(visibility)); + anim.start(); + } else { + ObjectAnimator anim = ObjectAnimator.ofFloat(this, "alpha", 0); + anim.setDuration(FADE_DURATION); + anim.setInterpolator(sAlphaInterpolator); + + anim.addListener(mVisAnimListener.withFinalVisibility(visibility)); + anim.start(); + } + } + + public void animateToTab(final int position) { + final View tabView = mTabLayout.getChildAt(position); + if (mTabSelector != null) { + removeCallbacks(mTabSelector); + } + mTabSelector = new Runnable() { + public void run() { + final int scrollPos = tabView.getLeft() - (getWidth() - tabView.getWidth()) / 2; + smoothScrollTo(scrollPos, 0); + mTabSelector = null; + } + }; + post(mTabSelector); + } + + @Override + public void onAttachedToWindow() { + super.onAttachedToWindow(); + if (mTabSelector != null) { + // Re-post the selector we saved + post(mTabSelector); + } + } + + @Override + public void onDetachedFromWindow() { + super.onDetachedFromWindow(); + if (mTabSelector != null) { + removeCallbacks(mTabSelector); + } + } + + private TabView createTabView(ActionBar.Tab tab, boolean forAdapter) { + //Workaround for not being able to pass a defStyle on pre-3.0 + final TabView tabView = (TabView)mInflater.inflate(R.layout.abs__action_bar_tab, null); + tabView.init(this, tab, forAdapter); + + if (forAdapter) { + tabView.setBackgroundDrawable(null); + tabView.setLayoutParams(new ListView.LayoutParams(ListView.LayoutParams.MATCH_PARENT, + mContentHeight)); + } else { + tabView.setFocusable(true); + + if (mTabClickListener == null) { + mTabClickListener = new TabClickListener(); + } + tabView.setOnClickListener(mTabClickListener); + } + return tabView; + } + + public void addTab(ActionBar.Tab tab, boolean setSelected) { + TabView tabView = createTabView(tab, false); + mTabLayout.addView(tabView, new IcsLinearLayout.LayoutParams(0, + LayoutParams.MATCH_PARENT, 1)); + if (mTabSpinner != null) { + ((TabAdapter) mTabSpinner.getAdapter()).notifyDataSetChanged(); + } + if (setSelected) { + tabView.setSelected(true); + } + if (mAllowCollapse) { + requestLayout(); + } + } + + public void addTab(ActionBar.Tab tab, int position, boolean setSelected) { + final TabView tabView = createTabView(tab, false); + mTabLayout.addView(tabView, position, new IcsLinearLayout.LayoutParams( + 0, LayoutParams.MATCH_PARENT, 1)); + if (mTabSpinner != null) { + ((TabAdapter) mTabSpinner.getAdapter()).notifyDataSetChanged(); + } + if (setSelected) { + tabView.setSelected(true); + } + if (mAllowCollapse) { + requestLayout(); + } + } + + public void updateTab(int position) { + ((TabView) mTabLayout.getChildAt(position)).update(); + if (mTabSpinner != null) { + ((TabAdapter) mTabSpinner.getAdapter()).notifyDataSetChanged(); + } + if (mAllowCollapse) { + requestLayout(); + } + } + + public void removeTabAt(int position) { + mTabLayout.removeViewAt(position); + if (mTabSpinner != null) { + ((TabAdapter) mTabSpinner.getAdapter()).notifyDataSetChanged(); + } + if (mAllowCollapse) { + requestLayout(); + } + } + + public void removeAllTabs() { + mTabLayout.removeAllViews(); + if (mTabSpinner != null) { + ((TabAdapter) mTabSpinner.getAdapter()).notifyDataSetChanged(); + } + if (mAllowCollapse) { + requestLayout(); + } + } + + @Override + public void onItemSelected(IcsAdapterView<?> parent, View view, int position, long id) { + TabView tabView = (TabView) view; + tabView.getTab().select(); + } + + @Override + public void onNothingSelected(IcsAdapterView<?> parent) { + } + + public static class TabView extends LinearLayout { + private ScrollingTabContainerView mParent; + private ActionBar.Tab mTab; + private CapitalizingTextView mTextView; + private ImageView mIconView; + private View mCustomView; + + public TabView(Context context, AttributeSet attrs) { + //TODO super(context, null, R.attr.actionBarTabStyle); + super(context, attrs); + } + + public void init(ScrollingTabContainerView parent, ActionBar.Tab tab, boolean forList) { + mParent = parent; + mTab = tab; + + if (forList) { + setGravity(Gravity.LEFT | Gravity.CENTER_VERTICAL); + } + + update(); + } + + public void bindTab(ActionBar.Tab tab) { + mTab = tab; + update(); + } + + @Override + public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { + super.onMeasure(widthMeasureSpec, heightMeasureSpec); + + // Re-measure if we went beyond our maximum size. + if (mParent.mMaxTabWidth > 0 && getMeasuredWidth() > mParent.mMaxTabWidth) { + super.onMeasure(MeasureSpec.makeMeasureSpec(mParent.mMaxTabWidth, MeasureSpec.EXACTLY), + heightMeasureSpec); + } + } + + public void update() { + final ActionBar.Tab tab = mTab; + final View custom = tab.getCustomView(); + if (custom != null) { + final ViewParent customParent = custom.getParent(); + if (customParent != this) { + if (customParent != null) ((ViewGroup) customParent).removeView(custom); + addView(custom); + } + mCustomView = custom; + if (mTextView != null) mTextView.setVisibility(GONE); + if (mIconView != null) { + mIconView.setVisibility(GONE); + mIconView.setImageDrawable(null); + } + } else { + if (mCustomView != null) { + removeView(mCustomView); + mCustomView = null; + } + + final Drawable icon = tab.getIcon(); + final CharSequence text = tab.getText(); + + if (icon != null) { + if (mIconView == null) { + ImageView iconView = new ImageView(getContext()); + LayoutParams lp = new LayoutParams(LayoutParams.WRAP_CONTENT, + LayoutParams.WRAP_CONTENT); + lp.gravity = Gravity.CENTER_VERTICAL; + iconView.setLayoutParams(lp); + addView(iconView, 0); + mIconView = iconView; + } + mIconView.setImageDrawable(icon); + mIconView.setVisibility(VISIBLE); + } else if (mIconView != null) { + mIconView.setVisibility(GONE); + mIconView.setImageDrawable(null); + } + + if (text != null) { + if (mTextView == null) { + CapitalizingTextView textView = new CapitalizingTextView(getContext(), null, + R.attr.actionBarTabTextStyle); + textView.setEllipsize(TruncateAt.END); + LayoutParams lp = new LayoutParams(LayoutParams.WRAP_CONTENT, + LayoutParams.WRAP_CONTENT); + lp.gravity = Gravity.CENTER_VERTICAL; + textView.setLayoutParams(lp); + addView(textView); + mTextView = textView; + } + mTextView.setTextCompat(text); + mTextView.setVisibility(VISIBLE); + } else if (mTextView != null) { + mTextView.setVisibility(GONE); + mTextView.setText(null); + } + + if (mIconView != null) { + mIconView.setContentDescription(tab.getContentDescription()); + } + } + } + + public ActionBar.Tab getTab() { + return mTab; + } + } + + private class TabAdapter extends BaseAdapter { + @Override + public int getCount() { + return mTabLayout.getChildCount(); + } + + @Override + public Object getItem(int position) { + return ((TabView) mTabLayout.getChildAt(position)).getTab(); + } + + @Override + public long getItemId(int position) { + return position; + } + + @Override + public View getView(int position, View convertView, ViewGroup parent) { + if (convertView == null) { + convertView = createTabView((ActionBar.Tab) getItem(position), true); + } else { + ((TabView) convertView).bindTab((ActionBar.Tab) getItem(position)); + } + return convertView; + } + } + + private class TabClickListener implements OnClickListener { + public void onClick(View view) { + TabView tabView = (TabView) view; + tabView.getTab().select(); + final int tabCount = mTabLayout.getChildCount(); + for (int i = 0; i < tabCount; i++) { + final View child = mTabLayout.getChildAt(i); + child.setSelected(child == view); + } + } + } + + protected class VisibilityAnimListener implements Animator.AnimatorListener { + private boolean mCanceled = false; + private int mFinalVisibility; + + public VisibilityAnimListener withFinalVisibility(int visibility) { + mFinalVisibility = visibility; + return this; + } + + @Override + public void onAnimationStart(Animator animation) { + setVisibility(VISIBLE); + mVisibilityAnim = animation; + mCanceled = false; + } + + @Override + public void onAnimationEnd(Animator animation) { + if (mCanceled) return; + + mVisibilityAnim = null; + setVisibility(mFinalVisibility); + } + + @Override + public void onAnimationCancel(Animator animation) { + mCanceled = true; + } + + @Override + public void onAnimationRepeat(Animator animation) { + } + } +} |