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Apache License
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package com.actionbarsherlock.internal.widget; /*from w w w .j a va 2 s.c om*/ import com.actionbarsherlock.R; import android.content.Context; import android.content.res.Resources; import android.database.DataSetObserver; import android.graphics.Rect; import android.graphics.drawable.Drawable; import android.os.Build; import android.os.Handler; import android.util.AttributeSet; import android.view.ContextThemeWrapper; import android.view.MotionEvent; import android.view.View; import android.view.View.MeasureSpec; import android.view.View.OnTouchListener; import android.view.ViewGroup; import android.view.ViewParent; import android.widget.AbsListView; import android.widget.AdapterView; import android.widget.LinearLayout; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.PopupWindow; /** * A proxy between pre- and post-Honeycomb implementations of this class. */ public class IcsListPopupWindow { /** * This value controls the length of time that the user * must leave a pointer down without scrolling to expand * the autocomplete dropdown list to cover the IME. */ private static final int EXPAND_LIST_TIMEOUT = 250; private Context mContext; private final PopupWindowCompat mPopup; private ListAdapter mAdapter; private DropDownListView mDropDownList; private int mDropDownHeight = ViewGroup.LayoutParams.WRAP_CONTENT; private int mDropDownWidth = ViewGroup.LayoutParams.WRAP_CONTENT; private int mDropDownHorizontalOffset; private int mDropDownVerticalOffset; private boolean mDropDownVerticalOffsetSet; private int mListItemExpandMaximum = Integer.MAX_VALUE; private View mPromptView; private int mPromptPosition = POSITION_PROMPT_ABOVE; private DataSetObserver mObserver; private View mDropDownAnchorView; private Drawable mDropDownListHighlight; private AdapterView.OnItemClickListener mItemClickListener; private AdapterView.OnItemSelectedListener mItemSelectedListener; private final ResizePopupRunnable mResizePopupRunnable = new ResizePopupRunnable(); private final PopupTouchInterceptor mTouchInterceptor = new PopupTouchInterceptor(); private final PopupScrollListener mScrollListener = new PopupScrollListener(); private final ListSelectorHider mHideSelector = new ListSelectorHider(); private Handler mHandler = new Handler(); private Rect mTempRect = new Rect(); private boolean mModal; public static final int POSITION_PROMPT_ABOVE = 0; public static final int POSITION_PROMPT_BELOW = 1; public IcsListPopupWindow(Context context) { this(context, null, R.attr.listPopupWindowStyle); } public IcsListPopupWindow(Context context, AttributeSet attrs, int defStyleAttr) { mContext = context; mPopup = new PopupWindowCompat(context, attrs, defStyleAttr); mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); } public IcsListPopupWindow(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { mContext = context; if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB) { Context wrapped = new ContextThemeWrapper(context, defStyleRes); mPopup = new PopupWindowCompat(wrapped, attrs, defStyleAttr); } else { mPopup = new PopupWindowCompat(context, attrs, defStyleAttr, defStyleRes); } mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NEEDED); } public void setAdapter(ListAdapter adapter) { if (mObserver == null) { mObserver = new PopupDataSetObserver(); } else if (mAdapter != null) { mAdapter.unregisterDataSetObserver(mObserver); } mAdapter = adapter; if (mAdapter != null) { adapter.registerDataSetObserver(mObserver); } if (mDropDownList != null) { mDropDownList.setAdapter(mAdapter); } } public void setPromptPosition(int position) { mPromptPosition = position; } public void setModal(boolean modal) { mModal = true; mPopup.setFocusable(modal); } public void setBackgroundDrawable(Drawable d) { mPopup.setBackgroundDrawable(d); } public void setAnchorView(View anchor) { mDropDownAnchorView = anchor; } public void setHorizontalOffset(int offset) { mDropDownHorizontalOffset = offset; } public void setVerticalOffset(int offset) { mDropDownVerticalOffset = offset; mDropDownVerticalOffsetSet = true; } public void setContentWidth(int width) { Drawable popupBackground = mPopup.getBackground(); if (popupBackground != null) { popupBackground.getPadding(mTempRect); mDropDownWidth = mTempRect.left + mTempRect.right + width; } else { mDropDownWidth = width; } } public void setOnItemClickListener(AdapterView.OnItemClickListener clickListener) { mItemClickListener = clickListener; } public void show() { int height = buildDropDown(); int widthSpec = 0; int heightSpec = 0; boolean noInputMethod = isInputMethodNotNeeded(); //XXX mPopup.setAllowScrollingAnchorParent(!noInputMethod); if (mPopup.isShowing()) { if (mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT) { // The call to PopupWindow's update method below can accept -1 for any // value you do not want to update. widthSpec = -1; } else if (mDropDownWidth == ViewGroup.LayoutParams.WRAP_CONTENT) { widthSpec = mDropDownAnchorView.getWidth(); } else { widthSpec = mDropDownWidth; } if (mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT) { // The call to PopupWindow's update method below can accept -1 for any // value you do not want to update. heightSpec = noInputMethod ? height : ViewGroup.LayoutParams.MATCH_PARENT; if (noInputMethod) { mPopup.setWindowLayoutMode( mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT ? ViewGroup.LayoutParams.MATCH_PARENT : 0, 0); } else { mPopup.setWindowLayoutMode( mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT ? ViewGroup.LayoutParams.MATCH_PARENT : 0, ViewGroup.LayoutParams.MATCH_PARENT); } } else if (mDropDownHeight == ViewGroup.LayoutParams.WRAP_CONTENT) { heightSpec = height; } else { heightSpec = mDropDownHeight; } mPopup.setOutsideTouchable(true); mPopup.update(mDropDownAnchorView, mDropDownHorizontalOffset, mDropDownVerticalOffset, widthSpec, heightSpec); } else { if (mDropDownWidth == ViewGroup.LayoutParams.MATCH_PARENT) { widthSpec = ViewGroup.LayoutParams.MATCH_PARENT; } else { if (mDropDownWidth == ViewGroup.LayoutParams.WRAP_CONTENT) { mPopup.setWidth(mDropDownAnchorView.getWidth()); } else { mPopup.setWidth(mDropDownWidth); } } if (mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT) { heightSpec = ViewGroup.LayoutParams.MATCH_PARENT; } else { if (mDropDownHeight == ViewGroup.LayoutParams.WRAP_CONTENT) { mPopup.setHeight(height); } else { mPopup.setHeight(mDropDownHeight); } } mPopup.setWindowLayoutMode(widthSpec, heightSpec); //XXX mPopup.setClipToScreenEnabled(true); // use outside touchable to dismiss drop down when touching outside of it, so // only set this if the dropdown is not always visible mPopup.setOutsideTouchable(true); mPopup.setTouchInterceptor(mTouchInterceptor); mPopup.showAsDropDown(mDropDownAnchorView, mDropDownHorizontalOffset, mDropDownVerticalOffset); mDropDownList.setSelection(ListView.INVALID_POSITION); if (!mModal || mDropDownList.isInTouchMode()) { clearListSelection(); } if (!mModal) { mHandler.post(mHideSelector); } } } public void dismiss() { mPopup.dismiss(); if (mPromptView != null) { final ViewParent parent = mPromptView.getParent(); if (parent instanceof ViewGroup) { final ViewGroup group = (ViewGroup) parent; group.removeView(mPromptView); } } mPopup.setContentView(null); mDropDownList = null; mHandler.removeCallbacks(mResizePopupRunnable); } public void setOnDismissListener(PopupWindow.OnDismissListener listener) { mPopup.setOnDismissListener(listener); } public void setInputMethodMode(int mode) { mPopup.setInputMethodMode(mode); } /** * Set the selected position of the list. * Only valid when {@link #isShowing()} == {@code true}. * * @param position List position to set as selected. */ public void setSelection(int position) { DropDownListView list = mDropDownList; if (isShowing() && list != null) { list.mListSelectionHidden = false; list.setSelection(position); if (list.getChoiceMode() != ListView.CHOICE_MODE_NONE) { list.setItemChecked(position, true); } } } public void clearListSelection() { final DropDownListView list = mDropDownList; if (list != null) { // WARNING: Please read the comment where mListSelectionHidden is declared list.mListSelectionHidden = true; //XXX list.hideSelector(); list.requestLayout(); } } public boolean isShowing() { return mPopup.isShowing(); } private boolean isInputMethodNotNeeded() { return mPopup.getInputMethodMode() == PopupWindow.INPUT_METHOD_NOT_NEEDED; } public ListView getListView() { return mDropDownList; } private int buildDropDown() { ViewGroup dropDownView; int otherHeights = 0; if (mDropDownList == null) { Context context = mContext; mDropDownList = new DropDownListView(context, !mModal); if (mDropDownListHighlight != null) { mDropDownList.setSelector(mDropDownListHighlight); } mDropDownList.setAdapter(mAdapter); mDropDownList.setOnItemClickListener(mItemClickListener); mDropDownList.setFocusable(true); mDropDownList.setFocusableInTouchMode(true); mDropDownList.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { if (position != -1) { DropDownListView dropDownList = mDropDownList; if (dropDownList != null) { dropDownList.mListSelectionHidden = false; } } } public void onNothingSelected(AdapterView<?> parent) { } }); mDropDownList.setOnScrollListener(mScrollListener); if (mItemSelectedListener != null) { mDropDownList.setOnItemSelectedListener(mItemSelectedListener); } dropDownView = mDropDownList; View hintView = mPromptView; if (hintView != null) { // if an hint has been specified, we accomodate more space for it and // add a text view in the drop down menu, at the bottom of the list LinearLayout hintContainer = new LinearLayout(context); hintContainer.setOrientation(LinearLayout.VERTICAL); LinearLayout.LayoutParams hintParams = new LinearLayout.LayoutParams( ViewGroup.LayoutParams.MATCH_PARENT, 0, 1.0f ); switch (mPromptPosition) { case POSITION_PROMPT_BELOW: hintContainer.addView(dropDownView, hintParams); hintContainer.addView(hintView); break; case POSITION_PROMPT_ABOVE: hintContainer.addView(hintView); hintContainer.addView(dropDownView, hintParams); break; default: break; } // measure the hint's height to find how much more vertical space // we need to add to the drop down's height int widthSpec = MeasureSpec.makeMeasureSpec(mDropDownWidth, MeasureSpec.AT_MOST); int heightSpec = MeasureSpec.UNSPECIFIED; hintView.measure(widthSpec, heightSpec); hintParams = (LinearLayout.LayoutParams) hintView.getLayoutParams(); otherHeights = hintView.getMeasuredHeight() + hintParams.topMargin + hintParams.bottomMargin; dropDownView = hintContainer; } mPopup.setContentView(dropDownView); } else { dropDownView = (ViewGroup) mPopup.getContentView(); final View view = mPromptView; if (view != null) { LinearLayout.LayoutParams hintParams = (LinearLayout.LayoutParams) view.getLayoutParams(); otherHeights = view.getMeasuredHeight() + hintParams.topMargin + hintParams.bottomMargin; } } // getMaxAvailableHeight() subtracts the padding, so we put it back // to get the available height for the whole window int padding = 0; Drawable background = mPopup.getBackground(); if (background != null) { background.getPadding(mTempRect); padding = mTempRect.top + mTempRect.bottom; // If we don't have an explicit vertical offset, determine one from the window // background so that content will line up. if (!mDropDownVerticalOffsetSet) { mDropDownVerticalOffset = -mTempRect.top; } } // Max height available on the screen for a popup. boolean ignoreBottomDecorations = mPopup.getInputMethodMode() == PopupWindow.INPUT_METHOD_NOT_NEEDED; final int maxHeight = /*mPopup.*/getMaxAvailableHeight( mDropDownAnchorView, mDropDownVerticalOffset, ignoreBottomDecorations); if (mDropDownHeight == ViewGroup.LayoutParams.MATCH_PARENT) { return maxHeight + padding; } final int listContent = /*mDropDownList.*/measureHeightOfChildren(MeasureSpec.UNSPECIFIED, 0, -1/*ListView.NO_POSITION*/, maxHeight - otherHeights, -1); // add padding only if the list has items in it, that way we don't show // the popup if it is not needed if (listContent > 0) otherHeights += padding; return listContent + otherHeights; } private int getMaxAvailableHeight(View anchor, int yOffset, boolean ignoreBottomDecorations) { final Rect displayFrame = new Rect(); anchor.getWindowVisibleDisplayFrame(displayFrame); final int[] anchorPos = new int[2]; anchor.getLocationOnScreen(anchorPos); int bottomEdge = displayFrame.bottom; if (ignoreBottomDecorations) { Resources res = anchor.getContext().getResources(); bottomEdge = res.getDisplayMetrics().heightPixels; } final int distanceToBottom = bottomEdge - (anchorPos[1] + anchor.getHeight()) - yOffset; final int distanceToTop = anchorPos[1] - displayFrame.top + yOffset; // anchorPos[1] is distance from anchor to top of screen int returnedHeight = Math.max(distanceToBottom, distanceToTop); if (mPopup.getBackground() != null) { mPopup.getBackground().getPadding(mTempRect); returnedHeight -= mTempRect.top + mTempRect.bottom; } return returnedHeight; } private int measureHeightOfChildren(int widthMeasureSpec, int startPosition, int endPosition, final int maxHeight, int disallowPartialChildPosition) { final ListAdapter adapter = mAdapter; if (adapter == null) { return mDropDownList.getListPaddingTop() + mDropDownList.getListPaddingBottom(); } // Include the padding of the list int returnedHeight = mDropDownList.getListPaddingTop() + mDropDownList.getListPaddingBottom(); final int dividerHeight = ((mDropDownList.getDividerHeight() > 0) && mDropDownList.getDivider() != null) ? mDropDownList.getDividerHeight() : 0; // The previous height value that was less than maxHeight and contained // no partial children int prevHeightWithoutPartialChild = 0; int i; View child; // mItemCount - 1 since endPosition parameter is inclusive endPosition = (endPosition == -1/*NO_POSITION*/) ? adapter.getCount() - 1 : endPosition; for (i = startPosition; i <= endPosition; ++i) { child = mAdapter.getView(i, null, mDropDownList); if (mDropDownList.getCacheColorHint() != 0) { child.setDrawingCacheBackgroundColor(mDropDownList.getCacheColorHint()); } measureScrapChild(child, i, widthMeasureSpec); if (i > 0) { // Count the divider for all but one child returnedHeight += dividerHeight; } returnedHeight += child.getMeasuredHeight(); if (returnedHeight >= maxHeight) { // We went over, figure out which height to return. If returnedHeight > maxHeight, // then the i'th position did not fit completely. return (disallowPartialChildPosition >= 0) // Disallowing is enabled (> -1) && (i > disallowPartialChildPosition) // We've past the min pos && (prevHeightWithoutPartialChild > 0) // We have a prev height && (returnedHeight != maxHeight) // i'th child did not fit completely ? prevHeightWithoutPartialChild : maxHeight; } if ((disallowPartialChildPosition >= 0) && (i >= disallowPartialChildPosition)) { prevHeightWithoutPartialChild = returnedHeight; } } // At this point, we went through the range of children, and they each // completely fit, so return the returnedHeight return returnedHeight; } private void measureScrapChild(View child, int position, int widthMeasureSpec) { ListView.LayoutParams p = (ListView.LayoutParams) child.getLayoutParams(); if (p == null) { p = new ListView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT, 0); child.setLayoutParams(p); } //XXX p.viewType = mAdapter.getItemViewType(position); //XXX p.forceAdd = true; int childWidthSpec = ViewGroup.getChildMeasureSpec(widthMeasureSpec, mDropDownList.getPaddingLeft() + mDropDownList.getPaddingRight(), p.width); int lpHeight = p.height; int childHeightSpec; if (lpHeight > 0) { childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight, MeasureSpec.EXACTLY); } else { childHeightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED); } child.measure(childWidthSpec, childHeightSpec); } private static class DropDownListView extends ListView { /* * WARNING: This is a workaround for a touch mode issue. * * Touch mode is propagated lazily to windows. This causes problems in * the following scenario: * - Type something in the AutoCompleteTextView and get some results * - Move down with the d-pad to select an item in the list * - Move up with the d-pad until the selection disappears * - Type more text in the AutoCompleteTextView *using the soft keyboard* * and get new results; you are now in touch mode * - The selection comes back on the first item in the list, even though * the list is supposed to be in touch mode * * Using the soft keyboard triggers the touch mode change but that change * is propagated to our window only after the first list layout, therefore * after the list attempts to resurrect the selection. * * The trick to work around this issue is to pretend the list is in touch * mode when we know that the selection should not appear, that is when * we know the user moved the selection away from the list. * * This boolean is set to true whenever we explicitly hide the list's * selection and reset to false whenever we know the user moved the * selection back to the list. * * When this boolean is true, isInTouchMode() returns true, otherwise it * returns super.isInTouchMode(). */ private boolean mListSelectionHidden; private boolean mHijackFocus; public DropDownListView(Context context, boolean hijackFocus) { super(context, null, /*com.android.internal.*/R.attr.dropDownListViewStyle); mHijackFocus = hijackFocus; // TODO: Add an API to control this setCacheColorHint(0); // Transparent, since the background drawable could be anything. } //XXX @Override //View obtainView(int position, boolean[] isScrap) { // View view = super.obtainView(position, isScrap); // if (view instanceof TextView) { // ((TextView) view).setHorizontallyScrolling(true); // } // return view; //} @Override public boolean isInTouchMode() { // WARNING: Please read the comment where mListSelectionHidden is declared return (mHijackFocus && mListSelectionHidden) || super.isInTouchMode(); } @Override public boolean hasWindowFocus() { return mHijackFocus || super.hasWindowFocus(); } @Override public boolean isFocused() { return mHijackFocus || super.isFocused(); } @Override public boolean hasFocus() { return mHijackFocus || super.hasFocus(); } } private class PopupDataSetObserver extends DataSetObserver { @Override public void onChanged() { if (isShowing()) { // Resize the popup to fit new content show(); } } @Override public void onInvalidated() { dismiss(); } } private class ListSelectorHider implements Runnable { public void run() { clearListSelection(); } } private class ResizePopupRunnable implements Runnable { public void run() { if (mDropDownList != null && mDropDownList.getCount() > mDropDownList.getChildCount() && mDropDownList.getChildCount() <= mListItemExpandMaximum) { mPopup.setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED); show(); } } } private class PopupTouchInterceptor implements OnTouchListener { public boolean onTouch(View v, MotionEvent event) { final int action = event.getAction(); final int x = (int) event.getX(); final int y = (int) event.getY(); if (action == MotionEvent.ACTION_DOWN && mPopup != null && mPopup.isShowing() && (x >= 0 && x < mPopup.getWidth() && y >= 0 && y < mPopup.getHeight())) { mHandler.postDelayed(mResizePopupRunnable, EXPAND_LIST_TIMEOUT); } else if (action == MotionEvent.ACTION_UP) { mHandler.removeCallbacks(mResizePopupRunnable); } return false; } } private class PopupScrollListener implements ListView.OnScrollListener { public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { } public void onScrollStateChanged(AbsListView view, int scrollState) { if (scrollState == SCROLL_STATE_TOUCH_SCROLL && !isInputMethodNotNeeded() && mPopup.getContentView() != null) { mHandler.removeCallbacks(mResizePopupRunnable); mResizePopupRunnable.run(); } } } }