diff options
Diffstat (limited to 'actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsListPopupWindow.java')
| -rw-r--r-- | actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsListPopupWindow.java | 644 |
1 files changed, 644 insertions, 0 deletions
diff --git a/actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsListPopupWindow.java b/actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsListPopupWindow.java new file mode 100644 index 000000000..d13c6cea9 --- /dev/null +++ b/actionbarsherlock/src/com/actionbarsherlock/internal/widget/IcsListPopupWindow.java @@ -0,0 +1,644 @@ +package com.actionbarsherlock.internal.widget; + +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 PopupWindow 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 PopupWindow(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 PopupWindow(wrapped, attrs, defStyleAttr); + } else { + mPopup = new PopupWindow(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); + } + + 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(); + } + } + } +} |