--- /dev/null
+/*
+ * Copyright (C) 2006 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.database.DataSetObserver;
+import android.graphics.Rect;
+import android.os.Build;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.AttributeSet;
+import android.util.SparseArray;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.SpinnerAdapter;
+
+/**
+ * An abstract base class for spinner widgets. SDK users will probably not
+ * need to use this class.
+ *
+ * @attr ref android.R.styleable#AbsSpinner_entries
+ */
+public abstract class IcsAbsSpinner extends IcsAdapterView<SpinnerAdapter> {
+ private static final boolean IS_HONEYCOMB = Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
+
+ SpinnerAdapter mAdapter;
+
+ int mHeightMeasureSpec;
+ int mWidthMeasureSpec;
+ boolean mBlockLayoutRequests;
+
+ int mSelectionLeftPadding = 0;
+ int mSelectionTopPadding = 0;
+ int mSelectionRightPadding = 0;
+ int mSelectionBottomPadding = 0;
+ final Rect mSpinnerPadding = new Rect();
+
+ final RecycleBin mRecycler = new RecycleBin();
+ private DataSetObserver mDataSetObserver;
+
+ /** Temporary frame to hold a child View's frame rectangle */
+ private Rect mTouchFrame;
+
+ public IcsAbsSpinner(Context context) {
+ super(context);
+ initAbsSpinner();
+ }
+
+ public IcsAbsSpinner(Context context, AttributeSet attrs) {
+ this(context, attrs, 0);
+ }
+
+ public IcsAbsSpinner(Context context, AttributeSet attrs, int defStyle) {
+ super(context, attrs, defStyle);
+ initAbsSpinner();
+
+ /*
+ TypedArray a = context.obtainStyledAttributes(attrs,
+ com.android.internal.R.styleable.AbsSpinner, defStyle, 0);
+
+ CharSequence[] entries = a.getTextArray(R.styleable.AbsSpinner_entries);
+ if (entries != null) {
+ ArrayAdapter<CharSequence> adapter =
+ new ArrayAdapter<CharSequence>(context,
+ R.layout.simple_spinner_item, entries);
+ adapter.setDropDownViewResource(R.layout.simple_spinner_dropdown_item);
+ setAdapter(adapter);
+ }
+
+ a.recycle();
+ */
+ }
+
+ /**
+ * Common code for different constructor flavors
+ */
+ private void initAbsSpinner() {
+ setFocusable(true);
+ setWillNotDraw(false);
+ }
+
+ /**
+ * The Adapter is used to provide the data which backs this Spinner.
+ * It also provides methods to transform spinner items based on their position
+ * relative to the selected item.
+ * @param adapter The SpinnerAdapter to use for this Spinner
+ */
+ @Override
+ public void setAdapter(SpinnerAdapter adapter) {
+ if (null != mAdapter) {
+ mAdapter.unregisterDataSetObserver(mDataSetObserver);
+ resetList();
+ }
+
+ mAdapter = adapter;
+
+ mOldSelectedPosition = INVALID_POSITION;
+ mOldSelectedRowId = INVALID_ROW_ID;
+
+ if (mAdapter != null) {
+ mOldItemCount = mItemCount;
+ mItemCount = mAdapter.getCount();
+ checkFocus();
+
+ mDataSetObserver = new AdapterDataSetObserver();
+ mAdapter.registerDataSetObserver(mDataSetObserver);
+
+ int position = mItemCount > 0 ? 0 : INVALID_POSITION;
+
+ setSelectedPositionInt(position);
+ setNextSelectedPositionInt(position);
+
+ if (mItemCount == 0) {
+ // Nothing selected
+ checkSelectionChanged();
+ }
+
+ } else {
+ checkFocus();
+ resetList();
+ // Nothing selected
+ checkSelectionChanged();
+ }
+
+ requestLayout();
+ }
+
+ /**
+ * Clear out all children from the list
+ */
+ void resetList() {
+ mDataChanged = false;
+ mNeedSync = false;
+
+ removeAllViewsInLayout();
+ mOldSelectedPosition = INVALID_POSITION;
+ mOldSelectedRowId = INVALID_ROW_ID;
+
+ setSelectedPositionInt(INVALID_POSITION);
+ setNextSelectedPositionInt(INVALID_POSITION);
+ invalidate();
+ }
+
+ /**
+ * @see android.view.View#measure(int, int)
+ *
+ * Figure out the dimensions of this Spinner. The width comes from
+ * the widthMeasureSpec as Spinnners can't have their width set to
+ * UNSPECIFIED. The height is based on the height of the selected item
+ * plus padding.
+ */
+ @Override
+ protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+ int widthMode = MeasureSpec.getMode(widthMeasureSpec);
+ int widthSize;
+ int heightSize;
+
+ final int mPaddingLeft = getPaddingLeft();
+ final int mPaddingTop = getPaddingTop();
+ final int mPaddingRight = getPaddingRight();
+ final int mPaddingBottom = getPaddingBottom();
+
+ mSpinnerPadding.left = mPaddingLeft > mSelectionLeftPadding ? mPaddingLeft
+ : mSelectionLeftPadding;
+ mSpinnerPadding.top = mPaddingTop > mSelectionTopPadding ? mPaddingTop
+ : mSelectionTopPadding;
+ mSpinnerPadding.right = mPaddingRight > mSelectionRightPadding ? mPaddingRight
+ : mSelectionRightPadding;
+ mSpinnerPadding.bottom = mPaddingBottom > mSelectionBottomPadding ? mPaddingBottom
+ : mSelectionBottomPadding;
+
+ if (mDataChanged) {
+ handleDataChanged();
+ }
+
+ int preferredHeight = 0;
+ int preferredWidth = 0;
+ boolean needsMeasuring = true;
+
+ int selectedPosition = getSelectedItemPosition();
+ if (selectedPosition >= 0 && mAdapter != null && selectedPosition < mAdapter.getCount()) {
+ // Try looking in the recycler. (Maybe we were measured once already)
+ View view = mRecycler.get(selectedPosition);
+ if (view == null) {
+ // Make a new one
+ view = mAdapter.getView(selectedPosition, null, this);
+ }
+
+ if (view != null) {
+ // Put in recycler for re-measuring and/or layout
+ mRecycler.put(selectedPosition, view);
+ }
+
+ if (view != null) {
+ if (view.getLayoutParams() == null) {
+ mBlockLayoutRequests = true;
+ view.setLayoutParams(generateDefaultLayoutParams());
+ mBlockLayoutRequests = false;
+ }
+ measureChild(view, widthMeasureSpec, heightMeasureSpec);
+
+ preferredHeight = getChildHeight(view) + mSpinnerPadding.top + mSpinnerPadding.bottom;
+ preferredWidth = getChildWidth(view) + mSpinnerPadding.left + mSpinnerPadding.right;
+
+ needsMeasuring = false;
+ }
+ }
+
+ if (needsMeasuring) {
+ // No views -- just use padding
+ preferredHeight = mSpinnerPadding.top + mSpinnerPadding.bottom;
+ if (widthMode == MeasureSpec.UNSPECIFIED) {
+ preferredWidth = mSpinnerPadding.left + mSpinnerPadding.right;
+ }
+ }
+
+ preferredHeight = Math.max(preferredHeight, getSuggestedMinimumHeight());
+ preferredWidth = Math.max(preferredWidth, getSuggestedMinimumWidth());
+
+ if (IS_HONEYCOMB) {
+ heightSize = resolveSizeAndState(preferredHeight, heightMeasureSpec, 0);
+ widthSize = resolveSizeAndState(preferredWidth, widthMeasureSpec, 0);
+ } else {
+ heightSize = resolveSize(preferredHeight, heightMeasureSpec);
+ widthSize = resolveSize(preferredWidth, widthMeasureSpec);
+ }
+
+ setMeasuredDimension(widthSize, heightSize);
+ mHeightMeasureSpec = heightMeasureSpec;
+ mWidthMeasureSpec = widthMeasureSpec;
+ }
+
+ int getChildHeight(View child) {
+ return child.getMeasuredHeight();
+ }
+
+ int getChildWidth(View child) {
+ return child.getMeasuredWidth();
+ }
+
+ @Override
+ protected ViewGroup.LayoutParams generateDefaultLayoutParams() {
+ return new ViewGroup.LayoutParams(
+ ViewGroup.LayoutParams.MATCH_PARENT,
+ ViewGroup.LayoutParams.WRAP_CONTENT);
+ }
+
+ void recycleAllViews() {
+ final int childCount = getChildCount();
+ final IcsAbsSpinner.RecycleBin recycleBin = mRecycler;
+ final int position = mFirstPosition;
+
+ // All views go in recycler
+ for (int i = 0; i < childCount; i++) {
+ View v = getChildAt(i);
+ int index = position + i;
+ recycleBin.put(index, v);
+ }
+ }
+
+ /**
+ * Jump directly to a specific item in the adapter data.
+ */
+ public void setSelection(int position, boolean animate) {
+ // Animate only if requested position is already on screen somewhere
+ boolean shouldAnimate = animate && mFirstPosition <= position &&
+ position <= mFirstPosition + getChildCount() - 1;
+ setSelectionInt(position, shouldAnimate);
+ }
+
+ @Override
+ public void setSelection(int position) {
+ setNextSelectedPositionInt(position);
+ requestLayout();
+ invalidate();
+ }
+
+
+ /**
+ * Makes the item at the supplied position selected.
+ *
+ * @param position Position to select
+ * @param animate Should the transition be animated
+ *
+ */
+ void setSelectionInt(int position, boolean animate) {
+ if (position != mOldSelectedPosition) {
+ mBlockLayoutRequests = true;
+ int delta = position - mSelectedPosition;
+ setNextSelectedPositionInt(position);
+ layout(delta, animate);
+ mBlockLayoutRequests = false;
+ }
+ }
+
+ abstract void layout(int delta, boolean animate);
+
+ @Override
+ public View getSelectedView() {
+ if (mItemCount > 0 && mSelectedPosition >= 0) {
+ return getChildAt(mSelectedPosition - mFirstPosition);
+ } else {
+ return null;
+ }
+ }
+
+ /**
+ * Override to prevent spamming ourselves with layout requests
+ * as we place views
+ *
+ * @see android.view.View#requestLayout()
+ */
+ @Override
+ public void requestLayout() {
+ if (!mBlockLayoutRequests) {
+ super.requestLayout();
+ }
+ }
+
+ @Override
+ public SpinnerAdapter getAdapter() {
+ return mAdapter;
+ }
+
+ @Override
+ public int getCount() {
+ return mItemCount;
+ }
+
+ /**
+ * Maps a point to a position in the list.
+ *
+ * @param x X in local coordinate
+ * @param y Y in local coordinate
+ * @return The position of the item which contains the specified point, or
+ * {@link #INVALID_POSITION} if the point does not intersect an item.
+ */
+ public int pointToPosition(int x, int y) {
+ Rect frame = mTouchFrame;
+ if (frame == null) {
+ mTouchFrame = new Rect();
+ frame = mTouchFrame;
+ }
+
+ final int count = getChildCount();
+ for (int i = count - 1; i >= 0; i--) {
+ View child = getChildAt(i);
+ if (child.getVisibility() == View.VISIBLE) {
+ child.getHitRect(frame);
+ if (frame.contains(x, y)) {
+ return mFirstPosition + i;
+ }
+ }
+ }
+ return INVALID_POSITION;
+ }
+
+ static class SavedState extends BaseSavedState {
+ long selectedId;
+ int position;
+
+ /**
+ * Constructor called from {@link AbsSpinner#onSaveInstanceState()}
+ */
+ SavedState(Parcelable superState) {
+ super(superState);
+ }
+
+ /**
+ * Constructor called from {@link #CREATOR}
+ */
+ private SavedState(Parcel in) {
+ super(in);
+ selectedId = in.readLong();
+ position = in.readInt();
+ }
+
+ @Override
+ public void writeToParcel(Parcel out, int flags) {
+ super.writeToParcel(out, flags);
+ out.writeLong(selectedId);
+ out.writeInt(position);
+ }
+
+ @Override
+ public String toString() {
+ return "AbsSpinner.SavedState{"
+ + Integer.toHexString(System.identityHashCode(this))
+ + " selectedId=" + selectedId
+ + " position=" + position + "}";
+ }
+
+ public static final Parcelable.Creator<SavedState> CREATOR
+ = new Parcelable.Creator<SavedState>() {
+ public SavedState createFromParcel(Parcel in) {
+ return new SavedState(in);
+ }
+
+ public SavedState[] newArray(int size) {
+ return new SavedState[size];
+ }
+ };
+ }
+
+ @Override
+ public Parcelable onSaveInstanceState() {
+ Parcelable superState = super.onSaveInstanceState();
+ SavedState ss = new SavedState(superState);
+ ss.selectedId = getSelectedItemId();
+ if (ss.selectedId >= 0) {
+ ss.position = getSelectedItemPosition();
+ } else {
+ ss.position = INVALID_POSITION;
+ }
+ return ss;
+ }
+
+ @Override
+ public void onRestoreInstanceState(Parcelable state) {
+ SavedState ss = (SavedState) state;
+
+ super.onRestoreInstanceState(ss.getSuperState());
+
+ if (ss.selectedId >= 0) {
+ mDataChanged = true;
+ mNeedSync = true;
+ mSyncRowId = ss.selectedId;
+ mSyncPosition = ss.position;
+ mSyncMode = SYNC_SELECTED_POSITION;
+ requestLayout();
+ }
+ }
+
+ class RecycleBin {
+ private final SparseArray<View> mScrapHeap = new SparseArray<View>();
+
+ public void put(int position, View v) {
+ mScrapHeap.put(position, v);
+ }
+
+ View get(int position) {
+ // System.out.print("Looking for " + position);
+ View result = mScrapHeap.get(position);
+ if (result != null) {
+ // System.out.println(" HIT");
+ mScrapHeap.delete(position);
+ } else {
+ // System.out.println(" MISS");
+ }
+ return result;
+ }
+
+ void clear() {
+ final SparseArray<View> scrapHeap = mScrapHeap;
+ final int count = scrapHeap.size();
+ for (int i = 0; i < count; i++) {
+ final View view = scrapHeap.valueAt(i);
+ if (view != null) {
+ removeDetachedView(view, true);
+ }
+ }
+ scrapHeap.clear();
+ }
+ }
+}
projects / debian / openrocket / blobdiff