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org.holoeverywhere.widget.AbsSpinner Maven / Gradle / Ivy
package org.holoeverywhere.widget;
import org.holoeverywhere.ArrayAdapter;
import org.holoeverywhere.R;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.database.DataSetObserver;
import android.graphics.Rect;
import android.os.Build.VERSION;
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.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;
import android.widget.SpinnerAdapter;
public abstract class AbsSpinner extends AdapterView {
class RecycleBin {
private final SparseArray mScrapHeap = new SparseArray();
void clear() {
final SparseArray 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();
}
View get(int position) {
View result = mScrapHeap.get(position);
if (result != null) {
mScrapHeap.delete(position);
}
return result;
}
public void put(int position, View v) {
mScrapHeap.put(position, v);
}
}
static class SavedState extends BaseSavedState {
public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
@Override
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
@Override
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
int position;
long selectedId;
private SavedState(Parcel in) {
super(in);
selectedId = in.readLong();
position = in.readInt();
}
SavedState(Parcelable superState) {
super(superState);
}
@Override
public String toString() {
return "AbsSpinner.SavedState{"
+ Integer.toHexString(System.identityHashCode(this))
+ " selectedId=" + selectedId + " position=" + position
+ "}";
}
@Override
public void writeToParcel(Parcel out, int flags) {
super.writeToParcel(out, flags);
out.writeLong(selectedId);
out.writeInt(position);
}
}
SpinnerAdapter mAdapter;
private DataSetObserver mDataSetObserver;
int mHeightMeasureSpec;
final RecycleBin mRecycler = new RecycleBin();
int mSelectionBottomPadding = 0;
int mSelectionLeftPadding = 0;
int mSelectionRightPadding = 0;
int mSelectionTopPadding = 0;
final Rect mSpinnerPadding = new Rect();
private Rect mTouchFrame;
int mWidthMeasureSpec;
public AbsSpinner(Context context) {
super(context);
initAbsSpinner();
}
public AbsSpinner(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public AbsSpinner(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initAbsSpinner();
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.AbsSpinner, defStyle, 0);
CharSequence[] entries = a
.getTextArray(R.styleable.AbsSpinner_android_entries);
if (entries != null) {
ArrayAdapter adapter = new ArrayAdapter(
context, R.layout.simple_spinner_item, entries);
adapter.setDropDownViewResource(R.layout.simple_spinner_dropdown_item);
setAdapter(adapter);
}
a.recycle();
}
@Override
protected ViewGroup.LayoutParams generateDefaultLayoutParams() {
return new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
}
@Override
public SpinnerAdapter getAdapter() {
return mAdapter;
}
int getChildHeight(View child) {
return child.getMeasuredHeight();
}
int getChildWidth(View child) {
return child.getMeasuredWidth();
}
@Override
public int getCount() {
return mItemCount;
}
@Override
public View getSelectedView() {
if (mItemCount > 0 && mSelectedPosition >= 0) {
return getChildAt(mSelectedPosition - mFirstPosition);
} else {
return null;
}
}
private void initAbsSpinner() {
setFocusable(true);
setWillNotDraw(false);
}
abstract void layout(int delta, boolean animate);
@Override
@SuppressLint("NewApi")
public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
super.onInitializeAccessibilityEvent(event);
event.setClassName(AbsSpinner.class.getName());
}
@Override
@SuppressLint("NewApi")
public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
super.onInitializeAccessibilityNodeInfo(info);
info.setClassName(AbsSpinner.class.getName());
}
@SuppressLint("NewApi")
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSize;
int heightSize;
mSpinnerPadding.left = getPaddingLeft() > mSelectionLeftPadding ? getPaddingLeft()
: mSelectionLeftPadding;
mSpinnerPadding.top = getPaddingTop() > mSelectionTopPadding ? getPaddingTop()
: mSelectionTopPadding;
mSpinnerPadding.right = getPaddingRight() > mSelectionRightPadding ? getPaddingRight()
: mSelectionRightPadding;
mSpinnerPadding.bottom = getPaddingBottom() > mSelectionBottomPadding ? getPaddingBottom()
: mSelectionBottomPadding;
if (mDataChanged) {
handleDataChanged();
}
int preferredHeight = 0;
int preferredWidth = 0;
boolean needsMeasuring = true;
int selectedPosition = getSelectedItemPosition();
if (selectedPosition >= 0 && mAdapter != null
&& selectedPosition < mAdapter.getCount()) {
View view = mRecycler.get(selectedPosition);
if (view == null) {
view = mAdapter.getView(selectedPosition, null, this);
if (VERSION.SDK_INT >= 16
&& view.getImportantForAccessibility() == View.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
view.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_YES);
}
}
if (view != null) {
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) {
preferredHeight = mSpinnerPadding.top + mSpinnerPadding.bottom;
if (widthMode == MeasureSpec.UNSPECIFIED) {
preferredWidth = mSpinnerPadding.left + mSpinnerPadding.right;
}
}
preferredHeight = Math
.max(preferredHeight, getSuggestedMinimumHeight());
preferredWidth = Math.max(preferredWidth, getSuggestedMinimumWidth());
heightSize = org.holoeverywhere.internal._View
.supportResolveSizeAndState(preferredHeight, heightMeasureSpec,
0);
widthSize = org.holoeverywhere.internal._View
.supportResolveSizeAndState(preferredWidth, widthMeasureSpec, 0);
setMeasuredDimension(widthSize, heightSize);
mHeightMeasureSpec = heightMeasureSpec;
mWidthMeasureSpec = widthMeasureSpec;
}
@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 = AdapterView.SYNC_SELECTED_POSITION;
requestLayout();
}
}
@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 = AdapterView.INVALID_POSITION;
}
return ss;
}
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 AdapterView.INVALID_POSITION;
}
void recycleAllViews() {
final int childCount = getChildCount();
final AbsSpinner.RecycleBin recycleBin = mRecycler;
final int position = mFirstPosition;
for (int i = 0; i < childCount; i++) {
View v = getChildAt(i);
int index = position + i;
recycleBin.put(index, v);
}
}
@Override
public void requestLayout() {
if (!mBlockLayoutRequests) {
super.requestLayout();
}
}
void resetList() {
mDataChanged = false;
mNeedSync = false;
removeAllViewsInLayout();
mOldSelectedPosition = AdapterView.INVALID_POSITION;
mOldSelectedRowId = AdapterView.INVALID_ROW_ID;
setSelectedPositionInt(AdapterView.INVALID_POSITION);
setNextSelectedPositionInt(AdapterView.INVALID_POSITION);
invalidate();
}
@Override
public void setAdapter(SpinnerAdapter adapter) {
if (null != mAdapter) {
mAdapter.unregisterDataSetObserver(mDataSetObserver);
resetList();
}
mAdapter = adapter;
mOldSelectedPosition = AdapterView.INVALID_POSITION;
mOldSelectedRowId = AdapterView.INVALID_ROW_ID;
if (mAdapter != null) {
mOldItemCount = mItemCount;
mItemCount = mAdapter.getCount();
checkFocus();
mDataSetObserver = new AdapterDataSetObserver();
mAdapter.registerDataSetObserver(mDataSetObserver);
int position = mItemCount > 0 ? 0 : AdapterView.INVALID_POSITION;
setSelectedPositionInt(position);
setNextSelectedPositionInt(position);
if (mItemCount == 0) {
checkSelectionChanged();
}
} else {
checkFocus();
resetList();
checkSelectionChanged();
}
requestLayout();
}
@Override
public void setSelection(int position) {
setNextSelectedPositionInt(position);
requestLayout();
invalidate();
}
public void setSelection(int position, boolean animate) {
boolean shouldAnimate = animate && mFirstPosition <= position
&& position <= mFirstPosition + getChildCount() - 1;
setSelectionInt(position, shouldAnimate);
}
void setSelectionInt(int position, boolean animate) {
if (position != mOldSelectedPosition) {
mBlockLayoutRequests = true;
int delta = position - mSelectedPosition;
setNextSelectedPositionInt(position);
layout(delta, animate);
mBlockLayoutRequests = false;
}
}
}
