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704 lines
22 KiB
Java
704 lines
22 KiB
Java
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.actionbarsherlock.internal.widget;
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import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
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import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
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import com.actionbarsherlock.R;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.content.DialogInterface.OnClickListener;
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import android.content.res.TypedArray;
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import android.database.DataSetObserver;
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import android.graphics.Rect;
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import android.graphics.drawable.Drawable;
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import android.util.AttributeSet;
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import android.view.Gravity;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.AdapterView;
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import android.widget.AdapterView.OnItemClickListener;
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import android.widget.ListAdapter;
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import android.widget.ListView;
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import android.widget.PopupWindow;
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import android.widget.SpinnerAdapter;
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/**
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* A view that displays one child at a time and lets the user pick among them.
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* The items in the Spinner come from the {@link Adapter} associated with
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* this view.
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*
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* <p>See the <a href="{@docRoot}resources/tutorials/views/hello-spinner.html">Spinner
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* tutorial</a>.</p>
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*
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* @attr ref android.R.styleable#Spinner_prompt
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*/
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public class IcsSpinner extends IcsAbsSpinner implements OnClickListener {
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//private static final String TAG = "Spinner";
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// Only measure this many items to get a decent max width.
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private static final int MAX_ITEMS_MEASURED = 15;
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/**
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* Use a dialog window for selecting spinner options.
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*/
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//public static final int MODE_DIALOG = 0;
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/**
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* Use a dropdown anchored to the Spinner for selecting spinner options.
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*/
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public static final int MODE_DROPDOWN = 1;
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/**
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* Use the theme-supplied value to select the dropdown mode.
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*/
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//private static final int MODE_THEME = -1;
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private SpinnerPopup mPopup;
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private DropDownAdapter mTempAdapter;
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int mDropDownWidth;
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private int mGravity;
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private boolean mDisableChildrenWhenDisabled;
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private Rect mTempRect = new Rect();
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public IcsSpinner(Context context, AttributeSet attrs) {
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this(context, attrs, R.attr.actionDropDownStyle);
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}
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/**
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* Construct a new spinner with the given context's theme, the supplied attribute set,
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* and default style.
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*
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* @param context The Context the view is running in, through which it can
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* access the current theme, resources, etc.
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* @param attrs The attributes of the XML tag that is inflating the view.
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* @param defStyle The default style to apply to this view. If 0, no style
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* will be applied (beyond what is included in the theme). This may
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* either be an attribute resource, whose value will be retrieved
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* from the current theme, or an explicit style resource.
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*/
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public IcsSpinner(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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TypedArray a = context.obtainStyledAttributes(attrs,
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R.styleable.SherlockSpinner, defStyle, 0);
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DropdownPopup popup = new DropdownPopup(context, attrs, defStyle);
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mDropDownWidth = a.getLayoutDimension(
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R.styleable.SherlockSpinner_android_dropDownWidth,
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ViewGroup.LayoutParams.WRAP_CONTENT);
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popup.setBackgroundDrawable(a.getDrawable(
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R.styleable.SherlockSpinner_android_popupBackground));
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final int verticalOffset = a.getDimensionPixelOffset(
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R.styleable.SherlockSpinner_android_dropDownVerticalOffset, 0);
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if (verticalOffset != 0) {
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popup.setVerticalOffset(verticalOffset);
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}
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final int horizontalOffset = a.getDimensionPixelOffset(
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R.styleable.SherlockSpinner_android_dropDownHorizontalOffset, 0);
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if (horizontalOffset != 0) {
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popup.setHorizontalOffset(horizontalOffset);
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}
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mPopup = popup;
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mGravity = a.getInt(R.styleable.SherlockSpinner_android_gravity, Gravity.CENTER);
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mPopup.setPromptText(a.getString(R.styleable.SherlockSpinner_android_prompt));
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mDisableChildrenWhenDisabled = true;
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a.recycle();
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// Base constructor can call setAdapter before we initialize mPopup.
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// Finish setting things up if this happened.
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if (mTempAdapter != null) {
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mPopup.setAdapter(mTempAdapter);
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mTempAdapter = null;
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}
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}
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@Override
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public void setEnabled(boolean enabled) {
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super.setEnabled(enabled);
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if (mDisableChildrenWhenDisabled) {
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final int count = getChildCount();
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for (int i = 0; i < count; i++) {
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getChildAt(i).setEnabled(enabled);
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}
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}
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}
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/**
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* Describes how the selected item view is positioned. Currently only the horizontal component
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* is used. The default is determined by the current theme.
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*
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* @param gravity See {@link android.view.Gravity}
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*
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* @attr ref android.R.styleable#Spinner_gravity
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*/
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public void setGravity(int gravity) {
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if (mGravity != gravity) {
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if ((gravity & Gravity.HORIZONTAL_GRAVITY_MASK) == 0) {
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gravity |= Gravity.LEFT;
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}
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mGravity = gravity;
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requestLayout();
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}
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}
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@Override
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public void setAdapter(SpinnerAdapter adapter) {
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super.setAdapter(adapter);
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if (mPopup != null) {
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mPopup.setAdapter(new DropDownAdapter(adapter));
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} else {
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mTempAdapter = new DropDownAdapter(adapter);
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}
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}
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@Override
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public int getBaseline() {
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View child = null;
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if (getChildCount() > 0) {
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child = getChildAt(0);
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} else if (mAdapter != null && mAdapter.getCount() > 0) {
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child = makeAndAddView(0);
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mRecycler.put(0, child);
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removeAllViewsInLayout();
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}
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if (child != null) {
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final int childBaseline = child.getBaseline();
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return childBaseline >= 0 ? child.getTop() + childBaseline : -1;
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} else {
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return -1;
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}
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}
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@Override
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protected void onDetachedFromWindow() {
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super.onDetachedFromWindow();
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if (mPopup != null && mPopup.isShowing()) {
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mPopup.dismiss();
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}
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}
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/**
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* <p>A spinner does not support item click events. Calling this method
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* will raise an exception.</p>
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*
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* @param l this listener will be ignored
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*/
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@Override
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public void setOnItemClickListener(OnItemClickListener l) {
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throw new RuntimeException("setOnItemClickListener cannot be used with a spinner.");
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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if (mPopup != null && MeasureSpec.getMode(widthMeasureSpec) == MeasureSpec.AT_MOST) {
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final int measuredWidth = getMeasuredWidth();
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setMeasuredDimension(Math.min(Math.max(measuredWidth,
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measureContentWidth(getAdapter(), getBackground())),
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MeasureSpec.getSize(widthMeasureSpec)),
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getMeasuredHeight());
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}
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}
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/**
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* @see android.view.View#onLayout(boolean,int,int,int,int)
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*
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* Creates and positions all views
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*
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*/
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@Override
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protected void onLayout(boolean changed, int l, int t, int r, int b) {
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super.onLayout(changed, l, t, r, b);
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mInLayout = true;
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layout(0, false);
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mInLayout = false;
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}
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/**
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* Creates and positions all views for this Spinner.
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*
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* @param delta Change in the selected position. +1 moves selection is moving to the right,
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* so views are scrolling to the left. -1 means selection is moving to the left.
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*/
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@Override
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void layout(int delta, boolean animate) {
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int childrenLeft = mSpinnerPadding.left;
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int childrenWidth = getRight() - getLeft() - mSpinnerPadding.left - mSpinnerPadding.right;
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if (mDataChanged) {
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handleDataChanged();
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}
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// Handle the empty set by removing all views
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if (mItemCount == 0) {
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resetList();
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return;
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}
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if (mNextSelectedPosition >= 0) {
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setSelectedPositionInt(mNextSelectedPosition);
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}
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recycleAllViews();
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// Clear out old views
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removeAllViewsInLayout();
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// Make selected view and position it
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mFirstPosition = mSelectedPosition;
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View sel = makeAndAddView(mSelectedPosition);
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int width = sel.getMeasuredWidth();
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int selectedOffset = childrenLeft;
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switch (mGravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
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case Gravity.CENTER_HORIZONTAL:
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selectedOffset = childrenLeft + (childrenWidth / 2) - (width / 2);
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break;
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case Gravity.RIGHT:
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selectedOffset = childrenLeft + childrenWidth - width;
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break;
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}
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sel.offsetLeftAndRight(selectedOffset);
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// Flush any cached views that did not get reused above
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mRecycler.clear();
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invalidate();
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checkSelectionChanged();
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mDataChanged = false;
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mNeedSync = false;
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setNextSelectedPositionInt(mSelectedPosition);
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}
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/**
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* Obtain a view, either by pulling an existing view from the recycler or
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* by getting a new one from the adapter. If we are animating, make sure
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* there is enough information in the view's layout parameters to animate
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* from the old to new positions.
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*
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* @param position Position in the spinner for the view to obtain
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* @return A view that has been added to the spinner
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*/
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private View makeAndAddView(int position) {
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View child;
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if (!mDataChanged) {
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child = mRecycler.get(position);
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if (child != null) {
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// Position the view
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setUpChild(child);
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return child;
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}
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}
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// Nothing found in the recycler -- ask the adapter for a view
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child = mAdapter.getView(position, null, this);
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// Position the view
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setUpChild(child);
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return child;
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}
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/**
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* Helper for makeAndAddView to set the position of a view
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* and fill out its layout paramters.
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*
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* @param child The view to position
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*/
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private void setUpChild(View child) {
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// Respect layout params that are already in the view. Otherwise
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// make some up...
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ViewGroup.LayoutParams lp = child.getLayoutParams();
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if (lp == null) {
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lp = generateDefaultLayoutParams();
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}
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addViewInLayout(child, 0, lp);
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child.setSelected(hasFocus());
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if (mDisableChildrenWhenDisabled) {
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child.setEnabled(isEnabled());
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}
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// Get measure specs
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int childHeightSpec = ViewGroup.getChildMeasureSpec(mHeightMeasureSpec,
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mSpinnerPadding.top + mSpinnerPadding.bottom, lp.height);
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int childWidthSpec = ViewGroup.getChildMeasureSpec(mWidthMeasureSpec,
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mSpinnerPadding.left + mSpinnerPadding.right, lp.width);
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// Measure child
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child.measure(childWidthSpec, childHeightSpec);
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int childLeft;
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int childRight;
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// Position vertically based on gravity setting
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int childTop = mSpinnerPadding.top
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+ ((getMeasuredHeight() - mSpinnerPadding.bottom -
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mSpinnerPadding.top - child.getMeasuredHeight()) / 2);
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int childBottom = childTop + child.getMeasuredHeight();
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int width = child.getMeasuredWidth();
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childLeft = 0;
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childRight = childLeft + width;
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child.layout(childLeft, childTop, childRight, childBottom);
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}
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@Override
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public boolean performClick() {
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boolean handled = super.performClick();
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if (!handled) {
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handled = true;
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if (!mPopup.isShowing()) {
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mPopup.show();
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}
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}
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return handled;
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}
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public void onClick(DialogInterface dialog, int which) {
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setSelection(which);
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dialog.dismiss();
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}
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/**
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* Sets the prompt to display when the dialog is shown.
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* @param prompt the prompt to set
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*/
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public void setPrompt(CharSequence prompt) {
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mPopup.setPromptText(prompt);
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}
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/**
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* Sets the prompt to display when the dialog is shown.
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* @param promptId the resource ID of the prompt to display when the dialog is shown
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*/
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public void setPromptId(int promptId) {
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setPrompt(getContext().getText(promptId));
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}
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/**
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* @return The prompt to display when the dialog is shown
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*/
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public CharSequence getPrompt() {
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return mPopup.getHintText();
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}
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int measureContentWidth(SpinnerAdapter adapter, Drawable background) {
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if (adapter == null) {
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return 0;
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}
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int width = 0;
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View itemView = null;
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int itemType = 0;
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final int widthMeasureSpec =
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MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
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final int heightMeasureSpec =
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MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
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// Make sure the number of items we'll measure is capped. If it's a huge data set
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// with wildly varying sizes, oh well.
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int start = Math.max(0, getSelectedItemPosition());
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final int end = Math.min(adapter.getCount(), start + MAX_ITEMS_MEASURED);
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final int count = end - start;
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start = Math.max(0, start - (MAX_ITEMS_MEASURED - count));
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for (int i = start; i < end; i++) {
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final int positionType = adapter.getItemViewType(i);
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if (positionType != itemType) {
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itemType = positionType;
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itemView = null;
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}
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itemView = adapter.getView(i, itemView, this);
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if (itemView.getLayoutParams() == null) {
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itemView.setLayoutParams(new ViewGroup.LayoutParams(
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ViewGroup.LayoutParams.WRAP_CONTENT,
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ViewGroup.LayoutParams.WRAP_CONTENT));
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}
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itemView.measure(widthMeasureSpec, heightMeasureSpec);
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width = Math.max(width, itemView.getMeasuredWidth());
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}
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// Add background padding to measured width
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if (background != null) {
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background.getPadding(mTempRect);
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width += mTempRect.left + mTempRect.right;
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}
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return width;
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}
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/**
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* <p>Wrapper class for an Adapter. Transforms the embedded Adapter instance
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* into a ListAdapter.</p>
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*/
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private static class DropDownAdapter implements ListAdapter, SpinnerAdapter {
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private SpinnerAdapter mAdapter;
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private ListAdapter mListAdapter;
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/**
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* <p>Creates a new ListAdapter wrapper for the specified adapter.</p>
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*
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* @param adapter the Adapter to transform into a ListAdapter
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*/
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public DropDownAdapter(SpinnerAdapter adapter) {
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this.mAdapter = adapter;
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if (adapter instanceof ListAdapter) {
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this.mListAdapter = (ListAdapter) adapter;
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}
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}
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public int getCount() {
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return mAdapter == null ? 0 : mAdapter.getCount();
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}
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public Object getItem(int position) {
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return mAdapter == null ? null : mAdapter.getItem(position);
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}
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public long getItemId(int position) {
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return mAdapter == null ? -1 : mAdapter.getItemId(position);
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}
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public View getView(int position, View convertView, ViewGroup parent) {
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return getDropDownView(position, convertView, parent);
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}
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public View getDropDownView(int position, View convertView, ViewGroup parent) {
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return mAdapter == null ? null :
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mAdapter.getDropDownView(position, convertView, parent);
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}
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public boolean hasStableIds() {
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return mAdapter != null && mAdapter.hasStableIds();
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}
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public void registerDataSetObserver(DataSetObserver observer) {
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if (mAdapter != null) {
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mAdapter.registerDataSetObserver(observer);
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}
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}
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public void unregisterDataSetObserver(DataSetObserver observer) {
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if (mAdapter != null) {
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mAdapter.unregisterDataSetObserver(observer);
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}
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}
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/**
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* If the wrapped SpinnerAdapter is also a ListAdapter, delegate this call.
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* Otherwise, return true.
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*/
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public boolean areAllItemsEnabled() {
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final ListAdapter adapter = mListAdapter;
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if (adapter != null) {
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return adapter.areAllItemsEnabled();
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} else {
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return true;
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}
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}
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/**
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* If the wrapped SpinnerAdapter is also a ListAdapter, delegate this call.
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* Otherwise, return true.
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*/
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public boolean isEnabled(int position) {
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final ListAdapter adapter = mListAdapter;
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if (adapter != null) {
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return adapter.isEnabled(position);
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} else {
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return true;
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}
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}
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public int getItemViewType(int position) {
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return 0;
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}
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public int getViewTypeCount() {
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return 1;
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}
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public boolean isEmpty() {
|
|
return getCount() == 0;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Implements some sort of popup selection interface for selecting a spinner option.
|
|
* Allows for different spinner modes.
|
|
*/
|
|
private interface SpinnerPopup {
|
|
public void setAdapter(ListAdapter adapter);
|
|
|
|
/**
|
|
* Show the popup
|
|
*/
|
|
public void show();
|
|
|
|
/**
|
|
* Dismiss the popup
|
|
*/
|
|
public void dismiss();
|
|
|
|
/**
|
|
* @return true if the popup is showing, false otherwise.
|
|
*/
|
|
public boolean isShowing();
|
|
|
|
/**
|
|
* Set hint text to be displayed to the user. This should provide
|
|
* a description of the choice being made.
|
|
* @param hintText Hint text to set.
|
|
*/
|
|
public void setPromptText(CharSequence hintText);
|
|
public CharSequence getHintText();
|
|
}
|
|
|
|
/*
|
|
private class DialogPopup implements SpinnerPopup, DialogInterface.OnClickListener {
|
|
private AlertDialog mPopup;
|
|
private ListAdapter mListAdapter;
|
|
private CharSequence mPrompt;
|
|
|
|
public void dismiss() {
|
|
mPopup.dismiss();
|
|
mPopup = null;
|
|
}
|
|
|
|
public boolean isShowing() {
|
|
return mPopup != null ? mPopup.isShowing() : false;
|
|
}
|
|
|
|
public void setAdapter(ListAdapter adapter) {
|
|
mListAdapter = adapter;
|
|
}
|
|
|
|
public void setPromptText(CharSequence hintText) {
|
|
mPrompt = hintText;
|
|
}
|
|
|
|
public CharSequence getHintText() {
|
|
return mPrompt;
|
|
}
|
|
|
|
public void show() {
|
|
AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
|
|
if (mPrompt != null) {
|
|
builder.setTitle(mPrompt);
|
|
}
|
|
mPopup = builder.setSingleChoiceItems(mListAdapter,
|
|
getSelectedItemPosition(), this).show();
|
|
}
|
|
|
|
public void onClick(DialogInterface dialog, int which) {
|
|
setSelection(which);
|
|
dismiss();
|
|
}
|
|
}
|
|
*/
|
|
|
|
private class DropdownPopup extends IcsListPopupWindow implements SpinnerPopup {
|
|
private CharSequence mHintText;
|
|
private ListAdapter mAdapter;
|
|
|
|
public DropdownPopup(Context context, AttributeSet attrs, int defStyleRes) {
|
|
super(context, attrs, 0, defStyleRes);
|
|
|
|
setAnchorView(IcsSpinner.this);
|
|
setModal(true);
|
|
setPromptPosition(POSITION_PROMPT_ABOVE);
|
|
setOnItemClickListener(new OnItemClickListener() {
|
|
@SuppressWarnings("rawtypes")
|
|
public void onItemClick(AdapterView parent, View v, int position, long id) {
|
|
IcsSpinner.this.setSelection(position);
|
|
dismiss();
|
|
}
|
|
});
|
|
}
|
|
|
|
@Override
|
|
public void setAdapter(ListAdapter adapter) {
|
|
super.setAdapter(adapter);
|
|
mAdapter = adapter;
|
|
}
|
|
|
|
public CharSequence getHintText() {
|
|
return mHintText;
|
|
}
|
|
|
|
public void setPromptText(CharSequence hintText) {
|
|
// Hint text is ignored for dropdowns, but maintain it here.
|
|
mHintText = hintText;
|
|
}
|
|
|
|
@Override
|
|
public void show() {
|
|
final int spinnerPaddingLeft = IcsSpinner.this.getPaddingLeft();
|
|
if (mDropDownWidth == WRAP_CONTENT) {
|
|
final int spinnerWidth = IcsSpinner.this.getWidth();
|
|
final int spinnerPaddingRight = IcsSpinner.this.getPaddingRight();
|
|
setContentWidth(Math.max(
|
|
measureContentWidth((SpinnerAdapter) mAdapter, getBackground()),
|
|
spinnerWidth - spinnerPaddingLeft - spinnerPaddingRight));
|
|
} else if (mDropDownWidth == MATCH_PARENT) {
|
|
final int spinnerWidth = IcsSpinner.this.getWidth();
|
|
final int spinnerPaddingRight = IcsSpinner.this.getPaddingRight();
|
|
setContentWidth(spinnerWidth - spinnerPaddingLeft - spinnerPaddingRight);
|
|
} else {
|
|
setContentWidth(mDropDownWidth);
|
|
}
|
|
final Drawable background = getBackground();
|
|
int bgOffset = 0;
|
|
if (background != null) {
|
|
background.getPadding(mTempRect);
|
|
bgOffset = -mTempRect.left;
|
|
}
|
|
setHorizontalOffset(bgOffset + spinnerPaddingLeft);
|
|
setInputMethodMode(PopupWindow.INPUT_METHOD_NOT_NEEDED);
|
|
super.show();
|
|
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
|
|
setSelection(IcsSpinner.this.getSelectedItemPosition());
|
|
}
|
|
}
|
|
}
|