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@@ -1,964 +0,0 @@
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-/*
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- * Android Wheel Control.
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- * https://code.google.com/p/android-wheel/
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- *
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- * Copyright 2011 Yuri Kanivets
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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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-
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-package com.yanyi.datelib.wheelview;
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-
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-import android.content.Context;
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-import android.database.DataSetObserver;
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-import android.graphics.Canvas;
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-import android.graphics.Color;
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-import android.graphics.Paint;
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-import android.graphics.drawable.Drawable;
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-import android.graphics.drawable.GradientDrawable;
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-import android.graphics.drawable.GradientDrawable.Orientation;
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-import android.util.AttributeSet;
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-import android.view.MotionEvent;
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-import android.view.View;
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-import android.view.ViewGroup.LayoutParams;
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-import android.view.animation.Interpolator;
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-import android.widget.LinearLayout;
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-
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-import com.yanyi.datelib.R;
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-
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-import java.util.LinkedList;
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-import java.util.List;
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-
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-/**
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- * Numeric wheel view.
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- *
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- * @author myLove
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- */
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-public class WheelView extends View {
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-
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- /** Top and bottom shadows colors */
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- /*/ Modified by wulianghuan 2014-11-25
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- private int[] SHADOWS_COLORS = new int[] { 0xFF111111,
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- 0x00AAAAAA, 0x00AAAAAA };
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- //*/
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- private int[] SHADOWS_COLORS = new int[] {0xFFFFFFFF, 0x00FFFFFF, 0x00FFFFFF };
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-
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- /** Top and bottom items offset (to hide that) */
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- private static final int ITEM_OFFSET_PERCENT = 0;
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-
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- /** Left and right padding value */
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- private static final int PADDING = 10;
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-
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- /** Default count of visible items */
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- private static final int DEF_VISIBLE_ITEMS = 5;
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-
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- // Wheel Values
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- private int currentItem = 0;
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-
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- // Count of visible items
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- private int visibleItems = DEF_VISIBLE_ITEMS;
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-
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- // Item height
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- private int itemHeight = 0;
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-
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- // Center Line
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- private Drawable centerDrawable;
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-
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- // Wheel drawables
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- private int wheelBackground = R.drawable.wheel_bg;
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- private int wheelForeground = R.drawable.wheel_val;
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-
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- // Shadows drawables
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- private GradientDrawable topShadow;
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- private GradientDrawable bottomShadow;
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-
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- // Draw Shadows
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- private boolean drawShadows = true;
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-
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- // Scrolling
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- private WheelScroller scroller;
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- private boolean isScrollingPerformed;
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- private int scrollingOffset;
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-
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- // Cyclic
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- boolean isCyclic = false;
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-
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- // Items layout
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- private LinearLayout itemsLayout;
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-
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- // The number of first item in layout
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- private int firstItem;
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-
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- // View adapter
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- private WheelViewAdapter viewAdapter;
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-
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- // Recycle
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- private WheelRecycle recycle = new WheelRecycle(this);
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-
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- // Listeners
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- private List<OnWheelChangedListener> changingListeners = new LinkedList<OnWheelChangedListener>();
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- private List<OnWheelScrollListener> scrollingListeners = new LinkedList<OnWheelScrollListener>();
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- private List<OnWheelClickedListener> clickingListeners = new LinkedList<OnWheelClickedListener>();
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-
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- String label="";
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-
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- /**
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- * Constructor
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- */
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- public WheelView(Context context, AttributeSet attrs, int defStyle) {
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- super(context, attrs, defStyle);
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- initData(context);
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- }
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-
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- /**
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- * Constructor
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- */
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- public WheelView(Context context, AttributeSet attrs) {
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- super(context, attrs);
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- initData(context);
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- }
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-
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- /**
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- * Constructor
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- */
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- public WheelView(Context context) {
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- super(context);
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- initData(context);
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- }
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-
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- /**
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- * Initializes class data
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- * @param context the context
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- */
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- private void initData(Context context) {
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- scroller = new WheelScroller(getContext(), scrollingListener);
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- }
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-
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- // Scrolling listener
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- WheelScroller.ScrollingListener scrollingListener = new WheelScroller.ScrollingListener() {
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- @Override
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- public void onStarted() {
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- isScrollingPerformed = true;
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- notifyScrollingListenersAboutStart();
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- }
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-
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- @Override
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- public void onScroll(int distance) {
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- doScroll(distance);
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-
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- int height = getHeight();
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- if (scrollingOffset > height) {
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- scrollingOffset = height;
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- scroller.stopScrolling();
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- } else if (scrollingOffset < -height) {
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- scrollingOffset = -height;
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- scroller.stopScrolling();
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- }
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- }
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-
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- @Override
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- public void onFinished() {
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- if (isScrollingPerformed) {
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- notifyScrollingListenersAboutEnd();
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- isScrollingPerformed = false;
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- }
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-
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- scrollingOffset = 0;
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- invalidate();
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- }
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-
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- @Override
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- public void onJustify() {
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- if (Math.abs(scrollingOffset) > WheelScroller.MIN_DELTA_FOR_SCROLLING) {
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- scroller.scroll(scrollingOffset, 0);
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- }
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- }
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- };
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-
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- /**
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- * Set the the specified scrolling interpolator
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- * @param interpolator the interpolator
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- */
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- public void setInterpolator(Interpolator interpolator) {
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- scroller.setInterpolator(interpolator);
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- }
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-
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- /**
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- * Gets count of visible items
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- *
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- * @return the count of visible items
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- */
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- public int getVisibleItems() {
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- return visibleItems;
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- }
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-
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- /**
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- * Sets the desired count of visible items.
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- * Actual amount of visible items depends on wheel layout parameters.
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- * To apply changes and rebuild view call measure().
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- *
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- * @param count the desired count for visible items
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- */
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- public void setVisibleItems(int count) {
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- visibleItems = count;
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- }
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-
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- /**
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- * Gets view adapter
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- * @return the view adapter
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- */
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- public WheelViewAdapter getViewAdapter() {
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- return viewAdapter;
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- }
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-
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- // Adapter listener
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- private DataSetObserver dataObserver = new DataSetObserver() {
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- @Override
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- public void onChanged() {
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- invalidateWheel(false);
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- }
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-
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- @Override
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- public void onInvalidated() {
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- invalidateWheel(true);
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- }
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- };
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-
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- /**
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- * Sets view adapter. Usually new adapters contain different views, so
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- * it needs to rebuild view by calling measure().
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- *
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- * @param viewAdapter the view adapter
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- */
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- public void setViewAdapter(WheelViewAdapter viewAdapter) {
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- if (this.viewAdapter != null) {
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- this.viewAdapter.unregisterDataSetObserver(dataObserver);
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- }
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- this.viewAdapter = viewAdapter;
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- if (this.viewAdapter != null) {
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- this.viewAdapter.registerDataSetObserver(dataObserver);
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- }
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-
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- invalidateWheel(true);
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- }
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-
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- /**
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- * Adds wheel changing listener
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- * @param listener the listener
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- */
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- public void addChangingListener(OnWheelChangedListener listener) {
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- changingListeners.add(listener);
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- }
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-
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- /**
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- * Removes wheel changing listener
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- * @param listener the listener
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- */
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- public void removeChangingListener(OnWheelChangedListener listener) {
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- changingListeners.remove(listener);
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- }
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-
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- /**
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- * Notifies changing listeners
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- * @param oldValue the old wheel value
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- * @param newValue the new wheel value
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- */
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- protected void notifyChangingListeners(int oldValue, int newValue) {
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- for (OnWheelChangedListener listener : changingListeners) {
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- listener.onChanged(this, oldValue, newValue);
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- }
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- }
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-
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- /**
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- * Adds wheel scrolling listener
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- * @param listener the listener
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- */
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- public void addScrollingListener(OnWheelScrollListener listener) {
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- scrollingListeners.add(listener);
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- }
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-
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- /**
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- * Removes wheel scrolling listener
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- * @param listener the listener
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- */
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- public void removeScrollingListener(OnWheelScrollListener listener) {
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- scrollingListeners.remove(listener);
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- }
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-
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- /**
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- * Notifies listeners about starting scrolling
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- */
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- protected void notifyScrollingListenersAboutStart() {
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- for (OnWheelScrollListener listener : scrollingListeners) {
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- listener.onScrollingStarted(this);
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- }
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- }
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-
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- /**
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- * Notifies listeners about ending scrolling
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- */
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- protected void notifyScrollingListenersAboutEnd() {
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- for (OnWheelScrollListener listener : scrollingListeners) {
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- listener.onScrollingFinished(this);
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- }
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- }
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-
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- /**
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- * Adds wheel clicking listener
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- * @param listener the listener
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- */
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- public void addClickingListener(OnWheelClickedListener listener) {
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- clickingListeners.add(listener);
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- }
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-
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- /**
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- * Removes wheel clicking listener
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- * @param listener the listener
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- */
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- public void removeClickingListener(OnWheelClickedListener listener) {
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- clickingListeners.remove(listener);
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- }
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-
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- /**
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- * Notifies listeners about clicking
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- */
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- protected void notifyClickListenersAboutClick(int item) {
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- for (OnWheelClickedListener listener : clickingListeners) {
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- listener.onItemClicked(this, item);
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- }
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- }
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-
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- /**
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- * Gets current value
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- *
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- * @return the current value
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- */
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- public int getCurrentItem() {
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- return currentItem;
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- }
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-
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- /**
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- * Sets the current item. Does nothing when index is wrong.
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- *
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- * @param index the item index
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- * @param animated the animation flag
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- */
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- public void setCurrentItem(int index, boolean animated) {
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- if (viewAdapter == null || viewAdapter.getItemsCount() == 0) {
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- return; // throw?
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- }
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-
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- int itemCount = viewAdapter.getItemsCount();
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- if (index < 0 || index >= itemCount) {
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- if (isCyclic) {
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- while (index < 0) {
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- index += itemCount;
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- }
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- index %= itemCount;
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- } else{
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- return; // throw?
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- }
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- }
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- if (index != currentItem) {
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- if (animated) {
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- int itemsToScroll = index - currentItem;
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- if (isCyclic) {
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- int scroll = itemCount + Math.min(index, currentItem) - Math.max(index, currentItem);
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- if (scroll < Math.abs(itemsToScroll)) {
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- itemsToScroll = itemsToScroll < 0 ? scroll : -scroll;
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- }
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- }
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- scroll(itemsToScroll, 0);
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- } else {
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- scrollingOffset = 0;
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-
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- int old = currentItem;
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- currentItem = index;
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-
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- notifyChangingListeners(old, currentItem);
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-
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- invalidate();
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- }
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- }
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- }
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-
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- /**
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- * Sets the current item w/o animation. Does nothing when index is wrong.
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- *
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- * @param index the item index
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- */
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- public void setCurrentItem(int index) {
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- setCurrentItem(index, false);
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- }
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-
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- /**
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- * Tests if wheel is cyclic. That means before the 1st item there is shown the last one
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- * @return true if wheel is cyclic
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- */
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- public boolean isCyclic() {
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- return isCyclic;
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- }
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-
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- /**
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- * Set wheel cyclic flag
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- * @param isCyclic the flag to set
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- */
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- public void setCyclic(boolean isCyclic) {
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- this.isCyclic = isCyclic;
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- invalidateWheel(false);
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- }
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-
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- /**
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- * Determine whether shadows are drawn
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- * @return true is shadows are drawn
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- */
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- public boolean drawShadows() {
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- return drawShadows;
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- }
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-
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- /**
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- * Set whether shadows should be drawn
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- * @param drawShadows flag as true or false
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- */
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- public void setDrawShadows(boolean drawShadows) {
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- this.drawShadows = drawShadows;
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- }
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-
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- /**
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- * Set the shadow gradient color
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- * @param start
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- * @param middle
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- * @param end
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- */
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- public void setShadowColor(int start, int middle, int end) {
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- SHADOWS_COLORS = new int[] {start, middle, end};
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- }
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-
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- /**
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- * Sets the drawable for the wheel background
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- * @param resource
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- */
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- public void setWheelBackground(int resource) {
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- wheelBackground = resource;
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- setBackgroundResource(wheelBackground);
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- }
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-
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- /**
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- * Sets the drawable for the wheel foreground
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- * @param resource
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- */
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- public void setWheelForeground(int resource) {
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- wheelForeground = resource;
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- centerDrawable = getContext().getResources().getDrawable(wheelForeground);
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- }
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-
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- /**
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- * Invalidates wheel
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- * @param clearCaches if true then cached views will be clear
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- */
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- public void invalidateWheel(boolean clearCaches) {
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|
|
- if (clearCaches) {
|
|
|
- recycle.clearAll();
|
|
|
- if (itemsLayout != null) {
|
|
|
- itemsLayout.removeAllViews();
|
|
|
- }
|
|
|
- scrollingOffset = 0;
|
|
|
- } else if (itemsLayout != null) {
|
|
|
- // cache all items
|
|
|
- recycle.recycleItems(itemsLayout, firstItem, new ItemsRange());
|
|
|
- }
|
|
|
-
|
|
|
- invalidate();
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Initializes resources
|
|
|
- */
|
|
|
- private void initResourcesIfNecessary() {
|
|
|
- if (centerDrawable == null) {
|
|
|
- centerDrawable = getContext().getResources().getDrawable(wheelForeground);
|
|
|
- }
|
|
|
-
|
|
|
- if (topShadow == null) {
|
|
|
- topShadow = new GradientDrawable(Orientation.TOP_BOTTOM, SHADOWS_COLORS);
|
|
|
- }
|
|
|
-
|
|
|
- if (bottomShadow == null) {
|
|
|
- bottomShadow = new GradientDrawable(Orientation.BOTTOM_TOP, SHADOWS_COLORS);
|
|
|
- }
|
|
|
-
|
|
|
- setBackgroundResource(wheelBackground);
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Calculates desired height for layout
|
|
|
- *
|
|
|
- * @param layout
|
|
|
- * the source layout
|
|
|
- * @return the desired layout height
|
|
|
- */
|
|
|
- private int getDesiredHeight(LinearLayout layout) {
|
|
|
- if (layout != null && layout.getChildAt(0) != null) {
|
|
|
- itemHeight = layout.getChildAt(0).getMeasuredHeight();
|
|
|
- }
|
|
|
-
|
|
|
- int desired = itemHeight * visibleItems - itemHeight * ITEM_OFFSET_PERCENT / 50;
|
|
|
-
|
|
|
- return Math.max(desired, getSuggestedMinimumHeight());
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Returns height of wheel item
|
|
|
- * @return the item height
|
|
|
- */
|
|
|
- private int getItemHeight() {
|
|
|
- if (itemHeight != 0) {
|
|
|
- return itemHeight;
|
|
|
- }
|
|
|
-
|
|
|
- if (itemsLayout != null && itemsLayout.getChildAt(0) != null) {
|
|
|
- itemHeight = itemsLayout.getChildAt(0).getHeight();
|
|
|
- return itemHeight;
|
|
|
- }
|
|
|
-
|
|
|
- return getHeight() / visibleItems;
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Calculates control width and creates text layouts
|
|
|
- * @param widthSize the input layout width
|
|
|
- * @param mode the layout mode
|
|
|
- * @return the calculated control width
|
|
|
- */
|
|
|
- private int calculateLayoutWidth(int widthSize, int mode) {
|
|
|
- initResourcesIfNecessary();
|
|
|
-
|
|
|
- // TODO: make it static
|
|
|
- itemsLayout.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
|
|
|
- itemsLayout.measure(MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.UNSPECIFIED),
|
|
|
- MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
|
|
|
- int width = itemsLayout.getMeasuredWidth();
|
|
|
-
|
|
|
- if (mode == MeasureSpec.EXACTLY) {
|
|
|
- width = widthSize;
|
|
|
- } else {
|
|
|
- width += 2 * PADDING;
|
|
|
-
|
|
|
- // Check against our minimum width
|
|
|
- width = Math.max(width, getSuggestedMinimumWidth());
|
|
|
-
|
|
|
- if (mode == MeasureSpec.AT_MOST && widthSize < width) {
|
|
|
- width = widthSize;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- itemsLayout.measure(MeasureSpec.makeMeasureSpec(width - 2 * PADDING, MeasureSpec.EXACTLY),
|
|
|
- MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
|
|
|
-
|
|
|
- return width;
|
|
|
- }
|
|
|
-
|
|
|
- @Override
|
|
|
- protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
|
|
|
- int widthMode = MeasureSpec.getMode(widthMeasureSpec);
|
|
|
- int heightMode = MeasureSpec.getMode(heightMeasureSpec);
|
|
|
- int widthSize = MeasureSpec.getSize(widthMeasureSpec);
|
|
|
- int heightSize = MeasureSpec.getSize(heightMeasureSpec);
|
|
|
-
|
|
|
- buildViewForMeasuring();
|
|
|
-
|
|
|
- int width = calculateLayoutWidth(widthSize, widthMode);
|
|
|
-
|
|
|
- int height;
|
|
|
- if (heightMode == MeasureSpec.EXACTLY) {
|
|
|
- height = heightSize;
|
|
|
- } else {
|
|
|
- height = getDesiredHeight(itemsLayout);
|
|
|
-
|
|
|
- if (heightMode == MeasureSpec.AT_MOST) {
|
|
|
- height = Math.min(height, heightSize);
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- setMeasuredDimension(width, height);
|
|
|
- }
|
|
|
-
|
|
|
- @Override
|
|
|
- protected void onLayout(boolean changed, int l, int t, int r, int b) {
|
|
|
- layout(r - l, b - t);
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Sets layouts width and height
|
|
|
- * @param width the layout width
|
|
|
- * @param height the layout height
|
|
|
- */
|
|
|
- private void layout(int width, int height) {
|
|
|
- int itemsWidth = width - 2 * PADDING;
|
|
|
-
|
|
|
- itemsLayout.layout(0, 0, itemsWidth, height);
|
|
|
- }
|
|
|
-
|
|
|
- @Override
|
|
|
- protected void onDraw(Canvas canvas) {
|
|
|
- super.onDraw(canvas);
|
|
|
-
|
|
|
- if (viewAdapter != null && viewAdapter.getItemsCount() > 0) {
|
|
|
- updateView();
|
|
|
-
|
|
|
- drawItems(canvas);
|
|
|
- drawCenterRect(canvas);
|
|
|
- }
|
|
|
-
|
|
|
- if (drawShadows) {
|
|
|
- drawShadows(canvas);
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Draws shadows on top and bottom of control
|
|
|
- * @param canvas the canvas for drawing
|
|
|
- */
|
|
|
- private void drawShadows(Canvas canvas) {
|
|
|
- /*/ Modified by wulianghuan 2014-11-25
|
|
|
- int height = (int)(1.5 * getItemHeight());
|
|
|
- //*/
|
|
|
- int height = (int)(3 * getItemHeight());
|
|
|
- //*/
|
|
|
- //topShadow.setBounds(0, 0, getWidth(), height);
|
|
|
- topShadow.setBounds(0, 0, getWidth(), getHeight());
|
|
|
- topShadow.draw(canvas);
|
|
|
-
|
|
|
- //bottomShadow.setBounds(0, getHeight() - height, getWidth(), getHeight());
|
|
|
- bottomShadow.setBounds(0, 0, getWidth(), getHeight());
|
|
|
- bottomShadow.draw(canvas);
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Draws items
|
|
|
- * @param canvas the canvas for drawing
|
|
|
- */
|
|
|
- private void drawItems(Canvas canvas) {
|
|
|
- canvas.save();
|
|
|
-
|
|
|
- int top = (currentItem - firstItem) * getItemHeight() + (getItemHeight() - getHeight()) / 2;
|
|
|
- canvas.translate(PADDING, - top + scrollingOffset);
|
|
|
-
|
|
|
- itemsLayout.draw(canvas);
|
|
|
-
|
|
|
- canvas.restore();
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Draws rect for current value
|
|
|
- * @param canvas the canvas for drawing
|
|
|
- */
|
|
|
- private void drawCenterRect(Canvas canvas) {
|
|
|
- int center = getHeight() / 2;
|
|
|
- int offset = (int) (getItemHeight() / 2 * 1.2);
|
|
|
-// int offset = 60;
|
|
|
- /*/ Remarked by wulianghuan 2014-11-27 使用自己的画线,而不是描边
|
|
|
- Rect rect = new Rect(left, top, right, bottom)
|
|
|
- centerDrawable.setBounds(bounds)
|
|
|
- centerDrawable.setBounds(0, center - offset, getWidth(), center + offset);
|
|
|
- centerDrawable.draw(canvas);
|
|
|
- //*/
|
|
|
- Paint paint = new Paint();
|
|
|
- paint.setColor(Color.parseColor("#D0D0D0"));
|
|
|
- // 设置线宽
|
|
|
-// paint.setStrokeWidth((float) 3);
|
|
|
- paint.setStrokeWidth((float) 2);
|
|
|
- // 绘制上边直线
|
|
|
- canvas.drawLine(0, center - offset, getWidth(), center - offset, paint);
|
|
|
- // 绘制下边直线
|
|
|
- canvas.drawLine(0, center + offset, getWidth(), center + offset, paint);
|
|
|
- //*/
|
|
|
- }
|
|
|
-
|
|
|
- @Override
|
|
|
- public boolean onTouchEvent(MotionEvent event) {
|
|
|
- if (!isEnabled() || getViewAdapter() == null) {
|
|
|
- return true;
|
|
|
- }
|
|
|
-
|
|
|
- switch (event.getAction()) {
|
|
|
- case MotionEvent.ACTION_MOVE:
|
|
|
- if (getParent() != null) {
|
|
|
- getParent().requestDisallowInterceptTouchEvent(true);
|
|
|
- }
|
|
|
- break;
|
|
|
-
|
|
|
- case MotionEvent.ACTION_UP:
|
|
|
- if (!isScrollingPerformed) {
|
|
|
- int distance = (int) event.getY() - getHeight() / 2;
|
|
|
- if (distance > 0) {
|
|
|
- distance += getItemHeight() / 2;
|
|
|
- } else {
|
|
|
- distance -= getItemHeight() / 2;
|
|
|
- }
|
|
|
- int items = distance / getItemHeight();
|
|
|
- if (items != 0 && isValidItemIndex(currentItem + items)) {
|
|
|
- notifyClickListenersAboutClick(currentItem + items);
|
|
|
- }
|
|
|
- }
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- return scroller.onTouchEvent(event);
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Scrolls the wheel
|
|
|
- * @param delta the scrolling value
|
|
|
- */
|
|
|
- private void doScroll(int delta) {
|
|
|
- scrollingOffset += delta;
|
|
|
-
|
|
|
- int itemHeight = getItemHeight();
|
|
|
- int count = scrollingOffset / itemHeight;
|
|
|
-
|
|
|
- int pos = currentItem - count;
|
|
|
- int itemCount = viewAdapter.getItemsCount();
|
|
|
-
|
|
|
- int fixPos = scrollingOffset % itemHeight;
|
|
|
- if (Math.abs(fixPos) <= itemHeight / 2) {
|
|
|
- fixPos = 0;
|
|
|
- }
|
|
|
- if (isCyclic && itemCount > 0) {
|
|
|
- if (fixPos > 0) {
|
|
|
- pos--;
|
|
|
- count++;
|
|
|
- } else if (fixPos < 0) {
|
|
|
- pos++;
|
|
|
- count--;
|
|
|
- }
|
|
|
- // fix position by rotating
|
|
|
- while (pos < 0) {
|
|
|
- pos += itemCount;
|
|
|
- }
|
|
|
- pos %= itemCount;
|
|
|
- } else {
|
|
|
- //
|
|
|
- if (pos < 0) {
|
|
|
- count = currentItem;
|
|
|
- pos = 0;
|
|
|
- } else if (pos >= itemCount) {
|
|
|
- count = currentItem - itemCount + 1;
|
|
|
- pos = itemCount - 1;
|
|
|
- } else if (pos > 0 && fixPos > 0) {
|
|
|
- pos--;
|
|
|
- count++;
|
|
|
- } else if (pos < itemCount - 1 && fixPos < 0) {
|
|
|
- pos++;
|
|
|
- count--;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- int offset = scrollingOffset;
|
|
|
- if (pos != currentItem) {
|
|
|
- setCurrentItem(pos, false);
|
|
|
- } else {
|
|
|
- invalidate();
|
|
|
- }
|
|
|
-
|
|
|
- // update offset
|
|
|
- scrollingOffset = offset - count * itemHeight;
|
|
|
- if (scrollingOffset > getHeight()) {
|
|
|
- scrollingOffset = scrollingOffset % getHeight() + getHeight();
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Scroll the wheel
|
|
|
- * @param itemsToScroll items to scroll
|
|
|
- * @param time scrolling duration
|
|
|
- */
|
|
|
- public void scroll(int itemsToScroll, int time) {
|
|
|
- int distance = itemsToScroll * getItemHeight() - scrollingOffset;
|
|
|
- scroller.scroll(distance, time);
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Calculates range for wheel items
|
|
|
- * @return the items range
|
|
|
- */
|
|
|
- private ItemsRange getItemsRange() {
|
|
|
- if (getItemHeight() == 0) {
|
|
|
- return null;
|
|
|
- }
|
|
|
-
|
|
|
- int first = currentItem;
|
|
|
- int count = 1;
|
|
|
-
|
|
|
- while (count * getItemHeight() < getHeight()) {
|
|
|
- first--;
|
|
|
- count += 2; // top + bottom items
|
|
|
- }
|
|
|
-
|
|
|
- if (scrollingOffset != 0) {
|
|
|
- if (scrollingOffset > 0) {
|
|
|
- first--;
|
|
|
- }
|
|
|
- count++;
|
|
|
-
|
|
|
- // process empty items above the first or below the second
|
|
|
- int emptyItems = scrollingOffset / getItemHeight();
|
|
|
- first -= emptyItems;
|
|
|
- count += Math.asin(emptyItems);
|
|
|
- }
|
|
|
- return new ItemsRange(first, count);
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Rebuilds wheel items if necessary. Caches all unused items.
|
|
|
- *
|
|
|
- * @return true if items are rebuilt
|
|
|
- */
|
|
|
- private boolean rebuildItems() {
|
|
|
- boolean updated = false;
|
|
|
- ItemsRange range = getItemsRange();
|
|
|
- if (itemsLayout != null) {
|
|
|
- int first = recycle.recycleItems(itemsLayout, firstItem, range);
|
|
|
- updated = firstItem != first;
|
|
|
- firstItem = first;
|
|
|
- } else {
|
|
|
- createItemsLayout();
|
|
|
- updated = true;
|
|
|
- }
|
|
|
-
|
|
|
- if (!updated) {
|
|
|
- updated = firstItem != range.getFirst() || itemsLayout.getChildCount() != range.getCount();
|
|
|
- }
|
|
|
-
|
|
|
- if (firstItem > range.getFirst() && firstItem <= range.getLast()) {
|
|
|
- for (int i = firstItem - 1; i >= range.getFirst(); i--) {
|
|
|
- if (!addViewItem(i, true)) {
|
|
|
- break;
|
|
|
- }
|
|
|
- firstItem = i;
|
|
|
- }
|
|
|
- } else {
|
|
|
- firstItem = range.getFirst();
|
|
|
- }
|
|
|
-
|
|
|
- int first = firstItem;
|
|
|
- for (int i = itemsLayout.getChildCount(); i < range.getCount(); i++) {
|
|
|
- if (!addViewItem(firstItem + i, false) && itemsLayout.getChildCount() == 0) {
|
|
|
- first++;
|
|
|
- }
|
|
|
- }
|
|
|
- firstItem = first;
|
|
|
-
|
|
|
- return updated;
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Updates view. Rebuilds items and label if necessary, recalculate items sizes.
|
|
|
- */
|
|
|
- private void updateView() {
|
|
|
- if (rebuildItems()) {
|
|
|
- calculateLayoutWidth(getWidth(), MeasureSpec.EXACTLY);
|
|
|
- layout(getWidth(), getHeight());
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Creates item layouts if necessary
|
|
|
- */
|
|
|
- private void createItemsLayout() {
|
|
|
- if (itemsLayout == null) {
|
|
|
- itemsLayout = new LinearLayout(getContext());
|
|
|
- itemsLayout.setOrientation(LinearLayout.VERTICAL);
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Builds view for measuring
|
|
|
- */
|
|
|
- private void buildViewForMeasuring() {
|
|
|
- // clear all items
|
|
|
- if (itemsLayout != null) {
|
|
|
- recycle.recycleItems(itemsLayout, firstItem, new ItemsRange());
|
|
|
- } else {
|
|
|
- createItemsLayout();
|
|
|
- }
|
|
|
-
|
|
|
- // add views
|
|
|
- int addItems = visibleItems / 2;
|
|
|
- for (int i = currentItem + addItems; i >= currentItem - addItems; i--) {
|
|
|
- if (addViewItem(i, true)) {
|
|
|
- firstItem = i;
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Adds view for item to items layout
|
|
|
- * @param index the item index
|
|
|
- * @param first the flag indicates if view should be first
|
|
|
- * @return true if corresponding item exists and is added
|
|
|
- */
|
|
|
- private boolean addViewItem(int index, boolean first) {
|
|
|
- View view = getItemView(index);
|
|
|
- if (view != null) {
|
|
|
- if (first) {
|
|
|
- itemsLayout.addView(view, 0);
|
|
|
- } else {
|
|
|
- itemsLayout.addView(view);
|
|
|
- }
|
|
|
-
|
|
|
- return true;
|
|
|
- }
|
|
|
-
|
|
|
- return false;
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Checks whether intem index is valid
|
|
|
- * @param index the item index
|
|
|
- * @return true if item index is not out of bounds or the wheel is cyclic
|
|
|
- */
|
|
|
- private boolean isValidItemIndex(int index) {
|
|
|
- return viewAdapter != null && viewAdapter.getItemsCount() > 0 &&
|
|
|
- (isCyclic || index >= 0 && index < viewAdapter.getItemsCount());
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Returns view for specified item
|
|
|
- * @param index the item index
|
|
|
- * @return item view or empty view if index is out of bounds
|
|
|
- */
|
|
|
- private View getItemView(int index) {
|
|
|
- if (viewAdapter == null || viewAdapter.getItemsCount() == 0) {
|
|
|
- return null;
|
|
|
- }
|
|
|
- int count = viewAdapter.getItemsCount();
|
|
|
- if (!isValidItemIndex(index)) {
|
|
|
- return viewAdapter.getEmptyItem(recycle.getEmptyItem(), itemsLayout);
|
|
|
- } else {
|
|
|
- while (index < 0) {
|
|
|
- index = count + index;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- index %= count;
|
|
|
- return viewAdapter.getItem(index, recycle.getItem(), itemsLayout);
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * Stops scrolling
|
|
|
- */
|
|
|
- public void stopScrolling() {
|
|
|
- scroller.stopScrolling();
|
|
|
- }
|
|
|
-}
|