package com.mm.android.deviceaddmodule.mobilecommon.widget.antistatic.spinnerwheel;
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import android.content.Context;
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import android.content.res.TypedArray;
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import android.graphics.Canvas;
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import android.graphics.LinearGradient;
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import android.graphics.Shader;
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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.widget.LinearLayout;
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import com.mm.android.deviceaddmodule.R;
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/**
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* Spinner wheel vertical view.
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*/
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public class WheelVerticalView extends AbstractWheelView {
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private static int itemID = -1;
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@SuppressWarnings("unused")
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private final String LOG_TAG = WheelVerticalView.class.getName() + " #" + (++itemID);
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/**
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* The height of the selection divider.
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*/
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protected int mSelectionDividerHeight;
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// Cached item height
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private int mItemHeight = 0;
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//--------------------------------------------------------------------------
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//
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// Constructors
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//
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//--------------------------------------------------------------------------
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/**
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* Create a new wheel vertical view.
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*
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* @param context The application environment.
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*/
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public WheelVerticalView(Context context) {
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this(context, null);
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}
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/**
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* Create a new wheel vertical view.
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*
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* @param context The application environment.
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* @param attrs A collection of attributes.
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*/
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public WheelVerticalView(Context context, AttributeSet attrs) {
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this(context, attrs, R.attr.abstractWheelViewStyle);
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}
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/**
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* Create a new wheel vertical view.
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*
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* @param context the application environment.
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* @param attrs a collection of attributes.
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* @param defStyle The default style to apply to this view.
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*/
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public WheelVerticalView(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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}
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//--------------------------------------------------------------------------
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//
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// Initiating assets and setter for selector paint
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//
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//--------------------------------------------------------------------------
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@Override
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protected void initAttributes(AttributeSet attrs, int defStyle) {
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super.initAttributes(attrs, defStyle);
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TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.MobileCommonWheelVerticalView, defStyle, 0);
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mSelectionDividerHeight = a.getDimensionPixelSize(R.styleable.MobileCommonWheelVerticalView_selectionDividerHeight, DEF_SELECTION_DIVIDER_SIZE);
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a.recycle();
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}
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@Override
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public void setSelectorPaintCoeff(float coeff) {
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LinearGradient shader;
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int h = getMeasuredHeight();
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int ih = getItemDimension();
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float p1 = (1 - ih/(float) h)/2;
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float p2 = (1 + ih/(float) h)/2;
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float z = mItemsDimmedAlpha * (1 - coeff);
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float c1f = z + 255 * coeff;
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if (mVisibleItems == 2) {
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int c1 = Math.round( c1f ) << 24;
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int c2 = Math.round( z ) << 24;
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int[] colors = {c2, c1, 0xff000000, 0xff000000, c1, c2};
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float[] positions = { 0, p1, p1, p2, p2, 1};
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shader = new LinearGradient(0, 0, 0, h, colors, positions, Shader.TileMode.CLAMP);
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} else {
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float p3 = (1 - ih*3/(float) h)/2;
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float p4 = (1 + ih*3/(float) h)/2;
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float s = 255 * p3/p1;
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float c3f = s * coeff ; // here goes some optimized stuff
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float c2f = z + c3f;
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int c1 = Math.round( c1f ) << 24;
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int c2 = Math.round( c2f ) << 24;
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int c3 = Math.round( c3f ) << 24;
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int[] colors = {0, c3, c2, c1, 0xff000000, 0xff000000, c1, c2, c3, 0};
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float[] positions = {0, p3, p3, p1, p1, p2, p2, p4, p4, 1};
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shader = new LinearGradient(0, 0, 0, h, colors, positions, Shader.TileMode.CLAMP);
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}
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mSelectorWheelPaint.setShader(shader);
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invalidate();
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}
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//--------------------------------------------------------------------------
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//
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// Scroller-specific methods
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//
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//--------------------------------------------------------------------------
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@Override
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protected WheelScroller createScroller(WheelScroller.ScrollingListener scrollingListener) {
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return new WheelVerticalScroller(getContext(), scrollingListener);
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}
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@Override
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protected float getMotionEventPosition(MotionEvent event) {
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return event.getY();
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}
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//--------------------------------------------------------------------------
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//
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// Base measurements
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//
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//--------------------------------------------------------------------------
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@Override
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protected int getBaseDimension() {
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return getHeight();
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}
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/**
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* Returns height of the spinnerwheel
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* @return the item height
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*/
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@Override
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protected int getItemDimension() {
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if (mItemHeight != 0) {
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return mItemHeight;
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}
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if (mItemsLayout != null && mItemsLayout.getChildAt(0) != null) {
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mItemHeight = mItemsLayout.getChildAt(0).getMeasuredHeight();
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return mItemHeight;
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}
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return getBaseDimension() / mVisibleItems;
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}
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//--------------------------------------------------------------------------
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//
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// Layout creation and measurement operations
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//
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//--------------------------------------------------------------------------
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/**
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* Creates item layout if necessary
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*/
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@Override
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protected void createItemsLayout() {
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if (mItemsLayout == null) {
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mItemsLayout = new LinearLayout(getContext());
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mItemsLayout.setOrientation(LinearLayout.VERTICAL);
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}
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}
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@Override
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protected void doItemsLayout() {
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mItemsLayout.layout(0, 0, getMeasuredWidth() - 2 * mItemsPadding, getMeasuredHeight());
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}
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@Override
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protected void measureLayout() {
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mItemsLayout.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
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mItemsLayout.measure(
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View.MeasureSpec.makeMeasureSpec(getWidth() - 2 * mItemsPadding, View.MeasureSpec.EXACTLY),
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View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)
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);
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}
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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int widthMode = View.MeasureSpec.getMode(widthMeasureSpec);
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int heightMode = View.MeasureSpec.getMode(heightMeasureSpec);
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int widthSize = View.MeasureSpec.getSize(widthMeasureSpec);
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int heightSize = View.MeasureSpec.getSize(heightMeasureSpec);
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rebuildItems(); // rebuilding before measuring
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int width = calculateLayoutWidth(widthSize, widthMode);
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int height;
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if (heightMode == View.MeasureSpec.EXACTLY) {
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height = heightSize;
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} else {
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height = Math.max(
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getItemDimension() * (mVisibleItems - mItemOffsetPercent / 100),
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getSuggestedMinimumHeight()
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);
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if (heightMode == View.MeasureSpec.AT_MOST) {
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height = Math.min(height, heightSize);
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}
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}
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setMeasuredDimension(width, height);
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}
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/**
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* Calculates control width
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* @param widthSize the input layout width
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* @param mode the layout mode
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* @return the calculated control width
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*/
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private int calculateLayoutWidth(int widthSize, int mode) {
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mItemsLayout.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
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mItemsLayout.measure(
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View.MeasureSpec.makeMeasureSpec(widthSize, View.MeasureSpec.UNSPECIFIED),
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View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)
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);
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int width = mItemsLayout.getMeasuredWidth();
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if (mode == View.MeasureSpec.EXACTLY) {
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width = widthSize;
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} else {
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width += 2 * mItemsPadding;
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// Check against our minimum width
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width = Math.max(width, getSuggestedMinimumWidth());
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if (mode == View.MeasureSpec.AT_MOST && widthSize < width) {
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width = widthSize;
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}
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}
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// forcing recalculating
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mItemsLayout.measure(
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View.MeasureSpec.makeMeasureSpec(width - 2 * mItemsPadding, View.MeasureSpec.EXACTLY),
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View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED)
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);
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return width;
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}
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//--------------------------------------------------------------------------
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//
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// Drawing items
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//
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//--------------------------------------------------------------------------
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@Override
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protected void drawItems(Canvas canvas) {
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canvas.save();
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int w = getMeasuredWidth();
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int h = getMeasuredHeight();
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int ih = getItemDimension();
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// resetting intermediate bitmap and recreating canvases
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mSpinBitmap.eraseColor(0);
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Canvas c = new Canvas(mSpinBitmap);
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Canvas cSpin = new Canvas(mSpinBitmap);
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int top = (mCurrentItemIdx - mFirstItemIdx) * ih + (ih - getHeight()) / 2;
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c.translate(mItemsPadding, - top + mScrollingOffset);
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mItemsLayout.draw(c);
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// mSeparatorsBitmap.eraseColor(0);
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Canvas cSeparators = new Canvas(mSpinBitmap);
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if (mSelectionDivider != null) {
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// draw the top divider
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int topOfTopDivider = (getHeight() - ih - mSelectionDividerHeight) / 2;
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int bottomOfTopDivider = topOfTopDivider + mSelectionDividerHeight;
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mSelectionDivider.setBounds(0, topOfTopDivider, w, bottomOfTopDivider);
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mSelectionDivider.draw(cSeparators);
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// draw the bottom divider
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int topOfBottomDivider = topOfTopDivider + ih;
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int bottomOfBottomDivider = bottomOfTopDivider + ih;
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mSelectionDivider.setBounds(0, topOfBottomDivider, w, bottomOfBottomDivider);
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mSelectionDivider.draw(cSeparators);
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}
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cSpin.drawRect(0, 0, w, h, mSelectorWheelPaint);
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cSeparators.drawRect(0, 0, w, h, mSeparatorsPaint);
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canvas.drawBitmap(mSpinBitmap, 0, 0, null);
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canvas.drawBitmap(mSpinBitmap, 0, 0, null);
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canvas.restore();
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}
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}
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