package me.cafecode.lib.dotindicatorlib;
//from ww w . j av a 2 s .co m
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
/**
* Created by Natthawut Hemathulin on 11/20/14 AD.
* Email: [email protected]
*/
public class DotIndicator extends View {
private static final String TAG = "DotIndicator";
/**
* This class work with custom attributes(attrs.xml).
*/
private Bitmap mActiveDotBitmap;
private Bitmap mNormalDotBitmap;
private Context mContext;
private Paint mPaint;
// Attributes
private int mSize;
private int mSpace;
private int mRadius;
private Drawable mNormalDotDrawable;
private Drawable mActivedDotDrawable;
private int mActivedPosition;
private Canvas canvas;
// Work with ViewPager
// private ViewPager mPager;
public DotIndicator(Context context) {
super(context);
mContext = context;
initUI();
}
/**
* Important. It minimum to provide a constructor.
*
* @param context
* @param attrs
*/
public DotIndicator(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray typedArray = context.getTheme().obtainStyledAttributes(attrs, R.styleable.DotIndicator, 0, 0);
try {
mSize = typedArray.getInteger(R.styleable.DotIndicator_size, 0);
mSpace = typedArray.getDimensionPixelSize(R.styleable.DotIndicator_space, 0);
mRadius = typedArray.getDimensionPixelSize(R.styleable.DotIndicator_radius, 0);
mNormalDotDrawable = typedArray.getDrawable(R.styleable.DotIndicator_src_normal);
mActivedDotDrawable = typedArray.getDrawable(R.styleable.DotIndicator_src_actived);
} finally {
typedArray.recycle();
}
mContext = context;
initUI();
}
public DotIndicator(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContext = context;
initUI();
}
private void initUI() {
mActivedPosition = 0;
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
if (mNormalDotDrawable == null) {
mNormalDotBitmap = drawableToBitmap(getResources().getDrawable(R.drawable.dot_normal));
} else {
mNormalDotBitmap = drawableToBitmap(mNormalDotDrawable);
}
if (mActivedDotDrawable == null) {
mActiveDotBitmap = drawableToBitmap(getResources().getDrawable(R.drawable.dot_actived));
} else {
mActiveDotBitmap = drawableToBitmap(mActivedDotDrawable);
}
}
@Override
protected void onDraw(Canvas canvas) {
Log.i(TAG, "onDraw()");
super.onDraw(canvas);
this.canvas = canvas;
drawDot(canvas);
}
int widthMeasureSpec, heightMeasureSpec;
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
// Log.i(TAG, "onMeasure()");
// Background image's size
// int desiredWidth = getBackground().getIntrinsicWidth();
// int desiredHeight = getBackground().getIntrinsicHeight();
//
// int widthMode = MeasureSpec.getMode(widthMeasureSpec);
// int widthSize = MeasureSpec.getSize(widthMeasureSpec);
//
// int heightMode = MeasureSpec.getMode(heightMeasureSpec);
// this.widthMeasureSpec = widthMeasureSpec;
// this.heightMeasureSpec = heightMeasureSpec;
/*int width = ((mRadius*2)+mSpace)*mSize-mSpace;
width = resolveSize(width, widthMeasureSpec);
// width = MeasureSpec.getSize(widthMeasureSpec);
int height = mNormalDotBitmap.getHeight();
height = resolveSize(height, heightMeasureSpec);
setMeasuredDimension(width, height);*/
updateMeasuredDimension();
// setMeasuredDimension(getMeasuredWidth(), getMeasuredHeight());
}
private void updateMeasuredDimension() {
if (mSize < 1) {
setMeasuredDimension(0, 0);
return;
}
int widthMode = MeasureSpec.getMode(widthMeasureSpec);
int heightMode = MeasureSpec.getMode(heightMeasureSpec);
Log.i(TAG, "WM: "+widthMode+", HM: "+heightMode);
int width = (mRadius*2+mSpace)*mSize-mSpace;
width = resolveSizeAndState(width, widthMeasureSpec, 1);
width = MeasureSpec.getSize(width);
int height = mNormalDotBitmap.getHeight();
height = resolveSizeAndState(height, heightMeasureSpec, 0);
height = MeasureSpec.getSize(height);
Log.i(TAG, "WF: "+width+", HF: "+height);
setMeasuredDimension(width, height);
}
private void drawDot(Canvas canvas) {
int axisX = 0;
for (int i = 0; i < mSize; i++) {
if (i == mActivedPosition) {
canvas.drawBitmap(mActiveDotBitmap, axisX, 0, mPaint);
} else {
canvas.drawBitmap(mNormalDotBitmap, axisX, 0, mPaint);
}
axisX += mNormalDotBitmap.getWidth()+mSpace;
}
}
public int getViewWidth() {
if (mSpace == 0) {
return mSize *mNormalDotBitmap.getWidth();
}
return mSize *(mNormalDotBitmap.getWidth()+mSpace)-mSpace;
}
public int getTotalDots() {
return mSize;
}
public void setTotalDots(int mTotalDots) {
this.mSize = mTotalDots;
}
public int getActivedPosition() {
return mActivedPosition;
}
public void setActivedPosition(int activedPosition) {
mActivedPosition = activedPosition;
invalidate();
}
public void setPager(ViewPager viewPager) {
mSize = viewPager.getAdapter().getCount();
invalidate();
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int i, float v, int i2) {
setActivedPosition(i);
}
@Override
public void onPageSelected(int i) {
}
@Override
public void onPageScrollStateChanged(int i) {
}
});
}
public void update() {
// drawDot(canvas);
invalidate();
}
/**
* Convert drawable to bitmap
* @param drawable is Drawable
* @return Bitmap
*/
private Bitmap drawableToBitmap (Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable) drawable).getBitmap();
}
Bitmap bitmap;
if (mRadius == 0) {
// Default dot radius size
bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
} else {
// Specify dot radius size
bitmap = Bitmap.createBitmap(mRadius*2, mRadius*2, Bitmap.Config.ARGB_8888);
}
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
public void setViewPager(ViewPager pager) {
pager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
setActivedPosition(position);
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
}
