package zrc.widget;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Align;
import android.graphics.Paint.Style;
import android.util.TypedValue;
import android.widget.Toast;
public class SimpleHeader implements Headable {
private float PI = (float) Math.PI;
private int mState = STATE_REST;
private int mPice = 6;
private Paint mPaint;
private int mHeight = 0;
private int mTime = 0;
private int mTextColor;
private int mPointColor;
private float mPointRadius = 0;
private float mCircleRadius = 0;
private float mFontOffset;
private String mMsg;
private boolean isClipCanvas = true;
public SimpleHeader(Context context) {
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setStyle(Style.FILL);
int fontSize = (int) TypedValue
.applyDimension(TypedValue.COMPLEX_UNIT_SP, 20, context.getResources()
.getDisplayMetrics());
mPaint.setTextSize(fontSize);
mPaint.setTextAlign(Align.CENTER);
mTextColor = 0xffffffff;
mPointColor = 0xffffffff;
mFontOffset = -(mPaint.getFontMetrics().top + mPaint.getFontMetrics().bottom) / 2;
mHeight = (int) TypedValue
.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 45, context.getResources()
.getDisplayMetrics());
mPointRadius =
TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2.5f, context.getResources()
.getDisplayMetrics());
mCircleRadius = mPointRadius * 3.5f;
}
public void setTextColor(int color) {
mTextColor = color;
}
public void setCircleColor(int color) {
mPointColor = color;
}
public void setIsClipCanvas(boolean bool) {
isClipCanvas = bool;
}
@Override
public void stateChange(int state, String msg) {
if (mState != state) {
mTime = 0;
}
mState = state;
this.mMsg = msg;
}
@Override
public int getState() {
return mState;
}
@Override
public boolean draw(Canvas canvas, int left, int top, int right, int bottom) {
boolean more = false;
final int width = right - left;
final int height = mHeight;
final int offset = bottom - top;
canvas.save();
if (isClipCanvas) {
canvas.clipRect(left + 5, 1, right + 5, bottom - 1);
}
switch (mState) {
case STATE_REST:
break;
case STATE_PULL:
case STATE_RELEASE:
if (offset < 10) {
break;
}
mPaint.setColor(mPointColor);
for (int i = 0; i < mPice; i++) {
int angleParam;
if (offset < height * 3 / 4) {
angleParam = offset * 16 / height - 3;// 每1%转0.16度;
} else {
angleParam = offset * 300 / height - 217;// 每1%转3度;
}
float angle = -(i * (360 / mPice) - angleParam) * PI / 180;
float radiusParam;
if (offset <= height) {
radiusParam = offset / (float) height;
radiusParam = 1 - radiusParam;
radiusParam *= radiusParam;
radiusParam = 1 - radiusParam;
} else {
radiusParam = 1;
}
float radius = width / 2 - radiusParam * (width / 2 - mCircleRadius);
float x = (float) (width / 2 + radius * Math.cos(angle));
float y = (float) (offset / 2 + radius * Math.sin(angle));
canvas.drawCircle(x, y + top, mPointRadius, mPaint);
}
break;
case STATE_LOADING:
more = true;
mPaint.setColor(mPointColor);
for (int i = 0; i < mPice; i++) {
int angleParam = mTime * 5;
float angle = -(i * (360 / mPice) - angleParam) * PI / 180;
float radius = mCircleRadius;
float x = (float) (width / 2 + radius * Math.cos(angle));
float y;
if (offset < height) {
y = (float) (offset - height / 2 + radius * Math.sin(angle));
} else {
y = (float) (offset / 2 + radius * Math.sin(angle));
}
canvas.drawCircle(x, y + top, mPointRadius, mPaint);
}
mTime++;
break;
case STATE_SUCCESS:
case STATE_FAIL:
more = true;
final int time = mTime;
if (time < 30) {
mPaint.setColor(mPointColor);
for (int i = 0; i < mPice; i++) {
int angleParam = mTime * 10;
float angle = -(i * (360 / mPice) - angleParam) * PI / 180;
float radius = mCircleRadius + time * mCircleRadius;
float x = (float) (width / 2 + radius * Math.cos(angle));
float y;
if (offset < height) {
y = (float) (offset - height / 2 + radius * Math.sin(angle));
} else {
y = (float) (offset / 2 + radius * Math.sin(angle));
}
canvas.drawCircle(x, y + top, mPointRadius, mPaint);
}
mPaint.setColor(mTextColor);
mPaint.setAlpha(time * 255 / 30);
String text = mMsg != null ? mMsg : mState == STATE_SUCCESS ? "加载成功" : "加载失败";
float y;
if (offset < height) {
y = offset - height / 2;
} else {
y = offset / 2;
}
canvas.drawText(text, width / 2, y + top + mFontOffset, mPaint);
} else {
mPaint.setColor(mTextColor);
String text = mMsg != null ? mMsg : mState == STATE_SUCCESS ? "加载成功" : "加载失败";
float y;
if (offset < height) {
y = offset - height / 2;
mPaint.setAlpha(offset * 255 / height);
} else {
y = offset / 2;
}
canvas.drawText(text, width / 2, y + top + mFontOffset, mPaint);
}
mTime++;
break;
}
canvas.restore();
return more;
}
@Override
public void toastResultInOtherWay(Context context, int state) {
if (state == Headable.STATE_SUCCESS) {
} else if (state == Headable.STATE_FAIL) {
Toast.makeText(context, mMsg != null ? mMsg : "加载失败", Toast.LENGTH_SHORT).show();
}
}
@Override
public int getHeight() {
return mHeight;
}
}
