package com.lid.lib;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
public class LabelViewHelper {
private static final int LEFT_TOP = 1;
private static final int RIGHT_TOP = 2;
private static final int LEFT_BOTTOM = 3;
private static final int RIGHT_BOTTOM = 4;
private static final int DEFAULT_DISTANCE = 40;
private static final int DEFAULT_HEIGHT = 20;
private static final int DEFAULT_STROKE_WIDTH = 1;
private static final int DEFAULT_TEXT_SIZE = 14;
private static final int DEFAULT_BACKGROUND_COLOR = 0x9F27CDC0;
private static final int DEFAULT_STROKE_COLOR = 0xFFFFFFFF;
private static final int DEFAULT_TEXT_COLOR = 0xFFFFFFFF;
private static final int DEFAULT_ORIENTATION = LEFT_TOP;
private static final int DEFAULT_TEXT_STYLE = 0;
private int distance;
private int height;
private int strokeWidth;
private String text;
private int backgroundColor;
private int strokeColor;
private int textSize;
private int textStyle;
private int textColor;
private boolean visual;
private int orientation;
// private float startPosX;
// private float startPosY;
// private float endPosX;
// private float endPosY;
private Paint rectPaint;
private Paint rectStrokePaint;
// simulator
private Path rectPath;
private Path textPath;
private Paint textPaint;
private Rect textBound;
private Context context;
private int alpha;
public LabelViewHelper(Context context, AttributeSet attrs, int defStyleAttr) {
this.context = context;
TypedArray attributes = context.obtainStyledAttributes(attrs, R.styleable.LabelView, defStyleAttr, 0);
distance = attributes.getDimensionPixelSize(R.styleable.LabelView_label_distance, dip2Px(DEFAULT_DISTANCE));
height = attributes.getDimensionPixelSize(R.styleable.LabelView_label_height, dip2Px(DEFAULT_HEIGHT));
strokeWidth = attributes.getDimensionPixelSize(R.styleable.LabelView_label_strokeWidth, dip2Px(DEFAULT_STROKE_WIDTH));
text = attributes.getString(R.styleable.LabelView_label_text);
backgroundColor = attributes.getColor(R.styleable.LabelView_label_backgroundColor, DEFAULT_BACKGROUND_COLOR);
strokeColor = attributes.getColor(R.styleable.LabelView_label_strokeColor, DEFAULT_STROKE_COLOR);
textSize = attributes.getDimensionPixelSize(R.styleable.LabelView_label_textSize, dip2Px(DEFAULT_TEXT_SIZE));
textStyle = attributes.getInt(R.styleable.LabelView_label_textStyle, DEFAULT_TEXT_STYLE);
textColor = attributes.getColor(R.styleable.LabelView_label_textColor, DEFAULT_TEXT_COLOR);
visual = attributes.getBoolean(R.styleable.LabelView_label_visual, true);
orientation = attributes.getInteger(R.styleable.LabelView_label_orientation, DEFAULT_ORIENTATION);
attributes.recycle();
rectPaint = new Paint();
rectPaint.setDither(true);
rectPaint.setAntiAlias(true);
rectPaint.setStyle(Paint.Style.FILL);
rectStrokePaint = new Paint();
rectStrokePaint.setDither(true);
rectStrokePaint.setAntiAlias(true);
rectStrokePaint.setStyle(Paint.Style.STROKE);
rectPath = new Path();
rectPath.reset();
textPath = new Path();
textPath.reset();
textPaint = new Paint();
textPaint.setDither(true);
textPaint.setAntiAlias(true);
textPaint.setStrokeJoin(Paint.Join.ROUND);
textPaint.setStrokeCap(Paint.Cap.SQUARE);
textBound = new Rect();
}
public void onDraw(Canvas canvas, int measuredWidth, int measuredHeight) {
if (!visual || text == null) {
return;
}
float actualDistance = distance + height / 2;
calcOffset(measuredWidth, measuredHeight);
rectPaint.setColor(backgroundColor);
if (alpha != 0) {
rectPaint.setAlpha(alpha);
}
rectStrokePaint.setColor(strokeColor);
rectStrokePaint.setStrokeWidth(strokeWidth);
canvas.drawPath(rectPath, rectPaint);
canvas.drawPath(rectPath, rectStrokePaint);
textPaint.setTextSize(textSize);
textPaint.setColor(textColor);
textPaint.getTextBounds(text, 0, text.length(), textBound);
textPaint.setTypeface(Typeface.defaultFromStyle(textStyle));
float begin_w_offset = (1.4142135f * actualDistance) / 2 - textBound.width() / 2;
if (begin_w_offset < 0) begin_w_offset = 0;
canvas.drawTextOnPath(text, textPath, begin_w_offset, textBound.height() / 2, textPaint);
}
private void calcOffset(int measuredWidth, int measuredHeight) {
float startPosX = measuredWidth - distance - height;
float endPosX = measuredWidth;
float startPosY = measuredHeight - distance - height;
float endPosY = measuredHeight;
float middle = height/2;
switch (orientation) {
case 1: // LEFT_TOP
rectPath.reset();
rectPath.moveTo(0, distance);
rectPath.lineTo(distance, 0);
rectPath.lineTo(distance + height, 0);
rectPath.lineTo(0, distance + height);
rectPath.close();
textPath.reset();
textPath.moveTo(0, distance + middle);
textPath.lineTo(distance + middle, 0);
textPath.close();
break;
case 2: // RIGHT_TOP
rectPath.reset();
rectPath.moveTo(startPosX, 0);
rectPath.lineTo(startPosX + height, 0);
rectPath.lineTo(endPosX, distance);
rectPath.lineTo(endPosX, distance + height);
rectPath.close();
textPath.reset();
textPath.moveTo(startPosX + middle, 0);
textPath.lineTo(endPosX, distance + middle);
textPath.close();
break;
case 3: // LEFT_BOTTOM
rectPath.reset();
rectPath.moveTo(0, startPosY);
rectPath.lineTo(distance + height, endPosY);
rectPath.lineTo(distance, endPosY);
rectPath.lineTo(0, startPosY + height);
rectPath.close();
textPath.reset();
textPath.moveTo(0, startPosY + middle);
textPath.lineTo(distance + middle, endPosY);
textPath.close();
break;
case 4: // RIGHT_BOTTOM
rectPath.reset();
rectPath.moveTo(startPosX, endPosY);
rectPath.lineTo(measuredWidth, startPosY);
rectPath.lineTo(measuredWidth, startPosY + height);
rectPath.lineTo(startPosX + height, endPosY);
rectPath.close();
textPath.reset();
textPath.moveTo(startPosX + middle, endPosY);
textPath.lineTo(endPosX, startPosY + middle);
textPath.close();
break;
}
}
private int dip2Px(float dip) {
return (int) (dip * context.getResources().getDisplayMetrics().density + 0.5f);
}
private int px2Dip(float px) {
return (int) (px / context.getResources().getDisplayMetrics().density + 0.5f);
}
public void setLabelHeight(View view, int height) {
if (this.height != dip2Px(height)) {
this.height = dip2Px(height);
view.invalidate();
}
}
public int getLabelHeight() {
return px2Dip(this.height);
}
public void setLabelDistance(View view, int distance) {
if (this.distance != dip2Px(distance)) {
this.distance = dip2Px(distance);
view.invalidate();
}
}
public int getLabelStrokeWidth() {
return px2Dip(this.strokeWidth);
}
public void setLabelStrokeWidth(View view, int strokeWidth) {
if (this.strokeWidth != dip2Px(strokeWidth)) {
this.strokeWidth = dip2Px(strokeWidth);
view.invalidate();
}
}
public int getLabelDistance() {
return px2Dip(this.distance);
}
public boolean isLabelVisual() {
return visual;
}
public void setLabelVisual(View view, boolean visual) {
if (this.visual != visual) {
this.visual = visual;
view.invalidate();
}
}
public int getLabelOrientation() {
return orientation;
}
public void setLabelOrientation(View view, int orientation) {
if (this.orientation != orientation && orientation <= 4 && orientation >= 1) {
this.orientation = orientation;
view.invalidate();
}
}
public int getLabelTextColor() {
return textColor;
}
public void setLabelTextColor(View view, int textColor) {
if (this.textColor != textColor) {
this.textColor = textColor;
view.invalidate();
}
}
public int getLabelBackgroundColor() {
return backgroundColor;
}
public void setLabelBackgroundColor(View view, int backgroundColor) {
if (this.backgroundColor != backgroundColor) {
this.backgroundColor = backgroundColor;
view.invalidate();
}
}
public int getLabelStrokeColor() {
return strokeColor;
}
public void setLabelStrokeColor(View view, int strokeColor) {
if (this.strokeColor != strokeColor) {
this.strokeColor = strokeColor;
view.invalidate();
}
}
public void setLabelBackgroundAlpha(View view, int alpha) {
if (this.alpha != alpha) {
this.alpha = alpha;
view.invalidate();
}
}
public String getLabelText() {
return text;
}
public void setLabelText(View view, String text) {
if (this.text == null || !this.text.equals(text)) {
this.text = text;
view.invalidate();
}
}
public int getLabelTextSize() {
return px2Dip(this.textSize);
}
public void setLabelTextSize(View view, int textSize) {
if (this.textSize != textSize) {
this.textSize = textSize;
view.invalidate();
}
}
public int getLabelTextStyle(){
return textStyle;
}
public void setLabelTextStyle(View view, int textStyle){
if(this.textStyle == textStyle) return;
this.textStyle = textStyle;
view.invalidate();
}
}
