116 lines
3.8 KiB
Java
116 lines
3.8 KiB
Java
package com.affectiva.affdexme;
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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.Color;
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import android.graphics.Paint;
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import android.graphics.Typeface;
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import android.util.AttributeSet;
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import android.view.View;
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import java.lang.Math;
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/**
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* The MetricView class is used to display metric scores on top of colored bars whose color depend on the score.
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*/
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public class MetricView extends View {
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float midX = 0; //coordinates of the center of the view
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float midY = 0;
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float halfWidth = 50;//default width and height of view
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float height = 10;
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String text = ""; //score in text format
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Paint textPaint;
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Paint boxPaint;
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float left = 0; //colored bar is drawn using left,right,top, and height variables
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float right = 0;
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float top = 0;
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float textBottom = 0; //tells our view where to draw the baseline of the font
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public MetricView(Context context) {
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super(context);
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initResources(context,null);
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}
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public MetricView(Context context, AttributeSet attrs) {
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super(context,attrs);
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initResources(context,attrs);
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}
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public MetricView(Context context, AttributeSet attrs, int styleID){
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super(context, attrs, styleID);
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initResources(context,attrs);
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}
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void initResources(Context context, AttributeSet attrs) {
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boxPaint = new Paint();
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boxPaint.setColor(Color.GREEN);
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textPaint = new Paint();
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textPaint.setStyle(Paint.Style.FILL);
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textPaint.setTextAlign(Paint.Align.CENTER);
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int textSize = 15; //default text size value
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//load and parse XML attributes
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if (attrs != null) {
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TypedArray a = getContext().obtainStyledAttributes(attrs,R.styleable.custom_attributes,0,0);
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textPaint.setColor(a.getColor(R.styleable.custom_attributes_textColor, Color.BLACK));
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textSize = a.getDimensionPixelSize(R.styleable.custom_attributes_textSize, textSize);
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textPaint.setTextSize(textSize);
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halfWidth = a.getDimensionPixelSize(R.styleable.custom_attributes_barLength,100)/2;
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a.recycle();
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} else {
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textPaint.setColor(Color.BLACK);
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textPaint.setTextSize(textSize);
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}
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/**
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* We set the desired height of the view to be as large as our text.
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* We also offset the bottom line at which our text is drawn, to give the appearance
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* that the text is centered vertically.
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*/
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height = textSize;
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textBottom = height - 5;
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}
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public void setTypeface(Typeface face) {
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textPaint.setTypeface(face);
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}
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public void setScore(float s){
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text = String.format("%.0f%%", s); //change the text of the view
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left = midX - (halfWidth * (s / 100)); //change the coordinates at which the colored bar will be drawn
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right = midX + (halfWidth * (s / 100));
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invalidate(); //instruct Android to re-draw our view, now that the text has changed
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}
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/**
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* set our view to be the minimum of the sizes that Android will allow and our desired sizes
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* **/
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@Override
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protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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setMeasuredDimension((int)Math.min(MeasureSpec.getSize(widthMeasureSpec), halfWidth *2), (int)Math.min(MeasureSpec.getSize(heightMeasureSpec),height));
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}
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@Override
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protected void onSizeChanged(int w, int h, int oldW, int oldH) {
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super.onSizeChanged(w,h,oldW,oldH);
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midX = w/2;
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midY = h/2;
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}
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@Override
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protected void onDraw(Canvas canvas) {
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super.onDraw(canvas);
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//draws the colored bar that appears behind our score
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canvas.drawRect(left,top,right,height, boxPaint);
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//draws the score
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canvas.drawText(text,midX , textBottom, textPaint);
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}
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}
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