Add a pitch view widget

Julien LepillerThu Jun 11 04:21:54+0200 2020

9ca7f50

Add a pitch view widget

app/src/main/java/eu/lepiller/nani/PitchView.java unknown status 1

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package eu.lepiller.nani;
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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.util.AttributeSet;
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import android.util.Log;
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import android.util.Pair;
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import android.view.View;
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import android.widget.TextView;
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import androidx.annotation.Nullable;
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import java.util.ArrayList;
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public class PitchView extends View {
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    private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
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    private int textColor = Color.BLACK;
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    private int pitchColor = Color.BLACK;
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    private ArrayList<Pair<String, Boolean>> pitchedMora = new ArrayList<>();
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    private int accent;
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    private String text;
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    private float textSize = 32;
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    private static final String TAG = "PITCHVIEW";
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    public PitchView(Context context) {
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        super(context);
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        setDefaults();
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    }
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    public PitchView(Context context, @Nullable AttributeSet attrs) {
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        super(context, attrs);
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        setDefaults();
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        setupAttributes(attrs, 0);
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    }
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    public PitchView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
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        super(context, attrs, defStyleAttr);
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        setDefaults();
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        setupAttributes(attrs, defStyleAttr);
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    }
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    private void setDefaults() {
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        textColor = getContext().getResources().getColor(android.R.color.tab_indicator_text);
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        pitchColor = getContext().getResources().getColor(android.R.color.background_dark);
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        textSize = new TextView(getContext()).getTextSize();
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    }
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    private void setupAttributes(AttributeSet attrs, int defStyleAttr) {
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        TypedArray typedArray = getContext().getTheme().obtainStyledAttributes(attrs, R.styleable.PitchView, defStyleAttr, 0);
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        textColor = typedArray.getColor(R.styleable.PitchView_textColor, textColor);
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        pitchColor = typedArray.getColor(R.styleable.PitchView_pitchColor, pitchColor);
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        textSize = typedArray.getDimension(R.styleable.PitchView_textSize, textSize);
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        text = typedArray.getString(R.styleable.PitchView_text);
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        accent = typedArray.getInt(R.styleable.PitchView_pitch, -1);
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        updatePitchedMora();
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    }
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    private static boolean is_mora(char c) {
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        ArrayList<Character> not_mora = new ArrayList<>();
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        not_mora.add("???".charAt(0));
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        not_mora.add("???".charAt(0));
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        not_mora.add("???".charAt(0));
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        not_mora.add("???".charAt(0));
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        not_mora.add("???".charAt(0));
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        not_mora.add("???".charAt(0));
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        return !not_mora.contains(c);
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    }
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    public void setText(String text) {
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        this.text = text;
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        updatePitchedMora();
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        notify();
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    }
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    public void setPitch(int pitch) {
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        this.accent = pitch;
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        updatePitchedMora();
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        notify();
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    }
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    public String getText() {
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        return text;
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    }
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    public int getPitch() {
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        return accent;
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    }
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    private void updatePitchedMora() {
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        ArrayList<String> moras = new ArrayList<>();
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        if(accent < 0 || text == null)
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            return;
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        for(int i=0; i<text.length(); i++) {
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            char here = text.charAt(i);
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            if(is_mora(here) && (i == text.length()-1 || is_mora(text.charAt(i+1))))
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                moras.add(text.substring(i,i+1));
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            else if(is_mora(here))
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                moras.add(text.substring(i,i+2));
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        }
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        moras.add(null);
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        pitchedMora = new ArrayList<>();
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        if(accent == 0)
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            setHeiban(pitchedMora, moras);
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        else if(accent == 1)
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            setAtamadaka(pitchedMora, moras);
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        else
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            setOtherAccent(pitchedMora, moras, accent);
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    }
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    public void setTextColor(int textColor) {
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        this.textColor = textColor;
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    }
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    public void setPitchColor(int pitchColor) {
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        this.pitchColor = pitchColor;
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    }
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    public void setTextSize(float textSize) {
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        this.textSize = textSize;
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        notify();
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    }
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    private static float getCharWidth(float textSize) {
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        return (float)2.25 * textSize;
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    }
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    private static float getPitchRadius(float textSize) {
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        return textSize / 3;
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    }
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    private static float getStrokeWidth(float textSize) {
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        return getPitchRadius(textSize) / 2;
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    }
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    private static float getParticleRadius(float textSize) {
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        return 2 * getPitchRadius(textSize) / 3;
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    }
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    private static float getLowPosition(float textSize) {
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        return 2 * textSize + getParticleRadius(textSize);
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    }
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    private static float getHighPosition(float textSize) {
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        return getPitchRadius(textSize) + getParticleRadius(textSize);
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    }
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    private static float getMoraPosition(float textSize) {
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        return (float)3.5 * textSize + getParticleRadius(textSize);
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    }
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    private static void setHeiban(ArrayList<Pair<String, Boolean>> text, ArrayList<String> moras) {
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        text.add(new Pair<>(moras.get(0), false));
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        for(int i=1; i<moras.size(); i++) {
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            text.add(new Pair<>(moras.get(i), true));
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        }
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    }
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    private static void setAtamadaka(ArrayList<Pair<String, Boolean>> text, ArrayList<String> moras) {
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        text.add(new Pair<>(moras.get(0), true));
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        for(int i=1; i<moras.size(); i++) {
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            text.add(new Pair<>(moras.get(i), false));
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        }
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    }
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    private static void setOtherAccent(ArrayList<Pair<String, Boolean>> text, ArrayList<String> moras, int accent) {
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        text.add(new Pair<>(moras.get(0), false));
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        int i;
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        for(i=1; i<moras.size() && i < accent; i++) {
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            text.add(new Pair<>(moras.get(i), true));
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        }
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        for(; i<moras.size(); i++) {
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            text.add(new Pair<>(moras.get(i), false));
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        }
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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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        if(pitchedMora == null || pitchedMora.size() == 0)
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            return;
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        paint.setStrokeWidth(getParticleRadius(textSize));
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        paint.setTextSize(textSize);
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        boolean previous = true;
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        for(int i = 0; i< pitchedMora.size(); i++) {
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            paint.setColor(pitchColor);
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            Pair<String, Boolean> mora = pitchedMora.get(i);
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            paint.setStyle(mora.first==null? Paint.Style.STROKE: Paint.Style.FILL_AND_STROKE);
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            float x = getX(i, textSize);
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            float y = getY(mora.second, textSize);
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            canvas.drawCircle(x, y, getPitchRadius(textSize), paint);
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            if(i>0) {
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                paint.setStyle(Paint.Style.STROKE);
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                paint.setStrokeWidth(getStrokeWidth(textSize));
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                double radius = getPitchRadius(textSize) + getParticleRadius(textSize)/2;
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                drawLine(canvas, paint, i-1, previous, mora.second, radius, textSize);
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                paint.setStrokeWidth(getParticleRadius(textSize));
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            }
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            if(mora.first != null) {
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                paint.setColor(textColor);
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                float width = paint.measureText(mora.first);
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                paint.setStyle(Paint.Style.FILL);
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                canvas.drawText(mora.first, x - width/2, getMoraPosition(textSize), paint);
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            }
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            previous = mora.second;
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        }
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    }
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    private static void drawLine(Canvas canvas, Paint paint, int position, boolean a, boolean b, double radius, float textSize) {
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        float startX = getX(position, textSize);
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        float startY = getY(a, textSize);
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        float endX = getX(position + 1, textSize);
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        float endY = getY(b, textSize);
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        if(a == b) {
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            startX += radius;
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            endX -= radius;
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        } else {
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            double dist = Math.sqrt(Math.pow(startX-endX, 2)+Math.pow(startY-endY, 2));
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            startY += (endY - startY) * radius / dist;
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            startX += (endX - startX) * radius / dist;
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            endX -= (endX - startX) * radius / dist;
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            endY -= (endY - startY) * radius / dist;
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        }
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        canvas.drawLine(startX, startY, endX, endY, paint);
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    }
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    private static float getX(int i, float textSize) {
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        return i*getCharWidth(textSize) + getCharWidth(textSize)/2;
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    }
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    private static float getY(boolean high, float textSize) {
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        return high? getHighPosition(textSize): getLowPosition(textSize);
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    }
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    @Override
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    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
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        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
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        if(pitchedMora != null)
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           setMeasuredDimension((int)getX(pitchedMora.size(), textSize), (int)(getMoraPosition(textSize) + textSize/2));
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        else
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            setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
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    }
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}
app/src/main/res/values/attrs.xml unknown status 1
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<?xml version="1.0" encoding="utf-8"?>
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<resources></resources>
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03<
\ No newline at end of file