app/src/main/java/com/libraprogramming/myapplication/control/MyControl.java - master - Libra/my-application

app/src/main/java/com/libraprogramming/myapplication/control/MyControl.java
101 строка4 KB
Толмачёв Владимир Викторович
Next commit
20 ноя 2025, 19:49
20 ноя 2025, 19:490db7810
package com.libraprogramming.myapplication.control;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.text.Layout;
import android.text.StaticLayout;
import android.text.TextPaint;
import android.util.AttributeSet;
import android.view.View;
import androidx.annotation.NonNull;

public class MyControl extends View {
    private TextPaint paint;
    private StaticLayout layout;

    public MyControl(Context context) {
        super(context);
        initView();
    }

    public MyControl(Context context, AttributeSet attrs) {
        super(context, attrs);
        initView();
    }

    private void initView() {
        paint = new TextPaint();

        paint.setAntiAlias(true);
        paint.setTextAlign(Paint.Align.CENTER);
        paint.setTextSize(14.0f * getResources().getDisplayMetrics().density);
        paint.setColor(Color.BLACK);

        final var width = paint.measureText("");
        layout = StaticLayout.Builder.obtain("", 0, "".length(), paint, (int) width)
                .setAlignment(Layout.Alignment.ALIGN_NORMAL)
                .setLineSpacing(1.0f, 0)
                .setIncludePad(false)
                .build();
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // Tell the parent layout how big this view would like to be
        // but still respect any requirements (measure specs) that are passed down.

        // determine the width
        int width;
        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int widthRequirement = MeasureSpec.getSize(widthMeasureSpec);
        if (widthMode == MeasureSpec.EXACTLY) {
            width = widthRequirement;
        } else {
            width = layout.getWidth() + getPaddingLeft() + getPaddingRight();
            if (widthMode == MeasureSpec.AT_MOST) {
                if (width > widthRequirement) {
                    width = widthRequirement;
                    // too long for a single line so relayout as multiline
                    layout = StaticLayout.Builder.obtain("", 0, "".length(), paint, width)
                            .setAlignment(Layout.Alignment.ALIGN_NORMAL)
                            .setLineSpacing(1.0f, 0)
                            .setIncludePad(false)
                            .build();
//                    layout = new StaticLayout(mText, mTextPaint, width, Layout.Alignment.ALIGN_NORMAL, 1.0f, 0, false);
                }
            }
        }

        // determine the height
        int height;
        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        int heightRequirement = MeasureSpec.getSize(heightMeasureSpec);
        if (heightMode == MeasureSpec.EXACTLY) {
            height = heightRequirement;
        } else {
            height = layout.getHeight() + getPaddingTop() + getPaddingBottom();
            if (heightMode == MeasureSpec.AT_MOST) {
                height = Math.min(height, heightRequirement);
            }
        }

        // Required call: set width and height
        setMeasuredDimension(width, height);
    }

    @Override
    protected void onDraw(@NonNull Canvas canvas) {
        super.onDraw(canvas);
        // do as little as possible inside onDraw to improve performance

        // draw the text on the canvas after adjusting for padding
        canvas.save();
        canvas.translate(getPaddingLeft(), getPaddingTop());
//        canvas.drawPaint(paint);
        layout.draw(canvas);
        canvas.restore();
    }
}