91 lines
2.9 KiB
Java
91 lines
2.9 KiB
Java
package org.mariotaku.twidere.view;
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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.Align;
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import android.graphics.Rect;
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import android.text.TextPaint;
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import android.util.AttributeSet;
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import android.view.View;
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/**
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* Created by mariotaku on 14/11/16.
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*/
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public class BadgeView extends View {
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private final TextPaint mTextPaint;
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private String mText;
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private float mTextX, mTextY;
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private Rect mTextBounds;
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public BadgeView(Context context) {
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this(context, null);
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}
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public BadgeView(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public BadgeView(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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mTextPaint = new TextPaint(TextPaint.ANTI_ALIAS_FLAG);
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final TypedArray a = context.obtainStyledAttributes(attrs,
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new int[]{android.R.attr.textColor, android.R.attr.text});
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setColor(a.getColor(0, Color.WHITE));
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setText(a.getString(1));
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a.recycle();
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mTextPaint.setTextAlign(Align.CENTER);
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mTextBounds = new Rect();
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}
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public void setColor(int color) {
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mTextPaint.setColor(color);
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invalidate();
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}
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public void setText(String text) {
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mText = text;
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updateTextPosition();
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invalidate();
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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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final int hPadding = (int) (Math.round(w * (Math.pow(2, 0.5f) - 1)) / 2);
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final int vPadding = (int) (Math.round(h * (Math.pow(2, 0.5f) - 1)) / 2);
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setPadding(hPadding, vPadding, hPadding, vPadding);
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updateTextPosition();
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invalidate();
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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 (!mTextBounds.isEmpty()) {
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canvas.drawText(mText, mTextX, mTextY, mTextPaint);
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}
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}
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private void updateTextPosition() {
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final int width = getWidth(), height = getHeight();
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if (width == 0 || height == 0) return;
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final float contentWidth = width - getPaddingLeft() - getPaddingRight();
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final float contentHeight = height - getPaddingTop() - getPaddingBottom();
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if (mText != null) {
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mTextPaint.getTextBounds(mText, 0, mText.length(), mTextBounds);
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final float scale = Math.min(contentWidth / mTextBounds.width(), contentHeight / mTextBounds.height());
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mTextPaint.setTextSize(Math.min(height / 2, mTextPaint.getTextSize() * scale));
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mTextPaint.getTextBounds(mText, 0, mText.length(), mTextBounds);
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mTextX = contentWidth / 2 + getPaddingLeft();
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mTextY = contentHeight / 2 + getPaddingTop() + mTextBounds.height() / 2;
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} else {
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mTextBounds.setEmpty();
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}
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}
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}
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