Android Open Source - vlcamera Draggable Text

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Back to project page vlcamera.

License

The source code is released under:

Apache License

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Java Source Code

package com.ktmt.vlcamera.model;
/* w  ww .  jav  a  2 s  . c  o  m*/
import com.ktmt.vlcamera.common.vlCameraConstant;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;

public class DraggableText extends DraggableBitmap {
  private String mText;
  private int mStartX;
  private int mStartY;
  private int mTextSize;
  private Paint mPaint;
   
  public DraggableText(Bitmap b, String text, int color) {
    super(b);
    mText = text;
    mTextSize = (vlCameraConstant.TEXT_BITMAP_SIZE * vlCameraConstant.TEXT_BITMAP_SCALE);

    mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mPaint.setColor(color);
    mPaint.setTextSize(mTextSize);
    mPaint.setTypeface(vlCameraConstant.TEXT_BITMAP_FONT);

    int[] size = calculateBitmapsize(text);
    int height = size[1];
    int width = size[0];

    mStartX = 10;
    mStartY = height / 2;
    mBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(mBitmap);

    drawTextByLine(canvas, mPaint, text);

  }

  public String getText() {
    return mText;
  }

  public void setText(String mText) {
    this.mText = mText;
  }

  /* util stuffs */
  private int[] calculateBitmapsize(String text) {
    int[] ret = new int[2];

    String[] lines = text.split("\\n+");
    int height = lines.length * (mTextSize + vlCameraConstant.TEXT_BITMAP_LINEMARGIN);
    int width = 0;
    for (String line : lines) {
      int measureWidth = (int) mPaint.measureText(line)
          + vlCameraConstant.TEXT_BITMAP_LINEMARGIN;
      width = measureWidth > width ? measureWidth : width;
    }
    ret[0] = width;
    ret[1] = height;
    return ret;
  }

  private void drawTextByLine(Canvas canvas, Paint paint, String text) {
    String[] lines = text.split("\\n+");
    canvas.drawText(lines[0], mStartX, mStartY, paint);
    float nextLine = 0;
    for (int count = 0; count < lines.length; count++) {
      if (count == 0)
        continue;
      nextLine = count * vlCameraConstant.TEXT_BITMAP_LINEMARGIN + mTextSize;
      canvas.drawText(lines[count], mStartX, mStartY + nextLine, paint);
    }
    return;
  }

}

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