Android Open Source - ScienceQuiz Rotation Text View

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Back to project page ScienceQuiz.

License

The source code is released under:

GNU General Public License

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Java Source Code

package com.finger.sciencequiz;
//ww w.  j  a va2s.com
import android.content.Context;
import android.graphics.Canvas;
import android.util.Log;
import android.view.Gravity;
import android.widget.TextView;

public class RotationTextView extends TextView
{
    public RotationTextView (Context context)
    {
  super (context);
    }

    public RotationTextView (Context context, int[] gravity)
    {
  super (context);

  int l = gravity.length;
  for (int i = 1; i < l; i++)
  {
      if (Gravity.isVertical (gravity[i]))
      {
    vertical_grav = gravity[i];
      }
  }
    }

    protected float      rotation      = 0f;
    protected float      height;
    protected float      width;
    protected int        vertical_grav = Gravity.TOP;
    protected int[]      padding;
    protected String[]   sPadding;

    public static String LOG_TAG       = "RotationTextView";

    @Override
    public void onLayout (boolean changed, int l, int t, int r, int b)
    {
  if (changed)
  {
      calcPadding (sPadding);
      setPadding (padding);
      width = getWidth () / 2;

      switch (vertical_grav)
      {
      case Gravity.TOP:
    height = getPaddingTop ()
             + (getLineCount () * getLineHeight () / 2);
    break;
      case Gravity.CENTER_VERTICAL:
      case Gravity.CENTER:
    height = getHeight () / 2;
    break;
      case Gravity.BOTTOM:
    height = getHeight () - getPaddingBottom ()
             + (getLineCount ()
                * getLineHeight () / 2);
    break;
      }
  }
    }

    @Override
    public void onDraw (Canvas canvas)
    {
  float angle = rotation;

  // Save the current matrix
  canvas.save ();
  // Rotate this View at its center
  canvas.rotate (
      angle,
      width,
      height);
  // Draw it
  super.onDraw (canvas);
  // Restore to the previous matrix
  canvas.restore ();
    }

    public void setRot (float r)
    {
  rotation = r;
    }

    public void setPadding (String[] s)
    {
  sPadding = s;
    }

    protected void calcPadding (String[] s)
    {
  padding = new int[4];
  try
  {
      for (int i = 0; i < 4; i++)
      {
    if (s[i].charAt (0) == 37)
    {
        padding[i] = Integer.parseInt (s[i].substring (1));
        padding[i] *= getHeight () / 100;
    }
    else
    {
        padding[i] = Integer.parseInt (s[i]);
    }
      }
  }
  catch (NumberFormatException e)
  {
      Log.d (LOG_TAG, "Failed to set padding");
  }
    }

    public void setPadding (int[] p)
    {
  setPadding (p[0], p[1], p[2], p[3]);
    }
}

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