Android Open Source - VerticalTextView Vertical Text View

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License

The source code is released under:

MIT License

Java Source Code

package com.leaf.verticaltextview.widget;
//from  w w  w . j  a v  a2s.c o m
import android.content.Context;
import android.util.AttributeSet;
import android.widget.TextView;

/**
 * TextView for vertical character<br>.
 * 
 * Attribute "layout_height" is not supported in layout.xml and you have to set height in java by method setHeight(int pixels)
 * 
 * @author Pumpkin Leaf 
 * @version 1.0.0
 * */
public class VerticalTextView extends TextView {

  char[][] matrix;
  String columnSpacing = " ";
  int height;

  public VerticalTextView(Context context) {
    super(context);
    // TODO Auto-generated constructor stub
  }

  public VerticalTextView(Context context, AttributeSet attrs) {
    super(context, attrs);
    // TODO Auto-generated constructor stub
  }

  public VerticalTextView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    // TODO Auto-generated constructor stub
  }

  @Override
  public void setText(CharSequence text, BufferType type) {
    // TODO Auto-generated method stub
    super.setText(text, type);
  }

  public void setColumnSpacing(int columnSpacing) {
    for (int i = 1; i < columnSpacing; i++) {
      this.columnSpacing += " ";
    }
  }

  public void setVerticalText(CharSequence text, boolean rightToLeft) {
    int row;
    int column;
    int[] rowAndColumn = new int[2];
    String verticalText;

    rowAndColumn = measureMatrix(text.toString());
    row = rowAndColumn[0];
    column = rowAndColumn[1];

    setMatrix(text.toString(), row, column, rightToLeft);

    verticalText = verticalTextString(row, column);

    this.setText(verticalText);

  }

  private int[] measureMatrix(String text) {
            
    int textLength = text.length();
    int height = this.getMinHeight();
    int paddingTop = this.getPaddingTop();
    int paddingBottom = this.getPaddingBottom();
    double lineSpacingMultiplier = this.getLineSpacingMultiplier();
    double textSize = this.getTextSize();

    int row;
    int column;

    row = (int) ((height - paddingTop - paddingBottom) / (lineSpacingMultiplier + textSize));
    column = (int) (textLength / row) + 1;

    for (int i = 0; i < textLength; i++) {
      if (text.charAt(i) == '\n') {
        column++;
      }
    }
    int result[] = new int[2];

    result[0] = row;
    result[1] = column;
    return result;
  }

  private void setMatrix(String text, int row, int column, boolean rightToLeft) {
    matrix = new char[row][column];

    int x, y;
    x = 0;
    y = 0;

    if (!rightToLeft) {
      for (int i = 0; i < text.length(); i++) {
        if (text.charAt(i) != '\n') {
          matrix[x][y] = text.charAt(i);
          x++;
          if (x == row - 1) {
            y++;
            x = 0;
          }
        } else {
          y++;
          x = 0;
        }
      }

    } else {
      x = 0;
      y = column - 1;
      for (int i = 0; i < text.length(); i++) {
        if (text.charAt(i) != '\n') {
          matrix[x][y] = text.charAt(i);
          x++;
          if (x == row) {
            y--;
            x = 0;
          }
        } else {
          y--;
          x = 0;
        }
      }
    }

  }

  private String verticalTextString(int row, int column) {
    String str = "";
    int x, y;
    int columnStartPoint;
    int columnEndPoint;

    x = 0;
    y = 0;
    columnStartPoint = 0;
    columnEndPoint = column;
    //
    while (y < column) {
      if (matrix[x][y] == '\0') {
        x++;
        if (x == row) {
          columnStartPoint++;
          x = 0;
          y++;
        }
      } else
        break;
    }

    x = 0;
    y = column - 1;
    //
    while (y >= columnStartPoint) {
      if (matrix[x][y] == '\0') {
        x++;
        if (x == row) {
          columnEndPoint--;
          x = 0;
          y--;
        }
      } else
        break;
    }

    x = 0;
    y = columnStartPoint;
    while (x < row) {
      if (matrix[x][y] != '\0') {
        str += matrix[x][y] + columnSpacing;
        y++;
        if (y == columnEndPoint) {
          y = columnStartPoint;
          x++;
          str += "\n";
        }
      } else {
        y++;
        if (y == columnEndPoint) {
          y = columnStartPoint;
          x++;
          str += "\n";
        } else
          str += "    " + columnSpacing;
      }
    }
    
    return str;
  }

}

Java Source Code List

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