Class BasicTextImage

java.lang.Object
com.googlecode.lanterna.graphics.BasicTextImage
All Implemented Interfaces:
Scrollable, TextImage
public class BasicTextImage extends Object implements TextImage
Simple implementation of TextImage that keeps the content as a two-dimensional TextCharacter array. Copy operations between two BasicTextImage classes are semi-optimized by using System.arraycopy instead of iterating over each character and copying them over one by one.

  • Field Details

  • Constructor Details

    • BasicTextImage

      public BasicTextImage(int columns, int rows)
      Creates a new BasicTextImage with the specified size and fills it initially with space characters using the default foreground and background color
      Parameters:
      columns - Size of the image in number of columns
      rows - Size of the image in number of rows

    • BasicTextImage

      public BasicTextImage(TerminalSize size)
      Creates a new BasicTextImage with the specified size and fills it initially with space characters using the default foreground and background color
      Parameters:
      size - Size to make the image

    • BasicTextImage

      public BasicTextImage(TerminalSize size, TextCharacter initialContent)
      Creates a new BasicTextImage with a given size and a TextCharacter to initially fill it with
      Parameters:
      size - Size of the image
      initialContent - What character to set as the initial content

    • BasicTextImage

      private BasicTextImage(TerminalSize size, TextCharacter[][] toCopy, TextCharacter initialContent)
      Creates a new BasicTextImage by copying a region of a two-dimensional array of TextCharacter:s. If the area to be copied to larger than the source array, a filler character is used.
      Parameters:
      size - Size to create the new BasicTextImage as (and size to copy from the array)
      toCopy - Array to copy initial data from
      initialContent - Filler character to use if the source array is smaller than the requested size

  • Method Details

    • getSize

      public TerminalSize getSize()
      Description copied from interface: TextImage
      Returns the dimensions of this TextImage, in columns and rows
      Specified by:
      getSize in interface TextImage
      Returns:
      Size of this TextImage

    • setAll

      public void setAll(TextCharacter character)
      Description copied from interface: TextImage
      Sets the text image content to one specified character (including color and style)
      Specified by:
      setAll in interface TextImage
      Parameters:
      character - The character to fill the image with

    • resize

      public BasicTextImage resize(TerminalSize newSize, TextCharacter filler)
      Description copied from interface: TextImage
      Returns a copy of this image resized to a new size and using a specified filler character if the new size is larger than the old and we need to fill in empty areas. The copy will be independent from the one this method is invoked on, so modifying one will not affect the other.
      Specified by:
      resize in interface TextImage
      Parameters:
      newSize - Size of the new image
      filler - Filler character to use on the new areas when enlarging the image (is not used when shrinking)
      Returns:
      Copy of this image, but resized

    • setCharacterAt

      public void setCharacterAt(TerminalPosition position, TextCharacter character)
      Description copied from interface: TextImage
      Sets the character at a specific position in the image to a particular TextCharacter. If the position is outside of the image's size, this method does nothing.
      Specified by:
      setCharacterAt in interface TextImage
      Parameters:
      position - Coordinates of the character
      character - What TextCharacter to assign at the specified position

    • setCharacterAt

      public void setCharacterAt(int column, int row, TextCharacter character)
      Description copied from interface: TextImage
      Sets the character at a specific position in the image to a particular TextCharacter. If the position is outside of the image's size, this method does nothing.
      Specified by:
      setCharacterAt in interface TextImage
      Parameters:
      column - Column coordinate of the character
      row - Row coordinate of the character
      character - What TextCharacter to assign at the specified position

    • getCharacterAt

      public TextCharacter getCharacterAt(TerminalPosition position)
      Description copied from interface: TextImage
      Returns the character stored at a particular position in this image
      Specified by:
      getCharacterAt in interface TextImage
      Parameters:
      position - Coordinates of the character
      Returns:
      TextCharacter stored at the specified position

    • getCharacterAt

      public TextCharacter getCharacterAt(int column, int row)
      Description copied from interface: TextImage
      Returns the character stored at a particular position in this image
      Specified by:
      getCharacterAt in interface TextImage
      Parameters:
      column - Column coordinate of the character
      row - Row coordinate of the character
      Returns:
      TextCharacter stored at the specified position

    • copyTo

      public void copyTo(TextImage destination)
      Description copied from interface: TextImage
      Copies this TextImage's content to another TextImage. If the destination TextImage is larger than this ScreenBuffer, the areas outside of the area that is written to will be untouched.
      Specified by:
      copyTo in interface TextImage
      Parameters:
      destination - TextImage to copy to

    • copyTo

      public void copyTo(TextImage destination, int startRowIndex, int rows, int startColumnIndex, int columns, int destinationRowOffset, int destinationColumnOffset)
      Description copied from interface: TextImage
      Copies this TextImage's content to another TextImage. If the destination TextImage is larger than this TextImage, the areas outside of the area that is written to will be untouched.
      Specified by:
      copyTo in interface TextImage
      Parameters:
      destination - TextImage to copy to
      startRowIndex - Which row in this image to copy from
      rows - How many rows to copy
      startColumnIndex - Which column in this image to copy from
      columns - How many columns to copy
      destinationRowOffset - Offset (in number of rows) in the target image where we want to first copied row to be
      destinationColumnOffset - Offset (in number of columns) in the target image where we want to first copied column to be

    • newTextGraphics

      public TextGraphics newTextGraphics()
      Description copied from interface: TextImage
      Creates a TextGraphics object that targets this TextImage for all its drawing operations.
      Specified by:
      newTextGraphics in interface TextImage
      Returns:
      TextGraphics object for this TextImage

    • newBlankLine

      private TextCharacter[] newBlankLine()

    • scrollLines

      public void scrollLines(int firstLine, int lastLine, int distance)
      Description copied from interface: TextImage
      Scroll a range of lines of this TextImage according to given distance. TextImage implementations of this method do not throw IOException.
      Specified by:
      scrollLines in interface Scrollable
      Specified by:
      scrollLines in interface TextImage
      Parameters:
      firstLine - first line of the range to be scrolled (top line is 0)
      lastLine - last (inclusive) line of the range to be scrolled
      distance - if > 0: move lines up, else if < 0: move lines down.

    • toString

      public String toString()
      Overrides:
      toString in class Object