Interface TextGraphics

All Superinterfaces:
StyleSet<TextGraphics>
All Known Subinterfaces:
TextGUIGraphics, ThemedTextGraphics
All Known Implementing Classes:
AbstractTextGraphics, DefaultTextGUIGraphics, DoublePrintingTextGraphics, NullTextGraphics, ScreenTextGraphics, SubTextGraphics, TerminalTextGraphics, VirtualTerminalTextGraphics

public interface TextGraphics extends StyleSet<TextGraphics>
This interface exposes functionality to 'draw' text graphics on a section of the terminal. It has several implementation for the different levels, including one for Terminal, one for Screen and one which is used by the TextGUI system to draw components. They are all very similar and has a lot of graphics functionality in AbstractTextGraphics.

The basic concept behind a TextGraphics implementation is that it keeps a state on four things:

  • Foreground color
  • Background color
  • Modifiers
  • Tab-expanding behaviour
These call all be altered through ordinary set* methods, but some will be altered as the result of performing one of the 'drawing' operations. See the documentation to each method for further information (for example, putString).

Don't hold on to your TextGraphics objects for too long; ideally create them and let them be GC:ed when you are done with them. The reason is that not all implementations will handle the underlying terminal changing size.

  • Method Details

    • getSize

      TerminalSize getSize()
      Returns the size of the area that this text graphic can write to. Any attempts of placing characters outside of this area will be silently ignored.
      Returns:
      Size of the writable area that this TextGraphics can write too
    • newTextGraphics

      TextGraphics newTextGraphics(TerminalPosition topLeftCorner, TerminalSize size) throws IllegalArgumentException
      Creates a new TextGraphics of the same type as this one, using the same underlying subsystem. Using this method, you need to specify a section of the current TextGraphics valid area that this new TextGraphic shall be restricted to. If you call newTextGraphics(TerminalPosition.TOP_LEFT_CORNER, textGraphics.getSize()) then the resulting object will be identical to this one, but having a separated state for colors, position and modifiers.
      Parameters:
      topLeftCorner - Position of this TextGraphics's writable area that is to become the top-left corner (0x0) of the new TextGraphics
      size - How large area, counted from the topLeftCorner, the new TextGraphics can write to. This cannot be larger than the current TextGraphics's writable area (adjusted by topLeftCorner)
      Returns:
      A new TextGraphics with the same underlying subsystem, that can write to only the specified area
      Throws:
      IllegalArgumentException - If the size the of new TextGraphics exceeds the dimensions of this TextGraphics in any way.
    • getTabBehaviour

      TabBehaviour getTabBehaviour()
      Retrieves the current tab behaviour, which is what the TextGraphics will use when expanding \t characters to spaces.
      Returns:
      Current behaviour in use for expanding tab to spaces
    • setTabBehaviour

      TextGraphics setTabBehaviour(TabBehaviour tabBehaviour)
      Sets the behaviour to use when expanding tab characters (\t) to spaces
      Parameters:
      tabBehaviour - Behaviour to use when expanding tabs to spaces
      Returns:
      Itself
    • fill

      TextGraphics fill(char c)
      Fills the entire writable area with a single character, using current foreground color, background color and modifiers.
      Parameters:
      c - Character to fill the writable area with
      Returns:
      Itself
    • setCharacter

      TextGraphics setCharacter(int column, int row, char character)
      Sets the character at the current position to the specified value
      Parameters:
      column - column of the location to set the character
      row - row of the location to set the character
      character - Character to set at the current position
      Returns:
      Itself
    • setCharacter

      TextGraphics setCharacter(int column, int row, TextCharacter character)
      Sets the character at the current position to the specified value, without using the current colors and modifiers of this TextGraphics.
      Parameters:
      column - column of the location to set the character
      row - row of the location to set the character
      character - Character data to set at the current position
      Returns:
      Itself
    • setCharacter

      TextGraphics setCharacter(TerminalPosition position, char character)
      Sets the character at the current position to the specified value
      Parameters:
      position - position of the location to set the character
      character - Character to set at the current position
      Returns:
      Itself
    • setCharacter

      TextGraphics setCharacter(TerminalPosition position, TextCharacter character)
      Sets the character at the current position to the specified value, without using the current colors and modifiers of this TextGraphics.
      Parameters:
      position - position of the location to set the character
      character - Character data to set at the current position
      Returns:
      Itself
    • drawLine

      TextGraphics drawLine(TerminalPosition fromPoint, TerminalPosition toPoint, char character)
      Draws a line from a specified position to a specified position, using a supplied character. The current foreground color, background color and modifiers will be applied.
      Parameters:
      fromPoint - From where to draw the line
      toPoint - Where to draw the line
      character - Character to use for the line
      Returns:
      Itself
    • drawLine

      TextGraphics drawLine(TerminalPosition fromPoint, TerminalPosition toPoint, TextCharacter character)
      Draws a line from a specified position to a specified position, using a supplied TextCharacter. The current foreground color, background color and modifiers of this TextGraphics will not be used and will not be modified by this call.
      Parameters:
      fromPoint - From where to draw the line
      toPoint - Where to draw the line
      character - Character data to use for the line, including character, colors and modifiers
      Returns:
      Itself
    • drawLine

      TextGraphics drawLine(int fromX, int fromY, int toX, int toY, char character)
      Draws a line from a specified position to a specified position, using a supplied character. The current foreground color, background color and modifiers will be applied.
      Parameters:
      fromX - Column of the starting position to draw the line from (inclusive)
      fromY - Row of the starting position to draw the line from (inclusive)
      toX - Column of the end position to draw the line to (inclusive)
      toY - Row of the end position to draw the line to (inclusive)
      character - Character to use for the line
      Returns:
      Itself
    • drawLine

      TextGraphics drawLine(int fromX, int fromY, int toX, int toY, TextCharacter character)
      Draws a line from a specified position to a specified position, using a supplied character. The current foreground color, background color and modifiers of this TextGraphics will not be used and will not be modified by this call.
      Parameters:
      fromX - Column of the starting position to draw the line from (inclusive)
      fromY - Row of the starting position to draw the line from (inclusive)
      toX - Column of the end position to draw the line to (inclusive)
      toY - Row of the end position to draw the line to (inclusive)
      character - Character data to use for the line, including character, colors and modifiers
      Returns:
      Itself
    • drawTriangle

      TextGraphics drawTriangle(TerminalPosition p1, TerminalPosition p2, TerminalPosition p3, char character)
      Draws the outline of a triangle on the screen, using a supplied character. The triangle will begin at p1, go through p2 and then p3 and then back to p1. The current foreground color, background color and modifiers will be applied.
      Parameters:
      p1 - First point on the screen of the triangle
      p2 - Second point on the screen of the triangle
      p3 - Third point on the screen of the triangle
      character - What character to use when drawing the lines of the triangle
      Returns:
      Itself
    • drawTriangle

      Draws the outline of a triangle on the screen, using a supplied character. The triangle will begin at p1, go through p2 and then p3 and then back to p1. The current foreground color, background color and modifiers of this TextGraphics will not be used and will not be modified by this call.
      Parameters:
      p1 - First point on the screen of the triangle
      p2 - Second point on the screen of the triangle
      p3 - Third point on the screen of the triangle
      character - What character data to use when drawing the lines of the triangle
      Returns:
      Itself
    • fillTriangle

      TextGraphics fillTriangle(TerminalPosition p1, TerminalPosition p2, TerminalPosition p3, char character)
      Draws a filled triangle, using a supplied character. The triangle will begin at p1, go through p2 and then p3 and then back to p1. The current foreground color, background color and modifiers will be applied.
      Parameters:
      p1 - First point on the screen of the triangle
      p2 - Second point on the screen of the triangle
      p3 - Third point on the screen of the triangle
      character - What character to use when drawing the triangle
      Returns:
      Itself
    • fillTriangle

      Draws a filled triangle, using a supplied character. The triangle will begin at p1, go through p2 and then p3 and then back to p1. The current foreground color, background color and modifiers of this TextGraphics will not be used and will not be modified by this call.
      Parameters:
      p1 - First point on the screen of the triangle
      p2 - Second point on the screen of the triangle
      p3 - Third point on the screen of the triangle
      character - What character data to use when drawing the triangle
      Returns:
      Itself
    • drawRectangle

      TextGraphics drawRectangle(TerminalPosition topLeft, TerminalSize size, char character)
      Draws the outline of a rectangle with a particular character (and the currently active colors and modifiers). The topLeft coordinate is inclusive.

      For example, calling drawRectangle with size being the size of the terminal and top-left value being the terminal's top-left (0x0) corner will draw a border around the terminal.

      The current foreground color, background color and modifiers will be applied.

      Parameters:
      topLeft - Coordinates of the top-left position of the rectangle
      size - Size (in columns and rows) of the area to draw
      character - What character to use when drawing the outline of the rectangle
      Returns:
      Itself
    • drawRectangle

      TextGraphics drawRectangle(TerminalPosition topLeft, TerminalSize size, TextCharacter character)
      Draws the outline of a rectangle with a particular TextCharacter, ignoring the current colors and modifiers of this TextGraphics.

      For example, calling drawRectangle with size being the size of the terminal and top-left value being the terminal's top-left (0x0) corner will draw a border around the terminal.

      The current foreground color, background color and modifiers will not be modified by this call.

      Parameters:
      topLeft - Coordinates of the top-left position of the rectangle
      size - Size (in columns and rows) of the area to draw
      character - What character data to use when drawing the outline of the rectangle
      Returns:
      Itself
    • fillRectangle

      TextGraphics fillRectangle(TerminalPosition topLeft, TerminalSize size, char character)
      Takes a rectangle and fills it with a particular character (and the currently active colors and modifiers). The topLeft coordinate is inclusive.

      For example, calling fillRectangle with size being the size of the terminal and top-left value being the terminal's top-left (0x0) corner will fill the entire terminal with this character.

      The current foreground color, background color and modifiers will be applied.

      Parameters:
      topLeft - Coordinates of the top-left position of the rectangle
      size - Size (in columns and rows) of the area to draw
      character - What character to use when filling the rectangle
      Returns:
      Itself
    • fillRectangle

      TextGraphics fillRectangle(TerminalPosition topLeft, TerminalSize size, TextCharacter character)
      Takes a rectangle and fills it using a particular TextCharacter, ignoring the current colors and modifiers of this TextGraphics. The topLeft coordinate is inclusive.

      For example, calling fillRectangle with size being the size of the terminal and top-left value being the terminal's top-left (0x0) corner will fill the entire terminal with this character.

      The current foreground color, background color and modifiers will not be modified by this call.

      Parameters:
      topLeft - Coordinates of the top-left position of the rectangle
      size - Size (in columns and rows) of the area to draw
      character - What character data to use when filling the rectangle
      Returns:
      Itself
    • drawImage

      TextGraphics drawImage(TerminalPosition topLeft, TextImage image)
      Takes a TextImage and draws it on the surface this TextGraphics is targeting, given the coordinates on the target that is specifying where the top-left corner of the image should be drawn. This is equivalent of calling drawImage(topLeft, image, TerminalPosition.TOP_LEFT_CORNER, image.getSize().
      Parameters:
      topLeft - Position of the top-left corner of the image on the target
      image - Image to draw
      Returns:
      Itself
    • drawImage

      TextGraphics drawImage(TerminalPosition topLeft, TextImage image, TerminalPosition sourceImageTopLeft, TerminalSize sourceImageSize)
      Takes a TextImage and draws it on the surface this TextGraphics is targeting, given the coordinates on the target that is specifying where the top-left corner of the image should be drawn. This overload will only draw a portion of the image to the target, as specified by the two last parameters.
      Parameters:
      topLeft - Position of the top-left corner of the image on the target
      image - Image to draw
      sourceImageTopLeft - Position of the top-left corner in the source image to draw at the topLeft position on the target
      sourceImageSize - How much of the source image to draw on the target, counted from the sourceImageTopLeft position
      Returns:
      Itself
    • putString

      TextGraphics putString(int column, int row, String string)
      Puts a string on the screen at the specified position with the current colors and modifiers. If the string contains newlines (\r and/or \n), the method will stop at the character before that; you have to manage multi-line strings yourself! The current foreground color, background color and modifiers will be applied.
      Parameters:
      column - What column to put the string at
      row - What row to put the string at
      string - String to put on the screen
      Returns:
      Itself
    • putString

      TextGraphics putString(TerminalPosition position, String string)
      Shortcut to calling:
        putString(position.getColumn(), position.getRow(), string);
       
      Parameters:
      position - Position to put the string at
      string - String to put on the screen
      Returns:
      Itself
    • putString

      TextGraphics putString(int column, int row, String string, SGR extraModifier, SGR... optionalExtraModifiers)
      Puts a string on the screen at the specified position with the current colors and modifiers. If the string contains newlines (\r and/or \n), the method will stop at the character before that; you have to manage multi-line strings yourself! If you supplied any extra modifiers, they will be applied when writing the string as well but not recorded into the state of the TextGraphics object.
      Parameters:
      column - What column to put the string at
      row - What row to put the string at
      string - String to put on the screen
      extraModifier - Modifier to apply to the string
      optionalExtraModifiers - Optional extra modifiers to apply to the string
      Returns:
      Itself
    • putString

      TextGraphics putString(TerminalPosition position, String string, SGR extraModifier, SGR... optionalExtraModifiers)
      Shortcut to calling:
        putString(position.getColumn(), position.getRow(), string, modifiers, optionalExtraModifiers);
       
      Parameters:
      position - Position to put the string at
      string - String to put on the screen
      extraModifier - Modifier to apply to the string
      optionalExtraModifiers - Optional extra modifiers to apply to the string
      Returns:
      Itself
    • putString

      TextGraphics putString(int column, int row, String string, Collection<SGR> extraModifiers)
      Puts a string on the screen at the specified position with the current colors and modifiers. If the string contains newlines (\r and/or \n), the method will stop at the character before that; you have to manage multi-line strings yourself! If you supplied any extra modifiers, they will be applied when writing the string as well but not recorded into the state of the TextGraphics object.
      Parameters:
      column - What column to put the string at
      row - What row to put the string at
      string - String to put on the screen
      extraModifiers - Modifier to apply to the string
      Returns:
      Itself
    • putCSIStyledString

      TextGraphics putCSIStyledString(int column, int row, String string)
      Puts a string on the screen at the specified position with the current colors and modifiers. If the string contains newlines (\r and/or \n), the method will stop at the character before that; you have to manage multi-line strings yourself!

      This method has an additional functionality to the regular putString(int, int, String); if you embed ANSI CSI-style control sequences (like modifying text color or controlling SGR status), they will be interpreted as the string is printed and mutates the TextGraphics object. In this version of Lanterna, the following sequences are supported:

      • Set foreground color
      • Set background color
      • Set/Clear bold style
      • Set/Clear underline style
      • Set/Clear blink style
      • Set/Clear reverse style
      • Clear all styles and colors (notice that this will return the state to what it was at the start of the method)
      When the call is complete, the TextGraphics object will return to the color/style state it was in at the start of the call.
      Parameters:
      column - What column to put the string at
      row - What row to put the string at
      string - String to put on the screen
      Returns:
      Itself
    • putCSIStyledString

      TextGraphics putCSIStyledString(TerminalPosition position, String string)
      Puts a string on the screen at the specified position with the current colors and modifiers. If the string contains newlines (\r and/or \n), the method will stop at the character before that; you have to manage multi-line strings yourself!

      This method has an additional functionality to the regular putString(int, int, String); if you embed ANSI CSI-style control sequences (like modifying text color or controlling SGR status), they will be interpreted as the string is printed and mutates the TextGraphics object. In this version of Lanterna, the following sequences are supported:

      • Set foreground color
      • Set background color
      • Set/Clear bold style
      • Set/Clear underline style
      • Set/Clear blink style
      • Set/Clear reverse style
      • Clear all styles and colors (notice that this will return the state to what it was at the start of the method)
      When the call is complete, the TextGraphics object will return to the color/style state it was in at the start of the call.
      Parameters:
      position - Position to put the string at
      string - String to put on the screen
      Returns:
      Itself
    • getCharacter

      TextCharacter getCharacter(TerminalPosition position)
      Returns the character at the specific position in the terminal. May return null if the TextGraphics implementation doesn't support it or doesn't know what the character is.
      Parameters:
      position - Position to return the character for
      Returns:
      The text character at the specified position or null if not available
    • getCharacter

      TextCharacter getCharacter(int column, int row)
      Returns the character at the specific position in the terminal. May return null if the TextGraphics implementation doesn't support it or doesn't know what the character is.
      Parameters:
      column - Column to return the character for
      row - Row to return the character for
      Returns:
      The text character at the specified position or null if not available