Interface DrawInterface

All Superinterfaces:

java.awt.event.ActionListener, java.util.EventListener

All Known Implementing Classes:

UserInterface

public interface DrawInterface
extends java.awt.event.ActionListener

Method Summary

Modifier and Type	Method and Description
void	clear() Clears the screen.
void	drawCircle(int x0, int y0, int circleRadius, boolean isFilled) Draws a circle.
void	drawRectangle(int x0, int y0, int w, int h, boolean isFilled) Draws a rectangle.
void	drawText(int x0, int y0, java.lang.String text) Draws text.
void	drawTriangle(int x0, int y0, int x1, int y1, int x2, int y2) Draws a triangle.
int	graphicsHeight() Returns drawing surface height.
int	graphicsWidth() Returns drawing surface width.
void	initializeGraphics()

Methods inherited from interface java.awt.event.ActionListener

actionPerformed

Method Detail

initializeGraphics

void initializeGraphics()

graphicsWidth

int graphicsWidth()

Returns drawing surface width.

Returns:

returns the width

graphicsHeight

int graphicsHeight()

Returns drawing surface height.

Returns:

returns the height

drawCircle

void drawCircle(int x0,
                int y0,
                int circleRadius,
                boolean isFilled)

Draws a circle.

1. Use the graphics context to draw a circle (filled or outline).
2. Call the update method.

Parameters:

x0 - the x coordinate of the upper left corner of the oval to be drawn.

y0 - the y coordinate of the upper left corner of the oval to be drawn.

circleRadius - the radius of the circle.

isFilled - true if the oval is solid, false if it's the outline.

drawRectangle

void drawRectangle(int x0,
                   int y0,
                   int w,
                   int h,
                   boolean isFilled)

Draws a rectangle.

1. Use the graphics context to draw a rectangle (filled or outline)
2. Call the update method.

Parameters:

x0 - the x coordinate of the rectangle to be drawn.

y0 - the y coordinate of the rectangle to be drawn.

w - the width of the rectangle to be drawn.

h - the height of the rectangle to be drawn.

isFilled - true if the rectangle is solid, false if it's the outline.

drawTriangle

void drawTriangle(int x0,
                  int y0,
                  int x1,
                  int y1,
                  int x2,
                  int y2)

Draws a triangle.

1. Use the graphics context to draw a triangle (outline).
2. Call the update method.

Parameters:

x0 - the x coordinate of the location where the first angle should be rendered.

y0 - the y coordinate of the location where the first angle should be rendered.

x1 - the x coordinate of the location where the second angle should be rendered.

y1 - the y coordinate of the location where the second angle should be rendered.

x2 - the x coordinate of the location where the third angle should be rendered.

y2 - the y coordinate of the location where the third angle should be rendered.

drawText

void drawText(int x0,
              int y0,
              java.lang.String text)

Draws text.

1. Create a new Font with the following arguments:
   • A random font from the instance called fonts. To select and random legal font, call the rand method in the DrawPrimitives class with the length of the Font array.
   • Call DrawPrimitives.rand(int) with 0, 1, or 2. These numbers represent plain, bold, or italic.
   • Call DrawPrimitives.rand(int) with 35. This will return a random number for the size of the font.
2. Use the graphics context to draw a text string.
3. Call the update method.

Parameters:

x0 - the x coordinate of the location where the String should be rendered.

y0 - the y coordinate of the location where the String should be rendered.

text - the text to be rendered.

clear

void clear()

Clears the screen.
Use the graphics context to clear screen and set the field numberPrimitives back to 0.