Quick Summary of Graphic Objects and Methods

Constructors for Auxilliary Classes

new Color(redness, greenness, blueness); Mix a new color. Parameter values are numbers between 0 and 255.
new Location(x,y); Build a coordinate pair object for the point (x,y).

Accessor Methods for Auxilliary Classes

someColor.getRed()
someColor.getGreen()
someColor.getBlue()
Access any of the color values associated with a Color.
someLocation.getX()
someLocation.getY()
Access either of the elements of a coordinate pair.
someLocation.distanceTo( anotherLocation )
Determine the distance between two points.

Constructors for Graphic Objects

new FramedRect( x, y, width, height, canvas);
new FilledRect( x, y, width, height, canvas);
new FramedOval( x, y, width, height, canvas);
new FilledOval( x, y, width, height, canvas);

new FramedRect( corner1Location, corner2Location, canvas);
new FilledRect( corner1Location, corner2Location, canvas);
new FramedOval( corner1Location, corner2Location, canvas);
new FilledOval( corner1Location, corner2Location, canvas);

new FramedRect( cornerLocation, width, height, canvas);
new FilledRect( cornerLocation, width, height, canvas);
new FramedOval( cornerLocation, width, height, canvas);
new FilledOval( cornerLocation, width, height, canvas);

The parameters to a rectangle or oval constructor describe the rectangle bounding the object to be drawn. You can either:
  • Specify the coordinates of the rectangle's upper left corner together with the width and height, or
  • Specify the coordinates of two opposite corners.

You can fill these shapes or just frame their perimeters.

new Line( startX, startY, endX, endY, canvas);
new Line( startLocation, endLocation, canvas);
A line is described by giving its end points.
new Text( "some message", x, y, canvas);
new Text( "some message", baseLocation, canvas);
The coordinates specify the leftmost point of the text's baseline.

Methods Available for All Graphic Objects

someObject.move( xOffset, yOffset);

Move an object relative to its current position.
someObject.moveTo( x, y);
someObject.moveTo( someLocation);
Move an object to point specified by coordinates.
someObject.contains( someLocation);
Determine if an object's bounding box contains a point.
someObject.hide();
someObject.show();
Make an object invisible or visible on the display.
someObject.removeFromCanvas();
Delete object from its canvas.
someObject.sendForward();
someObject.sendToFront();
someObject.sendBackward();
someObject.sendToBack();
Alter the stacking order that controls how overlapping objects appear.
someObject.getColor();
someObject.setColor( someColor ); 		Access or change an object's color.

Methods Available for All 2-D Graphic Objects (including Text, but not Line)

someObject.getX();
someObject.getY();
someObject.getLocation();

Access coordinates of the upper left corner of an object's bounding rectangle.
someObject.getWidth();
someObject.getHeight(); 		Access the dimensions of an object's bounding rectangle.

Methods Available for Resizable 2-D Graphic Objects (not Text)

someObject.setWidth( newWidth);
someObject.setheight( newHt);

Change the dimensions of an object's bounding rectangle.

Mutator Methods for Lines

someLine.setStart( someLocation );
someLine.setEnd( someLocation );
someLine.setEndPoints( startLocation, endLocation);

Change either or both of a line's end points.

Mutator Methods for Text Objects

someText.setText( "new message" );
Change the characters displayed.
someText.setFontSize( pointSize );
Change the font size used.
someText.setBold();
someText.setItalic();
someText.setPlain();
Change the style in which text is displayed.
someText.setFont( someFont )
Change the font used.