com.rolemodelsoft.drawlet.shapes.polygons
Class PolygonPointHandle

java.lang.Object
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  +--com.rolemodelsoft.drawlet.basics.AbstractInputEventHandler
        |
        +--com.rolemodelsoft.drawlet.basics.CanvasHandle
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              +--com.rolemodelsoft.drawlet.basics.SquareCanvasHandle
                    |
                    +--com.rolemodelsoft.drawlet.shapes.polygons.PolygonPointHandle

public class PolygonPointHandle

extends SquareCanvasHandle

implements FigureHolder

This class provides a handle that shows up at a particular Locator on a PolygonFigure and reshapes the figure accordingly as it is dragged. If the first and last point of the polygon are the same, it moves them both.

Field Summary

protected PolygonFigure	figure The figure to which the handle is attached.
protected int	index The index of the point (vertex) we manipulate.

Fields inherited from class com.rolemodelsoft.drawlet.basics.CanvasHandle

canvas, halfWidth, HANDLE_SIZE, previousTool

Constructor Summary

PolygonPointHandle(PolygonFigure figure, int index)
Constructs and initializes a new instance of a handle which can affect the the position of a particular point defining a polygon.

Method Summary

int	centerX() Answer the x coordinate at the center of the handle.
int	centerY() Answer the y coordinate at the center of the handle.
Figure	getFigure() Returns the Figure associated with this handle.
void	mouseDragged(java.awt.event.MouseEvent evt) Called if the mouse is dragged (moved with the mouse button down).
void	move(int x, int y) Reshape the figure by moving the corresponding point and cleanly repaint the canvas.
void	setFigure(Figure newFigure) Set the figure the receiver is holding.

Methods inherited from class com.rolemodelsoft.drawlet.basics.SquareCanvasHandle

getBounds, paint

Methods inherited from class com.rolemodelsoft.drawlet.basics.CanvasHandle

contains, defaultHandleSize, finished, getHandleHeight, getHandleSize, getHandleWidth, getX, getY, intersects, mouseReleased, releaseControl, setHandleSize, takeControl

Methods inherited from class com.rolemodelsoft.drawlet.basics.AbstractInputEventHandler

keyPressed, keyReleased, keyTyped, mouseClicked, mouseDoubleClicked, mouseEntered, mouseExited, mouseMoved, mousePressed, mouseSingleClicked

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

figure

protected PolygonFigure figure

The figure to which the handle is attached.

index

protected int index

The index of the point (vertex) we manipulate.

Constructor Detail

PolygonPointHandle

public PolygonPointHandle(PolygonFigure figure,
                          int index)

Constructs and initializes a new instance of a handle which can affect the the position of a particular point defining a polygon.

Parameters:

figure - the figure whose point (vertex) we may wish to move.

index - the identifying index of the point of interest

Method Detail

centerX

public int centerX()

Answer the x coordinate at the center of the handle.

Overrides:

centerX in class SquareCanvasHandle

Returns:

an integer representing the x coordinate at the center of the handle.

centerY

public int centerY()

Answer the y coordinate at the center of the handle.

Overrides:

centerY in class SquareCanvasHandle

Returns:

an integer representing the y coordinate at the center of the handle.

getFigure

public Figure getFigure()

Returns the Figure associated with this handle.

Specified by:

getFigure in interface FigureHolder

Returns:

the Figure associated with this handle.

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent evt)

Called if the mouse is dragged (moved with the mouse button down). Move the particular point of the polygon accordingly.

Overrides:

mouseDragged in class AbstractInputEventHandler

Parameters:

evt - the event

See Also:

move(int, int)

move

public void move(int x,
                 int y)

Reshape the figure by moving the corresponding point and cleanly repaint the canvas.

Parameters:

x - an integer representing the x coordinate to move to.

y - an integer representing the y coordinate to move to.

setFigure

public void setFigure(Figure newFigure)

Set the figure the receiver is holding. Note: in this case, it must be a PolygonFigure.

Specified by:

setFigure in interface FigureHolder

Parameters:

newFigure - the new PolygonFigure to affect.

Throws:

java.lang.IllegalArgumentException - If the figure is not a PolygonFigure.