com.rolemodelsoft.drawlet.shapes.lines
Class LinePointHandle

java.lang.Object
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  +--com.rolemodelsoft.drawlet.basics.AbstractInputEventHandler
        |
        +--com.rolemodelsoft.drawlet.basics.CanvasHandle
              |
              +--com.rolemodelsoft.drawlet.basics.SquareCanvasHandle
                    |
                    +--com.rolemodelsoft.drawlet.shapes.lines.LinePointHandle

Direct Known Subclasses:

ConnectingLinePointHandle

public class LinePointHandle

extends SquareCanvasHandle

implements FigureHolder

This class provides a handle that shows up at a particular Locator on a line and reshapes the figure accordingly as it is dragged.

Field Summary

protected LineFigure	figure The figure to which we are attached.
protected int	index The index of the point (vertex) on the line we manipulate.

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

canvas, halfWidth, HANDLE_SIZE, previousTool

Constructor Summary

LinePointHandle(LineFigure figure, int index)
Constructs and initializes a new instance of a handle which can affect the the position of a particular point defining a line.

Method Summary

protected int	centerX() Answer the x coordinate at the center of the handle.
protected int	centerY() Answer the y coordinate at the center of the handle.
Figure	getFigure() Answers the figure associated with this handle.
void	mouseDragged(java.awt.event.MouseEvent evt) Called if the mouse is dragged (the mouse button is down).
void	mouseReleased(java.awt.event.MouseEvent evt) Called if the mouse is released (the mouse button goes up).
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, 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 LineFigure figure

The figure to which we are attached.

index

protected int index

The index of the point (vertex) on the line we manipulate.

Constructor Detail

LinePointHandle

public LinePointHandle(LineFigure figure,
                       int index)

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

Parameters:

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

index - the identifying index of the point of interest.

Method Detail

centerX

protected 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

protected int centerY()

Answer the y coordinate at the center of the handle.

Overrides:

centerY in class SquareCanvasHandle

Returns:

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

getFigure

public Figure getFigure()

Answers 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 (the mouse button is down).

Overrides:

mouseDragged in class AbstractInputEventHandler

Parameters:

evt - the event

See Also:

move(int, int)

mouseReleased

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

Called if the mouse is released (the mouse button goes up).

Overrides:

mouseReleased in class CanvasHandle

Parameters:

evt - the event

move

public void move(int x,
                 int y)

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

Parameters:

x - the x coordinate for the new location of the point

y - the y coordinate for the new location of the point

setFigure

public void setFigure(Figure newFigure)

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

Specified by:

setFigure in interface FigureHolder

Parameters:

newFigure - the new LineFigure to affect.

Throws:

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