Class ZoomPanel 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----ZoomPanel
public class ZoomPanel
extends Panel
A subclass of Canvas that provides a detailed view of drawing visualization.

Variable Index

o CIRCLE_MODE
o GRAB_RADIUS
o LINE_MODE

Constructor Index

o ZoomPanel()
Construct a ZoomPanel.

Method Index

o canvasSizeNotify()
Called whenever the canvas size is set.
o create()
Creates and installs the subcomponents of ZoomPanel.
o drawPrimitive(Point, Point)
Draw a reconing primitive (line or circle) based on the two inputs.
o drawString(String, int, int)
Draws the specified string at the specified MainCanvas coordinates.
o handleEvent(Event)
Process the scrollbar events.
o minimumSize()
Returns the minimum size of ZoomPanel.
o paint(Graphics)
Paints the canvas including the cartesian grid and any rendered pixels.
o paintComponents(Graphics)
Paints the subcomponents of this panel.
o preferredSize()
Returns the preferred size of ZoomPanel.
o redrawPixels()
Redraw all the currently active pixels.
o reformat()
Reformats the background grid on the canvas when sizes are changed.
o repaint()
Repaint the canvas.
o resetDrawing()
Remove all drawn pixels from the MainCanvas.
o setCircleMode()
Set the primitive drawing mode to CIRCLE_MODE.
o setCircleValues(Point, Point)
Set circle parameters c (center) and r (radius) in CIRCLE_MODE.
o setLineEndPoints(Point, Point)
Set the line endpoints p1 and p2 in LINE_MODE.
o setLineMode()
Set the primitive drawing mode to LINE_MODE.
o setRes(int)
Set the pixel resolution size.
o update(Graphics)
Overrides the superclass paint() to eliminate clearing the canvas before repainting.
o writePixel(Point, float, boolean)
Write a pixel of the specified color at the specified location.

Variables

o LINE_MODE 
 public static final int LINE_MODE
o CIRCLE_MODE 
 public static final int CIRCLE_MODE
o GRAB_RADIUS 
 public static final int GRAB_RADIUS

Constructors

o ZoomPanel 
 public ZoomPanel()
Construct a ZoomPanel.

Methods

o paintComponents 
 public void paintComponents(Graphics g)
Paints the subcomponents of this panel.

Overrides:
paintComponents in class Container
o paint 
 public void paint(Graphics g)
Paints the canvas including the cartesian grid and any rendered pixels.

Overrides:
paint in class Container
o update 
 public void update(Graphics g)
Overrides the superclass paint() to eliminate clearing the canvas before repainting.

Overrides:
update in class Component
o repaint 
 public void repaint()
Repaint the canvas.

Overrides:
repaint in class Component
o handleEvent 
 public boolean handleEvent(Event event)
Process the scrollbar events.

Overrides:
handleEvent in class Component
o canvasSizeNotify 
 public void canvasSizeNotify()
Called whenever the canvas size is set.

o create 
 public void create()
Creates and installs the subcomponents of ZoomPanel.

o reformat 
 public void reformat()
Reformats the background grid on the canvas when sizes are changed.

o drawPrimitive 
 public void drawPrimitive(Point p1,
                           Point p2)
Draw a reconing primitive (line or circle) based on the two inputs.

o drawString 
 public void drawString(String str,
                        int x,
                        int y)
Draws the specified string at the specified MainCanvas coordinates.

o setLineMode 
 public void setLineMode()
Set the primitive drawing mode to LINE_MODE.

o setCircleMode 
 public void setCircleMode()
Set the primitive drawing mode to CIRCLE_MODE.

o setLineEndPoints 
 public void setLineEndPoints(Point p1,
                              Point p2)
Set the line endpoints p1 and p2 in LINE_MODE.

o setCircleValues 
 public void setCircleValues(Point p1,
                             Point p2)
Set circle parameters c (center) and r (radius) in CIRCLE_MODE.

o writePixel 
 public void writePixel(Point p,
                        float value,
                        boolean repaint)
Write a pixel of the specified color at the specified location. 'c' controls re-centering of the canvas when the specified pixel is off the canvas.

o resetDrawing 
 public void resetDrawing()
Remove all drawn pixels from the MainCanvas.

o preferredSize 
 public Dimension preferredSize()
Returns the preferred size of ZoomPanel.

Overrides:
preferredSize in class Container
o minimumSize 
 public Dimension minimumSize()
Returns the minimum size of ZoomPanel.

Overrides:
minimumSize in class Container
o setRes 
 public void setRes(int res)
Set the pixel resolution size.

o redrawPixels 
 public void redrawPixels()
Redraw all the currently active pixels.