Class WalkwayCanvas

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Canvas
                   |
                   +----WalkwayCanvas

class WalkwayCanvas

extends Canvas

CREATE

EDIT

offscreenG

offscreenImg

parent

buildCampus()

Macro to build the initial campus walkways

Clip()

Tells the status of the select rectangle

DrawingMode()

DrawingMode(int)

Set's Drawing Mode

keyDown(Event, int)

mouseDown(Event, int, int)

Mouse Down Event Handler

mouseDrag(Event, int, int)

Mouse Drag Event Handler

mouseUp(Event, int, int)

Mouse Up Event Handler

paint(Graphics)

Paints the canvas with the graph, and select rectangle (if visible), and sketch line (if creating an edge).

resize(int)

Resize all the nodes on the display

SetClip(boolean)

Sets the select rectangle to be visible or not

update(Graphics)

Update Routine- does not need to clear buffer since we are going to copy buffer while double buffering

  public final int CREATE

  public final int EDIT

  public Image offscreenImg

  public Graphics offscreenG

  protected IWalkways parent

  public int DrawingMode()

  public void DrawingMode(int m)

Set's Drawing Mode

Parameters:

m - Drawing mode

  public boolean Clip()

Tells the status of the select rectangle

Returns:

boolean- true if on (visible), false if off (not displayed)

  public void SetClip(boolean cl)

Sets the select rectangle to be visible or not

Parameters:

cl - clip rectangle status- true visible, false invisible

  public void update(Graphics g)

Update Routine- does not need to clear buffer since we are going to copy buffer while double buffering

Parameters:

g - graphics to draw into

Overrides:

update in class Component

  public boolean mouseUp(Event evt,
                         int x,
                         int y)

Mouse Up Event Handler

Parameters:

evt - event to be handled

x - x mouse position

y - y mouse position

Returns:

boolean- true if event handled, (all cases true)

Overrides:

mouseUp in class Component

  public boolean mouseDown(Event evt,
                           int x,
                           int y)

Mouse Down Event Handler

Parameters:

x - x mouse position

y - y mouse position

Returns:

boolean- true if event handled, (all cases true)

Overrides:

mouseDown in class Component

  public boolean mouseDrag(Event evt,
                           int x,
                           int y)

Mouse Drag Event Handler

Parameters:

x - x mouse position

y - y mouse position

Returns:

boolean- true if event handled, (all cases true)

Overrides:

mouseDrag in class Component

  public boolean keyDown(Event evt,
                         int key)

Overrides:

keyDown in class Component

  public void buildCampus()

Macro to build the initial campus walkways

  public void paint(Graphics g)

Paints the canvas with the graph, and select rectangle (if visible), and sketch line (if creating an edge). Double buffering is done here

Parameters:

g - graphics context

Overrides:

paint in class Canvas

  public void resize(int newsize)

Resize all the nodes on the display

Parameters:

newsize - new node size