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Class jschem.schemBoard

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Canvas
                   |
                   +----jschem.schemBoard

public class schemBoard

extends Canvas

implements MouseListener, MouseMotionListener, KeyListener

It inherits the Canvas type - so it can be used as every other AWT element.

schemBoard(int, int, int, String)

Setup a schematic board containing elements and connections.

addElement(String)

This method notifies the schem board that the user wants a new element.

deleteSelected()

If there is an element selected, we delete it!

editSelected()

If there is an element selected, we edit it!

getGraData()

A method to get a GRAPHICS data out of the current schematic.

getMaximumSize()

Some containers need this to lay out this canvas.

getMinimumSize()

Some containers need this to lay out this canvas.

getNetlist()

A method to get a SPICE netlist out of the current schematic.

getPreferredSize()

Some containers need this to lay out this canvas.

getProbes()

A method to get SPICE print cards for the probes out of the current schematic.

keyPressed(KeyEvent)

Needed to satisfy the keyListener interface - not needed here.

keyReleased(KeyEvent)

Needed to satisfy the keyListener interface - not needed here.

keyTyped(KeyEvent)

The part of the key listener interface used to watch key typing.

load(String)

Load a schematic board file containing elements and connections.

mouseClicked(MouseEvent)

Used to select elements or nets.

mouseDragged(MouseEvent)

Used to draw a new net segment interactive.

mouseEntered(MouseEvent)

Needed to satisfy the MouseListener interface - not needed here.

mouseExited(MouseEvent)

Needed to satisfy the MouseListener interface - not needed here.

mouseMoved(MouseEvent)

Used to update an element on hold (before it is correctly placed by the user)

mousePressed(MouseEvent)

Used to draw a new net segment interactive.

mouseReleased(MouseEvent)

Used to draw a new net segment interactive.

moveSelected()

If there is an element selected, we move it!

paint(Graphics)

A 'standard' paint method (called by the canvas' update).

rotateSelected()

If there is an element selected, we rotate it!

update(Graphics)

We replace the update method to do double-buffering.

 public schemBoard(int width,
                   int height,
                   int grid,
                   String preload)

Setup a schematic board containing elements and connections. A specific grid and a specific size must be given. Additionally a preload file containing graphical data may be given.

The current connectivity may contain 30 nets with 50 segments each.

Parameters:

width - width (grid counts)

height - height (grid counts)

grid - the grid in pixel everything relates on

preload - a URL where to find preload data (or null)

 public boolean load(String preload)

Load a schematic board file containing elements and connections.

Parameters:

preload - a URL where to find preload data (or null)

 public void update(Graphics g)

We replace the update method to do double-buffering. The new method creates a image, and calls update on this. Then the image is painted in one step without flashing.

Parameters:

g - the graphics context

Overrides:

update in class Component

 public void paint(Graphics g)

A 'standard' paint method (called by the canvas' update).

Parameters:

g - the graphics context

Overrides:

paint in class Canvas

 public boolean addElement(String el)

This method notifies the schem board that the user wants a new element. The element is created and hold in a special variable. Additionally it is 'shadowed' so the user can see easily the difference to an already placed element.

Parameters:

el - a string that describes the element to add (conforms to menu item)

 public void rotateSelected()

If there is an element selected, we rotate it!

 public void moveSelected()

If there is an element selected, we move it!

 public void editSelected()

If there is an element selected, we edit it!

 public void deleteSelected()

If there is an element selected, we delete it!

 public String getNetlist()

A method to get a SPICE netlist out of the current schematic. It greps through all elements which creates themselves the proper line for SPICE.

 public String getGraData()

A method to get a GRAPHICS data out of the current schematic. It greps through all elements which creates themselves the proper line for the GRA structure.

 public String getProbes()

A method to get SPICE print cards for the probes out of the current schematic. It greps through all elements which creates themselves the proper line for SPICE.

 public Dimension getMinimumSize()

Some containers need this to lay out this canvas.

Overrides:

getMinimumSize in class Component

 public Dimension getMaximumSize()

Some containers need this to lay out this canvas.

Overrides:

getMaximumSize in class Component

 public Dimension getPreferredSize()

Some containers need this to lay out this canvas.

Overrides:

getPreferredSize in class Component

 public void mouseClicked(MouseEvent e)

Used to select elements or nets.

A single click selects a net. Double click selects an element or a net segment.

Parameters:

e - The mouse event data.

 public void mousePressed(MouseEvent e)

Used to draw a new net segment interactive.

Set up starting point for a new segment drawn online within the schematic board.

Parameters:

e - The mouse event data.

 public void mouseReleased(MouseEvent e)

Used to draw a new net segment interactive.

Set up end point for a new segment drawn online within the schematic board. It adds the segment to the connectivity list and updates the element pins.

Parameters:

e - The mouse event data.

 public void mouseEntered(MouseEvent e)

Needed to satisfy the MouseListener interface - not needed here.

Parameters:

e - The mouse event data.

 public void mouseExited(MouseEvent e)

Needed to satisfy the MouseListener interface - not needed here.

Parameters:

e - The mouse event data.

 public void mouseDragged(MouseEvent e)

Used to draw a new net segment interactive.

Updates the endpoint for the online drawing within the schematic board. It checks the validity of the line (crossing elements is not allowed).

Parameters:

e - The mouse event data.

 public void mouseMoved(MouseEvent e)

Used to update an element on hold (before it is correctly placed by the user)

Parameters:

e - The mouse event data.

 public void keyTyped(KeyEvent e)

The part of the key listener interface used to watch key typing.

Parameters:

e - The key event data.

 public void keyPressed(KeyEvent e)

Needed to satisfy the keyListener interface - not needed here.

Parameters:

e - The key event data.

 public void keyReleased(KeyEvent e)

Needed to satisfy the keyListener interface - not needed here.

Parameters:

e - The key event data.

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