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Class demo.PaintCanvas 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Canvas
                   |
                   +----demo.PaintCanvas
public class PaintCanvas
extends Canvas
implements MouseMotionListener, ActionListener
T°φda slou╛φcφ pro vytvo°enφ plßtna. Zachycuje udßlosti "pohyb my╣i" a "stisk tlaΦφtka" - proto implementuje uvedenß rozhranφ.

See Also:
MouseMotionListener, ActionListener

Variable Index

o offGraphics
o offImage
o oldx
o oldy

Constructor Index

o PaintCanvas()
Konstruktor

Method Index

o actionPerformed(ActionEvent)
Metoda actionPerformed() je volanß stisku tlaΦφtka "Clear".
o getMinimumSize()
Metoda getMinimumSize() musφ b²t implementovßna kv∙li urΦenφ velikosti pro layout manager.
o getPreferredSize()
Metoda getPreferredSize() musφ b²t implementovßna kv∙li urΦenφ velikosti pro layout manager.
o mouseDragged(MouseEvent)
Metoda mouseDragged() je volanß p°i pohybu a souΦasnΘm dr╛enφ tlaΦφtka my╣i.
o mouseMoved(MouseEvent)
Metoda mouseMoved() je volanß p°i pohybu my╣i (bez stisku tlaΦφtka).
o paint(Graphics)
Metoda paint() provßdφ vykreslenφ obsahu plßtna - p°ekopφruje skryt² buffer do grafickΘho kontextu komponenty (parametr g).
o update(Graphics)
Metoda update() je volßna p°i p°ekreslovßnφ komponenty.

Variables

o offGraphics 
 Graphics offGraphics
o offImage 
 Image offImage
o oldx 
 int oldx
o oldy 
 int oldy

Constructors

o PaintCanvas 
 public PaintCanvas()
Konstruktor

Methods

o getMinimumSize 
 public Dimension getMinimumSize()
Metoda getMinimumSize() musφ b²t implementovßna kv∙li urΦenφ velikosti pro layout manager.

Returns:
minimßlnφ velikost komponenty (plßtna).
Overrides:
getMinimumSize in class Component
o getPreferredSize 
 public Dimension getPreferredSize()
Metoda getPreferredSize() musφ b²t implementovßna kv∙li urΦenφ velikosti pro layout manager.

Returns:
preferovanou velikost komponenty (plßtna).
Overrides:
getPreferredSize in class Component
o mouseDragged 
 public void mouseDragged(MouseEvent e)
Metoda mouseDragged() je volanß p°i pohybu a souΦasnΘm dr╛enφ tlaΦφtka my╣i.

o mouseMoved 
 public void mouseMoved(MouseEvent e)
Metoda mouseMoved() je volanß p°i pohybu my╣i (bez stisku tlaΦφtka).

o actionPerformed 
 public void actionPerformed(ActionEvent e)
Metoda actionPerformed() je volanß stisku tlaΦφtka "Clear".

o update 
 public void update(Graphics g)
Metoda update() je volßna p°i p°ekreslovßnφ komponenty. Standardn∞ vyma╛e pozadφ a volß metodu paint(). Je p°edefinovßna, aby nedochßzelo k blikßnφ.

Overrides:
update in class Component
o paint 
 public void paint(Graphics g)
Metoda paint() provßdφ vykreslenφ obsahu plßtna - p°ekopφruje skryt² buffer do grafickΘho kontextu komponenty (parametr g).

Overrides:
paint in class Canvas 
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