File	Doc	Category	Size	Date	Package
Spacer.java	API Doc	J2ME MIDP 2.0	6799	Thu Nov 07 12:02:28 GMT 2002	javax.microedition.lcdui

Spacer

• java.lang.Object
  • Item

Fields Summary
private int	width The preferred (and minimum) width of this Spacer
private int	height The preferred (and minimum) height of this Spacer

Constructors Summary

public Spacer(int minWidth, int minHeight) Creates a new Spacer with the given minimum size. The Spacer's label is null. The minimum size must be zero or greater. If minWidth is greater than the implementation-defined maximum width, the maximum width will be used instead. If minHeight is greater than the implementation-defined maximum height, the maximum height will be used instead. param minWidth the minimum width in pixels param minHeight the minimum height in pixels throws IllegalArgumentException if either minWidth or minHeight is less than zero super(null); updateSizes(minWidth, minHeight);

Methods Summary
public void	addCommand(Command cmd) Spacers are restricted from having Commands, so this method will always throw IllegalStateException whenever it is called. param cmd the Command throws IllegalStateException always throw new IllegalStateException();
int	callMinimumHeight() Get the minimum height of this Item return the minimum height return height;
int	callMinimumWidth() Get the minimum width of this Item return the minimum width return width;
void	callPaint(Graphics g, int w, int h) Paint the content of this Item param g the Graphics object to be used for rendering the item param w current width of the item in pixels param h current height of the item in pixels /* * There's no reason to erase anything because Form will erase * any dirty region for us * g.setColor(Display.ERASE_COLOR); g.fillRect(g.getClipX(), g.getClipY(), g.getClipWidth(), g.getClipHeight()); g.setColor(Display.FG_COLOR); */
int	callPreferredHeight(int w) Get the preferred height of this Item param w the tentative content width in pixels, or -1 if a tentative width has not been computed return the preferred height return height;
int	callPreferredWidth(int h) Get the preferred width of this Item param h the tentative content height in pixels, or -1 if a tentative height has not been computed return the preferred width return width;
public void	setDefaultCommand(Command cmd) Spacers are restricted from having Commands, so this method will always throw IllegalStateException whenever it is called. param cmd the Command throws IllegalStateException always throw new IllegalStateException();
public void	setLabel(java.lang.String label) Spacers are restricted to having null labels, so this method will always throw IllegalStateException whenever it is called. param label the label string throws IllegalStateException always throw new IllegalStateException();
public void	setMinimumSize(int minWidth, int minHeight) Sets the minimum size for this spacer. The Form will not be allowed to make the item smaller than this size. The minimum size must be zero or greater. If minWidth is greater than the implementation-defined maximum width, the maximum width will be used instead. If minHeight is greater than the implementation-defined maximum height, the maximum height will be used instead. param minWidth the minimum width in pixels param minHeight the minimum height in pixels throws IllegalArgumentException if either minWidth or minHeight is less than zero updateSizes(minWidth, minHeight);
boolean	shouldSkipTraverse() Determine if this Item should not be traversed to return true if this Item should not be traversed to return true;
private void	updateSizes(int minW, int minH) Update the width and height values of this spacer, guaranteeing the new values are positive. This method will also invalidate the containing Form. param minW the new width param minH the new height if (minW < 0 || minH < 0) { throw new IllegalArgumentException(); } synchronized (Display.LCDUILock) { width = minW; height = minH; invalidate(); }