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CardLayout.java (show): Rewrote.

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2003-01-15  Scott Gilbertson  <scottg@mantatest.com>

	* java/awt/CardLayout.java (show): Rewrote.
	(gotoComponent): Removed `target' argument.  Simplified code.
	Don't pre-compute `choice' unless `what' is FIRST or LAST.
	Changed all callers.
	(NONE): Removed.

From-SVN: r61357
This commit is contained in:
Scott Gilbertson 2003-01-15 22:47:04 +00:00 committed by Tom Tromey
parent 3dd5fc583b
commit 09d096a8d7
2 changed files with 34 additions and 21 deletions
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8
libjava/ChangeLog
View File

@ -1,3 +1,11 @@
2003-01-15 Scott Gilbertson <scottg@mantatest.com>
* java/awt/CardLayout.java (show): Rewrote.
(gotoComponent): Removed `target' argument. Simplified code.
Don't pre-compute `choice' unless `what' is FIRST or LAST.
Changed all callers.
(NONE): Removed.
2003-01-14 Michael Koch <konqueror@gmx.de>
* java/net/InetSocketAddress.java

45
libjava/java/awt/CardLayout.java
View File

@ -1,6 +1,6 @@
// CardLayout.java - Card-based layout engine
/* Copyright (C) 1999, 2000, 2002 Free Software Foundation
/* Copyright (C) 1999, 2000, 2002, 2003 Free Software Foundation
This file is part of GNU Classpath.
@ -110,7 +110,7 @@ public class CardLayout implements LayoutManager2, Serializable
*/
public void first (Container parent)
{
gotoComponent (parent, FIRST, null);
gotoComponent (parent, FIRST);
}
/** Return this layout manager's horizontal gap. */
@ -154,7 +154,7 @@ public class CardLayout implements LayoutManager2, Serializable
*/
public void last (Container parent)
{
gotoComponent (parent, LAST, null);
gotoComponent (parent, LAST);
}
/**
@ -210,7 +210,7 @@ public class CardLayout implements LayoutManager2, Serializable
*/
public void next (Container parent)
{
gotoComponent (parent, NEXT, null);
gotoComponent (parent, NEXT);
}
/** Get the preferred layout size of the container.
@ -228,7 +228,7 @@ public class CardLayout implements LayoutManager2, Serializable
*/
public void previous (Container parent)
{
gotoComponent (parent, PREV, null);
gotoComponent (parent, PREV);
}
/** Remove the indicated component from this layout manager.
@ -273,7 +273,21 @@ public class CardLayout implements LayoutManager2, Serializable
{
Object target = tab.get (name);
if (target != null)
gotoComponent (parent, NONE, (Component) target);
{
int num = parent.ncomponents;
// This is more efficient than calling getComponents().
Component[] comps = parent.component;
for (int i = 0; i < num; ++i)
{
if (comps[i].isVisible())
{
if (target == comps[i])
return;
comps[i].setVisible (false);
}
}
((Component) target).setVisible (true);
}
}
/**
@ -286,9 +300,11 @@ public class CardLayout implements LayoutManager2, Serializable
return getClass ().getName () + "[" + hgap + "," + vgap + "]";
}
// This implements first(), last(), next(), and previous().
private void gotoComponent (Container parent, int what,
Component target)
/** This implements first(), last(), next(), and previous().
* @param parent The parent container
* @param what The type of goto: FIRST, LAST, NEXT or PREV
*/
private void gotoComponent (Container parent, int what)
{
synchronized (parent.getTreeLock ())
{
@ -301,19 +317,9 @@ public class CardLayout implements LayoutManager2, Serializable
choice = 0;
else if (what == LAST)
choice = num - 1;
else if (what >= 0)
choice = what;
for (int i = 0; i < num; ++i)
{
// If TARGET is set then we are looking for a specific
// component.
if (target != null)
{
if (target == comps[i])
choice = i;
}
if (comps[i].isVisible ())
{
if (what == NEXT)
@ -403,7 +409,6 @@ public class CardLayout implements LayoutManager2, Serializable
private int LAST = 1;
private int NEXT = 2;
private int PREV = 3;
private int NONE = 4;
// These constants are used by the private getSize method.
private int MIN = 0;