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JLayeredPane.java: Rewrite to accomodate djee@redhat.com's recent inverse ordering of Container...

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2004-01-08  Graydon Hoare  <graydon@redhat.com>

	* javax/swing/JLayeredPane.java: Rewrite to accomodate
	djee@redhat.com's recent inverse ordering of Container elements.

From-SVN: r75608
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Graydon Hoare 2004-01-09 22:52:18 +00:00 committed by Graydon Hoare
parent c404ab029d
commit 27c99ffebc
2 changed files with 52 additions and 67 deletions
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libjava/ChangeLog
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@ -1,3 +1,8 @@
2004-01-08 Graydon Hoare <graydon@redhat.com>
* javax/swing/JLayeredPane.java: Rewrite to accomodate
djee@redhat.com's recent inverse ordering of Container elements.
2004-01-09 Michael Koch <konqueror@gmx.de>
* gnu/java/lang/ArrayHelper.java

114
libjava/javax/swing/JLayeredPane.java
View File

@ -68,16 +68,10 @@ import javax.accessibility.Accessible;
* this class:</p>
*
* <dl>
* <dt>Internal Component Index:</dt>
* <dt>Component Index:</dt>
* <dd>An offset into the <code>component</code> array held in our ancestor,
* {@link java.awt.Container}, from <code>[0 .. component.length)</code>. The drawing
* rule with internal indices is that 0 is drawn first.</dd>
*
* <dt>External Component Index:</dt>
* <dd>An offset into the "logical drawing order" of this container. If <code>I</code>
* is the internal index of a component, the external index <tt>E =
* component.length - I</tt>. The rule with external indices is that 0 is
* drawn last.</dd>
* rule with indices is that 0 is drawn last.</dd>
*
* <dt>Layer Number:</dt>
* <dd>A general <code>int</code> specifying a layer within this component. Negative
@ -89,6 +83,9 @@ import javax.accessibility.Accessible;
* is drawn last. Layer position -1 is a synonym for the first layer
* position (the logical "bottom").</dd>
*
* <p><b>Note:</b> the layer numbering order is the <em>reverse</em> of the
* component indexing and position order</p>
*
* @author Graydon Hoare <graydon@redhat.com>
*/
@ -131,23 +128,24 @@ public class JLayeredPane extends JComponent implements Accessible
}
/**
* Returns a pair of ints representing a half-open interval
* <code>[bottom, top)</code>, which is the range of internal component
* indices the provided layer number corresponds to.
* <p>Returns a pair of ints representing a half-open interval
* <code>[top, bottom)</code>, which is the range of component indices
* the provided layer number corresponds to.</p>
*
* Note that "top" is <em>not</em> included in the interval of
* component indices in this layer: a layer with 0 elements in it has
* <code>ret[0] == ret[1]</code>.
* <p>Note that "bottom" is <em>not</em> included in the interval of
* component indices in this layer: a layer with 0 elements in it has
* <code>ret[0] == ret[1]</code>.</p>
*
* @param layer the layer to look up.
* @return the half-open range of internal indices this layer spans.
* @return the half-open range of indices this layer spans.
* @throws IllegalArgumentException if layer does not refer to an active layer
* in this container.
*/
protected int[] layerToRange (Integer layer)
{
int[] ret = new int[2];
int[] ret = new int[2];
ret[1] = getComponents ().length;
Iterator i = layers.entrySet ().iterator ();
while (i.hasNext())
{
@ -156,12 +154,12 @@ public class JLayeredPane extends JComponent implements Accessible
Integer layerSz = (Integer) pair.getValue ();
if (layerNum == layer)
{
ret[1] = ret[0] + layerSz.intValue ();
ret[0] = ret[1] - layerSz.intValue ();
return ret;
}
else
{
ret[0] += layerSz.intValue ();
ret[1] -= layerSz.intValue ();
}
}
// should have found the layer during iteration
@ -280,12 +278,13 @@ public class JLayeredPane extends JComponent implements Accessible
{
Integer layer = getLayer (c);
int[] range = layerToRange (layer);
int top = (range[1] - 1);
int top = range[0];
int bot = range[1];
Component[] comps = getComponents ();
for (int i = range[0]; i < range[1]; ++i)
for (int i = top; i < bot; ++i)
{
if (comps[i] == c)
return top - i;
return i - top;
}
// should have found it
throw new IllegalArgumentException ();
@ -310,14 +309,15 @@ public class JLayeredPane extends JComponent implements Accessible
if (range[0] == range[1])
throw new IllegalArgumentException ();
int top = (range[1] - 1);
int top = range[0];
int bot = range[1];
if (position == -1)
position = top - range[0];
int targ = top - position;
position = (bot - top) - 1;
int targ = top + position;
int curr = -1;
Component[] comps = getComponents();
for (int i = range[0]; i < range[1]; ++i)
for (int i = top; i < bot; ++i)
{
if (comps[i] == c)
{
@ -336,8 +336,8 @@ public class JLayeredPane extends JComponent implements Accessible
/**
* Return an array of all components within a layer of this
* container. Components are ordered back-to-front, with the "back"
* element (which draws first) at position 0 of the returned array.
* container. Components are ordered front-to-back, with the "front"
* element (which draws last) at position 0 of the returned array.
*
* @param layer the layer to return components from.
* @return the components in the layer.
@ -351,7 +351,7 @@ public class JLayeredPane extends JComponent implements Accessible
else
{
Component[] comps = getComponents ();
int sz = (range[1] - 1) - range[0];
int sz = range[1] - range[0];
Component[] nc = new Component[sz];
for (int i = 0; i < sz; ++i)
nc[i] = comps[range[0] + i];
@ -361,7 +361,7 @@ public class JLayeredPane extends JComponent implements Accessible
/**
* Return the number of components within a layer of this
* container.
* container.
*
* @param layer the layer count components in.
* @return the number of components in the layer.
@ -386,20 +386,19 @@ public class JLayeredPane extends JComponent implements Accessible
return componentToLayer;
}
/**
* Return the index of a component within the underlying (contiguous)
* array of children. This is a "raw" number which does not represent the
* child's position in a layer, but rather its position in the
* concatenation of <em>all</em> layers within the container.
* child's position in a layer, but rather its position in the logical
* drawing order of all children of the container.
*
* @param c the component to look up.
* @return the internal index of the component.
* @return the external index of the component.
* @throws IllegalArgumentException if the component is not a child of
* this container.
*/
protected int getInternalIndexOf(Component c)
public int getIndexOf(Component c)
{
Integer layer = getLayer (c);
int[] range = layerToRange (layer);
@ -411,26 +410,6 @@ public class JLayeredPane extends JComponent implements Accessible
}
// should have found the component during iteration
throw new IllegalArgumentException ();
}
/**
* Return the external index of a component within the underlying
* (contiguous) array of children. This is a "raw" number which does not
* represent the child's position in a layer, but rather its position in
* the logical drawing order of all children of the container.
*
* @param c the component to look up.
* @return the external index of the component.
* @throws IllegalArgumentException if the component is not a child of
* this container.
*/
public int getIndexOf(Component c)
{
// returns the *external* index of the component.
int top = getComponentCount() - 1;
return top - getIndexOf (c);
}
/**
@ -472,13 +451,13 @@ public class JLayeredPane extends JComponent implements Accessible
}
/**
* Computes an internal index at which to request the superclass {@link
* Computes an index at which to request the superclass {@link
* java.awt.Container} inserts a component, given an abstract layer and
* position number.
*
* @param layer the layer in which to insert a component.
* @param position the position in the layer at which to insert a component.
* @return the internal index at which to insert the component.
* @return the index at which to insert the component.
*/
protected int insertIndexForLayer(int layer, int position)
@ -489,22 +468,22 @@ public class JLayeredPane extends JComponent implements Accessible
layers.put (lobj, new Integer (0));
int[] range = layerToRange (lobj);
if (range[0] == range[1])
return range[0];
return range[0];
int bottom = range[0];
int top = range[1] - 1;
if (position == -1 || position > (top - bottom))
return bottom;
int top = range[0];
int bot = range[1];
if (position == -1 || position > (bot - top))
return bot;
else
return top - position;
return top + position;
}
/**
* Removes a child from this container. The child is specified by
* internal index. After removal, the child no longer occupies a layer.
* index. After removal, the child no longer occupies a layer.
*
* @param index the internal index of the child component to remove.
* @param index the index of the child component to remove.
*/
public void remove (int index)
@ -525,7 +504,7 @@ public class JLayeredPane extends JComponent implements Accessible
public void remove (Component comp)
{
remove (getInternalIndexOf (comp));
remove (getIndexOf (comp));
}
/**
@ -546,7 +525,7 @@ public class JLayeredPane extends JComponent implements Accessible
}
/**
* Set the layer and position of a component, within this container.
* Set the layer and position of a component, within this container.
*
* @param c the child component to set the layer property for.
* @param layer the layer number to assign to the component.
@ -585,6 +564,7 @@ public class JLayeredPane extends JComponent implements Accessible
layer = DEFAULT_LAYER;
int newIdx = insertIndexForLayer(layer.intValue (), -1);
componentToLayer.put (comp, layer);
incrLayer (layer);