mirror of git://gcc.gnu.org/git/gcc.git
693 lines
15 KiB
Java
693 lines
15 KiB
Java
/* Copyright (C) 1999, 2000 Free Software Foundation
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This file is part of libjava.
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This software is copyrighted work licensed under the terms of the
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Libjava License. Please consult the file "LIBJAVA_LICENSE" for
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details. */
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package java.awt;
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import java.awt.event.*;
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import java.io.PrintStream;
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import java.io.PrintWriter;
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import java.util.EventListener;
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import java.awt.peer.ComponentPeer;
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import java.awt.peer.ContainerPeer;
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import java.awt.peer.LightweightPeer;
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/* A somewhat incomplete class. */
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public class Container extends Component
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{
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/* Serialized fields from the serialization spec. */
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int ncomponents;
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Component[] component;
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LayoutManager layoutMgr;
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/* LightweightDispatcher dispatcher; */ // wtf?
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Dimension maxSize;
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int containerSerializedDataVersion;
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/* Anything else is non-serializable, and should be declared "transient". */
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transient ContainerListener containerListener;
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public Container()
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{
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}
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public int getComponentCount()
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{
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return ncomponents;
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}
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/** @deprecated Use getComponentCount() instead. */
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public int countComponents()
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{
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return ncomponents;
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}
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public Component getComponent (int n)
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{
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if (n < 0 || n >= ncomponents)
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throw new ArrayIndexOutOfBoundsException("no such component");
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return component[n];
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}
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public Component[] getComponents()
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{
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Component[] result = new Component[ncomponents];
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if (ncomponents > 0)
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System.arraycopy(component, 0, result, 0, ncomponents);
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return result;
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}
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public Insets getInsets()
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{
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if (peer == null)
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return new Insets(0, 0, 0, 0);
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return ((ContainerPeer) peer).getInsets();
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}
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/** @deprecated Use getInsets() instead. */
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public Insets insets()
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{
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return getInsets();
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}
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public Component add (Component comp)
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{
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addImpl (comp, null, -1);
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return comp;
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}
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public Component add (String name, Component comp)
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{
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addImpl (comp, name, -1);
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return comp;
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}
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public Component add (Component comp, int index)
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{
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addImpl (comp, null, index);
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return comp;
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}
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public void add (Component comp, Object constraints)
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{
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addImpl (comp, constraints, -1);
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}
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public void add (Component comp, Object constraints, int index)
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{
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addImpl (comp, constraints, index);
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}
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protected void addImpl (Component comp, Object constraints, int index)
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{
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if (index > ncomponents
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|| comp instanceof Window
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|| (comp instanceof Container
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&& ((Container) comp).isAncestorOf (this)))
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throw new IllegalArgumentException ();
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// Reparent component, and make sure component is instantiated if
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// we are.
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if (comp.parent != null)
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comp.parent.remove (comp);
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comp.parent = this;
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if (peer != null)
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{
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comp.addNotify ();
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if (comp.isLightweight())
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enableEvents(comp.eventMask);
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}
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invalidate ();
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if (component == null)
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component = new Component[4]; // FIXME, better initial size?
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// This isn't the most efficient implementation. We could do less
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// copying when growing the array. It probably doesn't matter.
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if (ncomponents >= component.length)
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{
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int nl = component.length * 2;
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Component[] c = new Component[nl];
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System.arraycopy (component, 0, c, 0, ncomponents);
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component = c;
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}
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if (index == -1)
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component[ncomponents++] = comp;
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else
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{
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System.arraycopy (component, index, component, index + 1,
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ncomponents - index);
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component[index] = comp;
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++ncomponents;
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}
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// Notify the layout manager.
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if (layoutMgr != null)
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{
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if (constraints != null && layoutMgr instanceof LayoutManager2)
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{
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LayoutManager2 lm2 = (LayoutManager2) layoutMgr;
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lm2.addLayoutComponent (comp, constraints);
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}
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else
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layoutMgr.addLayoutComponent ((String) constraints, comp);
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}
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ContainerEvent ce = new ContainerEvent (this,
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ContainerEvent.COMPONENT_ADDED,
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comp);
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dispatchEvent (ce);
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}
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public void remove (int index)
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{
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Component r = component[index];
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r.removeNotify ();
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System.arraycopy (component, index + 1, component, index,
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ncomponents - index - 1);
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component[--ncomponents] = null;
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invalidate ();
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if (layoutMgr != null)
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layoutMgr.removeLayoutComponent (r);
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ContainerEvent ce = new ContainerEvent (this,
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ContainerEvent.COMPONENT_REMOVED,
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r);
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dispatchEvent (ce);
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}
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public void remove (Component comp)
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{
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for (int i = 0; i < ncomponents; ++i)
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{
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if (component[i] == comp)
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{
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remove (i);
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break;
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}
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}
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}
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public void removeAll()
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{
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while (ncomponents > 0)
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remove (0);
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}
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public LayoutManager getLayout()
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{
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return layoutMgr;
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}
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public void setLayout(LayoutManager mgr)
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{
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layoutMgr = mgr;
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invalidate ();
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}
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public void doLayout()
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{
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if (layoutMgr != null)
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layoutMgr.layoutContainer (this);
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}
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/** @deprecated Use doLayout() instead. */
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public void layout()
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{
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doLayout();
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}
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public void invalidate()
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{
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super.invalidate ();
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}
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public void validate()
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{
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if (! isValid ())
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{
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validateTree ();
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}
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}
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protected void validateTree()
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{
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if (valid) return;
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ContainerPeer cPeer = null;
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if ((peer != null) && !(peer instanceof LightweightPeer))
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{
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cPeer = (ContainerPeer) peer;
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cPeer.beginValidate();
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}
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doLayout ();
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for (int i = 0; i < ncomponents; ++i)
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{
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Component comp = component[i];
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if (comp instanceof Container)
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{
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((Container) comp).validateTree();
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}
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else
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{
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component[i].validate();
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}
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}
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/* children will call invalidate() when they are layed out. It
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is therefore imporant that valid is not set to true
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before after the children has been layed out. */
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valid = true;
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if (cPeer != null)
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cPeer.endValidate();
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}
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public void setFont(Font f)
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{
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super.setFont(f);
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// FIXME, should invalidate all children with font == null
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}
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public Dimension getPreferredSize()
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{
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if (layoutMgr != null)
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return layoutMgr.preferredLayoutSize (this);
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else
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return super.getPreferredSize ();
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}
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/** @deprecated Use getPreferredSize() instead */
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public Dimension preferredSize()
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{
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return getPreferredSize();
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}
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public Dimension getMinimumSize()
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{
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if (layoutMgr != null)
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return layoutMgr.minimumLayoutSize (this);
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else
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return super.getMinimumSize ();
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}
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/** @deprecated Use getMinimumSize() instead */
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public Dimension minimumSize()
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{
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return getMinimumSize();
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}
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public Dimension getMaximumSize()
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{
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if (layoutMgr != null && layoutMgr instanceof LayoutManager2)
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{
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LayoutManager2 lm2 = (LayoutManager2) layoutMgr;
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return lm2.maximumLayoutSize (this);
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}
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else
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return super.getMaximumSize ();
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}
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public float getAlignmentX()
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{
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if (layoutMgr instanceof LayoutManager2)
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{
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LayoutManager2 lm2 = (LayoutManager2) layoutMgr;
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return lm2.getLayoutAlignmentX (this);
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}
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else
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return CENTER_ALIGNMENT;
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}
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public float getAlignmentY()
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{
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if (layoutMgr instanceof LayoutManager2)
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{
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LayoutManager2 lm2 = (LayoutManager2) layoutMgr;
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return lm2.getLayoutAlignmentY (this);
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}
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else
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return CENTER_ALIGNMENT;
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}
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public void paint(Graphics g)
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{
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if (!isShowing())
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return;
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super.paint(g);
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visitChildren(g, GfxPaintVisitor.INSTANCE, true);
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}
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/**
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* Perform a graphics operation on the children of this container.
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* For each applicable child, the visitChild() method will be called
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* to perform the graphics operation.
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*
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* @param gfx The graphics object that will be used to derive new
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* graphics objects for the children.
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*
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* @param visitor Object encapsulating the graphics operation that
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* should be performed.
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*
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* @param lightweightOnly If true, only lightweight components will
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* be visited.
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*/
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private void visitChildren(Graphics gfx, GfxVisitor visitor,
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boolean lightweightOnly)
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{
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// FIXME: do locking
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for (int i = 0; i < ncomponents; ++i)
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{
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Component comp = component[i];
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boolean applicable = comp.isVisible()
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&& (comp.isLightweight() || !lightweightOnly);
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if (applicable)
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visitChild(gfx, visitor, comp);
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}
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}
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/**
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* Perform a graphics operation on a child. A translated and clipped
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* graphics object will be created, and the visit() method of the
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* visitor will be called to perform the operation.
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*
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* @param gfx The graphics object that will be used to derive new
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* graphics objects for the child.
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*
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* @param visitor Object encapsulating the graphics operation that
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* should be performed.
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*
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* @param comp The child component that should be visited.
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*/
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private void visitChild(Graphics gfx, GfxVisitor visitor,
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Component comp)
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{
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Rectangle bounds = comp.getBounds();
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Rectangle clip = gfx.getClipBounds().intersection(bounds);
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if (clip.isEmpty()) return;
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Graphics gfx2 = gfx.create();
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gfx2.setClip(clip.x, clip.y, clip.width, clip.height);
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gfx2.translate(bounds.x, bounds.y);
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visitor.visit(comp, gfx2);
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}
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public void update(Graphics g)
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{
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super.update(g);
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}
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public void print(Graphics g)
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{
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super.print(g);
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visitChildren(g, GfxPrintVisitor.INSTANCE, true);
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}
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public void paintComponents(Graphics g)
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{
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super.paint(g);
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visitChildren(g, GfxPaintAllVisitor.INSTANCE, true);
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}
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public void printComponents(Graphics g)
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{
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super.paint(g);
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visitChildren(g, GfxPrintAllVisitor.INSTANCE, true);
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}
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void dispatchEventImpl(AWTEvent e)
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{
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if ((e.id <= ContainerEvent.CONTAINER_LAST
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&& e.id >= ContainerEvent.CONTAINER_FIRST)
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&& (containerListener != null
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|| (eventMask & AWTEvent.CONTAINER_EVENT_MASK) != 0))
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processEvent(e);
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else super.dispatchEventImpl(e);
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}
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public void addContainerListener(ContainerListener l)
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{
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containerListener = AWTEventMulticaster.add (containerListener, l);
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}
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public void removeContainerListener(ContainerListener l)
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{
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containerListener = AWTEventMulticaster.remove(containerListener, l);
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}
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/** @since 1.3 */
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public EventListener[] getListeners(Class listenerType)
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{
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if (listenerType == ContainerListener.class)
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return getListenersImpl(listenerType, containerListener);
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else return super.getListeners(listenerType);
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}
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protected void processEvent(AWTEvent e)
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{
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if (e instanceof ContainerEvent)
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processContainerEvent((ContainerEvent) e);
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else super.processEvent(e);
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}
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protected void processContainerEvent(ContainerEvent e)
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{
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if (containerListener == null)
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return;
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switch (e.id)
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{
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case ContainerEvent.COMPONENT_ADDED:
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containerListener.componentAdded(e);
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break;
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case ContainerEvent.COMPONENT_REMOVED:
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containerListener.componentRemoved(e);
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break;
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}
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}
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/** @deprecated */
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public void deliverEvent(Event e)
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{
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}
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public Component getComponentAt (int x, int y)
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{
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if (! contains (x, y))
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return null;
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for (int i = 0; i < ncomponents; ++i)
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{
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// Ignore invisible children...
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if (!component[i].isVisible())
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continue;
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int x2 = x - component[i].x;
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int y2 = y - component[i].y;
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if (component[i].contains (x2, y2))
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return component[i];
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}
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return this;
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}
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/** @deprecated Use getComponentAt() instead */
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public Component locate(int x, int y)
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{
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return getComponentAt(x, y);
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}
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public Component getComponentAt(Point p)
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{
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return getComponentAt(p.x, p.y);
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}
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public Component findComponentAt (int x, int y)
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{
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if (! contains (x, y))
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return null;
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for (int i = 0; i < ncomponents; ++i)
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{
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// Ignore invisible children...
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if (!component[i].isVisible())
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continue;
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int x2 = x - component[i].x;
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int y2 = y - component[i].y;
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// We don't do the contains() check right away because
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// findComponentAt would redundantly do it first thing.
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if (component[i] instanceof Container)
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{
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Container k = (Container) component[i];
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Component r = k.findComponentAt (x2, y2);
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if (r != null)
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return r;
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}
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else if (component[i].contains (x2, y2))
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return component[i];
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}
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return this;
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}
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public Component findComponentAt(Point p)
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{
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return findComponentAt(p.x, p.y);
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}
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public void addNotify ()
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{
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super.addNotify();
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}
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void addNotifyContainerChildren()
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{
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for (int i = ncomponents; --i >= 0; )
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{
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component[i].addNotify();
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if (component[i].isLightweight())
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enableEvents(component[i].eventMask);
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}
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}
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public void removeNotify()
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{
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for (int i = 0; i < ncomponents; ++i)
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component[i].removeNotify ();
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super.removeNotify();
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}
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public boolean isAncestorOf (Component comp)
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{
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for (;;)
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{
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if (comp == null)
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return false;
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if (comp == this)
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return true;
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comp = comp.getParent();
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}
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}
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protected String paramString()
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{
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String param = super.paramString();
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if (layoutMgr != null)
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param = param + "," + layoutMgr.getClass().getName();
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return param;
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}
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public void list (PrintStream out, int indent)
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{
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super.list (out, indent);
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for (int i = 0; i < ncomponents; ++i)
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component[i].list (out, indent + 2);
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}
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public void list(PrintWriter out, int indent)
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{
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super.list (out, indent);
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for (int i = 0; i < ncomponents; ++i)
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component[i].list (out, indent + 2);
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}
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/* The following classes are used in concert with the
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visitChildren() method to implement all the graphics operations
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that requires traversal of the containment hierarchy. */
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abstract static class GfxVisitor
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{
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public abstract void visit(Component c, Graphics gfx);
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}
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static class GfxPaintVisitor extends GfxVisitor
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{
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public void visit(Component c, Graphics gfx) { c.paint(gfx); }
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public static final GfxVisitor INSTANCE = new GfxPaintVisitor();
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}
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static class GfxPrintVisitor extends GfxVisitor
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{
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public void visit(Component c, Graphics gfx) { c.print(gfx); }
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public static final GfxVisitor INSTANCE = new GfxPrintVisitor();
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}
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static class GfxPaintAllVisitor extends GfxVisitor
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|
{
|
|
public void visit(Component c, Graphics gfx) { c.paintAll(gfx); }
|
|
public static final GfxVisitor INSTANCE = new GfxPaintAllVisitor();
|
|
}
|
|
|
|
static class GfxPrintAllVisitor extends GfxVisitor
|
|
{
|
|
public void visit(Component c, Graphics gfx) { c.printAll(gfx); }
|
|
public static final GfxVisitor INSTANCE = new GfxPrintAllVisitor();
|
|
}
|
|
|
|
// This is used to implement Component.transferFocus.
|
|
Component findNextFocusComponent (Component child)
|
|
{
|
|
int start, end;
|
|
if (child != null)
|
|
{
|
|
for (start = 0; start < ncomponents; ++start)
|
|
{
|
|
if (component[start] == child)
|
|
break;
|
|
}
|
|
end = start;
|
|
// This special case lets us be sure to terminate.
|
|
if (end == 0)
|
|
end = ncomponents;
|
|
++start;
|
|
}
|
|
else
|
|
{
|
|
start = 0;
|
|
end = ncomponents;
|
|
}
|
|
|
|
for (int j = start; j != end; ++j)
|
|
{
|
|
if (j >= ncomponents)
|
|
{
|
|
// The JCL says that we should wrap here. However, that
|
|
// seems wrong. To me it seems that focus order should be
|
|
// global within in given window. So instead if we reach
|
|
// the end we try to look in our parent, if we have one.
|
|
if (parent != null)
|
|
return parent.findNextFocusComponent (this);
|
|
j -= ncomponents;
|
|
}
|
|
if (component[j] instanceof Container)
|
|
{
|
|
Component c = component[j];
|
|
c = c.findNextFocusComponent (null);
|
|
if (c != null)
|
|
return c;
|
|
}
|
|
else if (component[j].isFocusTraversable ())
|
|
return component[j];
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|