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package org.eclipse.swt.widgets;
/*
* Copyright (c) 2000, 2002 IBM Corp. All rights reserved.
* This file is made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.*;
public class Composite extends Scrollable {
Layout layout;
Control[] tabList;
Composite () {
/* Do nothing */
}
public Composite (Composite parent, int style) {
super (parent, style);
}
Control [] _getChildren () {
return new Control [0];
}
Control [] _getTabList () {
if (tabList == null) return null;
// ensure to return only non-disposed controls
int count = 0;
for (int i=0; i<tabList.length; i++) {
if (!tabList [i].isDisposed ()) count++;
}
if (count == tabList.length) return tabList;
// copy only non-disposed controls
Control [] newList = new Control [count];
int index = 0;
for (int i=0; i<tabList.length; i++) {
if (!tabList [i].isDisposed ()) {
newList [index++] = tabList [i];
}
}
tabList = newList;
return tabList;
}
public Point computeSize (int wHint, int hHint, boolean changed) {
checkWidget();
return new Point (0, 0);
}
protected void checkSubclass () {
/* Do nothing - Subclassing is allowed */
}
Control [] computeTabList () {
Control result [] = super.computeTabList ();
if (result.length == 0) return result;
Control [] list = tabList != null ? _getTabList () : _getChildren ();
for (int i=0; i<list.length; i++) {
Control child = list [i];
Control [] childList = child.computeTabList ();
if (childList.length != 0) {
Control [] newResult = new Control [result.length + childList.length];
System.arraycopy (result, 0, newResult, 0, result.length);
System.arraycopy (childList, 0, newResult, result.length, childList.length);
result = newResult;
}
}
return result;
}
void createHandle (int index) {
state |= HANDLE | CANVAS;
}
public Control [] getChildren () {
checkWidget();
return _getChildren ();
}
public Layout getLayout () {
checkWidget();
return layout;
}
public Control [] getTabList () {
checkWidget ();
Control [] tabList = _getTabList ();
if (tabList == null) {
int count = 0;
Control [] list =_getChildren ();
for (int i=0; i<list.length; i++) {
if (list [i].isTabGroup ()) count++;
}
tabList = new Control [count];
int index = 0;
for (int i=0; i<list.length; i++) {
if (list [i].isTabGroup ()) {
tabList [index++] = list [i];
}
}
}
return tabList;
}
boolean hooksKeys () {
return hooks (SWT.KeyDown) || hooks (SWT.KeyUp) || hooks (SWT.Traverse);
}
public void layout () {
checkWidget();
layout (true);
}
public void layout (boolean changed) {
checkWidget();
if (layout == null) return;
//int count = getChildrenCount ();
//if (count == 0) return;
layout.layout (this, changed);
}
void redrawWidget (int x, int y, int width, int height, boolean all) {
super.redrawWidget (x, y, width, height, all);
}
void releaseChildren () {
Control [] children = _getChildren ();
for (int i=0; i<children.length; i++) {
Control child = children [i];
if (!child.isDisposed ()) {
child.releaseWidget ();
child.releaseHandle ();
}
}
}
void releaseWidget () {
releaseChildren ();
super.releaseWidget ();
layout = null;
tabList = null;
}
void setBackgroundPixel (int pixel) {
super.setBackgroundPixel (pixel);
}
public void setBounds (int x, int y, int width, int height) {
super.setBounds (x, y, width, height);
if (layout != null) layout (false);
}
public boolean setFocus() {
checkWidget ();
if ((style & SWT.NO_FOCUS) != 0) return false;
Control [] children = _getChildren ();
for (int i= 0; i < children.length; i++) {
Control child = children [i];
if (child.setFocus ()) return true;
}
return super.setFocus ();
}
public void setLayout (Layout layout) {
checkWidget();
this.layout = layout;
}
public void setSize (int width, int height) {
super.setSize (width, height);
if (layout != null) layout (false);
}
public void setTabList (Control [] tabList) {
checkWidget ();
if (tabList != null) {
for (int i=0; i<tabList.length; i++) {
Control control = tabList [i];
if (control == null) error (SWT.ERROR_INVALID_ARGUMENT);
if (control.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT);
/*
* This code is intentionally commented.
* Tab lists are currently only supported
* for the direct children of a composite.
*/
// Shell shell = control.getShell ();
// while (control != shell && control != this) {
// control = control.parent;
// }
// if (control != this) error (SWT.ERROR_INVALID_PARENT);
if (control.parent != this) error (SWT.ERROR_INVALID_PARENT);
}
Control [] newList = new Control [tabList.length];
System.arraycopy (tabList, 0, newList, 0, tabList.length);
tabList = newList;
}
this.tabList = tabList;
}
}
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