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package org.eclipse.swt.widgets;
/*
* Licensed Materials - Property of IBM,
* SWT - The Simple Widget Toolkit,
* (c) Copyright IBM Corp 1998, 1999.
*/
/**
* The tool bar class supports the layout of
* selectable tool bar items.
*
* Styles
*
* WRAP, FLAT
*
* Events
*
**/
/* Imports */
import org.eclipse.swt.internal.motif.*;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
/* Class Definition */
public /*final*/ class ToolBar extends Composite {
int drawCount, itemCount;
ToolItem [] items;
/**
* Creates a new instance of the widget.
*/
public ToolBar (Composite parent, int style) {
super (parent, checkStyle (style));
}
static int checkStyle (int style) {
/*
* Even though it is legal to create this widget
* with scroll bars, they serve no useful purpose
* because they do not automatically scroll the
* widget's client area. The fix is to clear
* the SWT style.
*/
return style & ~(SWT.H_SCROLL | SWT.V_SCROLL);
}
protected void checkSubclass () {
if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS);
}
/**
* Computes the preferred size.
*/
public Point computeSize (int wHint, int hHint, boolean changed) {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
int width = wHint, height = hHint;
if (wHint == SWT.DEFAULT) width = 0x7FFFFFFF;
if (hHint == SWT.DEFAULT) height = 0x7FFFFFFF;
int [] result = layout (width, height, false);
int border = getBorderWidth () * 2;
Point extent = new Point (result [1], result [2]);
if (wHint != SWT.DEFAULT) extent.x = wHint;
if (hHint != SWT.DEFAULT) extent.y = hHint;
extent.x += border;
extent.y += border;
return extent;
}
void createItem (ToolItem item, int index) {
if (!(0 <= index && index <= itemCount)) error (SWT.ERROR_INVALID_RANGE);
if (itemCount == items.length) {
ToolItem [] newItems = new ToolItem [itemCount + 4];
System.arraycopy (items, 0, newItems, 0, items.length);
items = newItems;
}
item.createWidget (index);
System.arraycopy (items, index, items, index + 1, itemCount++ - index);
items [index] = item;
}
void createHandle (int index) {
super.createHandle (index);
state &= ~CANVAS;
}
void createWidget (int index) {
super.createWidget (index);
items = new ToolItem [4];
itemCount = 0;
}
void destroyItem (ToolItem item) {
int index = 0;
while (index < itemCount) {
if (items [index] == item) break;
index++;
}
if (index == itemCount) return;
System.arraycopy (items, index + 1, items, index, --itemCount - index);
items [itemCount] = null;
}
public ToolItem getItem (int index) {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
ToolItem [] items = getItems ();
if (0 <= index && index < items.length) return items [index];
error (SWT.ERROR_INVALID_RANGE);
return null;
}
public ToolItem getItem (Point pt) {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
ToolItem [] items = getItems ();
for (int i=0; i<items.length; i++) {
Rectangle rect = items [i].getBounds ();
if (rect.contains (pt)) return items [i];
}
return null;
}
public int getItemCount () {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
return itemCount;
}
public ToolItem [] getItems () {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
ToolItem [] result = new ToolItem [itemCount];
System.arraycopy (items, 0, result, 0, itemCount);
return result;
}
public int getRowCount () {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
Rectangle rect = getClientArea ();
return layout (rect.width, rect.height, false) [0];
}
public int indexOf (ToolItem item) {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
if (item == null) error (SWT.ERROR_NULL_ARGUMENT);
ToolItem [] items = getItems ();
for (int i=0; i<items.length; i++) {
if (items [i] == item) return i;
}
return -1;
}
int [] layout (int nWidth, int nHeight, boolean resize) {
int xSpacing = 0, ySpacing = 4;
int marginWidth = 0, marginHeight = 0;
ToolItem [] children = getItems ();
int length = children.length;
int x = marginWidth, y = marginHeight;
int maxHeight = 0, maxX = 0, rows = 1;
boolean wrap = (style & SWT.WRAP) != 0;
for (int i=0; i<length; i++) {
ToolItem child = children [i];
Rectangle rect = child.getBounds ();
if (wrap && i != 0 && x + rect.width > nWidth) {
rows++;
x = marginWidth; y += ySpacing + maxHeight;
maxHeight = 0;
}
maxHeight = Math.max (maxHeight, rect.height);
if (resize) {
child.setBounds (x, y, rect.width, rect.height);
}
x += xSpacing + rect.width;
maxX = Math.max (maxX, x);
}
return new int [] {rows, maxX, y + maxHeight};
}
void relayout () {
if (drawCount > 0) return;
Rectangle rect = getClientArea ();
layout (rect.width, rect.height, true);
}
void relayout (int width, int height) {
if (drawCount > 0) return;
layout (width, height, true);
}
void releaseWidget () {
for (int i=0; i<itemCount; i++) {
ToolItem item = items [i];
if (!item.isDisposed ()) {
item.releaseWidget ();
item.releaseHandle ();
}
}
items = null;
super.releaseWidget ();
}
public void setBounds (int x, int y, int width, int height) {
super.setBounds (x, y, width, height);
Rectangle rect = getClientArea ();
relayout (rect.width, rect.height);
}
public void setRedraw (boolean redraw) {
if (!isValidThread ()) error (SWT.ERROR_THREAD_INVALID_ACCESS);
if (!isValidWidget ()) error (SWT.ERROR_WIDGET_DISPOSED);
if (redraw) {
if (--drawCount == 0) relayout();
} else {
drawCount++;
}
}
public void setSize (int width, int height) {
super.setSize (width, height);
Rectangle rect = getClientArea ();
relayout (rect.width, rect.height);
}
}
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