| /******************************************************************************* |
| * Copyright (c) 2000, 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are 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 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| import org.eclipse.swt.internal.motif.*; |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * Instances of this class support the layout of selectable |
| * tool bar items. |
| * <p> |
| * The item children that may be added to instances of this class |
| * must be of type <code>ToolItem</code>. |
| * </p><p> |
| * Note that although this class is a subclass of <code>Composite</code>, |
| * it does not make sense to add <code>Control</code> children to it, |
| * or set a layout on it. |
| * </p><p> |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>FLAT, WRAP, RIGHT, HORIZONTAL, VERTICAL, SHADOW_OUT</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>(none)</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the styles HORIZONTAL and VERTICAL may be specified. |
| * </p><p> |
| * IMPORTANT: This class is <em>not</em> intended to be subclassed. |
| * </p> |
| */ |
| public class ToolBar extends Composite { |
| int drawCount, itemCount; |
| ToolItem [] items; |
| ToolItem lastFocus; |
| /** |
| * Constructs a new instance of this class given its parent |
| * and a style value describing its behavior and appearance. |
| * <p> |
| * The style value is either one of the style constants defined in |
| * class <code>SWT</code> which is applicable to instances of this |
| * class, or must be built by <em>bitwise OR</em>'ing together |
| * (that is, using the <code>int</code> "|" operator) two or more |
| * of those <code>SWT</code> style constants. The class description |
| * lists the style constants that are applicable to the class. |
| * Style bits are also inherited from superclasses. |
| * </p> |
| * |
| * @param parent a composite control which will be the parent of the new instance (cannot be null) |
| * @param style the style of control to construct |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the parent is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li> |
| * <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> |
| * </ul> |
| * |
| * @see SWT#FLAT |
| * @see SWT#WRAP |
| * @see SWT#RIGHT |
| * @see SWT#HORIZONTAL |
| * @see SWT#SHADOW_OUT |
| * @see SWT#VERTICAL |
| * @see Widget#checkSubclass() |
| * @see Widget#getStyle() |
| */ |
| public ToolBar (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| |
| /* |
| * Ensure that either HORIZONTAL or VERTICAL is set. |
| * NOTE: HORIZONTAL and VERTICAL have the same values |
| * as H_SCROLL and V_SCROLL so it is necessary to first |
| * clear these bits to avoid scroll bars and then reset |
| * the bits using the original style supplied by the |
| * programmer. |
| */ |
| if ((style & SWT.VERTICAL) != 0) { |
| this.style |= SWT.VERTICAL; |
| } else { |
| this.style |= SWT.HORIZONTAL; |
| } |
| } |
| 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); |
| } |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| 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 createHandle (int index) { |
| super.createHandle (index); |
| state &= ~CANVAS; |
| } |
| 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 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 boolean forceFocus () { |
| checkWidget (); |
| Decorations shell = menuShell (); |
| shell.setSavedFocus (this); |
| shell.bringToTop (false); |
| if (lastFocus != null && lastFocus.setFocus ()) return true; |
| for (int i = 0; i < itemCount; i++) { |
| ToolItem item = items [i]; |
| if (item.setFocus ()) return true; |
| } |
| return super.forceFocus (); |
| } |
| /** |
| * Returns the item at the given, zero-relative index in the |
| * receiver. Throws an exception if the index is out of range. |
| * |
| * @param index the index of the item to return |
| * @return the item at the given index |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public ToolItem getItem (int index) { |
| checkWidget(); |
| ToolItem [] items = getItems (); |
| if (0 <= index && index < items.length) return items [index]; |
| error (SWT.ERROR_INVALID_RANGE); |
| return null; |
| } |
| |
| /** |
| * Returns the item at the given point in the receiver |
| * or null if no such item exists. The point is in the |
| * coordinate system of the receiver. |
| * |
| * @param point the point used to locate the item |
| * @return the item at the given point |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the point is null</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public ToolItem getItem (Point pt) { |
| checkWidget(); |
| if (pt == null) error (SWT.ERROR_NULL_ARGUMENT); |
| 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; |
| } |
| |
| /** |
| * Returns the number of items contained in the receiver. |
| * |
| * @return the number of items |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getItemCount () { |
| checkWidget(); |
| return itemCount; |
| } |
| /** |
| * Returns an array of <code>ToolItem</code>s which are the items |
| * in the receiver. |
| * <p> |
| * Note: This is not the actual structure used by the receiver |
| * to maintain its list of items, so modifying the array will |
| * not affect the receiver. |
| * </p> |
| * |
| * @return the items in the receiver |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public ToolItem [] getItems () { |
| checkWidget(); |
| ToolItem [] result = new ToolItem [itemCount]; |
| System.arraycopy (items, 0, result, 0, itemCount); |
| return result; |
| } |
| /** |
| * Returns the number of rows in the receiver. When |
| * the receiver has the <code>WRAP</code> style, the |
| * number of rows can be greater than one. Otherwise, |
| * the number of rows is always one. |
| * |
| * @return the number of items |
| * |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int getRowCount () { |
| checkWidget(); |
| Rectangle rect = getClientArea (); |
| return layout (rect.width, rect.height, false) [0]; |
| } |
| /** |
| * Searches the receiver's list starting at the first item |
| * (index 0) until an item is found that is equal to the |
| * argument, and returns the index of that item. If no item |
| * is found, returns -1. |
| * |
| * @param item the search item |
| * @return the index of the item |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the tool item is null</li> |
| * <li>ERROR_INVALID_ARGUMENT - if the tool item has been disposed</li> |
| * </ul> |
| * @exception SWTException <ul> |
| * <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li> |
| * <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li> |
| * </ul> |
| */ |
| public int indexOf (ToolItem item) { |
| checkWidget(); |
| if (item == null) error (SWT.ERROR_NULL_ARGUMENT); |
| if (item.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT); |
| ToolItem [] items = getItems (); |
| for (int i=0; i<items.length; i++) { |
| if (items [i] == item) return i; |
| } |
| return -1; |
| } |
| int [] layoutHorizontal (int nWidth, int nHeight, boolean resize) { |
| int xSpacing = 0, ySpacing = (style & SWT.NO_FOCUS) != 0 ? 4 : 2; |
| 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}; |
| } |
| int [] layoutVertical (int nWidth, int nHeight, boolean resize) { |
| int xSpacing = (style & SWT.NO_FOCUS) != 0 ? 4 : 2, ySpacing = 0; |
| int marginWidth = 0, marginHeight = 0; |
| ToolItem [] children = getItems (); |
| int length = children.length; |
| int x = marginWidth, y = marginHeight; |
| int maxWidth = 0, maxY = 0, cols = 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 && y + rect.height > nHeight) { |
| cols++; |
| x += xSpacing + maxWidth; y = marginHeight; |
| maxWidth = 0; |
| } |
| maxWidth = Math.max (maxWidth, rect.width); |
| if (resize) { |
| child.setBounds (x, y, rect.width, rect.height); |
| } |
| y += ySpacing + rect.height; |
| maxY = Math.max (maxY, y); |
| } |
| return new int [] {cols, x + maxWidth, maxY}; |
| } |
| int [] layout (int nWidth, int nHeight, boolean resize) { |
| if ((style & SWT.VERTICAL) != 0) { |
| return layoutVertical (nWidth, nHeight, resize); |
| } else { |
| return layoutHorizontal (nWidth, nHeight, resize); |
| } |
| } |
| boolean mnemonicHit (char key) { |
| for (int i = 0; i < items.length; i++) { |
| ToolItem item = items [i]; |
| if (item != null) { |
| char mnemonic = findMnemonic (item.getText ()); |
| if (mnemonic != '\0') { |
| if (Character.toUpperCase (key) == Character.toUpperCase (mnemonic)) { |
| XmProcessTraversal (item.handle, OS.XmTRAVERSE_CURRENT); |
| item.click (false, 0); |
| return true; |
| } |
| } |
| } |
| } |
| return false; |
| } |
| boolean mnemonicMatch (char key) { |
| for (int i = 0; i < items.length; i++) { |
| ToolItem item = items [i]; |
| if (item != null && item.getEnabled ()) { |
| char mnemonic = findMnemonic (item.getText ()); |
| if (mnemonic != '\0') { |
| if (Character.toUpperCase (key) == Character.toUpperCase (mnemonic)) { |
| return true; |
| } |
| } |
| } |
| } |
| return false; |
| } |
| void propagateWidget (boolean enabled) { |
| super.propagateWidget (enabled); |
| for (int i=0; i<itemCount; i++) { |
| items [i].propagateWidget (enabled); |
| } |
| } |
| 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.releaseResources (); |
| } |
| items = null; |
| super.releaseWidget (); |
| } |
| void setBackgroundPixel (int pixel) { |
| super.setBackgroundPixel (pixel); |
| for (int i = 0; i < items.length; i++) { |
| if (items[i] != null) { |
| items[i].setBackgroundPixel (pixel); |
| } |
| } |
| } |
| boolean setBounds (int x, int y, int width, int height, boolean move, boolean resize) { |
| boolean changed = super.setBounds (x, y, width, height, move, resize); |
| if (changed && resize) { |
| Rectangle rect = getClientArea (); |
| relayout (rect.width, rect.height); |
| } |
| return changed; |
| } |
| public void setFont (Font font) { |
| checkWidget(); |
| super.setFont (font); |
| for (int i=0; i<items.length; i++) { |
| ToolItem item = items [i]; |
| if (item != null) { |
| Point size = item.computeSize (); |
| item.setSize (size.x, size.y, false); |
| } |
| } |
| relayout (); |
| } |
| void setForegroundPixel (int pixel) { |
| super.setForegroundPixel (pixel); |
| for (int i = 0; i < items.length; i++) { |
| if (items[i] != null) { |
| items[i].setForegroundPixel (pixel); |
| } |
| } |
| } |
| public void setRedraw (boolean redraw) { |
| checkWidget(); |
| if (redraw) { |
| if (--drawCount == 0) relayout(); |
| } else { |
| drawCount++; |
| } |
| } |
| boolean setTabItemFocus (boolean next) { |
| int index = 0; |
| while (index < items.length) { |
| ToolItem item = items [index]; |
| if (item != null && (item.style & SWT.SEPARATOR) == 0) { |
| if (item.getEnabled ()) break; |
| } |
| index++; |
| } |
| if (index == items.length) return false; |
| return super.setTabItemFocus (next); |
| } |
| int traversalCode (int key, XKeyEvent xEvent) { |
| return super.traversalCode (key, xEvent) | SWT.TRAVERSE_MNEMONIC; |
| } |
| int xFocusIn (XFocusChangeEvent xEvent) { |
| int newFocus = OS.XmGetFocusWidget (handle); |
| if (newFocus != focusHandle ()) { |
| /* a child ToolItem has received focus */ |
| for (int i = 0; i < itemCount; i++) { |
| if (items [i].handle == newFocus) { |
| lastFocus = items [i]; |
| break; |
| } |
| } |
| } |
| return super.xFocusIn (xEvent); |
| } |
| } |