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/******************************************************************************* |
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* Copyright (c) 2004 IBM Corporation and others. |
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* All rights reserved. This program and the accompanying materials |
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* are made available under the terms of the Common Public License v1.0 |
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* which accompanies this distribution, and is available at |
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* http://www.eclipse.org/legal/cpl-v10.html |
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* |
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* Contributors: |
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* IBM Corporation - initial API and implementation |
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*******************************************************************************/ |
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package org.eclipse.ui.internal.presentations; |
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|
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import org.eclipse.jface.util.Geometry; |
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import org.eclipse.swt.SWT; |
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import org.eclipse.swt.custom.CTabFolder; |
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import org.eclipse.swt.custom.CTabItem; |
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import org.eclipse.swt.graphics.Point; |
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import org.eclipse.swt.graphics.Rectangle; |
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import org.eclipse.swt.widgets.Control; |
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|
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/** |
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* Arranges the contents of a CTabFolder |
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* |
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* @since 3.0 |
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*/ |
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public class TabFolderLayout { |
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private CTabFolder tabFolder; |
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private Control[] topControls; |
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//private Control upperRightProxy; |
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private LayoutCache cache; |
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private Rectangle centerArea = new Rectangle(0,0,0,0); |
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private int trimStart; |
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|
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public TabFolderLayout(CTabFolder folder) { |
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this.tabFolder = folder; |
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// Composite cmp = new Composite(folder, SWT.DEFAULT); |
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// upperRightProxy = cmp; |
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// upperRightProxy.setVisible(false); |
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// |
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// cmp.setLayout(new Layout() { |
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// |
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// protected Point computeSize(Composite composite, int wHint, int hHint, boolean flushCache) { |
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// return new Point(10,10); |
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// } |
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// |
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// protected void layout(Composite composite, boolean flushCache) { |
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// |
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// } |
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// }); |
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|
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//tabFolder.setTopRight(upperRightProxy); |
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setTopRight(new Control[0]); |
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} |
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public void dispose() { |
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//tabFolder.setTopRight(null); |
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//upperRightProxy.dispose(); |
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} |
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|
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public Rectangle getClientBounds() { |
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return centerArea; |
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} |
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|
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public int getTrimStart() { |
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return trimStart; |
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} |
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|
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/** |
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* Sets the list of controls to be placed at the top-right of the CTabFolder |
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* |
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* @param topRight a list of Control |
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*/ |
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public void setTopRight(Control[] upperRight) { |
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topControls = upperRight; |
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|
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cache = new LayoutCache(upperRight); |
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layout(); |
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} |
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|
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/** |
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* Arranges all the controls in this layout |
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*/ |
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public void layout() { |
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cache.flush(); |
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if (topControls.length == 0) { |
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tabFolder.setTopRight(null); |
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} |
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// DragUtil.getDisplayBounds(tabFolder); |
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// |
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// displayBounds.height = tabFolder.getTabHeight(); |
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// displayBounds.x = displayBounds.x + displayBounds.width - 30; |
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// displayBounds.width = 30; |
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|
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int trimWidth = computeTrimWidth(); |
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int available = getAvailableSpace(tabFolder); |
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Rectangle clientBounds = calculatePageBounds(tabFolder); |
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Rectangle bounds = tabFolder.getBounds(); |
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trimStart = bounds.x + bounds.width; |
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// Check if we have room for all our topRight controls on the top border |
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if (available >= trimWidth) { |
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//upperRightProxy.setSize(0, 0); |
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//tabFolder.setTopRight(upperRightProxy); |
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Rectangle displayBounds = //DragUtil.getDisplayBounds(upperRightProxy); |
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Geometry.toDisplay(tabFolder, tabFolder.getMinimizeBounds()); |
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//displayBounds.height = tabFolder.getTabHeight(); |
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displayBounds.width = 0; |
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displayBounds.y --; |
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displayBounds.height += 2; |
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Rectangle targetBounds = Geometry.toControl(tabFolder.getParent(), displayBounds); |
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targetBounds.x = targetBounds.x + targetBounds.width - trimWidth; |
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Rectangle currentRectangle = new Rectangle(targetBounds.x, targetBounds.y, 0, targetBounds.height); |
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trimStart = targetBounds.x; |
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for (int idx = 0; idx < topControls.length; idx++) { |
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Point nextSize = cache.computeSize(idx, SWT.DEFAULT, SWT.DEFAULT); |
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currentRectangle.width = nextSize.x; |
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//currentRectangle.height = nextSize.y; |
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//topControls[idx].moveAbove(null); |
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topControls[idx].setBounds(currentRectangle); |
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currentRectangle.x += currentRectangle.width; |
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} |
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centerArea = Geometry.copy(clientBounds); |
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return; |
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} |
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//tabFolder.setTopRight(null); |
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// Else we need to place the controls below the title |
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int y = clientBounds.y; |
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int x = clientBounds.x + clientBounds.width; |
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|
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int rowHeight = 0; |
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for (int idx = 0; idx < topControls.length; idx++) { |
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Point nextSize = cache.computeSize(idx, SWT.DEFAULT, SWT.DEFAULT); |
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|
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if (nextSize.x < clientBounds.width) { |
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topControls[idx].setBounds(x - nextSize.x, y, nextSize.x, nextSize.y); |
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rowHeight = Math.max(rowHeight, nextSize.y); |
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x -= nextSize.x; |
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} else { |
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y += rowHeight; |
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x = clientBounds.x; |
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rowHeight = 0; |
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nextSize = cache.computeSize(idx, clientBounds.width, SWT.DEFAULT); |
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topControls[idx].setBounds(x, y, nextSize.x, nextSize.y); |
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y += nextSize.y; |
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} |
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} |
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y += rowHeight; |
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centerArea = new Rectangle(clientBounds.x, y, clientBounds.width, |
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clientBounds.height + clientBounds.y - y); |
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} |
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|
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/** |
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* Computes the maximium size available for the trim controls without causing |
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* tabs to disappear. |
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* |
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* @param folder |
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* @return the amount of empty space to the right of the tabs |
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*/ |
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protected static int getAvailableSpace(CTabFolder folder) { |
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int available = folder.getBounds().width; |
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available -= 2 * folder.getBorderWidth(); |
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available -= folder.getChevronBounds().width; |
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available -= folder.getMaximizeBounds().width; |
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available -= folder.getMinimizeBounds().width; |
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// Add a safety margin to avoid stomping on the curve |
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available -= 10; |
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CTabItem[] tabs = folder.getItems(); |
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for (int idx = 0; idx < tabs.length; idx++) { |
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CTabItem item = tabs[idx]; |
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if (!item.isShowing()) { |
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return 0; |
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} |
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available -= item.getBounds().width; |
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} |
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return Math.max(0, available); |
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} |
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|
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/** |
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* Returns the total preferred width of the top controls |
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* |
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* @return the total preferred width of the top controls |
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*/ |
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protected int computeTrimWidth() { |
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int width = 0; |
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for (int idx = 0; idx < topControls.length; idx++) { |
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width += cache.computeSize(idx, SWT.DEFAULT, SWT.DEFAULT).x; |
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} |
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return width; |
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} |
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private static Rectangle calculatePageBounds(CTabFolder folder) { |
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if (folder == null) |
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return new Rectangle(0, 0, 0, 0); |
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Rectangle bounds = folder.getBounds(); |
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Rectangle offset = folder.getClientArea(); |
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bounds.x += offset.x; |
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bounds.y += offset.y; |
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bounds.width = offset.width; |
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bounds.height = offset.height; |
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return bounds; |
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} |
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|
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} |
