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/*******************************************************************************
* Copyright (c) 2000, 2010 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.custom;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
/**
* This class provides the layout for CTabFolder
*
* @see CTabFolder
*/
class CTabFolderLayout extends Layout {
protected Point computeSize(Composite composite, int wHint, int hHint, boolean flushCache) {
CTabFolder folder = (CTabFolder)composite;
CTabItem[] items = folder.items;
CTabFolderRenderer renderer = folder.renderer;
// preferred width of tab area to show all tabs
int tabW = 0;
int selectedIndex = folder.selectedIndex;
if (selectedIndex == -1) selectedIndex = 0;
GC gc = new GC(folder);
for (int i = 0; i < items.length; i++) {
if (folder.single) {
tabW = Math.max(tabW, renderer.computeSize(i, SWT.SELECTED, gc, SWT.DEFAULT, SWT.DEFAULT).x);
} else {
int state = 0;
if (i == selectedIndex) state |= SWT.SELECTED;
tabW += renderer.computeSize(i, state, gc, SWT.DEFAULT, SWT.DEFAULT).x;
}
}
tabW += 3;
if (folder.showMax) tabW += renderer.computeSize(CTabFolderRenderer.PART_MAX_BUTTON, SWT.NONE, gc, SWT.DEFAULT, SWT.DEFAULT).x;
if (folder.showMin) tabW += renderer.computeSize(CTabFolderRenderer.PART_MIN_BUTTON, SWT.NONE, gc, SWT.DEFAULT, SWT.DEFAULT).x;
if (folder.single) tabW += renderer.computeSize(CTabFolderRenderer.PART_CHEVRON_BUTTON, SWT.NONE, gc, SWT.DEFAULT, SWT.DEFAULT).x;
if (folder.topRight != null) {
Point pt = folder.topRight.computeSize(SWT.DEFAULT, folder.tabHeight, flushCache);
tabW += 3 + pt.x;
}
gc.dispose();
int controlW = 0;
int controlH = 0;
// preferred size of controls in tab items
for (int i = 0; i < items.length; i++) {
Control control = items[i].getControl();
if (control != null && !control.isDisposed()){
Point size = control.computeSize (wHint, hHint, flushCache);
controlW = Math.max (controlW, size.x);
controlH = Math.max (controlH, size.y);
}
}
int minWidth = Math.max(tabW, controlW);
int minHeight = (folder.minimized) ? 0 : controlH;
if (minWidth == 0) minWidth = CTabFolder.DEFAULT_WIDTH;
if (minHeight == 0) minHeight = CTabFolder.DEFAULT_HEIGHT;
if (wHint != SWT.DEFAULT) minWidth = wHint;
if (hHint != SWT.DEFAULT) minHeight = hHint;
return new Point (minWidth, minHeight);
}
protected boolean flushCache(Control control) {
return true;
}
protected void layout(Composite composite, boolean flushCache) {
CTabFolder folder = (CTabFolder)composite;
// resize content
if (folder.selectedIndex != -1) {
Control control = folder.items[folder.selectedIndex].getControl();
if (control != null && !control.isDisposed()) {
control.setBounds(folder.getClientArea());
}
}
}
}
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