org.eclipse.swt.custom.CTabFolderLayout Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2000, 2005 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.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Layout;
/**
* 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;
CTabItem[] items = folder.getItems();
// preferred width of tab area to show all tabs
int tabW = 0;
// GC gc = new GC(folder);
for (int i = 0; i < items.length; i++) {
if (folder.single) {
// tabW = Math.max(tabW, items[i].preferredWidth(gc, true, false));
tabW = Math.max(tabW, items[i].preferredWidth(true, false));
} else {
// tabW += items[i].preferredWidth(gc, i == folder.selectedIndex, false);
tabW += items[i].preferredWidth(i == folder.selectedIndex, false);
}
}
// gc.dispose();
tabW += 3;
if (folder.showMax) tabW += CTabFolder.BUTTON_SIZE;
if (folder.showMin) tabW += CTabFolder.BUTTON_SIZE;
if (folder.single) tabW += 3*CTabFolder.BUTTON_SIZE/2; //chevron
if (folder.topRight != null) {
Point pt = folder.topRight.computeSize(SWT.DEFAULT, folder.tabHeight, flushCache);
tabW += 3 + pt.x;
}
// if (!folder.single && !folder.simple) tabW += folder.curveWidth - 2*folder.curveIndent;
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();
Control control = folder.getItem( folder.selectedIndex ).getControl();
if (control != null && !control.isDisposed()) {
control.setBounds(folder.getClientArea());
}
}
}
}