/*******************************************************************************
* Copyright (c) 2000, 2009 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 ViewForm
*
* @see ViewForm
*/
class ViewFormLayout extends Layout {
protected Point computeSize(Composite composite, int wHint, int hHint, boolean flushCache) {
ViewForm form = (ViewForm)composite;
Control left = form.topLeft;
Control center = form.topCenter;
Control right = form.topRight;
Control content = form.content;
Point leftSize = new Point(0, 0);
if (left != null) {
leftSize = computeChildSize(left, SWT.DEFAULT, SWT.DEFAULT, flushCache);
}
Point centerSize = new Point(0, 0);
if (center != null) {
centerSize = computeChildSize(center, SWT.DEFAULT, SWT.DEFAULT, flushCache);
}
Point rightSize = new Point(0, 0);
if (right != null) {
rightSize = computeChildSize(right, SWT.DEFAULT, SWT.DEFAULT, flushCache);
}
Point size = new Point(0, 0);
// calculate width of title bar
if (form.separateTopCenter ||
(wHint != SWT.DEFAULT && leftSize.x + centerSize.x + rightSize.x > wHint)) {
size.x = leftSize.x + rightSize.x;
if (leftSize.x > 0 && rightSize.x > 0) size.x += form.horizontalSpacing;
size.x = Math.max(centerSize.x, size.x);
size.y = Math.max(leftSize.y, rightSize.y);
if (center != null){
size.y += centerSize.y;
if (left != null ||right != null)size.y += form.verticalSpacing;
}
} else {
size.x = leftSize.x + centerSize.x + rightSize.x;
int count = -1;
if (leftSize.x > 0) count++;
if (centerSize.x > 0) count++;
if (rightSize.x > 0) count++;
if (count > 0) size.x += count * form.horizontalSpacing;
size.y = Math.max(leftSize.y, Math.max(centerSize.y, rightSize.y));
}
if (content != null) {
if (left != null || right != null || center != null) size.y += 1; // allow space for a vertical separator
Point contentSize = new Point(0, 0);
contentSize = computeChildSize(content, SWT.DEFAULT, SWT.DEFAULT, flushCache);
size.x = Math.max (size.x, contentSize.x);
size.y += contentSize.y;
if (size.y > contentSize.y) size.y += form.verticalSpacing;
}
size.x += 2*form.marginWidth;
size.y += 2*form.marginHeight;
if (wHint != SWT.DEFAULT) size.x = wHint;
if (hHint != SWT.DEFAULT) size.y = hHint;
return size;
}
Point computeChildSize(Control control, int wHint, int hHint, boolean flushCache) {
Object data = control.getLayoutData();
if (data == null || !(data instanceof CLayoutData)) {
data = new CLayoutData();
control.setLayoutData(data);
}
return ((CLayoutData)data).computeSize(control, wHint, hHint, flushCache);
}
int computeTrim(Control c) {
if (c instanceof Scrollable) {
Rectangle rect = ((Scrollable) c).computeTrim (0, 0, 0, 0);
return rect.width;
}
return c.getBorderWidth () * 2;
}
protected boolean flushCache(Control control) {
Object data = control.getLayoutData();
if (data != null && data instanceof CLayoutData) ((CLayoutData)data).flushCache();
return true;
}
protected void layout(Composite composite, boolean flushCache) {
ViewForm form = (ViewForm)composite;
Control left = form.topLeft;
Control center = form.topCenter;
Control right = form.topRight;
Control content = form.content;
Rectangle rect = composite.getClientArea();
Point leftSize = new Point(0, 0);
if (left != null && !left.isDisposed()) {
leftSize = computeChildSize(left, SWT.DEFAULT, SWT.DEFAULT, flushCache);
}
Point centerSize = new Point(0, 0);
if (center != null && !center.isDisposed()) {
centerSize = computeChildSize(center, SWT.DEFAULT, SWT.DEFAULT, flushCache);
}
Point rightSize = new Point(0, 0);
if (right != null && !right.isDisposed()) {
rightSize = computeChildSize(right, SWT.DEFAULT, SWT.DEFAULT, flushCache);
}
int minTopWidth = leftSize.x + centerSize.x + rightSize.x + 2*form.marginWidth + 2*form.highlight;
int count = -1;
if (leftSize.x > 0) count++;
if (centerSize.x > 0) count++;
if (rightSize.x > 0) count++;
if (count > 0) minTopWidth += count * form.horizontalSpacing;
int x = rect.x + rect.width - form.marginWidth - form.highlight;
int y = rect.y + form.marginHeight + form.highlight;
boolean top = false;
if (form.separateTopCenter || minTopWidth > rect.width) {
int topHeight = Math.max(rightSize.y, leftSize.y);
if (right != null && !right.isDisposed()) {
top = true;
x -= rightSize.x;
right.setBounds(x, y, rightSize.x, topHeight);
x -= form.horizontalSpacing;
}
if (left != null && !left.isDisposed()) {
top = true;
int trim = computeTrim(left);
int leftW = x - rect.x - form.marginWidth - form.highlight - trim;
leftSize = computeChildSize(left, leftW, SWT.DEFAULT, false);
left.setBounds(rect.x + form.marginWidth + form.highlight, y, leftSize.x, topHeight);
}
if (top) y += topHeight + form.verticalSpacing;
if (center != null && !center.isDisposed()) {
top = true;
int trim = computeTrim(center);
int w = rect.width - 2*form.marginWidth - 2*form.highlight - trim;
Point size = computeChildSize(center, w, SWT.DEFAULT, false);
if (size.x < centerSize.x) {
centerSize = size;
}
center.setBounds(rect.x + rect.width - form.marginWidth - form.highlight - centerSize.x, y, centerSize.x, centerSize.y);
y += centerSize.y + form.verticalSpacing;
}
} else {
int topHeight = Math.max(rightSize.y, Math.max(centerSize.y, leftSize.y));
if (right != null && !right.isDisposed()) {
top = true;
x -= rightSize.x;
right.setBounds(x, y, rightSize.x, topHeight);
x -= form.horizontalSpacing;
}
if (center != null && !center.isDisposed()) {
top = true;
x -= centerSize.x;
center.setBounds(x, y, centerSize.x, topHeight);
x -= form.horizontalSpacing;
}
if (left != null && !left.isDisposed()) {
top = true;
Rectangle trim = left instanceof Composite ? ((Composite)left).computeTrim(0, 0, 0, 0) : new Rectangle(0, 0, 0, 0);
int w = x - rect.x - form.marginWidth - form.highlight - trim.width;
int h = topHeight - trim.height;
leftSize = computeChildSize(left, w, h, false);
left.setBounds(rect.x + form.marginWidth + form.highlight, y, leftSize.x, topHeight);
}
if (top)y += topHeight + form.verticalSpacing;
}
int oldSeperator = form.separator;
form.separator = -1;
if (content != null && !content.isDisposed()) {
if (left != null || right!= null || center != null){
form.separator = y;
y++;
}
content.setBounds(rect.x + form.marginWidth + form.highlight, y, rect.width - 2 * form.marginWidth - 2*form.highlight, rect.y + rect.height - y - form.marginHeight - form.highlight);
}
if (oldSeperator != form.separator) {
int t, b;
if (oldSeperator == -1) {
t = form.separator;
b = form.separator + 1;
} else if (form.separator == -1) {
t = oldSeperator;
b = oldSeperator + 1;
} else {
t = Math.min(form.separator, oldSeperator);
b = Math.max(form.separator, oldSeperator);
}
form.redraw(form.borderLeft, t, form.getSize().x - form.borderLeft - form.borderRight, b - t, false);
}
}
}
