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org.eclipse.swt.custom.ViewFormLayout Maven / Gradle / Ivy
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/*******************************************************************************
* 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.graphics.Rectangle;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Layout;
import org.eclipse.swt.widgets.Scrollable;
/**
* 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;
// TODO [rh] hack to fix CTabFolder layout problems
int x = rect.x + rect.width - form.marginWidth - form.highlight - 1;
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;
centerSize = computeChildSize( center, w, SWT.DEFAULT, false );
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 != -1 && form.separator != -1 ) {
// int t = Math.min( form.separator, oldSeperator );
// int b = Math.max( form.separator, oldSeperator );
// form.redraw(form.borderLeft, t, form.getSize().x - form.borderLeft -
// form.borderRight, b - t, false);
// }
}
}
