/*******************************************************************************
* Copyright (c) 2000, 2008 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
* Tom Schindl<tom.schindl@bestsolution.at> - ported to JavaFX
*******************************************************************************/
package at.bestsolution.efxclipse.runtime.panels;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.value.WritableBooleanValue;
import javafx.beans.value.WritableIntegerValue;
import javafx.geometry.Bounds;
import javafx.scene.Node;
public class FillLayoutPane extends AbstractLayoutPane<FillLayoutPane.FillData> {
/**
* type specifies how controls will be positioned within the layout.
*
* The default value is HORIZONTAL.
*
* Possible values are:
* <ul>
* <li>HORIZONTAL: Position the controls horizontally from left to right</li>
* <li>VERTICAL: Position the controls vertically from top to bottom</li>
* </ul>
*/
private WritableBooleanValue horizontal = new SimpleBooleanProperty(this,
"horizontal", true);
/**
* marginWidth specifies the number of pixels of horizontal margin that will
* be placed along the left and right edges of the layout.
*
* The default value is 0.
*
* @since 3.0
*/
private WritableIntegerValue marginWidth = new SimpleIntegerProperty(this,
"marginWidth", 0);
/**
* marginHeight specifies the number of pixels of vertical margin that will
* be placed along the top and bottom edges of the layout.
*
* The default value is 0.
*
* @since 3.0
*/
private WritableIntegerValue marginHeight = new SimpleIntegerProperty(this,
"marginHeight", 0);
/**
* spacing specifies the number of pixels between the edge of one cell and
* the edge of its neighbouring cell.
*
* The default value is 0.
*
* @since 3.0
*/
private WritableIntegerValue spacing = new SimpleIntegerProperty(this,
"spacing", 0);
static class FillData {
double defaultWidth = -1, defaultHeight = -1;
double currentWhint, currentHhint, currentWidth = -1,
currentHeight = -1;
Size computeSize(Node control, double wHint, double hHint,
boolean flushCache) {
if (flushCache)
flushCache();
if (wHint == SWT_DEFAULT && hHint == SWT_DEFAULT) {
if (defaultWidth == -1 || defaultHeight == -1) {
// Size size = computeSize (wHint, hHint, flushCache);
defaultWidth = control.prefWidth(hHint);
defaultHeight = control.prefHeight(wHint);
}
return new Size(defaultWidth, defaultHeight);
}
if (currentWidth == -1 || currentHeight == -1
|| wHint != currentWhint || hHint != currentHhint) {
// Point size = control.computeSize (wHint, hHint, flushCache);
currentWhint = wHint;
currentHhint = hHint;
currentWidth = control.getLayoutBounds().getWidth();
currentHeight = control.getLayoutBounds().getHeight();
}
return new Size(currentWidth, currentHeight);
}
void flushCache() {
defaultWidth = defaultHeight = -1;
currentWidth = currentHeight = -1;
}
}
public void setMarginHeight(int marginHeight) {
this.marginHeight.set(marginHeight);
}
public int getMarginHeight() {
return this.marginHeight.get();
}
public void setMarginWidth(int marginWidth) {
this.marginWidth.set(marginWidth);
}
public int getMarginWidth() {
return this.marginWidth.get();
}
public void setHorizontal(boolean horizontal) {
this.horizontal.set(horizontal);
}
public boolean isHorizontal() {
return this.horizontal.get();
}
public WritableIntegerValue marginHeight() {
return marginHeight;
}
public WritableIntegerValue marginWidth() {
return marginWidth;
}
public WritableBooleanValue horizontal() {
return horizontal;
}
protected Size computeSize(double wHint, double hHint, boolean flushCache) {
Node[] children = getChildren().toArray(new Node[0]);
int count = children.length;
double maxWidth = 0, maxHeight = 0;
for (int i = 0; i < count; i++) {
Node child = children[i];
double w = wHint, h = hHint;
if (count > 0) {
if (horizontal.get() && wHint != SWT_DEFAULT) {
w = Math.max(0, (wHint - (count - 1) * spacing.get())
/ count);
}
if (!horizontal.get() && hHint != SWT_DEFAULT) {
h = Math.max(0, (hHint - (count - 1) * spacing.get())
/ count);
}
}
Size size = computeChildSize(child, w, h, flushCache);
maxWidth = Math.max(maxWidth, size.width);
maxHeight = Math.max(maxHeight, size.height);
}
double width = 0, height = 0;
if (horizontal.get()) {
width = count * maxWidth;
if (count != 0)
width += (count - 1) * spacing.get();
height = maxHeight;
} else {
width = maxWidth;
height = count * maxHeight;
if (count != 0)
height += (count - 1) * spacing.get();
}
width += marginWidth.get() * 2;
height += marginHeight.get() * 2;
if (wHint != SWT_DEFAULT)
width = wHint;
if (hHint != SWT_DEFAULT)
height = hHint;
return new Size(width, height);
}
Size computeChildSize(Node control, double wHint, double hHint,
boolean flushCache) {
FillData data = getConstraint(control);
if (data == null) {
data = new FillData();
setConstraint(control, data);
}
Size size = null;
if (wHint == SWT_DEFAULT && hHint == SWT_DEFAULT) {
size = data.computeSize(control, wHint, hHint, flushCache);
} else {
// TEMPORARY CODE
int trimX, trimY;
trimX = trimY = 0;
//FIXME
// if (control instanceof Scrollable) {
// Rectangle rect = ((Scrollable) control).computeTrim(0, 0, 0, 0);
// trimX = rect.width;
// trimY = rect.height;
// } else {
// trimX = trimY = control.getBorderWidth() * 2;
// }
double w = wHint == SWT_DEFAULT ? wHint : Math
.max(0, wHint - trimX);
double h = hHint == SWT_DEFAULT ? hHint : Math
.max(0, hHint - trimY);
size = data.computeSize(control, w, h, flushCache);
}
return size;
}
@Override
protected void layoutChildren() {
super.layoutChildren();
Bounds rect = getLayoutBounds();
Node [] children = getChildren ().toArray(new Node[0]);
int count = children.length;
if (count == 0) return;
double width = rect.getWidth() - marginWidth.get() * 2;
double height = rect.getHeight() - marginHeight.get() * 2;
if (horizontal.get()) {
width -= (count - 1) * spacing.get();
double x = rect.getMinX() + marginWidth.get(), extra = width % count;
double y = rect.getMinY() + marginHeight.get(), cellWidth = width / count;
for (int i=0; i<count; i++) {
Node child = children [i];
double childWidth = cellWidth;
if (i == 0) {
childWidth += extra / 2;
} else {
if (i == count - 1) childWidth += (extra + 1) / 2;
}
child.resizeRelocate(x, y, childWidth, height);
x += childWidth + spacing.get();
}
} else {
height -= (count - 1) * spacing.get();
double x = rect.getMinX() + marginWidth.get(), cellHeight = height / count;
double y = rect.getMinY() + marginHeight.get(), extra = height % count;
for (int i=0; i<count; i++) {
Node child = children [i];
double childHeight = cellHeight;
if (i == 0) {
childHeight += extra / 2;
} else {
if (i == count - 1) childHeight += (extra + 1) / 2;
}
child.resizeRelocate (x, y, width, childHeight);
y += childHeight + spacing.get();
}
}
}
}
