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/*******************************************************************************
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* Copyright (c) 2008, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package org.eclipse.gef.internal.ui.palette.editparts;
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import java.util.List;
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import org.eclipse.draw2d.FlowLayout;
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import org.eclipse.draw2d.IFigure;
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import org.eclipse.draw2d.geometry.Dimension;
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import org.eclipse.draw2d.geometry.Rectangle;
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/**
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* Extends <code>FlowLayout</code> to allow the pane of a pinnable stack in icon
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* mode to occupy the row following the row in which the icon of the palette
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* stack header appears.
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*
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* @author crevells
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* @since 3.4
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*/
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public class PaletteContainerFlowLayout extends FlowLayout {
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/**
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* Constructs a PaletteContainerFlowLayout with horizontal orientation.
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*/
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public PaletteContainerFlowLayout() {
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}
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/**
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* Constructs a PaletteContainerFlowLayout whose orientation is given in the
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* input.
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*
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* @param isHorizontal
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* <code>true</code> if the layout should be horizontal
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*/
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public PaletteContainerFlowLayout(boolean isHorizontal) {
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setHorizontal(isHorizontal);
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}
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/**
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* Overridden to include the size of the expanded pane of an expanded
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* pinnable palette stack.
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*
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* @see org.eclipse.draw2d.AbstractLayout#calculatePreferredSize(IFigure,
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* int, int)
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*/
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protected Dimension calculatePreferredSize(IFigure container, int wHint,
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int hHint) {
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Dimension prefSize = super.calculatePreferredSize(container, wHint,
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hHint);
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List children = container.getChildren();
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IFigure child;
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// Build the sizes for each row, and update prefSize accordingly
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Dimension expandedPaneSize = null;
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for (int i = 0; i < children.size(); i++) {
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child = (IFigure) children.get(i);
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if (child instanceof PinnablePaletteStackFigure
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&& ((PinnablePaletteStackFigure) child).isExpanded()) {
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// Subtract out the insets from the hints
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if (wHint > -1)
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wHint = Math.max(0, wHint
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- container.getInsets().getWidth());
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if (hHint > -1)
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hHint = Math.max(0, hHint
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- container.getInsets().getHeight());
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// Figure out the new hint that we are interested in based on
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// the
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// orientation. Ignore the other hint (by setting it to -1).
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// NOTE:
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// The children of the parent figure will then be asked to
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// ignore
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// that hint as well.
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if (isHorizontal()) {
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hHint = -1;
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} else {
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wHint = -1;
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}
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expandedPaneSize = ((PinnablePaletteStackFigure) child)
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.getExpandedContainerPreferredSize(wHint, hHint);
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break; // there can only be one expanded stack
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}
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}
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if (expandedPaneSize != null) {
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// increment height to account for expanded stack
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prefSize.height += transposer.t(expandedPaneSize).height;
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prefSize.union(getBorderPreferredSize(container));
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}
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return prefSize;
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}
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/**
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* Overridden to handle <code>PinnablePaletteStackFigure</code>.
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*
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* @see FlowLayout#getChildSize(IFigure, int, int)
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*/
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protected Dimension getChildSize(IFigure child, int wHint, int hHint) {
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if (child instanceof PinnablePaletteStackFigure) {
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return ((PinnablePaletteStackFigure) child).getHeaderPreferredSize(
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wHint, hHint);
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} else {
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return child.getPreferredSize(wHint, hHint);
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}
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}
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/**
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* Overridden to include the size of the expanded pane of an expanded
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* pinnable palette stack during the layout.
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*
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* @see FlowLayout#layoutRow(IFigure)
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*/
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protected void layoutRow(IFigure parent) {
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int majorAdjustment = 0;
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int minorAdjustment = 0;
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int correctMajorAlignment = majorAlignment;
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int correctMinorAlignment = minorAlignment;
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majorAdjustment = data.area.width - data.rowWidth + getMinorSpacing();
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switch (correctMajorAlignment) {
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case ALIGN_LEFTTOP:
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majorAdjustment = 0;
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break;
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case ALIGN_CENTER:
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majorAdjustment /= 2;
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break;
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case ALIGN_RIGHTBOTTOM:
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break;
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}
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int expandedPaneHeight = 0;
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for (int j = 0; j < data.rowCount; j++) {
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if (fill) {
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data.bounds[j].height = data.rowHeight;
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} else {
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minorAdjustment = data.rowHeight - data.bounds[j].height;
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switch (correctMinorAlignment) {
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case ALIGN_LEFTTOP:
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minorAdjustment = 0;
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break;
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case ALIGN_CENTER:
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minorAdjustment /= 2;
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break;
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case ALIGN_RIGHTBOTTOM:
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break;
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}
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data.bounds[j].y += minorAdjustment;
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}
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data.bounds[j].x += majorAdjustment;
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IFigure child = data.row[j];
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setBoundsOfChild(parent, data.row[j], transposer.t(data.bounds[j]));
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if (child instanceof PinnablePaletteStackFigure
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&& ((PinnablePaletteStackFigure) child).isExpanded()) {
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int wHint = -1;
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int hHint = -1;
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if (isHorizontal())
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wHint = parent.getClientArea().width;
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else
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hHint = parent.getClientArea().height;
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expandedPaneHeight = ((PinnablePaletteStackFigure) child)
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.getExpandedContainerPreferredSize(wHint, hHint).height;
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child.setBounds(new Rectangle(data.area.x, data.area.y
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+ data.rowY, data.area.width, data.rowHeight
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+ expandedPaneHeight));
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}
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}
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data.rowY += getMajorSpacing() + data.rowHeight + expandedPaneHeight;
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initRow();
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}
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/**
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* Overridden to set the bounds for <code>PinnablePaletteStackFigures</code>
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* .
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*
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* @see FlowLayout#setBoundsOfChild(IFigure, IFigure, Rectangle)
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*/
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protected void setBoundsOfChild(IFigure parent, IFigure child,
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Rectangle bounds) {
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if (child instanceof PinnablePaletteStackFigure
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&& ((PinnablePaletteStackFigure) child).isExpanded()) {
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parent.getClientArea(Rectangle.SINGLETON);
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bounds.translate(Rectangle.SINGLETON.x, Rectangle.SINGLETON.y);
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((PinnablePaletteStackFigure) child)
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.setHeaderBoundsLayoutHint(bounds);
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} else {
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super.setBoundsOfChild(parent, child, bounds);
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}
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}
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}
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