org.eclipse.osbp.vaadin.addons.absolutelayout/src/org/eclipse/osbp/vaadin/addons/absolutelayout/client/OAlignmentOverlay.java - osbp/org.eclipse.osbp.vaadin.addons - Git at Google

 /**
  *
  * Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
  *
  * 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:
  * Florian Pirchner <florian.pirchner@gmail.com> - Initial implementation
  */
 package org.eclipse.osbp.vaadin.addons.absolutelayout.client;

 import com.google.gwt.dom.client.Element;
 import com.google.gwt.dom.client.Style.Unit;
 import com.google.gwt.user.client.Timer;
 import com.google.gwt.user.client.ui.Widget;
 import com.vaadin.client.ui.VOverlay;

 // TODO: Auto-generated Javadoc
 /**
  * The Class OAlignmentOverlay.
  */
 public class OAlignmentOverlay extends VOverlay {

 	/** The Constant THICKNESS. */
 	private static final int THICKNESS = 1;

 	/** The Constant CLASSNAME. */
 	private static final String CLASSNAME = "o-alignmentLine";

 	/** The alignment location. */
 	private final AlignmentsLocation alignmentLocation;

 	/** The drag element. */
 	private final Element dragElement;

 	/** The snap timer. */
 	private Timer snapTimer;

 	/**
 	 * Shows alignment lines for drag and resize operations.
 	 *
 	 * @param owner the owner
 	 * @param dragElement the drag element
 	 * @param location the location
 	 * @param snap the snap
 	 * @param resize the resize
 	 * @param autoSnap the auto snap
 	 */
 	public OAlignmentOverlay(Widget owner, final Element dragElement, AlignmentsLocation location,
 			final OAlignmentSnapInfo snap, final boolean resize, boolean autoSnap) {
 		super(false, false);

 		super.setOwner(owner);
 		this.dragElement = dragElement;
 		this.alignmentLocation = location;

 		setStyleName(CLASSNAME);

 		setZIndex(VOverlay.Z_INDEX + 1);

 		if (autoSnap && (snap.getX() != 0 || snap.getY() != 0)) {
 			snapTimer = new Timer() {
 				@Override
 				public void run() {
 					if (resize) {
 						snapResizeImagePosition(dragElement, snap);
 					} else {
 						snapDragImagePosition(dragElement, snap);
 					}
 				}
 			};
 		}
 	}

 	/* (non-Javadoc)
 	 * @see com.vaadin.client.ui.VOverlay#show()
 	 */
 	@Override
 	public void show() {
 		int left = 0;
 		int top = 0;
 		int width = 0;
 		int height = 0;

 		if (alignmentLocation == null) {
 			return;
 		}

 		switch (alignmentLocation) {
 		case TOP_EDGE_TOLEFT:
 			width = getAlignmentLineX();
 			left = getOwner().getOffsetWidth() - width;
 			height = THICKNESS;
 			break;
 		case TOP_EDGE_TORIGHT:
 			width = getAlignmentLineX();
 			left = 0;
 			height = THICKNESS;
 			break;
 		case BOTTOM_EDGE_TOLEFT:
 			top = getOwner().getOffsetHeight();
 			width = getAlignmentLineX();
 			left = getOwner().getOffsetWidth() - width;
 			height = THICKNESS;
 			break;
 		case BOTTOM_EDGE_TORIGHT:
 			width = getAlignmentLineX();
 			left = 0;
 			top = getOwner().getOffsetHeight();
 			height = THICKNESS;
 			break;
 		case LEFT_EDGE_TOBOTTOM:
 			top = 0;
 			width = THICKNESS;
 			height = getAlignmentLineY();
 			break;
 		case LEFT_EDGE_TOTOP:
 			top = getOwner().getOffsetHeight() - getAlignmentLineY();
 			width = THICKNESS;
 			height = getAlignmentLineY();
 			break;
 		case RIGHT_EDGE_TOBOTTOM:
 			top = 0;
 			left = getOwner().getOffsetWidth();
 			width = THICKNESS;
 			height = getAlignmentLineY();
 			break;
 		case RIGHT_EDGE_TOTOP:
 			top = getOwner().getOffsetHeight() - getAlignmentLineY();
 			left = getOwner().getOffsetWidth();
 			width = THICKNESS;
 			height = getAlignmentLineY();
 			break;
 		}

 		// set adjustment size
 		Element element = getContainerElement();
 		element.getStyle().setWidth(width, Unit.PX);
 		element.getStyle().setHeight(height, Unit.PX);
 		String bg = element.getStyle().getBackgroundColor();
 		if (bg == null || bg.equals("")) {
 			element.getStyle().setBackgroundColor("red");
 		}

 		// set the popup position
 		int absoluteLeft = getOwner().getAbsoluteLeft() + left;
 		int absoluteTop = getOwner().getAbsoluteTop() + top;
 		setPopupPosition(absoluteLeft, absoluteTop);

 		super.show();

 		if (snapTimer != null) {
 			snapTimer.schedule(300);
 		}
 	}

 	/**
 	 * Calculates the horizontal alignment line.
 	 *
 	 * @return the alignment line x
 	 */
 	private int getAlignmentLineX() {
 		if (isOwnerLeftOfImage()) {
 			return dragElement.getAbsoluteLeft() - getOwner().getAbsoluteLeft() + +dragElement.getOffsetWidth();
 		} else {
 			return getOwner().getAbsoluteLeft() - dragElement.getAbsoluteLeft() + getOwner().getOffsetWidth();
 		}
 	}

 	/**
 	 * Checks if is owner left of image.
 	 *
 	 * @return true, if is owner left of image
 	 */
 	private boolean isOwnerLeftOfImage() {
 		return getOwner().getAbsoluteLeft() < dragElement.getAbsoluteLeft();
 	}

 	/**
 	 * Calculates the vertical alignment line.
 	 *
 	 * @return the alignment line y
 	 */
 	private int getAlignmentLineY() {
 		if (isOwnerTopOfImage()) {
 			return dragElement.getAbsoluteTop() - getOwner().getAbsoluteTop() + dragElement.getOffsetHeight();
 		} else {
 			return getOwner().getAbsoluteTop() - dragElement.getAbsoluteTop() + getOwner().getOffsetHeight();
 		}
 	}

 	/**
 	 * Checks if is owner top of image.
 	 *
 	 * @return true, if is owner top of image
 	 */
 	private boolean isOwnerTopOfImage() {
 		return getOwner().getAbsoluteTop() < dragElement.getAbsoluteTop();
 	}

 	/* (non-Javadoc)
 	 * @see com.vaadin.client.ui.VOverlay#hide()
 	 */
 	@Override
 	public void hide() {
 		if (snapTimer != null) {
 			snapTimer.cancel();
 		}

 		super.hide();
 	}

 	/**
 	 * Snap drag image position.
 	 *
 	 * @param dragImage the drag image
 	 * @param snap the snap
 	 */
 	private void snapDragImagePosition(final Element dragImage, final OAlignmentSnapInfo snap) {
 		int offsetTop = 0;
 		try {
 			String offsetTopStr = dragImage.getStyle().getMarginTop();
 			offsetTop = Integer.parseInt(offsetTopStr.substring(0, offsetTopStr.length() - 2));
 		} catch (NumberFormatException e) {
 			// nothing to do
 		}
 		dragImage.getStyle().setTop(dragImage.getAbsoluteTop() - offsetTop - snap.getY(), Unit.PX);

 		int offsetLeft = 0;
 		try {
 			String offsetLeftStr = dragImage.getStyle().getMarginLeft();
 			offsetLeft = Integer.parseInt(offsetLeftStr.substring(0, offsetLeftStr.length() - 2));
 		} catch (NumberFormatException e) {
 			// nothing to do
 		}
 		dragImage.getStyle().setLeft(dragImage.getAbsoluteLeft() - offsetLeft - snap.getX(), Unit.PX);
 	}

 	/**
 	 * Snap resize image position.
 	 *
 	 * @param dragImage the drag image
 	 * @param delta the delta
 	 */
 	private void snapResizeImagePosition(final Element dragImage, final OAlignmentSnapInfo delta) {

 		OResizeLocation location = OAlignmentManager.get().getResizeLocation();
 		int oldWidth = dragImage.getOffsetWidth();
 		int oldHeigth = dragImage.getOffsetHeight();

 		int newWidth = 0;
 		int newHeight = 0;

 		switch (location) {
 		case TOP:
 		case TOP_LEFT:
 		case LEFT:
 			newHeight = oldHeigth + delta.getY();
 			newWidth = oldWidth + delta.getX();
 			break;
 		case BOTTOM:
 		case BOTTOM_RIGHT:
 		case RIGHT:
 			newHeight = oldHeigth - delta.getY();
 			newWidth = oldWidth - delta.getX();
 			break;
 		case TOP_RIGHT:
 			newHeight = oldHeigth + delta.getY();
 			newWidth = oldWidth - delta.getX();
 			break;
 		case BOTTOM_LEFT:
 			newHeight = oldHeigth - delta.getY();
 			newWidth = oldWidth + delta.getX();
 			break;
 		}

 		dragImage.getStyle().setWidth(newWidth, Unit.PX);
 		dragImage.getStyle().setHeight(newHeight, Unit.PX);
 	}

 	/**
 	 * Indicates where the alignments should be painted.
 	 */
 	public enum AlignmentsLocation {

 		/** The top edge toleft. */
 		TOP_EDGE_TOLEFT,
  /** The top edge toright. */
  TOP_EDGE_TORIGHT,
  /** The left edge totop. */
  LEFT_EDGE_TOTOP,
  /** The left edge tobottom. */
  LEFT_EDGE_TOBOTTOM,
  /** The bottom edge toleft. */
  BOTTOM_EDGE_TOLEFT,
  /** The bottom edge toright. */
  BOTTOM_EDGE_TORIGHT,
  /** The right edge totop. */
  RIGHT_EDGE_TOTOP,
  /** The right edge tobottom. */
  RIGHT_EDGE_TOBOTTOM
 	}
 }
	/**
	*
	* Copyright (c) 2011, 2016 - Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
	*
	* 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:
	* Florian Pirchner <florian.pirchner@gmail.com> - Initial implementation
	*/
	package org.eclipse.osbp.vaadin.addons.absolutelayout.client;

	import com.google.gwt.dom.client.Element;
	import com.google.gwt.dom.client.Style.Unit;
	import com.google.gwt.user.client.Timer;
	import com.google.gwt.user.client.ui.Widget;
	import com.vaadin.client.ui.VOverlay;

	// TODO: Auto-generated Javadoc
	/**
	* The Class OAlignmentOverlay.
	*/
	public class OAlignmentOverlay extends VOverlay {

	/** The Constant THICKNESS. */
	private static final int THICKNESS = 1;

	/** The Constant CLASSNAME. */
	private static final String CLASSNAME = "o-alignmentLine";

	/** The alignment location. */
	private final AlignmentsLocation alignmentLocation;

	/** The drag element. */
	private final Element dragElement;

	/** The snap timer. */
	private Timer snapTimer;

	/**
	* Shows alignment lines for drag and resize operations.
	*
	* @param owner the owner
	* @param dragElement the drag element
	* @param location the location
	* @param snap the snap
	* @param resize the resize
	* @param autoSnap the auto snap
	*/
	public OAlignmentOverlay(Widget owner, final Element dragElement, AlignmentsLocation location,
	final OAlignmentSnapInfo snap, final boolean resize, boolean autoSnap) {
	super(false, false);

	super.setOwner(owner);
	this.dragElement = dragElement;
	this.alignmentLocation = location;

	setStyleName(CLASSNAME);

	setZIndex(VOverlay.Z_INDEX + 1);

	if (autoSnap && (snap.getX() != 0 \|\| snap.getY() != 0)) {
	snapTimer = new Timer() {
	@Override
	public void run() {
	if (resize) {
	snapResizeImagePosition(dragElement, snap);
	} else {
	snapDragImagePosition(dragElement, snap);
	}
	}
	};
	}
	}

	/* (non-Javadoc)
	* @see com.vaadin.client.ui.VOverlay#show()
	*/
	@Override
	public void show() {
	int left = 0;
	int top = 0;
	int width = 0;
	int height = 0;

	if (alignmentLocation == null) {
	return;
	}

	switch (alignmentLocation) {
	case TOP_EDGE_TOLEFT:
	width = getAlignmentLineX();
	left = getOwner().getOffsetWidth() - width;
	height = THICKNESS;
	break;
	case TOP_EDGE_TORIGHT:
	width = getAlignmentLineX();
	left = 0;
	height = THICKNESS;
	break;
	case BOTTOM_EDGE_TOLEFT:
	top = getOwner().getOffsetHeight();
	width = getAlignmentLineX();
	left = getOwner().getOffsetWidth() - width;
	height = THICKNESS;
	break;
	case BOTTOM_EDGE_TORIGHT:
	width = getAlignmentLineX();
	left = 0;
	top = getOwner().getOffsetHeight();
	height = THICKNESS;
	break;
	case LEFT_EDGE_TOBOTTOM:
	top = 0;
	width = THICKNESS;
	height = getAlignmentLineY();
	break;
	case LEFT_EDGE_TOTOP:
	top = getOwner().getOffsetHeight() - getAlignmentLineY();
	width = THICKNESS;
	height = getAlignmentLineY();
	break;
	case RIGHT_EDGE_TOBOTTOM:
	top = 0;
	left = getOwner().getOffsetWidth();
	width = THICKNESS;
	height = getAlignmentLineY();
	break;
	case RIGHT_EDGE_TOTOP:
	top = getOwner().getOffsetHeight() - getAlignmentLineY();
	left = getOwner().getOffsetWidth();
	width = THICKNESS;
	height = getAlignmentLineY();
	break;
	}

	// set adjustment size
	Element element = getContainerElement();
	element.getStyle().setWidth(width, Unit.PX);
	element.getStyle().setHeight(height, Unit.PX);
	String bg = element.getStyle().getBackgroundColor();
	if (bg == null \|\| bg.equals("")) {
	element.getStyle().setBackgroundColor("red");
	}

	// set the popup position
	int absoluteLeft = getOwner().getAbsoluteLeft() + left;
	int absoluteTop = getOwner().getAbsoluteTop() + top;
	setPopupPosition(absoluteLeft, absoluteTop);

	super.show();

	if (snapTimer != null) {
	snapTimer.schedule(300);
	}
	}

	/**
	* Calculates the horizontal alignment line.
	*
	* @return the alignment line x
	*/
	private int getAlignmentLineX() {
	if (isOwnerLeftOfImage()) {
	return dragElement.getAbsoluteLeft() - getOwner().getAbsoluteLeft() + +dragElement.getOffsetWidth();
	} else {
	return getOwner().getAbsoluteLeft() - dragElement.getAbsoluteLeft() + getOwner().getOffsetWidth();
	}
	}

	/**
	* Checks if is owner left of image.
	*
	* @return true, if is owner left of image
	*/
	private boolean isOwnerLeftOfImage() {
	return getOwner().getAbsoluteLeft() < dragElement.getAbsoluteLeft();
	}

	/**
	* Calculates the vertical alignment line.
	*
	* @return the alignment line y
	*/
	private int getAlignmentLineY() {
	if (isOwnerTopOfImage()) {
	return dragElement.getAbsoluteTop() - getOwner().getAbsoluteTop() + dragElement.getOffsetHeight();
	} else {
	return getOwner().getAbsoluteTop() - dragElement.getAbsoluteTop() + getOwner().getOffsetHeight();
	}
	}

	/**
	* Checks if is owner top of image.
	*
	* @return true, if is owner top of image
	*/
	private boolean isOwnerTopOfImage() {
	return getOwner().getAbsoluteTop() < dragElement.getAbsoluteTop();
	}

	/* (non-Javadoc)
	* @see com.vaadin.client.ui.VOverlay#hide()
	*/
	@Override
	public void hide() {
	if (snapTimer != null) {
	snapTimer.cancel();
	}

	super.hide();
	}

	/**
	* Snap drag image position.
	*
	* @param dragImage the drag image
	* @param snap the snap
	*/
	private void snapDragImagePosition(final Element dragImage, final OAlignmentSnapInfo snap) {
	int offsetTop = 0;
	try {
	String offsetTopStr = dragImage.getStyle().getMarginTop();
	offsetTop = Integer.parseInt(offsetTopStr.substring(0, offsetTopStr.length() - 2));
	} catch (NumberFormatException e) {
	// nothing to do
	}
	dragImage.getStyle().setTop(dragImage.getAbsoluteTop() - offsetTop - snap.getY(), Unit.PX);

	int offsetLeft = 0;
	try {
	String offsetLeftStr = dragImage.getStyle().getMarginLeft();
	offsetLeft = Integer.parseInt(offsetLeftStr.substring(0, offsetLeftStr.length() - 2));
	} catch (NumberFormatException e) {
	// nothing to do
	}
	dragImage.getStyle().setLeft(dragImage.getAbsoluteLeft() - offsetLeft - snap.getX(), Unit.PX);
	}

	/**
	* Snap resize image position.
	*
	* @param dragImage the drag image
	* @param delta the delta
	*/
	private void snapResizeImagePosition(final Element dragImage, final OAlignmentSnapInfo delta) {

	OResizeLocation location = OAlignmentManager.get().getResizeLocation();
	int oldWidth = dragImage.getOffsetWidth();
	int oldHeigth = dragImage.getOffsetHeight();

	int newWidth = 0;
	int newHeight = 0;

	switch (location) {
	case TOP:
	case TOP_LEFT:
	case LEFT:
	newHeight = oldHeigth + delta.getY();
	newWidth = oldWidth + delta.getX();
	break;
	case BOTTOM:
	case BOTTOM_RIGHT:
	case RIGHT:
	newHeight = oldHeigth - delta.getY();
	newWidth = oldWidth - delta.getX();
	break;
	case TOP_RIGHT:
	newHeight = oldHeigth + delta.getY();
	newWidth = oldWidth - delta.getX();
	break;
	case BOTTOM_LEFT:
	newHeight = oldHeigth - delta.getY();
	newWidth = oldWidth + delta.getX();
	break;
	}

	dragImage.getStyle().setWidth(newWidth, Unit.PX);
	dragImage.getStyle().setHeight(newHeight, Unit.PX);
	}

	/**
	* Indicates where the alignments should be painted.
	*/
	public enum AlignmentsLocation {

	/** The top edge toleft. */
	TOP_EDGE_TOLEFT,
	/** The top edge toright. */
	TOP_EDGE_TORIGHT,
	/** The left edge totop. */
	LEFT_EDGE_TOTOP,
	/** The left edge tobottom. */
	LEFT_EDGE_TOBOTTOM,
	/** The bottom edge toleft. */
	BOTTOM_EDGE_TOLEFT,
	/** The bottom edge toright. */
	BOTTOM_EDGE_TORIGHT,
	/** The right edge totop. */
	RIGHT_EDGE_TOTOP,
	/** The right edge tobottom. */
	RIGHT_EDGE_TOBOTTOM
	}
	}