Application: gvSIG desktop

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2005 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package org.gvsig.labeling.gui.styling.editortools;

import java.awt.Cursor;

import java.awt.Dimension;

import java.awt.Point;

import java.awt.Toolkit;

import java.awt.event.MouseEvent;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import javax.swing.AbstractButton;

import javax.swing.ImageIcon;

import javax.swing.JComponent;

import javax.swing.JToggleButton;

import org.gvsig.andami.IconThemeHelper;

import org.gvsig.app.gui.styling.EditorTool;

import org.gvsig.app.gui.styling.StyleEditor;

import org.gvsig.app.gui.styling.StylePreviewer;

import org.gvsig.fmap.mapcontext.rendering.symbols.styles.ILabelStyle;

import org.gvsig.fmap.mapcontext.rendering.symbols.styles.IStyle;

import org.gvsig.i18n.Messages;

/**

 *

 * SimpleLabelStylePanTool.java

 *

 *

 * @author jaume dominguez faus - jaume.dominguez@iver.es Jan 7, 2008

 *

 */

public class LabelStylePanTool extends EditorTool {

        private int NO_SELECTION_ON_STYLE = -1;

        private int TEXT_FIELD_SELECTED = 0;

        private int MARKER_POINT_SELECTED = 1;

        private JToggleButton btnPan;

        private Cursor cursor;

        private Point pIni, pEnd;

        private ILabelStyle style;

        private int toolSelected = NO_SELECTION_ON_STYLE;

        private int textFieldSelected = NO_SELECTION_ON_STYLE;

        private Dimension bounds;

        private int ownerHgap,ownerVgap;

        public LabelStylePanTool(JComponent owner) {

                super(owner);

        }

        private void getBounds() {

                bounds = ((StyleEditor) owner).getStylePreviewer().getSize();

                ownerHgap =  ((StyleEditor) owner).getStylePreviewer().getHGap();

                ownerVgap = ((StyleEditor) owner).getStylePreviewer().getVGap();

        }

        public Cursor getCursor() {

                if (cursor == null) {

                        ImageIcon cursorImage = IconThemeHelper.getImageIcon("cursor-pan");

                        cursor = Toolkit.getDefaultToolkit().createCustomCursor(cursorImage.getImage(),

                                        new Point(cursorImage.getIconWidth()/2,

                                                        cursorImage.getIconHeight()/2), //16, 16), "");

                                                        "");

                }

                return cursor;

        }

        public void mousePressed(MouseEvent e) {

                getBounds();

                Point2D marker = style.getMarkerPoint();

                pIni = new Point((int) (marker.getX()*(bounds.width-ownerHgap)),(int) (marker.getY()*(bounds.height-ownerVgap)));

                pEnd = e.getPoint();

                Point selectedPoint = new Point((int) (pEnd.getX()-ownerHgap),(int) (pEnd.getY()-ownerVgap));

                if((Math.abs(pIni.x - selectedPoint.x) < ownerHgap ) && (Math.abs(pIni.y - selectedPoint.y) < ownerVgap )){

                        toolSelected = MARKER_POINT_SELECTED;

                        return;

                }

                Point2D selPoint = screenPointToLabelPoint(pEnd);

                for (int i = style.getTextBounds().length - 1; i >= 0 ; i--) {

                        Rectangle2D rectangle = style.getTextBounds()[i];

                        if((selPoint.getX() >= rectangle.getMinX()) &&

                                        (selPoint.getX() <= rectangle.getMaxX()) &&

                                        (selPoint.getY() >= rectangle.getMinY())&&

                                        (selPoint.getY() <= rectangle.getMaxY())){

                                toolSelected = TEXT_FIELD_SELECTED;

                                textFieldSelected = i;

                                pIni = pEnd;

                                return;

                        }

                }

        }

        public void mouseReleased(MouseEvent e) {

                toolSelected = NO_SELECTION_ON_STYLE;

                textFieldSelected = NO_SELECTION_ON_STYLE;

        }

        public void mouseDragged(MouseEvent e) {

                pEnd = e.getPoint();

                if((pEnd.getX() > bounds.width - ownerHgap) || ( pEnd.getY() > bounds.getHeight() - ownerVgap) ||

                                (pEnd.getX() < ownerHgap) || ( pEnd.getY() < ownerVgap))

                        return;

                Point2D labelEndPoint = screenPointToLabelPoint(pEnd);

                if(toolSelected == TEXT_FIELD_SELECTED){

                        if(textFieldSelected != NO_SELECTION_ON_STYLE){

                                Rectangle2D rectangle = style.getTextBounds()[textFieldSelected];

                                Point2D labelIniPoint = screenPointToLabelPoint(pIni);

                                Point maxPoint = new Point((int)bounds.getWidth(), (int)bounds.getHeight());

                                Point2D labelMaxPoint = screenPointToLabelPoint(maxPoint);

                                Point2D labelZero = screenPointToLabelPoint(new Point(0,0));

                                double x = rectangle.getX() + labelEndPoint.getX()-labelIniPoint.getX();

                                if (x<labelZero.getX()){ x=labelZero.getX(); }

                                if ((x+rectangle.getWidth())>=labelMaxPoint.getX()) { x =  labelMaxPoint.getX()-rectangle.getWidth();}

                                double y = rectangle.getY() + labelEndPoint.getY()-labelIniPoint.getY();

                                if (y<labelZero.getY()){ y=labelZero.getY(); }

                                if ((y+rectangle.getHeight())>=labelMaxPoint.getY()) { y =  labelMaxPoint.getY()-rectangle.getHeight();}

                                rectangle.setRect(x,

                                                y,

                                                rectangle.getWidth(),

                                                rectangle.getHeight());

                                style.setTextFieldArea(textFieldSelected,rectangle);

                                pIni = pEnd;

                        }

                }

                else if (toolSelected == MARKER_POINT_SELECTED){

                        double xOffset = (pEnd.getX())/( bounds.getWidth()- ownerHgap );

                        double yOffset = (pEnd.getY())/( bounds.getHeight()- ownerVgap );

                        if(xOffset > 1) xOffset = 1;

                        if(xOffset < 0) xOffset = 0;

                        if(yOffset > 1) yOffset = 1;

                        if(yOffset < 0) yOffset = 0;

                        Point2D marker = style.getMarkerPoint();

                        marker.setLocation(xOffset, yOffset);

                }

                owner.repaint();

        }

        private Point2D screenPointToLabelPoint(Point pIni) {

                //FIXME: Esto es un parche, habr?a que cambiar la API de los estilos y simbolos

                //pero mientras tanto

                int minx = pIni.x;

                int miny = pIni.y;

                StylePreviewer sp = ((StyleEditor) owner).getStylePreviewer();

                Dimension bounds = sp.getSize();

                IStyle style = sp.getStyle();

                Dimension backgroundBounds = null;

                if (style instanceof ILabelStyle){

                        backgroundBounds = ((ILabelStyle)style).getSize();

                }

                Point2D p;

                if (backgroundBounds == null){

                        p = new Point2D.Double(

                                        pIni.x/(bounds.getWidth()-sp.getHGap()/2),

                                        pIni.y/(bounds.getHeight()-sp.getVGap()/2));

                } else {

                        double xOffset = 0;

                        double yOffset = 0;

                        double scale = 1;

                        if (backgroundBounds.getWidth()>backgroundBounds.getHeight()) {

                                scale = (bounds.getWidth()-sp.getHGap())/backgroundBounds.getWidth();

                                yOffset = 0.5*(bounds.getHeight()-sp.getVGap() - backgroundBounds.getHeight()*scale);

                        } else {

                                scale = (bounds.getHeight()-sp.getVGap())/backgroundBounds.getHeight();

                                xOffset = 0.5*(bounds.getWidth()-sp.getHGap() - backgroundBounds.getWidth()*scale);

                        }

                        p = new Point2D.Double(

                                        ((minx-(sp.getHGap()/2)-xOffset)/scale)/backgroundBounds.getWidth(),

                                        ((miny-(sp.getVGap()/2)-yOffset)/scale)/backgroundBounds.getHeight());

                }

                return p;

        }

        @Override

        public AbstractButton getButton() {

                return getBtnPan();

        }

        private JToggleButton getBtnPan() {

                if (btnPan == null) {

                        btnPan = new JToggleButton(

                                        IconThemeHelper.getImageIcon("edit-shift-component"));

                        btnPan.setToolTipText(

                                        Messages.getText("_Set_label_offset"));

                        btnPan.setPreferredSize(EditorTool.SMALL_BTN_SIZE);

                        btnPan.setSize(EditorTool.SMALL_BTN_SIZE);

                }

                return btnPan;

        }

        @Override

        public String getID() {

                return "1";

        }

        @Override

        public boolean isSuitableFor(Object obj) {

                return obj instanceof ILabelStyle;

        }

        @Override

        public void setModel(Object objectToBeEdited) {

                style = (ILabelStyle) objectToBeEdited;

        }

}