/*
 * ReportAlignWithMoveStrategyProvider.java
 * 
 * Created on Aug 30, 2007, 3:24:02 PM
 * 
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package com.jaspersoft.ireport.designer.actions;

import com.jaspersoft.ireport.designer.IReportManager;
import com.jaspersoft.ireport.designer.ReportObjectScene;
import com.jaspersoft.ireport.designer.undo.AggregatedUndoableEdit;
import com.jaspersoft.ireport.designer.undo.ObjectPropertyUndoableEdit;
import com.jaspersoft.ireport.designer.widgets.JRDesignElementWidget;
import com.jaspersoft.ireport.designer.widgets.SelectionWidget;
import java.awt.Cursor;
import java.awt.Insets;
import java.awt.Point;
import java.awt.Rectangle;
import java.util.ArrayList;
import java.util.List;
import net.sf.jasperreports.engine.JRElement;
import net.sf.jasperreports.engine.design.JRDesignFrame;
import org.netbeans.api.visual.action.ActionFactory;
import org.netbeans.api.visual.action.AlignWithMoveDecorator;
import org.netbeans.api.visual.action.AlignWithWidgetCollector;
import org.netbeans.api.visual.action.MoveProvider;
import org.netbeans.api.visual.action.MoveStrategy;
import org.netbeans.api.visual.widget.LayerWidget;
import org.netbeans.api.visual.widget.Widget;

/**
 *
 * @author gtoffoli
 */
public class ReportAlignWithMoveStrategyProvider extends AlignWithSupport implements MoveStrategy, MoveProvider {

    private boolean outerBounds;
    private boolean moveEnabled = false;
    private boolean snapToGrid = false;

    public int getGridSize() {
        return gridSize;
    }

    public void setGridSize(int gridSize) {
        this.gridSize = gridSize;
    }

    public boolean isOuterBounds() {
        return outerBounds;
    }

    public void setOuterBounds(boolean outerBounds) {
        this.outerBounds = outerBounds;
    }

    public boolean isSnapToGrid() {
        return snapToGrid;
    }

    public void setSnapToGrid(boolean snapToGrid) {
        this.snapToGrid = snapToGrid;
    }
    private int gridSize = 13;
    
    public ReportAlignWithMoveStrategyProvider (AlignWithWidgetCollector collector, LayerWidget interractionLayer, AlignWithMoveDecorator decorator, boolean outerBounds) {
        super (collector, interractionLayer, decorator);
        this.outerBounds = outerBounds;
    }

    public Point locationSuggested (Widget widget, Point originalLocation, Point suggestedLocation) {
        
        if (!moveEnabled)
        {
            if (Math.abs(suggestedLocation.x-originalLocation.x) > 5 || 
                Math.abs(suggestedLocation.y-originalLocation.y) > 5)
            {
                moveEnabled = true;
            }
            else
            {
                return originalLocation;
            }
        }
        
        Point widgetLocation = widget.getLocation();
        Rectangle widgetBounds = outerBounds ? widget.getBounds () : widget.getClientArea();
        Rectangle bounds = widget.convertLocalToScene (widgetBounds);
        bounds.translate (suggestedLocation.x - widgetLocation.x, suggestedLocation.y - widgetLocation.y);
        Insets insets = widget.getBorder ().getInsets ();
        
        if (!outerBounds) {
            suggestedLocation.x += insets.left;
            suggestedLocation.y += insets.top;
        }
        
        Point point = new Point(suggestedLocation);
        if (isSnapToGrid())
        {
            
            point = snapToGrid(point, getGridSize());
            //System.out.println("Snapping....x:" + widget.getBounds().x + " " +suggestedLocation + " " + widgetLocation + "=> " + point + " " + bounds);
            
            point.x += insets.left;
            point.y += insets.top;
        }
        else
        {
            //System.out.println("Free movements");
            //System.out.flush();
            point = super.locationSuggested(widget, bounds, point, true, true, true, true);
        }
        
        if (! outerBounds) {
            point.x -= insets.left;
            point.y -= insets.top;
        }
        return widget.getParentWidget().convertSceneToLocal (point);
    }

    java.util.List<ObjectPropertyUndoableEdit> undoEdits = null; 
    public void movementStarted (Widget widget) {
        moveEnabled = false;
        
        undoEdits = new java.util.ArrayList<ObjectPropertyUndoableEdit>();
        
        List<Widget> selectedElements = ((ReportObjectScene)widget.getScene()).getSelectionLayer().getChildren();
        
        // for each element, let's save x and y...
        for (Widget w : selectedElements)
        {
           if (w.isVisible())
           {
                JRDesignElementWidget dew = ((SelectionWidget)w).getRealWidget();
                undoEdits.add(new ObjectPropertyUndoableEdit(dew.getElement(), "X", Integer.TYPE, new Integer(dew.getElement().getX()), new Integer(dew.getElement().getX())));
                undoEdits.add(new ObjectPropertyUndoableEdit(dew.getElement(), "Y", Integer.TYPE, new Integer(dew.getElement().getY()), new Integer(dew.getElement().getY())));
           }
        }
        show ();
    }

    public void movementFinished (Widget widget) {
        
        // add the undo operation...
        for (int i=0;i<undoEdits.size(); ++i)
        {
            ObjectPropertyUndoableEdit edit = undoEdits.get(i);
            if (edit.getNewValue() == null &&
                edit.getOldValue() == null) 
            {
                undoEdits.remove(edit);
                continue;
            }
            if (edit.getNewValue() != null &&
                edit.getOldValue() != null &&
                edit.getNewValue().equals(edit.getOldValue()))
            {
                undoEdits.remove(edit);
                continue;
            }
        }
        
        if (undoEdits.size() > 0)
        {
            AggregatedUndoableEdit masterEdit = new AggregatedUndoableEdit("Move");
            for (int i=0;i<undoEdits.size(); ++i)
            {
                ObjectPropertyUndoableEdit edit = undoEdits.get(i);
                masterEdit.concatenate(edit);
            }
            
            IReportManager.getInstance().addUndoableEdit(masterEdit);
        }
        
        
        hide ();
    }

    public Point getOriginalLocation (Widget widget) {
        return ActionFactory.createDefaultMoveProvider ().getOriginalLocation (widget);
    }

    public void setNewLocation (Widget widget, Point location) 
    {
        // Calculating movement delta...
        Point p = widget.getPreferredLocation();
        Point delta = new Point(location);
        delta.translate(-p.x, -p.y);
        if (delta.x == 0 && delta.y == 0) return; //Nothing to do...
        //ActionFactory.createDefaultMoveProvider().setNewLocation(widget, location);
        // Update all the selected objects...
        
        List<Widget> selectedElements = ((ReportObjectScene)widget.getScene()).getSelectionLayer().getChildren();
        ArrayList<Widget> changedWidgets = new ArrayList<Widget>();
        
        for (Widget w : selectedElements)
        {
           if (w.isVisible())
           {
                JRDesignElementWidget dew = ((SelectionWidget)w).getRealWidget();
                
                if (changedWidgets.contains(dew)) continue;
                
                Point loc = w.getPreferredLocation();
                loc.translate(delta.x, delta.y);
                w.setPreferredLocation(loc);
                
                Point dewloc = dew.getPreferredLocation();
                dewloc.translate(delta.x, delta.y);
                dewloc = dew.convertLocalToModelLocation(dewloc);
                boolean b = dew.setChanging(true);
                try {
                    dew.getElement().setX( dewloc.x);
                    dew.getElement().setY( dewloc.y);
                    findEdit(dew.getElement(),"X").setNewValue(dewloc.x);
                    findEdit(dew.getElement(),"Y").setNewValue(dewloc.y);
                } finally {
                    dew.setChanging(b);
                }
                dew.updateBounds();
                if (dew.getElement() instanceof JRDesignFrame)
                {
                    updateChildren((JRDesignFrame)dew.getElement(), (ReportObjectScene)dew.getScene(), changedWidgets);
                }
                
                changedWidgets.add(dew);
           }
        }
        
    }
    
    private ObjectPropertyUndoableEdit findEdit(Object obj, String property)
    {
        for (ObjectPropertyUndoableEdit edit : undoEdits)
        {
            if (edit.getObject() == obj &&
                edit.getProperty().equals(property))
            {
                return edit;
            }
        }
        return null;
    }
    
    private void updateChildren(JRDesignFrame parent, ReportObjectScene scene, ArrayList<Widget> changedWidgets)
    {
          JRElement[] elements = parent.getElements();
          for (int i=0; i < elements.length; ++i)
          {
               JRDesignElementWidget w = (JRDesignElementWidget)scene.findWidget(elements[i]);
               if (changedWidgets.contains(w)) continue;
               w.updateBounds();
               w.getSelectionWidget().updateBounds();

               if (elements[i] instanceof JRDesignFrame)
               {
                   updateChildren((JRDesignFrame)elements[i], scene, changedWidgets);
               }
               
               changedWidgets.add(w);
          }
    }
}
