gzz-mirror/Java/flob/FTextCellView.zob

/*   
FTextCellView.zob
 *    
 *    Copyright (c) 2001, Benja Fallenstein
 *    Copyright (c) 2000-2001, Ted Nelson and Tuomas Lukka
 *
 *    You may use and distribute under the terms of either the GNU Lesser
 *    General Public License, either version 2 of the license or,
 *    at your choice, any later version. Alternatively, you may use and
 *    distribute under the terms of the XPL.
 *
 *    See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of 
 *    the licenses.
 *
 *    This software 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 README
 *    file for more details.
 *
 */
/*
 * Written by Benja Fallenstein
 */

package org.gzigzag;
import java.util.*;
import java.awt.*;

/** A cell view showing some FText.
 *  This class exists in order to make it easy to create cell views which
 *  just take an FText for a cell somehow and then render it on the screen.
 *  Subclasses have to implement getFText(ZZCell, int). Default: render the
 *  cell's content in the specified string.
 *  <p>
 *  XXX Don't use scene flobs. Instead, just place the split cell flobs in the
 *      higher level flob set and create a BoxedFlob 'round them.
 */
 
public class FTextCellView implements FlobFactory, ZOb {
public static final String rcsid = "$Id: FTextCellView.zob,v 1.4 2001/04/02 20:20:54 bfallenstein Exp $";
    public static boolean dbg = false;
    private static void p(String s) { if(dbg) ZZLogger.log(s); }
    private static void pa(String s) { ZZLogger.log(s); }

    // WHAT SUBCLASSES NEED TO OVERRIDE

    /** Get the FText for this cell at the given scale.
     *  scale == fract * 1000.
     */
    protected FText getFText(ZZCell c, int scale) {
	return new FText(new FText.Part[] {
		new FText.CellPart(c, 0, -1, f(scale), fm(scale), null, null)
	});
    }



    // IMPLEMENTATION

    /** Get the font for a given scale. */
    protected final Font f(int sc) { return font.getFont(sc); }

    /** Get the font metrics for a given scale. */
    protected final FontMetrics fm(int sc) { return font.getFontMetrics(sc); }

    STRUCTPARAMS {
	/** The string to use to get the default cell width.  */
	String widthstr
	    = "0000000000";

	/** The default background color. 
	 * XXX Currently, because of color mixing, the foreground
	 * comes from FlobSet. This should maybe change - check later.
	 */
	Color bg
	    = Color.white;

	/** The font for the default enlargement.  */
	ScalableFont font
	    = new ScalableFont("SansSerif", Font.PLAIN, 12);

	ZOb ftextlayouter
	    = new FTextLayouter(false);

	/** The x and y margins
	 */
	int[] margins
	    = new int[] {2, 1};
    }

    protected int getScale(float fract) {
	return (int)(fract*1000);
    }

    public Dimension getSize(ZZCell c, float fract) {
	if(c != null) {
	    FText ftxt = getFText(c.getRootclone(), getScale(fract));
	    return new Dimension(FText.Part.width(ftxt.parts) + margins[0]*2,
				 FText.Part.height(ftxt.parts) + margins[1]*2);
	} else {
	    String str = widthstr;
	    if(str == null) str = "";
	    FontMetrics fm = fm(getScale(fract));
	    return CellFlob1.getSize(fm, str, margins[0], margins[1]);
	}
    }

    public Flob getFlob(FlobSet into, ZZCell c, FText ftxt,
			int x, int y, int d, int w, int h) {
	int xm = margins[0], ym = margins[1];

	BoxedFlob box = new BoxedFlob(x, y, d, w, h, c);

	CellFlobFactory1.addSolidColors(into, box, box);
	
	Rectangle rect = new Rectangle(x+xm, y+ym, w-xm, h-ym);
	((FTextLayouter)ftextlayouter).place(into, ftxt, rect, d, 1, y+ym, 0, 
					     true, box);

	// Add the box last, so that it is shown under the text.
	into.add(box);
	return box;
    }

    public Flob makeFlob(FlobSet into, ZZCell c, ZZCell handleCell,
			 float fract, int x, int y, int d, int w, int h) {
	FText ftxt = getFText(c.getRootclone(), getScale(fract));
	return getFlob(into, c, ftxt, x, y, d, w, h);
    }

    public Flob placeFlob(FlobSet into, ZZCell c, ZZCell handleCell,
		    float fract, 
			int x, int y, int depth,
			float xfract, float yfract) {
	FText ftxt = getFText(c.getRootclone(), getScale(fract));
	int w = FText.Part.width(ftxt.parts) + margins[0]*2;
	int h = FText.Part.height(ftxt.parts) + margins[1]*2;
	return getFlob(into, c, ftxt,
			(int)(x-xfract*w),
			(int)(y-yfract*h),
			depth, w, h);
    }

    public Flob centerFlob(FlobSet into, ZZCell c, ZZCell handleCell,
		float fract, Point p, int xalign, int yalign,
		int depth, Dimension d) {
	if(d == null) return centerFlob(into, c, handleCell, fract, p, xalign,
					yalign, depth);
	int x, y;
	x = p.x - d.width/2; y = p.y - d.height/2;
	
	if(xalign < 0) x = p.x;
	if(xalign > 0) x = p.x - d.width;
	if(yalign < 0) y = p.y;
	if(yalign > 0) y = p.y - d.height;
	p("centerFlob "+p+" "+d+" at "+x+" "+y+" align "+xalign+" "+yalign);
	return makeFlob(into, c, handleCell, fract, x, y, 
			depth, d.width, d.height);
    }
    public Flob centerFlob(FlobSet into, ZZCell c, ZZCell handleCell,
		float fract, Point p, int xalign, int yalign, int depth) {
	int x, y;

	FText ftxt = getFText(c.getRootclone(), getScale(fract));
	int w = FText.Part.width(ftxt.parts) + margins[0]*2;
	int h = FText.Part.height(ftxt.parts) + margins[1]*2;

	x = p.x - w/2; y = p.y - h/2;
	if(xalign < 0) x = p.x;
	if(xalign > 0) x = p.x - w;
	if(yalign < 0) y = p.y;
	if(yalign > 0) y = p.y - h;
	p("centerFlob "+p+" at "+x+" "+y+" "+w+" "+h+" align "+xalign+" "+yalign);

	return getFlob(into, c, ftxt, x, y, depth, w, h);
    }
}

// vim: set syntax=java :