swingmapview.java

一个JAVA的地图编辑器,适合快速开发移动终端游戏的好工具.

/**
 * This class is used by SwingMapTest to load and update the map
 **/


import java.awt.*;
import javax.swing.*;

public class SwingMapView extends JComponent implements Scrollable {

    private Mappy map;
    private String mapname;
    private int xoff, yoff;

    public SwingMapView() {
    	mapname = "TEST.FMP";
   		map = null;		//can't load map yet as createImage won't work until after setup
   		xoff = 0; yoff = 0;
        setAutoscrolls(true); //enable synthetic drag events
    }

    public void setPreferredHeight(int ph) {
        setPreferredSize(new Dimension(512, ph));
    }

    public void setPreferredWidth(int pw) {
        setPreferredSize(new Dimension(pw, 420));
    }

    public void paintComponent(Graphics g) {
        Rectangle drawHere = g.getClipBounds();

		if (map == null && mapname != null) {
			map = new Mappy ();
			map.loadMap (mapname, this);
			setPreferredSize(new Dimension (map.getMapWidth(), map.getMapHeight()));
			xoff = 0; yoff = 0;
			revalidate();
		    return;
		}
		if (map != null) {
			map.setScreenDimensions(drawHere.x, drawHere.y, drawHere.width, drawHere.height);
			map.setX (xoff+drawHere.x);
			map.setY (yoff+drawHere.y);
			map.drawBackground (g, false);
			map.drawForeground (g, 1);
			map.drawForeground (g, 2);
			map.drawForeground (g, 3);
		}
    }
    
    public Dimension getPreferredSize() {
    	if (map != null) {
    		return new Dimension (map.getMapWidth(), map.getMapHeight());
    	}
        return new Dimension(512, 420); //super.getPreferredSize();
    }

    public Dimension getPreferredScrollableViewportSize() {
        return new Dimension(512, 420);
    }

    public int getScrollableUnitIncrement(Rectangle visibleRect,
                                          int orientation,
                                          int direction) {
        //Get the current position.
		//System.out.println("SUI: o="+orientation+" d="+direction+"\n");
        int currentPosition = 0;
        if (orientation == SwingConstants.HORIZONTAL) {
            currentPosition = visibleRect.x;
		if (direction < 0) {
			currentPosition = visibleRect.x%map.getBlockWidth();
			if (currentPosition == 0) return map.getBlockWidth();
			return currentPosition;
		}
		if (direction > 0) return map.getBlockWidth()-(currentPosition%map.getBlockWidth());
        } else {
            currentPosition = visibleRect.y;
		if (direction < 0) {
			currentPosition = visibleRect.y%map.getBlockHeight();
			if (currentPosition == 0) return map.getBlockHeight();
			return currentPosition;
		}
		if (direction > 0) return map.getBlockHeight()-(currentPosition%map.getBlockHeight());
        }
        return currentPosition;

    }

    public int getScrollableBlockIncrement(Rectangle visibleRect,
                                           int orientation,
                                           int direction) {
        if (orientation == SwingConstants.HORIZONTAL) {
            return visibleRect.width - 16;
        } else {
            return visibleRect.height - 16;
        }
    }

    public boolean getScrollableTracksViewportWidth() {
        return false;
    }

    public boolean getScrollableTracksViewportHeight() {
        return false;
    }

}