zprintpreview.java

用Java写的报表.功能如下: 0.内建网络打印,网络预览功能！ 1.文件操作。包括url 指定的文件。 2.全功能打印支持。包括打印预览。 3.Undo 和 redo。 4.合并单元格。 5.Cel

/*
 * Copyright 2002 EZCell , Inc. All rights reserved.
 * Version  1.0.
 * Author   W.John
 */
package ezcell;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragSource;
import java.awt.dnd.DropTarget;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.print.PageFormat;
import java.awt.print.Paper;
import java.util.ArrayList;
import java.util.Vector;
import javax.swing.JComponent;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.border.MatteBorder;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;


/**
 * DOCUMENT ME!
 *
 * @version 1.00
 * @author W.John
 */
class ZPrintPreview extends JScrollPane implements ChangeListener {
    static final int MINIUM_SPACE = 200;

    // components
    private _PageCanvas pagePane;

    // document ;
    private ZDocument doc;
    ZPrintPreviewControl control;
    Vector listeners = new Vector();
    private ArrayList marginers = new ArrayList();
    private ArrayList marginLines = new ArrayList();
    boolean marginersDirty = true;
    boolean marginable = true;
    private ZRect header;
    private ZRect body;
    private ZRect footer;

    ZPrintPreview(ZDocument doc, int edit) {
        super(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);


        // mvc
        this.doc = doc;
        doc.addListener(this);
        init(edit);
    }

    /**
     * DOCUMENT ME!
     *
     * @param enable
     */
    public void setMarginable(boolean enable) {
        if (marginable == enable) {
            return;
        }

        marginable = enable;
        pagePane.repaint();
    }

    /**
     * DOCUMENT ME!
     *
     * @return
     */
    public boolean getMarginable() {
        return marginable;
    }

    /**
     * DOCUMENT ME!
     *
     * @return
     */
    public ZSheetState getModal() {
        return control.getModal();
    }

    /**
     * DOCUMENT ME!
     *
     * @param shape
     */
    public void add(ZShape shape) {
        shape.paint((Graphics2D) pagePane.getGraphics());
    }

    /**
     * DOCUMENT ME!
     *
     * @param lst
     */
    public void addListener(ChangeListener lst) {
        listeners.add(lst);
    }

    /**
     * DOCUMENT ME!
     */
    public void editFooter() {
        if (control.getModal() == doc.getFooterModal()) {
            return;
        }

        control.setModal(doc.getFooterModal());
        fireStateChanged();
    }

    /**
     * DOCUMENT ME!
     */
    public void editHeader() {
        if (control.getModal() == doc.getHeaderModal()) {
            return;
        }

        control.setModal(doc.getHeaderModal());
        fireStateChanged();
    }

    /**
     * DOCUMENT ME!
     */
    public void fireStateChanged() {
        ChangeEvent e = new ChangeEvent(this);

        for (int i = 0; i < listeners.size(); i++) {
            ChangeListener lst = (ChangeListener) listeners.get(i);
            lst.stateChanged(e);
        }
    }

    /**
     * DOCUMENT ME!
     *
     * @param p
     *
     * @return
     */
    public ZShape hit(Point p) {
        for (int i = 0; i < marginers.size(); i++) {
            ZShape sp = (ZShape) marginers.get(i);

            if (sp.hit(p) != null) {
                return sp;
            }
        }

        return null;
    }

    /**
     * DOCUMENT ME!
     *
     * @param shape
     */
    public void kill(ZShape shape) {
        shape.erase((Graphics2D) pagePane.getGraphics());
    }

    /**
     * DOCUMENT ME!
     *
     * @param shape
     * @param to
     */
    public void move(ZShape shape, Point to) {
        shape.erase((Graphics2D) pagePane.getGraphics());
        shape.moveTo(to.x, to.y);
        shape.paint((Graphics2D) pagePane.getGraphics());
    }

    /**
     * DOCUMENT ME!
     *
     * @param lst
     */
    public void removeListener(ChangeListener lst) {
        listeners.remove(lst);
    }

    /**
     * DOCUMENT ME!
     *
     * @param changeEvent
     */
    public void stateChanged(ChangeEvent changeEvent) {
        marginersDirty = true;
        updateLayout();
    }

    /**
     * DOCUMENT ME!
     */
    public void updateLayout() {
        _PageContainer pc = (_PageContainer) getViewport().getComponent(0);
        pc.revalidate();
    }

    /**
     * DOCUMENT ME!
     *
     * @param edit
     */
    void init(int edit) {
        //
        _PageContainer pageContainer = new _PageContainer();
        pagePane = new _PageCanvas();
        pagePane.setLayout(null);
        pageContainer.setLayout(new BorderLayout());
        pageContainer.add(pagePane, BorderLayout.CENTER);
        getViewport().add(pageContainer);

        // hook the listeners of mouse event
        ZSheetState sheetState = null;

        if (edit == ZDocument.PAGE_HEADER) {
            sheetState = doc.getHeaderModal();
        } else if (edit == ZDocument.PAGE_FOOTER) {
            sheetState = doc.getFooterModal();
        }

        control = new ZPrintPreviewControl(sheetState);

        //      pagePane.addComponentListener(control);
        // register dnd support
        DragSource dragSource = DragSource.getDefaultDragSource();
        dragSource.createDefaultDragGestureRecognizer(pagePane, DnDConstants.ACTION_COPY_OR_MOVE, control);
        new DropTarget(pagePane, DnDConstants.ACTION_MOVE, control);


        // create resizeBare
        // set document
        doc.setControl(control);
        doc.setComponent(pagePane);
        this.addComponentListener(new ComponentAdapter() {
            public void componentShown(ComponentEvent componentEvent) {
                fireStateChanged();
            }
        });
        this.addFocusListener(control);
    }

    /**
     * DOCUMENT ME!
     */
    void recreateMarginers() {


        if (!marginersDirty) {
            return;
        }

        float scale = doc.getScale();
        marginers.clear();

        Point tl = new Point((int) (scale * doc.getPageFormat().getImageableX()),
                             (int) (scale * doc.getPageFormat().getImageableY()));
        Point br = new Point((int) (scale * (doc.getPageFormat().getImageableX() + doc.getPageFormat().getImageableWidth())),
                             (int) (scale * (doc.getPageFormat().getImageableY() + doc.getPageFormat().getImageableHeight())));
        Point ps = new Point((int) (doc.getPageFormat().getWidth() * scale), (int) (scale * doc.getPageFormat().getHeight()));


        //        0          1
        //        |          |
        //     2 -|----------|- 3
        //        |  header  |
        //     8 -|----------|- 9
        //        |          |
        //        |  centent |
        //        |          |
        //     10-|----------|- 11
        //        |  footer  |
        //     4 -|----------|- 5
        //        |          |
        //        6          7
        marginers.add(new ZShape.Rectangle(tl.x - 2, 0, tl.x + 2, 6, 0)); // 0
        marginers.add(new ZShape.Rectangle(br.x - 2, 0, br.x + 2, 6, 1)); // 1
        marginers.add(new ZShape.Rectangle(0, tl.y - 2, 6, tl.y + 2, 2)); // 2
        marginers.add(new ZShape.Rectangle(ps.x - 6, tl.y - 2, ps.x, tl.y + 2, 3)); // 3
        marginers.add(new ZShape.Rectangle(0, br.y - 2, 6, br.y + 2, 4)); // 4
        marginers.add(new ZShape.Rectangle(ps.x - 6, br.y - 2, ps.x, br.y + 2, 5)); // 5
        marginers.add(new ZShape.Rectangle(tl.x - 2, ps.y - 6, tl.x + 2, ps.y, 6)); // 6
        marginers.add(new ZShape.Rectangle(br.x - 2, ps.y - 6, br.x + 2, ps.y, 7));

        int hh = (int) (doc.getHeaderHeight() * scale);

        if (hh > 0) {
            marginers.add(new ZShape.Rectangle(0, tl.y - 2 + hh, 6, tl.y + 2 + hh, 8)); // 2
            marginers.add(new ZShape.Rectangle(ps.x - 6, tl.y - 2 + hh, ps.x, tl.y + 2 + hh, 9)); // 3
        }

        int fh = (int) (doc.getFooterHeight() * scale);

        if (fh > 0) {
            marginers.add(new ZShape.Rectangle(0, br.y - 2 - fh, 6, (br.y + 2) - fh, 10)); // 4
            marginers.add(new ZShape.Rectangle(ps.x - 6, br.y - 2 - fh, ps.x, (br.y + 2) - fh, 11)); // 5
        }

        marginersDirty = false; // 7


        //
        marginLines.clear();

        ZPen pen = new ZPen(1, new Color(192, 192, 192));
        marginLines.add(new ZShape.SimpleHLine(tl.x, 0, tl.x, ps.y, pen)); //0-6
        marginLines.add(new ZShape.SimpleHLine(br.x, 0, br.x, ps.y, pen)); //1-7
        marginLines.add(new ZShape.SimpleHLine(0, tl.y, ps.x, tl.y, pen)); //2-3
        marginLines.add(new ZShape.SimpleHLine(0, br.y, ps.x, br.y, pen)); //4-5
        marginLines.add(new ZShape.SimpleHLine(0, tl.y + hh, ps.x, tl.y + hh, pen)); //8-9
        marginLines.add(new ZShape.SimpleHLine(0, br.y - fh, ps.x, br.y - fh, pen)); //10-11

        header = new ZRect(tl.x, tl.y, br.x, tl.y + hh);
        body = new ZRect(tl.x, tl.y - hh, br.x, br.y - fh);
        footer = new ZRect(tl.x, br.y - fh, br.x, br.y);
    }

    /**
     *
     * ZPrintPreview.ZPrintPreviewControl
     */
    class ZPrintPreviewControl extends ZSheetStateControl {
        final static int STS_Margin_Ready = STATE_IDLE + 1;
        final static int STS_Marginning = STATE_IDLE + 2;
        ZShape.SimpleHLine bar;
        ZShape.Rectangle selectedMarginer;
        int state = STATE_IDLE;
        Cursor[] cursors;

        ZPrintPreviewControl(ZSheetState sheetState) {
            setModal(sheetState);

            _MarginHandler mh = new _MarginHandler();
            pagePane.addMouseMotionListener(mh);
            pagePane.addMouseListener(mh);
            editor.addListener(this);
        }

        /**
         * DOCUMENT ME!
         */
        public void setIdle() {
            pagePane.setCursor(cursors[ZSheetState.DEFAULT_CURSOR]);
            selectedMarginer = null;
            state = STATE_IDLE;
        }

        /**
         * DOCUMENT ME!
         *
         * @param modal
         */
        public void setModal(ZSheetState modal) {
            if (modal != null) {
                doc.setEditable(modal, true);
            }

            if (this.modal != null) {
                doc.setEditable(this.modal, false);
            }

            if ((modal == null) && (this.modal != null)) {
                pagePane.removeMouseMotionListener(this);
                pagePane.removeMouseListener(this);
                pagePane.removeKeyListener(this);
            } else if ((modal != null) && (this.modal == null)) {
                pagePane.addMouseMotionListener(this);
                pagePane.addMouseListener(this);
                pagePane.addKeyListener(this);
            }

            super.setModal(modal);
        }

        /**
         * DOCUMENT ME!
         *
         * @return
         */
        public ZSheetState getModal() {
            return modal;
        }

        /**
         * DOCUMENT ME!
         *
         * @param e
         */
        public void mouseDragged(MouseEvent e) {
            if (state == STATE_IDLE) //正在调整边距，不要添乱
            {
                super.mouseDragged(e);
            }
        }

        /**
         * DOCUMENT ME!
         *
         * @param e
         */
        public void mouseMoved(MouseEvent e) {
            if (state == STATE_IDLE) //正在调整边距，不要添乱
            {
                super.mouseMoved(e);
            }
        }

        /**
         * DOCUMENT ME!
         *
         * @param e
         */
        public void mouseReleased(MouseEvent e) {
            if (state == STATE_IDLE) //正在调整边距，不要添乱
            {
                super.mouseReleased(e);
            }
        }

        /**
         * DOCUMENT ME!
         *
         * @param ui
         */
        public void updateUI(ZDefaultUI ui) {
            cursors = new Cursor[5];
            cursors[ZSheetState.DEFAULT_CURSOR] = (Cursor) ui.get(ZDefaultUI.CURSOR_DEFAULT);
            cursors[ZSheetState.RESIZE_ROW_CURSOR] = (Cursor) ui.get(ZDefaultUI.CURSOR_ROW_RESIZE);
            cursors[ZSheetState.RESIZE_COL_CURSOR] = (Cursor) ui.get(ZDefaultUI.CURSOR_COL_RESIZE);
            cursors[ZSheetState.MOVE_CURSOR] = (Cursor) ui.get(ZDefaultUI.CURSOR_DRAG_READY);
            super.updateUI(ui);
        }

        /**
         * DOCUMENT ME!
         *
         * @return