107 lines
3.6 KiB
Java
107 lines
3.6 KiB
Java
/*
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ZZTextView.java
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*
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* Copyright (c) 1999, Ted Nelson and Tuomas Lukka
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*
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* You may use and distribute under the terms of either the GNU Lesser
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* General Public License, either version 2 of the license or,
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* at your choice, any later version. Alternatively, you may use and
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* distribute under the terms of the XPL.
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*
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* See the LICENSE.lgpl and LICENSE.xpl files for the specific terms of
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* the licenses.
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*
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* This software is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the README
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* file for more details.
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*
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*/
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/*
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* Written by Tuomas Lukka, rewritten to use AWT by Benja Fallenstein
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*/
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package org.gzigzag;
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import java.awt.event.*;
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import java.awt.*;
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/** A text view showing the contents of one cell (the cursor).
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* This is shown in a window of its own, using the AWT TextArea component,
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* to allow copy-and-paste functions as you know them from PUIs. Basically,
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* it's a dirty hack, because it's outside the usual GZZ framework.
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*/
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public class ZZTextView extends Frame implements ZZView {
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public static final String rcsid = "$Id: ZZTextView.java,v 1.16.2.3 2001/08/16 13:50:01 bfallenstein Exp $";
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static final boolean dbg = false;
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static final void p(String s) { if(dbg) System.out.println(s); }
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static final void pa(String s) { System.out.println(s); }
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ZZCell windowCell;
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/** The cell we show (i.e., the cell currently accursed).
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* If reraster is called, but the cell and its text haven't changed, we do
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* nothing, so that the cursor position will not be screwed. (The text
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* is not cached, instead the text in the TextArea component is used: this
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* way, if the TextArea itself is used for editing, the text we find there
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* will be the new text in the cell, so we will not screw the cursor
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* position either.)
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* <p>
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* Note that we simply ignore updates when we have the focus.
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*/
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ZZCell shown;
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/** Whether we're updating the content of the TextArea right now.
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* When we're updating (i.e., write stuff from the structure into
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* the text area), we obviously ignore events telling us the content
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* of the text area has changed.
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*/
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boolean isUpdating = false;
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/** Whether the text component currently has the focus. */
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boolean hasFocus;
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public ZZCell getViewcell() { return windowCell; }
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public void paintNow(float fract) {}
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TextArea txt = new TextArea("", 100, 100,
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TextArea.SCROLLBARS_VERTICAL_ONLY);
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public ZZTextView(ZZCell c) {
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windowCell = c;
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setLayout(new BorderLayout());
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add(txt, "Center");
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ZZUpdateManager.addView(this);
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txt.addTextListener(new TextListener() {
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public void textValueChanged(TextEvent e) {
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if(isUpdating) return;
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shown.setText(txt.getText());
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ZZCursorReal.setOffs(windowCell, txt.getCaretPosition());
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}
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});
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txt.addFocusListener(new FocusListener() {
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public void focusGained(FocusEvent e) { hasFocus = true; }
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public void focusLost(FocusEvent e) { hasFocus = false; }
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});
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setBounds(0, 0, 200, 300);
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setVisible(true);
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reraster();
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}
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public boolean reraster() {
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ZZCell accursed = ZZCursorReal.get(windowCell);
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if(!hasFocus && (!accursed.equals(shown) ||
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!accursed.getText().equals(txt.getText()))) {
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isUpdating = true;
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txt.setText(accursed.getText());
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int offs = ZZCursorReal.getOffs(windowCell);
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if(offs == ZZCursorReal.NO_OFFSET)
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txt.setCaretPosition(0);
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else
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txt.setCaretPosition(offs);
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shown = accursed;
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isUpdating = false;
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}
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return false;
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}
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}
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