/*
* @(#)TextTool.java
*
* Project: JHotdraw - a GUI framework for technical drawings
* http://www.jhotdraw.org
* http://jhotdraw.sourceforge.net
* Copyright: ?by the original author(s) and all contributors
* License: Lesser GNU Public License (LGPL)
* http://www.opensource.org/licenses/lgpl-license.html
*/
package research.tool;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.event.*;
import research.TextHolder;
import research.Figure;
import research.FloatingTextField;
import javax.swing.event.DocumentListener;
import javax.swing.event.DocumentEvent;
/**
* Tool to create new or edit existing text figures.
* The editing behavior is implemented by overlaying the
* Figure providing the text with a FloatingTextField.<p>
* A tool interaction is done once a Figure that is not
* a TextHolder is clicked.
*
* @see research.TextHolder
*
* @version <$CURRENT_VERSION$>
*/
public class TextTool extends CreationTool {
protected DocumentListener documentListener = new FloatingTextFieldDocumentListener();
protected FloatingTextField fTextField;
protected TextHolder fTypingTarget;
/**
* If the pressed figure is a TextHolder it can be edited otherwise
* a new text figure is created.
*/
public void mouseDown(MouseEvent e, int x, int y) {
TextHolder textHolder = null;
double scale = drawingView.getScale();
int realX = (int) (e.getX() / scale + 0.5);
int realY = (int) (e.getY() / scale + 0.5);
Figure pressedFigure = drawingView.getDrawing().findFigureInside(realX, realY);
if (pressedFigure instanceof TextHolder) {
textHolder = (TextHolder) pressedFigure;
if (!textHolder.acceptsTyping())
textHolder = null;
}
if (textHolder != null) {
beginEdit(textHolder);
return;
}
if (getTypingTarget() != null) {
endEdit();
} else {
super.mouseDown(e, x, y);
drawingView.checkDamage();
textHolder = (TextHolder) createdFigure;
beginEdit(textHolder);
}
}
public void mouseDrag(MouseEvent e, int x, int y) {
}
public void mouseUp(MouseEvent e, int x, int y) {
}
public void end() {
endEdit();
}
/**
* VTextIconTest whether the text tool is currently activated and is displaying
* a overlay TextFigure for accepting input.
*
* @return true, if the text tool has a accepting target TextFigure for its input, false otherwise
*/
public boolean isActivated() {
return getTypingTarget() != null;
}
protected void beginEdit(TextHolder figure) {
if (fTextField == null) {
fTextField = new FloatingTextField();
fTextField.addDocumentListener(documentListener);
}
if (figure != getTypingTarget() && getTypingTarget() != null) {
endEdit();
}
AffineTransform trans = new AffineTransform();
trans.scale(drawingView.getScale(), drawingView.getScale());
Font displayFont = figure.getFont().deriveFont(trans);
fTextField.createOverlay((Container) drawingView, displayFont);
fTextField.setBackground((Color) ((Figure) figure).getAttribute("fillColor"));
fTextField.setBounds(fieldBounds(figure), figure.getText());
setTypingTarget(figure);
}
public void endEdit() {
endEdit(true);
}
protected void endEdit(boolean release) {
if (getTypingTarget() != null) {
if (fTextField.getText().length() > 0) {
getTypingTarget().setText(fTextField.getText());
} else {
drawingView.getDrawing().remove(createdFigure);
}
setTypingTarget(null);
fTextField.endOverlay();
if (release)
getPropertyChangeSupport().firePropertyChange(Tool.TOOL_DONE, false, true);
}
}
protected Rectangle fieldBounds(TextHolder figure) {
Rectangle box = figure.textDisplayBox();
double scale = drawingView.getScale();
int realX = (int) (box.x * scale);
int realY = (int) (box.y * scale);
int realW = (int) (box.width * scale + 0.5);
int realH = (int) (box.height * scale + 0.5);
box.setRect(realX, realY, realW, realH);
return box;
}
protected void setTypingTarget(TextHolder newTypingTarget) {
fTypingTarget = newTypingTarget;
}
protected TextHolder getTypingTarget() {
return fTypingTarget;
}
protected class FloatingTextFieldDocumentListener implements DocumentListener {
public void changedUpdate(DocumentEvent evt) {
updateBounds();
}
public void insertUpdate(DocumentEvent evt) {
updateBounds();
}
public void removeUpdate(DocumentEvent evt) {
updateBounds();
}
}
protected void updateBounds() {
if ((getTypingTarget() != null) && (fTextField != null)) {
getTypingTarget().setText(fTextField.getText());
fTextField.updateBounds(fieldBounds(getTypingTarget()));
drawingView.checkDamage();
}
}
}