/* Copyright (c) 2010, Carl Burch. License information is located in the
* com.cburch.logisim.Main source code and at www.cburch.com/logisim/. */
package com.cburch.draw.tools;
import java.awt.Cursor;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.util.Collections;
import java.util.List;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.Icon;
import javax.swing.InputMap;
import javax.swing.KeyStroke;
import com.cburch.draw.actions.ModelAddAction;
import com.cburch.draw.actions.ModelEditTextAction;
import com.cburch.draw.actions.ModelRemoveAction;
import com.cburch.draw.canvas.Canvas;
import com.cburch.draw.model.CanvasObject;
import com.cburch.draw.shapes.DrawAttr;
import com.cburch.draw.shapes.Text;
import com.cburch.draw.util.EditableLabelField;
import com.cburch.logisim.data.Attribute;
import com.cburch.logisim.data.AttributeEvent;
import com.cburch.logisim.data.AttributeListener;
import com.cburch.logisim.data.Location;
import com.cburch.logisim.util.Icons;
@SuppressWarnings("serial")
public class TextTool extends AbstractTool {
private class FieldListener extends AbstractAction implements AttributeListener {
@Override
public void actionPerformed(ActionEvent e) {
commitText(curCanvas);
}
@Override
public void attributeListChanged(AttributeEvent e) {
Text cur = curText;
if (cur != null) {
double zoom = curCanvas.getZoomFactor();
cur.getLabel().configureTextField(field, zoom);
curCanvas.repaint();
}
}
@Override
public void attributeValueChanged(AttributeEvent e) {
attributeListChanged(e);
}
}
private class CancelListener extends AbstractAction {
@Override
public void actionPerformed(ActionEvent e) {
cancelText(curCanvas);
}
}
private DrawingAttributeSet attrs;
private EditableLabelField field;
private FieldListener fieldListener;
private Text curText;
private Canvas curCanvas;
private boolean isTextNew;
public TextTool(DrawingAttributeSet attrs) {
this.attrs = attrs;
curText = null;
isTextNew = false;
field = new EditableLabelField();
fieldListener = new FieldListener();
InputMap fieldInput = field.getInputMap();
fieldInput.put(KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0),
"commit");
fieldInput.put(KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0),
"cancel");
ActionMap fieldAction = field.getActionMap();
fieldAction.put("commit", fieldListener);
fieldAction.put("cancel", new CancelListener());
}
@Override
public Icon getIcon() {
return Icons.getIcon("text.svg");
}
@Override
public Cursor getCursor(Canvas canvas) {
return Cursor.getPredefinedCursor(Cursor.TEXT_CURSOR);
}
@Override
public List<Attribute<?>> getAttributes() {
return DrawAttr.ATTRS_TEXT_TOOL;
}
@Override
public void toolSelected(Canvas canvas) {
cancelText(canvas);
}
@Override
public void toolDeselected(Canvas canvas) {
commitText(canvas);
}
@Override
public void mousePressed(Canvas canvas, MouseEvent e) {
if (curText != null) {
commitText(canvas);
}
Text clicked = null;
boolean found = false;
int mx = e.getX();
int my = e.getY();
Location mloc = Location.create(mx, my);
for (CanvasObject o : canvas.getModel().getObjectsFromTop()) {
if (o instanceof Text && o.contains(mloc, true)) {
clicked = (Text) o;
found = true;
break;
}
}
if (!found) {
clicked = attrs.applyTo(new Text(mx, my, ""));
}
curText = clicked;
curCanvas = canvas;
isTextNew = !found;
clicked.getLabel().configureTextField(field, canvas.getZoomFactor());
field.setText(clicked.getText());
canvas.add(field);
Point fieldLoc = field.getLocation();
double zoom = canvas.getZoomFactor();
fieldLoc.x = (int) Math.round(mx * zoom - fieldLoc.x);
fieldLoc.y = (int) Math.round(my * zoom - fieldLoc.y);
int caret = field.viewToModel(fieldLoc);
if (caret >= 0) {
field.setCaretPosition(caret);
}
field.requestFocus();
canvas.getSelection().setSelected(clicked, true);
canvas.getSelection().setHidden(Collections.singleton(clicked), true);
clicked.addAttributeListener(fieldListener);
canvas.repaint();
}
@Override
public void zoomFactorChanged(Canvas canvas) {
Text t = curText;
if (t != null) {
t.getLabel().configureTextField(field, canvas.getZoomFactor());
}
}
@Override
public void draw(Canvas canvas, Graphics g) {
// actually, there's nothing to do here - it's handled by the field
;
}
private void cancelText(Canvas canvas) {
Text cur = curText;
if (cur != null) {
curText = null;
cur.removeAttributeListener(fieldListener);
canvas.remove(field);
canvas.getSelection().clearSelected();
canvas.repaint();
}
}
private void commitText(Canvas canvas) {
Text cur = curText;
boolean isNew = isTextNew;
String newText = field.getText();
if (cur == null) {
return;
}
cancelText(canvas);
if (isNew) {
if (!newText.equals("")) {
cur.setText(newText);
canvas.doAction(new ModelAddAction(canvas.getModel(), cur));
}
} else {
String oldText = cur.getText();
if (newText.equals("")) {
canvas.doAction(new ModelRemoveAction(canvas.getModel(), cur));
} else if (!oldText.equals(newText)) {
canvas.doAction(new ModelEditTextAction(canvas.getModel(), cur,
newText));
}
}
}
}