/*******************************************************************************
* This file is part of logisim-evolution.
*
* logisim-evolution is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* logisim-evolution is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with logisim-evolution. If not, see <http://www.gnu.org/licenses/>.
*
* Original code by Carl Burch (http://www.cburch.com), 2011.
* Subsequent modifications by :
* + Haute École Spécialisée Bernoise
* http://www.bfh.ch
* + Haute École du paysage, d'ingénierie et d'architecture de Genève
* http://hepia.hesge.ch/
* + Haute École d'Ingénierie et de Gestion du Canton de Vaud
* http://www.heig-vd.ch/
* The project is currently maintained by :
* + REDS Institute - HEIG-VD
* Yverdon-les-Bains, Switzerland
* http://reds.heig-vd.ch
*******************************************************************************/
package com.cburch.logisim.instance;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import com.cburch.logisim.circuit.Circuit;
import com.cburch.logisim.comp.Component;
import com.cburch.logisim.comp.ComponentDrawContext;
import com.cburch.logisim.comp.ComponentUserEvent;
import com.cburch.logisim.comp.TextField;
import com.cburch.logisim.comp.TextFieldEvent;
import com.cburch.logisim.comp.TextFieldListener;
import com.cburch.logisim.data.Attribute;
import com.cburch.logisim.data.AttributeEvent;
import com.cburch.logisim.data.AttributeListener;
import com.cburch.logisim.data.AttributeSet;
import com.cburch.logisim.data.Bounds;
import com.cburch.logisim.data.Location;
import com.cburch.logisim.gui.main.Canvas;
import com.cburch.logisim.proj.Action;
import com.cburch.logisim.tools.Caret;
import com.cburch.logisim.tools.SetAttributeAction;
import com.cburch.logisim.tools.TextEditable;
public class InstanceTextField implements AttributeListener, TextFieldListener,
TextEditable {
private Canvas canvas;
private InstanceComponent comp;
private TextField field;
private Attribute<String> labelAttr;
private Attribute<Font> fontAttr;
private boolean LabelIsVisable = true;
private Color fontColor;
private int fieldX;
private int fieldY;
private int halign;
private int valign;
InstanceTextField(InstanceComponent comp) {
this.comp = comp;
this.field = null;
this.labelAttr = null;
this.fontAttr = null;
fontColor = StdAttr.DEFAULT_LABEL_COLOR;
}
public void attributeListChanged(AttributeEvent e) {
}
public void attributeValueChanged(AttributeEvent e) {
Attribute<?> attr = e.getAttribute();
if (attr == labelAttr) {
updateField(comp.getAttributeSet());
} else if (attr == fontAttr) {
if (field != null)
field.setFont((Font) e.getValue());
} else if (attr == StdAttr.LABEL_COLOR) {
fontColor = (Color) e.getValue();
} else if (attr == StdAttr.LABEL_VISIBILITY) {
LabelIsVisable = (Boolean) e.getValue();
}
}
private void createField(AttributeSet attrs, String text) {
Font font = attrs.getValue(fontAttr);
field = new TextField(fieldX, fieldY, halign, valign, font);
field.setText(text);
field.addTextFieldListener(this);
}
void draw(Component comp, ComponentDrawContext context) {
if (field != null&&LabelIsVisable) {
Graphics g = context.getGraphics().create();
Color currentColor = g.getColor();
g.setColor(fontColor);
field.draw(g);
g.setColor(currentColor);
g.dispose();
}
}
Bounds getBounds(Graphics g) {
return field == null || !LabelIsVisable ? Bounds.EMPTY_BOUNDS : field.getBounds(g);
}
public Action getCommitAction(Circuit circuit, String oldText,
String newText) {
SetAttributeAction act = new SetAttributeAction(circuit,
Strings.getter("changeLabelAction"));
act.set(comp, labelAttr, newText);
return act;
}
public Caret getTextCaret(ComponentUserEvent event) {
canvas = event.getCanvas();
Graphics g = canvas.getGraphics();
// if field is absent, create it empty
// and if it is empty, just return a caret at its beginning
if (field == null)
createField(comp.getAttributeSet(), "");
String text = field.getText();
if (text == null || text.equals(""))
return field.getCaret(g, 0);
Bounds bds = field.getBounds(g);
if (bds.getWidth() < 4 || bds.getHeight() < 4) {
Location loc = comp.getLocation();
bds = bds.add(Bounds.create(loc).expand(2));
}
int x = event.getX();
int y = event.getY();
if (bds.contains(x, y))
return field.getCaret(g, x, y);
else
return null;
}
private boolean shouldRegister() {
return labelAttr != null || fontAttr != null;
}
public void textChanged(TextFieldEvent e) {
String prev = e.getOldText();
String next = e.getText();
if (!next.equals(prev)) {
comp.getAttributeSet().setValue(labelAttr, next);
}
}
void update(Attribute<String> labelAttr, Attribute<Font> fontAttr, int x,
int y, int halign, int valign) {
boolean wasReg = shouldRegister();
this.labelAttr = labelAttr;
this.fontAttr = fontAttr;
this.fieldX = x;
this.fieldY = y;
this.halign = halign;
this.valign = valign;
boolean shouldReg = shouldRegister();
AttributeSet attrs = comp.getAttributeSet();
if (attrs.containsAttribute(StdAttr.LABEL_VISIBILITY))
LabelIsVisable = attrs.getValue(StdAttr.LABEL_VISIBILITY);
if (!wasReg && shouldReg)
attrs.addAttributeListener(this);
if (wasReg && !shouldReg)
attrs.removeAttributeListener(this);
updateField(attrs);
}
private void updateField(AttributeSet attrs) {
String text = attrs.getValue(labelAttr);
if (text == null || text.equals("")) {
if (field != null) {
field.removeTextFieldListener(this);
field = null;
}
} else {
if (field == null) {
createField(attrs, text);
} else {
Font font = attrs.getValue(fontAttr);
if (font != null)
field.setFont(font);
field.setLocation(fieldX, fieldY, halign, valign);
field.setText(text);
}
}
}
}