+++ /dev/null
-/*
- * This file is part of lanterna (http://code.google.com/p/lanterna/).
- *
- * lanterna is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program 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 Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- *
- * Copyright (C) 2010-2015 Martin
- */
-package com.googlecode.lanterna.gui2;
-
-import com.googlecode.lanterna.TerminalTextUtils;
-import com.googlecode.lanterna.TerminalPosition;
-import com.googlecode.lanterna.TerminalSize;
-import com.googlecode.lanterna.graphics.ThemeDefinition;
-import com.googlecode.lanterna.input.KeyStroke;
-import com.googlecode.lanterna.input.KeyType;
-
-import java.util.List;
-import java.util.concurrent.CopyOnWriteArrayList;
-
-/**
- * The checkbox component looks like a regular checkbox that you can find in modern graphics user interfaces, a label
- * and a space that the user can toggle on and off by using enter or space keys.
- *
- * @author Martin
- */
-public class CheckBox extends AbstractInteractableComponent<CheckBox> {
-
- /**
- * Listener interface that can be used to catch user events on the check box
- */
- public interface Listener {
- /**
- * This is fired when the user has altered the checked state of this {@code CheckBox}
- * @param checked If the {@code CheckBox} is now toggled on, this is set to {@code true}, otherwise
- * {@code false}
- */
- void onStatusChanged(boolean checked);
- }
-
- private final List<Listener> listeners;
- private String label;
- private boolean checked;
-
- /**
- * Creates a new checkbox with no label, initially set to un-checked
- */
- public CheckBox() {
- this("");
- }
-
- /**
- * Creates a new checkbox with a specific label, initially set to un-checked
- * @param label Label to assign to the check box
- */
- public CheckBox(String label) {
- if(label == null) {
- throw new IllegalArgumentException("Cannot create a CheckBox with null label");
- }
- else if(label.contains("\n") || label.contains("\r")) {
- throw new IllegalArgumentException("Multiline checkbox labels are not supported");
- }
- this.listeners = new CopyOnWriteArrayList<Listener>();
- this.label = label;
- this.checked = false;
- }
-
- /**
- * Programmatically updated the check box to a particular checked state
- * @param checked If {@code true}, the check box will be set to toggled on, otherwise {@code false}
- * @return Itself
- */
- public synchronized CheckBox setChecked(final boolean checked) {
- this.checked = checked;
- runOnGUIThreadIfExistsOtherwiseRunDirect(new Runnable() {
- @Override
- public void run() {
- for(Listener listener : listeners) {
- listener.onStatusChanged(checked);
- }
- }
- });
- invalidate();
- return this;
- }
-
- /**
- * Returns the checked state of this check box
- * @return {@code true} if the check box is toggled on, otherwise {@code false}
- */
- public boolean isChecked() {
- return checked;
- }
-
- @Override
- public Result handleKeyStroke(KeyStroke keyStroke) {
- if((keyStroke.getKeyType() == KeyType.Character && keyStroke.getCharacter() == ' ') ||
- keyStroke.getKeyType() == KeyType.Enter) {
- setChecked(!isChecked());
- return Result.HANDLED;
- }
- return super.handleKeyStroke(keyStroke);
- }
-
- /**
- * Updates the label of the checkbox
- * @param label New label to assign to the check box
- * @return Itself
- */
- public synchronized CheckBox setLabel(String label) {
- if(label == null) {
- throw new IllegalArgumentException("Cannot set CheckBox label to null");
- }
- this.label = label;
- invalidate();
- return this;
- }
-
- /**
- * Returns the label of check box
- * @return Label currently assigned to the check box
- */
- public String getLabel() {
- return label;
- }
-
- /**
- * Adds a listener to this check box so that it will be notificed on certain user actions
- * @param listener Listener to fire events on
- * @return Itself
- */
- public CheckBox addListener(Listener listener) {
- if(listener != null && !listeners.contains(listener)) {
- listeners.add(listener);
- }
- return this;
- }
-
- /**
- * Removes a listener from this check box so that, if it was previously added, it will no long receive any events
- * @param listener Listener to remove from the check box
- * @return Itself
- */
- public CheckBox removeListener(Listener listener) {
- listeners.remove(listener);
- return this;
- }
-
- @Override
- protected CheckBoxRenderer createDefaultRenderer() {
- return new DefaultCheckBoxRenderer();
- }
-
- /**
- * Helper interface that doesn't add any new methods but makes coding new check box renderers a little bit more clear
- */
- public static abstract class CheckBoxRenderer implements InteractableRenderer<CheckBox> {
- }
-
- /**
- * The default renderer that is used unless overridden. This renderer will draw the checkbox label on the right side
- * of a "[ ]" block which will contain a "X" inside it if the check box has toggle status on
- */
- public static class DefaultCheckBoxRenderer extends CheckBoxRenderer {
- private static final TerminalPosition CURSOR_LOCATION = new TerminalPosition(1, 0);
- @Override
- public TerminalPosition getCursorLocation(CheckBox component) {
- return CURSOR_LOCATION;
- }
-
- @Override
- public TerminalSize getPreferredSize(CheckBox component) {
- int width = 3;
- if(!component.label.isEmpty()) {
- width += 1 + TerminalTextUtils.getColumnWidth(component.label);
- }
- return new TerminalSize(width, 1);
- }
-
- @Override
- public void drawComponent(TextGUIGraphics graphics, CheckBox component) {
- ThemeDefinition themeDefinition = graphics.getThemeDefinition(CheckBox.class);
- if(component.isFocused()) {
- graphics.applyThemeStyle(themeDefinition.getActive());
- }
- else {
- graphics.applyThemeStyle(themeDefinition.getNormal());
- }
-
- graphics.fill(' ');
- graphics.putString(4, 0, component.label);
-
- String head = "[" + (component.isChecked() ? themeDefinition.getCharacter("MARKER", 'x') : " ") + "]";
- if(component.isFocused()) {
- graphics.applyThemeStyle(themeDefinition.getPreLight());
- }
- else {
- graphics.applyThemeStyle(themeDefinition.getNormal());
- }
- graphics.putString(0, 0, head);
- }
- }
-}
git://git.nikiroo.be / jvcard.git / blobdiff