+++ /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;
-
-/**
- * Simple labeled button with an optional action attached to it, you trigger the action by pressing the Enter key on the
- * keyboard when the component is in focus.
- * @author Martin
- */
-public class Button extends AbstractInteractableComponent<Button> {
- private final Runnable action;
- private String label;
-
- /**
- * Creates a new button with a specific label and no attached action. Why would you need this? I have no idea.
- * @param label Label to put on the button
- */
- public Button(String label) {
- this(label, new Runnable() {
- @Override
- public void run() {
- }
- });
- }
-
- /**
- * Creates a new button with a label and an associated action to fire when triggered by the user
- * @param label Label to put on the button
- * @param action What action to fire when the user triggers the button by pressing the enter key
- */
- public Button(String label, Runnable action) {
- this.action = action;
- setLabel(label);
- }
-
- @Override
- protected ButtonRenderer createDefaultRenderer() {
- return new DefaultButtonRenderer();
- }
-
- @Override
- public synchronized TerminalPosition getCursorLocation() {
- return getRenderer().getCursorLocation(this);
- }
-
- @Override
- public synchronized Result handleKeyStroke(KeyStroke keyStroke) {
- if(keyStroke.getKeyType() == KeyType.Enter) {
- action.run();
- return Result.HANDLED;
- }
- return super.handleKeyStroke(keyStroke);
- }
-
- /**
- * Updates the label on the button to the specified string
- * @param label New label to use on the button
- */
- public final synchronized void setLabel(String label) {
- if(label == null) {
- throw new IllegalArgumentException("null label to a button is not allowed");
- }
- if(label.isEmpty()) {
- label = " ";
- }
- this.label = label;
- invalidate();
- }
-
- /**
- * Returns the label current assigned to the button
- * @return Label currently used by the button
- */
- public String getLabel() {
- return label;
- }
-
- @Override
- public String toString() {
- return "Button{" + label + "}";
- }
-
- /**
- * Helper interface that doesn't add any new methods but makes coding new button renderers a little bit more clear
- */
- public interface ButtonRenderer extends InteractableRenderer<Button> {
- }
-
- /**
- * This is the default button renderer that is used if you don't override anything. With this renderer, buttons are
- * drawn on a single line, with the label inside of "<" and ">".
- */
- public static class DefaultButtonRenderer implements ButtonRenderer {
- @Override
- public TerminalPosition getCursorLocation(Button button) {
- return new TerminalPosition(1 + getLabelShift(button, button.getSize()), 0);
- }
-
- @Override
- public TerminalSize getPreferredSize(Button button) {
- return new TerminalSize(Math.max(8, TerminalTextUtils.getColumnWidth(button.getLabel()) + 2), 1);
- }
-
- @Override
- public void drawComponent(TextGUIGraphics graphics, Button button) {
- if(button.isFocused()) {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getActive());
- }
- else {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getInsensitive());
- }
- graphics.fill(' ');
- graphics.setCharacter(0, 0, getThemeDefinition(graphics).getCharacter("LEFT_BORDER", '<'));
- graphics.setCharacter(graphics.getSize().getColumns() - 1, 0, getThemeDefinition(graphics).getCharacter("RIGHT_BORDER", '>'));
-
- if(button.isFocused()) {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getActive());
- }
- else {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getPreLight());
- }
- int labelShift = getLabelShift(button, graphics.getSize());
- graphics.setCharacter(1 + labelShift, 0, button.getLabel().charAt(0));
-
- if(TerminalTextUtils.getColumnWidth(button.getLabel()) == 1) {
- return;
- }
- if(button.isFocused()) {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getSelected());
- }
- else {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getNormal());
- }
- graphics.putString(1 + labelShift + 1, 0, button.getLabel().substring(1));
- }
-
- private int getLabelShift(Button button, TerminalSize size) {
- int availableSpace = size.getColumns() - 2;
- if(availableSpace <= 0) {
- return 0;
- }
- int labelShift = 0;
- int widthInColumns = TerminalTextUtils.getColumnWidth(button.getLabel());
- if(availableSpace > widthInColumns) {
- labelShift = (size.getColumns() - 2 - widthInColumns) / 2;
- }
- return labelShift;
- }
- }
-
- /**
- * Alternative button renderer that displays buttons with just the label and minimal decoration
- */
- public static class FlatButtonRenderer implements ButtonRenderer {
- @Override
- public TerminalPosition getCursorLocation(Button component) {
- return null;
- }
-
- @Override
- public TerminalSize getPreferredSize(Button component) {
- return new TerminalSize(TerminalTextUtils.getColumnWidth(component.getLabel()), 1);
- }
-
- @Override
- public void drawComponent(TextGUIGraphics graphics, Button button) {
- if(button.isFocused()) {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getActive());
- }
- else {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getInsensitive());
- }
- graphics.fill(' ');
- if(button.isFocused()) {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getSelected());
- }
- else {
- graphics.applyThemeStyle(getThemeDefinition(graphics).getNormal());
- }
- graphics.putString(0, 0, button.getLabel());
- }
- }
-
- private static ThemeDefinition getThemeDefinition(TextGUIGraphics graphics) {
- return graphics.getThemeDefinition(Button.class);
- }
-}
git://git.nikiroo.be / jvcard.git / blobdiff