+++ /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.TerminalPosition;
-import com.googlecode.lanterna.TerminalSize;
-
-import java.util.List;
-
-/**
- * Simple layout manager the puts all components on a single line, either horizontally or vertically.
- */
-public class LinearLayout implements LayoutManager {
- /**
- * This enum type will decide the alignment of a component on the counter-axis, meaning the horizontal alignment on
- * vertical {@code LinearLayout}s and vertical alignment on horizontal {@code LinearLayout}s.
- */
- public enum Alignment {
- /**
- * The component will be placed to the left (for vertical layouts) or top (for horizontal layouts)
- */
- Beginning,
- /**
- * The component will be placed horizontally centered (for vertical layouts) or vertically centered (for
- * horizontal layouts)
- */
- Center,
- /**
- * The component will be placed to the right (for vertical layouts) or bottom (for horizontal layouts)
- */
- End,
- /**
- * The component will be forced to take up all the horizontal space (for vertical layouts) or vertical space
- * (for horizontal layouts)
- */
- Fill,
- }
-
- private static class LinearLayoutData implements LayoutData {
- private final Alignment alignment;
-
- public LinearLayoutData(Alignment alignment) {
- this.alignment = alignment;
- }
- }
-
- /**
- * Creates a {@code LayoutData} for {@code LinearLayout} that assigns a component to a particular alignment on its
- * counter-axis, meaning the horizontal alignment on vertical {@code LinearLayout}s and vertical alignment on
- * horizontal {@code LinearLayout}s.
- * @param alignment Alignment to store in the {@code LayoutData} object
- * @return {@code LayoutData} object created for {@code LinearLayout}s with the specified alignment
- * @see Alignment
- */
- public static LayoutData createLayoutData(Alignment alignment) {
- return new LinearLayoutData(alignment);
- }
-
- private final Direction direction;
- private int spacing;
- private boolean changed;
-
- /**
- * Default constructor, creates a vertical {@code LinearLayout}
- */
- public LinearLayout() {
- this(Direction.VERTICAL);
- }
-
- /**
- * Standard constructor that creates a {@code LinearLayout} with a specified direction to position the components on
- * @param direction Direction for this {@code Direction}
- */
- public LinearLayout(Direction direction) {
- this.direction = direction;
- this.spacing = direction == Direction.HORIZONTAL ? 1 : 0;
- this.changed = true;
- }
-
- /**
- * Sets the amount of empty space to put in between components. For horizontal layouts, this is number of columns
- * (by default 1) and for vertical layouts this is number of rows (by default 0).
- * @param spacing Spacing between components, either in number of columns or rows depending on the direction
- * @return Itself
- */
- public LinearLayout setSpacing(int spacing) {
- this.spacing = spacing;
- this.changed = true;
- return this;
- }
-
- /**
- * Returns the amount of empty space to put in between components. For horizontal layouts, this is number of columns
- * (by default 1) and for vertical layouts this is number of rows (by default 0).
- * @return Spacing between components, either in number of columns or rows depending on the direction
- */
- public int getSpacing() {
- return spacing;
- }
-
- @Override
- public TerminalSize getPreferredSize(List<Component> components) {
- if(direction == Direction.VERTICAL) {
- return getPreferredSizeVertically(components);
- }
- else {
- return getPreferredSizeHorizontally(components);
- }
- }
-
- private TerminalSize getPreferredSizeVertically(List<Component> components) {
- int maxWidth = 0;
- int height = 0;
- for(Component component: components) {
- TerminalSize preferredSize = component.getPreferredSize();
- if(maxWidth < preferredSize.getColumns()) {
- maxWidth = preferredSize.getColumns();
- }
- height += preferredSize.getRows();
- }
- height += spacing * (components.size() - 1);
- return new TerminalSize(maxWidth, height);
- }
-
- private TerminalSize getPreferredSizeHorizontally(List<Component> components) {
- int maxHeight = 0;
- int width = 0;
- for(Component component: components) {
- TerminalSize preferredSize = component.getPreferredSize();
- if(maxHeight < preferredSize.getRows()) {
- maxHeight = preferredSize.getRows();
- }
- width += preferredSize.getColumns();
- }
- width += spacing * (components.size() - 1);
- return new TerminalSize(width, maxHeight);
- }
-
- @Override
- public boolean hasChanged() {
- return changed;
- }
-
- @Override
- public void doLayout(TerminalSize area, List<Component> components) {
- if(direction == Direction.VERTICAL) {
- doVerticalLayout(area, components);
- }
- else {
- doHorizontalLayout(area, components);
- }
- this.changed = false;
- }
-
- private void doVerticalLayout(TerminalSize area, List<Component> components) {
- int remainingVerticalSpace = area.getRows();
- int availableHorizontalSpace = area.getColumns();
- for(Component component: components) {
- if(remainingVerticalSpace <= 0) {
- component.setPosition(TerminalPosition.TOP_LEFT_CORNER);
- component.setSize(TerminalSize.ZERO);
- }
- else {
- LinearLayoutData layoutData = (LinearLayoutData)component.getLayoutData();
- Alignment alignment = Alignment.Beginning;
- if(layoutData != null) {
- alignment = layoutData.alignment;
- }
-
- TerminalSize preferredSize = component.getPreferredSize();
- TerminalSize decidedSize = new TerminalSize(
- Math.min(availableHorizontalSpace, preferredSize.getColumns()),
- Math.min(remainingVerticalSpace, preferredSize.getRows()));
- if(alignment == Alignment.Fill) {
- decidedSize = decidedSize.withColumns(availableHorizontalSpace);
- alignment = Alignment.Beginning;
- }
-
- TerminalPosition position = component.getPosition();
- position = position.withRow(area.getRows() - remainingVerticalSpace);
- switch(alignment) {
- case End:
- position = position.withColumn(availableHorizontalSpace - decidedSize.getColumns());
- break;
- case Center:
- position = position.withColumn((availableHorizontalSpace - decidedSize.getColumns()) / 2);
- break;
- case Beginning:
- default:
- position = position.withColumn(0);
- break;
- }
- component.setPosition(position);
- component.setSize(component.getSize().with(decidedSize));
- remainingVerticalSpace -= decidedSize.getRows() + spacing;
- }
- }
- }
-
- private void doHorizontalLayout(TerminalSize area, List<Component> components) {
- int remainingHorizontalSpace = area.getColumns();
- int availableVerticalSpace = area.getRows();
- for(Component component: components) {
- if(remainingHorizontalSpace <= 0) {
- component.setPosition(TerminalPosition.TOP_LEFT_CORNER);
- component.setSize(TerminalSize.ZERO);
- }
- else {
- LinearLayoutData layoutData = (LinearLayoutData)component.getLayoutData();
- Alignment alignment = Alignment.Beginning;
- if(layoutData != null) {
- alignment = layoutData.alignment;
- }
- TerminalSize preferredSize = component.getPreferredSize();
- TerminalSize decidedSize = new TerminalSize(
- Math.min(remainingHorizontalSpace, preferredSize.getColumns()),
- Math.min(availableVerticalSpace, preferredSize.getRows()));
- if(alignment == Alignment.Fill) {
- decidedSize = decidedSize.withRows(availableVerticalSpace);
- alignment = Alignment.Beginning;
- }
-
- TerminalPosition position = component.getPosition();
- position = position.withColumn(area.getColumns() - remainingHorizontalSpace);
- switch(alignment) {
- case End:
- position = position.withRow(availableVerticalSpace - decidedSize.getRows());
- break;
- case Center:
- position = position.withRow((availableVerticalSpace - decidedSize.getRows()) / 2);
- break;
- case Beginning:
- default:
- position = position.withRow(0);
- break;
- }
- component.setPosition(position);
- component.setSize(component.getSize().with(decidedSize));
- remainingHorizontalSpace -= decidedSize.getColumns() + spacing;
- }
- }
- }
-}
git://git.nikiroo.be / jvcard.git / blobdiff