+++ /dev/null
-/*
- * Jexer - Java Text User Interface
- *
- * The MIT License (MIT)
- *
- * Copyright (C) 2019 Kevin Lamonte
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * @author Kevin Lamonte [kevin.lamonte@gmail.com]
- * @version 1
- */
-package jexer.ttree;
-
-import java.util.ArrayList;
-import java.util.List;
-
-import jexer.TWidget;
-import jexer.bits.CellAttributes;
-import jexer.bits.GraphicsChars;
-import jexer.bits.StringUtils;
-import jexer.event.TKeypressEvent;
-import jexer.event.TMouseEvent;
-import static jexer.TKeypress.*;
-
-/**
- * TTreeItem is a single item in a tree view.
- */
-public class TTreeItem extends TWidget {
-
- // ------------------------------------------------------------------------
- // Variables --------------------------------------------------------------
- // ------------------------------------------------------------------------
-
- /**
- * Hang onto reference to my parent TTreeView so I can call its reflow()
- * when I add a child node.
- */
- private TTreeView view;
-
- /**
- * Displayable text for this item.
- */
- private String text;
-
- /**
- * If true, this item is expanded in the tree view.
- */
- private boolean expanded = true;
-
- /**
- * If true, this item can be expanded in the tree view.
- */
- private boolean expandable = false;
-
- /**
- * The vertical bars and such along the left side.
- */
- private String prefix = "";
-
- /**
- * Tree level.
- */
- protected int level = 0;
-
- /**
- * True means selected.
- */
- private boolean selected = false;
-
- /**
- * True means select-able.
- */
- private boolean selectable = true;
-
- /**
- * Whether or not this item is last in its parent's list of children.
- */
- private boolean last = false;
-
- /**
- * Pointer to the previous keyboard-navigable item (kbUp). Note package
- * private access.
- */
- TTreeItem keyboardPrevious = null;
-
- /**
- * Pointer to the next keyboard-navigable item (kbDown). Note package
- * private access.
- */
- TTreeItem keyboardNext = null;
-
- // ------------------------------------------------------------------------
- // Constructors -----------------------------------------------------------
- // ------------------------------------------------------------------------
-
- /**
- * Public constructor.
- *
- * @param view root TTreeView
- * @param text text for this item
- * @param expanded if true, have it expanded immediately
- */
- public TTreeItem(final TTreeView view, final String text,
- final boolean expanded) {
-
- super(view, 0, 0, view.getWidth() - 3, 1);
-
- this.text = text;
- this.expanded = expanded;
- this.view = view;
-
- if (view.getTreeRoot() == null) {
- view.setTreeRoot(this);
- } else {
- view.alignTree();
- }
- }
-
- // ------------------------------------------------------------------------
- // Event handlers ---------------------------------------------------------
- // ------------------------------------------------------------------------
-
- /**
- * Handle mouse release events.
- *
- * @param mouse mouse button release event
- */
- @Override
- public void onMouseUp(final TMouseEvent mouse) {
- if ((mouse.getX() == (getExpanderX() - view.getLeftColumn()))
- && (mouse.getY() == 0)
- ) {
- if (level == 0) {
- // Root node can't switch.
- return;
- }
- if (selectable) {
- // Flip expanded flag
- expanded = !expanded;
- if (expanded == false) {
- // Unselect children that became invisible
- unselect();
- }
- view.setSelected(this, false);
- }
- // Let subclasses do something with this
- onExpand();
-
- // Update the screen after any thing has expanded/contracted
- view.alignTree();
- } else if (mouse.getY() == 0) {
- // Do the action associated with this item.
- view.setSelected(this, false);
- view.dispatch();
- }
- }
-
- /**
- * Called when this item is expanded or collapsed. this.expanded will be
- * true if this item was just expanded from a mouse click or keypress.
- */
- public void onExpand() {
- // Default: do nothing.
- if (!expandable) {
- return;
- }
- }
-
- /**
- * Handle keystrokes.
- *
- * @param keypress keystroke event
- */
- @Override
- public void onKeypress(final TKeypressEvent keypress) {
- if (keypress.equals(kbLeft)
- || keypress.equals(kbRight)
- || keypress.equals(kbSpace)
- ) {
- if (level == 0) {
- // Root node can't switch.
- return;
- }
- if (selectable) {
- // Flip expanded flag
- expanded = !expanded;
- if (expanded == false) {
- // Unselect children that became invisible
- unselect();
- }
- view.setSelected(this, false);
- }
- // Let subclasses do something with this
- onExpand();
- } else if (keypress.equals(kbEnter)) {
- // Do the action associated with this item.
- view.dispatch();
- } else {
- // Pass other keys (tab etc.) on to TWidget's handler.
- super.onKeypress(keypress);
- }
- }
-
- // ------------------------------------------------------------------------
- // TWidget ----------------------------------------------------------------
- // ------------------------------------------------------------------------
-
- /**
- * Draw this item to a window.
- */
- @Override
- public void draw() {
- if ((getY() < 0) || (getY() > getParent().getHeight() - 1)) {
- return;
- }
-
- int offset = -view.getLeftColumn();
-
- CellAttributes color = getTheme().getColor("ttreeview");
- CellAttributes textColor = getTheme().getColor("ttreeview");
- CellAttributes expanderColor = getTheme().getColor("ttreeview.expandbutton");
- CellAttributes selectedColor = getTheme().getColor("ttreeview.selected");
-
- if (!getParent().isAbsoluteActive()) {
- color = getTheme().getColor("ttreeview.inactive");
- textColor = getTheme().getColor("ttreeview.inactive");
- selectedColor = getTheme().getColor("ttreeview.selected.inactive");
- }
-
- if (!selectable) {
- textColor = getTheme().getColor("ttreeview.unreadable");
- }
-
- // Blank out the background
- hLineXY(0, 0, getWidth(), ' ', color);
-
- String line = prefix;
- if (level > 0) {
- if (last) {
- line += GraphicsChars.CP437[0xC0];
- } else {
- line += GraphicsChars.CP437[0xC3];
- }
- line += GraphicsChars.CP437[0xC4];
- if (expandable) {
- line += "[ ] ";
- } else {
- line += " ";
- }
- }
- putStringXY(offset, 0, line, color);
- if (selected) {
- putStringXY(offset + StringUtils.width(line), 0, text, selectedColor);
- } else {
- putStringXY(offset + StringUtils.width(line), 0, text, textColor);
- }
- if ((level > 0) && (expandable)) {
- if (expanded) {
- putCharXY(offset + getExpanderX(), 0, '-', expanderColor);
- } else {
- putCharXY(offset + getExpanderX(), 0, '+', expanderColor);
- }
- }
- }
-
- // ------------------------------------------------------------------------
- // TTreeItem --------------------------------------------------------------
- // ------------------------------------------------------------------------
-
- /**
- * Get the parent TTreeView.
- *
- * @return the parent TTreeView
- */
- public final TTreeView getTreeView() {
- return view;
- }
-
- /**
- * Get the displayable text for this item.
- *
- * @return the displayable text for this item
- */
- public final String getText() {
- return text;
- }
-
- /**
- * Set the displayable text for this item.
- *
- * @param text the displayable text for this item
- */
- public final void setText(final String text) {
- this.text = text;
- }
-
- /**
- * Get expanded value.
- *
- * @return if true, this item is expanded
- */
- public final boolean isExpanded() {
- return expanded;
- }
-
- /**
- * Set expanded value.
- *
- * @param expanded new value
- */
- public final void setExpanded(final boolean expanded) {
- if (level == 0) {
- // Root node can't be unexpanded, ever.
- this.expanded = true;
- return;
- }
- if (level > 0) {
- this.expanded = expanded;
- }
- }
-
- /**
- * Get expandable value.
- *
- * @return if true, this item is expandable
- */
- public final boolean isExpandable() {
- return expandable;
- }
-
- /**
- * Set expandable value.
- *
- * @param expandable new value
- */
- public final void setExpandable(final boolean expandable) {
- if (level == 0) {
- // Root node can't be unexpanded, ever.
- this.expandable = true;
- return;
- }
- if (level > 0) {
- this.expandable = expandable;
- }
- }
-
- /**
- * Get the vertical bars and such along the left side.
- *
- * @return the vertical bars and such along the left side
- */
- public final String getPrefix() {
- return prefix;
- }
-
- /**
- * Get selected value.
- *
- * @return if true, this item is selected
- */
- public final boolean isSelected() {
- return selected;
- }
-
- /**
- * Set selected value.
- *
- * @param selected new value
- */
- public final void setSelected(final boolean selected) {
- this.selected = selected;
- }
-
- /**
- * Set selectable value.
- *
- * @param selectable new value
- */
- public final void setSelectable(final boolean selectable) {
- this.selectable = selectable;
- }
-
- /**
- * Get the length of the widest item to display.
- *
- * @return the maximum number of columns for this item or its children
- */
- public int getMaximumColumn() {
- int max = prefix.length() + 4 + StringUtils.width(text);
- for (TWidget widget: getChildren()) {
- TTreeItem item = (TTreeItem) widget;
- int n = item.prefix.length() + 4 + StringUtils.width(item.text);
- if (n > max) {
- max = n;
- }
- }
- return max;
- }
-
- /**
- * Recursively expand the tree into a linear array of items.
- *
- * @param prefix vertical bar of parent levels and such that is set on
- * each child
- * @param last if true, this is the "last" leaf node of a tree
- * @return additional items to add to the array
- */
- public List<TTreeItem> expandTree(final String prefix, final boolean last) {
- List<TTreeItem> array = new ArrayList<TTreeItem>();
- this.last = last;
- this.prefix = prefix;
- array.add(this);
-
- if ((getChildren().size() == 0) || !expanded) {
- return array;
- }
-
- String newPrefix = prefix;
- if (level > 0) {
- if (last) {
- newPrefix += " ";
- } else {
- newPrefix += GraphicsChars.CP437[0xB3];
- newPrefix += ' ';
- }
- }
- for (int i = 0; i < getChildren().size(); i++) {
- TTreeItem item = (TTreeItem) getChildren().get(i);
- if (i == getChildren().size() - 1) {
- array.addAll(item.expandTree(newPrefix, true));
- } else {
- array.addAll(item.expandTree(newPrefix, false));
- }
- }
- return array;
- }
-
- /**
- * Get the x spot for the + or - to expand/collapse.
- *
- * @return column of the expand/collapse button
- */
- private int getExpanderX() {
- if ((level == 0) || (!expandable)) {
- return 0;
- }
- return prefix.length() + 3;
- }
-
- /**
- * Recursively unselect me and my children.
- */
- public void unselect() {
- if (selected == true) {
- selected = false;
- view.setSelected(null, false);
- }
- for (TWidget widget: getChildren()) {
- if (widget instanceof TTreeItem) {
- TTreeItem item = (TTreeItem) widget;
- item.unselect();
- }
- }
- }
-
-}
git://git.nikiroo.be / fanfix.git / blobdiff