-/**
+/*
* Jexer - Java Text User Interface
*
- * License: LGPLv3 or later
- *
- * This module is licensed under the GNU Lesser General Public License
- * Version 3. Please see the file "COPYING" in this directory for more
- * information about the GNU Lesser General Public License Version 3.
+ * The MIT License (MIT)
*
- * Copyright (C) 2015 Kevin Lamonte
+ * Copyright (C) 2017 Kevin Lamonte
*
- * This program 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.
+ * 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:
*
- * 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
- * General Public License for more details.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
- * 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/, or write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
+ * 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;
-import jexer.bits.CellAttributes;
-import jexer.bits.GraphicsChars;
import jexer.event.TKeypressEvent;
import jexer.event.TMouseEvent;
import static jexer.TKeypress.*;
/**
* TTreeView implements a simple tree view.
*/
-public class TTreeView extends TWidget {
-
- /**
- * Vertical scrollbar.
- */
- private TVScroller vScroller;
-
- /**
- * Horizontal scrollbar. Note package private access.
- */
- THScroller hScroller;
+public class TTreeView extends TScrollableWidget {
/**
* Root of the tree.
* If true, move the window to put the selected item in view. This
* normally only happens once after setting treeRoot.
*/
- public boolean centerWindow = false;
+ private boolean centerWindow = false;
/**
* The action to perform when the user selects an item.
* @param treeRoot ultimate root of tree
* @param centerWindow if true, move the window to put the root in view
*/
- public void setTreeRoot(final TTreeItem treeRoot, final boolean centerWindow) {
+ public void setTreeRoot(final TTreeItem treeRoot,
+ final boolean centerWindow) {
+
this.treeRoot = treeRoot;
this.centerWindow = centerWindow;
}
super(parent, x, y, width, height);
this.action = action;
+
+ vScroller = new TVScroller(this, getWidth() - 1, 0, getHeight() - 1);
+ hScroller = new THScroller(this, 0, getHeight() - 1, getWidth() - 1);
}
/**
}
/**
- * Set the new selected tree view item. Note package private access.
+ * Set the new selected tree view item.
*
* @param item new item that became selected
*/
- void setSelected(final TTreeItem item) {
+ public void setSelected(final TTreeItem item) {
if (item != null) {
item.setSelected(true);
}
}
/**
- * Perform user selection action. Note package private access.
+ * Perform user selection action.
*/
- void dispatch() {
+ public void dispatch() {
if (action != null) {
action.DO();
}
}
- /**
- * Update (or instantiate) vScroller and hScroller.
- */
- private void updateScrollers() {
- // Setup vertical scroller
- if (vScroller == null) {
- vScroller = new TVScroller(this, getWidth() - 1, 0,
- getHeight() - 1);
- vScroller.setValue(0);
- vScroller.setTopValue(0);
- }
- vScroller.setX(getWidth() - 1);
- vScroller.setHeight(getHeight() - 1);
- vScroller.setBigChange(getHeight() - 1);
-
- // Setup horizontal scroller
- if (hScroller == null) {
- hScroller = new THScroller(this, 0, getHeight() - 1,
- getWidth() - 1);
- hScroller.setValue(0);
- hScroller.setLeftValue(0);
- }
- hScroller.setY(getHeight() - 1);
- hScroller.setWidth(getWidth() - 1);
- hScroller.setBigChange(getWidth() - 1);
- }
-
/**
* Resize text and scrollbars for a new width/height.
*/
- public void reflow() {
+ @Override
+ public void reflowData() {
int selectedRow = 0;
boolean foundSelectedRow = false;
- updateScrollers();
if (treeRoot == null) {
return;
}
TTreeItem item = (TTreeItem) widget;
item.setInvisible(true);
item.setEnabled(false);
+ item.keyboardPrevious = null;
+ item.keyboardNext = null;
}
}
// Expand the tree into a linear list
getChildren().clear();
getChildren().addAll(treeRoot.expandTree("", true));
+
+ // Locate the selected row and maximum line width
for (TWidget widget: getChildren()) {
TTreeItem item = (TTreeItem) widget;
if (item == selectedItem) {
foundSelectedRow = true;
}
- if (foundSelectedRow == false) {
+ if (!foundSelectedRow) {
selectedRow++;
}
int lineWidth = item.getText().length()
- + item.getPrefix().length() + 4;
+ + item.getPrefix().length() + 4;
if (lineWidth > maxLineWidth) {
maxLineWidth = lineWidth;
}
}
+
if ((centerWindow) && (foundSelectedRow)) {
- if ((selectedRow < vScroller.getValue())
- || (selectedRow > vScroller.getValue() + getHeight() - 2)
+ if ((selectedRow < getVerticalValue())
+ || (selectedRow > getVerticalValue() + getHeight() - 2)
) {
- vScroller.setValue(selectedRow);
+ setVerticalValue(selectedRow);
centerWindow = false;
}
}
updatePositions();
// Rescale the scroll bars
- vScroller.setBottomValue(getChildren().size() - getHeight() + 1);
- if (vScroller.getBottomValue() < 0) {
- vScroller.setBottomValue(0);
+ setBottomValue(getChildren().size() - getHeight() + 1);
+ if (getBottomValue() < 0) {
+ setBottomValue(0);
}
- /*
- if (vScroller.getValue() > vScroller.getBottomValue()) {
- vScroller.setValue(vScroller.getBottomValue());
+ if (getVerticalValue() > getBottomValue()) {
+ setVerticalValue(getBottomValue());
}
- */
- hScroller.setRightValue(maxLineWidth - getWidth() + 3);
- if (hScroller.getRightValue() < 0) {
- hScroller.setRightValue(0);
+ setRightValue(maxLineWidth - getWidth() + 3);
+ if (getRightValue() < 0) {
+ setRightValue(0);
}
- /*
- if (hScroller.getValue() > hScroller.getRightValue()) {
- hScroller.setValue(hScroller.getRightValue());
+ if (getHorizontalValue() > getRightValue()) {
+ setHorizontalValue(getRightValue());
}
- */
getChildren().add(hScroller);
getChildren().add(vScroller);
}
return;
}
- int begin = vScroller.getValue();
+ int begin = getVerticalValue();
int topY = 0;
+
+ // As we walk the list we also adjust next/previous pointers,
+ // resulting in a doubly-linked list but only of the expanded items.
+ TTreeItem p = null;
+
for (int i = 0; i < getChildren().size(); i++) {
if (!(getChildren().get(i) instanceof TTreeItem)) {
- // Skip
+ // Skip the scrollbars
continue;
}
TTreeItem item = (TTreeItem) getChildren().get(i);
+ if (p != null) {
+ item.keyboardPrevious = p;
+ p.keyboardNext = item;
+ }
+ p = item;
+
if (i < begin) {
// Render invisible
item.setEnabled(false);
item.setWidth(getWidth() - 1);
topY++;
}
+
}
/**
@Override
public void onMouseDown(final TMouseEvent mouse) {
if (mouse.isMouseWheelUp()) {
- vScroller.decrement();
+ verticalDecrement();
} else if (mouse.isMouseWheelDown()) {
- vScroller.increment();
+ verticalIncrement();
} else {
// Pass to children
super.onMouseDown(mouse);
}
// Update the screen after the scrollbars have moved
- reflow();
+ reflowData();
}
/**
* @param mouse mouse button release event
*/
@Override
- public void onMouseUp(TMouseEvent mouse) {
+ public void onMouseUp(final TMouseEvent mouse) {
// Pass to children
super.onMouseDown(mouse);
// Update the screen after any thing has expanded/contracted
- reflow();
+ reflowData();
}
/**
*/
@Override
public void onKeypress(final TKeypressEvent keypress) {
- if (keypress.equals(kbLeft)) {
- hScroller.decrement();
- } else if (keypress.equals(kbRight)) {
- hScroller.increment();
- } else if (keypress.equals(kbUp)) {
- vScroller.decrement();
- } else if (keypress.equals(kbDown)) {
- vScroller.increment();
- } else if (keypress.equals(kbPgUp)) {
- vScroller.bigDecrement();
- } else if (keypress.equals(kbPgDn)) {
- vScroller.bigIncrement();
+ if (keypress.equals(kbShiftLeft)
+ || keypress.equals(kbCtrlLeft)
+ || keypress.equals(kbAltLeft)
+ ) {
+ horizontalDecrement();
+ } else if (keypress.equals(kbShiftRight)
+ || keypress.equals(kbCtrlRight)
+ || keypress.equals(kbAltRight)
+ ) {
+ horizontalIncrement();
+ } else if (keypress.equals(kbShiftUp)
+ || keypress.equals(kbCtrlUp)
+ || keypress.equals(kbAltUp)
+ ) {
+ verticalDecrement();
+ } else if (keypress.equals(kbShiftDown)
+ || keypress.equals(kbCtrlDown)
+ || keypress.equals(kbAltDown)
+ ) {
+ verticalIncrement();
+ } else if (keypress.equals(kbShiftPgUp)
+ || keypress.equals(kbCtrlPgUp)
+ || keypress.equals(kbAltPgUp)
+ ) {
+ bigVerticalDecrement();
+ } else if (keypress.equals(kbShiftPgDn)
+ || keypress.equals(kbCtrlPgDn)
+ || keypress.equals(kbAltPgDn)
+ ) {
+ bigVerticalIncrement();
} else if (keypress.equals(kbHome)) {
- vScroller.toTop();
+ toTop();
} else if (keypress.equals(kbEnd)) {
- vScroller.toBottom();
+ toBottom();
} else if (keypress.equals(kbEnter)) {
if (selectedItem != null) {
dispatch();
}
+ } else if (keypress.equals(kbUp)) {
+ // Select the previous item
+ if (selectedItem != null) {
+ TTreeItem oldItem = selectedItem;
+ if (selectedItem.keyboardPrevious != null) {
+ setSelected(selectedItem.keyboardPrevious);
+ if (oldItem.getY() == 0) {
+ verticalDecrement();
+ }
+ }
+ }
+ } else if (keypress.equals(kbDown)) {
+ // Select the next item
+ if (selectedItem != null) {
+ TTreeItem oldItem = selectedItem;
+ if (selectedItem.keyboardNext != null) {
+ setSelected(selectedItem.keyboardNext);
+ if (oldItem.getY() == getHeight() - 2) {
+ verticalIncrement();
+ }
+ }
+ }
+ } else if (keypress.equals(kbTab)) {
+ getParent().switchWidget(true);
+ return;
+ } else if (keypress.equals(kbShiftTab)
+ || keypress.equals(kbBackTab)) {
+ getParent().switchWidget(false);
+ return;
+ } else if (selectedItem != null) {
+ // Give the TTreeItem a chance to handle arrow keys
+ selectedItem.onKeypress(keypress);
} else {
- // Pass other keys (tab etc.) on
+ // Pass other keys (tab etc.) on to TWidget's handler.
super.onKeypress(keypress);
+ return;
}
// Update the screen after any thing has expanded/contracted
- reflow();
+ reflowData();
}
}
git://git.nikiroo.be / fanfix.git / blobdiff