--- /dev/null 2014-06-16 13:42:37.248095559 +0400 +++ new/test/java/awt/event/helpers/lwcomponents/LWList.java 2014-06-18 17:52:53.000000000 +0400 @@ -0,0 +1,726 @@ +/* + * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code 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 + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +package test.java.awt.event.helpers.lwcomponents; + +import java.awt.*; +import java.awt.event.*; +import java.util.Vector; +import java.util.Enumeration; + +/** + * Remarks : Source for LeightWeight component - List. + * + * Scroll bar support is not available for this component, so if the + * items exceeds visibility those items will be truncated. Also, here + * double buffering is not used so there will be little bit flickering + * while it repaints. Item listener support is not enabled in this + * component. Listeners handled were Mouse, Key and Focus. + * + * @author R.Govindarajan (govind@siptech.co.in), G.N.V.Sekhar (sekharv@siptech.co.in) + */ + +public class LWList extends LWComponent implements ItemSelectable { + + // Constants used for component size + private final int MIN_WIDTH = 100; + private final int MIN_HEIGHT = 100; + private final int PREF_WIDTH = 100; + private final int PREF_HEIGHT = 100; + + // Constants used for setting color for component + private final Color BACK_COLOR = Color.white; + private final Color FRONT_COLOR = Color.black; + private final Color BORDER_COLOR = Color.darkGray; + private final Color FOCUS_COLOR = Color.blue; + private final Color FOCUS_FORECOLOR = Color.white; + private final Color FOCUS_ENABLED_COLOR = Color.red; + private final int BORDER_WIDTH = 2; + + private Vector stringList; // List of items + private Vector selList; // List of selected items + private int rows; // Visible rows + private int focusIndex, prevfocusIndex; + private Dimension minSize; + private Dimension prefSize; + private boolean pressed, eventOccurred, focusEnabled; + private boolean multipleMode; + + // Listeners handled for this component + private ActionListener actionListener; + private KeyListener keyListener; + private FocusListener focusListener; + private ItemListener itemListener; + + private static int nameCounter = 0; + + /** + * Creates a new list. + */ + public LWList() { + this(0); + } + + /** + * Creates a new list with the specified number of rows; + * multiple selection mode is disabled. + * + * @param i the number of rows + */ + public LWList(int i) { + this(i, false); + } + + /** + * Creates a new list with the specified number of rows and multiple selection mode. + * + * @param rows the number of rows + * @param flag determines whether the list allows multiple selections + */ + public LWList(int rows, boolean flag) { + multipleMode = flag; + this.rows = rows; + minSize = new Dimension(MIN_WIDTH, MIN_HEIGHT); + prefSize = new Dimension(PREF_WIDTH, PREF_HEIGHT); + stringList = new Vector(); + selList = new Vector(); + selList.addElement(0); + focusIndex = -1; + prevfocusIndex = focusIndex; + enableEvents(AWTEvent.MOUSE_EVENT_MASK); + enableEvents(AWTEvent.KEY_EVENT_MASK); + enableEvents(AWTEvent.FOCUS_EVENT_MASK); + enableEvents(AWTEvent.ITEM_EVENT_MASK); + setName(makeComponentName()); // set the name to the component + } + + String makeComponentName() { + String s = "LWList" + nameCounter++; + return s; + } + + /** + * Set whether the component is enabled or not. + * @param enabled if {@code true}, the component is to be enabled + */ + @Override + public void setEnabled(boolean enabled) { + super.setEnabled(enabled); + + if (enabled) { + enableEvents(AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK); + } else { + disableEvents(AWTEvent.MOUSE_EVENT_MASK | AWTEvent.MOUSE_MOTION_EVENT_MASK); + } + repaint(1); + } + + /** + * Set the selection mode. + * + * @param flag determines whether the list allows multiple selections + */ + public void setSelectionMode(boolean flag) { + multipleMode = flag; + } + + /** + * Check if the list allows multiple selections. + * + * @return {@code true} if the list allows multiple selections + */ + public boolean isMultipleMode() { + return multipleMode; + } + + /** + * Add the specified item. + * + * @param listItem the item + */ + public void add(String listItem) { + stringList.addElement(listItem); + invalidate(); + repaint(); + } + + /** + * Get minimum dimension for the list. + * + * @return the minimum dimensions for displaying + */ + @Override + public Dimension getMinimumSize() { + return minSize; + } + + /** + * Get the preferred size of the list. + * + * @return the preferred dimensions for displaying + */ + @Override + public Dimension getPreferredSize() { + return prefSize; + } + + /** + * Get the background color for the component. + * + * @return the background color for the component + */ + @Override + public Color getBackground() { + return BACK_COLOR; + } + + /** + * Get the foreground color for the component. + * + * @return the foreground color for the component + */ + @Override + public Color getForeground() { + return FRONT_COLOR; + } + + /** + * Get the border color for the component. + * + * @return the border color for the component + */ + public Color getBorder() { + return BORDER_COLOR; + } + + /** + * Get background color for the selected item. + * + * @return the color for the selected item + */ + public Color getFocusColor() { + return FOCUS_COLOR; + } + + /** + * Get foreground color for the selected item. + * + * @return the foreground color for the selected item + */ + public Color getFocusForeColor() { + return FOCUS_FORECOLOR; + } + + /** + * Get a "focus enabled" color - a small rectangle around the item + * should be drawn when the component got the focus. + * + * @return the "focus enabled" color + */ + public Color getFocusEnabledColor() { + return FOCUS_ENABLED_COLOR; + } + + /** + * Get border width. + * + * @return the border width + */ + public int getBorderWidth() { + return BORDER_WIDTH; + } + + /** + * Get the list item count. + * + * @return the count of items + */ + public int getItemCount() { + return stringList.size(); + } + + /** + * Get the specified item from the list. + * + * @param index the index + * @return the item string + */ + public String getItem(int index) { + return (String)stringList.elementAt(index); + } + + /** + * Get array of items from the list. + * + * @return the array of item strings + */ + public String[] getItems() { + String str[] = new String[getItemCount()]; + int count = 0; + for (Enumeration e = stringList.elements(); e.hasMoreElements(); ) { + str[count++] = (String)e.nextElement(); + } + return str; + } + + /** + * Check whether the component can be a focus owner (explicitly enabled here). + * + * @return {@code true} if the component is focusable + */ + @Override + public boolean isFocusTraversable() { + return true; + } + + /** + * Check whether mouse click point lies within the list of items. + * + * @param pt the click point + * @return {@code true} if the click point lies within the list of items + */ + @Override + public boolean contains(Point pt) { + Rectangle rect = new Rectangle(); + Dimension d = getSize(); + rect.x = getBorderWidth(); + rect.y = getBorderWidth(); + rect.width = d.width - (getBorderWidth() * 2); + rect.height = d.height - (getBorderWidth() * 2); + return rect.contains(pt); + } + + /** + * Given a click point the item that has to be selected is found from the list + * and focusIndex variable is set accordingly. + * + * @param pt the click point + */ + private void findSelectedIndex(Point pt) { + Font f = getFont(); + FontMetrics fm = getFontMetrics(f); + focusIndex = pt.y / fm.getHeight() - 1; + if (multipleMode) { + Integer fi = focusIndex; + if (selList.contains(fi)) { + int i = selList.indexOf(fi); + selList.removeElementAt(i); + } else { + selList.addElement(fi); + } + } + } + + /** + * Set index of the selected item. + * + * @param index the index + */ + public void setSelectedIndex(int index) { + prevfocusIndex = focusIndex; + focusIndex = index; + } + + /** + * Get the selected item index. + * + * @return the selected item index. + */ + public int getSelectedIndex() { + return focusIndex; + } + + /** + * Get an array of the selected Objects. + * + * @return array of the Objects + */ + @Override + public Object[] getSelectedObjects() { + int ai[] = getSelectedIndexes(); + Object aobj[] = new Object[selList.size()]; + for (int i = 0; i < selList.size(); i++) { + aobj[i] = stringList.elementAt(ai[i]); + } + return aobj; + } + + /** + * Get an array of the selected item indices. + * + * @return the array of the indices + */ + public int[] getSelectedIndexes() { + int ai[] = new int[selList.size()]; + for (int i = 0; i < selList.size(); i++) { + ai[i] = ((Integer)selList.elementAt(i)); + } + return ai; + } + + /** + * Add the specified item listener to receive item events from the list. + * + * @param itemlistener the item listener + */ + @Override + public synchronized void addItemListener(ItemListener itemlistener) { + itemListener = AWTEventMulticaster.add(itemListener, itemlistener); + enableEvents(AWTEvent.ITEM_EVENT_MASK); + } + + /** + * Remove the specified item listener so + * that it no longer receives item events from this list. + * + * @param itemlistener the item listener + */ + @Override + public synchronized void removeItemListener(ItemListener itemlistener) { + itemListener = AWTEventMulticaster.remove(itemListener, itemlistener); + } + + /** + * Add the specified action listener to receive action events from this list. + * + * @param listener the action listener + */ + public synchronized void addActionListener(ActionListener listener) { + actionListener = AWTEventMulticaster.add(actionListener, listener); + enableEvents(AWTEvent.MOUSE_EVENT_MASK); + } + + /** + * Remove the specified action listener so + * that it no longer receives action events from this list. + * + * @param listener the action listener + */ + public synchronized void removeActionListener(ActionListener listener) { + actionListener = AWTEventMulticaster.remove(actionListener, listener); + } + + /** + * Add the specified key listener to receive key events from this component. + * + * @param listener the key listener + */ + @Override + public synchronized void addKeyListener(KeyListener listener) { + keyListener = AWTEventMulticaster.add(keyListener, listener); + enableEvents(AWTEvent.KEY_EVENT_MASK); + } + + /** + * Remove the specified key listener so + * that it no longer receives key events from this component. + * + * @param listener the key listener + */ + @Override + public synchronized void removeKeyListener(KeyListener listener) { + keyListener = AWTEventMulticaster.remove(keyListener, listener); + } + + /** + * Add the specified focus listener to receive focus events + * from this component when it gains input focus. + * + * @param listener the focus listener + */ + @Override + public synchronized void addFocusListener(FocusListener listener) { + focusListener = AWTEventMulticaster.add(focusListener, listener); + enableEvents(AWTEvent.FOCUS_EVENT_MASK); + } + + /** + * Remove the specified focus listener so + * that it no longer receives focus events from this component. + * + * @param listener the focus listener + */ + @Override + public synchronized void removeFocusListener(FocusListener listener) { + focusListener = AWTEventMulticaster.remove(focusListener, listener); + } + + @Override + protected void processEvent(AWTEvent awtevent) { + + if (awtevent instanceof FocusEvent) { + processFocusEvent((FocusEvent)awtevent); + } else if (awtevent instanceof ItemEvent) { + processItemEvent((ItemEvent)awtevent); + } else if (awtevent instanceof KeyEvent) { + processKeyEvent((KeyEvent)awtevent); + } else if (awtevent instanceof MouseEvent) { + switch (awtevent.getID()) { + case MouseEvent.MOUSE_CLICKED: + case MouseEvent.MOUSE_PRESSED: + case MouseEvent.MOUSE_RELEASED: + case MouseEvent.MOUSE_ENTERED: + case MouseEvent.MOUSE_EXITED: + processMouseEvent((MouseEvent)awtevent); + break; + + case MouseEvent.MOUSE_MOVED: + case MouseEvent.MOUSE_DRAGGED: + super.processEvent((MouseEvent)awtevent); + break; + } + } else { + if (awtevent instanceof ComponentEvent) + super.processComponentEvent((ComponentEvent)awtevent); + else + super.processEvent(awtevent); + } + } + + protected void processItemEvent(ItemEvent itemevent) { + if (itemListener != null) { + itemListener.itemStateChanged(itemevent); + } + } + + @Override + protected void processFocusEvent(FocusEvent e) { + switch (e.getID()) { + case FocusEvent.FOCUS_GAINED: + if (focusListener != null) { focusListener.focusGained(e); } + if (getSelectedIndex() == -1) { setSelectedIndex(0); } + focusEnabled = true; + repaint(); + break; + case FocusEvent.FOCUS_LOST: + if (focusListener != null) { + focusListener.focusLost(e); + } + focusEnabled = false; + repaint(); + break; + } + super.processFocusEvent(e); + } + + @Override + protected void processKeyEvent(KeyEvent e) { + rows = getItemCount(); + + switch (e.getID()) { + + case KeyEvent.KEY_TYPED: + if (keyListener != null) { + keyListener.keyTyped(e); + } + break; + + case KeyEvent.KEY_PRESSED: + if (keyListener != null) { + keyListener.keyPressed(e); + } + if (e.getKeyCode() == KeyEvent.VK_DOWN) { + prevfocusIndex = focusIndex; + int index = getSelectedIndex() + 1; + if (index > rows) { break; } + setSelectedIndex(index); + processItemEvent(new ItemEvent(this, 0, index, 0)); + eventOccurred = true; + repaint(); + } else if (e.getKeyCode() == KeyEvent.VK_UP) { + int index = getSelectedIndex()-1; + if (index >= 0) { + setSelectedIndex(index); + if (e.getID() != 400) { + processItemEvent(new ItemEvent(this, 0, index, 0)); + } + eventOccurred = true; + repaint(); + } + } + break; + + case KeyEvent.KEY_RELEASED: + if (keyListener != null) { + keyListener.keyReleased(e); + } + if (e.getKeyCode() == KeyEvent.VK_ENTER) { + eventOccurred = true; + + // ActionEvent is fired here + if (actionListener != null) { + actionListener.actionPerformed( new ActionEvent( + this, ActionEvent.ACTION_PERFORMED, null)); + } + repaint(); + } + break; + } // switch + super.processKeyEvent(e); + } + + @Override + protected void processMouseEvent(MouseEvent e) { + switch (e.getID()) { + case MouseEvent.MOUSE_PRESSED: + pressed = true; + if (contains(e.getPoint())) { + findSelectedIndex(e.getPoint()); + processItemEvent(new ItemEvent(this, 0, focusIndex, 0)); + eventOccurred = true; + } + repaint(); + break; + + case MouseEvent.MOUSE_RELEASED: + if (pressed) { requestFocus(); } + + if (contains(e.getPoint())) { + findSelectedIndex(e.getPoint()); + eventOccurred = true; + } + // ActionEvent is fired here + if (actionListener != null) { + actionListener.actionPerformed(new ActionEvent( + this, ActionEvent.ACTION_PERFORMED, null)); + } + + if (pressed) { + pressed = false; + repaint(); + } + break; + } + super.processMouseEvent(e); + } + + @Override + /** + * Paint the list. + * + * @param g the graphics context to be used for testing + */ + public void paint(Graphics g) { + super.paint(g); + restrictGraphicsToClientArea(g); + + Point loc = getClientLocation(); + Dimension dim = getClientSize(); + Color prevColor = g.getColor(); + + // List border is drawn here + g.setColor(getBackground()); + g.fillRect(0, 0, dim.width - 2, dim.height - 2); + g.setColor(getBorder()); + g.drawRect(0, 0, dim.width - 2, dim.height - 2); + + if (getItemCount() > 0) { + Font f = getFont(); + if (f != null) { + String str[] = getItems(); + FontMetrics fm = getFontMetrics(f); + int drawRow = loc.x + getBorderWidth() + fm.getAscent(); + int drawCol = loc.y + getBorderWidth(); + int rectRow = loc.y + getBorderWidth(); + int i = 0; + + // Draw items (if the items exceeds visibility those items will be truncated + // as scrollbar support is not enabled + + for (; + i < str.length && drawRow < (dim.height - getBorderWidth()); + i++) { + if (fm.stringWidth(str[i]) < (dim.width - (getBorderWidth() * 2))) { + drawItem(g, i, drawCol, drawRow, rectRow, fm); + drawRow += fm.getHeight(); + rectRow += fm.getHeight(); + } else { + LWComponent.errorMsg("string width exceeds list width"); + LWComponent.errorMsg("Horizontal scrollbar support is not available"); + } + } // for + + if ( (drawRow > (dim.height - getBorderWidth())) && (str.length > i) ) { + //LWComponent.errorMsg("no of strings exceeds list height"); + //LWComponent.errorMsg("Vertical scrollbar support is not available"); + } + } else { LWComponent.errorMsg("Font not available.."); } + } + + eventOccurred = false; + g.setColor(prevColor); + unrestrictGraphicsFromClientArea(g); + } + + // Draw String items + private void drawItem(Graphics g, int listIndex, int drawCol, + int drawRow, int rectRow, FontMetrics fm) { + Point loc = getClientLocation(); + Dimension dim = getClientSize(); + String str = getItem(listIndex); + if (multipleMode) { + for (int i1 = 0; i1 < selList.size(); i1++) { + if (listIndex == ((Integer)selList.elementAt(i1))) { + g.setColor(getFocusColor()); + g.fillRect(loc.x + getBorderWidth(), + rectRow, + dim.width - getBorderWidth() * 2, + fm.getHeight()); + g.setColor(getFocusEnabledColor()); + g.drawRect(loc.x + getBorderWidth(), + rectRow, + dim.width - getBorderWidth() * 2, + fm.getHeight()); + } + } // for + } else { + if (listIndex == getSelectedIndex() && !multipleMode) { + g.setColor(getFocusColor()); + g.fillRect(loc.x + getBorderWidth(), + rectRow, + dim.width - getBorderWidth() * 2, + fm.getHeight()); + g.setColor(getFocusForeColor()); + } + if ((listIndex == prevfocusIndex) && (prevfocusIndex != getSelectedIndex()) && !multipleMode) { + g.setColor(getBackground()); + g.fillRect(loc.x + getBorderWidth(), + rectRow, + dim.width - getBorderWidth() * 2, + fm.getHeight()); + prevfocusIndex = getSelectedIndex(); + } + if (focusEnabled && listIndex == getSelectedIndex() && !multipleMode) { + g.setColor(getFocusEnabledColor()); + g.drawRect(loc.x + getBorderWidth(), + rectRow, + dim.width - getBorderWidth() * 2, + fm.getHeight()); + } + } + g.setColor(getForeground()); + g.drawString(str,drawCol,drawRow); + } + +} +