Java example source code file (XChoicePeer.java)
The XChoicePeer.java Java example source code/*
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* 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*
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package sun.awt.X11;
import java.awt.*;
import java.awt.peer.*;
import java.awt.event.*;
import sun.util.logging.PlatformLogger;
// FIXME: tab traversal should be disabled when mouse is captured (4816336)
// FIXME: key and mouse events should not be delivered to listeners when the Choice is unfurled. Must override handleNativeKey/MouseEvent (4816336)
// FIXME: test programmatic add/remove/clear/etc
// FIXME: account for unfurling at the edge of the screen
// Note: can't set x,y on layout(), 'cause moving the top-level to the
// edge of the screen won't call layout(). Just do it on paint, I guess
// TODO: make painting more efficient (i.e. when down arrow is pressed, only two items should need to be repainted.
public class XChoicePeer extends XComponentPeer implements ChoicePeer, ToplevelStateListener {
private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.X11.XChoicePeer");
private static final int MAX_UNFURLED_ITEMS = 10; // Maximum number of
// items to be displayed
// at a time in an
// unfurled Choice
// Description of these constants in ListHelper
public final static int TEXT_SPACE = 1;
public final static int BORDER_WIDTH = 1;
public final static int ITEM_MARGIN = 1;
public final static int SCROLLBAR_WIDTH = 15;
// SHARE THESE!
private static final Insets focusInsets = new Insets(0,0,0,0);
static final int WIDGET_OFFSET = 18;
// Stolen from Tiny
static final int TEXT_XPAD = 8;
static final int TEXT_YPAD = 6;
// FIXME: Motif uses a different focus color for the item within
// the unfurled Choice list and for when the Choice itself is focused and
// popped up.
static final Color focusColor = Color.black;
// TODO: there is a time value that the mouse is held down. If short
// enough, the Choice stays popped down. If long enough, Choice
// is furled when the mouse is released
private boolean unfurled = false; // Choice list is popped down
private boolean dragging = false; // Mouse was pressed and is being
// dragged over the (unfurled)
// Choice
private boolean mouseInSB = false; // Mouse is interacting with the
// scrollbar
private boolean firstPress = false; // mouse was pressed on
// furled Choice so we
// not need to furl the
// Choice when MOUSE_RELEASED occurred
// 6425067. Mouse was pressed on furled choice and dropdown list appeared over Choice itself
// and then there were no mouse movements until MOUSE_RELEASE.
// This scenario leads to ItemStateChanged as the choice logic uses
// MouseReleased event to send ItemStateChanged. To prevent it we should
// use a combination of firstPress and wasDragged variables.
// The only difference in dragging and wasDragged is: last one will not
// set to false on mouse ungrab. It become false after MouseRelased() finishes.
private boolean wasDragged = false;
private ListHelper helper;
private UnfurledChoice unfurledChoice;
// TODO: Choice remembers where it was scrolled to when unfurled - it's not
// always to the currently selected item.
// Indicates whether or not to paint selected item in the choice.
// Default is to paint
private boolean drawSelectedItem = true;
// If set, indicates components under which choice popup should be showed.
// The choice's popup width and location should be adjust to appear
// under both choice and alignUnder component.
private Component alignUnder;
// If cursor is outside of an unfurled Choice when the mouse is
// released, Choice item should NOT be updated. Remember the proper index.
private int dragStartIdx = -1;
// Holds the listener (XFileDialogPeer) which the processing events from the choice
// See 6240074 for more information
private XChoicePeerListener choiceListener;
XChoicePeer(Choice target) {
super(target);
}
void preInit(XCreateWindowParams params) {
super.preInit(params);
Choice target = (Choice)this.target;
int numItems = target.getItemCount();
unfurledChoice = new UnfurledChoice(target);
getToplevelXWindow().addToplevelStateListener(this);
helper = new ListHelper(unfurledChoice,
getGUIcolors(),
numItems,
false,
true,
false,
target.getFont(),
MAX_UNFURLED_ITEMS,
TEXT_SPACE,
ITEM_MARGIN,
BORDER_WIDTH,
SCROLLBAR_WIDTH);
}
void postInit(XCreateWindowParams params) {
super.postInit(params);
Choice target = (Choice)this.target;
int numItems = target.getItemCount();
// Add all items
for (int i = 0; i < numItems; i++) {
helper.add(target.getItem(i));
}
if (!helper.isEmpty()) {
helper.select(target.getSelectedIndex());
helper.setFocusedIndex(target.getSelectedIndex());
}
helper.updateColors(getGUIcolors());
updateMotifColors(getPeerBackground());
}
public boolean isFocusable() { return true; }
// 6399679. check if super.setBounds() actually changes the size of the
// component and then compare current Choice size with a new one. If
// they differs then hide dropdown menu
public void setBounds(int x, int y, int width, int height, int op) {
int oldX = this.x;
int oldY = this.y;
int oldWidth = this.width;
int oldHeight = this.height;
super.setBounds(x, y, width, height, op);
if (unfurled && (oldX != this.x || oldY != this.y || oldWidth != this.width || oldHeight != this.height) ) {
hidePopdownMenu();
}
}
public void focusGained(FocusEvent e) {
// TODO: only need to paint the focus bit
super.focusGained(e);
repaint();
}
/*
* Fix for 6246503 : Disabling a choice after selection locks keyboard, mouse and makes the system unusable, Xtoolkit
* if setEnabled(false) invoked we should close opened choice in
* order to prevent keyboard/mouse lock.
*/
public void setEnabled(boolean value) {
super.setEnabled(value);
helper.updateColors(getGUIcolors());
if (!value && unfurled){
hidePopdownMenu();
}
}
public void focusLost(FocusEvent e) {
// TODO: only need to paint the focus bit?
super.focusLost(e);
repaint();
}
void ungrabInputImpl() {
if (unfurled) {
unfurled = false;
dragging = false;
mouseInSB = false;
unfurledChoice.setVisible(false);
}
super.ungrabInputImpl();
}
void handleJavaKeyEvent(KeyEvent e) {
if (e.getID() == KeyEvent.KEY_PRESSED) {
keyPressed(e);
}
}
public void keyPressed(KeyEvent e) {
switch(e.getKeyCode()) {
// UP & DOWN are same if furled or unfurled
case KeyEvent.VK_DOWN:
case KeyEvent.VK_KP_DOWN: {
if (helper.getItemCount() > 1) {
helper.down();
int newIdx = helper.getSelectedIndex();
((Choice)target).select(newIdx);
postEvent(new ItemEvent((Choice)target,
ItemEvent.ITEM_STATE_CHANGED,
((Choice)target).getItem(newIdx),
ItemEvent.SELECTED));
repaint();
}
break;
}
case KeyEvent.VK_UP:
case KeyEvent.VK_KP_UP: {
if (helper.getItemCount() > 1) {
helper.up();
int newIdx = helper.getSelectedIndex();
((Choice)target).select(newIdx);
postEvent(new ItemEvent((Choice)target,
ItemEvent.ITEM_STATE_CHANGED,
((Choice)target).getItem(newIdx),
ItemEvent.SELECTED));
repaint();
}
break;
}
case KeyEvent.VK_PAGE_DOWN:
if (unfurled && !dragging) {
int oldIdx = helper.getSelectedIndex();
helper.pageDown();
int newIdx = helper.getSelectedIndex();
if (oldIdx != newIdx) {
((Choice)target).select(newIdx);
postEvent(new ItemEvent((Choice)target,
ItemEvent.ITEM_STATE_CHANGED,
((Choice)target).getItem(newIdx),
ItemEvent.SELECTED));
repaint();
}
}
break;
case KeyEvent.VK_PAGE_UP:
if (unfurled && !dragging) {
int oldIdx = helper.getSelectedIndex();
helper.pageUp();
int newIdx = helper.getSelectedIndex();
if (oldIdx != newIdx) {
((Choice)target).select(newIdx);
postEvent(new ItemEvent((Choice)target,
ItemEvent.ITEM_STATE_CHANGED,
((Choice)target).getItem(newIdx),
ItemEvent.SELECTED));
repaint();
}
}
break;
case KeyEvent.VK_ESCAPE:
case KeyEvent.VK_ENTER:
if (unfurled) {
if (dragging){
if (e.getKeyCode() == KeyEvent.VK_ESCAPE){
//This also happens on
// - MouseButton2,3, etc. press
// - ENTER press
helper.select(dragStartIdx);
} else { //KeyEvent.VK_ENTER:
int newIdx = helper.getSelectedIndex();
((Choice)target).select(newIdx);
postEvent(new ItemEvent((Choice)target,
ItemEvent.ITEM_STATE_CHANGED,
((Choice)target).getItem(newIdx),
ItemEvent.SELECTED));
}
}
hidePopdownMenu();
dragging = false;
wasDragged = false;
mouseInSB = false;
// See 6240074 for more information
if (choiceListener != null){
choiceListener.unfurledChoiceClosing();
}
}
break;
default:
if (unfurled) {
Toolkit.getDefaultToolkit().beep();
}
break;
}
}
public boolean handlesWheelScrolling() { return true; }
void handleJavaMouseWheelEvent(MouseWheelEvent e) {
if (unfurled && helper.isVSBVisible()) {
if (ListHelper.doWheelScroll(helper.getVSB(), null, e)) {
repaint();
}
}
}
void handleJavaMouseEvent(MouseEvent e) {
super.handleJavaMouseEvent(e);
int i = e.getID();
switch (i) {
case MouseEvent.MOUSE_PRESSED:
mousePressed(e);
break;
case MouseEvent.MOUSE_RELEASED:
mouseReleased(e);
break;
case MouseEvent.MOUSE_DRAGGED:
mouseDragged(e);
break;
}
}
public void mousePressed(MouseEvent e) {
/*
* fix for 5003166: a Choice on XAWT shouldn't react to any
* mouse button presses except left. This involves presses on
* Choice but not on opened part of choice.
*/
if (e.getButton() == MouseEvent.BUTTON1){
dragStartIdx = helper.getSelectedIndex();
if (unfurled) {
//fix 6259328: PIT: Choice scrolls when dragging the parent frame while drop-down is active, XToolkit
if (! (isMouseEventInChoice(e) ||
unfurledChoice.isMouseEventInside(e)))
{
hidePopdownMenu();
}
// Press on unfurled Choice. Highlight the item under the cursor,
// but don't send item event or set the text on the button yet
unfurledChoice.trackMouse(e);
}
else {
// Choice is up - unfurl it
grabInput();
unfurledChoice.toFront();
firstPress = true;
wasDragged = false;
unfurled = true;
}
}
}
/*
* helper method for mouseReleased routine
*/
void hidePopdownMenu(){
ungrabInput();
unfurledChoice.setVisible(false);
unfurled = false;
}
public void mouseReleased(MouseEvent e) {
if (unfurled) {
if (mouseInSB) {
unfurledChoice.trackMouse(e);
}
else {
// We pressed and dragged onto the Choice, or, this is the
// second release after clicking to make the Choice "stick"
// unfurled.
// This release should ungrab/furl, and set the new item if
// release was over the unfurled Choice.
// Fix for 6239944 : Choice shouldn't close its
// pop-down menu if user presses Mouse on Choice's Scrollbar
// some additional cases like releasing mouse outside
// of Choice are considered too
boolean isMouseEventInside = unfurledChoice.isMouseEventInside( e );
boolean isMouseInListArea = unfurledChoice.isMouseInListArea( e );
// Fixed 6318746: REG: File Selection is failing
// We shouldn't restore the selected item
// if the mouse was dragged outside the drop-down choice area
if (!helper.isEmpty() && !isMouseInListArea && dragging) {
// Set the selected item back how it was.
((Choice)target).select(dragStartIdx);
}
// Choice must be closed if user releases mouse on
// pop-down menu on the second click
if ( !firstPress && isMouseInListArea) {
hidePopdownMenu();
}
// Choice must be closed if user releases mouse
// outside of Choice's pop-down menu on the second click
if ( !firstPress && !isMouseEventInside) {
hidePopdownMenu();
}
//if user drags Mouse on pop-down menu, Scrollbar or
// outside the Choice
if ( firstPress && dragging) {
hidePopdownMenu();
}
/* this could happen when user has opened a Choice and
* released mouse button. Then he drags mouse on the
* Scrollbar and releases mouse again.
*/
if ( !firstPress && !isMouseInListArea &&
isMouseEventInside && dragging)
{
hidePopdownMenu();
}
if (!helper.isEmpty()) {
// Only update the Choice if the mouse button is released
// over the list of items.
if (unfurledChoice.isMouseInListArea(e)) {
int newIdx = helper.getSelectedIndex();
if (newIdx >= 0) {
// Update the selected item in the target now that
// the mouse selection is complete.
if (newIdx != dragStartIdx) {
((Choice)target).select(newIdx);
// NOTE: We get a repaint when Choice.select()
// calls our peer.select().
}
if (wasDragged && e.getButton() != MouseEvent.BUTTON1){
((Choice)target).select(dragStartIdx);
}
/*fix for 6239941 : Choice triggers ItemEvent when selecting an item with right mouse button, Xtoolkit
* We should generate ItemEvent if only
* LeftMouseButton used */
if (e.getButton() == MouseEvent.BUTTON1 &&
(!firstPress || wasDragged ))
{
postEvent(new ItemEvent((Choice)target,
ItemEvent.ITEM_STATE_CHANGED,
((Choice)target).getItem(newIdx),
ItemEvent.SELECTED));
}
// see 6240074 for more information
if (choiceListener != null) {
choiceListener.unfurledChoiceClosing();
}
}
}
}
// See 6243382 for more information
unfurledChoice.trackMouse(e);
}
}
dragging = false;
wasDragged = false;
firstPress = false;
dragStartIdx = -1;
}
public void mouseDragged(MouseEvent e) {
/*
* fix for 5003166. On Motif user are unable to drag
* mouse inside opened Choice if he drags the mouse with
* different from LEFT mouse button ( e.g. RIGHT or MIDDLE).
* This fix make impossible to drag mouse inside opened choice
* with other mouse buttons rather then LEFT one.
*/
if ( e.getModifiers() == MouseEvent.BUTTON1_MASK ){
dragging = true;
wasDragged = true;
unfurledChoice.trackMouse(e);
}
}
// Stolen from TinyChoicePeer
public Dimension getMinimumSize() {
// TODO: move this impl into ListHelper?
FontMetrics fm = getFontMetrics(target.getFont());
Choice c = (Choice)target;
int w = 0;
for (int i = c.countItems() ; i-- > 0 ;) {
w = Math.max(fm.stringWidth(c.getItem(i)), w);
}
return new Dimension(w + TEXT_XPAD + WIDGET_OFFSET,
fm.getMaxAscent() + fm.getMaxDescent() + TEXT_YPAD);
}
/*
* Layout the...
*/
public void layout() {
/*
Dimension size = target.getSize();
Font f = target.getFont();
FontMetrics fm = target.getFontMetrics(f);
String text = ((Choice)target).getLabel();
textRect.height = fm.getHeight();
checkBoxSize = getChoiceSize(fm);
// Note - Motif appears to use an left inset that is slightly
// scaled to the checkbox/font size.
cbX = borderInsets.left + checkBoxInsetFromText;
cbY = size.height / 2 - checkBoxSize / 2;
int minTextX = borderInsets.left + 2 * checkBoxInsetFromText + checkBoxSize;
// FIXME: will need to account for alignment?
// FIXME: call layout() on alignment changes
//textRect.width = fm.stringWidth(text);
textRect.width = fm.stringWidth(text == null ? "" : text);
textRect.x = Math.max(minTextX, size.width / 2 - textRect.width / 2);
textRect.y = size.height / 2 - textRect.height / 2 + borderInsets.top;
focusRect.x = focusInsets.left;
focusRect.y = focusInsets.top;
focusRect.width = size.width-(focusInsets.left+focusInsets.right)-1;
focusRect.height = size.height-(focusInsets.top+focusInsets.bottom)-1;
myCheckMark = AffineTransform.getScaleInstance((double)target.getFont().getSize() / MASTER_SIZE, (double)target.getFont().getSize() / MASTER_SIZE).createTransformedShape(MASTER_CHECKMARK);
*/
}
/**
* Paint the choice
*/
@Override
void paintPeer(final Graphics g) {
flush();
Dimension size = getPeerSize();
// TODO: when mouse is down over button, widget should be drawn depressed
g.setColor(getPeerBackground());
g.fillRect(0, 0, width, height);
drawMotif3DRect(g, 1, 1, width-2, height-2, false);
drawMotif3DRect(g, width - WIDGET_OFFSET, (height / 2) - 3, 12, 6, false);
if (!helper.isEmpty() && helper.getSelectedIndex() != -1) {
g.setFont(getPeerFont());
FontMetrics fm = g.getFontMetrics();
String lbl = helper.getItem(helper.getSelectedIndex());
if (lbl != null && drawSelectedItem) {
g.setClip(1, 1, width - WIDGET_OFFSET - 2, height);
if (isEnabled()) {
g.setColor(getPeerForeground());
g.drawString(lbl, 5, (height + fm.getMaxAscent()-fm.getMaxDescent())/2);
}
else {
g.setColor(getPeerBackground().brighter());
g.drawString(lbl, 5, (height + fm.getMaxAscent()-fm.getMaxDescent())/2);
g.setColor(getPeerBackground().darker());
g.drawString(lbl, 4, ((height + fm.getMaxAscent()-fm.getMaxDescent())/2)-1);
}
g.setClip(0, 0, width, height);
}
}
if (hasFocus()) {
paintFocus(g,focusInsets.left,focusInsets.top,size.width-(focusInsets.left+focusInsets.right)-1,size.height-(focusInsets.top+focusInsets.bottom)-1);
}
if (unfurled) {
unfurledChoice.repaint();
}
flush();
}
protected void paintFocus(Graphics g,
int x, int y, int w, int h) {
g.setColor(focusColor);
g.drawRect(x,y,w,h);
}
/*
* ChoicePeer methods stolen from TinyChoicePeer
*/
public void select(int index) {
helper.select(index);
helper.setFocusedIndex(index);
repaint();
}
public void add(String item, int index) {
helper.add(item, index);
repaint();
}
public void remove(int index) {
boolean selected = (index == helper.getSelectedIndex());
boolean visibled = (index >= helper.firstDisplayedIndex() && index <= helper.lastDisplayedIndex());
helper.remove(index);
if (selected) {
if (helper.isEmpty()) {
helper.select(-1);
}
else {
helper.select(0);
}
}
/*
* Fix for 6248016
* After removing the item of the choice we need to reshape unfurled choice
* in order to keep actual bounds of the choice
*/
/*
* condition added only for performance
*/
if (!unfurled) {
// Fix 6292186: PIT: Choice is not refreshed properly when the last item gets removed, XToolkit
// We should take into account that there is no 'select' invoking (hence 'repaint')
// if the choice is empty (see Choice.java method removeNoInvalidate())
// The condition isn't 'visibled' since it would be cause of the twice repainting
if (helper.isEmpty()) {
repaint();
}
return;
}
/*
* condition added only for performance
* the count of the visible items changed
*/
if (visibled){
Rectangle r = unfurledChoice.placeOnScreen();
unfurledChoice.reshape(r.x, r.y, r.width, r.height);
return;
}
/*
* condition added only for performance
* the structure of visible items changed
* if removable item is non visible and non selected then there is no repaint
*/
if (visibled || selected){
repaint();
}
}
public void removeAll() {
helper.removeAll();
helper.select(-1);
/*
* Fix for 6248016
* After removing the item of the choice we need to reshape unfurled choice
* in order to keep actual bounds of the choice
*/
Rectangle r = unfurledChoice.placeOnScreen();
unfurledChoice.reshape(r.x, r.y, r.width, r.height);
repaint();
}
/**
* DEPRECATED: Replaced by add(String, int).
*/
public void addItem(String item, int index) {
add(item, index);
}
public void setFont(Font font) {
super.setFont(font);
helper.setFont(this.font);
}
public void setForeground(Color c) {
super.setForeground(c);
helper.updateColors(getGUIcolors());
}
public void setBackground(Color c) {
super.setBackground(c);
unfurledChoice.setBackground(c);
helper.updateColors(getGUIcolors());
updateMotifColors(c);
}
public void setDrawSelectedItem(boolean value) {
drawSelectedItem = value;
}
public void setAlignUnder(Component comp) {
alignUnder = comp;
}
// see 6240074 for more information
public void addXChoicePeerListener(XChoicePeerListener l){
choiceListener = l;
}
// see 6240074 for more information
public void removeXChoicePeerListener(){
choiceListener = null;
}
public boolean isUnfurled(){
return unfurled;
}
/* fix for 6261352. We should detect if current parent Window (containing a Choice) become iconified and hide pop-down menu with grab release.
* In this case we should hide pop-down menu.
*/
//calls from XWindowPeer. Could accept X-styled state events
public void stateChangedICCCM(int oldState, int newState) {
if (unfurled && oldState != newState){
hidePopdownMenu();
}
}
//calls from XFramePeer. Could accept Frame's states.
public void stateChangedJava(int oldState, int newState) {
if (unfurled && oldState != newState){
hidePopdownMenu();
}
}
/**************************************************************************/
/* Common functionality between List & Choice
/**************************************************************************/
/**
* Inner class for the unfurled Choice list
* Much, much more docs
*/
class UnfurledChoice extends XWindow /*implements XScrollbarClient*/ {
// First try - use Choice as the target
public UnfurledChoice(Component target) {
super(target);
}
// Override so we can do our own create()
public void preInit(XCreateWindowParams params) {
// A parent of this window is the target, at this point: wrong.
// Remove parent window; in the following preInit() call we'll calculate as a default
// a correct root window which is the proper parent for override redirect.
params.delete(PARENT_WINDOW);
super.preInit(params);
// Reset bounds(we'll set them later), set overrideRedirect
params.remove(BOUNDS);
params.add(OVERRIDE_REDIRECT, Boolean.TRUE);
}
// Generally, bounds should be:
// x = target.x
// y = target.y + target.height
// w = Max(target.width, getLongestItemWidth) + possible vertScrollbar
// h = Min(MAX_UNFURLED_ITEMS, target.getItemCount()) * itemHeight
Rectangle placeOnScreen() {
int numItemsDisplayed;
// Motif paints an empty Choice the same size as a single item
if (helper.isEmpty()) {
numItemsDisplayed = 1;
}
else {
int numItems = helper.getItemCount();
numItemsDisplayed = Math.min(MAX_UNFURLED_ITEMS, numItems);
}
Point global = XChoicePeer.this.toGlobal(0,0);
Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
if (alignUnder != null) {
Rectangle choiceRec = XChoicePeer.this.getBounds();
choiceRec.setLocation(0, 0);
choiceRec = XChoicePeer.this.toGlobal(choiceRec);
Rectangle alignUnderRec = new Rectangle(alignUnder.getLocationOnScreen(), alignUnder.getSize()); // TODO: Security?
Rectangle result = choiceRec.union(alignUnderRec);
// we've got the left and width, calculate top and height
width = result.width;
x = result.x;
y = result.y + result.height;
height = 2*BORDER_WIDTH +
numItemsDisplayed*(helper.getItemHeight()+2*ITEM_MARGIN);
} else {
x = global.x;
y = global.y + XChoicePeer.this.height;
width = Math.max(XChoicePeer.this.width,
helper.getMaxItemWidth() + 2 * (BORDER_WIDTH + ITEM_MARGIN + TEXT_SPACE) + (helper.isVSBVisible() ? SCROLLBAR_WIDTH : 0));
height = 2*BORDER_WIDTH +
numItemsDisplayed*(helper.getItemHeight()+2*ITEM_MARGIN);
}
// Don't run off the edge of the screen
if (x < 0) {
x = 0;
}
else if (x + width > screen.width) {
x = screen.width - width;
}
if (y + height > screen.height) {
y = global.y - height;
}
if (y < 0) {
y = 0;
}
return new Rectangle(x, y, width, height);
}
public void toFront() {
// see 6240074 for more information
if (choiceListener != null)
choiceListener.unfurledChoiceOpening(helper);
Rectangle r = placeOnScreen();
reshape(r.x, r.y, r.width, r.height);
super.toFront();
setVisible(true);
}
/*
* Track a MouseEvent (either a drag or a press) and paint a new
* selected item, if necessary.
*/
// FIXME: first unfurl after move is not at edge of the screen onto second monitor doesn't
// track mouse correctly. Problem is w/ UnfurledChoice coords
public void trackMouse(MouseEvent e) {
// Event coords are relative to the button, so translate a bit
Point local = toLocalCoords(e);
// If x,y is over unfurled Choice,
// highlight item under cursor
switch (e.getID()) {
case MouseEvent.MOUSE_PRESSED:
// FIXME: If the Choice is unfurled and the mouse is pressed
// outside of the Choice, the mouse should ungrab on the
// the press, not the release
if (helper.isInVertSB(getBounds(), local.x, local.y)) {
mouseInSB = true;
helper.handleVSBEvent(e, getBounds(), local.x, local.y);
}
else {
trackSelection(local.x, local.y);
}
break;
case MouseEvent.MOUSE_RELEASED:
if (mouseInSB) {
mouseInSB = false;
helper.handleVSBEvent(e, getBounds(), local.x, local.y);
}else{
// See 6243382 for more information
helper.trackMouseReleasedScroll();
}
/*
else {
trackSelection(local.x, local.y);
}
*/
break;
case MouseEvent.MOUSE_DRAGGED:
if (mouseInSB) {
helper.handleVSBEvent(e, getBounds(), local.x, local.y);
}
else {
// See 6243382 for more information
helper.trackMouseDraggedScroll(local.x, local.y, width, height);
trackSelection(local.x, local.y);
}
break;
}
}
private void trackSelection(int transX, int transY) {
if (!helper.isEmpty()) {
if (transX > 0 && transX < width &&
transY > 0 && transY < height) {
int newIdx = helper.y2index(transY);
if (log.isLoggable(PlatformLogger.Level.FINE)) {
log.fine("transX=" + transX + ", transY=" + transY
+ ",width=" + width + ", height=" + height
+ ", newIdx=" + newIdx + " on " + target);
}
if ((newIdx >=0) && (newIdx < helper.getItemCount())
&& (newIdx != helper.getSelectedIndex()))
{
helper.select(newIdx);
unfurledChoice.repaint();
}
}
}
// FIXME: If dragged off top or bottom, scroll if there's a vsb
// (ICK - we'll need a timer or our own event or something)
}
/*
* fillRect with current Background color on the whole dropdown list.
*/
public void paintBackground() {
final Graphics g = getGraphics();
if (g != null) {
try {
g.setColor(getPeerBackground());
g.fillRect(0, 0, width, height);
} finally {
g.dispose();
}
}
}
/*
* 6405689. In some cases we should erase background to eliminate painting
* artefacts.
*/
@Override
public void repaint() {
if (!isVisible()) {
return;
}
if (helper.checkVsbVisibilityChangedAndReset()){
paintBackground();
}
super.repaint();
}
@Override
public void paintPeer(Graphics g) {
//System.out.println("UC.paint()");
Choice choice = (Choice)target;
Color colors[] = XChoicePeer.this.getGUIcolors();
draw3DRect(g, getSystemColors(), 0, 0, width - 1, height - 1, true);
draw3DRect(g, getSystemColors(), 1, 1, width - 3, height - 3, true);
helper.paintAllItems(g,
colors,
getBounds());
}
public void setVisible(boolean vis) {
xSetVisible(vis);
if (!vis && alignUnder != null) {
alignUnder.requestFocusInWindow();
}
}
/**
* Return a MouseEvent's Point in coordinates relative to the
* UnfurledChoice.
*/
private Point toLocalCoords(MouseEvent e) {
// Event coords are relative to the button, so translate a bit
Point global = e.getLocationOnScreen();
global.x -= x;
global.y -= y;
return global;
}
/* Returns true if the MouseEvent coords (which are based on the Choice)
* are inside of the UnfurledChoice.
*/
private boolean isMouseEventInside(MouseEvent e) {
Point local = toLocalCoords(e);
if (local.x > 0 && local.x < width &&
local.y > 0 && local.y < height) {
return true;
}
return false;
}
/**
* Tests if the mouse cursor is in the Unfurled Choice, yet not
* in the vertical scrollbar
*/
private boolean isMouseInListArea(MouseEvent e) {
if (isMouseEventInside(e)) {
Point local = toLocalCoords(e);
Rectangle bounds = getBounds();
if (!helper.isInVertSB(bounds, local.x, local.y)) {
return true;
}
}
return false;
}
/*
* Overridden from XWindow() because we don't want to send
* ComponentEvents
*/
public void handleConfigureNotifyEvent(XEvent xev) {}
public void handleMapNotifyEvent(XEvent xev) {}
public void handleUnmapNotifyEvent(XEvent xev) {}
} //UnfurledChoice
public void dispose() {
if (unfurledChoice != null) {
unfurledChoice.destroy();
}
super.dispose();
}
/*
* fix for 6239938 : Choice drop-down does not disappear when it loses
* focus, on XToolkit
* We are able to handle all _Key_ events received by Choice when
* it is in opened state without sending it to EventQueue.
* If Choice is in closed state we should behave like before: send
* all events to EventQueue.
* To be compatible with Motif we should handle all KeyEvents in
* Choice if it is opened. KeyEvents should be sent into Java if Choice is not opened.
*/
boolean prePostEvent(final AWTEvent e) {
if (unfurled){
// fix for 6253211: PIT: MouseWheel events not triggered for Choice drop down in XAWT
if (e instanceof MouseWheelEvent){
return super.prePostEvent(e);
}
//fix 6252982: PIT: Keyboard FocusTraversal not working when choice's drop-down is visible, on XToolkit
if (e instanceof KeyEvent){
// notify XWindow that this event had been already handled and no need to post it again
InvocationEvent ev = new InvocationEvent(target, new Runnable() {
public void run() {
if(target.isFocusable() &&
getParentTopLevel().isFocusableWindow() )
{
handleJavaKeyEvent((KeyEvent)e);
}
}
});
postEvent(ev);
return true;
} else {
if (e instanceof MouseEvent){
// Fix for 6240046 : REG:Choice's Drop-down does not disappear when clicking somewhere, after popup menu is disposed
// if user presses Right Mouse Button on opened (unfurled)
// Choice then we mustn't open a popup menu. We could filter
// Mouse Events and handle them in XChoicePeer if Choice
// currently in opened state.
MouseEvent me = (MouseEvent)e;
int eventId = e.getID();
// fix 6251983: PIT: MouseDragged events not triggered
// fix 6251988: PIT: Choice consumes MouseReleased, MouseClicked events when clicking it with left button,
if ((unfurledChoice.isMouseEventInside(me) ||
(!firstPress && eventId == MouseEvent.MOUSE_DRAGGED)))
{
return handleMouseEventByChoice(me);
}
// MouseMoved events should be fired in Choice's comp if it's not opened
// Shouldn't generate Moved Events. CR : 6251995
if (eventId == MouseEvent.MOUSE_MOVED){
return handleMouseEventByChoice(me);
}
//fix for 6272965: PIT: Choice triggers MousePressed when pressing mouse outside comp while drop-down is active, XTkt
if ( !firstPress && !( isMouseEventInChoice(me) ||
unfurledChoice.isMouseEventInside(me)) &&
( eventId == MouseEvent.MOUSE_PRESSED ||
eventId == MouseEvent.MOUSE_RELEASED ||
eventId == MouseEvent.MOUSE_CLICKED )
)
{
return handleMouseEventByChoice(me);
}
}
}//else KeyEvent
}//if unfurled
return super.prePostEvent(e);
}
//convenient method
//do not generate this kind of Events
public boolean handleMouseEventByChoice(final MouseEvent me){
InvocationEvent ev = new InvocationEvent(target, new Runnable() {
public void run() {
handleJavaMouseEvent(me);
}
});
postEvent(ev);
return true;
}
/* Returns true if the MouseEvent coords
* are inside of the Choice itself (it doesnt's depends on
* if this choice opened or not).
*/
private boolean isMouseEventInChoice(MouseEvent e) {
int x = e.getX();
int y = e.getY();
Rectangle choiceRect = getBounds();
if (x < 0 || x > choiceRect.width ||
y < 0 || y > choiceRect.height)
{
return false;
}
return true;
}
}
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