void createPopup(String[] items, int selectionIndex) {
// create shell and list
popup = new AlphaDialog(getShell(), SWT.NO_TRIM | SWT.ON_TOP | SWT.BORDER);
popup.setBackgroundMode(SWT.INHERIT_DEFAULT);
Color borderColor = ColorCache.getInstance().getColor(200, 200, 200);
popup.setBackground(borderColor);
GridLayout gridLayout = new GridLayout(2, false);
gridLayout.marginHeight = 0;
gridLayout.marginBottom = 1;
gridLayout.marginTop = 0;
gridLayout.marginLeft = 0;
gridLayout.marginRight = 0;
gridLayout.horizontalSpacing = 0;
gridLayout.verticalSpacing = 0;
gridLayout.marginWidth = 0;
popup.getPopup().setLayout(gridLayout);
int style = getStyle();
int listStyle = SWT.SINGLE | SWT.V_SCROLL | SWT.H_SCROLL | SWT.BORDER;
if ((style & SWT.FLAT) != 0) listStyle |= SWT.FLAT;
if ((style & SWT.RIGHT_TO_LEFT) != 0) listStyle |= SWT.RIGHT_TO_LEFT;
if ((style & SWT.LEFT_TO_RIGHT) != 0) listStyle |= SWT.LEFT_TO_RIGHT;
list = new List(popup.getPopup(), listStyle);
GridData gridData = new GridData(GridData.FILL_BOTH);
gridData.horizontalSpan = 2;
list.setLayoutData(gridData);
list.addMouseListener(
new MouseAdapter() {
public void mouseDown(MouseEvent e) {
if (e.button == 3) {
text.getMenu().setVisible(true);
}
if (list.isFocusControl()) return;
text.forceFocus();
list.setFocus();
}
});
if (font != null) list.setFont(font);
if (foreground != null) list.setForeground(foreground);
if (background != null) list.setBackground(background);
int[] popupEvents = {SWT.Close, SWT.Paint, SWT.Deactivate};
for (int i = 0; i < popupEvents.length; i++)
popup.getPopup().addListener(popupEvents[i], listener);
int[] listEvents = {
SWT.MouseUp, SWT.Selection, SWT.Traverse, SWT.KeyDown, SWT.KeyUp, SWT.FocusIn, SWT.Dispose
};
for (int i = 0; i < listEvents.length; i++) list.addListener(listEvents[i], listener);
if (items != null) list.setItems(items);
if (selectionIndex != -1) list.setSelection(selectionIndex);
}
public void redraw() {
super.redraw();
text.redraw();
arrow.redraw();
if (icon != null) icon.redraw();
if (popup.isVisible()) list.redraw();
}
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
if (popup != null) popup.setVisible(false);
if (text != null) text.setEnabled(enabled);
if (icon != null) icon.setEnabled(enabled);
if (arrow != null) arrow.setEnabled(enabled);
}
public boolean isFocusControl() {
checkWidget();
if (text.isFocusControl()
|| arrow.isFocusControl()
|| list.isFocusControl()
|| icon.isFocusControl()
|| popup.isFocusControl()) {
return true;
}
return super.isFocusControl();
}
private void dropDown(boolean drop) {
if (drop == isDropped()) return;
if (!drop) {
popup.setVisible(false);
if (!isDisposed() && arrow.isFocusControl()) {
text.setFocus();
}
return;
}
if (getShell() != popup.getParent()) {
String[] items = list.getItems();
int selectionIndex = list.getSelectionIndex();
list.removeListener(SWT.Dispose, listener);
popup.dispose();
popup = null;
list = null;
createPopup(items, selectionIndex);
}
computeShowArea();
popup.setAlpha(popup.getFinalAlpha());
popup.setVisible(true);
}
void comboEvent(Event event) {
switch (event.type) {
case SWT.Dispose:
if (popup != null && !popup.isDisposed()) {
list.removeListener(SWT.Dispose, listener);
popup.dispose();
}
Shell shell = getShell();
shell.removeListener(SWT.Deactivate, listener);
Display display = getDisplay();
display.removeFilter(SWT.FocusIn, filter);
popup = null;
text = null;
list = null;
arrow = null;
break;
case SWT.Move:
dropDown(false);
break;
case SWT.Resize:
internalLayout(false);
break;
}
}
private void computeShowArea() {
// Point size = getSize ();
int itemCount = list.getItemCount();
itemCount = (itemCount == 0) ? visibleItemCount : Math.min(visibleItemCount, itemCount);
int itemHeight = list.getItemHeight() * itemCount;
Point listSize = list.computeSize(SWT.DEFAULT, itemHeight, false);
// list.setBounds(1, 1, Math.min (size.x - 2, listSize.x), listSize.y);
int index = list.getSelectionIndex();
if (index != -1) list.setTopIndex(index);
Display display = getDisplay();
Rectangle listRect = list.getBounds();
Rectangle parentRect = display.map(getParent(), null, getBounds());
Point comboSize = getSize();
Rectangle displayRect = getMonitor().getClientArea();
int width = Math.max(comboSize.x, listRect.width + 2);
int height = listRect.height + 2;
int x = parentRect.x;
int y = parentRect.y + comboSize.y;
if (y + height > displayRect.y + displayRect.height) y = parentRect.y - height;
popup.setBounds(x, y, width - 15, listSize.y + 15);
}
void listEvent(Event event) {
switch (event.type) {
case SWT.Dispose:
if (getShell() != popup.getParent()) {
String[] items = list.getItems();
int selectionIndex = list.getSelectionIndex();
popup = null;
list = null;
createPopup(items, selectionIndex);
}
break;
case SWT.FocusIn:
{
handleFocus(SWT.FocusIn);
break;
}
case SWT.MouseUp:
{
if (event.button != 1) return;
dropDown(false);
break;
}
case SWT.Selection:
{
int index = list.getSelectionIndex();
if (index == -1) return;
text.setText(list.getItem(index));
// text.selectAll ();
list.setSelection(index);
// list.forceFocus();
Event e = new Event();
e.time = event.time;
e.stateMask = event.stateMask;
e.doit = event.doit;
notifyListeners(SWT.Selection, e);
event.doit = e.doit;
break;
}
case SWT.Traverse:
{
switch (event.detail) {
case SWT.TRAVERSE_RETURN:
case SWT.TRAVERSE_ESCAPE:
case SWT.TRAVERSE_ARROW_PREVIOUS:
case SWT.TRAVERSE_ARROW_NEXT:
event.doit = false;
break;
}
Event e = new Event();
e.time = event.time;
e.detail = event.detail;
e.doit = event.doit;
e.character = event.character;
e.keyCode = event.keyCode;
notifyListeners(SWT.Traverse, e);
event.doit = e.doit;
event.detail = e.detail;
break;
}
case SWT.KeyUp:
{
Event e = new Event();
e.time = event.time;
e.character = event.character;
e.keyCode = event.keyCode;
e.stateMask = event.stateMask;
notifyListeners(SWT.KeyUp, e);
break;
}
case SWT.KeyDown:
{
if (event.character == SWT.ESC) {
// Escape key cancels popup list
dropDown(false);
}
if ((event.stateMask & SWT.ALT) != 0
&& (event.keyCode == SWT.ARROW_UP || event.keyCode == SWT.ARROW_DOWN)) {
dropDown(false);
}
if (event.character == SWT.CR) {
// Enter causes default selection
dropDown(false);
Event e = new Event();
e.time = event.time;
e.stateMask = event.stateMask;
notifyListeners(SWT.DefaultSelection, e);
}
// At this point the widget may have been disposed.
// If so, do not continue.
if (isDisposed()) break;
Event e = new Event();
e.time = event.time;
e.character = event.character;
e.keyCode = event.keyCode;
e.stateMask = event.stateMask;
notifyListeners(SWT.KeyDown, e);
break;
}
}
}
boolean isDropped() {
if (popup == null) return false;
return popup.getVisible();
}
private void showFadeIn() {
computeShowArea();
popup.showFadeIn();
}
void textEvent(Event event) {
switch (event.type) {
case SWT.FocusIn:
{
handleFocus(SWT.FocusIn);
break;
}
case SWT.KeyDown:
{
if (event.character == SWT.CR) {
dropDown(false);
Event e = new Event();
e.time = event.time;
e.stateMask = event.stateMask;
notifyListeners(SWT.DefaultSelection, e);
}
// At this point the widget may have been disposed.
// If so, do not continue.
if (isDisposed()) break;
if (event.keyCode == SWT.ARROW_UP || event.keyCode == SWT.ARROW_DOWN) {
event.doit = false;
if ((event.stateMask & SWT.ALT) != 0) {
boolean dropped = isDropped();
text.selectAll();
if (!dropped) setFocus();
dropDown(!dropped);
break;
}
int oldIndex = getSelectionIndex();
if (event.keyCode == SWT.ARROW_UP && popup.isVisible()) {
select(Math.max(oldIndex - 1, 0));
} else if (popup.isVisible()) {
select(Math.min(oldIndex + 1, getItemCount() - 1));
}
if (oldIndex != getSelectionIndex()) {
Event e = new Event();
e.time = event.time;
e.stateMask = event.stateMask;
notifyListeners(SWT.Selection, e);
}
// At this point the widget may have been disposed.
// If so, do not continue.
if (isDisposed()) break;
}
// Further work : Need to add support for incremental search in
// pop up list as characters typed in text widget
Event e = new Event();
e.time = event.time;
e.character = event.character;
e.keyCode = event.keyCode;
e.stateMask = event.stateMask;
notifyListeners(SWT.KeyDown, e);
break;
}
case SWT.KeyUp:
{
Event e = new Event();
e.time = event.time;
e.character = event.character;
e.keyCode = event.keyCode;
e.stateMask = event.stateMask;
notifyListeners(SWT.KeyUp, e);
break;
}
case SWT.Modify:
{
list.deselectAll();
Event e = new Event();
e.time = event.time;
notifyListeners(SWT.Modify, e);
break;
}
case SWT.MouseDown:
{
if (event.button != 1) return;
if (text.getEditable()) return;
boolean dropped = isDropped();
text.selectAll();
if (!dropped) setFocus();
dropDown(!dropped);
break;
}
case SWT.MouseUp:
{
if (event.button != 1) return;
if (text.getEditable()) return;
text.selectAll();
break;
}
case SWT.Traverse:
{
switch (event.detail) {
case SWT.TRAVERSE_RETURN:
case SWT.TRAVERSE_ARROW_PREVIOUS:
case SWT.TRAVERSE_ARROW_NEXT:
// The enter causes default selection and
// the arrow keys are used to manipulate the list contents so
// do not use them for traversal.
event.doit = false;
break;
}
Event e = new Event();
e.time = event.time;
e.detail = event.detail;
e.doit = event.doit;
e.character = event.character;
e.keyCode = event.keyCode;
notifyListeners(SWT.Traverse, e);
event.doit = e.doit;
event.detail = e.detail;
break;
}
}
}
public void setVisible(boolean visible) {
super.setVisible(visible);
if (!visible) popup.setVisible(false);
}
