/**
* Copyright (c) 2005-2011 by Appcelerator, Inc. All Rights Reserved.
* Licensed under the terms of the Eclipse Public License (EPL).
* Please see the license.txt included with this distribution for details.
* Any modifications to this file must keep this entire header intact.
*/
package org.python.pydev.utils.tablecombo;
import java.lang.reflect.InvocationTargetException;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.accessibility.ACC;
import org.eclipse.swt.accessibility.AccessibleAdapter;
import org.eclipse.swt.accessibility.AccessibleControlAdapter;
import org.eclipse.swt.accessibility.AccessibleControlEvent;
import org.eclipse.swt.accessibility.AccessibleEvent;
import org.eclipse.swt.accessibility.AccessibleTextAdapter;
import org.eclipse.swt.accessibility.AccessibleTextEvent;
import org.eclipse.swt.events.KeyListener;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.events.VerifyListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Layout;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.TypedListener;
import org.eclipse.swt.widgets.Widget;
/**
* From http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt.nebula/org.eclipse.nebula.widgets.tablecombo/src/org/eclipse/nebula/?root=Technology_Project
*
* The TableCombo class represents a selectable user interface object
* that combines a label, textfield, and a table and issues notification
* when an item is selected from the table.
*
* Note: This widget is basically a extension of the CCombo widget. The list
* control was replaced by a Table control and a Label control was added so that
* images can be displayed when a value from the drop down items has a image
* associated to it.
*
* <p>
* TableCombo was written to allow the user to be able to display multiple
* columns of data in the "Drop Down" portion of the combo.
* </p>
* <p>
* Special Note: Although this class is a subclass of <code>Composite</code>,
* it does not make sense to add children to it, or set a layout on it.
* </p>
* <dl>
* <dt><b>Styles:</b>
* <dd>BORDER, READ_ONLY, FLAT</dd>
* <dt><b>Events:</b>
* <dd>DefaultSelection, Modify, Selection, Verify</dd>
* </dl>
*
*/
public class TableCombo extends Composite {
private Shell popup;
private Button arrow;
private Label selectedImage;
private Text text;
private Table table;
private Font font;
private boolean hasFocus;
private int visibleItemCount = 7;
private Listener listener;
private Listener focusFilter;
private int displayColumnIndex = 0;
private Color foreground;
private Color background;
private int[] columnWidths;
private int tableWidthPercentage = 100;
private boolean showImageWithinSelection = true;
private boolean showColorWithinSelection = true;
private boolean showFontWithinSelection = true;
/**
* Constructs a new instance of this class given its parent
* and a style value describing its behavior and appearance.
* <p>
* The style value is either one of the style constants defined in
* class <code>SWT</code> which is applicable to instances of this
* class, or must be built by <em>bitwise OR</em>'ing together
* (that is, using the <code>int</code> "|" operator) two or more
* of those <code>SWT</code> style constants. The class description
* lists the style constants that are applicable to the class.
* Style bits are also inherited from superclasses.
* </p>
*
* @param parent a widget which will be the parent of the new instance (cannot be null)
* @param style the style of widget to construct
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the parent</li>
* </ul>
*
* @see SWT#BORDER
* @see SWT#READ_ONLY
* @see SWT#FLAT
* @see Widget#getStyle()
*/
public TableCombo(Composite parent, int style) {
super(parent, style = checkStyle(style));
// set the label style
int textStyle = SWT.SINGLE;
if ((style & SWT.READ_ONLY) != 0)
textStyle |= SWT.READ_ONLY;
if ((style & SWT.FLAT) != 0)
textStyle |= SWT.FLAT;
// create label to hold image if necessary.
selectedImage = new Label(this, SWT.NONE);
selectedImage.setAlignment(SWT.RIGHT);
selectedImage.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
getLayout();
// create the control to hold the display text of what the user selected.
text = new Text(this, textStyle);
text.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE));
// set the arrow style.
int arrowStyle = SWT.ARROW | SWT.DOWN;
if ((style & SWT.FLAT) != 0)
arrowStyle |= SWT.FLAT;
// create the down arrow button
arrow = new Button(this, arrowStyle);
// now add a listener to listen to the events we are interested in.
listener = new Listener() {
public void handleEvent(Event event) {
if (isDisposed())
return;
// check for a popup event
if (popup == event.widget) {
popupEvent(event);
return;
}
if (text == event.widget) {
textEvent(event);
return;
}
// check for a table event
if (table == event.widget) {
tableEvent(event);
return;
}
// check for arrow event
if (arrow == event.widget) {
arrowEvent(event);
return;
}
// check for this widget's event
if (TableCombo.this == event.widget) {
comboEvent(event);
return;
}
// check for shell event
if (getShell() == event.widget) {
getDisplay().asyncExec(new Runnable() {
public void run() {
if (isDisposed())
return;
handleFocus(SWT.FocusOut);
}
});
}
}
};
// create new focus listener
focusFilter = new Listener() {
public void handleEvent(Event event) {
if (isDisposed())
return;
Shell shell = ((Control) event.widget).getShell();
if (shell == TableCombo.this.getShell()) {
handleFocus(SWT.FocusOut);
}
}
};
// set the listeners for this control
int[] comboEvents = { SWT.Dispose, SWT.FocusIn, SWT.Move, SWT.Resize };
for (int i = 0; i < comboEvents.length; i++)
this.addListener(comboEvents[i], listener);
int[] textEvents = { SWT.DefaultSelection, SWT.KeyDown, SWT.KeyUp, SWT.MenuDetect, SWT.Modify, SWT.MouseDown,
SWT.MouseUp, SWT.MouseDoubleClick, SWT.MouseWheel, SWT.Traverse, SWT.FocusIn, SWT.Verify };
for (int i = 0; i < textEvents.length; i++)
text.addListener(textEvents[i], listener);
// set the listeners for the arrow image
int[] arrowEvents = { SWT.Selection, SWT.FocusIn };
for (int i = 0; i < arrowEvents.length; i++)
arrow.addListener(arrowEvents[i], listener);
// initialize the drop down
createPopup(-1);
initAccessible();
}
/**
* @param style
* @return
*/
private static int checkStyle(int style) {
int mask = SWT.BORDER | SWT.READ_ONLY | SWT.FLAT | SWT.LEFT_TO_RIGHT | SWT.RIGHT_TO_LEFT;
return SWT.NO_FOCUS | (style & mask);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the receiver's text is modified, by sending
* it one of the messages defined in the <code>ModifyListener</code>
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see ModifyListener
* @see #removeModifyListener
*/
public void addModifyListener(ModifyListener listener) {
checkWidget();
if (listener == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener(listener);
addListener(SWT.Modify, typedListener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the user changes the receiver's selection, by sending
* it one of the messages defined in the <code>SelectionListener</code>
* interface.
* <p>
* <code>widgetSelected</code> is called when the combo's list selection changes.
* <code>widgetDefaultSelected</code> is typically called when ENTER is pressed the combo's text area.
* </p>
*
* @param listener the listener which should be notified when the user changes the receiver's selection
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #removeSelectionListener
* @see SelectionEvent
*/
public void addSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
TypedListener typedListener = new TypedListener(listener);
addListener(SWT.Selection, typedListener);
addListener(SWT.DefaultSelection, typedListener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the user presses keys in the text field.
* interface.
*
* @param listener the listener which should be notified when the user presses keys in the text control.
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void addTextControlKeyListener(KeyListener listener) {
checkWidget();
if (listener == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
text.addKeyListener(listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the user presses keys in the text control.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
*/
public void removeTextControlKeyListener(KeyListener listener) {
checkWidget();
if (listener == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
text.removeKeyListener(listener);
}
/**
* Adds the listener to the collection of listeners who will
* be notified when the receiver's text is verified, by sending
* it one of the messages defined in the <code>VerifyListener</code>
* interface.
*
* @param listener the listener which should be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see VerifyListener
* @see #removeVerifyListener
*
* @since 3.3
*/
public void addVerifyListener(VerifyListener listener) {
checkWidget();
if (listener == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
TypedListener typedListener = new TypedListener(listener);
addListener(SWT.Verify, typedListener);
}
/**
* Handle Arrow Event
* @param event
*/
private void arrowEvent(Event event) {
switch (event.type) {
case SWT.FocusIn: {
handleFocus(SWT.FocusIn);
break;
}
case SWT.MouseDown: {
Event mouseEvent = new Event();
mouseEvent.button = event.button;
mouseEvent.count = event.count;
mouseEvent.stateMask = event.stateMask;
mouseEvent.time = event.time;
mouseEvent.x = event.x;
mouseEvent.y = event.y;
notifyListeners(SWT.MouseDown, mouseEvent);
event.doit = mouseEvent.doit;
break;
}
case SWT.MouseUp: {
Event mouseEvent = new Event();
mouseEvent.button = event.button;
mouseEvent.count = event.count;
mouseEvent.stateMask = event.stateMask;
mouseEvent.time = event.time;
mouseEvent.x = event.x;
mouseEvent.y = event.y;
notifyListeners(SWT.MouseUp, mouseEvent);
event.doit = mouseEvent.doit;
break;
}
case SWT.Selection: {
text.setFocus();
dropDown(!isDropped());
break;
}
}
}
/**
* Sets the selection in the receiver's text field to an empty
* selection starting just before the first character. If the
* text field is editable, this has the effect of placing the
* i-beam at the start of the text.
* <p>
* Note: To clear the selected items in the receiver's list,
* use <code>deselectAll()</code>.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see #deselectAll
*/
public void clearSelection() {
checkWidget();
text.clearSelection();
table.deselectAll();
}
/**
* Handle Combo events
* @param event
*/
private void comboEvent(Event event) {
switch (event.type) {
case SWT.Dispose:
removeListener(SWT.Dispose, listener);
notifyListeners(SWT.Dispose, event);
event.type = SWT.None;
if (popup != null && !popup.isDisposed()) {
table.removeListener(SWT.Dispose, listener);
popup.dispose();
}
Shell shell = getShell();
shell.removeListener(SWT.Deactivate, listener);
Display display = getDisplay();
display.removeFilter(SWT.FocusIn, focusFilter);
popup = null;
text = null;
table = null;
arrow = null;
selectedImage = null;
break;
case SWT.FocusIn:
Control focusControl = getDisplay().getFocusControl();
if (focusControl == arrow || focusControl == table)
return;
if (isDropped()) {
table.setFocus();
} else {
text.setFocus();
}
break;
case SWT.Move:
dropDown(false);
break;
case SWT.Resize:
internalLayout(false);
break;
}
}
/**
* {@inheritDoc}
*/
public Point computeSize(int wHint, int hHint, boolean changed) {
checkWidget();
int overallWidth = 0;
int height = 0;
TableItem[] tableItems = table.getItems();
GC gc = new GC(text);
int spacer = gc.stringExtent(" ").x; //$NON-NLS-1$
int textWidth = gc.stringExtent(text.getText()).x;
int colIndex = getDisplayColumnIndex();
// calculate the maximum text width.
for (int i = 0; i < tableItems.length; i++) {
textWidth = Math.max(gc.stringExtent(tableItems[i].getText(colIndex)).x, textWidth);
}
gc.dispose();
Point textSize = text.computeSize(SWT.DEFAULT, SWT.DEFAULT, changed);
Point arrowSize = arrow.computeSize(SWT.DEFAULT, SWT.DEFAULT, changed);
Point tableSize = table.computeSize(SWT.DEFAULT, SWT.DEFAULT, changed);
int borderWidth = getBorderWidth();
height = Math.max(textSize.y, arrowSize.y);
overallWidth = Math.max(textWidth + 2 * spacer + arrowSize.x + 2 * borderWidth, tableSize.x);
if (wHint != SWT.DEFAULT)
overallWidth = wHint;
if (hHint != SWT.DEFAULT)
height = hHint;
return new Point(overallWidth + 2 * borderWidth, height + 2 * borderWidth);
}
/**
* Copies the selected text.
* <p>
* The current selection is copied to the clipboard.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.3
*/
public void copy() {
checkWidget();
text.copy();
}
/**
* creates the popup shell.
* @param selectionIndex
*/
void createPopup(int selectionIndex) {
// create shell and table
popup = new Shell(getShell(), SWT.NO_TRIM | SWT.ON_TOP);
// set style
int style = getStyle();
int tableStyle = SWT.SINGLE | SWT.V_SCROLL;
if ((style & SWT.FLAT) != 0)
tableStyle |= SWT.FLAT;
if ((style & SWT.RIGHT_TO_LEFT) != 0)
tableStyle |= SWT.RIGHT_TO_LEFT;
if ((style & SWT.LEFT_TO_RIGHT) != 0)
tableStyle |= SWT.LEFT_TO_RIGHT;
// create table
table = new Table(popup, SWT.SINGLE | SWT.FULL_SELECTION);
if (font != null)
table.setFont(font);
if (foreground != null)
table.setForeground(foreground);
if (background != null)
table.setBackground(background);
// Add popup listeners
int[] popupEvents = { SWT.Close, SWT.Paint, SWT.Deactivate };
for (int i = 0; i < popupEvents.length; i++) {
popup.addListener(popupEvents[i], listener);
}
// add table listeners
int[] tableEvents = { SWT.MouseUp, SWT.Selection, SWT.Traverse, SWT.KeyDown, SWT.KeyUp, SWT.FocusIn,
SWT.Dispose };
for (int i = 0; i < tableEvents.length; i++) {
table.addListener(tableEvents[i], listener);
}
// set the selection
if (selectionIndex != -1) {
table.setSelection(selectionIndex);
}
}
/**
* Cuts the selected text.
* <p>
* The current selection is first copied to the
* clipboard and then deleted from the widget.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.3
*/
public void cut() {
checkWidget();
text.cut();
}
/**
* handle DropDown request
* @param drop
*/
void dropDown(boolean drop) {
// if already dropped then return
if (drop == isDropped())
return;
// closing the dropDown
if (!drop) {
popup.setVisible(false);
if (!isDisposed() && isFocusControl()) {
text.setFocus();
}
return;
}
// if not visible then return
if (!isVisible())
return;
// create a new popup if needed.
if (getShell() != popup.getParent()) {
int selectionIndex = table.getSelectionIndex();
table.removeListener(SWT.Dispose, listener);
popup.dispose();
popup = null;
table = null;
createPopup(selectionIndex);
}
// get the size of the TableCombo.
Point tableComboSize = getSize();
// calculate the table height.
int itemCount = table.getItemCount();
itemCount = (itemCount == 0) ? visibleItemCount : Math.min(visibleItemCount, itemCount) - 1;
int itemHeight = (table.getItemHeight() * itemCount);
// add 1 to the table height if the table item count is less than the visible item count.
if (table.getItemCount() <= visibleItemCount) {
itemHeight += 1;
}
// add height of header if the header is being displayed.
if (table.getHeaderVisible()) {
itemHeight += table.getHeaderHeight();
}
// get table column references
TableColumn[] tableColumns = table.getColumns();
int totalColumns = (tableColumns == null ? 0 : tableColumns.length);
// check to make sure at least one column has been specified. if it hasn't
// then just create a blank one.
if (table.getColumnCount() == 0) {
new TableColumn(table, SWT.NONE);
totalColumns = 1;
tableColumns = table.getColumns();
}
int totalColumnWidth = 0;
// now pack any columns that do not have a explicit value set for them.
for (int colIndex = 0; colIndex < totalColumns; colIndex++) {
if (!wasColumnWidthSpecified(colIndex)) {
tableColumns[colIndex].pack();
}
totalColumnWidth += tableColumns[colIndex].getWidth();
}
// calculate the table size after making adjustments.
Point tableSize = table.computeSize(SWT.DEFAULT, itemHeight, false);
// calculate the table width and table height.
double pct = tableWidthPercentage / 100d;
int tableWidth = (int) (Math.max(tableComboSize.x - 2, tableSize.x) * pct);
int tableHeight = tableSize.y;
// add the width of a horizontal scrollbar to the table height if we are
// not viewing the full table.
if (tableWidthPercentage < 100) {
tableHeight += table.getHorizontalBar().getSize().y;
}
// set the bounds on the table.
table.setBounds(1, 1, tableWidth, tableHeight);
// adjust any of the columns to make sure that there is no empty space after
// the last column.
autoAdjustColumnWidthsIfNeeded(tableColumns, tableWidth, totalColumnWidth);
// set the table top index if there is a valid selection.
int index = table.getSelectionIndex();
if (index != -1) {
table.setTopIndex(index);
}
// calculate popup dimensions.
Display display = getDisplay();
Rectangle tableRect = table.getBounds();
Rectangle parentRect = display.map(getParent(), null, getBounds());
Point comboSize = getSize();
Rectangle displayRect = getMonitor().getClientArea();
int overallWidth = 0;
// now set what the overall width should be.
if (tableWidthPercentage < 100) {
overallWidth = tableRect.width + 2;
} else {
overallWidth = Math.max(comboSize.x, tableRect.width + 2);
}
int overallHeight = tableRect.height + 2;
int x = parentRect.x;
int y = parentRect.y + comboSize.y;
if (y + overallHeight > displayRect.y + displayRect.height)
y = parentRect.y - overallHeight;
if (x + overallWidth > displayRect.x + displayRect.width)
x = displayRect.x + displayRect.width - tableRect.width;
// set the bounds of the popup
popup.setBounds(x, y, overallWidth, overallHeight);
// set the popup visible
popup.setVisible(true);
// set focus on the table.
table.setFocus();
}
/*
* Return the Label immediately preceding the receiver in the z-order,
* or null if none.
*/
private Label getAssociatedLabel() {
Control[] siblings = getParent().getChildren();
for (int i = 0; i < siblings.length; i++) {
if (siblings[i] == TableCombo.this) {
if (i > 0 && siblings[i - 1] instanceof Label) {
return (Label) siblings[i - 1];
}
}
}
return null;
}
/**
* {@inheritDoc}
*/
public Control[] getChildren() {
checkWidget();
return new Control[0];
}
/**
* Gets the editable state.
*
* @return whether or not the receiver is editable
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.0
*/
public boolean getEditable() {
checkWidget();
return text.getEditable();
}
/**
* Returns the item at the given, zero-relative index in the
* receiver's list. Throws an exception if the index is out
* of range.
*
* @param index the index of the item to return
* @return the item at the given index
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_INVALID_RANGE - if the index is not between 0 and the number of elements in the list minus 1 (inclusive)</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public String getItem(int index) {
checkWidget();
return table.getItem(index).getText(getDisplayColumnIndex());
}
/**
* Returns the number of items contained in the receiver's list.
*
* @return the number of items
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getItemCount() {
checkWidget();
return table.getItemCount();
}
/**
* Returns the height of the area which would be used to
* display <em>one</em> of the items in the receiver's list.
*
* @return the height of one item
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getItemHeight() {
checkWidget();
return table.getItemHeight();
}
/**
* Returns an array of <code>String</code>s which are the items
* in the receiver's list.
* <p>
* Note: This is not the actual structure used by the receiver
* to maintain its list of items, so modifying the array will
* not affect the receiver.
* </p>
*
* @return the items in the receiver's list
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public String[] getItems() {
checkWidget();
// get a list of the table items.
TableItem[] tableItems = table.getItems();
int totalItems = (tableItems == null ? 0 : tableItems.length);
// create string array to hold the total number of items.
String[] stringItems = new String[totalItems];
int colIndex = getDisplayColumnIndex();
// now copy the display string from the tableitems.
for (int index = 0; index < totalItems; index++) {
stringItems[index] = tableItems[index].getText(colIndex);
}
return stringItems;
}
/**
* Returns a <code>Point</code> whose x coordinate is the start
* of the selection in the receiver's text field, and whose y
* coordinate is the end of the selection. The returned values
* are zero-relative. An "empty" selection as indicated by
* the the x and y coordinates having the same value.
*
* @return a point representing the selection start and end
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public Point getSelection() {
checkWidget();
return text.getSelection();
}
/**
* Returns the zero-relative index of the item which is currently
* selected in the receiver's list, or -1 if no item is selected.
*
* @return the index of the selected item
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getSelectionIndex() {
checkWidget();
return table.getSelectionIndex();
}
/**
* {@inheritDoc}
*/
public int getStyle() {
checkWidget();
int style = super.getStyle();
style &= ~SWT.READ_ONLY;
if (!text.getEditable())
style |= SWT.READ_ONLY;
return style;
}
/**
* Returns a string containing a copy of the contents of the
* receiver's text field.
*
* @return the receiver's text
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public String getText() {
checkWidget();
return text.getText();
}
/**
* Returns the height of the receivers's text field.
*
* @return the text height
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int getTextHeight() {
checkWidget();
return text.getLineHeight();
}
/**
* Gets the number of items that are visible in the drop
* down portion of the receiver's list.
*
* @return the number of items that are visible
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.0
*/
public int getVisibleItemCount() {
checkWidget();
return visibleItemCount;
}
/**
* Handle Focus event
* @param type
*/
private void handleFocus(int type) {
switch (type) {
case SWT.FocusIn: {
if (hasFocus)
return;
if (getEditable()) {
text.selectAll();
}
hasFocus = true;
Shell shell = getShell();
shell.removeListener(SWT.Deactivate, listener);
shell.addListener(SWT.Deactivate, listener);
Display display = getDisplay();
display.removeFilter(SWT.FocusIn, focusFilter);
display.addFilter(SWT.FocusIn, focusFilter);
Event e = new Event();
notifyListeners(SWT.FocusIn, e);
break;
}
case SWT.FocusOut: {
if (!hasFocus)
return;
Control focusControl = getDisplay().getFocusControl();
if (focusControl == arrow || focusControl == table || focusControl == text)
return;
hasFocus = false;
Shell shell = getShell();
shell.removeListener(SWT.Deactivate, listener);
Display display = getDisplay();
display.removeFilter(SWT.FocusIn, focusFilter);
Event e = new Event();
notifyListeners(SWT.FocusOut, e);
break;
}
}
}
/**
* Searches the receiver's list starting at the first item
* (index 0) until an item is found that is equal to the
* argument, and returns the index of that item. If no item
* is found, returns -1.
*
* @param string the search item
* @return the index of the item
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int indexOf(String string) {
checkWidget();
if (string == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
// get a list of the table items.
TableItem[] tableItems = table.getItems();
int totalItems = (tableItems == null ? 0 : tableItems.length);
int colIndex = getDisplayColumnIndex();
// now copy the display string from the tableitems.
for (int index = 0; index < totalItems; index++) {
if (string.equals(tableItems[index].getText(colIndex))) {
return index;
}
}
return -1;
}
/**
* Searches the receiver's list starting at the given,
* zero-relative index until an item is found that is equal
* to the argument, and returns the index of that item. If
* no item is found or the starting index is out of range,
* returns -1.
*
* @param string the search item
* @param start the zero-relative index at which to begin the search
* @return the index of the item
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public int indexOf(String string, int start) {
checkWidget();
if (string == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
// get a list of the table items.
TableItem[] tableItems = table.getItems();
int totalItems = (tableItems == null ? 0 : tableItems.length);
if (start < totalItems) {
int colIndex = getDisplayColumnIndex();
// now copy the display string from the tableitems.
for (int index = start; index < totalItems; index++) {
if (string.equals(tableItems[index].getText(colIndex))) {
return index;
}
}
}
return -1;
}
/**
* sets whether or not to show table lines
* @param showTableLines
*/
public void setShowTableLines(boolean showTableLines) {
checkWidget();
table.setLinesVisible(showTableLines);
}
/**
* sets whether or not to show table header.
* @param showTableHeader
*/
public void setShowTableHeader(boolean showTableHeader) {
checkWidget();
table.setHeaderVisible(showTableHeader);
}
/**
* Add Accessbile listeners to label and table.
*/
void initAccessible() {
AccessibleAdapter accessibleAdapter = new AccessibleAdapter() {
public void getName(AccessibleEvent e) {
String name = null;
Label label = getAssociatedLabel();
if (label != null) {
name = stripMnemonic(text.getText());
}
e.result = name;
}
public void getKeyboardShortcut(AccessibleEvent e) {
String shortcut = null;
Label label = getAssociatedLabel();
if (label != null) {
String text = label.getText();
if (text != null) {
char mnemonic = _findMnemonic(text);
if (mnemonic != '\0') {
shortcut = "Alt+" + mnemonic; //$NON-NLS-1$
}
}
}
e.result = shortcut;
}
public void getHelp(AccessibleEvent e) {
e.result = getToolTipText();
}
};
getAccessible().addAccessibleListener(accessibleAdapter);
text.getAccessible().addAccessibleListener(accessibleAdapter);
table.getAccessible().addAccessibleListener(accessibleAdapter);
arrow.getAccessible().addAccessibleListener(new AccessibleAdapter() {
public void getName(AccessibleEvent e) {
e.result = isDropped() ? SWT.getMessage("SWT_Close") : SWT.getMessage("SWT_Open"); //$NON-NLS-1$ //$NON-NLS-2$
}
public void getKeyboardShortcut(AccessibleEvent e) {
e.result = "Alt+Down Arrow"; //$NON-NLS-1$
}
public void getHelp(AccessibleEvent e) {
e.result = getToolTipText();
}
});
getAccessible().addAccessibleTextListener(new AccessibleTextAdapter() {
public void getCaretOffset(AccessibleTextEvent e) {
e.offset = text.getCaretPosition();
}
public void getSelectionRange(AccessibleTextEvent e) {
Point sel = text.getSelection();
e.offset = sel.x;
e.length = sel.y - sel.x;
}
});
getAccessible().addAccessibleControlListener(new AccessibleControlAdapter() {
public void getChildAtPoint(AccessibleControlEvent e) {
Point testPoint = toControl(e.x, e.y);
if (getBounds().contains(testPoint)) {
e.childID = ACC.CHILDID_SELF;
}
}
public void getLocation(AccessibleControlEvent e) {
Rectangle location = getBounds();
Point pt = getParent().toDisplay(location.x, location.y);
e.x = pt.x;
e.y = pt.y;
e.width = location.width;
e.height = location.height;
}
public void getChildCount(AccessibleControlEvent e) {
e.detail = 0;
}
public void getRole(AccessibleControlEvent e) {
e.detail = ACC.ROLE_COMBOBOX;
}
public void getState(AccessibleControlEvent e) {
e.detail = ACC.STATE_NORMAL;
}
public void getValue(AccessibleControlEvent e) {
e.result = text.getText();
}
});
text.getAccessible().addAccessibleControlListener(new AccessibleControlAdapter() {
public void getRole(AccessibleControlEvent e) {
e.detail = text.getEditable() ? ACC.ROLE_TEXT : ACC.ROLE_LABEL;
}
});
arrow.getAccessible().addAccessibleControlListener(new AccessibleControlAdapter() {
public void getDefaultAction(AccessibleControlEvent e) {
e.result = isDropped() ? SWT.getMessage("SWT_Close") : SWT.getMessage("SWT_Open"); //$NON-NLS-1$ //$NON-NLS-2$
}
});
}
/**
* returns if the drop down is currently open
* @return
*/
private boolean isDropped() {
return popup.getVisible();
}
/**
* {@inheritDoc}
*/
public boolean isFocusControl() {
checkWidget();
//if (label.isFocusControl () || arrow.isFocusControl () || table.isFocusControl () || popup.isFocusControl ()) {
if (arrow.isFocusControl() || table.isFocusControl() || popup.isFocusControl()) {
return true;
}
return super.isFocusControl();
}
/**
* This method is invoked when a resize event occurs.
* @param changed
*/
private void internalLayout(boolean changed) {
if (isDropped())
dropDown(false);
Rectangle rect = getClientArea();
int width = rect.width;
int height = rect.height;
Point arrowSize = arrow.computeSize(SWT.DEFAULT, height, changed);
if (selectedImage.getImage() == null) {
selectedImage.setBounds(0, 0, 0, 0);
text.setBounds(0, 0, width - arrowSize.x, height);
arrow.setBounds(width - arrowSize.x, 0, arrowSize.x, arrowSize.y);
} else {
int imageWidth = selectedImage.computeSize(SWT.DEFAULT, height, changed).x + 2;
int textWidth = width - imageWidth - arrowSize.x;
selectedImage.setBounds(0, 0, imageWidth, height);
text.setBounds(imageWidth, 0, textWidth, height);
arrow.setBounds(imageWidth + textWidth, 0, arrowSize.x, arrowSize.y);
}
}
/**
* Handles Table Events.
* @param event
* @throws IllegalAccessException
* @throws InvocationTargetException
* @throws NoSuchMethodException
*/
private void tableEvent(Event event) {
switch (event.type) {
case SWT.Dispose:
if (getShell() != popup.getParent()) {
int selectionIndex = table.getSelectionIndex();
popup = null;
table = null;
createPopup(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 = table.getSelectionIndex();
if (index == -1)
return;
// refresh the text.
refreshText(index);
// set the selection in the table.
table.setSelection(index);
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;
case SWT.TRAVERSE_TAB_NEXT:
case SWT.TRAVERSE_TAB_PREVIOUS:
event.doit = text.traverse(event.detail);
event.detail = SWT.TRAVERSE_NONE;
if (event.doit)
dropDown(false);
return;
}
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 || event.character == SWT.LF) {
// 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;
}
}
}
/**
* Pastes text from clipboard.
* <p>
* The selected text is deleted from the widget
* and new text inserted from the clipboard.
* </p>
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.3
*/
public void paste() {
checkWidget();
text.paste();
}
/**
* Handles Popup Events
* @param event
*/
private void popupEvent(Event event) {
switch (event.type) {
case SWT.Paint:
// draw rectangle around table
Rectangle tableRect = table.getBounds();
event.gc.setForeground(getDisplay().getSystemColor(SWT.COLOR_LIST_SELECTION));
event.gc.drawRectangle(0, 0, tableRect.width + 1, tableRect.height + 1);
break;
case SWT.Close:
event.doit = false;
dropDown(false);
break;
case SWT.Deactivate:
/*
* Bug in GTK. When the arrow button is pressed the popup control receives a
* deactivate event and then the arrow button receives a selection event. If
* we hide the popup in the deactivate event, the selection event will show
* it again. To prevent the popup from showing again, we will let the selection
* event of the arrow button hide the popup.
* In Windows, hiding the popup during the deactivate causes the deactivate
* to be called twice and the selection event to be disappear.
*/
if (!"carbon".equals(SWT.getPlatform())) {
Point point = arrow.toControl(getDisplay().getCursorLocation());
Point size = arrow.getSize();
Rectangle rect = new Rectangle(0, 0, size.x, size.y);
if (!rect.contains(point))
dropDown(false);
} else {
dropDown(false);
}
break;
}
}
/**
* {@inheritDoc}
*/
public void redraw() {
super.redraw();
text.redraw();
arrow.redraw();
if (popup.isVisible())
table.redraw();
}
/**
* {@inheritDoc}
*/
public void redraw(int x, int y, int width, int height, boolean all) {
super.redraw(x, y, width, height, true);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the receiver's text is modified.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see ModifyListener
* @see #addModifyListener
*/
public void removeModifyListener(ModifyListener listener) {
checkWidget();
if (listener == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
removeListener(SWT.Modify, listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the user changes the receiver's selection.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see SelectionListener
* @see #addSelectionListener
*/
public void removeSelectionListener(SelectionListener listener) {
checkWidget();
if (listener == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
removeListener(SWT.Selection, listener);
removeListener(SWT.DefaultSelection, listener);
}
/**
* Removes the listener from the collection of listeners who will
* be notified when the control is verified.
*
* @param listener the listener which should no longer be notified
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the listener is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @see VerifyListener
* @see #addVerifyListener
*
* @since 3.3
*/
public void removeVerifyListener(VerifyListener listener) {
checkWidget();
if (listener == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
removeListener(SWT.Verify, listener);
}
/**
* Selects the item at the given zero-relative index in the receiver's
* list. If the item at the index was already selected, it remains
* selected. Indices that are out of range are ignored.
*
* @param index the index of the item to select
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void select(int index) {
checkWidget();
// deselect if a value of -1 is passed in.
if (index == -1) {
table.deselectAll();
text.setText("");
selectedImage.setImage(null);
return;
}
if (0 <= index && index < table.getItemCount()) {
if (index != getSelectionIndex()) {
// refresh the text field and image label
refreshText(index);
// select the row in the table.
table.select(index);
table.showSelection();
}
}
}
/**
* {@inheritDoc}
*/
public void setBackground(Color color) {
super.setBackground(color);
background = color;
if (text != null)
text.setBackground(color);
if (selectedImage != null)
selectedImage.setBackground(color);
if (table != null)
table.setBackground(color);
if (arrow != null)
arrow.setBackground(color);
}
/**
* Sets the editable state.
*
* @param editable the new editable state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.0
*/
public void setEditable(boolean editable) {
checkWidget();
text.setEditable(editable);
}
/**
* {@inheritDoc}
*/
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
if (popup != null)
popup.setVisible(false);
if (selectedImage != null)
selectedImage.setEnabled(enabled);
if (text != null)
text.setEnabled(enabled);
if (arrow != null)
arrow.setEnabled(enabled);
}
/**
* {@inheritDoc}
*/
public boolean setFocus() {
checkWidget();
if (!isEnabled() || !isVisible())
return false;
if (isFocusControl())
return true;
return text.setFocus();
}
/**
* {@inheritDoc}
*/
public void setFont(Font font) {
super.setFont(font);
this.font = font;
text.setFont(font);
table.setFont(font);
internalLayout(true);
}
/**
* {@inheritDoc}
*/
public void setForeground(Color color) {
super.setForeground(color);
foreground = color;
if (text != null)
text.setForeground(color);
if (table != null)
table.setForeground(color);
if (arrow != null)
arrow.setForeground(color);
}
/**
* Sets the layout which is associated with the receiver to be
* the argument which may be null.
* <p>
* Note : No Layout can be set on this Control because it already
* manages the size and position of its children.
* </p>
*
* @param layout the receiver's new layout or null
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setLayout(Layout layout) {
checkWidget();
return;
}
/**
* Marks the receiver's list as visible if the argument is <code>true</code>,
* and marks it invisible otherwise.
* <p>
* If one of the receiver's ancestors is not visible or some
* other condition makes the receiver not visible, marking
* it visible may not actually cause it to be displayed.
* </p>
*
* @param visible the new visibility state
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.4
*/
public void setTableVisible(boolean visible) {
checkWidget();
dropDown(visible);
}
/**
* Sets the selection in the receiver's text field to the
* range specified by the argument whose x coordinate is the
* start of the selection and whose y coordinate is the end
* of the selection.
*
* @param selection a point representing the new selection start and end
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the point is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setSelection(Point selection) {
checkWidget();
if (selection == null)
SWT.error(SWT.ERROR_NULL_ARGUMENT);
text.setSelection(selection.x, selection.y);
}
/**
* Sets the contents of the receiver's text field to the
* given string.
* <p>
* Note: The text field in a <code>Combo</code> is typically
* only capable of displaying a single line of text. Thus,
* setting the text to a string containing line breaks or
* other special characters will probably cause it to
* display incorrectly.
* </p>
*
* @param string the new text
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setText(String string) {
checkWidget();
if (string == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
// find the index of the given string.
int index = indexOf(string);
if (index == -1) {
table.deselectAll();
text.setText(string);
return;
}
// select the text and table row.
select(index);
}
/**
* Sets the maximum number of characters that the receiver's
* text field is capable of holding to be the argument.
*
* @param limit new text limit
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_CANNOT_BE_ZERO - if the limit is zero</li>
* </ul>
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*/
public void setTextLimit(int limit) {
checkWidget();
text.setTextLimit(limit);
}
/**
* {@inheritDoc}
*/
public void setToolTipText(String tipText) {
checkWidget();
super.setToolTipText(tipText);
if (selectedImage != null)
selectedImage.setToolTipText(tipText);
if (text != null)
text.setToolTipText(tipText);
if (arrow != null)
arrow.setToolTipText(tipText);
}
/**
* {@inheritDoc}
*/
public void setVisible(boolean visible) {
super.setVisible(visible);
/*
* At this point the widget may have been disposed in a FocusOut event.
* If so then do not continue.
*/
if (isDisposed())
return;
// TEMPORARY CODE
if (popup == null || popup.isDisposed())
return;
if (!visible)
popup.setVisible(false);
}
/**
* Sets the number of items that are visible in the drop
* down portion of the receiver's list.
*
* @param count the new number of items to be visible
*
* @exception SWTException <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed</li>
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver</li>
* </ul>
*
* @since 3.0
*/
public void setVisibleItemCount(int count) {
checkWidget();
if (count > 0) {
visibleItemCount = count;
}
}
/**
* @param string
* @return
*/
private String stripMnemonic(String string) {
int index = 0;
int length = string.length();
do {
while ((index < length) && (string.charAt(index) != '&'))
index++;
if (++index >= length)
return string;
if (string.charAt(index) != '&') {
return string.substring(0, index - 1) + string.substring(index, length);
}
index++;
} while (index < length);
return string;
}
/**
* Defines what columns the drop down table will have.
*
* Use this method when you don't care about the width of the columns but
* want to set the column header text.
* @param columnHeaders
* @param columnWidths
*/
public void defineColumns(String[] columnHeaders) {
if (columnHeaders != null && columnHeaders.length > 0) {
defineColumnsInternal(columnHeaders, null, columnHeaders.length);
}
}
/**
* Defines what columns the drop down table will have.
*
* Use this method when you don't care about the column
* header text but you want the fields to be a specific
* width.
* @param columnHeaders
* @param columnBounds
*/
public void defineColumns(int[] columnBounds) {
this.columnWidths = columnBounds;
if (columnBounds != null && columnBounds.length > 0) {
defineColumnsInternal(null, columnBounds, columnBounds.length);
}
}
/**
* Defines what columns the drop down table will have.
*
* Use this method when you don't care about the column headers and
* you want the columns to be automatically sized based upon their content.
*
* @param columnHeaders
* @param columnWidths
*/
public void defineColumns(int numberOfColumnsToCreate) {
if (numberOfColumnsToCreate > 0) {
defineColumnsInternal(null, null, numberOfColumnsToCreate);
}
}
/**
* Defines what columns the drop down table will have.
*
* Use this method when you want to specify the column header text and the
* column widths.
*
* @param columnHeaders
* @param columnBounds
*/
public void defineColumns(String[] columnHeaders, int[] columnBounds) {
if (columnHeaders != null || columnBounds != null) {
int total = columnHeaders == null ? 0 : columnHeaders.length;
if (columnBounds != null && columnBounds.length > total) {
total = columnBounds.length;
}
this.columnWidths = columnBounds;
// define the columns
defineColumnsInternal(columnHeaders, columnBounds, total);
}
}
/**
* Defines what columns the drop down table will have.
*
* @param columnHeaders
* @param columnBounds
*/
private void defineColumnsInternal(String[] columnHeaders, int[] columnBounds, int totalColumnsToBeCreated) {
checkWidget();
int totalColumnHeaders = columnHeaders == null ? 0 : columnHeaders.length;
int totalColBounds = columnBounds == null ? 0 : columnBounds.length;
if (totalColumnsToBeCreated > 0) {
for (int index = 0; index < totalColumnsToBeCreated; index++) {
TableColumn column = new TableColumn(table, SWT.NONE);
if (index < totalColumnHeaders) {
column.setText(columnHeaders[index]);
}
if (index < totalColBounds) {
column.setWidth(columnBounds[index]);
}
column.setResizable(true);
column.setMoveable(true);
}
}
}
/**
* Sets the table width percentage in relation to the width of the label control.
*
* The default value if 100% which means that it will be the same size as the label
* control. If you want the table to be wider than the label then just display a value
* higher than 100%.
* @param ddWidthPct
*/
public void setTableWidthPercentage(int ddWidthPct) {
checkWidget();
// don't accept invalid input.
if (ddWidthPct > 0 && ddWidthPct <= 100) {
this.tableWidthPercentage = ddWidthPct;
}
}
/**
* Sets the zero-relative column index that will be used to display
* the currently selected item in the label control.
*
* @param displayColumnIndex
*/
public void setDisplayColumnIndex(int displayColumnIndex) {
checkWidget();
if (displayColumnIndex >= 0) {
this.displayColumnIndex = displayColumnIndex;
}
}
/**
* returns the column index of the TableColumn to be displayed when selected.
* @return
*/
private int getDisplayColumnIndex() {
// make sure the requested column index is valid.
return (displayColumnIndex <= (table.getColumnCount() - 1) ? displayColumnIndex : 0);
}
/*
* Return the lowercase of the first non-'&' character following
* an '&' character in the given string. If there are no '&'
* characters in the given string, return '\0'.
*/
private char _findMnemonic(String string) {
if (string == null)
return '\0';
int index = 0;
int length = string.length();
do {
while (index < length && string.charAt(index) != '&')
index++;
if (++index >= length)
return '\0';
if (string.charAt(index) != '&')
return Character.toLowerCase(string.charAt(index));
index++;
} while (index < length);
return '\0';
}
/**
* Refreshes the label control with the selected object's details.
*/
private void refreshText(int index) {
// get a reference to the selected TableItem
TableItem tableItem = table.getItem(index);
// get the TableItem index to use for displaying the text.
int colIndexToUse = getDisplayColumnIndex();
// set image if requested
if (showImageWithinSelection) {
// set the selected image
selectedImage.setImage(tableItem.getImage(colIndexToUse));
// refresh the layout of the widget
internalLayout(false);
}
// set color if requested
if (showColorWithinSelection) {
text.setForeground(tableItem.getForeground(colIndexToUse));
}
// set font if requested
if (showFontWithinSelection) {
// set the selected font
text.setFont(tableItem.getFont(colIndexToUse));
}
// set the label text.
text.setText(tableItem.getText(colIndexToUse));
text.selectAll();
}
/**
* @param showImageWithinSelection
*/
public void setShowImageWithinSelection(boolean showImageWithinSelection) {
checkWidget();
this.showImageWithinSelection = showImageWithinSelection;
}
/**
* @param showColorWithinSelection
*/
public void setShowColorWithinSelection(boolean showColorWithinSelection) {
checkWidget();
this.showColorWithinSelection = showColorWithinSelection;
}
/**
* @param showFontWithinSelection
*/
public void setShowFontWithinSelection(boolean showFontWithinSelection) {
checkWidget();
this.showFontWithinSelection = showFontWithinSelection;
}
/**
* returns the Table reference.
*
* NOTE: the access is public for now but will most likely be changed in a
* future release.
*
* @return
*/
public Table getTable() {
checkWidget();
return table;
}
/**
* determines if the user explicitly set a column width for a given column index.
* @param columnIndex
* @return
*/
private boolean wasColumnWidthSpecified(int columnIndex) {
return (columnWidths != null && columnWidths.length > columnIndex && columnWidths[columnIndex] != SWT.DEFAULT);
}
void textEvent(Event event) {
switch (event.type) {
case SWT.FocusIn: {
handleFocus(SWT.FocusIn);
break;
}
case SWT.DefaultSelection: {
dropDown(false);
Event e = new Event();
e.time = event.time;
e.stateMask = event.stateMask;
notifyListeners(SWT.DefaultSelection, e);
break;
}
case SWT.KeyDown: {
Event keyEvent = new Event();
keyEvent.time = event.time;
keyEvent.character = event.character;
keyEvent.keyCode = event.keyCode;
keyEvent.stateMask = event.stateMask;
notifyListeners(SWT.KeyDown, keyEvent);
if (isDisposed())
break;
event.doit = keyEvent.doit;
if (!event.doit)
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 = table.getSelectionIndex();
if (event.keyCode == SWT.ARROW_UP) {
select(Math.max(oldIndex - 1, 0));
} else {
select(Math.min(oldIndex + 1, getItemCount() - 1));
}
if (oldIndex != table.getSelectionIndex()) {
Event e = new Event();
e.time = event.time;
e.stateMask = event.stateMask;
notifyListeners(SWT.Selection, e);
}
if (isDisposed())
break;
}
// Further work : Need to add support for incremental search in
// pop up list as characters typed in text widget
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);
event.doit = e.doit;
break;
}
case SWT.MenuDetect: {
Event e = new Event();
e.time = event.time;
notifyListeners(SWT.MenuDetect, e);
break;
}
case SWT.Modify: {
table.deselectAll();
Event e = new Event();
e.time = event.time;
notifyListeners(SWT.Modify, e);
break;
}
case SWT.MouseDown: {
Event mouseEvent = new Event();
mouseEvent.button = event.button;
mouseEvent.count = event.count;
mouseEvent.stateMask = event.stateMask;
mouseEvent.time = event.time;
mouseEvent.x = event.x;
mouseEvent.y = event.y;
notifyListeners(SWT.MouseDown, mouseEvent);
if (isDisposed())
break;
event.doit = mouseEvent.doit;
if (!event.doit)
break;
if (event.button != 1)
return;
if (text.getEditable())
return;
boolean dropped = isDropped();
text.selectAll();
if (!dropped)
setFocus();
dropDown(!dropped);
break;
}
case SWT.MouseUp: {
Event mouseEvent = new Event();
mouseEvent.button = event.button;
mouseEvent.count = event.count;
mouseEvent.stateMask = event.stateMask;
mouseEvent.time = event.time;
mouseEvent.x = event.x;
mouseEvent.y = event.y;
notifyListeners(SWT.MouseUp, mouseEvent);
if (isDisposed())
break;
event.doit = mouseEvent.doit;
if (!event.doit)
break;
if (event.button != 1)
return;
if (text.getEditable())
return;
text.selectAll();
break;
}
case SWT.MouseDoubleClick: {
Event mouseEvent = new Event();
mouseEvent.button = event.button;
mouseEvent.count = event.count;
mouseEvent.stateMask = event.stateMask;
mouseEvent.time = event.time;
mouseEvent.x = event.x;
mouseEvent.y = event.y;
notifyListeners(SWT.MouseDoubleClick, mouseEvent);
break;
}
case SWT.MouseWheel: {
Event keyEvent = new Event();
keyEvent.time = event.time;
keyEvent.keyCode = event.count > 0 ? SWT.ARROW_UP : SWT.ARROW_DOWN;
keyEvent.stateMask = event.stateMask;
notifyListeners(SWT.KeyDown, keyEvent);
if (isDisposed())
break;
event.doit = keyEvent.doit;
if (!event.doit)
break;
if (event.count != 0) {
event.doit = false;
int oldIndex = table.getSelectionIndex();
if (event.count > 0) {
select(Math.max(oldIndex - 1, 0));
} else {
select(Math.min(oldIndex + 1, getItemCount() - 1));
}
if (oldIndex != table.getSelectionIndex()) {
Event e = new Event();
e.time = event.time;
e.stateMask = event.stateMask;
notifyListeners(SWT.Selection, e);
}
if (isDisposed())
break;
}
break;
}
case SWT.Traverse: {
switch (event.detail) {
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;
case SWT.TRAVERSE_TAB_PREVIOUS:
event.doit = traverse(SWT.TRAVERSE_TAB_PREVIOUS);
event.detail = SWT.TRAVERSE_NONE;
return;
}
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.Verify: {
Event e = new Event();
e.text = event.text;
e.start = event.start;
e.end = event.end;
e.character = event.character;
e.keyCode = event.keyCode;
e.stateMask = event.stateMask;
notifyListeners(SWT.Verify, e);
event.doit = e.doit;
break;
}
}
}
/**
* adjusts the table column widths to fit inside of the table if the table
* column data does not fill out the table area.
*/
private void autoAdjustColumnWidthsIfNeeded(TableColumn[] tableColumns, int totalAvailWidth,
int totalColumnWidthUsage) {
int totalColumns = (tableColumns == null ? 0 : tableColumns.length);
int scrollBarSize = 0;
// determine if the vertical scroll bar needs to be taken into account
if (table.getItemCount() > visibleItemCount) {
scrollBarSize = (table.getVerticalBar() == null ? 0 : table.getVerticalBar().getSize().x);
}
// is there any extra space that the table is not using?
if (totalAvailWidth > totalColumnWidthUsage + scrollBarSize) {
int totalAmtToBeAllocated = (totalAvailWidth - totalColumnWidthUsage - scrollBarSize);
int totalBufferAmount = (int) Math.floor(totalAmtToBeAllocated / totalColumns);
// add the buffer amount to each column
for (int colIndex = 0; colIndex < totalColumns; colIndex++) {
tableColumns[colIndex].setWidth(tableColumns[colIndex].getWidth() + totalBufferAmount);
totalAmtToBeAllocated -= totalBufferAmount;
}
// allocate any remainder to the last column.
if (totalAmtToBeAllocated > 0) {
tableColumns[totalColumns - 1].setWidth(tableColumns[totalColumns - 1].getWidth()
+ totalAmtToBeAllocated);
}
}
}
/**
* Returns the Text control reference.
* @return
*/
public Text getTextControl() {
checkWidget();
return text;
}
}