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MultiChoice.java
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MultiChoice.java
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/*******************************************************************************
* Copyright (c) 2011 Laurent CARON.
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors: Laurent CARON (laurent.caron@gmail.com) - initial API and
* implementation
*******************************************************************************/
package org.eclipse.nebula.widgets.opal.multichoice;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import org.eclipse.nebula.widgets.opal.commons.ResourceManager;
import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.events.SelectionListener;
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.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
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.Link;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
/**
* The MultiChoice class represents a selectable user interface object that
* combines a read-only text-field and a set of checkboxes.
*
* <p>
* Note that 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>NONE</dd>
* <dt><b>Events:</b>
* <dd>Selection</dd>
* </dl>
*
* @param <T> Class of objects represented by this widget
*/
public class MultiChoice<T> extends Composite {
private Text text;
private Button arrow;
private Shell popup;
private ScrolledComposite scrolledComposite;
private Listener listener, filter;
private int numberOfColumns = 2;
private List<T> elements;
private Set<T> selection;
private List<Button> checkboxes;
private boolean hasFocus;
private MultiChoiceSelectionListener<T> selectionListener;
private T lastModified;
private Color foreground, background;
private Font font;
private String separator;
private MultiChoiceLabelProvider labelProvider;
private int preferredHeightOfPopup;
private boolean showSelectUnselectAll;
/**
* Constructs a new instance of this class given its parent.
*
* @param parent a widget which will be the parent of the new instance (cannot
* be null)
* @param style not used
*
* @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>
*/
public MultiChoice(final Composite parent, final int style) {
this(parent, style, null);
}
/**
* Constructs a new instance of this class given its parent.
*
* @param parent a widget which will be the parent of the new instance (cannot
* be null)
* @param style not used
* @param elements list of elements displayed by this widget
*
* @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>
*/
public MultiChoice(final Composite parent, final int style, final List<T> elements) {
super(parent, style);
final GridLayout gridLayout = new GridLayout(2, false);
gridLayout.horizontalSpacing = gridLayout.verticalSpacing = gridLayout.marginWidth = gridLayout.marginHeight = 0;
setLayout(gridLayout);
int readOnlyStyle;
if ((style & SWT.READ_ONLY) == SWT.READ_ONLY) {
readOnlyStyle = SWT.READ_ONLY;
} else {
readOnlyStyle = SWT.NONE;
}
this.text = new Text(this, SWT.SINGLE | readOnlyStyle | SWT.BORDER);
this.text.setBackground(getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND));
this.text.setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, false));
this.arrow = new Button(this, SWT.ARROW | SWT.RIGHT);
this.arrow.setLayoutData(new GridData(GridData.FILL, GridData.FILL, false, false));
createGlobalListener();
addListeners();
this.filter = event -> {
final Shell shell = ((Control) event.widget).getShell();
if (shell == MultiChoice.this.getShell()) {
handleFocusEvents(SWT.FocusOut);
}
};
this.selection = new LinkedHashSet<>();
this.elements = elements;
this.separator = ",";
this.labelProvider = new MultiChoiceDefaultLabelProvider();
createPopup();
setLabel();
}
private void createGlobalListener() {
this.listener = event -> {
if (MultiChoice.this.popup == event.widget) {
handlePopupEvent(event);
return;
}
if (MultiChoice.this.arrow == event.widget) {
handleButtonEvent(event);
return;
}
if (MultiChoice.this == event.widget) {
handleMultiChoiceEvents(event);
return;
}
if (getShell() == event.widget) {
getDisplay().asyncExec(() -> {
if (isDisposed()) {
return;
}
handleFocusEvents(SWT.FocusOut);
});
}
};
}
private void addListeners() {
final int[] multiChoiceEvent = { SWT.Dispose, SWT.Move, SWT.Resize };
for (final int element : multiChoiceEvent) {
addListener(element, this.listener);
}
if ((getStyle() & SWT.READ_ONLY) == 0) {
final Listener validationListener = event -> {
if (!MultiChoice.this.popup.isDisposed() && !MultiChoice.this.popup.isVisible()) {
validateEntry();
}
};
this.text.addListener(SWT.FocusOut, validationListener);
}
final int[] buttonEvents = { SWT.Selection, SWT.FocusIn };
for (final int buttonEvent : buttonEvents) {
this.arrow.addListener(buttonEvent, this.listener);
}
}
protected void validateEntry() {
final String toValidate = this.text.getText();
final String[] elementsToValidate = toValidate.split(this.separator);
final List<String> fieldsInError = new ArrayList<>();
this.selection.clear();
for (final String elementToValidate : elementsToValidate) {
final String temp = elementToValidate.trim();
if ("".equals(temp)) {
continue;
}
final T entry = convertEntry(temp);
if (entry == null) {
fieldsInError.add(temp);
} else {
this.selection.add(entry);
}
}
if (fieldsInError.size() == 0) {
updateSelection();
return;
}
final String messageToDisplay;
if (fieldsInError.size() == 1) {
messageToDisplay = String.format(ResourceManager.getLabel(ResourceManager.MULTICHOICE_MESSAGE), //
fieldsInError.get(0));
} else {
final StringBuilder sb = new StringBuilder();
final Iterator<String> it = fieldsInError.iterator();
while (it.hasNext()) {
sb.append(it.next());
if (it.hasNext()) {
sb.append(",");
}
}
messageToDisplay = String.format(ResourceManager.getLabel(ResourceManager.MULTICHOICE_MESSAGE_PLURAL), //
sb.toString());
}
getDisplay().asyncExec(() -> {
final MessageBox mb = new MessageBox(getShell(), SWT.OK | SWT.ICON_ERROR);
mb.setMessage(messageToDisplay);
mb.open();
MultiChoice.this.text.forceFocus();
});
}
private T convertEntry(final String elementToValidate) {
for (final T elt : this.elements) {
if (this.labelProvider.getText(elt).trim().equals(elementToValidate)) {
return elt;
}
}
return null;
}
/**
* Adds the argument to the end of the receiver's list.
*
* @param values new 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 void add(final T value) {
checkWidget();
if (value == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
if (this.elements == null) {
this.elements = new ArrayList<>();
}
this.elements.add(value);
refresh();
}
/**
* Adds the argument to the receiver's list at the given zero-relative index.
*
* @param values new item
* @param index the index for the item
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the string is null</li>
* <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 void add(final T value, final int index) {
checkWidget();
checkNullElement();
if (value == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
checkRange(index);
this.elements.add(index, value);
refresh();
}
/**
* Adds the argument to the end of the receiver's list.
*
* @param values new items
* @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 addAll(final List<T> values) {
checkWidget();
if (values == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
if (this.elements == null) {
this.elements = new ArrayList<>();
}
this.elements.addAll(values);
refresh();
}
/**
* Adds the argument to the end of the receiver's list.
*
* @param values new items
* @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 addAll(final T[] values) {
checkWidget();
if (values == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
if (this.elements == null) {
this.elements = new ArrayList<>();
}
for (final T value : values) {
this.elements.add(value);
}
refresh();
}
/**
* Returns 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>
*/
public boolean getEditable() {
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 NullPointerException if there is no item in the receiver
* @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 T getItem(final int index) {
checkWidget();
checkNullElement();
checkRange(index);
return this.elements.get(index);
}
/**
* 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();
if (this.elements == null) {
return 0;
}
return this.elements.size();
}
/**
* Returns the list of 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 List<T> getItems() {
checkWidget();
if (this.elements == null) {
return null;
}
return new ArrayList<>(this.elements);
}
/**
* Removes the item from the receiver's list at the given zero-relative index.
*
* @param index the index for the item
* @exception NullPointerException if there is no item in the receiver
* @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 void removeAt(final int index) {
checkWidget();
checkNullElement();
checkRange(index);
final Object removedElement = this.elements.remove(index);
this.selection.remove(removedElement);
refresh();
}
/**
* Searches the receiver's list starting at the first item until an item is
* found that is equal to the argument, and removes that item from the list.
*
* @param object the item to remove
* @exception NullPointerException if there is no item in the receiver
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the object 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 remove(final T object) {
if (object == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
checkWidget();
checkNullElement();
this.elements.remove(object);
this.selection.remove(object);
refresh();
}
/**
* Remove all items of the receiver
*
* @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 removeAll() {
checkWidget();
checkNullElement();
if (this.elements != null) {
this.elements.clear();
}
this.selection.clear();
refresh();
}
/**
* @param labelProvider the Label Provider to set
*/
public void setLabelProvider(final MultiChoiceLabelProvider labelProvider) {
this.labelProvider = labelProvider;
}
/**
* Sets the selection of the receiver. If the item was already selected, it
* remains selected.
*
* @param selection the new selection
* @exception NullPointerException if there is no item in the receiver
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the selection 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(final Set<T> selection) {
checkWidget();
checkNullElement();
if (selection == null) {
SWT.error(SWT.ERROR_NULL_ARGUMENT);
}
this.selection = selection;
updateSelection();
}
/**
* Selects all selected items in the receiver's list.
*
* @exception NullPointerException if there is no item in the receiver
* @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 selectAll() {
checkWidget();
checkNullElement();
this.selection.addAll(this.elements);
updateSelection();
}
/**
* 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.
*
* @param index the index of the item to select
* @exception NullPointerException if there is no item in the receiver
* @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 void selectAt(final int index) {
checkWidget();
checkNullElement();
checkRange(index);
this.selection.add(this.elements.get(index));
updateSelection();
}
/**
* Selects an item the receiver's list. If the item was already selected, it
* remains selected.
*
* @param index the index of the item to select
* @exception NullPointerException if there is no item in the receiver
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the selection 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 select(final T value) {
checkWidget();
checkNullElement();
if (!this.elements.contains(value)) {
throw new IllegalArgumentException("Value not present in the widget");
}
this.selection.add(value);
updateSelection();
}
/**
* Selects items in the receiver. If the items were already selected, they
* remain selected.
*
* @param index the indexes of the items to select
* @exception NullPointerException if there is no item in the receiver
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the selection is null</li>
* <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 void setSelectedIndex(final int[] index) {
checkWidget();
checkNullElement();
for (final int i : index) {
checkRange(i);
this.selection.add(this.elements.get(i));
}
updateSelection();
}
/**
* Returns the zero-relative indices of the items which are currently selected
* in the receiver. The order of the indices is unspecified. The array is empty
* if no items are selected.
* <p>
* Note: This is not the actual structure used by the receiver to maintain its
* selection, so modifying the array will not affect the receiver.
* </p>
*
* @return the array of indices of the selected items
* @exception NullPointerException if there is no item in the receiver
* @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[] getSelectedIndex() {
checkWidget();
checkNullElement();
final List<Integer> selectedIndex = new ArrayList<>();
for (int i = 0; i < this.elements.size(); i++) {
if (this.selection.contains(this.elements.get(i))) {
selectedIndex.add(i);
}
}
final int[] returned = new int[selectedIndex.size()];
for (int i = 0; i < selectedIndex.size(); i++) {
returned[i] = selectedIndex.get(i);
}
return returned;
}
/**
* Returns an array of <code>Object</code>s that are currently selected in the
* receiver. The order of the items is unspecified. An empty array indicates
* that no items are selected.
* <p>
* Note: This is not the actual structure used by the receiver to maintain its
* selection, so modifying the array will not affect the receiver.
* </p>
*
* @return an array representing the selection
* @exception NullPointerException if there is no item in the receiver
* @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 List<T> getSelection() {
checkWidget();
checkNullElement();
return new ArrayList<>(this.selection);
}
/**
* Deselects the item at the given zero-relative index in the receiver's list.
* If the item at the index was already deselected, it remains deselected.
* Indices that are out of range are ignored.
*
* @param index the index of the item to deselect
* @exception NullPointerException if there is no item in the receiver
* @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 void deselectAt(final int index) {
checkWidget();
checkNullElement();
if (index < 0 || index >= this.elements.size()) {
SWT.error(SWT.ERROR_INVALID_RANGE);
}
this.selection.remove(index);
updateSelection();
}
/**
* Deselects the item in the receiver's list. If the item at the index was
* already deselected, it remains deselected.
*
* @param value the item to deselect
* @exception NullPointerException if there is no item in the receiver
* @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 void deselect(final T value) {
checkWidget();
checkNullElement();
this.selection.remove(value);
updateSelection();
}
/**
* Deselects all items in the receiver's list.
*
* @param value the item to deselect
* @exception NullPointerException if there is no item in the receiver
*
* @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 deselectAll() {
checkWidget();
checkNullElement();
this.selection.clear();
updateSelection();
}
/**
* @return the number of columns
*/
public int getNumberOfColumns() {
checkWidget();
return this.numberOfColumns;
}
/**
* @param numberOfColumns the number of columns
*/
public void setNumberOfColumns(final int numberOfColumns) {
checkWidget();
this.numberOfColumns = numberOfColumns;
this.popup.dispose();
this.popup = null;
createPopup();
}
/**
* @return the separator used in the text field. Default value is ","
*/
public String getSeparator() {
return this.separator;
}
/**
* @param separator the new value of the separator
*/
public void setSeparator(final String separator) {
this.separator = separator;
}
/**
* @see org.eclipse.swt.widgets.Control#getForeground()
*/
@Override
public Color getForeground() {
return this.foreground;
}
/**
* @see org.eclipse.swt.widgets.Control#setForeground(org.eclipse.swt.graphics.Color)
*/
@Override
public void setForeground(final Color foreground) {
this.foreground = foreground;
}
/**
* @see org.eclipse.swt.widgets.Control#getBackground()
*/
@Override
public Color getBackground() {
return this.background;
}
/**
* @see org.eclipse.swt.widgets.Control#setBackground(org.eclipse.swt.graphics.Color)
*/
@Override
public void setBackground(final Color background) {
this.background = background;
}
/**
* @see org.eclipse.swt.widgets.Control#getFont()
*/
@Override
public Font getFont() {
return this.font;
}
/**
* @see org.eclipse.swt.widgets.Control#setFont(org.eclipse.swt.graphics.Font)
*/
@Override
public void setFont(final Font font) {
this.font = font;
}
/**
* Refresh the widget (after the add of a new element for example)
*/
public void refresh() {
checkWidget();
this.popup.dispose();
this.popup = null;
createPopup();
updateSelection();
}
/**
* @see org.eclipse.swt.widgets.Composite#computeSize(int, int, boolean)
*/
@Override
public Point computeSize(final int wHint, final int hHint, final boolean changed) {
checkWidget();
int width = 0, height = 0;
final GC gc = new GC(this.text);
final int spacer = gc.stringExtent(" ").x;
final int textWidth = gc.stringExtent(this.text.getText()).x;
gc.dispose();
final Point textSize = this.text.computeSize(SWT.DEFAULT, SWT.DEFAULT, changed);
final Point arrowSize = this.arrow.computeSize(SWT.DEFAULT, SWT.DEFAULT, changed);
final int borderWidth = getBorderWidth();
height = Math.max(textSize.y, arrowSize.y);
width = textWidth + 2 * spacer + arrowSize.x + 2 * borderWidth;
if (wHint != SWT.DEFAULT) {
width = wHint;
}
if (hHint != SWT.DEFAULT) {
height = hHint;
}
return new Point(width + 2 * borderWidth, height + 2 * borderWidth);
}
/**
* @see org.eclipse.swt.widgets.Control#setEnabled(boolean)
*/
@Override
public void setEnabled(final boolean enabled) {
checkWidget();
this.arrow.setEnabled(enabled);
this.text.setEnabled(enabled);
super.setEnabled(enabled);
}
/**
* 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>
*/
public void setEditable(final boolean editable) {
checkWidget();
this.text.setEditable(editable);
this.text.setBackground(null);
}
/**
* @see org.eclipse.swt.widgets.Control#setToolTipText(java.lang.String)
*/
@Override
public void setToolTipText(final String txt) {
checkWidget();
this.text.setToolTipText(txt);
}
/**
* @return the selection listener
*/
public SelectionListener getSelectionListener() {
checkWidget();
return this.selectionListener;
}