package org.eclipse.swt.widgets; | |
/* | |
* (c) Copyright IBM Corp. 2000, 2001. | |
* All Rights Reserved | |
*/ | |
import org.eclipse.swt.internal.*; | |
import org.eclipse.swt.internal.motif.*; | |
import org.eclipse.swt.*; | |
import org.eclipse.swt.graphics.*; | |
import org.eclipse.swt.events.*; | |
/** | |
* Instances of this class are controls that allow the user | |
* to choose an item from a list of items, or optionally | |
* enter a new value by typing it into an editable text | |
* field. Often, <code>Combo</code>s are used in the same place | |
* where a single selection <code>List</code> widget could | |
* be used but space is limited. A <code>Combo</code> takes | |
* less space than a <code>List</code> widget and shows | |
* similar information. | |
* <p> | |
* Note: Since <code>Combo</code>s can contain both a list | |
* and an editable text field, it is possible to confuse methods | |
* which access one versus the other (compare for example, | |
* <code>clearSelection()</code> and <code>deselectAll()</code>). | |
* The API documentation is careful to indicate either "the | |
* receiver's list" or the "the receiver's text field" to | |
* distinguish between the two cases. | |
* </p><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></dt> | |
* <dd>DROP_DOWN, READ_ONLY, SIMPLE</dd> | |
* <dt><b>Events:</b></dt> | |
* <dd>DefaultSelection, Modify, Selection</dd> | |
* </dl> | |
* <p> | |
* IMPORTANT: This class is <em>not</em> intended to be subclassed. | |
* </p> | |
* | |
* @see List | |
*/ | |
public class Combo extends Composite { | |
/** | |
* the operating system limit for the number of characters | |
* that the text field in an instance of this class can hold | |
*/ | |
public static int LIMIT; | |
/* | |
* These values can be different on different platforms. | |
* Therefore they are not initialized in the declaration | |
* to stop the compiler from inlining. | |
*/ | |
static { | |
LIMIT = 0x7FFFFFFF; | |
} | |
boolean ignoreSelect; | |
/** | |
* 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 | |
* for all SWT widget classes should include a comment which | |
* describes the style constants which are applicable to the class. | |
* </p> | |
* | |
* @param parent a composite control which will be the parent of the new instance (cannot be null) | |
* @param style the style of control 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> | |
* <li>ERROR_INVALID_SUBCLASS - if this class is not an allowed subclass</li> | |
* </ul> | |
* | |
* @see SWT | |
* @see Widget#checkSubclass | |
* @see Widget#getStyle | |
*/ | |
public Combo (Composite parent, int style) { | |
super (parent, checkStyle (style)); | |
} | |
/** | |
* Adds the argument to the end of the receiver's list. | |
* | |
* @param string the 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> | |
* @exception SWTError <ul> | |
* <li>ERROR_ITEM_NOT_ADDED - if the operation fails because of an operating system failure</li> | |
* </ul> | |
* | |
* @see #add(String,int) | |
*/ | |
public void add (String string) { | |
checkWidget(); | |
if (string == null) error (SWT.ERROR_NULL_ARGUMENT); | |
byte [] buffer = Converter.wcsToMbcs (getCodePage (), encodeString(string), true); | |
int xmString = OS.XmStringCreateLocalized (buffer); | |
if (xmString == 0) error (SWT.ERROR_ITEM_NOT_ADDED); | |
OS.XmComboBoxAddItem(handle, xmString, -1, false); | |
OS.XmStringFree (xmString); | |
} | |
/** | |
* Adds the argument to the receiver's list at the given | |
* zero-relative index. | |
* <p> | |
* Note: To add an item at the end of the list, use the | |
* result of calling <code>getItemCount()</code> as the | |
* index or use <code>add(String)</code>. | |
* </p> | |
* | |
* @param string the 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 (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> | |
* @exception SWTError <ul> | |
* <li>ERROR_ITEM_NOT_ADDED - if the operation fails because of an operating system failure</li> | |
* </ul> | |
* | |
* @see #add(String) | |
*/ | |
public void add (String string, int index) { | |
checkWidget(); | |
if (string == null) error (SWT.ERROR_NULL_ARGUMENT); | |
if (index == -1) error (SWT.ERROR_INVALID_RANGE); | |
/* | |
* Feature in Motif. When an index is out of range, | |
* the list widget adds the item at the end. This | |
* behavior is not wrong but it is unwanted. The | |
* fix is to check the range before adding the item. | |
*/ | |
int [] argList = {OS.XmNitemCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
if (!(0 <= index && index <= argList [1])) { | |
error (SWT.ERROR_INVALID_RANGE); | |
} | |
byte [] buffer = Converter.wcsToMbcs (getCodePage (), encodeString(string), true); | |
int xmString = OS.XmStringCreateLocalized (buffer); | |
if (xmString == 0) error (SWT.ERROR_ITEM_NOT_ADDED); | |
OS.XmComboBoxAddItem(handle, xmString, index + 1, false); | |
OS.XmStringFree (xmString); | |
} | |
/** | |
* 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) 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 receiver's selection changes, 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 | |
* | |
* @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) error (SWT.ERROR_NULL_ARGUMENT); | |
TypedListener typedListener = new TypedListener (listener); | |
addListener (SWT.Selection,typedListener); | |
addListener (SWT.DefaultSelection,typedListener); | |
} | |
static int checkStyle (int style) { | |
/* | |
* Feature in Windows. It is not possible to create | |
* a combo box that has a border using Windows style | |
* bits. All combo boxes draw their own border and | |
* do not use the standard Windows border styles. | |
* Therefore, no matter what style bits are specified, | |
* clear the BORDER bits so that the SWT style will | |
* match the Windows widget. | |
* | |
* The Windows behavior is currently implemented on | |
* all platforms. | |
*/ | |
style &= ~SWT.BORDER; | |
/* | |
* Even though it is legal to create this widget | |
* with scroll bars, they serve no useful purpose | |
* because they do not automatically scroll the | |
* widget's client area. The fix is to clear | |
* the SWT style. | |
*/ | |
style &= ~(SWT.H_SCROLL | SWT.V_SCROLL); | |
style = checkBits (style, SWT.DROP_DOWN, SWT.SIMPLE, 0, 0, 0, 0); | |
if ((style & SWT.SIMPLE) != 0) return style & ~SWT.READ_ONLY; | |
return style; | |
} | |
protected void checkSubclass () { | |
if (!isValidSubclass ()) error (SWT.ERROR_INVALID_SUBCLASS); | |
} | |
/** | |
* 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(); | |
int xDisplay = OS.XtDisplay (handle); | |
if (xDisplay == 0) return; | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
OS.XmTextClearSelection (argList[1], OS.XtLastTimestampProcessed (xDisplay)); | |
} | |
public Point computeSize (int wHint, int hHint, boolean changed) { | |
checkWidget(); | |
int [] argList = { | |
OS.XmNlist, 0, | |
OS.XmNtextField, 0, | |
OS.XmNitemCount, 0, | |
OS.XmNmarginWidth, 0, | |
OS.XmNshadowThickness, 0, | |
OS.XmNhighlightThickness, 0, | |
OS.XmNarrowSize, 0, | |
OS.XmNarrowSpacing, 0, | |
}; | |
OS.XtGetValues(handle, argList, argList.length / 2); | |
XtWidgetGeometry result = new XtWidgetGeometry (); | |
result.request_mode = OS.CWWidth; | |
OS.XtQueryGeometry (argList[1], null, result); | |
int width = result.width, height = getTextHeight(); | |
int[] argList2 = {OS.XmNmarginWidth, 0, OS.XmNshadowThickness, 0}; | |
OS.XtGetValues(argList[3], argList2, argList2.length / 2); | |
if ((style & SWT.READ_ONLY) == 0) width += (2 * argList[7]); | |
if ((style & SWT.DROP_DOWN) != 0) { | |
width += argList[13] + argList[15]; | |
} else { | |
int itemCount = (argList[5] == 0) ? 5 : argList[5]; | |
height += (getItemHeight () * itemCount); | |
} | |
width += (2 * argList[9]) | |
+ (2 * argList[11]) | |
+ (2 * argList2[1]) | |
+ (2 * argList2[3]); | |
if (argList[5] == 0) width = DEFAULT_WIDTH; | |
if (hHint != SWT.DEFAULT) height = hHint; | |
if (wHint != SWT.DEFAULT) width = wHint; | |
Rectangle rect = computeTrim (0, 0, width, height); | |
return new Point (rect.width, rect.height); | |
} | |
void createHandle (int index) { | |
state |= HANDLE; | |
/* | |
* Feature in Motif. When items are added or removed | |
* from a combo, it may request and be granted, a new | |
* preferred size. This behavior is unwanted. The fix | |
* is to create a parent for the list that will disallow | |
* geometry requests. | |
*/ | |
int parentHandle = parent.handle; | |
int [] argList1 = {OS.XmNancestorSensitive, 1}; | |
formHandle = OS.XmCreateForm (parentHandle, null, argList1, argList1.length / 2); | |
if (formHandle == 0) error (SWT.ERROR_NO_HANDLES); | |
int comboBoxType = OS.XmDROP_DOWN_COMBO_BOX; | |
if ((style & SWT.SIMPLE) != 0) { | |
comboBoxType = OS.XmCOMBO_BOX; | |
} else if ((style & SWT.READ_ONLY) != 0) { | |
comboBoxType = OS.XmDROP_DOWN_LIST; | |
} | |
int [] argList2 = { | |
OS.XmNcomboBoxType, comboBoxType, | |
OS.XmNtopAttachment, OS.XmATTACH_FORM, | |
OS.XmNbottomAttachment, OS.XmATTACH_FORM, | |
OS.XmNleftAttachment, OS.XmATTACH_FORM, | |
OS.XmNrightAttachment, OS.XmATTACH_FORM, | |
OS.XmNresizable, 0, | |
}; | |
handle = OS.XmCreateComboBox (formHandle, null, argList2, argList2.length / 2); | |
if (handle == 0) error (SWT.ERROR_NO_HANDLES); | |
} | |
/** | |
* 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 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 (int index) { | |
checkWidget(); | |
if (index == -1) return; | |
int [] argList = {OS.XmNtextField, 0, OS.XmNlist, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
if (OS.XmListPosSelected (argList[3], index + 1)) { | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetString (argList[1], new byte[1]); | |
OS.XmTextSetInsertionPosition (argList[1], 0); | |
display.setWarnings (warnings); | |
OS.XmListDeselectAllItems (argList[3]); | |
} | |
} | |
/** | |
* Deselects all selected items in the receiver's list. | |
* <p> | |
* Note: To clear the selection in the receiver's text field, | |
* use <code>clearSelection()</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 #clearSelection | |
*/ | |
public void deselectAll () { | |
checkWidget(); | |
int [] argList = {OS.XmNtextField, 0, OS.XmNlist, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetString (argList[1], new byte[1]); | |
OS.XmTextSetInsertionPosition (argList[1], 0); | |
display.setWarnings(warnings); | |
OS.XmListDeselectAllItems (argList[3]); | |
} | |
/** | |
* 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> | |
* @exception SWTError <ul> | |
* <li>ERROR_CANNOT_GET_ITEM - if the operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public String getItem (int index) { | |
checkWidget(); | |
int [] argList = {OS.XmNitemCount, 0, OS.XmNitems, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
if (!(0 <= index && index < argList [1])) { | |
error (SWT.ERROR_INVALID_RANGE); | |
} | |
if (argList [3] == 0) error (SWT.ERROR_CANNOT_GET_ITEM); | |
int ptr = argList [3] + (index * 4); | |
int [] buffer1 = new int [1]; | |
OS.memmove (buffer1, ptr, 4); | |
ptr = buffer1 [0]; | |
int address = OS.XmStringUnparse ( | |
ptr, | |
null, | |
OS.XmCHARSET_TEXT, | |
OS.XmCHARSET_TEXT, | |
null, | |
0, | |
OS.XmOUTPUT_ALL); | |
if (address == 0) error (SWT.ERROR_CANNOT_GET_ITEM); | |
int length = OS.strlen (address); | |
byte [] buffer = new byte [length]; | |
OS.memmove (buffer, address, length); | |
OS.XtFree (address); | |
return decodeString(new String (Converter.mbcsToWcs (getCodePage (), buffer))); | |
} | |
/** | |
* 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> | |
* @exception SWTError <ul> | |
* <li>ERROR_CANNOT_GET_COUNT - if the operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public int getItemCount () { | |
checkWidget(); | |
int [] argList = {OS.XmNitemCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
return argList [1]; | |
} | |
/** | |
* 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> | |
* @exception SWTError <ul> | |
* <li>ERROR_CANNOT_GET_ITEM_HEIGHT - if the operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public int getItemHeight () { | |
checkWidget(); | |
int [] listHandleArgs = {OS.XmNlist, 0}; | |
OS.XtGetValues (handle, listHandleArgs, listHandleArgs.length / 2); | |
int [] argList = {OS.XmNlistSpacing, 0, OS.XmNhighlightThickness, 0}; | |
OS.XtGetValues (listHandleArgs[1], argList, argList.length / 2); | |
int spacing = argList [1], highlight = argList [3]; | |
/* Result is from empirical analysis on Linux and AIX */ | |
return getFontHeight () + spacing + (2 * highlight); | |
} | |
/** | |
* 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> | |
* @exception SWTError <ul> | |
* <li>ERROR_CANNOT_GET_ITEM - if the operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public String [] getItems () { | |
checkWidget(); | |
int [] argList = {OS.XmNitems, 0, OS.XmNitemCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int items = argList [1], itemCount = argList [3]; | |
int [] buffer1 = new int [1]; | |
String [] result = new String [itemCount]; | |
String codePage = getCodePage (); | |
for (int i = 0; i < itemCount; i++) { | |
OS.memmove (buffer1, items, 4); | |
int ptr = buffer1 [0]; | |
int address = OS.XmStringUnparse ( | |
ptr, | |
null, | |
OS.XmCHARSET_TEXT, | |
OS.XmCHARSET_TEXT, | |
null, | |
0, | |
OS.XmOUTPUT_ALL); | |
if (address == 0) error (SWT.ERROR_CANNOT_GET_ITEM); | |
int length = OS.strlen (address); | |
byte [] buffer = new byte [length]; | |
OS.memmove (buffer, address, length); | |
OS.XtFree (address); | |
result[i] = decodeString(new String (Converter.mbcsToWcs (codePage, buffer))); | |
items += 4; | |
} | |
return result; | |
} | |
/** | |
* 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(); | |
int [] start = new int [1], end = new int [1]; | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
OS.XmTextGetSelectionPosition (argList[1], start, end); | |
if (start [0] == end [0]) { | |
start [0] = end [0] = OS.XmTextGetInsertionPosition (argList[1]); | |
} | |
return new Point (start [0], end [0]); | |
} | |
/** | |
* 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(); | |
int [] argList = {OS.XmNlist, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int index = OS.XmListGetKbdItemPos (argList[1]); | |
if (OS.XmListPosSelected (argList[1], index)) return index - 1; | |
int [] count = new int [1], positions = new int [1]; | |
if (!OS.XmListGetSelectedPos (argList[1], positions, count)) return -1; | |
if (count [0] == 0) return -1; | |
int address = positions [0]; | |
int [] indices = new int [1]; | |
OS.memmove (indices, address, 4); | |
OS.XtFree (address); | |
return indices [0] - 1; | |
} | |
/** | |
* 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(); | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int ptr = OS.XmTextGetString (argList[1]); | |
if (ptr == 0) return ""; | |
int length = OS.strlen (ptr); | |
byte [] buffer = new byte [length]; | |
OS.memmove (buffer, ptr, length); | |
OS.XtFree (ptr); | |
return decodeString(new String (Converter.mbcsToWcs (getCodePage (), buffer))); | |
} | |
/** | |
* 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> | |
* @exception SWTError <ul> | |
* <li>ERROR_CANNOT_GET_ITEM_HEIGHT - if the operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public int getTextHeight () { | |
checkWidget(); | |
if ((style & SWT.DROP_DOWN) != 0) { | |
/* | |
* Bug in MOTIF. For some reason, XtQueryGeometry () | |
* returns the wrong height when the combo is not realized. | |
* The fix is to force the combo to be realized by forcing | |
* the shell to be realized. | |
*/ | |
if (!OS.XtIsRealized (handle)) getShell ().realizeWidget (); | |
XtWidgetGeometry result = new XtWidgetGeometry (); | |
result.request_mode = OS.CWHeight; | |
OS.XtQueryGeometry (handle, null, result); | |
return result.height; | |
} else { | |
/* Calculate text field height. */ | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int [] argList2 = {OS.XmNmarginHeight, 0}; | |
OS.XtGetValues (argList[1], argList2, argList2.length / 2); | |
int height = getFontHeight (); | |
XRectangle rect = new XRectangle (); | |
OS.XmWidgetGetDisplayRect (argList[1], rect); | |
height += (rect.y * 2) + (2 * argList2[1]); | |
/* Add in combo box margins. */ | |
int [] argList3 = {OS.XmNmarginHeight, 0, OS.XmNshadowThickness, 0, OS.XmNhighlightThickness, 0}; | |
OS.XtGetValues(handle, argList3, argList3.length / 2); | |
height += (2 * argList3[1]) + (2 * argList3[3]) + (2 * argList3[5]); | |
return height; | |
} | |
} | |
/** | |
* Returns the maximum number of characters that the receiver's | |
* text field is capable of holding. If this has not been changed | |
* by <code>setTextLimit()</code>, it will be the constant | |
* <code>Combo.LIMIT</code>. | |
* | |
* @return the text limit | |
* | |
* @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 getTextLimit () { | |
checkWidget(); | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
return OS.XmTextGetMaxLength (argList[1]); | |
} | |
void hookEvents () { | |
super.hookEvents (); | |
int windowProc = getDisplay ().windowProc; | |
OS.XtAddCallback (handle, OS.XmNselectionCallback, windowProc, SWT.Selection); | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
OS.XtAddCallback (argList[1], OS.XmNactivateCallback, windowProc, SWT.DefaultSelection); | |
OS.XtAddCallback (argList[1], OS.XmNvalueChangedCallback, windowProc, SWT.Modify); | |
} | |
/** | |
* 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) error (SWT.ERROR_NULL_ARGUMENT); | |
byte [] buffer = Converter.wcsToMbcs (getCodePage (), encodeString(string), true); | |
int xmString = OS.XmStringCreateLocalized (buffer); | |
if (xmString == 0) return -1; | |
int [] argList = {OS.XmNlist, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int index = OS.XmListItemPos (argList[1], xmString); | |
OS.XmStringFree (xmString); | |
return index - 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 | |
* @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) error (SWT.ERROR_NULL_ARGUMENT); | |
int [] argList = {OS.XmNitems, 0, OS.XmNitemCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int items = argList [1], itemCount = argList [3]; | |
if (!((0 <= start) && (start < itemCount))) return -1; | |
byte [] buffer1 = Converter.wcsToMbcs (getCodePage (), encodeString(string), true); | |
int xmString = OS.XmStringCreateLocalized (buffer1); | |
if (xmString == 0) return -1; | |
int index = start; | |
items += start * 4; | |
int [] buffer2 = new int [1]; | |
while (index < itemCount) { | |
OS.memmove (buffer2, items, 4); | |
if (OS.XmStringCompare (buffer2 [0], xmString)) break; | |
items += 4; index++; | |
} | |
OS.XmStringFree (xmString); | |
if (index == itemCount) return -1; | |
return index; | |
} | |
int processSelection (int callData) { | |
/* | |
* Bug in MOTIF. If items have been added and removed from a | |
* combo then users are able to select an empty drop-down item | |
* in the combo once and force a resulting callback. In such | |
* cases we want to eat this callback so that listeners are not | |
* notified. | |
*/ | |
if (ignoreSelect || getSelectionIndex() == -1) | |
return 0; | |
return super.processSelection(callData); | |
} | |
/** | |
* Removes the item from the receiver's list at the given | |
* zero-relative index. | |
* | |
* @param index the index for the item | |
* | |
* @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> | |
* @exception SWTError <ul> | |
* <li>ERROR_ITEM_NOT_REMOVED - if the operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public void remove (int index) { | |
checkWidget(); | |
if (index == -1) error (SWT.ERROR_INVALID_RANGE); | |
/* | |
* Feature in Motif. An index out of range handled | |
* correctly by the list widget but causes an unwanted | |
* Xm Warning. The fix is to check the range before | |
* deleting an item. | |
*/ | |
int [] argList = {OS.XmNitemCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
if (!(0 <= index && index < argList [1])) { | |
error (SWT.ERROR_INVALID_RANGE); | |
} | |
OS.XmComboBoxDeletePos (handle, index + 1); | |
} | |
/** | |
* Removes the items from the receiver's list which are | |
* between the given zero-relative start and end | |
* indices (inclusive). | |
* | |
* @param start the start of the range | |
* @param end the end of the range | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_INVALID_RANGE - if either the start or end are 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> | |
* @exception SWTError <ul> | |
* <li>ERROR_ITEM_NOT_REMOVED - if the operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public void remove (int start, int end) { | |
checkWidget(); | |
if (start > end) return; | |
/* | |
* Feature in Motif. An index out of range handled | |
* correctly by the list widget but causes an unwanted | |
* Xm Warning. The fix is to check the range before | |
* deleting an item. | |
*/ | |
int [] argList = {OS.XmNitemCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
if (!(0 <= start && start < argList [1])) { | |
error (SWT.ERROR_INVALID_RANGE); | |
} | |
int newEnd = Math.min (end, argList [1] - 1); | |
for (int i = start; i <= newEnd; i++) { | |
OS.XmComboBoxDeletePos (handle, start + 1); | |
} | |
if (end >= argList [1]) error (SWT.ERROR_INVALID_RANGE); | |
} | |
void register () { | |
super.register (); | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
WidgetTable.put(argList[1], this); | |
} | |
/** | |
* 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 string the item to remove | |
* | |
* @exception IllegalArgumentException <ul> | |
* <li>ERROR_NULL_ARGUMENT - if the string is null</li> | |
* <li>ERROR_INVALID_ARGUMENT - if the string is not found in the list</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> | |
* @exception SWTError <ul> | |
* <li>ERROR_ITEM_NOT_REMOVED - if the operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public void remove (String string) { | |
checkWidget(); | |
if (string == null) error (SWT.ERROR_NULL_ARGUMENT); | |
byte [] buffer = Converter.wcsToMbcs (getCodePage (), encodeString(string), true); | |
int xmString = OS.XmStringCreateLocalized (buffer); | |
if (xmString == 0) error (SWT.ERROR_ITEM_NOT_REMOVED); | |
int [] argList = {OS.XmNlist, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int index = OS.XmListItemPos (argList[1], xmString); | |
OS.XmStringFree (xmString); | |
if (index == 0) error (SWT.ERROR_INVALID_ARGUMENT); | |
OS.XmComboBoxDeletePos (handle, index); | |
} | |
/** | |
* Removes all of the items from the receiver's list. | |
* <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> | |
*/ | |
public void removeAll () { | |
checkWidget(); | |
int [] argList = {OS.XmNtextField, 0, OS.XmNlist, 0, OS.XmNitemCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetString (argList[1], new byte[1]); | |
OS.XmTextSetInsertionPosition (argList[1], 0); | |
display.setWarnings(warnings); | |
OS.XmListDeselectAllItems (argList[3]); | |
for (int i = 0; i < argList[5]; i++) { | |
OS.XmComboBoxDeletePos(handle, 1); | |
} | |
} | |
/** | |
* 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) error (SWT.ERROR_NULL_ARGUMENT); | |
if (eventTable == null) return; | |
eventTable.unhook (SWT.Modify, listener); | |
} | |
/** | |
* Removes the listener from the collection of listeners who will | |
* be notified when the receiver's selection changes. | |
* | |
* @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) error (SWT.ERROR_NULL_ARGUMENT); | |
if (eventTable == null) return; | |
eventTable.unhook (SWT.Selection, listener); | |
eventTable.unhook (SWT.DefaultSelection,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(); | |
if (index == -1) { | |
int [] argList = {OS.XmNtextField, 0, OS.XmNlist, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetString (argList[1], new byte[1]); | |
OS.XmTextSetInsertionPosition (argList[1], 0); | |
display.setWarnings (warnings); | |
OS.XmListDeselectAllItems (argList[3]); | |
} else { | |
int [] argList = {OS.XmNitemCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
if (!(0 <= index && index < argList [1])) return; | |
int [] argList2 = {OS.XmNselectedPosition, index}; | |
ignoreSelect = true; | |
OS.XtSetValues(handle, argList2, argList2.length / 2); | |
ignoreSelect = false; | |
} | |
} | |
/** | |
* Sets the widget bounds. | |
*/ | |
public void setBounds (int x, int y, int width, int height) { | |
checkWidget(); | |
int newHeight = ((style & SWT.DROP_DOWN) != 0) ? getTextHeight() : height; | |
super.setBounds (x, y, width, newHeight); | |
} | |
/** | |
* Sets the text of the item in the receiver's list at the given | |
* zero-relative index to the string argument. This is equivalent | |
* to <code>remove</code>'ing the old item at the index, and then | |
* <code>add</code>'ing the new item at that index. | |
* | |
* @param index the index for the item | |
* @param string the new text for the item | |
* | |
* @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> | |
* @exception SWTError <ul> | |
* <li>ERROR_ITEM_NOT_REMOVED - if the remove operation fails because of an operating system failure</li> | |
* <li>ERROR_ITEM_NOT_ADDED - if the add operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public void setItem (int index, String string) { | |
checkWidget(); | |
if (string == null) error (SWT.ERROR_NULL_ARGUMENT); | |
if (index == -1) error (SWT.ERROR_INVALID_RANGE); | |
int [] argList = {OS.XmNlist, 0, OS.XmNitemCount, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
if (!(0 <= index && index < argList [3])) { | |
error (SWT.ERROR_INVALID_RANGE); | |
} | |
byte [] buffer = Converter.wcsToMbcs (getCodePage (), encodeString(string), true); | |
int xmString = OS.XmStringCreateLocalized (buffer); | |
if (xmString == 0) error (SWT.ERROR_ITEM_NOT_ADDED); | |
boolean isSelected = OS.XmListPosSelected (argList[1], index + 1); | |
OS.XmListReplaceItemsPosUnselected (argList[1], new int [] {xmString}, 1, index + 1); | |
if (isSelected) OS.XmListSelectPos (argList[1], index + 1, false); | |
OS.XmStringFree (xmString); | |
} | |
/** | |
* Sets the receiver's list to be the given array of items. | |
* | |
* @param items the array 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> | |
* @exception SWTError <ul> | |
* <li>ERROR_ITEM_NOT_ADDED - if the operation fails because of an operating system failure</li> | |
* </ul> | |
*/ | |
public void setItems (String [] items) { | |
checkWidget(); | |
if (items == null) error (SWT.ERROR_NULL_ARGUMENT); | |
if (items.length == 0) { | |
removeAll(); | |
return; | |
} | |
int index = 0; | |
int [] table = new int [items.length]; | |
String codePage = getCodePage (); | |
while (index < items.length) { | |
String string = items [index]; | |
if (string == null) break; | |
byte [] buffer = Converter.wcsToMbcs (codePage, encodeString(string), true); | |
int xmString = OS.XmStringCreateLocalized (buffer); | |
if (xmString == 0) break; | |
table [index++] = xmString; | |
} | |
int ptr = OS.XtMalloc (index * 4); | |
OS.memmove (ptr, table, index * 4); | |
int [] argList = {OS.XmNitems, ptr, OS.XmNitemCount, index}; | |
OS.XtSetValues (handle, argList, argList.length / 2); | |
for (int i=0; i<index; i++) OS.XmStringFree (table [i]); | |
OS.XtFree (ptr); | |
if (index < items.length) error (SWT.ERROR_ITEM_NOT_ADDED); | |
} | |
/** | |
* 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 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(); | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
/* Clear the highlight before setting the selection. */ | |
int position = OS.XmTextGetLastPosition (argList[1]); | |
/* | |
* Bug in MOTIF. XmTextSetSelection () fails to set the | |
* selection when the receiver is not realized. The fix | |
* is to force the receiver to be realized by forcing the | |
* shell to be realized. If the receiver is realized before | |
* the shell, MOTIF fails to draw the text widget and issues | |
* lots of X BadDrawable errors. | |
*/ | |
if (!OS.XtIsRealized (handle)) getShell ().realizeWidget (); | |
/* Set the selection. */ | |
int xDisplay = OS.XtDisplay (argList[1]); | |
if (xDisplay == 0) return; | |
int nStart = Math.min (Math.max (Math.min (selection.x, selection.y), 0), position); | |
int nEnd = Math.min (Math.max (Math.max (selection.x, selection.y), 0), position); | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetSelection (argList[1], nStart, nEnd, OS.XtLastTimestampProcessed (xDisplay)); | |
/* Force the i-beam to follow the highlight/selection. */ | |
OS.XmTextSetInsertionPosition (argList[1], nEnd); | |
display.setWarnings(warnings); | |
} | |
/** | |
* Sets the widget size. | |
*/ | |
public void setSize (int width, int height) { | |
checkWidget(); | |
int newHeight = ((style & SWT.DROP_DOWN) != 0) ? getTextHeight () : height; | |
super.setSize (width, newHeight); | |
} | |
/** | |
* 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 text 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) error (SWT.ERROR_NULL_ARGUMENT); | |
/* | |
* The read-only and non-read-only cases must be handled | |
* separately here because the platform will allow the | |
* text of a read-only combo to be set to any value, | |
* regardless of whether it appears in the combo's item | |
* list or not. | |
*/ | |
if ((style & SWT.READ_ONLY) != 0) { | |
int index = indexOf (string); | |
if (index != -1) select (index); | |
} else { | |
byte [] buffer = Converter.wcsToMbcs (getCodePage (), string, true); | |
int xmString = OS.XmStringCreateLocalized (buffer); | |
if (xmString == 0) return; | |
int [] argList = {OS.XmNtextField, 0, OS.XmNlist, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
int index = OS.XmListItemPos (argList[3], xmString); | |
if (index > 0) { | |
/* The list contains the item. */ | |
OS.XmComboBoxSelectItem(handle, xmString); | |
} else { | |
/* The list does not contain the item. */ | |
Display display = getDisplay (); | |
boolean warnings = display.getWarnings (); | |
display.setWarnings (false); | |
OS.XmTextSetString (argList[1], buffer); | |
OS.XmTextSetInsertionPosition (argList[1], 0); | |
display.setWarnings(warnings); | |
} | |
OS.XmStringFree (xmString); | |
/* | |
* Bug in Linux. When the widget is multi-line | |
* it does not send a Modify to notify the application | |
* that the text has changed. The fix is to send the event. | |
*/ | |
if (OS.IsLinux && (style & SWT.MULTI) != 0) sendEvent (SWT.Modify); | |
} | |
} | |
/** | |
* 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(); | |
if (limit == 0) error (SWT.ERROR_CANNOT_BE_ZERO); | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
OS.XmTextSetMaxLength (argList[1], limit); | |
} | |
void deregister () { | |
super.deregister (); | |
int [] argList = {OS.XmNtextField, 0}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
WidgetTable.remove (argList[1]); | |
} | |
void enableWidget (boolean enabled) { | |
super.enableWidget (enabled); | |
int [] argList = { | |
OS.XmNlist, 0, | |
OS.XmNtextField, 0, | |
}; | |
OS.XtGetValues (handle, argList, argList.length / 2); | |
enableHandle (enabled, argList [1]); | |
enableHandle (enabled, argList [3]); | |
} | |
/** | |
* Bug in Motif. | |
* Empty strings in the combo will cause GPFs if a) they | |
* are the only items in the combo or b) if they are | |
* included in an array which is set as the value of the | |
* combo's items resource. To protect against these GPFs, | |
* make sure that no empty strings are added to the combo. | |
* The solution is to add a space to empty strings or | |
* strings which are all spaces. This space is removed | |
* when answering the text of items which are all spaces. | |
*/ | |
String encodeString(String string) { | |
for (int i = 0; i < string.length(); i++) { | |
if (string.charAt(i) != ' ') { | |
return string; | |
} | |
} | |
return string + ' '; | |
} | |
/** | |
* Bug in Motif. | |
* Empty strings in the combo will cause GPFs if a) they | |
* are the only items in the combo or b) if they are | |
* included in an array which is set as the value of the | |
* combo's items resource. To protect against these GPFs, | |
* make sure that no empty strings are added to the combo. | |
* The solution is to add a space to empty strings or | |
* strings which include only spaces. A space is removed | |
* when answering the text of items which are all spaces. | |
*/ | |
String decodeString(String string) { | |
if (string.length() == 0) return string; | |
for (int i = 0; i < string.length(); i++) { | |
if (string.charAt(i) != ' ') { | |
return string; | |
} | |
} | |
return string.substring(0, string.length() - 1); | |
} | |
} |