| /******************************************************************************* |
| * Copyright (c) 2000, 2009 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.widgets; |
| |
| |
| 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 represent a selectable user interface object that |
| * issues notification when pressed and released. |
| * <dl> |
| * <dt><b>Styles:</b></dt> |
| * <dd>ARROW, CHECK, PUSH, RADIO, TOGGLE, FLAT</dd> |
| * <dd>UP, DOWN, LEFT, RIGHT, CENTER</dd> |
| * <dt><b>Events:</b></dt> |
| * <dd>Selection</dd> |
| * </dl> |
| * <p> |
| * Note: Only one of the styles ARROW, CHECK, PUSH, RADIO, and TOGGLE |
| * may be specified. |
| * </p><p> |
| * Note: Only one of the styles LEFT, RIGHT, and CENTER may be specified. |
| * </p><p> |
| * Note: Only one of the styles UP, DOWN, LEFT, and RIGHT may be specified |
| * when the ARROW style is specified. |
| * </p><p> |
| * IMPORTANT: This class is intended to be subclassed <em>only</em> |
| * within the SWT implementation. |
| * </p> |
| * |
| * @see <a href="http://www.eclipse.org/swt/snippets/#button">Button snippets</a> |
| * @see <a href="http://www.eclipse.org/swt/examples.php">SWT Example: ControlExample</a> |
| * @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a> |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class Button extends Control { |
| String text = ""; |
| Image image, bitmap, disabled; |
| boolean grayed; |
| static final byte [] ARM_AND_ACTIVATE; |
| static { |
| String name = "ArmAndActivate"; |
| int length = name.length(); |
| char [] unicode = new char [length]; |
| name.getChars (0, length, unicode, 0); |
| byte [] buffer = new byte [length + 1]; |
| for (int i = 0; i < length; i++) { |
| buffer[i] = (byte) unicode[i]; |
| } |
| ARM_AND_ACTIVATE = buffer; |
| } |
| /** |
| * 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 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#ARROW |
| * @see SWT#CHECK |
| * @see SWT#PUSH |
| * @see SWT#RADIO |
| * @see SWT#TOGGLE |
| * @see SWT#FLAT |
| * @see SWT#UP |
| * @see SWT#DOWN |
| * @see SWT#LEFT |
| * @see SWT#RIGHT |
| * @see SWT#CENTER |
| * @see Widget#checkSubclass |
| * @see Widget#getStyle |
| */ |
| public Button (Composite parent, int style) { |
| super (parent, checkStyle (style)); |
| } |
| void _setImage (Image image) { |
| int labelPixmap = OS.XmUNSPECIFIED_PIXMAP; |
| int labelInsensitivePixmap = OS.XmUNSPECIFIED_PIXMAP; |
| if (bitmap != null) bitmap.dispose (); |
| if (disabled != null) disabled.dispose (); |
| bitmap = disabled = null; |
| if (image != null) { |
| if (image.isDisposed()) error(SWT.ERROR_INVALID_ARGUMENT); |
| switch (image.type) { |
| case SWT.BITMAP: |
| ImageData data; |
| if (image.mask == 0 && (data = image.getImageData ()).alpha == -1 && data.alphaData == null && data.transparentPixel == -1) { |
| labelPixmap = image.pixmap; |
| disabled = new Image (display, image, SWT.IMAGE_DISABLE); |
| labelInsensitivePixmap = disabled.pixmap; |
| break; |
| } |
| //FALL THROUGH |
| case SWT.ICON: |
| Rectangle rect = image.getBounds (); |
| bitmap = new Image (display, rect.width, rect.height); |
| GC gc = new GC (bitmap); |
| gc.setBackground (getBackground ()); |
| gc.fillRectangle (rect); |
| gc.drawImage (image, 0, 0); |
| gc.dispose (); |
| labelPixmap = bitmap.pixmap; |
| disabled = new Image (display, bitmap, SWT.IMAGE_DISABLE); |
| labelInsensitivePixmap = disabled.pixmap; |
| break; |
| default: |
| error (SWT.ERROR_NOT_IMPLEMENTED); |
| } |
| } |
| int [] argList = { |
| OS.XmNlabelType, image == null ? OS.XmSTRING : OS.XmPIXMAP, |
| OS.XmNlabelPixmap, labelPixmap, |
| OS.XmNlabelInsensitivePixmap, labelInsensitivePixmap, |
| }; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| void _setText (String string) { |
| /* Strip out mnemonic marker symbols, and remember the mnemonic. */ |
| char [] unicode = new char [string.length ()]; |
| string.getChars (0, unicode.length, unicode, 0); |
| int mnemonic = fixMnemonic (unicode); |
| |
| /* Wrap the text if necessary, and convert to mbcs. */ |
| byte [] buffer = null; |
| if ((style & SWT.WRAP) != 0) { |
| int [] argList = { |
| OS.XmNwidth, 0, /* 1 */ |
| OS.XmNmarginWidth, 0, /* 3 */ |
| OS.XmNmarginLeft, 0, /* 5 */ |
| OS.XmNmarginRight, 0, /* 7 */ |
| OS.XmNspacing, 0, /* 9 */ |
| OS.XmNdefaultButtonShadowThickness, 0, /* 11 */ |
| }; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int width = argList [1] - argList [3] * 2 - argList[5] - argList[7] - argList[9] - argList[11] * 2; |
| if (mnemonic != 0) string = new String (unicode); |
| string = display.wrapText (string, font, width); |
| buffer = Converter.wcsToMbcs (getCodePage (), string, true); |
| } else { |
| buffer = Converter.wcsToMbcs (getCodePage (), unicode, true); |
| } |
| |
| int xmString = OS.XmStringGenerate(buffer, null, OS.XmCHARSET_TEXT, null); |
| if (xmString == 0) error (SWT.ERROR_CANNOT_SET_TEXT); |
| |
| /* |
| * Bug in Solaris. If a mnemonic is defined to be a character |
| * that appears in a string in a position that follows a '\n', |
| * Solaris segment faults. For example, a label with text |
| * "Hello\nthe&re" would GP since "r" appears after '\n'. |
| * |
| * The fix is to remove mnemonics from labels that contain |
| * '\n', which is fine since such labels generally just act |
| * as descriptive texts anyways. |
| */ |
| if (mnemonic == 0 || string.indexOf ('\n') != -1) { |
| mnemonic = OS.XK_VoidSymbol; |
| } |
| int [] argList = { |
| OS.XmNlabelType, OS.XmSTRING, |
| OS.XmNlabelString, xmString, |
| OS.XmNmnemonic, mnemonic, |
| }; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| if (xmString != 0) OS.XmStringFree (xmString); |
| } |
| /** |
| * Adds the listener to the collection of listeners who will |
| * be notified when the control is selected by the user, by sending |
| * it one of the messages defined in the <code>SelectionListener</code> |
| * interface. |
| * <p> |
| * <code>widgetSelected</code> is called when the control is selected by the user. |
| * <code>widgetDefaultSelected</code> is not called. |
| * </p> |
| * <p> |
| * When the <code>SWT.RADIO</code> style bit is set, the <code>widgetSelected</code> method is |
| * also called when the receiver loses selection because another item in the same radio group |
| * was selected by the user. During <code>widgetSelected</code> the application can use |
| * <code>getSelection()</code> to determine the current selected state of the receiver. |
| * </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) { |
| style = checkBits (style, SWT.PUSH, SWT.ARROW, SWT.CHECK, SWT.RADIO, SWT.TOGGLE, 0); |
| if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0) { |
| return checkBits (style, SWT.CENTER, SWT.LEFT, SWT.RIGHT, 0, 0, 0); |
| } |
| if ((style & (SWT.CHECK | SWT.RADIO)) != 0) { |
| return checkBits (style, SWT.LEFT, SWT.RIGHT, SWT.CENTER, 0, 0, 0); |
| } |
| if ((style & SWT.ARROW) != 0) { |
| style |= SWT.NO_FOCUS; |
| return checkBits (style, SWT.UP, SWT.DOWN, SWT.LEFT, SWT.RIGHT, 0, 0); |
| } |
| return style; |
| } |
| void click () { |
| int event = OS.XtMalloc (XEvent.sizeof); |
| OS.XtCallActionProc (handle, ARM_AND_ACTIVATE, event, null, 0); |
| OS.XtFree (event); |
| } |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| int border = getBorderWidth (); |
| int width = border * 2, height = border * 2; |
| if ((style & SWT.ARROW) != 0) { |
| width += display.scrolledMarginX; |
| height += display.scrolledMarginY; |
| if (wHint != SWT.DEFAULT) width = wHint + (border * 2); |
| if (hHint != SWT.DEFAULT) height = hHint + (border * 2); |
| return new Point (width, height); |
| } |
| int [] argList = {OS.XmNlabelType, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int labelType = argList [1]; |
| if (labelType == OS.XmSTRING && (style & SWT.WRAP) != 0) { |
| /* If we are wrapping text, calculate the height based on wHint. */ |
| int [] argList2 = { |
| OS.XmNmarginTop, 0, /* 1 */ |
| OS.XmNmarginBottom, 0, /* 3 */ |
| OS.XmNmarginHeight, 0, /* 5 */ |
| OS.XmNmarginWidth, 0, /* 7 */ |
| OS.XmNmarginLeft, 0, /* 9 */ |
| OS.XmNmarginRight, 0, /* 11 */ |
| OS.XmNspacing, 0, /* 13 */ |
| OS.XmNdefaultButtonShadowThickness, 0, /* 15 */ |
| }; |
| OS.XtGetValues (handle, argList2, argList2.length / 2); |
| int trimWidth = (argList2 [7] * 2) + argList2 [9] + argList2 [11] + argList2 [13] + 2 * border + 2 * argList2[15]; |
| String string = text; |
| if (wHint != SWT.DEFAULT) { |
| string = display.wrapText (string, font, wHint - trimWidth); |
| } |
| GC gc = new GC (this); |
| Point extent = gc.textExtent (string); |
| gc.dispose (); |
| height = extent.y + argList2 [1] + argList2 [3] + (argList2 [5] * 2) + (border * 2); |
| if (wHint == SWT.DEFAULT) { |
| width = extent.x + trimWidth; |
| } |
| } else { |
| XtWidgetGeometry result = new XtWidgetGeometry (); |
| result.request_mode = OS.CWWidth | OS.CWHeight; |
| int [] argList2 = {OS.XmNrecomputeSize, 1}; |
| OS.XtSetValues(handle, argList2, argList2.length / 2); |
| OS.XtQueryGeometry (handle, null, result); |
| int [] argList3 = {OS.XmNrecomputeSize, 0}; |
| OS.XtSetValues(handle, argList3, argList3.length / 2); |
| width += result.width; |
| height += result.height; |
| } |
| /* |
| * Feature in Motif. If a button's labelType is XmSTRING but it |
| * has no label set into it yet, recomputing the size will |
| * not take into account the height of the font, as we would |
| * like it to. Take care of this case. |
| */ |
| if (labelType == OS.XmSTRING) { |
| int [] argList1 = {OS.XmNlabelString, 0}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| int xmString = argList1 [1]; |
| if (xmString != 0) { |
| if (OS.XmStringEmpty (xmString)) { |
| int xmString2 = OS.XmStringCreateLocalized (new byte[]{' ', '\0'}); |
| if (xmString2 != 0) { |
| height += OS.XmStringHeight (font.handle, xmString2); |
| OS.XmStringFree(xmString2); |
| } |
| } |
| OS.XmStringFree (xmString); |
| } |
| } |
| if (wHint != SWT.DEFAULT || hHint != SWT.DEFAULT) { |
| int [] argList4 = new int [] { |
| OS.XmNmarginLeft, 0, |
| OS.XmNmarginRight, 0, |
| OS.XmNmarginTop, 0, |
| OS.XmNmarginBottom, 0, |
| }; |
| OS.XtGetValues (handle, argList4, argList4.length / 2); |
| if (wHint != SWT.DEFAULT) width = wHint + argList4 [1] + argList4 [3] + (border * 2); |
| if (hHint != SWT.DEFAULT) height = hHint + argList4 [5] + argList4 [7] + (border * 2); |
| } |
| return new Point (width, height); |
| } |
| void createHandle (int index) { |
| if ((style & SWT.PUSH) == 0) state |= THEME_BACKGROUND; |
| int borderWidth = (style & SWT.BORDER) != 0 ? 1 : 0; |
| int parentHandle = parent.handle; |
| |
| /* ARROW button */ |
| if ((style & SWT.ARROW) != 0) { |
| int alignment = OS.XmARROW_UP; |
| if ((style & SWT.UP) != 0) alignment = OS.XmARROW_UP; |
| if ((style & SWT.DOWN) != 0) alignment = OS.XmARROW_DOWN; |
| if ((style & SWT.LEFT) != 0) alignment = OS.XmARROW_LEFT; |
| if ((style & SWT.RIGHT) != 0) alignment = OS.XmARROW_RIGHT; |
| int [] argList = { |
| OS.XmNtraversalOn, 0, |
| OS.XmNarrowDirection, alignment, |
| OS.XmNborderWidth, borderWidth, |
| OS.XmNancestorSensitive, 1, |
| }; |
| handle = OS.XmCreateArrowButton (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| if ((style & SWT.FLAT) != 0) { |
| int [] argList1 = {OS.XmNbottomShadowColor, 0}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| int [] argList2 = { |
| OS.XmNshadowThickness, 1, |
| OS.XmNtopShadowColor, argList1 [1], |
| }; |
| OS.XtSetValues (handle, argList2, argList2.length / 2); |
| } |
| return; |
| } |
| |
| /* Compute alignment */ |
| int alignment = OS.XmALIGNMENT_BEGINNING; |
| if ((style & SWT.CENTER) != 0) alignment = OS.XmALIGNMENT_CENTER; |
| if ((style & SWT.RIGHT) != 0) alignment = OS.XmALIGNMENT_END; |
| |
| /* TOGGLE button */ |
| if ((style & SWT.TOGGLE) != 0) { |
| /* |
| * Bug in Motif. When XmNindicatorOn is set to false, |
| * Motif doesn't reset the shadow thickness to give a |
| * push button look. The fix is to set the shadow |
| * thickness when ever this resource is changed. |
| */ |
| int thickness = display.buttonShadowThickness; |
| int [] argList = { |
| OS.XmNancestorSensitive, 1, |
| OS.XmNrecomputeSize, 0, |
| OS.XmNindicatorOn, 0, |
| OS.XmNshadowThickness, (style & SWT.FLAT) != 0 ? 1 : thickness, |
| OS.XmNalignment, alignment, |
| OS.XmNborderWidth, borderWidth, |
| }; |
| handle = OS.XmCreateToggleButton (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| if ((style & SWT.FLAT) != 0) { |
| int [] argList1 = {OS.XmNbottomShadowColor, 0}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| int [] argList2 = {OS.XmNtopShadowColor, argList1 [1]}; |
| OS.XtSetValues (handle, argList2, argList2.length / 2); |
| } |
| return; |
| } |
| |
| /* CHECK or RADIO button */ |
| if ((style & (SWT.CHECK | SWT.RADIO)) != 0) { |
| /* |
| * Bug in Motif. For some reason, a toggle button |
| * with XmNindicatorType XmONE_OF_MANY must have this |
| * value set at creation or the highlight color will |
| * not be correct. The fix is to set these values |
| * on create. |
| */ |
| int indicatorType = OS.XmONE_OF_MANY; |
| if ((style & SWT.CHECK) != 0) indicatorType = OS.XmN_OF_MANY; |
| int [] argList = { |
| OS.XmNancestorSensitive, 1, |
| OS.XmNrecomputeSize, 0, |
| OS.XmNindicatorType, indicatorType, |
| OS.XmNalignment, alignment, |
| OS.XmNborderWidth, borderWidth, |
| }; |
| handle = OS.XmCreateToggleButton (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| return; |
| } |
| |
| /* PUSH button */ |
| int [] argList = { |
| OS.XmNancestorSensitive, 1, |
| OS.XmNrecomputeSize, 0, |
| OS.XmNalignment, alignment, |
| OS.XmNborderWidth, borderWidth, |
| /* |
| * This code is intentionally commented. On some |
| * platforms, the standard behavior is that push |
| * buttons are tab groups, traversed with the tab |
| * key. On Motif, push buttons are tab items, |
| * that are traversed with the arrow keys. This |
| * behavior is unspecifed so the line remains |
| * commented. |
| */ |
| // OS.XmNnavigationType, OS.XmTAB_GROUP, |
| }; |
| handle = OS.XmCreatePushButton (parentHandle, null, argList, argList.length / 2); |
| if (handle == 0) error (SWT.ERROR_NO_HANDLES); |
| if ((style & SWT.FLAT) != 0) { |
| int [] argList1 = {OS.XmNbottomShadowColor, 0}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| int [] argList2 = { |
| OS.XmNshadowThickness, 1, |
| OS.XmNtopShadowColor, argList1 [1], |
| }; |
| OS.XtSetValues (handle, argList2, argList2.length / 2); |
| } |
| } |
| void createWidget (int index) { |
| super.createWidget (index); |
| if ((style & SWT.PUSH) == 0) return; |
| if (getShell ().parent == null) return; |
| int [] argList = new int [] {OS.XmNdefaultButtonShadowThickness, 1}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| int defaultBackground () { |
| return display.buttonBackground; |
| } |
| Font defaultFont () { |
| return display.buttonFont; |
| } |
| int defaultForeground () { |
| return display.buttonForeground; |
| } |
| /** |
| * Returns a value which describes the position of the |
| * text or image in the receiver. The value will be one of |
| * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code> |
| * unless the receiver is an <code>ARROW</code> button, in |
| * which case, the alignment will indicate the direction of |
| * the arrow (one of <code>LEFT</code>, <code>RIGHT</code>, |
| * <code>UP</code> or <code>DOWN</code>). |
| * |
| * @return the alignment |
| * |
| * @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 getAlignment () { |
| checkWidget(); |
| if ((style & SWT.ARROW) != 0) { |
| int [] argList = {OS.XmNarrowDirection, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int direction = argList [1]; |
| if (direction == OS.XmARROW_UP) return SWT.UP; |
| if (direction == OS.XmARROW_DOWN) return SWT.DOWN; |
| if (direction == OS.XmARROW_LEFT) return SWT.LEFT; |
| if (direction == OS.XmARROW_RIGHT) return SWT.RIGHT; |
| return SWT.UP; |
| } |
| int [] argList = {OS.XmNalignment, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| int alignment = argList [1]; |
| if (alignment == OS.XmALIGNMENT_BEGINNING) return SWT.LEFT; |
| if (alignment == OS.XmALIGNMENT_CENTER) return SWT.CENTER; |
| if (alignment == OS.XmALIGNMENT_END)return SWT.RIGHT; |
| return SWT.CENTER; |
| } |
| boolean getDefault () { |
| if ((style & SWT.PUSH) == 0) return false; |
| // int [] argList = {OS.XmNshowAsDefault, 0}; |
| // OS.XtGetValues (handle, argList, argList.length / 2); |
| // return argList [1] != 0; |
| return this == menuShell ().defaultButton; |
| } |
| /** |
| * Returns <code>true</code> if the receiver is grayed, |
| * and false otherwise. When the widget does not have |
| * the <code>CHECK</code> style, return false. |
| * |
| * @return the grayed state of the checkbox |
| * |
| * @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 boolean getGrayed () { |
| checkWidget(); |
| if ((style & SWT.CHECK) == 0) return false; |
| return grayed; |
| } |
| /** |
| * Returns the receiver's image if it has one, or null |
| * if it does not. |
| * |
| * @return the receiver's image |
| * |
| * @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 Image getImage () { |
| checkWidget(); |
| return image; |
| } |
| String getNameText () { |
| return getText (); |
| } |
| /** |
| * Returns <code>true</code> if the receiver is selected, |
| * and false otherwise. |
| * <p> |
| * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>, |
| * it is selected when it is checked. When it is of type <code>TOGGLE</code>, |
| * it is selected when it is pushed in. If the receiver is of any other type, |
| * this method returns false. |
| * |
| * @return the selection 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 boolean getSelection () { |
| checkWidget(); |
| if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) == 0) return false; |
| int [] argList = {OS.XmNset, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| return argList [1] != OS.XmUNSET; |
| } |
| /** |
| * Returns the receiver's text, which will be an empty |
| * string if it has never been set or if the receiver is |
| * an <code>ARROW</code> button. |
| * |
| * @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(); |
| if ((style & SWT.ARROW) != 0) return ""; |
| return text; |
| } |
| void hookEvents () { |
| super.hookEvents (); |
| int windowProc = display.windowProc; |
| if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) != 0) { |
| OS.XtAddCallback (handle, OS.XmNvalueChangedCallback, windowProc, VALUE_CHANGED_CALLBACK); |
| } else { |
| OS.XtAddCallback (handle, OS.XmNactivateCallback, windowProc, ACTIVATE_CALLBACK); |
| } |
| |
| } |
| boolean mnemonicHit (char key) { |
| if (!setFocus ()) return false; |
| click (); |
| return true; |
| } |
| boolean mnemonicMatch (char key) { |
| char mnemonic = findMnemonic (getText ()); |
| if (mnemonic == '\0') return false; |
| return Character.toUpperCase (key) == Character.toUpperCase (mnemonic); |
| } |
| void releaseWidget () { |
| super.releaseWidget (); |
| int [] argList = { |
| OS.XmNlabelPixmap, OS.XmUNSPECIFIED_PIXMAP, |
| OS.XmNlabelInsensitivePixmap, OS.XmUNSPECIFIED_PIXMAP, |
| }; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| if (bitmap != null) bitmap.dispose (); |
| if (disabled != null) disabled.dispose (); |
| image = bitmap = disabled = null; |
| } |
| /** |
| * Removes the listener from the collection of listeners who will |
| * be notified when the control is selected by the user. |
| * |
| * @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); |
| } |
| void selectRadio () { |
| /* |
| * This code is intentionally commented. When two groups |
| * of radio buttons with the same parent are separated by |
| * another control, the correct behavior should be that |
| * the two groups act independently. This is consistent |
| * with radio tool and menu items. The commented code |
| * implements this behavior. |
| */ |
| // int index = 0; |
| // Control [] children = parent._getChildren (); |
| // while (index < children.length && children [index] != this) index++; |
| // int i = index - 1; |
| // while (i >= 0 && children [i].setRadioSelection (false)) --i; |
| // int j = index + 1; |
| // while (j < children.length && children [j].setRadioSelection (false)) j++; |
| // setSelection (true); |
| Control [] children = parent._getChildren (); |
| for (int i=0; i<children.length; i++) { |
| Control child = children [i]; |
| if (this != child) child.setRadioSelection (false); |
| } |
| setSelection (true); |
| } |
| /** |
| * Controls how text, images and arrows will be displayed |
| * in the receiver. The argument should be one of |
| * <code>LEFT</code>, <code>RIGHT</code> or <code>CENTER</code> |
| * unless the receiver is an <code>ARROW</code> button, in |
| * which case, the argument indicates the direction of |
| * the arrow (one of <code>LEFT</code>, <code>RIGHT</code>, |
| * <code>UP</code> or <code>DOWN</code>). |
| * |
| * @param alignment the new alignment |
| * |
| * @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 setAlignment (int alignment) { |
| checkWidget(); |
| if ((style & SWT.ARROW) != 0) { |
| int [] argList = {OS.XmNarrowDirection, OS.XmARROW_UP}; |
| if ((alignment & SWT.UP) != 0) argList [1] = OS.XmARROW_UP; |
| if ((alignment & SWT.DOWN) != 0) argList [1] = OS.XmARROW_DOWN; |
| if ((alignment & SWT.LEFT) != 0) argList [1] = OS.XmARROW_LEFT; |
| if ((alignment & SWT.RIGHT) != 0) argList [1] = OS.XmARROW_RIGHT; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| return; |
| } |
| if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return; |
| int [] argList = {OS.XmNalignment, OS.XmALIGNMENT_BEGINNING}; |
| if ((alignment & SWT.CENTER) != 0) argList [1] = OS.XmALIGNMENT_CENTER; |
| if ((alignment & SWT.RIGHT) != 0) argList [1] = OS.XmALIGNMENT_END; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| void setBackgroundPixel (int pixel) { |
| super.setBackgroundPixel (pixel); |
| if ((style & SWT.FLAT) != 0) { |
| int [] argList1 = {OS.XmNbottomShadowColor, 0}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| int [] argList2 = {OS.XmNtopShadowColor, argList1 [1]}; |
| OS.XtSetValues (handle, argList2, argList2.length / 2); |
| } |
| int [] argList = {OS.XmNlabelType, 0}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (argList [1] == OS.XmPIXMAP) _setImage (image); |
| } |
| |
| boolean setBounds (int x, int y, int width, int height, boolean move, boolean resize) { |
| boolean changed = super.setBounds (x, y, width, height, move, resize); |
| if (changed && resize && (style & SWT.WRAP) != 0) { |
| int [] argList = {OS.XmNlabelType, 0,}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (argList [1] == OS.XmSTRING) _setText (text); |
| } |
| return changed; |
| } |
| |
| void setDefault (boolean value) { |
| if ((style & SWT.PUSH) == 0) return; |
| if (getShell ().parent == null) return; |
| int [] argList = {OS.XmNshowAsDefault, (value ? 1 : 0)}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| } |
| public void setFont (Font font) { |
| checkWidget(); |
| |
| /* |
| * Bug in Motif. Setting the font in a button widget that does |
| * not have a non-empty string causes GP on UTF-8 locale. |
| * The fix is to set a non-empty string, change the font, |
| * and restore the empty string at the end. |
| */ |
| int [] argList1 = {OS.XmNlabelString, 0, OS.XmNlabelType, 0}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| boolean fixString = OS.IsDBLocale && OS.XmStringEmpty (argList1 [1]); |
| if (fixString) { |
| byte[] buffer = Converter.wcsToMbcs (getCodePage (), "string", true); |
| int xmString = OS.XmStringCreateLocalized (buffer); |
| int [] argList2 = { |
| OS.XmNlabelType, OS.XmSTRING, |
| OS.XmNlabelString, xmString, |
| }; |
| OS.XtSetValues (handle, argList2, argList2.length / 2); |
| OS.XmStringFree (xmString); |
| } |
| super.setFont (font); |
| if (fixString) OS.XtSetValues (handle, argList1, argList1.length / 2); |
| if ((style & SWT.WRAP) != 0) { |
| int [] argList = {OS.XmNlabelType, 0,}; |
| OS.XtGetValues (handle, argList, argList.length / 2); |
| if (argList [1] == OS.XmSTRING) _setText (text); |
| } |
| } |
| /** |
| * Sets the grayed state of the receiver. This state change |
| * only applies if the control was created with the SWT.CHECK |
| * style. |
| * |
| * @param grayed the new grayed 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 setGrayed (boolean grayed) { |
| checkWidget(); |
| if ((style & SWT.CHECK) == 0) return; |
| this.grayed = grayed; |
| } |
| /** |
| * Sets the receiver's image to the argument, which may be |
| * <code>null</code> indicating that no image should be displayed. |
| * <p> |
| * Note that a Button can display an image and text simultaneously |
| * on Windows (starting with XP), GTK+ and OSX. On other platforms, |
| * a Button that has an image and text set into it will display the |
| * image or text that was set most recently. |
| * </p> |
| * @param image the image to display on the receiver (may be <code>null</code>) |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_INVALID_ARGUMENT - if the image has been disposed</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 setImage (Image image) { |
| checkWidget(); |
| if (image != null && image.isDisposed ()) error (SWT.ERROR_INVALID_ARGUMENT); |
| if ((style & SWT.ARROW) != 0) return; |
| this.image = image; |
| /* This code is intentionally commented*/ |
| // if (image == null || text.length () != 0) { |
| // _setText (text); |
| // return; |
| // } |
| _setImage (image); |
| } |
| boolean setRadioSelection (boolean value) { |
| if ((style & SWT.RADIO) == 0) return false; |
| if (getSelection () != value) { |
| setSelection (value); |
| postEvent (SWT.Selection); |
| } |
| return true; |
| } |
| /** |
| * Sets the selection state of the receiver, if it is of type <code>CHECK</code>, |
| * <code>RADIO</code>, or <code>TOGGLE</code>. |
| * |
| * <p> |
| * When the receiver is of type <code>CHECK</code> or <code>RADIO</code>, |
| * it is selected when it is checked. When it is of type <code>TOGGLE</code>, |
| * it is selected when it is pushed in. |
| * |
| * @param selected the new selection 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 setSelection (boolean selected) { |
| checkWidget(); |
| if ((style & (SWT.CHECK | SWT.RADIO | SWT.TOGGLE)) == 0) return; |
| int [] argList = {OS.XmNset, selected ? OS.XmSET : OS.XmUNSET}; |
| OS.XtSetValues (handle, argList, argList.length / 2); |
| updateShadows (); |
| } |
| /** |
| * Sets the receiver's text. |
| * <p> |
| * This method sets the button label. The label may include |
| * the mnemonic character but must not contain line delimiters. |
| * </p> |
| * <p> |
| * Mnemonics are indicated by an '&' that causes the next |
| * character to be the mnemonic. When the user presses a |
| * key sequence that matches the mnemonic, a selection |
| * event occurs. On most platforms, the mnemonic appears |
| * underlined but may be emphasized in a platform specific |
| * manner. The mnemonic indicator character '&' can be |
| * escaped by doubling it in the string, causing a single |
| * '&' to be displayed. |
| * </p><p> |
| * Note that a Button can display an image and text simultaneously |
| * on Windows (starting with XP), GTK+ and OSX. On other platforms, |
| * a Button that has an image and text set into it will display the |
| * image or text that was set most recently. |
| * </p> |
| * @param string the new text |
| * |
| * @exception IllegalArgumentException <ul> |
| * <li>ERROR_NULL_ARGUMENT - if the text 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); |
| if ((style & SWT.ARROW) != 0) return; |
| /* |
| * Feature in Motif. Motif does not optimize the case |
| * when the same text is set into a button causing |
| * it to flash. The fix is to test for equality and |
| * do nothing. |
| */ |
| if (text.equals (string)) return; |
| text = string; |
| /* This code is intentionally commented*/ |
| // if (text.length () == 0 && image != null) { |
| // _setImage (image); |
| // return; |
| // } |
| _setText (string); |
| } |
| int traversalCode (int key, XKeyEvent xEvent) { |
| return super.traversalCode (key, xEvent) | SWT.TRAVERSE_MNEMONIC; |
| } |
| void updateShadows () { |
| if ((style & SWT.FLAT) != 0 && (style & SWT.TOGGLE) != 0) { |
| int [] argList1 = {OS.XmNset, 0}; |
| OS.XtGetValues (handle, argList1, argList1.length / 2); |
| int pixel = argList1 [1] == OS.XmUNSET ? display.compositeBottomShadow : display.compositeTopShadow; |
| int [] argList2 = {OS.XmNtopShadowColor, pixel}; |
| OS.XtSetValues (handle, argList2, argList2.length / 2); |
| } |
| } |
| int xFocusIn (XFocusChangeEvent xEvent) { |
| super.xFocusIn (xEvent); |
| // widget could be disposed at this point |
| if (handle == 0) return 0; |
| if ((style & SWT.PUSH) != 0) { |
| menuShell ().setDefaultButton (this, false); |
| } |
| return 0; |
| } |
| int xFocusOut (XFocusChangeEvent xEvent) { |
| super.xFocusOut (xEvent); |
| // widget could be disposed at this point |
| if (handle == 0) return 0; |
| if ((style & SWT.PUSH) != 0 && getDefault ()) { |
| menuShell ().setDefaultButton (null, false); |
| } |
| return 0; |
| } |
| int XmNactivateCallback (int w, int client_data, int call_data) { |
| postEvent (SWT.Selection); |
| return 0; |
| } |
| int XmNvalueChangedCallback (int w, int client_data, int call_data) { |
| if ((style & SWT.RADIO) != 0) { |
| if ((parent.getStyle () & SWT.NO_RADIO_GROUP) == 0) { |
| selectRadio (); |
| } |
| } |
| updateShadows (); |
| postEvent (SWT.Selection); |
| return 0; |
| } |
| } |