| /******************************************************************************* |
| * Copyright (c) 2000, 2012 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.*; |
| import org.eclipse.swt.events.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.internal.cocoa.*; |
| |
| /** |
| * 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, WRAP</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 <em>not</em> intended to be subclassed. |
| * </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; |
| boolean grayed; |
| |
| static final int EXTRA_HEIGHT = 2; |
| static final int EXTRA_WIDTH = 6; |
| static final int IMAGE_GAP = 2; |
| static final int SMALL_BUTTON_HEIGHT = 28; |
| static final int REGULAR_BUTTON_HEIGHT = 32; |
| static final int MAX_SIZE = 40000; |
| |
| /** |
| * 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)); |
| } |
| |
| /** |
| * 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); |
| } |
| |
| @Override |
| NSSize cellSizeForBounds (long /*int*/ id, long /*int*/ sel, NSRect cellFrame) { |
| NSSize size = super.cellSizeForBounds(id, sel, cellFrame); |
| if (image != null && ((style & (SWT.CHECK|SWT.RADIO)) !=0)) { |
| NSSize imageSize = image.handle.size(); |
| size.width += imageSize.width + IMAGE_GAP; |
| size.height = Math.max(size.height, imageSize.height); |
| } |
| |
| if (((style & (SWT.PUSH|SWT.TOGGLE)) !=0) && (style & (SWT.FLAT|SWT.WRAP)) == 0) { |
| if (image != null) { |
| NSCell cell = new NSCell(id); |
| if (cell.controlSize() == OS.NSSmallControlSize) size.height += EXTRA_HEIGHT; |
| } |
| // TODO: Why is this necessary? |
| size.width += EXTRA_WIDTH; |
| } |
| |
| if ((style & SWT.WRAP) != 0 && text.length() != 0 && cellFrame.width < MAX_SIZE) { |
| NSCell cell = new NSCell (id); |
| NSRect titleRect = cell.titleRectForBounds(cellFrame); |
| NSSize wrapSize = new NSSize(); |
| wrapSize.width = titleRect.width; |
| wrapSize.height = MAX_SIZE; |
| NSAttributedString attribStr = createString(text, null, foreground, style, true, true, true); |
| NSRect rect = attribStr.boundingRectWithSize(wrapSize, OS.NSStringDrawingUsesLineFragmentOrigin); |
| attribStr.release(); |
| double /*float*/ trimHeight = size.height - titleRect.height; |
| size.height = rect.height; |
| if (image != null && ((style & (SWT.CHECK|SWT.RADIO)) !=0)) { |
| NSSize imageSize = image.handle.size(); |
| size.height = Math.max(size.height, imageSize.height); |
| } |
| size.height += trimHeight; |
| } |
| return size; |
| } |
| |
| 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 () { |
| sendSelectionEvent (SWT.Selection); |
| } |
| |
| @Override |
| public Point computeSize (int wHint, int hHint, boolean changed) { |
| checkWidget(); |
| if ((style & SWT.ARROW) != 0) { |
| // TODO use some OS metric instead of hardcoded values |
| int width = wHint != SWT.DEFAULT ? wHint : 14; |
| int height = hHint != SWT.DEFAULT ? hHint : 14; |
| return new Point (width, height); |
| } |
| NSSize size = null; |
| NSCell cell = ((NSButton)view).cell (); |
| if ((style & SWT.WRAP) != 0 && wHint != SWT.DEFAULT) { |
| NSRect rect = new NSRect (); |
| rect.width = wHint; |
| rect.height = hHint != SWT.DEFAULT ? hHint : MAX_SIZE; |
| size = cell.cellSizeForBounds (rect); |
| } else { |
| size = cell.cellSize (); |
| } |
| int width = (int)Math.ceil (size.width); |
| int height = (int)Math.ceil (size.height); |
| if (wHint != SWT.DEFAULT) width = wHint; |
| if (hHint != SWT.DEFAULT) height = hHint; |
| return new Point (width, height); |
| } |
| |
| NSAttributedString createString() { |
| NSAttributedString attribStr = createString(text, null, foreground, style, false, true, true); |
| attribStr.autorelease(); |
| return attribStr; |
| } |
| |
| @Override |
| void createHandle () { |
| if ((style & SWT.PUSH) == 0) state |= THEME_BACKGROUND; |
| NSButton widget = (NSButton)new SWTButton().alloc(); |
| widget.init(); |
| NSButtonCell cell = (NSButtonCell)new SWTButtonCell ().alloc ().init (); |
| widget.setCell (cell); |
| cell.release (); |
| if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0 && (style & SWT.FLAT) == 0) { |
| NSView superview = parent.view; |
| while (superview != null) { |
| if (superview.isKindOfClass(OS.class_NSTableView)) { |
| style |= SWT.FLAT; |
| break; |
| } |
| superview = superview.superview(); |
| } |
| } |
| int type = OS.NSMomentaryLightButton; |
| if ((style & SWT.PUSH) != 0) { |
| if ((style & SWT.FLAT) != 0) { |
| widget.setBezelStyle(OS.NSShadowlessSquareBezelStyle); |
| } else { |
| widget.setBezelStyle((style & SWT.WRAP) != 0 ? OS.NSRegularSquareBezelStyle : OS.NSRoundedBezelStyle); |
| } |
| } else if ((style & SWT.CHECK) != 0) { |
| type = OS.NSSwitchButton; |
| } else if ((style & SWT.RADIO) != 0) { |
| type = OS.NSRadioButton; |
| } else if ((style & SWT.TOGGLE) != 0) { |
| type = OS.NSPushOnPushOffButton; |
| if ((style & SWT.FLAT) != 0) { |
| widget.setBezelStyle(OS.NSShadowlessSquareBezelStyle); |
| } else { |
| widget.setBezelStyle((style & SWT.WRAP) != 0 ? OS.NSRegularSquareBezelStyle : OS.NSRoundedBezelStyle); |
| } |
| } else if ((style & SWT.ARROW) != 0) { |
| widget.setBezelStyle(OS.NSShadowlessSquareBezelStyle); |
| } |
| widget.setButtonType(type); |
| widget.setTitle(NSString.string()); |
| widget.setImagePosition(OS.NSImageLeft); |
| widget.setTarget(widget); |
| widget.setAction(OS.sel_sendSelection); |
| view = widget; |
| _setAlignment(style); |
| } |
| |
| @Override |
| void createWidget() { |
| text = ""; |
| super.createWidget (); |
| } |
| |
| @Override |
| Font defaultFont () { |
| return Font.cocoa_new (display, defaultNSFont ()); |
| } |
| |
| @Override |
| NSFont defaultNSFont() { |
| NSCell cell = ((NSControl)view).cell(); |
| return NSFont.systemFontOfSize (NSFont.systemFontSizeForControlSize (cell.controlSize())); |
| } |
| |
| @Override |
| void deregister () { |
| super.deregister (); |
| display.removeWidget(((NSControl)view).cell()); |
| } |
| |
| @Override |
| boolean dragDetect(int x, int y, boolean filter, boolean[] consume) { |
| boolean dragging = super.dragDetect(x, y, filter, consume); |
| consume[0] = dragging; |
| return dragging; |
| } |
| |
| @Override |
| void drawImageWithFrameInView (long /*int*/ id, long /*int*/ sel, long /*int*/ image, NSRect rect, long /*int*/ view) { |
| /* |
| * Feature in Cocoa. Images touch the edge of rounded buttons |
| * when set to small size. The fix to subclass the button cell |
| * and offset the image drawing. |
| * This workaround is not required for OSX 10.9 and later as |
| * the problem doesn't happen there. |
| */ |
| if (OS.VERSION_MMB < OS.VERSION_MMB(10, 9, 0)) { |
| NSCell cell = ((NSControl)this.view).cell(); |
| if (cell != null && cell.controlSize() == OS.NSRegularControlSize) { |
| if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0 && (style & (SWT.FLAT | SWT.WRAP)) == 0) { |
| rect.y += EXTRA_HEIGHT / 2; |
| rect.height += EXTRA_HEIGHT; |
| } |
| } |
| } |
| super.drawImageWithFrameInView(id, sel, image, rect, view); |
| } |
| |
| @Override |
| void drawInteriorWithFrame_inView (long /*int*/ id, long /*int*/ sel, NSRect cellRect, long /*int*/ viewid) { |
| if ((style & (SWT.CHECK|SWT.RADIO)) != 0 && backgroundImage != null) { |
| fillBackground (new NSView(viewid), NSGraphicsContext.currentContext(), cellRect, -1); |
| } |
| super.drawInteriorWithFrame_inView(id, sel, cellRect, viewid); |
| if (image != null && ((style & (SWT.CHECK|SWT.RADIO)) !=0)) { |
| NSSize imageSize = image.handle.size(); |
| NSCell nsCell = new NSCell(id); |
| double /*float*/ x = 0; |
| double /*float*/ y = (imageSize.height - cellRect.height)/2f; |
| NSRect imageRect = nsCell.imageRectForBounds(cellRect); |
| NSSize stringSize = ((NSButton)view).attributedTitle().size(); |
| switch (style & (SWT.LEFT|SWT.RIGHT|SWT.CENTER)) { |
| case SWT.LEFT: |
| x = imageRect.x + imageRect.width + IMAGE_GAP; |
| break; |
| case SWT.CENTER: |
| x = cellRect.x + imageRect.x + imageRect.width + ((cellRect.width-stringSize.width)/2f) - imageSize.width - IMAGE_GAP; |
| break; |
| case SWT.RIGHT: |
| x = cellRect.x + cellRect.width - stringSize.width - imageSize.width - IMAGE_GAP; |
| break; |
| } |
| NSRect destRect = new NSRect(); |
| destRect.x = x; |
| destRect.y = y; |
| destRect.width = imageSize.width; |
| destRect.height = imageSize.height; |
| NSGraphicsContext.static_saveGraphicsState(); |
| NSAffineTransform transform = NSAffineTransform.transform(); |
| transform.scaleXBy(1, -1); |
| transform.translateXBy(0, -imageSize.height); |
| transform.concat(); |
| image.handle.drawInRect(destRect, new NSRect(), OS.NSCompositeSourceOver, 1); |
| NSGraphicsContext.static_restoreGraphicsState(); |
| } |
| |
| } |
| |
| @Override |
| NSRect drawTitleWithFrameInView (long /*int*/ id, long /*int*/ sel, long /*int*/ title, NSRect titleRect, long /*int*/ view) { |
| boolean wrap = (style & SWT.WRAP) != 0 && text.length() != 0; |
| if (wrap) { |
| NSSize wrapSize = new NSSize(); |
| wrapSize.width = titleRect.width; |
| wrapSize.height = MAX_SIZE; |
| NSAttributedString attribStr = createString(text, null, foreground, style, true, true, true); |
| NSRect rect = attribStr.boundingRectWithSize(wrapSize, OS.NSStringDrawingUsesLineFragmentOrigin); |
| switch (style & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) { |
| case SWT.LEFT: |
| rect.x = titleRect.x; |
| break; |
| case SWT.CENTER: |
| rect.x = titleRect.x + (titleRect.width - rect.width) / 2f; |
| break; |
| case SWT.RIGHT: |
| rect.x = titleRect.x + titleRect.width - rect.width; |
| break; |
| } |
| rect.y = titleRect.y + (titleRect.height - rect.height) / 2; |
| attribStr.drawInRect(rect); |
| attribStr.release (); |
| return rect; |
| } |
| return super.drawTitleWithFrameInView(id, sel, title, titleRect, view); |
| } |
| |
| @Override |
| boolean drawsBackground() { |
| return background != null || backgroundImage != null; |
| } |
| |
| @Override |
| void drawWidget (long /*int*/ id, NSGraphicsContext context, NSRect rect) { |
| if ((style & SWT.ARROW) != 0) { |
| NSRect frame = view.frame(); |
| int arrowSize = Math.min((int)frame.height, (int)frame.width) / 2; |
| context.saveGraphicsState(); |
| NSPoint p1 = new NSPoint(); |
| p1.x = -arrowSize / 2; |
| p1.y = -arrowSize / 2; |
| NSPoint p2 = new NSPoint(); |
| p2.x = arrowSize / 2; |
| p2.y = p1.y; |
| NSPoint p3 = new NSPoint(); |
| p3.y = arrowSize / 2; |
| |
| NSBezierPath path = NSBezierPath.bezierPath(); |
| path.moveToPoint(p1); |
| path.lineToPoint(p2); |
| path.lineToPoint(p3); |
| path.closePath(); |
| |
| NSAffineTransform transform = NSAffineTransform.transform(); |
| if ((style & SWT.LEFT) != 0) { |
| transform.rotateByDegrees(90); |
| } else if ((style & SWT.UP) != 0) { |
| transform.rotateByDegrees(180); |
| } else if ((style & SWT.RIGHT) != 0) { |
| transform.rotateByDegrees(-90); |
| } |
| path.transformUsingAffineTransform(transform); |
| transform = NSAffineTransform.transform(); |
| transform.translateXBy(frame.width / 2, frame.height / 2); |
| path.transformUsingAffineTransform(transform); |
| |
| NSColor color = isEnabled() ? NSColor.blackColor() : NSColor.disabledControlTextColor(); |
| color.set(); |
| path.fill(); |
| context.restoreGraphicsState(); |
| } |
| super.drawWidget (id, context, rect); |
| } |
| |
| @Override |
| NSRect focusRingMaskBoundsForFrame (long /*int*/ id, long /*int*/ sel, NSRect cellFrame, long /*int*/ view) { |
| return cellFrame; |
| } |
| |
| /** |
| * 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) { |
| if ((style & SWT.UP) != 0) return SWT.UP; |
| if ((style & SWT.DOWN) != 0) return SWT.DOWN; |
| if ((style & SWT.LEFT) != 0) return SWT.LEFT; |
| if ((style & SWT.RIGHT) != 0) return SWT.RIGHT; |
| return SWT.UP; |
| } |
| if ((style & SWT.LEFT) != 0) return SWT.LEFT; |
| if ((style & SWT.CENTER) != 0) return SWT.CENTER; |
| if ((style & SWT.RIGHT) != 0) return SWT.RIGHT; |
| return SWT.LEFT; |
| } |
| |
| /** |
| * 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; |
| } |
| |
| @Override |
| 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; |
| if ((style & SWT.CHECK) != 0 && grayed) return ((NSButton)view).state() == OS.NSMixedState; |
| return ((NSButton)view).state() == OS.NSOnState; |
| } |
| |
| /** |
| * 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 (); |
| return text; |
| } |
| |
| @Override |
| boolean isDescribedByLabel () { |
| return false; |
| } |
| |
| /* |
| * Feature in Cocoa. If a checkbox is in multi-state mode, nextState cycles from off to mixed to on and back to off again. |
| * This will cause the on state to momentarily appear while clicking on the checkbox. To avoid this, we override [NSCell nextState] |
| * to go directly to the desired state if we have a grayed checkbox. |
| */ |
| @Override |
| long /*int*/ nextState(long /*int*/ id, long /*int*/ sel) { |
| if ((style & SWT.CHECK) != 0 && grayed) { |
| return ((NSButton)view).state() == OS.NSMixedState ? OS.NSOffState : OS.NSMixedState; |
| } |
| |
| return super.nextState(id, sel); |
| } |
| |
| @Override |
| void register() { |
| super.register(); |
| display.addWidget(((NSControl)view).cell(), this); |
| } |
| |
| @Override |
| void releaseWidget () { |
| super.releaseWidget (); |
| image = null; |
| text = 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); |
| } |
| |
| @Override |
| void sendSelection () { |
| if ((style & SWT.RADIO) != 0) { |
| if ((parent.getStyle () & SWT.NO_RADIO_GROUP) == 0) { |
| selectRadio (); |
| } |
| } |
| if ((style & SWT.CHECK) != 0) { |
| if (grayed && ((NSButton)view).state() == OS.NSOnState) { |
| ((NSButton)view).setState(OS.NSOffState); |
| } |
| if (!grayed && ((NSButton)view).state() == OS.NSMixedState) { |
| ((NSButton)view).setState(OS.NSOnState); |
| } |
| } |
| sendSelectionEvent (SWT.Selection); |
| } |
| |
| |
| /** |
| * 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 (); |
| _setAlignment (alignment); |
| redraw (); |
| } |
| |
| void _setAlignment (int alignment) { |
| if ((style & SWT.ARROW) != 0) { |
| if ((style & (SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT)) == 0) return; |
| style &= ~(SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT); |
| style |= alignment & (SWT.UP | SWT.DOWN | SWT.LEFT | SWT.RIGHT); |
| return; |
| } |
| if ((alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER)) == 0) return; |
| style &= ~(SWT.LEFT | SWT.RIGHT | SWT.CENTER); |
| style |= alignment & (SWT.LEFT | SWT.RIGHT | SWT.CENTER); |
| /* text is still null when this is called from createHandle() */ |
| if (text != null) { |
| ((NSButton)view).setAttributedTitle(createString()); |
| } |
| } |
| |
| @Override |
| void setBackgroundColor(NSColor nsColor) { |
| Control control = findBackgroundControl(); |
| if (control == null || control.backgroundImage == null) { |
| NSButtonCell cell = new NSButtonCell(((NSButton)view).cell()); |
| cell.setBackgroundColor(nsColor); |
| } |
| } |
| |
| @Override |
| void setBackgroundImage(NSImage image) { |
| if (image != null) { |
| NSButtonCell cell = new NSButtonCell(((NSButton)view).cell()); |
| cell.setBackgroundColor(null); |
| } |
| } |
| |
| @Override |
| void setBounds (int x, int y, int width, int height, boolean move, boolean resize) { |
| if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0 && (style & (SWT.FLAT | SWT.WRAP)) == 0) { |
| int heightThreshold = REGULAR_BUTTON_HEIGHT; |
| |
| NSCell cell = ((NSControl)view).cell(); |
| if (cell != null && cell.controlSize() == OS.NSSmallControlSize) { |
| heightThreshold = SMALL_BUTTON_HEIGHT; |
| } |
| |
| NSButton button = (NSButton)view; |
| if (height > heightThreshold) { |
| button.setBezelStyle(OS.NSRegularSquareBezelStyle); |
| } else { |
| button.setBezelStyle(OS.NSRoundedBezelStyle); |
| } |
| } |
| super.setBounds(x, y, width, height, move, resize); |
| } |
| |
| @Override |
| void setFont (NSFont font) { |
| if (text != null) { |
| ((NSButton)view).setAttributedTitle(createString()); |
| } |
| } |
| |
| @Override |
| void setForeground (double /*float*/ [] color) { |
| ((NSButton)view).setAttributedTitle(createString()); |
| } |
| |
| /** |
| * 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; |
| boolean checked = getSelection (); |
| this.grayed = grayed; |
| ((NSButton) view).setAllowsMixedState(grayed); |
| |
| if (checked) { |
| if (grayed) { |
| ((NSButton) view).setState (OS.NSMixedState); |
| } else { |
| ((NSButton) view).setState (OS.NSOnState); |
| } |
| } |
| } |
| |
| /** |
| * 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; |
| if ((style & (SWT.RADIO|SWT.CHECK)) == 0) { |
| /* |
| * Feature in Cocoa. If the NSImage object being set into the button is |
| * the same NSImage object that is already there then the button does not |
| * redraw itself. This results in the button's image not visually updating |
| * if the NSImage object's content has changed since it was last set |
| * into the button. The workaround is to explicitly redraw the button. |
| */ |
| ((NSButton)view).setImage(image != null ? image.handle : null); |
| view.setNeedsDisplay(true); |
| } else { |
| ((NSButton)view).setAttributedTitle(createString()); |
| } |
| |
| if (image != null) { |
| if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0 && (style & (SWT.FLAT | SWT.WRAP)) == 0) { |
| NSCell cell = ((NSButton)view).cell(); |
| NSSize size = cell.cellSize (); |
| int height = (int)Math.ceil(size.height); |
| if (height > SMALL_BUTTON_HEIGHT) { |
| cell.setControlSize(OS.NSRegularControlSize); |
| } else if (display.smallFonts){ |
| cell.setControlSize(OS.NSSmallControlSize); |
| } |
| setFont(getFont()); |
| } |
| } |
| |
| updateAlignment (); |
| } |
| |
| @Override |
| boolean setRadioSelection (boolean value){ |
| if ((style & SWT.RADIO) == 0) return false; |
| if (getSelection () != value) { |
| setSelection (value); |
| sendSelectionEvent (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; |
| if (grayed) { |
| ((NSButton)view).setState (selected ? OS.NSMixedState : OS.NSOffState); |
| } else { |
| ((NSButton)view).setState (selected ? OS.NSOnState : OS.NSOffState); |
| } |
| } |
| |
| /** |
| * 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; |
| text = string; |
| ((NSButton)view).setAttributedTitle(createString()); |
| updateAlignment (); |
| } |
| |
| @Override |
| NSRect titleRectForBounds (long /*int*/ id, long /*int*/ sel, NSRect cellFrame) { |
| NSRect rect = super.titleRectForBounds(id, sel, cellFrame); |
| if (image != null && ((style & (SWT.CHECK|SWT.RADIO)) !=0)) { |
| NSSize imageSize = image.handle.size(); |
| rect.x += imageSize.width + IMAGE_GAP; |
| rect.width -= (imageSize.width + IMAGE_GAP); |
| rect.width = Math.max(0f, rect.width); |
| } |
| return rect; |
| } |
| |
| @Override |
| int traversalCode (int key, NSEvent theEvent) { |
| int code = super.traversalCode (key, theEvent); |
| if ((style & SWT.ARROW) != 0) code &= ~(SWT.TRAVERSE_TAB_NEXT | SWT.TRAVERSE_TAB_PREVIOUS); |
| if ((style & SWT.RADIO) != 0) code |= SWT.TRAVERSE_ARROW_NEXT | SWT.TRAVERSE_ARROW_PREVIOUS; |
| return code; |
| } |
| |
| void updateAlignment () { |
| NSButton widget = (NSButton)view; |
| if ((style & (SWT.PUSH | SWT.TOGGLE)) != 0) { |
| if (text.length() != 0 && image != null) { |
| widget.setImagePosition(OS.NSImageLeft); |
| } else { |
| widget.setImagePosition(text.length() != 0 ? OS.NSNoImage : OS.NSImageOnly); |
| } |
| } |
| } |
| |
| } |