/*******************************************************************************
* 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);
}
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);
}
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;
}
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);
}
void createWidget() {
text = "";
super.createWidget ();
}
Font defaultFont () {
return Font.cocoa_new (display, defaultNSFont ());
}
NSFont defaultNSFont() {
NSCell cell = ((NSControl)view).cell();
return NSFont.systemFontOfSize (NSFont.systemFontSizeForControlSize (cell.controlSize()));
}
void deregister () {
super.deregister ();
display.removeWidget(((NSControl)view).cell());
}
boolean dragDetect(int x, int y, boolean filter, boolean[] consume) {
boolean dragging = super.dragDetect(x, y, filter, consume);
consume[0] = dragging;
return dragging;
}
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.
*/
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);
}
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();
}
}
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);
}
boolean drawsBackground() {
return background != null || backgroundImage != null;
}
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);
}
/**
* 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;
}
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;
}
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.
*/
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);
}
void register() {
super.register();
display.addWidget(((NSControl)view).cell(), this);
}
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);
}
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());
}
}
void setBackgroundColor(NSColor nsColor) {
Control control = findBackgroundControl();
if (control == null || control.backgroundImage == null) {
NSButtonCell cell = new NSButtonCell(((NSButton)view).cell());
cell.setBackgroundColor(nsColor);
}
}
void setBackgroundImage(NSImage image) {
if (image != null) {
NSButtonCell cell = new NSButtonCell(((NSButton)view).cell());
cell.setBackgroundColor(null);
}
}
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);
}
void setFont (NSFont font) {
if (text != null) {
((NSButton)view).setAttributedTitle(createString());
}
}
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 ();
}
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 ();
}
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;
}
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);
}
}
}
}