/**
* Constructs a new empty Path.
*
* <p>This operation requires the operating system's advanced graphics subsystem which may not be
* available on some platforms.
*
* @param device the device on which to allocate the path
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the device is null and there is no current device
* </ul>
*
* @exception SWTException
* <ul>
* <li>ERROR_NO_GRAPHICS_LIBRARY - if advanced graphics are not available
* </ul>
*
* @exception SWTError
* <ul>
* <li>ERROR_NO_HANDLES if a handle for the path could not be obtained
* </ul>
*
* @see #dispose()
*/
public Path(Device device) {
super(device);
handle = NSBezierPath.bezierPath();
if (handle == null) SWT.error(SWT.ERROR_NO_HANDLES);
handle.retain();
handle.moveToPoint(new NSPoint());
init();
}
/**
* Adds to the receiver a circular or elliptical arc that lies within the specified rectangular
* area.
*
* <p>The resulting arc begins at <code>startAngle</code> and extends for <code>arcAngle</code>
* degrees. Angles are interpreted such that 0 degrees is at the 3 o'clock position. A positive
* value indicates a counter-clockwise rotation while a negative value indicates a clockwise
* rotation.
*
* <p>The center of the arc is the center of the rectangle whose origin is (<code>x</code>, <code>
* y</code>) and whose size is specified by the <code>width</code> and <code>height</code>
* arguments.
*
* <p>The resulting arc covers an area <code>width + 1</code> pixels wide by <code>height + 1
* </code> pixels tall.
*
* @param x the x coordinate of the upper-left corner of the arc
* @param y the y coordinate of the upper-left corner of the arc
* @param width the width of the arc
* @param height the height of the arc
* @param startAngle the beginning angle
* @param arcAngle the angular extent of the arc, relative to the start angle
* @exception SWTException
* <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
* </ul>
*/
public void addArc(
float x, float y, float width, float height, float startAngle, float arcAngle) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
NSAffineTransform transform = NSAffineTransform.transform();
transform.translateXBy(x + width / 2f, y + height / 2f);
transform.scaleXBy(width / 2f, height / 2f);
NSBezierPath path = NSBezierPath.bezierPath();
NSPoint center = new NSPoint();
float sAngle = -startAngle;
float eAngle = -(startAngle + arcAngle);
path.appendBezierPathWithArcWithCenter_radius_startAngle_endAngle_clockwise_(
center, 1, sAngle, eAngle, arcAngle > 0);
path.transformUsingAffineTransform(transform);
handle.appendBezierPath(path);
}
/**
* Adds to the receiver the pattern of glyphs generated by drawing the given string using the
* given font starting at the point (x, y).
*
* @param string the text to use
* @param x the x coordinate of the starting point
* @param y the y coordinate of the starting point
* @param font the font to use
* @exception IllegalArgumentException
* <ul>
* <li>ERROR_NULL_ARGUMENT - if the font is null
* <li>ERROR_INVALID_ARGUMENT - if the font has been disposed
* </ul>
*
* @exception SWTException
* <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
* </ul>
*/
public void addString(String string, float x, float y, Font font) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
if (font == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if (font.isDisposed()) SWT.error(SWT.ERROR_INVALID_ARGUMENT);
NSString str = NSString.stringWith(string);
NSTextStorage textStorage = ((NSTextStorage) new NSTextStorage().alloc());
textStorage.initWithString_(str);
NSLayoutManager layoutManager = (NSLayoutManager) new NSLayoutManager().alloc().init();
NSTextContainer textContainer = (NSTextContainer) new NSTextContainer().alloc();
NSSize size = new NSSize();
size.width = Float.MAX_VALUE;
size.height = Float.MAX_VALUE;
textContainer.initWithContainerSize(size);
textStorage.addLayoutManager(layoutManager);
layoutManager.addTextContainer(textContainer);
NSRange range = new NSRange();
range.length = str.length();
textStorage.beginEditing();
textStorage.addAttribute(OS.NSFontAttributeName(), font.handle, range);
textStorage.endEditing();
range = layoutManager.glyphRangeForTextContainer(textContainer);
if (range.length != 0) {
int glyphs = OS.malloc(4 * range.length * 2);
layoutManager.getGlyphs(glyphs, range);
NSBezierPath path = NSBezierPath.bezierPath();
NSPoint point = new NSPoint();
point.x = x;
point.y = y;
path.moveToPoint(point);
path.appendBezierPathWithGlyphs(glyphs, range.length, font.handle);
NSAffineTransform transform = NSAffineTransform.transform();
transform.scaleXBy(1, -1);
transform.translateXBy(0, -((2 * y) + textStorage.size().height));
path.transformUsingAffineTransform(transform);
OS.free(glyphs);
handle.appendBezierPath(path);
}
textContainer.release();
layoutManager.release();
textStorage.release();
}