/**
* Sets the current point of the receiver to the point specified by (x, y). Note that this starts
* a new sub path.
*
* @param x the x coordinate of the new end point
* @param y the y coordinate of the new end point
* @exception SWTException
* <ul>
* <li>ERROR_GRAPHIC_DISPOSED - if the receiver has been disposed
* </ul>
*/
public void moveTo(float x, float y) {
if (isDisposed()) SWT.error(SWT.ERROR_GRAPHIC_DISPOSED);
NSPoint pt = new NSPoint();
pt.x = x;
pt.y = y;
handle.moveToPoint(pt);
}
/**
* 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 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();
}