Package org.eclipse.swt.internal

Class SWTFontProvider

java.lang.Object

org.eclipse.swt.internal.SWTFontProvider

public class SWTFontProvider
extends Object

This internal class is used to provide and cache fonts scaled for different zoom levels in the win32 implementation. Depending on the configuration of the SWT application, either a default behavior or the scaling behavior is used. The default behavior mimics the existing behavior that fonts are scaled to the zoom of the primary monitor and are not updated on runtime. The scaling behavior will always take the provided values for the zoom into consideration and return scaled variant of a font if necessary.

Constructor Summary

Constructors

Constructor	Description
SWTFontProvider()

Method Summary

Modifier and Type	Method	Description
static void	disposeFontRegistry(Device device)	Disposes the font registry for the given device, if one exists.
static Font	getFont(Device device, long fontHandle, int zoom)	Returns the font with the given fontHandle for the given device at the specified zoom.
static Font	getFont(Device device, FontData fontData, int zoom)	Returns the font with the given font data for the given device at the specified zoom.
static long	getFontHandle(Device device, FontData fontData, int zoom)
static long	getFontHandle(Font font, int zoom)
static Font	getSystemFont(Device device, int zoom)	Returns the system font for the given device at the specified zoom.
static long	getSystemFontHandle(Device device, int zoom)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SWTFontProvider

public SWTFontProvider()

Method Details

getSystemFont

public static Font getSystemFont(Device device,
 int zoom)

Returns the system font for the given device at the specified zoom. Note: This operation is not thread-safe. It must thus always be called from the same thread for the same device, such as the display's UI thread.

Parameters:

device - the device to retrieve the font for, must not be null

zoom - the zoom for which the font shall be scaled

getSystemFontHandle

public static long getSystemFontHandle(Device device,
 int zoom)

getFont

public static Font getFont(Device device,
 FontData fontData,
 int zoom)

Returns the font with the given font data for the given device at the specified zoom. Note: This operation is not thread-safe. It must thus always be called from the same thread for the same device, such as the display's UI thread.

Parameters:

device - the device to retrieve the font for, must not be null

fontData - the data for the font to retrieve, must not be null

zoom - the zoom for which the font shall be scaled

getFontHandle

public static long getFontHandle(Device device,
 FontData fontData,
 int zoom)

getFontHandle

public static long getFontHandle(Font font,
 int zoom)

getFont

public static Font getFont(Device device,
 long fontHandle,
 int zoom)

Returns the font with the given fontHandle for the given device at the specified zoom. Note: This operation is not thread-safe. It must thus always be called from the same thread for the same device, such as the display's UI thread.

Parameters:

device - the device to retrieve the font for, must not be null

fontHandle - the handle to an existing font

zoom - the zoom for which the font shall be scaled

disposeFontRegistry

public static void disposeFontRegistry(Device device)

Disposes the font registry for the given device, if one exists.

Parameters:

device - the device to dispose the font registry for, must not be null