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package YalpClients.SwtClient.GUI;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Vector;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Cursor;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Widget;
/*
* Class to manage SWT resources (Font, Color, Image and Cursor)
* There are no restrictions on the use of this code.
*
* You may change this code and your changes will not be overwritten,
* but if you change the version number below then this class will be
* completely overwritten by Jigloo.
* #SWTResourceManager:version4.0.0#
*/
public class SWTResourceManager {
private static HashMap resources = new HashMap();
private static Vector users = new Vector();
private static SWTResourceManager instance = new SWTResourceManager();
private static DisposeListener disposeListener = new DisposeListener() {
public void widgetDisposed(DisposeEvent e) {
users.remove(e.getSource());
if (users.size() == 0)
dispose();
}
};
/*
* This method should be called by *all* Widgets which use resources
* provided by this SWTResourceManager. When widgets are disposed,
* they are removed from the "users" Vector, and when no more
* registered Widgets are left, all resources are disposed.
* <P>
* If this method is not called for all Widgets then it should not be called
* at all, and the "dispose" method should be explicitly called after all
* resources are no longer being used.
*/
public static void registerResourceUser(Widget widget) {
if (users.contains(widget))
return;
users.add(widget);
widget.addDisposeListener(disposeListener);
}
public static void dispose() {
Iterator it = resources.keySet().iterator();
while (it.hasNext()) {
Object resource = resources.get(it.next());
if (resource instanceof Font)
((Font) resource).dispose();
else if (resource instanceof Color)
((Color) resource).dispose();
else if (resource instanceof Image)
((Image) resource).dispose();
else if (resource instanceof Cursor)
((Cursor) resource).dispose();
}
resources.clear();
}
public static Font getFont(String name, int size, int style) {
return getFont(name, size, style, false, false);
}
public static Font getFont(String name, int size, int style, boolean strikeout, boolean underline) {
String fontName = name + "|" + size + "|" + style + "|" + strikeout + "|" + underline;
if (resources.containsKey(fontName))
return (Font) resources.get(fontName);
FontData fd = new FontData(name, size, style);
if (strikeout || underline) {
try {
Class lfCls = Class.forName("org.eclipse.swt.internal.win32.LOGFONT");
Object lf = FontData.class.getField("data").get(fd);
if (lf != null && lfCls != null) {
if (strikeout)
lfCls.getField("lfStrikeOut").set(lf, new Byte((byte) 1));
if (underline)
lfCls.getField("lfUnderline").set(lf, new Byte((byte) 1));
}
} catch (Throwable e) {
System.err.println(
"Unable to set underline or strikeout" + " (probably on a non-Windows platform). " + e);
}
}
Font font = new Font(Display.getDefault(), fd);
resources.put(fontName, font);
return font;
}
public static Image getImage(String url, Control widget) {
Image img = getImage(url);
if(img != null && widget != null)
img.setBackground(widget.getBackground());
return img;
}
public static Image getImage(String url) {
try {
url = url.replace('\\', '/');
if (url.startsWith("/"))
url = url.substring(1);
if (resources.containsKey(url))
return (Image) resources.get(url);
Image img = new Image(Display.getDefault(), instance.getClass().getClassLoader().getResourceAsStream(url));
if (img != null)
resources.put(url, img);
return img;
} catch (Exception e) {
System.err.println("SWTResourceManager.getImage: Error getting image "+url+", "+e);
return null;
}
}
public static Color getColor(int red, int green, int blue) {
String name = "COLOR:" + red + "," + green + "," + blue;
if (resources.containsKey(name))
return (Color) resources.get(name);
Color color = new Color(Display.getDefault(), red, green, blue);
resources.put(name, color);
return color;
}
public static Cursor getCursor(int type) {
String name = "CURSOR:" + type;
if (resources.containsKey(name))
return (Cursor) resources.get(name);
Cursor cursor = new Cursor(Display.getDefault(), type);
resources.put(name, cursor);
return cursor;
}
}
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