ControlRenderer.computeDefaultSize: push to implementations

because some implementations will need size hint arguments

Author: Thomas Singer

bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/widgets/ButtonRenderer.java

@@ -18,6 +18,8 @@
 
 public abstract class ButtonRenderer extends ControlRenderer<Button> {
 
+	public abstract Point computeDefaultSize();
+
 	private Image disabledImage;
 	private boolean pressed;
 	private boolean hover;

bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/widgets/ControlRenderer.java

@@ -20,8 +20,6 @@
 
 public abstract class ControlRenderer <C extends Control> {
 
-	public abstract Point computeDefaultSize();
-
 	protected abstract void paint(GC gc, int width, int height);
 
 	protected final C control;

bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/widgets/LabelRenderer.java

@@ -18,6 +18,8 @@
 
 public abstract class LabelRenderer extends ControlRenderer<Label> {
 
+	public abstract Point computeDefaultSize();
+
 	/** a string inserted in the middle of text that has been shortened */
 	private static final String ELLIPSIS = "..."; //$NON-NLS-1$ // could use
 	// the ellipsis glyph on

bundles/org.eclipse.swt/Eclipse SWT/common/org/eclipse/swt/widgets/ScaleRenderer.java

@@ -19,6 +19,9 @@
  * Interface for all scale renderer
  */
 public abstract class ScaleRenderer extends ControlRenderer<Scale> {
+
+	public abstract Point computeDefaultSize();
+
 	/**
 	 * Maps the point to a scale value
 	 *