update/org.eclipse.update.ui.forms/src/org/eclipse/update/ui/forms/internal/AbstractSectionForm.java

package org.eclipse.update.ui.forms.internal;
/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */
import java.util.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.dnd.Clipboard;
import org.eclipse.swt.custom.ScrolledComposite;
import org.eclipse.swt.graphics.*;

/**
 * This form class understands form sections.
 * It assumes that they are part of the form
 * and it offers life cycle handling of sections
 * once they are registered.
 */

public abstract class AbstractSectionForm extends AbstractForm {
	protected Vector sections = null;

	public void registerSection(FormSection section) {
		if (sections == null)
			sections = new Vector();
		if (!sections.contains(section))
			sections.add(section);
	}

	public void unregisterSection(FormSection section) {
		if (sections != null && sections.contains(section))
			sections.remove(section);
	}

	public void initialize(Object model) {
		if (sections != null) {
			for (Iterator iter = sections.iterator(); iter.hasNext();) {
				FormSection section = (FormSection) iter.next();
				section.initialize(model);
			}
		}
	}

	public void setFocus() {
		if (sections != null && sections.size() > 0) {
			FormSection firstSection = (FormSection) sections.firstElement();
			firstSection.setFocus();
		}
	}

	public void update() {
		if (sections != null) {
			for (Iterator iter = sections.iterator(); iter.hasNext();) {
				FormSection section = (FormSection) iter.next();
				section.update();
			}
		}
	}

	public void commitChanges(boolean onSave) {
		if (sections != null) {
			for (Iterator iter = sections.iterator(); iter.hasNext();) {
				FormSection section = (FormSection) iter.next();
				if (section.isDirty())
					section.commitChanges(onSave);
			}
		}
	}

	public boolean doGlobalAction(String actionId) {
		Control focusControl = getFocusControl();
		if (focusControl == null)
			return false;

		if (canPerformDirectly(actionId, focusControl))
			return true;
		Composite parent = focusControl.getParent();
		FormSection targetSection = null;
		while (parent != null) {
			Object data = parent.getData();
			if (data != null && data instanceof FormSection) {
				targetSection = (FormSection) data;
				break;
			}
			parent = parent.getParent();
		}
		if (targetSection != null) {
			return targetSection.doGlobalAction(actionId);
		}
		return false;
	}

	protected Control getFocusControl() {
		Control control = getControl();
		if (control == null || control.isDisposed())
			return null;
		Display display = control.getDisplay();
		Control focusControl = display.getFocusControl();
		if (focusControl == null || focusControl.isDisposed())
			return null;
		return focusControl;
	}

	public boolean canPaste(Clipboard clipboard) {
		Control focusControl = getFocusControl();
		if (focusControl == null)
			return false;
		Composite parent = focusControl.getParent();
		FormSection targetSection = null;
		while (parent != null) {
			Object data = parent.getData();
			if (data != null && data instanceof FormSection) {
				targetSection = (FormSection) data;
				break;
			}
			parent = parent.getParent();
		}
		if (targetSection != null) {
			return targetSection.canPaste(clipboard);
		}
		return false;
	}

	public void dispose() {
		if (sections != null) {
			for (Iterator iter = sections.iterator(); iter.hasNext();) {
				FormSection section = (FormSection) iter.next();
				section.dispose();
			}
		}
		super.dispose();
	}

	public static void ensureVisible(ScrolledComposite scomp, Control control) {
//		Point controlSize = control.getSize();
//		Point origin = scomp.getOrigin();
//		Rectangle area = sc1.getClientArea();
//		
//		Point displayOrigin = scomp.toDisplay(origin);
//		Point controlOrigin = control.toDisplay(control.getLocation());
//		
//		int x = origin.x;
//		int y = origin.y;
//		if (bounds.x < origin.x) {
//			x = Math.max(0, bounds.x);
//		}
//		if (bounds.y < origin.y) {
//			y = Math.max(0, bounds.y);
//		}
//		if (bounds.x + bounds.width > origin.x + area.width) {
//			x = Math.max(0, bounds.x + bounds.width - area.width);
//		}
//		if (bounds.y + bounds.height > origin.y + area.height) {
//			y = Math.max(0, bounds.y + bounds.height - area.height);
//		}
//		sc1.setOrigin(x, y);

	}

}