/**
* Copyright (c) 2013-2016 Angelo ZERR.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
*/
package tern.eclipse.ide.ui.controls;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.swt.widgets.Tree;
/**
* Blocks that contain a table. This abstract class conveniently saves and
* restores the table's column settings.
*
*/
public abstract class AbstractTreeBlock {
private int fSortColumn;
protected abstract Tree getTree();
protected abstract IDialogSettings getDialogSettings();
protected abstract String getQualifier();
protected void setSortColumn(int column) {
fSortColumn = column;
}
/**
* Persist table settings into the give dialog store, prefixed with the
* given key.
*/
public void saveColumnSettings() {
int columnCount = getTree().getColumnCount();
for (int i = 0; i < columnCount; i++) {
getDialogSettings()
.put(getQualifier() + ".columnWidth" + i, getTree().getColumn(i).getWidth()); //$NON-NLS-1$
}
getDialogSettings().put(getQualifier() + ".sortColumn", fSortColumn); //$NON-NLS-1$
}
/**
* Restore table settings from the given dialog store using the given key.
*/
public void restoreColumnSettings() {
getTree().layout(true);
restoreColumnWidths(getDialogSettings(), getQualifier());
int col = 0;
try {
col = getDialogSettings().getInt(getQualifier() + ".sortColumn"); //$NON-NLS-1$
} catch (NumberFormatException e) {
col = 1;
}
setSortColumn(col);
}
private void restoreColumnWidths(IDialogSettings settings, String qualifier) {
int columnCount = getTree().getColumnCount();
for (int i = 0; i < columnCount; i++) {
int width = -1;
try {
width = settings.getInt(qualifier + ".columnWidth" + i); //$NON-NLS-1$
} catch (NumberFormatException e) {
}
if (width > 0)
getTree().getColumn(i).setWidth(width);
}
}
public void dispose() {
if (getTree() != null && !getTree().isDisposed())
saveColumnSettings();
}
}