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/*******************************************************************************
* Copyright (c) 2008, 2012 Nokia and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Nokia - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.debug.internal.ui.views.executables;
import org.eclipse.core.runtime.Preferences;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeColumn;
/**
* Base viewer used by both the executables viewers and the source files viewer.
*/
abstract class BaseViewer extends TreeViewer {
// Common columns
protected TreeColumn nameColumn;
protected TreeColumn locationColumn;
protected TreeColumn sizeColumn;
protected TreeColumn modifiedColumn;
protected TreeColumn typeColumn;
private static final int NUM_COLUMNS = 7;
int column_sort_order[] = new int[NUM_COLUMNS];
private ExecutablesView executablesView;
class ColumnSelectionAdapter extends SelectionAdapter {
private int selector;
public ColumnSelectionAdapter(int selector) {
this.selector = selector;
}
@Override
public void widgetSelected(SelectionEvent e) {
setComparator(getViewerComparator(selector));
getTree().setSortColumn((TreeColumn) e.getSource());
getTree().setSortDirection(column_sort_order[selector] == ExecutablesView.ASCENDING ? SWT.UP : SWT.DOWN);
column_sort_order[selector] *= -1;
}
}
public BaseViewer(ExecutablesView view, Composite parent, int style) {
super(parent, style);
executablesView = view;
// default all columns sort order to ascending
for (int i=0; i<NUM_COLUMNS; i++) {
column_sort_order[i] = ExecutablesView.ASCENDING;
}
}
public ExecutablesView getExecutablesView() {
return executablesView;
}
protected void packColumns() {
TreeColumn[] columns = getTree().getColumns();
for (TreeColumn treeColumn : columns) {
if (treeColumn.getWidth() > 0) {
treeColumn.pack();
treeColumn.setWidth(treeColumn.getWidth() + ExecutablesView.COLUMN_WIDTH_PADDING);
}
}
}
protected void saveColumnSettings(Preferences preferences) {
Tree tree = getTree();
// save the column order
StringBuilder columnOrder = new StringBuilder();
for (int index : tree.getColumnOrder()) {
columnOrder.append(","); //$NON-NLS-1$
columnOrder.append(Integer.toString(index));
}
// trim the leading comma
columnOrder.deleteCharAt(0);
preferences.setValue(getColumnOrderKey(), columnOrder.toString());
// save which column was sorted and in which direction
TreeColumn sortedColumn = tree.getSortColumn();
for (int i=0; i<tree.getColumnCount(); i++) {
if (sortedColumn.equals(tree.getColumn(i))) {
preferences.setValue(getSortedColumnIndexKey(), i);
preferences.setValue(getSortedColumnDirectionKey(), tree.getSortDirection());
break;
}
}
// save the visible state of each columns (1 is visible, 0 is not)
String visibleColumns = ""; //$NON-NLS-1$
for (int i=0; i<tree.getColumnCount(); i++) {
if (tree.getColumn(i).getWidth() > 0) {
visibleColumns += ",1"; //$NON-NLS-1$
} else {
visibleColumns += ",0"; //$NON-NLS-1$
}
}
// trim the leading comma
visibleColumns = visibleColumns.substring(1);
preferences.setValue(getVisibleColumnsKey(), visibleColumns);
}
protected void restoreColumnSettings(Preferences preferences) {
Tree tree = getTree();
// restore the column order
String columnOrder = preferences.getString(getColumnOrderKey());
if (columnOrder.length() > 0) {
String[] columns = columnOrder.split(","); //$NON-NLS-1$
int[] columnNumbers = new int[columns.length];
for (int i=0; i<columns.length; i++) {
columnNumbers[i] = Integer.parseInt(columns[i]);
}
tree.setColumnOrder(columnNumbers);
}
// restore the sorted column
int sortedColumnIndex = preferences.getInt(getSortedColumnIndexKey());
int sortedColumnDirection = preferences.getInt(getSortedColumnDirectionKey());
tree.setSortColumn(tree.getColumn(sortedColumnIndex));
tree.setSortDirection(sortedColumnDirection == 0 ? SWT.UP : sortedColumnDirection);
setComparator(getViewerComparator(sortedColumnIndex));
// remember the sort order for the column
column_sort_order[sortedColumnIndex] = sortedColumnDirection == SWT.UP ? ExecutablesView.ASCENDING : ExecutablesView.DESCENDING;
// restore the visible state of each columns (1 is visible, 0 is not)
String visibleColumns = preferences.getString(getVisibleColumnsKey());
if (visibleColumns.length() <= 0) {
visibleColumns = getDefaultVisibleColumnsValue();
}
String[] columns = visibleColumns.split(","); //$NON-NLS-1$
for (int i=0; i<columns.length; i++) {
if (columns[i].equals("0")) { //$NON-NLS-1$
tree.getColumn(i).setWidth(0);
}
}
}
abstract protected ViewerComparator getViewerComparator(int sortType);
abstract protected String getColumnOrderKey();
abstract protected String getSortedColumnIndexKey();
abstract protected String getSortedColumnDirectionKey();
abstract protected String getVisibleColumnsKey();
abstract protected String getDefaultVisibleColumnsValue();
}
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