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/*******************************************************************************
* Copyright (c) 2011 Wind River Systems, Inc. and others. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.ui.trees;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.core.runtime.Assert;
import org.eclipse.ui.IMemento;
/**
* The class to describe the tree viewer's state including the visiblity of the
* tree columns and the enablement of the viewer filters.
*/
class TreeViewerState {
// The state of the column's visibility.
private List<ColumnState> columns;
// The state of the filter's enablement.
private List<FilterState> filters;
/**
* Create an instance.
*/
public TreeViewerState() {
columns = Collections.synchronizedList(new ArrayList<ColumnState>());
filters = Collections.synchronizedList(new ArrayList<FilterState>());
}
/**
* Restore the viewer's state using the specified memento.
*
* @param aMemento The memento to restore the viewer's state.
*/
public void restoreState(IMemento aMemento) {
IMemento[] mColumns = aMemento.getChildren("column"); //$NON-NLS-1$
if (mColumns != null && mColumns.length > 0) {
for (IMemento mColumn : mColumns) {
String columnId = mColumn.getString("id"); //$NON-NLS-1$
Assert.isNotNull(columnId);
Boolean value = mColumn.getBoolean("visible"); //$NON-NLS-1$
boolean visible = value != null && value.booleanValue();
Integer integer = mColumn.getInteger("width"); //$NON-NLS-1$
int width = integer.intValue();
integer = mColumn.getInteger("order"); //$NON-NLS-1$
int order = integer.intValue();
ColumnState column = new ColumnState();
column.setColumnId(columnId);
column.setVisible(visible);
column.setWidth(width);
column.setOrder(order);
columns.add(column);
}
}
IMemento[] mFilters = aMemento.getChildren("filter"); //$NON-NLS-1$
if (mFilters != null && mFilters.length > 0) {
for (IMemento mFilter : mFilters) {
String filterId = mFilter.getString("id"); //$NON-NLS-1$
Assert.isNotNull(filterId);
Boolean value = mFilter.getBoolean("enabled"); //$NON-NLS-1$
boolean enabled = value != null && value.booleanValue();
FilterState filter = new FilterState();
filter.setFilterId(filterId);
filter.setEnabled(enabled);
filters.add(filter);
}
}
}
/**
* Save the viewer's state to the specified memento.
*
* @param aMemento The memento to save the viewer's state to.
*/
public void saveState(IMemento aMemento) {
if (columns != null) {
for (ColumnState column : columns) {
String columnId = column.getColumnId();
IMemento mColumn = aMemento.createChild("column"); //$NON-NLS-1$
mColumn.putString("id", columnId); //$NON-NLS-1$
boolean visible = column.isVisible();
mColumn.putBoolean("visible", visible); //$NON-NLS-1$
int width = column.getWidth();
mColumn.putInteger("width", width); //$NON-NLS-1$
int order = column.getOrder();
mColumn.putInteger("order", order); //$NON-NLS-1$
}
}
if (filters != null) {
for (FilterState filter : filters) {
IMemento mFilter = aMemento.createChild("filter"); //$NON-NLS-1$
mFilter.putString("id", filter.getFilterId()); //$NON-NLS-1$
boolean enabled = filter.isEnabled();
mFilter.putBoolean("enabled", enabled); //$NON-NLS-1$
}
}
}
/**
* Add a column state based on the specified column descriptor.
*
* @param column The column's descriptor.
*/
public void addColumn(ColumnDescriptor column) {
ColumnState state = new ColumnState();
state.setColumnId(column.getId());
state.setVisible(column.isVisible());
state.setWidth(column.getWidth());
state.setOrder(column.getOrder());
columns.add(state);
}
/**
* Add a filter state based on the specified filter descriptor.
*
* @param filter The filter's state.
*/
public void addFilter(FilterDescriptor filter) {
FilterState state = new FilterState();
state.setFilterId(filter.getId());
state.setEnabled(filter.isEnabled());
filters.add(state);
}
/**
* Get the column's state in a list.
*
* @return The column's state list.
*/
public List<ColumnState> getColumnStates() {
return columns;
}
/**
* Update the column descriptors using the current column states.
*
* @param columnDescriptors The column descriptors to be updated.
*/
public void updateColumnDescriptor(ColumnDescriptor[] columnDescriptors) {
if (columnDescriptors != null) {
for(int i=0;i<columns.size();i++) {
ColumnDescriptor columnDescriptor = columnDescriptors[i];
ColumnState columnState = columns.get(i);
columnDescriptor.setVisible(columnState.isVisible());
columnDescriptor.setWidth(columnState.getWidth());
columnDescriptor.setOrder(columnState.getOrder());
}
}
}
/**
* Update the filter descriptors using the current filter states.
*
* @param filterDescriptors The filter descriptors to be updated.
*/
public void updateFilterDescriptor(FilterDescriptor[] filterDescriptors) {
if (filterDescriptors != null) {
for (int i=0;i<filters.size();i++) {
FilterDescriptor filterDescriptor = filterDescriptors[i];
FilterState filterState = filters.get(i);
filterDescriptor.setEnabled(filterState.isEnabled());
}
}
}
/**
* Update the current column states using the specified column descriptors.
*
* @param columnDescriptors The column descriptors which are used to update the column states.
*/
public void updateColumnState(ColumnDescriptor[] columnDescriptors) {
if(columnDescriptors != null) {
for(int i=0;i<columns.size();i++) {
ColumnDescriptor columnDescriptor = columnDescriptors[i];
ColumnState columnState = columns.get(i);
columnState.setVisible(columnDescriptor.isVisible());
columnState.setWidth(columnDescriptor.getWidth());
columnState.setOrder(columnDescriptor.getOrder());
}
}
}
/**
* Update the current filter states using the specified filter descriptors.
*
* @param filterDescriptors The filter descriptors which are used to update the filter states.
*/
public void updateFilterState(FilterDescriptor[] filterDescriptors) {
if (filterDescriptors != null) {
for(int i=0;i<filters.size();i++) {
FilterDescriptor filterDescriptor = filterDescriptors[i];
FilterState filterState = filters.get(i);
filterState.setEnabled(filterDescriptor.isEnabled());
}
}
}
}
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