// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.gui.preferences.imagery;
import static org.openstreetmap.josm.tools.I18n.tr;
import java.awt.Component;
import java.util.LinkedList;
import java.util.List;
import javax.swing.JOptionPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.MutableTreeNode;
import javax.swing.tree.TreePath;
import org.openstreetmap.josm.io.imagery.WMSImagery;
/**
* The layer tree of a WMS server.
*/
public class WMSLayerTree {
private final MutableTreeNode treeRootNode = new DefaultMutableTreeNode();
private final DefaultTreeModel treeData = new DefaultTreeModel(treeRootNode);
private final JTree layerTree = new JTree(treeData);
private final List<WMSImagery.LayerDetails> selectedLayers = new LinkedList<>();
private boolean previouslyShownUnsupportedCrsError;
/**
* Returns the root node.
* @return The root node
*/
public MutableTreeNode getTreeRootNode() {
return treeRootNode;
}
/**
* Returns the {@code JTree}.
* @return The {@code JTree}
*/
public JTree getLayerTree() {
return layerTree;
}
/**
* Returns the list of selected layers.
* @return the list of selected layers
*/
public List<WMSImagery.LayerDetails> getSelectedLayers() {
return selectedLayers;
}
/**
* Constructs a new {@code WMSLayerTree}.
*/
public WMSLayerTree() {
layerTree.setCellRenderer(new LayerTreeCellRenderer());
layerTree.addTreeSelectionListener(new WMSTreeSelectionListener());
}
void addLayersToTreeData(MutableTreeNode parent, List<WMSImagery.LayerDetails> layers) {
for (WMSImagery.LayerDetails layerDetails : layers) {
DefaultMutableTreeNode treeNode = new DefaultMutableTreeNode(layerDetails);
addLayersToTreeData(treeNode, layerDetails.children);
treeData.insertNodeInto(treeNode, parent, 0);
}
}
/**
* Updates the whole tree with the given WMS imagery info.
* @param wms The imagery info for a given WMS server
*/
public void updateTree(WMSImagery wms) {
treeRootNode.setUserObject(wms.getServiceUrl().getHost());
updateTreeList(wms.getLayers());
}
/**
* Updates the list of WMS layers.
* @param layers The list of layers to add to the root node
*/
public void updateTreeList(List<WMSImagery.LayerDetails> layers) {
addLayersToTreeData(getTreeRootNode(), layers);
getLayerTree().expandRow(0);
getLayerTree().expandRow(1);
}
private static class LayerTreeCellRenderer extends DefaultTreeCellRenderer {
@Override
public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean sel, boolean expanded, boolean leaf, int row,
boolean hasFocus) {
super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf,
row, hasFocus);
DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) value;
Object userObject = treeNode.getUserObject();
if (userObject instanceof WMSImagery.LayerDetails) {
WMSImagery.LayerDetails layer = (WMSImagery.LayerDetails) userObject;
setEnabled(layer.isSupported());
}
return this;
}
}
private class WMSTreeSelectionListener implements TreeSelectionListener {
@Override
public void valueChanged(TreeSelectionEvent e) {
TreePath[] selectionRows = layerTree.getSelectionPaths();
if (selectionRows == null) {
return;
}
selectedLayers.clear();
for (TreePath i : selectionRows) {
Object userObject = ((DefaultMutableTreeNode) i.getLastPathComponent()).getUserObject();
if (userObject instanceof WMSImagery.LayerDetails) {
WMSImagery.LayerDetails detail = (WMSImagery.LayerDetails) userObject;
if (!detail.isSupported()) {
layerTree.removeSelectionPath(i);
if (!previouslyShownUnsupportedCrsError) {
JOptionPane.showMessageDialog(null, tr("That layer does not support any of JOSM''s projections,\n" +
"so you can not use it. This message will not show again."),
tr("WMS Error"), JOptionPane.ERROR_MESSAGE);
previouslyShownUnsupportedCrsError = true;
}
} else if (detail.ident != null) {
selectedLayers.add(detail);
}
}
}
layerTree.firePropertyChange("selectedLayers", /*dummy values*/ false, true);
}
}
}