Hallo zusammen!

Ich wollte den Pfad meines JTree in dem ich mich grad befinde Fett unterlegen, weiss aber nicht wie.

Fett unterlegen kann man mit

 
setFont(getFont().deriveFont(Font.BOLD));

Dann wird jedoch immer nur der selektierte Knoten unterlegt.
Dachte man kommt etwa so an den kompletten Pfad

public TreeNode[] getPathToRoot(TreeNode aNode);

Der Code meiner Klasse:

 
import java.awt.Color; 
import java.awt.Component; 
import java.awt.Font; 
 
import javax.swing.ImageIcon; 
import javax.swing.Icon; 
import javax.swing.JTree; 
import javax.swing.tree.DefaultTreeCellRenderer; 
 
/** 
* The type TreeIconRenderer is responsible for changing the tree icons. 
* 
* @author smokie */ 
 
public class TreeIconRenderer extends DefaultTreeCellRenderer { 
 
// declaring the Icons 
Icon leafIcon; 
ImageIcon openIcon; 
ImageIcon closedIcon; 
 
 
 
public TreeIconRenderer() { 
 
	 super(); 
 
//	 getting image box 
	 leafIcon = new ImageIcon(getClass().getResource("/images/system/box.gif")); 
 
//	 getting image arrow down	 
	 openIcon = new ImageIcon(getClass().getResource("/images/system/arrow_down.gif")); 
 
//	 getting image arrow right	 
	 closedIcon = new ImageIcon(getClass().getResource("/images/system/arrow.gif")); 
 
} 
 
/** 
	* Creating the component in the GridBagLayout. 
	* 
	* @param tree tree 
	* @param value cell value 
	* @param selected closed tree icon 
	* @param expanded opened tree icon 
	* @param leaf end point icon 
	* @param row number of row 
	* @param hasFocus the focus 
	*/ 
public Component getTreeCellRendererComponent( 
				 JTree tree, 
				 Object value, 
				 boolean selected, 
				 boolean expanded, 
				 boolean leaf, 
				 int row, 
				 boolean hasFocus) { 
 
	 super.getTreeCellRendererComponent( 
				 tree, value, selected, 
				 expanded, leaf, row, 
				 hasFocus); 
 
 
 
 
//		 setting icons	 
		 setLeafIcon(leafIcon); 
		 setOpenIcon(openIcon); 
		 setClosedIcon(closedIcon); 
		 setBackgroundSelectionColor(new Color(0, 0, 128)); 
		 putClientProperty("JTree.lineStyle", "None"); 
//		 setFont(getFont().deriveFont(Font.BOLD)); 
		 setBackground(new Color(212, 217, 231)); 
 
 
 
 
	 return this; 
} 
 
}

[pago]

Könnte funktionieren:

import java.awt.Color; 
import java.awt.Component; 
import java.awt.Font; 
 
import javax.swing.ImageIcon; 
import javax.swing.Icon; 
import javax.swing.JTree; 
import javax.swing.tree.DefaultTreeCellRenderer; 
 
/** 
* The type TreeIconRenderer is responsible for changing the tree icons. 
* 
* @author smokie */ 
 
public class TreeIconRenderer extends DefaultTreeCellRenderer { 
 
// declaring the Icons 
Icon leafIcon; 
ImageIcon openIcon; 
ImageIcon closedIcon; 
 
 
 
public TreeIconRenderer() { 
 
	 super(); 
 
//	 getting image box 
	 leafIcon = new ImageIcon(getClass().getResource("/images/system/box.gif")); 
 
//	 getting image arrow down	 
	 openIcon = new ImageIcon(getClass().getResource("/images/system/arrow_down.gif")); 
 
//	 getting image arrow right	 
	 closedIcon = new ImageIcon(getClass().getResource("/images/system/arrow.gif")); 
 
} 
 
/** 
	* Creating the component in the GridBagLayout. 
	* 
	* @param tree tree 
	* @param value cell value 
	* @param selected closed tree icon 
	* @param expanded opened tree icon 
	* @param leaf end point icon 
	* @param row number of row 
	* @param hasFocus the focus 
	*/ 
public Component getTreeCellRendererComponent( 
				 JTree tree, 
				 Object value, 
				 boolean selected, 
				 boolean expanded, 
				 boolean leaf, 
				 int row, 
				 boolean hasFocus) { 
 
	 super.getTreeCellRendererComponent( 
				 tree, value, selected, 
				 expanded, leaf, row, 
				 hasFocus); 
 
 
 
 
//		 setting icons	 
		 setLeafIcon(leafIcon); 
		 setOpenIcon(openIcon); 
		 setClosedIcon(closedIcon); 
		 setBackgroundSelectionColor(new Color(0, 0, 128)); 
		 putClientProperty("JTree.lineStyle", "None"); 
		 TreePath selectionPath = tree.getSelectionPath();
		 TreePath nodePath = ((DefaultTreeModel)tree.getModel()).getPathToRoot((TreeNode)value);
		 if(selectionPath == nodePath || nodePath.isDescentant(selectionPath)) {
		 	setFont(getFont().deriveFont(Font.BOLD));
		 }
		 setBackground(new Color(212, 217, 231)); 
 
 
 
 
	 return this; 
} 
 
}

Danke für deine schnelle Antwort.

Probiere es gleich mal aus.

Bekomme bei

TreePath nodePath = ((DefaultTreeModel)tree.getModel()).getPathToRoot(  (TreeNode)value);

noch ne Fehlermeldung:

Type mismatch: cannot convert from TreeNode[] to TreePath

[pago]

Ändere die Zeile mal zu:

TreePath nodePath = new TreePath(((DefaultTreeModel)tree.getModel()).getPathToRoot((TreeNode)value));

Und das hier:

if(selectionPath == nodePath || nodePath.isDescentant(selectionPath)) {

muss zu dem hier werden:

if(selectionPath.equals(nodePath) || nodePath.isDescentant(selectionPath)) {

java.lang.NullPointerException

at de.weidmueller.view.TreeIconRenderer.getTreeCellRe ndererComponent(TreeIconRenderer.java:7

at javax.swing.plaf.basic.BasicTreeUI$NodeDimensionsH andler.getNodeDimensions(Unknown Source)

at javax.swing.tree.AbstractLayoutCache.getNodeDimens ions(Unknown Source)

at javax.swing.tree.VariableHeightLayoutCache$TreeSta teNode.updatePreferredSize(Unknown Source)

at javax.swing.tree.VariableHeightLayoutCache.rebuild (Unknown Source)

at javax.swing.tree.VariableHeightLayoutCache.setMode l(Unknown Source)

at javax.swing.plaf.basic.BasicTreeUI.setModel(Unknow n Source)

at javax.swing.plaf.basic.BasicTreeUI$PropertyChangeH andler.propertyChange(Unknown Source)

at javax.swing.event.SwingPropertyChangeSupport.fireP ropertyChange(Unknown Source)

at javax.swing.event.SwingPropertyChangeSupport.fireP ropertyChange(Unknown Source)

at javax.swing.JComponent.firePropertyChange(Unknown Source)

at javax.swing.JTree.setModel(Unknown Source)

[Ben]

Was ist denn Zeile 78?

if(selectionPath.equals(nodePath) || nodePath.isDescendant(selectionPath)) {

[pago]

Passiert, wenn es keine Selection gibt.

if(selectionPath != null && (selectionPath.equals(nodePath) || nodePath.isDescendant(selectionPath))) {

Jau jetzt läuft alles ohne fehler.
Jedoch:
Wenn ich das Programm starte und einen Knoten selektiere wird der ganze Tree fett unterlegt, nicht der selektierte Ast.

 setFont(getFont().deriveFont(Font.BOLD));

Hier muss man dem Aufruf irgendwie eintrichtern das er nur speziell den selectionPath BOLD setzt.
Noch irgendeine Idee?
Sonst sehr klug gedacht@DragonMaster

[pago]

Pack doch einfach ein "else" hinzu.
Ich würde die Schrift sowieso irgendwie lokal speichern. Ist sonst zu zeitraubend.

Hey, du bist gut.

Jetzt klappts.

 // setting icons 
setLeafIcon(leafIcon); 
setOpenIcon(openIcon); 
setClosedIcon(closedIcon); 
setBackgroundSelectionColor(new Color(0, 0, 128)); 
putClientProperty("JTree.lineStyle", "None"); 
TreePath selectionPath = tree.getSelectionPath();
TreePath nodePath = new TreePath(((DefaultTreeModel)tree.getModel()).getPathToRoot((TreeNode)value));
if(selectionPath != null && (selectionPath.equals(nodePath) || nodePath.isDescendant(selectionPath))) {
setFont(getFont().deriveFont(Font.BOLD));
 
}
else setFont(getFont().deriveFont(Font.PLAIN));
setBackground(new Color(212, 217, 231));

1000 Dank!!!