Penjelasan terperinci tentang kotak centang Java Jtree Jcheckbox Tree

Artikel ini membagikan kode spesifik yang ditampilkan di kotak centang Java Jtree Jcheckbox Tree untuk referensi Anda. Konten spesifiknya adalah sebagai berikut

1.Checktreemanager.java

 Public Class Checktreemanager memperluas mouseadapter mengimplementasikan TreeselectionListener {private checktreeselectionModel selectionModel = null; // pohon jtree pribadi = jtree baru (); pohon jtree pribadi = null; int hotspot = new jcheckbox (). getPreferredSize (). width; checktreemanager publik (pohon jtree) {this.tree = pohon; selectionModel = new checktreeselectionModel (tree.getModel ()); Tree.setCellrenderer (Checktreecellrenderer baru (Tree.getCellrenderer (), selectionModel)); Tree.addmouseListener (ini); // Mouse Mendengarkan SelectionModel.AddtreeselectionListener (ini); // Pilihan Pohon Mendengarkan} public void mouseclicked (mouseEvent me) {treepath path = tree.getPathForlocation (me.getx (), me.gety ()); if (path == null) kembali; if (me.getx ()> tree.getpathbounds (path) .x+hotspot) kembali; boolean dipilih = selectionModel.ispathselected (path, true); selectionModel.removetreeselectionListener (ini); coba {if (dipilih) selectionModel.removeselectionPath (path); lain selectionModel.addselectionPath (Path); } akhirnya {selectionModel.addtreeselectionListener (ini); tree.treedidchange (); }} public checktreeselectionModel getSelectionModel () {return selectionModel; } public void valueChanged (TreeselectionEvent e) {Tree.treedidchange (); }}

2.ChecktreeselectionModel.java

 Public Class CheckTreeSelectionModel memperluas defaultTreeselectionModel {Model TreeModel Private; public checktreeselectionModel (model treemoDel) {this.model = model; setSelectionMode (TreeSelectionModel.Discontiguous_tree_selection); } // menguji apakah ada simpul yang tidak dipilih di subtree dari jalur publik yang diberikan boolean dipilih secara terpilih (jalur treepath) {if (isPathSelected (path, true)) mengembalikan false; Treepath [] selectionPaths = getSelectionPaths (); if (selectionPaths == null) return false; untuk (int j = 0; j <selectionpaths.length; j ++) {if (isDescendant (selectionPaths [j], path)) mengembalikan true; } return false; } // Memberitahu apakah jalur yang diberikan dipilih. // Jika Dig benar, maka jalur diasumsikan dipilih, jika // salah satu leluhurnya dipilih. public boolean ispathselected (treepath path, boolean dig) {if (! Dig) mengembalikan super.ispathselected (path); while (path! = null &&! super.ispathselected (path)) path = path.getParentPath (); return path! = null; } // adalah Path1 Keturunan Path2 Private Boolean Isdescendant (Treeepath Path1, Treeepath Path2) {Object Obj1 [] = Path1.getPath (); Objek obj2 [] = path2.getPath (); untuk (int i = 0; i <obj2.length; i ++) {if (obj1 [i]! = obj2 [i]) mengembalikan false; } return true; } public void setSelectionPaths (treepath [] ppaths) {lempar baru unsportedoperationException ("Belum diimplementasikan !!!"); } public void addSelectionPaths (treepath [] Paths) {// Buka semua keturunan jalur [] untuk (int i = 0; i <paths.length; i ++) {treepath path = paths [i]; Treepath [] selectionPaths = getSelectionPaths (); if (selectionPaths == null) break; Arraylist toberemoved = new arraylist (); untuk (int j = 0; j <selectionpaths.length; j ++) {if (isDescendant (selectionPaths [j], path)) toberemoved.add (selectionPaths [j]); } super.removeselectionPaths ((Treeepath []) toberemoved.toarray (treepath baru [0])); } // Jika semua saudara kandung dipilih maka bukalah dan pilih orang tua secara rekursif // Otherwize cukup pilih jalur itu. untuk (int i = 0; i <paths.length; i ++) {jalur treepath = jalur [i]; Treepath Temp = null; while (aresiblingselected (path)) {temp = path; if (path.getParentPath () == null) break; path = path.getParentPath (); } if (temp! = null) {if (temp.getParentPath ()! = null) addSelectionPath (temp.getParentPath ()); else {if (! isSelectionEmpty ()) RemoveSelectionPaths (getSelectionPaths ()); super.addselectionPaths (treepath baru [] {temp}); }} lain super.addselectionPaths (treepath baru [] {path}); }} // Memberitahu apakah semua saudara kandung dari jalur yang diberikan dipilih. private boolean aresiblingsselected (treepath path) {treepath parent = path.getParentPath (); if (Parent == null) mengembalikan true; Objek node = path.getLastPathComponent (); Objek parentNode = parents.getLastPathComponent (); int childcount = model.getChildCount (parentNode); untuk (int i = 0; i <childCount; i ++) {objek childNode = model.getChild (parentNode, i); if (childnode == node) lanjutkan; if (! isPathSelected (Parent.PathByAddingChild (ChildNode))) Return False; } return true; } public void RemoveSelectionPaths (treepath [] Paths) {for (int i = 0; i <paths.length; i ++) {treepath Path = paths [i]; if (path.getPathCount () == 1) super.removeselectionPaths (treepath baru [] {path}); lain toggleremoveselection (jalur); }} // Jika ada node leluhur dari jalur yang diberikan dipilih maka buka saja itu // dan seleksi semua keturunannya kecuali jalur dan keturunan yang diberikan. // sebaliknya buka saja jalur pribadi yang diberikan void toggleremoveselection (jalur treepath) {stack stack = new stack (); Treeepath Parent = Path.getParentPath (); while (Parent! = null &&! isPathSelected (Parent)) {stack.push (Parent); Parent = Parent.getParentPath (); } if (Parent! = null) stack.push (induk); else {super.removeselectionPaths (treepath baru [] {path}); kembali; } while (! stack.isempty ()) {treepath temp = (treepath) stack.pop (); Treeepath peekpath = stack.isempty ()? Path: (Treeepath) Stack.peek (); Objek node = temp.getLastPathComponent (); Objek peeknode = peekpath.getLastPathComponent (); int childcount = model.getChildCount (node); untuk (int i = 0; i <childcount; i ++) {objek childNode = model.getChild (node, i); if (childnode! = peeknode) super.addselectionPaths (treepath baru [] {temp.pathbyaddingchild (childNode)}); }} super.removeselectionPaths (treepath baru [] {parent}); }}

3.Checktreecellrenderer .java

 Public Class Checktreecellrenderer memperluas JPanel mengimplementasikan Treecellrenderer {private checktreeselectionModel selectionModel; Delegasi Private Treecellrenderer; // kotak centang tristatecheckbox pribadi = tristatecheckbox baru (); kotak centang jcheckbox pribadi = jcheckbox baru (); Public Checktreecellrenderer (Delegasi Treecellrenderer, ChecktreeselectionModel SelectionModel) {this.delegate = delegate; this.selectionModel = selectionModel; setLayout (borderlayout baru ()); setOpaque (false); kotak centang.setopaque (false); } komponen publik gettreecellrendererComponent (pohon jtree, nilai objek, boolean dipilih, boolean diperluas, daun boolean, baris int, boolean hasfocus) {component renderer = delegate.gettreecellrendererComponent (value, value, dipilih, diperluas, row, hasfocus); Treepath path = tree.getPathForrow (baris); if (path! = null) {System.out.println (path); if (selectionModel.ispathselected (path, true)) checkbox.setselected (true); else {System.out.println (selectionModel.ispartiyselected (path)); centang kotak. } } Hapus semua(); Tambah (kotak centang, borderlayout.west); add (renderer, borderlayout.center); kembalikan ini; }}

4. Penggunaan

 ChecktreeManager checktreeManager = new checktreemanager (jtree);

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