Java实现的Windows资源管理器实例
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2024-03-05 19:50:01
本文实例讲述了java实现的windows资源管理器。分享给大家供大家参考。具体如下:
filetree.java文件如下:
// filetree.java...
本文实例讲述了java实现的windows资源管理器。分享给大家供大家参考。具体如下:
filetree.java文件如下:
// filetree.java /*********************************************************** * author: jason * email: tl21cen@hotmail.com * csdn blog: http://blog.csdn.net/unagain/ ***********************************************************/ package tl.exercise.swing; import java.awt.component; import java.io.file; import java.util.vector; import javax.swing.icon; import javax.swing.jtree; import javax.swing.event.treeexpansionevent; import javax.swing.event.treeexpansionlistener; import javax.swing.event.treemodellistener; import javax.swing.event.treeselectionevent; import javax.swing.event.treeselectionlistener; import javax.swing.filechooser.filesystemview; import javax.swing.tree.defaulttreecellrenderer; import javax.swing.tree.treemodel; import javax.swing.tree.treepath; public class filetree extends jtree { static final long serialversionuid = 0; private filelist thelist; public filetree(filelist list) { thelist = list; setmodel(new filesystemmodel(new foldernode())); this.setcellrenderer(new folderrenderer()); addtreeselectionlistener(new treeselectionlistener() { public void valuechanged(treeselectionevent tse) { } }); this.setselectionrow(0); } public void firevaluechanged(treeselectionevent tse) { treepath tp = tse.getnewleadselectionpath(); object o = tp.getlastpathcomponent(); // thelist.firetreeselectionchanged((pathnode)o); thelist.firetreeselectionchanged((foldernode) o); } public void firetreecollapsed(treepath path) { super.firetreecollapsed(path); treepath curpath = getselectionpath(); if (path.isdescendant(curpath)) { setselectionpath(path); } } public void firetreewillexpand(treepath path) { system.out.println("path will expand is " + path); } public void firetreewillcollapse(treepath path) { system.out.println("path will collapse is " + path); } class expansionlistener implements treeexpansionlistener { filetree tree; public expansionlistener(filetree ft) { tree = ft; } public void treecollapsed(treeexpansionevent tee) { } public void treeexpanded(treeexpansionevent tee) { } } } class filesystemmodel implements treemodel { i_filesystem theroot; char filetype = i_filesystem.directory; public filesystemmodel(i_filesystem fs) { theroot = fs; } public object getroot() { return theroot; } public object getchild(object parent, int index) { return ((i_filesystem) parent).getchild(filetype, index); } public int getchildcount(object parent) { return ((i_filesystem) parent).getchildcount(filetype); } public boolean isleaf(object node) { return ((i_filesystem) node).isleaf(filetype); } public int getindexofchild(object parent, object child) { return ((i_filesystem) parent).getindexofchild(filetype, child); } public void valueforpathchanged(treepath path, object newvalue) { } public void addtreemodellistener(treemodellistener l) { } public void removetreemodellistener(treemodellistener l) { } } interface i_filesystem { final public static char directory = 'd'; final public static char file = 'f'; final public static char all = 'a'; public icon geticon(); public i_filesystem getchild(char filetype, int index); public int getchildcount(char filetype); public boolean isleaf(char filetype); public int getindexofchild(char filetype, object child); } /** * a data model for a jtree. this model explorer windows file system directly. * * <p> * perhaps there is a fatal bug with this design. for speed, each of instances * of this model contains file objects of subdirectory, up to now, there isn't * any method to release them until program be end. i'm afraid that the memory * would be full of if the file system is large enough and jvm memery size * setted too small. * * <p> * i won't pay more attention to solve it. it isn't goal of current a exercise. * * @author jason */ class foldernode implements i_filesystem { // private static foldernode theroot; private static filesystemview fsview; private static boolean showhiden = true;; private file thefile; private vector<file> all = new vector<file>(); private vector<file> folder = new vector<file>(); /** * set that whether apply hiden file. * * @param ifshow */ public void setshowhiden(boolean ifshow) { showhiden = ifshow; } public icon geticon() { return fsview.getsystemicon(thefile); } public string tostring() { // return fsview. return fsview.getsystemdisplayname(thefile); } /** * create a root node. by default, it should be the desktop in window file * system. * */ public foldernode() { fsview = filesystemview.getfilesystemview(); thefile = fsview.gethomedirectory(); preparechildren(); } private void preparechildren() { file[] files = fsview.getfiles(thefile, showhiden); for (int i = 0; i < files.length; i++) { all.add(files[i]); if (files[i].isdirectory() && !files[i].tostring().tolowercase().endswith(".lnk")) { folder.add(files[i]); } } } private foldernode(file file) { thefile = file; preparechildren(); } public foldernode getchild(char filetype, int index) { if (i_filesystem.directory == filetype) { return new foldernode(folder.get(index)); } else if (i_filesystem.all == filetype) { return new foldernode(all.get(index)); } else if (i_filesystem.file == filetype) { return null; } else { return null; } } public int getchildcount(char filetype) { if (i_filesystem.directory == filetype) { return folder.size(); } else if (i_filesystem.all == filetype) { return all.size(); } else if (i_filesystem.file == filetype) { return -1; } else { return -1; } } public boolean isleaf(char filetype) { if (i_filesystem.directory == filetype) { return folder.size() == 0; } else if (i_filesystem.all == filetype) { return all.size() == 0; } else if (i_filesystem.file == filetype) { return true; } else { return true; } } public int getindexofchild(char filetype, object child) { if (child instanceof foldernode) { if (i_filesystem.directory == filetype) { return folder.indexof(((foldernode) child).thefile); } else if (i_filesystem.all == filetype) { return all.indexof(((foldernode) child).thefile); } else if (i_filesystem.file == filetype) { return -1; } else { return -1; } } else { return -1; } } } class folderrenderer extends defaulttreecellrenderer { private static final long serialversionuid = 1l; public component gettreecellrenderercomponent(jtree tree, object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasfocus) { i_filesystem node = (i_filesystem) value; icon icon = node.geticon(); setleaficon(icon); setopenicon(icon); setclosedicon(icon); return super.gettreecellrenderercomponent(tree, value, sel, expanded, leaf, row, hasfocus); } }
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