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SWT (JFace) Small production Filebrowser file browsing _java programming

Source: Internet
Author: User
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The code is as follows:


Copy Code code as follows:



Package Swt_jface.demo6;


Import Java.io.File;


Import Java.util.Date;


Import Org.eclipse.jface.resource.ImageRegistry;


Import Org.eclipse.swt.SWT;


Import Org.eclipse.swt.graphics.Image;


Import Org.eclipse.swt.layout.GridData;


Import Org.eclipse.swt.layout.GridLayout;


Import Org.eclipse.swt.program.Program;


Import Org.eclipse.swt.widgets.Display;


Import Org.eclipse.swt.widgets.Shell;


Import org.eclipse.swt.widgets.Table;


Import Org.eclipse.swt.widgets.TableColumn;


Import Org.eclipse.swt.widgets.TableItem;


public class Filebrowser {





Display display = new display ();


Shell shell = new shell (display);


Table table;


File RootDir;


Image iconfolder = new Image (Shell.getdisplay (), "c:/icons/folder.gif");


Image iconfile = new Image (Shell.getdisplay (), "c:/icons/file.gif");





Public Filebrowser () {





GridLayout GridLayout = new GridLayout ();


Shell.setlayout (gridLayout);


Table = new Table (Shell, SWT. BORDER | Swt. Full_selection);


Table.setlinesvisible (TRUE);


Table.setheadervisible (TRUE);


TableColumn tcfilename = new TableColumn (table, SWT. left);


Tcfilename.settext ("File name");


Tcfilename.setimage (New Image (Shell.getdisplay (), "icons/folder.gif"));


TableColumn tcfilesize = new TableColumn (table, SWT. right);


Tcfilesize.settext ("Size");





TableColumn tcdatemodified = new TableColumn (table, SWT. right);


Tcdatemodified.settext ("Date Modified");


Tcfilename.setwidth (200);


Tcfilesize.setwidth (80);


Tcdatemodified.setwidth (180);


Tableitem item = new Tableitem (table, SWT. NULL);


Item.settext (New string[]{"Name", "Size"});


Table.setlayoutdata (New Griddata (Griddata.fill_both));


Table.pack ();





Shell.pack ();


Shell.open ();


Setrootdirectory (New File ("."));





while (!shell.isdisposed ()) {


if (!display.readanddispatch ()) {


Display.sleep ();


}


}


Display.dispose ();


}





private void Setrootdirectory (File dir) {


This.rootdir = dir;


if (! (Dir.exists () && dir.isdirectory ())


throw new IllegalArgumentException ("Invalid directory.");


Table.removeall ();


file[] files = dir.listfiles ();


for (int i=0; files!= null && i < files.length; i++) {


File file = Files[i];


Tableitem item = new Tableitem (table, SWT. NULL);


Item.setbackground (i% 2 = 0 shell.getdisplay (). Getsystemcolor (SWT. Color_white):


Shell.getdisplay (). Getsystemcolor (SWT. Color_gray));


Item.settext (0, File.getname ());


Item.settext (2, New Date (File.lastmodified ()). ToString ());


if (File.isdirectory ()) {


Item.setimage (0, Iconfolder);


}else{


int lastdot = File.getname (). LastIndexOf ('. ');


if (lastdot >= 0 && Lastdot < file.getname (). Length ()) {


Item.setimage (0, GetIcon (file.getname (). substring (lastdot+1)));


}


Long Kbytes = File.length ()/1024;


if (Kbytes = 0)


Kbytes = 1;


Item.settext (1, Kbytes + "KB");


}


}


}





Private Imageregistry imageregistry;





Public Image GetIcon (String extension) {


if (imageregistry = null)


Imageregistry = new Imageregistry ();


Image image = imageregistry.get (extension);


if (image!= null)


return image;


Program program = program.findprogram (extension);


if (program!= null) {


Image = New Image (Shell.getdisplay (), Program.getimagedata ());


Imageregistry.put (extension, image);


}else{


image = IconFile;


}


return image;


}


public static void Main (string[] args) {


New Filebrowser ();


}


}





More examples of table operations:


Copy Code code as follows:



Package Swt_jface.demo6;


Import Org.eclipse.swt.SWT;


Import Org.eclipse.swt.custom.TableEditor;


Import Org.eclipse.swt.graphics.Point;


Import Org.eclipse.swt.graphics.Rectangle;


Import Org.eclipse.swt.layout.FillLayout;


Import Org.eclipse.swt.widgets.Display;


Import org.eclipse.swt.widgets.Event;


Import Org.eclipse.swt.widgets.Listener;


Import Org.eclipse.swt.widgets.Shell;


Import org.eclipse.swt.widgets.Table;


Import Org.eclipse.swt.widgets.TableColumn;


Import Org.eclipse.swt.widgets.TableItem;


Import Org.eclipse.swt.widgets.Text;


public class Main {





public static void Main (string[] args) {





Display display = new display ();


Shell shell = new shell (display);


Shell.setlayout (New Filllayout ());


Final table table = new Table (Shell, SWT. BORDER | Swt. MULTI);


Table.setlinesvisible (TRUE);


for (int i = 0; i < 3; i++) {


TableColumn column = new TableColumn (table, SWT. NONE);


Column.setwidth (100);


}


for (int i = 0; i < 3; i++) {


Tableitem item = new Tableitem (table, SWT. NONE);


Item.settext (new string[] {"" + I, "" + I, "" + i});


}


Final Tableeditor editor = new tableeditor (table);


Editor.horizontalalignment = SWT. Left;


Editor.grabhorizontal = true;


Table.addlistener (SWT. MouseDown, New Listener () {


public void Handleevent (event event) {


Rectangle Clientarea = Table.getclientarea ();


Point pt = new Point (Event.x, EVENT.Y);


int index = Table.gettopindex ();


while (Index < Table.getitemcount ()) {


Boolean visible = false;


Final Tableitem item = table.getitem (index);


for (int i = 0; i < Table.getcolumncount (); i++) {


Rectangle rect = item.getbounds (i);


if (Rect.contains (PT)) {


Final int column = i;


Final text = new text (table, SWT. NONE);


Listener textlistener = new Listener () {


public void Handleevent (final Event e) {


Switch (e.type) {


Case SWT. Focusout:


Item.settext (column, Text.gettext ());


Text.dispose ();


Break


Case SWT. Traverse:


Switch (e.detail) {


Case SWT. Traverse_return:


Item.settext (column, Text.gettext ());


Case SWT. Traverse_escape:


Text.dispose ();


E.doit = false;


}


Break


}


}


};


Text.addlistener (SWT. Focusout, TextListener);


Text.addlistener (SWT. Traverse, TextListener);


Editor.seteditor (text, item, i);


Text.settext (Item.gettext (i));


Text.selectall ();


Text.setfocus ();


Return


}


if (!visible && rect.intersects (Clientarea)) {


Visible = true;


}


}


if (!visible)


Return


index++;


}


}


});


Shell.pack ();


Shell.open ();


while (!shell.isdisposed ()) {


if (!display.readanddispatch ())


Display.sleep ();


}


Display.dispose ();


}


}





The following code is an enhancement to the Filebrowser feature:


Implementation 1:


Filebrowser.java


Copy Code code as follows:



Package Swt_jface.demo7;


Import Java.io.File;


Import org.eclipse.jface.action.Action;


Import Org.eclipse.jface.action.ToolBarManager;


Import Org.eclipse.jface.resource.ImageRegistry;


Import Org.eclipse.swt.SWT;


Import Org.eclipse.swt.custom.TreeEditor;


Import org.eclipse.swt.events.SelectionEvent;


Import Org.eclipse.swt.events.SelectionListener;


Import org.eclipse.swt.events.TreeEvent;


Import Org.eclipse.swt.events.TreeListener;


Import Org.eclipse.swt.graphics.Image;


Import Org.eclipse.swt.graphics.ImageData;


Import Org.eclipse.swt.graphics.Point;


Import Org.eclipse.swt.layout.GridData;


Import Org.eclipse.swt.layout.GridLayout;


Import Org.eclipse.swt.program.Program;


Import Org.eclipse.swt.widgets.DirectoryDialog;


Import Org.eclipse.swt.widgets.Display;


Import org.eclipse.swt.widgets.Event;


Import Org.eclipse.swt.widgets.Listener;


Import Org.eclipse.swt.widgets.Shell;


Import Org.eclipse.swt.widgets.Text;


Import Org.eclipse.swt.widgets.ToolBar;


Import Org.eclipse.swt.widgets.Tree;


Import Org.eclipse.swt.widgets.TreeItem;


public class Filebrowser {





Display display = new display ();


Shell shell = new shell (display);


Tree tree;


File RootDir;


Public Filebrowser () {





Action Actionsetrootdir = new Action ("Set Root Dir") {


public void Run () {


Directorydialog dialog = new Directorydialog (shell);


String path = Dialog.open ();


if (path!= null) {


Setrootdir (new File (path));


}


}


};


ToolBar ToolBar = new ToolBar (Shell, SWT. FLAT);


Toolbarmanager manager = new Toolbarmanager (ToolBar);


Manager.add (Actionsetrootdir);


Manager.update (TRUE);


Shell.setlayout (New GridLayout ());


Tree = new Tree (shell, SWT. BORDER);


Tree.setlayoutdata (New Griddata (Griddata.fill_both));


Setrootdir (New File ("C:/temp"));


Tree.addtreelistener (New Treelistener () {


public void treecollapsed (Treeevent e) {


}


public void treeexpanded (Treeevent e) {


TreeItem item = (TreeItem) e.item;


Treeitem[] Children = Item.getitems ();


for (int i = 0; i < children.length; i++)


if (children[i].getdata () = null)


Children[i].dispose ();


Else


Return


file[] files = ((File) Item.getdata ()). Listfiles ();


for (int i = 0; files!= null && i < files.length; i++)


Addfiletotree (item, files[i]);


}


});


Tree.addselectionlistener (New Selectionlistener () {


public void widgetselected (Selectionevent e) {


}


public void widgetdefaultselected (Selectionevent e) {


TreeItem item = (TreeItem) e.item;


File File = (file) item.getdata ();


if (Program.launch (File.getabsolutepath ())) {


SYSTEM.OUT.PRINTLN ("File has been launched:" + file);


} else {


System.out.println ("Unable to launch file:" + file);


}


}


});


Final Treeeditor editor = new Treeeditor (tree);


Tree.addlistener (SWT. MouseDown, New Listener () {


public void Handleevent (event event) {


Point point = new Point (Event.x, EVENT.Y);


Final TreeItem item = Tree.getitem (point);


if (item = NULL)


Return


Final text = new text (tree, SWT.) NONE);


Text.settext (Item.gettext ());


Text.setbackground (Shell.getdisplay (). Getsystemcolor (SWT. Color_yellow));


Editor.horizontalalignment = SWT. Left;


Editor.grabhorizontal = true;


Editor.seteditor (text, item);


Listener textlistener = new Listener () {


public void Handleevent (final Event e) {


Switch (e.type) {


Case SWT. Focusout:


File renamed =


RenameFile (


(File) Item.getdata (),


Text.gettext ());


if (renamed!= null) {


Item.settext (Text.gettext ());


Item.setdata (renamed);


}


Text.dispose ();


Break


Case SWT. Traverse:


Switch (e.detail) {


Case SWT. Traverse_return:


renamed =


RenameFile (


(File) Item.getdata (),


Text.gettext ());


if (renamed!= null) {


Item.settext (Text.gettext ());


Item.setdata (renamed);


}


Case SWT. Traverse_escape:


Text.dispose ();


E.doit = false;


}


Break


}


}


};


Text.addlistener (SWT. Focusout, TextListener);


Text.addlistener (SWT. Traverse, TextListener);


Text.setfocus ();


}


});





Shell.setsize (400, 260);


Shell.open ();





while (!shell.isdisposed ()) {


if (!display.readanddispatch ()) {


Display.sleep ();


}


}


Display.dispose ();


}


Private file RenameFile (file file, String newName) {


File Dest = new file (File.getparentfile (), newName);


if (File.renameto (dest)) {


return dest;


} else {


return null;


}


}


private void Setrootdir (File root) {


if ((!root.isdirectory ()) | | (!root.exists ()))


throw new IllegalArgumentException ("Invalid root:" + root);


This.rootdir = root;


Shell.settext ("Now browsing:" + Root.getabsolutepath ());


if (Tree.getitemcount () > 0) {


treeitem[] items = Tree.getitems ();


for (int i = 0; i < items.length; i++) {


Items[i].dispose ();


}


}


file[] files = root.listfiles ();


for (int i=0; files!= null && i < files.length; i++)


Addfiletotree (tree, files[i]);


}


private void Addfiletotree (Object parent, file file) {


TreeItem item = NULL;


if (parent instanceof Tree)


item = new TreeItem (tree) parent, SWT. NULL);


else if (parent instanceof TreeItem)


item = new TreeItem (TreeItem) parent, SWT. NULL);


Else


throw New IllegalArgumentException (


"Parent should is a tree or a tree item:" + parent);


Item.settext (File.getname ());


Item.setimage (GetIcon (file));


Item.setdata (file);


if (File.isdirectory ()) {


Recursively adds the children of this file.


file[] files = file.listfiles ();


for (int i=0; i<files.length; i++)


Buildtree (item, files[i]);


if (file.list ()!= null && file.list (). length > 0)


New TreeItem (item, SWT. NULL);


}


}


Private Imageregistry imageregistry;


Image iconfolder = new Image (Shell.getdisplay (), "c:/icons/folder.gif");


Image iconfile = new Image (Shell.getdisplay (), "c:/icons/file.gif");


Private Image GetIcon (file file) {


if (File.isdirectory ())


return iconfolder;


int lastdotpos = File.getname (). IndexOf ('. ');


if (Lastdotpos = = 1)


return iconfile;


Image image = GetIcon (File.getname (). substring (Lastdotpos + 1));


return image = = null? Iconfile:image;


}


Private Image GetIcon (String extension) {


if (imageregistry = null)


Imageregistry = new Imageregistry ();


Image image = imageregistry.get (extension);


if (image!= null)


return image;


Program program = program.findprogram (extension);


ImageData ImageData = (program = = null null:program.getImageData ());


if (ImageData!= null) {


Image = New Image (Shell.getdisplay (), imagedata);


Imageregistry.put (extension, image);


} else {


image = IconFile;


}


return image;


}


public static void Main (string[] args) {


New Filebrowser ();


}


}





Implementation 2:


Filebrowserjface.java


Copy Code code as follows:



Package Swt_jface.demo7;


Import Java.io.File;


Import org.eclipse.jface.action.Action;


Import Org.eclipse.jface.action.ToolBarManager;


Import Org.eclipse.jface.resource.ImageRegistry;


Import org.eclipse.jface.viewers.IStructuredSelection;


Import Org.eclipse.jface.viewers.ITreeContentProvider;


Import Org.eclipse.jface.viewers.LabelProvider;


Import Org.eclipse.jface.viewers.TreeViewer;


Import Org.eclipse.jface.viewers.Viewer;


Import Org.eclipse.jface.viewers.ViewerFilter;


Import Org.eclipse.jface.viewers.ViewerSorter;


Import Org.eclipse.swt.SWT;


Import Org.eclipse.swt.graphics.Image;


Import Org.eclipse.swt.graphics.ImageData;


Import Org.eclipse.swt.layout.GridData;


Import Org.eclipse.swt.layout.GridLayout;


Import Org.eclipse.swt.program.Program;


Import Org.eclipse.swt.widgets.DirectoryDialog;


Import Org.eclipse.swt.widgets.Display;


Import Org.eclipse.swt.widgets.MessageBox;


Import Org.eclipse.swt.widgets.Shell;


Import Org.eclipse.swt.widgets.ToolBar;


public class Filebrowserjface {





Display display = new display ();


Shell shell = new shell (display);





File RootDir;


Treeviewer Treeviewer;


Public Filebrowserjface () {


Action Actionsetrootdir = new Action ("Set Root Dir") {


public void Run () {


Directorydialog dialog = new Directorydialog (shell);


String path = Dialog.open ();


if (path!= null) {


Treeviewer.setinput (new File (path));


}


}


};


Final Viewerfilter directoryfilter = new Viewerfilter () {


public Boolean Select (


Viewer Viewer,


Object parentelement,


Object Element) {


Return ((File) Element). Isdirectory ();


}


};


Action actionshowdirectoriesonly = new Action ("Show Directories only") {


public void Run () {


if (! ischecked ())


Treeviewer.removefilter (Directoryfilter);


Else


Treeviewer.addfilter (Directoryfilter);


}


};


Actionshowdirectoriesonly.setchecked (FALSE);


Action Actiondeletefile = new Action ("Delete the selected file") {


public void Run () {


Istructuredselection selection = (istructuredselection) treeviewer.getselection ();


File File = (file) selection.getfirstelement ();


if (file = = null) {


SYSTEM.OUT.PRINTLN ("Please select a file a");


Return


}


MessageBox MessageBox = new MessageBox (Shell, SWT. YES | swt.no);


Messagebox.setmessage ("Are you sure to delete file:" + file.getname () + "?");


if (messagebox.open () = SWT. YES) {


File parentfile = File.getparentfile ();


if (File.delete ()) {


System.out.println ("File has been deleted.");


Notifies the viewer for update.


Treeviewer.refresh (Parentfile, false);


}else{


System.out.println ("Unable to delete file.");


}


}


}


};


ToolBar ToolBar = new ToolBar (Shell, SWT. FLAT);


Toolbarmanager manager = new Toolbarmanager (ToolBar);


Manager.add (Actionsetrootdir);


Manager.add (actionshowdirectoriesonly);


Manager.add (Actiondeletefile);


Manager.update (TRUE);





Shell.setlayout (New GridLayout ());


Treeviewer = new Treeviewer (Shell, SWT. BORDER);


Treeviewer.gettree (). Setlayoutdata (New Griddata (Griddata.fill_both));


Treeviewer.setcontentprovider (New Itreecontentprovider () {


Public object[] GetChildren (Object parentelement) {


file[] files = ((File) parentelement). Listfiles ();


if (Files = null)


return new object[0];


return files;


}


public object GetParent (object element) {


Return ((File) Element). Getparentfile ();


}


public boolean HasChildren (Object element) {


File File = (file) element;


file[] files = file.listfiles ();


if (Files = null | | files.length = 0)


return false;


return true;


}


Public object[] GetElements (Object inputelement) {


file[] files = ((File) inputelement). Listfiles ();


if (Files = null)


return new object[0];


return files;


}


public void Dispose () {


}


public void inputchanged (


Viewer Viewer,


Object Oldinput,


Object newinput) {


Shell.settext ("Now browsing:" + newinput);


}


});





Treeviewer.setlabelprovider (New Labelprovider () {


Public Image GetImage (Object Element) {


Return GetIcon ((File) element);


}


Public String GetText (Object Element) {


Return ((File) Element). GetName ();


}


});


Treeviewer.setsorter (New Viewersorter () {


public int category (Object element) {


File File = (file) element;


if (File.isdirectory ())


return 0;


Else


return 1;


}


});








Treeviewer.setinput (New File ("C:/temp"));


Shell.setsize (400, 260);


Shell.open ();





while (!shell.isdisposed ()) {


if (!display.readanddispatch ()) {


Display.sleep ();


}


}


Display.dispose ();


}


Private file RenameFile (file file, String newName) {


File Dest = new file (File.getparentfile (), newName);


if (File.renameto (dest)) {


return dest;


} else {


return null;


// }


// }


Private Imageregistry imageregistry;


Image iconfolder = new Image (Shell.getdisplay (), "c:/icons/folder.gif");


Image iconfile = new Image (Shell.getdisplay (), "c:/icons/file.gif");


Private Image GetIcon (file file) {


if (File.isdirectory ())


return iconfolder;


int lastdotpos = File.getname (). IndexOf ('. ');


if (Lastdotpos = = 1)


return iconfile;


Image image = GetIcon (File.getname (). substring (Lastdotpos + 1));


return image = = null? Iconfile:image;


}


Private Image GetIcon (String extension) {


if (imageregistry = null)


Imageregistry = new Imageregistry ();


Image image = imageregistry.get (extension);


if (image!= null)


return image;


Program program = program.findprogram (extension);


ImageData ImageData = (program = = null null:program.getImageData ());


if (ImageData!= null) {


Image = New Image (Shell.getdisplay (), imagedata);


Imageregistry.put (extension, image);


} else {


image = IconFile;


}


return image;


}





public static void Main (string[] args) {


New Filebrowserjface ();


}


}


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