Develop Reference

Creating filter with multiple file name

I wanted to create filter in java for browse file dialogue it should allow only either abc.exe or xyz.exe
I am using swt.widgets.FileDialog
currently I am filtering for *.exe with following string
String[] extensionFilter = { "*.exe" };
fileDialog .setFilterExtensions(extensionFilter);
How can I change this to allow only only abc.exe xyz.exe?
It should search for abc.exe and xyz.exe
example: When you allow multiple extensions(.exe,.dat) it will search for all files with that(.exe,.dat) extensions similarly I want to search for abc.exe and xyz.exe
Thanks in advance

You can use setFilterExtension(String[]), however you have to know how to format the String:
public static void main(String[] args)
{
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("StackOverflow");
shell.setLayout(new FillLayout());
Button button = new Button(shell, SWT.PUSH);
button.setText("Choose");
button.addListener(SWT.Selection, new Listener()
{
#Override
public void handleEvent(Event arg0)
{
FileDialog dialog = new FileDialog(shell);
dialog.setFilterExtensions(new String[] { "abc.exe;xyz.exe" });
System.out.println(dialog.open());
}
});
shell.pack();
shell.open();
while (!shell.isDisposed())
{
if (!display.readAndDispatch())
{
display.sleep();
}
}
display.dispose();
}
The single String "abc.exe;xyz.exe" tells it that both these are allowed.

Try this
String[] extensionFilter = { "abc.exe","xyz.exe" };

You can use setFilterNames
Which is explained here
It allows String type array variable only. No need to bother about regEx
String[] extensionFilter = { "abc.exe;xyz.exe" };
fileDialog.setFilterExtensions( extensionFilter );

SWT Spinner - Disabling Keyboard Editing

On SWT spinner (or maybe some other similar SWT widget), how can I force the user to use the UI buttons instead of edit the text from the keyboard. thanks.

SWT.READ_ONLY will prevent the user from entering values. To disable arrow keys as well, you can do something like this:
public static void main(String args[])
{
Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("StackOverflow");
shell.setLayout(new FillLayout());
Spinner spinner = new Spinner(shell, SWT.READ_ONLY);
spinner.addListener(SWT.Verify, new Listener()
{
#Override
public void handleEvent(Event e)
{
if(e.keyCode == SWT.ARROW_UP || e.keyCode == SWT.ARROW_DOWN)
{
e.doit = false;
}
}
});
shell.pack();
shell.setSize(100, shell.computeSize(SWT.DEFAULT, SWT.DEFAULT).y);
shell.open();
while (!shell.isDisposed())
{
if (!shell.getDisplay().readAndDispatch())
shell.getDisplay().sleep();
}
}
This will make sure that the only way to change the Spinner value is using the buttons.

Hide ON_TOP shell in SWT on Display minimimized

I'm trying to hide a SWT shell when the Display is minimized. I'm missing something and would be most thankful for any help.
Additional Info: This shell is actually a popup that gets drawn when the user clicks on a composite. In the end, my goal is to hide this popup-shell when the composite is not visible (user minimized the window or switched between windows, say with Alt+Tab for example).
Here's my code:
static Shell middleClickNodeInfoShell ;
static Label nodeIdLabel ;
void init(){
...
/** Focused node on middle click*/
middleClickNodeInfoShell = new Shell(Display.getDefault(), SWT.BORDER | SWT.MODELESS);
middleClickNodeInfoShell.setLayoutData(new GridData(GridData.FILL, GridData.BEGINNING, true, false));
middleClickNodeInfoShell.setLayout(createNoMarginLayout(1, false));
nodeIdLabel = new Label(middleClickNodeInfoShell, SWT.NONE);
Display.getDefault().addListener(SWT.Iconify,new Listener() {
#Override
public void handleEvent(Event arg0) {
// TODO Auto-generated method stub
middleClickNodeInfoShell.setVisible(false);
}
});
}
#Override
public boolean onMouseClicked(Button button, ScreenPosition screenPos,
final GeoPosition arg2) {
...
nodeIdLabel.setText("Node Id: "+node.getId());
middleClickNodeInfoShell.setLocation(pos.getX()+displayX,pos.getY()+displayY+30);
middleClickNodeInfoShell.setVisible(true);
middleClickNodeInfoShell.pack();
}

Here is sample code that will help you do figure out what you are looking for
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setSize(300, 200);
shell.setText("Shell Example");
shell.setLayout(new RowLayout());
final Button button = new Button(shell, SWT.PUSH);
button.setText("Click Me");
final Shell tip = new Shell(shell,SWT.MODELESS);
tip.setLayout(new FillLayout());
Label lbl = new Label(tip, SWT.NONE);
lbl.setText("***tooltip***");
tip.pack();
shell.addControlListener(new ControlListener() {
#Override
public void controlResized(ControlEvent e) {
changeTipLocation(display, button, tip);
}
#Override
public void controlMoved(ControlEvent e) {
changeTipLocation(display, button, tip);
}
});
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
changeTipLocation(display, button, tip);
tip.open();
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
private static void changeTipLocation(final Display display, final Button button, final Shell tip) {
Rectangle bounds = button.getBounds();
Point loc = button.getLocation();
tip.setLocation(display.map(button, null, new Point(loc.x+bounds.width, loc.y+bounds.height)));
}

Java - SWTBot test wizard without workbench

I created an eclipse wizard which i want to test now with the SWTBot. I already used the SWTWorkbenchBot which finally works but i want to test the wizard now without the eclipse workbench. Thats why i created a shell in my testclass where i want to put on my wizardpage, but all i could see, was a empty shell without my wizardPage.
So i created a new shell class which included this code:
public static void main(String args[]) {
try {
Display display = Display.getDefault();
HorrorShell shell = new HorrorShell(display);
shell.open();
shell.layout();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
/**
* Create the shell.
*
* #param display
*/
public HorrorShell(Display display) {
super(display, SWT.SHELL_TRIM);
setLayout(new FillLayout());
createContents();
}
/**
* Create contents of the shell.
*/
protected void createContents() {
setText("SWT Application");
setSize(450, 300);
ManualSettingsWizardPage page = new ManualSettingsWizardPage();
page.createControl(this);
}
With the shell class it works, my wizardpage was shown but if i try to run my testclass as SWTBotTest or as JUnitTest it wont show me anything but a empty shell.
Here's the code in my testclass:
private ManualSettingsWizardPage wizard;
private SWTBotShell botShell;
private Shell shell;
private Display display;
private SWTBot bot;
#Before
public void setUp() {
botShell = new SWTBotShell(shell);
bot = new SWTBot();
wizard = new ManualSettingsWizardPage();
display = Display.getDefault();
shell = new Shell(display);
shell.open();
shell.layout();
}
#Test
public void bot() throws Exception {
bot = botShell.bot();
shell.setBounds(200, 200, 400, 400);
shell.setLayout(new FillLayout());
wizard.createControl(shell);
}

I think your problem stems from the fact that you are creating GUI components from the SWTBot-Thread. They should be created by the UIThread, though.
Normally, you'd test some plugin which would open a wizard as the result of choosing an action, e.g. "new xyz". First step would be to put your wizard code into a plugin and register a new action that would fire up the wizard. then you could try finding the shell with SWTBot and executing the desired actions.

Display parent modal dialog with SWT

AWT/Swing allows to show application modal (blocking the whole application) and parent modal (blocking only the parents) dialogs. How can I achieve the same with SWT?

In order to block the whole application, you can create the dialog Shell with the style SWT.APPLICATION_MODAL, open it, and then pump the UI events until the shell is disposed:
Display display = Display.getDefault();
Shell dialogShell = new Shell(display, SWT.APPLICATION_MODAL);
// populate dialogShell
dialogShell.open();
while (!dialogShell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
If you want to block input only to the parent, try using the style SWT.PRIMARY_MODAL, though the Javadocs specify (as for the other modal styles) that this is a hint; i.e., that different SWT implementations may not exactly handle it the same way. Likewise, I don't know of an implementation that would honor the SWT.SYSTEM_MODAL style.
UPDATE: Answer to first comment
If you have two or more primary modals open at the same time, you cannot use the tricks to pump the events until the modal is closed, as they could be closed in any order. The code will run, but execution will resume after the while loop after the current dialog is closed and all other such dialogs that have been opened after it. In this case, I would register a DisposeListener on each dialog to get a callback when they are closed. Something like this:
void run() {
Display display = new Display();
Shell shell1 = openDocumentShell(display);
Shell shell2 = openDocumentShell(display);
// close both shells to exit
while (!shell1.isDisposed() || !shell2.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
Shell openDocumentShell(final Display display) {
final Shell shell = new Shell(display, SWT.SHELL_TRIM);
shell.setLayout(new FillLayout());
Button button = new Button(shell, SWT.PUSH);
button.setText("Open Modal Dialog");
button.addSelectionListener(new SelectionAdapter() {
#Override
public void widgetSelected(SelectionEvent e) {
System.out.println("Button pressed, about to open modal dialog");
final Shell dialogShell = new Shell(shell, SWT.PRIMARY_MODAL | SWT.SHEET);
dialogShell.setLayout(new FillLayout());
Button closeButton = new Button(dialogShell, SWT.PUSH);
closeButton.setText("Close");
closeButton.addSelectionListener(new SelectionAdapter() {
#Override
public void widgetSelected(SelectionEvent e) {
dialogShell.dispose();
}
});
dialogShell.setDefaultButton(closeButton);
dialogShell.addDisposeListener(new DisposeListener() {
#Override
public void widgetDisposed(DisposeEvent e) {
System.out.println("Modal dialog closed");
}
});
dialogShell.pack();
dialogShell.open();
}
});
shell.pack();
shell.open();
return shell;
}