Let's say I have 2 views(A,B) detached. View A on top of view B on top of workbench shell.
Question 1:
How to let user click at a view to make it on top?
Question 2:
Now I use a window of other app, say, notepad, to cover view A.
Is it possible to let user just click at view A to flip it on top of the notepad while keeping view B and the main behind notepad?
Thanks for all your answer
I did some dirty work finally:
<extension
point="org.eclipse.ui.internalTweaklets">
<tweaklet
definition="org.eclipse.ui.internal.tweaklets.WorkbenchImplementation"
description="Customized Detached View"
id="id1"
implementation="tweaklets.WorkbenchImplementation"
name="Customized Detached View">
</tweaklet>
</extension>
My WorkbenchImplementation.java
public class WorkbenchImplementation extends Workbench3xImplementation {
private static final Logger logger = LoggerFactory.getLogger(WorkbenchImplementation.class);
#Override
public WorkbenchWindow createWorkbenchWindow(int newWindowNumber) {
// return super.createWorkbenchWindow(newWindowNumber);
return new WorkbenchWindow(newWindowNumber) {
#Override
protected void configureShell(Shell shell) {
super.configureShell(shell);
try {
Field field = WorkbenchWindow.class.getDeclaredField("detachedWindowShells");
field.setAccessible(true);
field.set(this, createShellPool(shell));
} catch (Exception e) {
logger.error("Error tweaking WorkbenchWindow", e);
}
}
};
}
protected ShellPool createShellPool(Shell shell) {
// return new ShellPool(null, SWT.TOOL | SWT.TITLE | SWT.MAX | SWT.RESIZE | Window.getDefaultOrientation());
return new ShellPool(null, SWT.NO_TRIM | Window.getDefaultOrientation());
}
}
There are not general answer to this question. The behavior of the window manager depends a lot on the native window manager. E.g. Windows 7 and OSX behaves differently.
Related
I've started working with the new navigation component and I'm really digging it! I do have one issue though - How am I supposed to handle the back button when I'm at the starting destination of the graph?
This is the code I'm using now:
findNavController(this, R.id.my_nav_host_fragment)
.navigateUp()
When I'm anywhere on my graph, it's working great, it send me back, but when I'm at the start of it - the app crashes since the backstack is empty.
This all makes sense to me, I'm just not sure how to handle it.
While I can check if the current fragment's ID is the same as the one that I know to be the root of the graph, I'm looking for a more elegant solution like some bool flag of wether or not the current location in the graph is the starting location or not.
Ideas?
I had a similar scenario where I wanted to finish the activity when I was at the start destination and do a regular 'navigateUp' when I was further down the navigation graph. I solved this through a simple extension function:
fun NavController.navigateUpOrFinish(activity: AppCompatActivity): Boolean {
return if (navigateUp()) {
true
} else {
activity.finish()
true
}
}
And then call it like:
override fun onSupportNavigateUp() =
findNavController(R.id.nav_fragment).navigateUpOrFinish(this)
However I was unable to use NavigationUI as this would hide the back arrow whenever I was at the start destination. So instead of:
NavigationUI.setupActionBarWithNavController(this, controller)
I manually controlled the home icon:
setSupportActionBar(toolbar)
supportActionBar?.setDisplayHomeAsUpEnabled(true)
supportActionBar?.setHomeAsUpIndicator(R.drawable.ic_navigation_back)
Override onBackPressed in your activity and check if the current destination is the start destination or not.
Practically it looks like this:
#Override
public void onBackPressed() {
if (Navigation.findNavController(this,R.id.nav_host_fragment)
.getCurrentDestination().getId() == R.id.your_start_destination) {
// handle back button the way you want here
return;
}
super.onBackPressed();
}
You shouldn't override "onBackPressed", you should override "onSupportNavigateUp" and put there
findNavController(this, R.id.my_nav_host_fragment)
.navigateUp()
From the official documentation:
You will also overwrite AppCompatActivity.onSupportNavigateUp() and call NavController.navigateUp
https://developer.android.com/topic/libraries/architecture/navigation/navigation-implementing
In Jetpack Navigation Component, if you want to perform some operation when fragment is poped then you need to override following functions.
Add OnBackPressedCallback in fragment to run your special operation when back present in system navigation bar at bottom is pressed .
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
onBackPressedCallback = object : OnBackPressedCallback(true) {
override fun handleOnBackPressed() {
//perform your operation and call navigateUp
findNavController().navigateUp()
}
}
requireActivity().onBackPressedDispatcher.addCallback(onBackPressedCallback)
}
Add onOptionsItemMenu in fragment to handle back arrow press present at top left corner within the app.
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
setHasOptionsMenu(true)
}
override fun onOptionsItemSelected(item: MenuItem): Boolean {
if (item.itemId == android.R.id.home) {
//perform your operation and call navigateUp
findNavController().navigateUp()
return true
}
return super.onOptionsItemSelected(item)
}
If there is no special code to be run when back is pressed on host fragment then use onSupportNavigateUp in Activity.
override fun onSupportNavigateUp(): Boolean {
if (navController.navigateUp() == false){
//navigateUp() returns false if there are no more fragments to pop
onBackPressed()
}
return navController.navigateUp()
}
Note that onSupportNavigateUp() is not called if the fragment contains onOptionsItemSelected()
As my back button works correctly, and using NavController.navigateUp() crashed on start destination back button. I have changed this code to something like this. Other possibility will be to just check if currentDestination == startDestination.id but I want to close Activity and go back to other Activity.
override fun onSupportNavigateUp() : Boolean {
//return findNavController(R.id.wizard_nav_host_fragment).navigateUp()
onBackPressed()
return true
}
/** in your activity **/
private boolean doubleBackToExitPressedOnce = false;
#RequiresApi(api = Build.VERSION_CODES.M)
#Override
public void onBackPressed() {
int start = Navigation.findNavController(this, R.id.nav_host_fragment).getCurrentDestination().getId();
if (start == R.id.nav_home) {
if (doubleBackToExitPressedOnce) {
super.onBackPressed();
return;
}
this.doubleBackToExitPressedOnce = true;
Toast.makeText(MainActivity.this, "Press back again to exits", Toast.LENGTH_SHORT).show();
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
doubleBackToExitPressedOnce = false;
}
}, 2000);
} else {
super.onBackPressed();
}
}
If you mean the start of your "root" navigation graph (just incase you have nested navigation graphs) then you shouldn't be showing an up button at all, at least according to the navigation principles.
Just call this in your back button Onclick
requireActivity().finish()
I am Trying to add a dropListener so I can Drop and text into a draw2d Label ,in GEf Editor , Can anyone help how Can I do that. An example will be great.
To respond to drop events on a GEF edit part viewer you have to install on the viewer itself an implementation of org.eclipse.jface.util.TransferDropTargetListener that understands transfers of type org.eclipse.swt.dnd.TextTransfer and that creates some kind of org.eclipse.gef.Request that can be handled by an org.eclipse.gef.EditPolicy installed on the target org.eclipse.gef.EditPart.
You have to understand that both the Request and the EditPolicy allow you to customize the drop behavior on a EditPart basis. As a consequence, I can show you an example that is actually fully functional, but feel free to customize it to your real needs.
First create the TransferDropTargetListener:
public class TextTransferDropTargetListener extends AbstractTransferDropTargetListener {
public TextTransferDropTargetListener(EditPartViewer viewer) {
super(viewer, TextTransfer.getInstance());
}
#Override
protected void handleDragOver() {
getCurrentEvent().feedback = DND.FEEDBACK_SCROLL | DND.FEEDBACK_EXPAND;
super.handleDragOver();
}
#Override
protected Request createTargetRequest() {
return new ChangeBoundsRequest(REQ_ADD);
}
#Override
protected void updateTargetRequest() {
ChangeBoundsRequest request = (ChangeBoundsRequest) getTargetRequest();
request.setEditParts(Collections.EMPTY_LIST);
request.setLocation(getDropLocation());
}
#Override
protected void handleDrop() {
super.handleDrop();
if (getCurrentEvent().detail != DND.DROP_NONE) {
getViewer().setSelection(StructuredSelection.EMPTY);
getViewer().getControl().setFocus();
}
}
#Override
protected Command getCommand() {
String text = (String) getCurrentEvent().data;
List<IEntityPart> editParts = new ArrayList<IEntityPart>();
//
// using the 'text' variable you have to create
// a new EditPart that would eventually replace the old one.
//
editParts.add(createNewLabelPart());
ChangeBoundsRequest request = (ChangeBoundsRequest) getTargetRequest();
request.setEditParts(editParts);
return super.getCommand();
}
}
then install the listener in the graphical viewer constructor using the following statement:
addDropTargetListener(new TextTransferDropTargetListener(this));
finally ensure that an EditPolicy that understands requests of type REQ_ADD (maybe you already added one that extends LayoutEditPolicy or ContainerEditPolicy) is installed on the target EditPart, which is usually done in the AbstractEditPart.createEditPolicies().
To better understand the chain of responsibilities, I suggest you to have a look at the super implementation of the TransferDropTargetListener.getCommand() method.
I use codenameone to develop my mobile application. In this application I implement some classes and codes manually for instance create all forms by hard coding not using codenameone designer for some reason.
By the way I wanted to navigate in forms like what codenameone use, so I use one variable from type of Form called it prevForm and when I want to open a form I set it to current form and then I show new form.
Ok, that is main scenario. In this application I wanna implement internationalization too, so I create my own hashtable (Farsi and English) for this application.
This is my problem:
How can I set or change language and apply it to forms that I opened?
Is my method for navigate between forms are good?
Here is my code:
public class BaseForm extends Form implements ActionListener {
public BaseForm(){
this.setLayout(new BoxLayout(BoxLayout.Y_AXIS));
}
Command exit, ok, back;
Form prevForm;
protected void initForm(){
}
protected void showForm(){
}
protected void showForm(final Form prevForm){
//String name = this.getName();
//if("Reminder".equals(name) || "3Transaction".equals(name))
{
this.prevForm = prevForm;
Form f = this;
back = new Command("Back");
//ok = new Command("Ok");
//delete = new Command("Delete");;
Button button = new Button("Button");
f.addCommand(back);
//f.addCommand(ok);
//f.addCommand(delete);
//f.addComponent(button);
f.addCommandListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
if (ae.getCommand().equals(back)) {
//Do Exit command code
System.out.println("Back pressed");
prevForm.showBack();
} else if (ae.getCommand().equals(ok)) {
//Do Start command code
System.out.println("Ok pressed");
}
}
});
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
//Do button code
System.out.println("Action performed");
}
});
}
showForm();
}}
for open nested form I use this code:
LanguageUI lang = new LanguageUI();
lang.showForm(this);
change language [form]:
protected boolean onBtnSave() {
if(isRbFarsiSelected()){
UIManager.getInstance().setResourceBundle(new CommonSettings().getFarsi());
}
else {
UIManager.getInstance().setResourceBundle(new CommonSettings().getEnglish());
}
return false;
}
I also hard code my UI on lwuit, and i have a variable parentForm on every class so i can easily show previous form. For language change i know there is Localization in the resource editor that you can make use of. Below is how you can access it. I guess the trick is how to set the content of the L10N in the res file in code? On the other hand you can create your own helper classes that mirror the methods below.
Resources theme = Resources.open("/theme.res");
theme.getL10N(id, locale);
theme.getL10NResourceNames();
theme.isL10N(name);
theme.listL10NLocales(id)
On OS X, users expect to be able to press Cmd-W to close a window.
Can I configure a JFrame to do this?
Typically, keybindings for the top-level windows are handled exclusively by the underlying OS. So on a Mac they should be already there, on a different system there is no meta key (? not sure, though, maybe has some simulation).
Anyway, you can add whatever additional keybinding you like to the JFrame's rootPane:
private void addMacCloseBinding(JFrame frame) {
frame.getRootPane().getActionMap().put("close-window", new CloseAction(frame));
frame.getRootPane().getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
.put(KeyStroke.getKeyStroke("control W"), "close-window");
frame.getRootPane().getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
.put(KeyStroke.getKeyStroke("meta W"), "close-window");
}
public class CloseAction extends AbstractAction {
private Window window;
public CloseAction(Window window) {
this.window = window;
}
#Override
public void actionPerformed(ActionEvent e) {
if (window == null) return;
window.dispatchEvent(new WindowEvent(
window, WindowEvent.WINDOW_CLOSING));
}
}
You should be able to specify the menu shortcut like this:
menuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_W,
ActionEvent.META_MASK));
I've built a log-in composite that I am displaying in my application entry-point to the user. Upon entry of the username and password, I am sending the username and password to the server via a RemoteService and will receive back an object containing the ClientSession. If the ClientSession is a valid object (recognised username and password), I wish to display the main application panel otherwise I want to display the login dialog again (with an error message).
My question is, that during the async call to the server, how to I mask the screen so that the user cannot click anything whilst the Session is obtained from the server?
I know that the login should be fast, but the Session object contains a lot of Client Side cached values for the current user that is used to generate the main panel. This may take a fraction of a second or up to 5 seconds (I can't control the speed of the underlying infrastructure unfortunately) so I want to mask the screen until a timeout is reached then allow the user to try again.
I have done this exact operation before using GWT Ext, but vanilla GWT seems to have a lot less samples unfortunately.
Thanks
Chris
The GWT class PopupPanel has an optional "glass panel" that blocks interaction with the page underneath.
final PopupPanel popup = new PopupPanel(false, true); // Create a modal dialog box that will not auto-hide
popup.add(new Label("Please wait"));
popup.setGlassEnabled(true); // Enable the glass panel
popup.center(); // Center the popup and make it visible
You might want to check out GlassPanel from the GWT Incubator project. AFAICT it's not perfect, but should be of some help nevertheless ;)
You can also use a dialog box for this purpose.
Here is the code how to use it.
public class NTMaskAlert extends DialogBox {
private String displayText;
private String message;
private static NTMaskAlert alert;
Label lable;
private NTMaskAlert(String text) {
setText(text);
setWidget(new Image(GWT.getModuleBaseURL()
+ "/images/ajax-loader_1.gif"));
setGlassEnabled(true);
setAnimationEnabled(true);
super.show();
super.center();
WorkFlowSessionFactory.putValue(WorkFlowSesisonKey.MASKING_PANEL, this);
}
public static void mask(String text) {
if (text != null)
new NTMaskAlert(text);
else
new NTMaskAlert("Processing");
}
public static void unMask() {
NTMaskAlert alert = (NTMaskAlert) WorkFlowSessionFactory
.getValue(WorkFlowSesisonKey.MASKING_PANEL);
if (alert != null) {
alert.hide();
alert = null;
}
}
public void setDisplayText(String displayText) {
this.displayText = displayText;
alert.setText(displayText);
}
public String getDisplayText() {
return displayText;
}
public void setMessage(String message) {
this.message = message;
lable.setText(message);
}
public String getMessage() {
return message;
}
}
Use static mask and unmask method for operations.
This is my solution:
public class CustomPopupPanel extends PopupPanel {
private Label label = new Label();
public CustomPopupPanel() {
super(false, true); // Create a modal dialog box that will not auto-hide
super.setGlassEnabled(true); // Enable the glass panel
super.add(label); // Add the widget label into the panel
}
public CustomPopupPanel(String text) {
this();
this.mask(text);
}
public final void mask(String text) {
label.setText(text);
super.center(); // Center the popup and make it visible
}
public void unmask() {
super.hide(); // Hide the popup
}
}