I have implemented two custom IWorkbenchPreferencePage's and they are working as expected. Basically Page1 shows different information based on the selections made in Page2. The problem is that I have to close (explicitly save) the preference dialog to see the changes of Page2 reflect in Page1.
Now I was wondering if there is some kind of mechanism that would allow me to do something (In my case save information on the open preference page) once a IWorkbenchPreferencePage gets left.
You can override the okToLeave method which is called when a different page is selected.
The default implementation of this in PreferencePage is:
#Override
public boolean okToLeave() {
return isValid();
}
You can also use the
public void setVisible(boolean visible)
method which is called when the page is made visible and when it is hidden (be sure to call super.setVisible in your override).
Related
I want to set the focus to a certain field (org.gwtbootstrap3.client.ui.Input) in a dialog (org.gwtbootstrap3.client.ui.Modal) before the dialog shows up. The use case seem quite common, if you have a dialog with a single field like the Upload text or Add feed dialogs right here. However I could not figure out how to set the focus to this particular gwtbootstrap3 component.
The Input component does have a setFocus(true) method. I assumed that setting the focus before showing the dialog would not work, which it doesn't. So the logical solution is to put the method call inside a ScheduledCommand. Like this:
Scheduler.get().scheduleDeferred(new ScheduledCommand() {
#Override
public void execute() {
textField.setFocus(true);
}
});
That usually works with GWT standard components, but does not seem to help in this case. I found a way to get notified once the dialog is shown through a ModalShowHandler. Like this:
modal.addShowHandler(new ModalShowHandler() {
#Override
public void onShow(ModalShowEvent evt) {
textField.setFocus(true);
}
});
I even tried to combine both, adding a deferred call to the handle. No luck. Any ideas?
You should be listening on the ModalShownEvent (note: Shown, not Show).
ModalShowEvent is fired when the modal is requested (for example, programmatically) to be shown.
ModalShownEvent is fired when the modal is actually shown.
This somewhat confusing naming is based on the events of the native Bootstrap Modal's events: show.bs.modal and shown.bs.modal.
ModalShownEvent combined with the usual Scheduler#scheduleDeferred should do the trick.
I am trying to open an email client just like using mail me tag.
But I want to use my custom widget, which is not hyperlink, anchor or so. I added a DOM handler to my widget to listen to clicks:
public class VContactWidget extends VHorizontalLayout implements ClickHandler {
private HandlerRegistration clickHandler;
public VContactWidget() {
// added some content here
clickHandler = addDomHandler(this, ClickEvent.getType());
}
#Override
public void onClick(ClickEvent event) {
Window.open("mailto:john.doe#mail.com", "_blank", "");
}
}
Everything is working fine except one detail: When the widget is clicked, new empty browser tab will open with url set to mailto:john.doe#mail.com. I don't want the new tab opened. Can I avoid it somehow?
Note I set _blank parameter, as used in many examples. I also tried to use empty string or some other values as well. I looked into documentation, but didn't find anything useful.
https://developer.mozilla.org/en-US/docs/Web/API/window.open
One solution may be to use Anchor, but my component is more complex, not just single <a> link.
Another detail to note may be application server - I am using Tomcat 7 now.
Trying to fire native event on hidden Anchor programatically did not work for me. (Which does not mean it cannot be done.)
This is, how I actually solved my problem: Instead of Window.open(), I used following call:
public void onClick(ClickEvent event) {
Window.Location.assign("mailto:john.doe#mail.com");
}
This is not something that you can control. Whether this link opens in a new tab or a new window depends on the browser settings and user preferences.
I don't think it will make a difference if you use an Anchor or Window.open. In either case, the behavior may be different in different browsers. Also remember that for some users a click on this link will open Outlook or Mail, while for other users it will open Gmail in a browser window.
UPDATE:
If you want an exact behavior of an <a> element, create a hidden anchor element and fire a click on it when a user clicks on your composite widget.
Firing click event from code in gwt
I have this situation, where I display a success/error message on a page and then I want it to disappear when the user does anything on the page (I assume that that triggers a click event, I can ignore events like going to new tab/windows etc.).
I have other "uihandlers" and "clickhandlers" on the page. So if I click empty regions on the page only the hidemessage call fires, else if I click valid 'clickable' elements my hidemessage fires first followed by the relevant handler.
Is there a way I can achieve this without adding hidemessage to all my clickhandlers on the page?
Edit: The message widget is not a PopupPanel, so setAutohide(true) won't work. But it is exactly the behavior I'm looking for. The widget is a custom widget which extends Composite implements HasWidget, HasClickHandlers
You can do this on your error message:
myPopupPanel.setAutoHideEnabled(true);
It does exactly whet you need. You may also consider setting auto-hide on history events (mostly back button):
myPopupPanel.setAutoHideOnHistoryEventsEnabled(true);
EDIT:
If you are not using a PopupPanel, you can make your Widget implement EventPreview, and then:
public boolean onEventPreview(Event event) {
Element target = DOM.eventGetTarget(event);
boolean widgetIsTarget = (target != null) && DOM.isOrHasChild(getElement(), target);
setVisible(widgetIsTarget):
Thats a general question about: How to structure my website with all its pages and components (here panels) in wicket. I would like to show my attempt and hope someone can give me advice, wheather its a good way or if there is a better one.
My Structure is like:
Root: HomePage
Page1 extends HomePage
Page2 extends HomePage
Page3 extends HomePage
The pages wrap the content and its own navigation. They get init in HomePage.html with wicket child.
Now, when I define a new Panel for Page1, I have to define a link for it as well. For the link onClick() I set the panel to which it refers to visible and all other panels to invisible. Also I have to define on the Page1 the panel, which gets shown when I navigate to Page1. All other panels are invisible.
Is this a good attempt or is there a better way? Now I initialize ever panel and just hold them invisible.
A shot at answering your questions... This assumes you're using Wicket 1.4.x.
First, you can have many levels of Page classes, often mimicking the overlap of the design and function. For example, say you have an application where people "Write", "Browse" and "Read" user-created books.
RootPage - common headers/footers, javascript imports
AbstractWritePage extends RootPage - for anything regarding authoring
AbstractBrowsePage extends RootPage - browsing
AbstractReadPage extends ReadPage - reading
Then, I implement something like:
FullLibraryPage extends AbstractBrowsePage
FilterSearchPage extends AbstractBrowsePage
In the long run, it gets complicated, but very powerful.
Secondly, your Panel components that go visible/invisible. If you're using Wicket 1.4.x, you should look at the overrideable method onConfigure() for each Panel. In this panel, you can set the visibility like:
#Override
protected void onConfigure() {
super.onConfigure();
setVisible(!navTriggered);
}
where navTriggered is a boolean value residing in the containing page. Then, your link could do a simple:
#Override
protected void onClick(AjaxRequestTarget target) {
navTriggered = false;
target.addComponent(/* Appropriate panels; see below for multiples */);
}
The advantage to this is that you can have multiple panels triggered by the same boolean variable. There is nothing wrong with creating all of your panels at page creation time, even if they start out invisible.
Finally, if you have a lot of panels that need to be changed/triggered/etc, consider pairing an IVisitor with a marking interface. Something like...
public class Panel1 implements MyPanelGroup { ... }
public class Panel2 implements MyPanelGroup { ... }
Then, you can use an IVisitor to visit every instance of MyPanelGroup in a page and do something with visibility (either set visibility, add it to the AjaxRequestTarget, etc).
Hope that answers something :)
I am adding 3 pages inside an editor through Eclipse's FormPage. Now on selecting each page I want a listener to get fired. I tried to implement IPageListener in each page class, but none of them responded me. How to get the listener while selecting any page in eclipse FormPage?
I have made a FormEditor class,
public class SimpleFormEditor extends FormEditor
Then I added addPage inside it,
addPage(new ApplicationFormPage(this));
Now in this ApplicationFormPage, I implemented IPageListener,
public class ApplicationFormPage extends FormPage implements IPageListener{
Actually my plan is to get the listener as soon as we click on this page tab.
When your form page is instantiated, you need to add it to something in order to get notified of page changes. In MultiPageEditorPart they use org.eclipse.jface.dialogs.IPageChangedListener.
formEditor.addPageChangedListener(page);