How can I get notified when one of the tabs is clicked in the multi page editor? IPartListener/IPartListener2 seems to react when the whole editor changes state.
The tabs on the multi-page editor are not Parts so they are not reported by IPartListener/IPartListener2.
MultiPageEditorPart does not provide an API that other parts can use to detect the tab selection. The actual editor using MultiPageEditorPart can override the pageChange method to be told about the tab selection.
Related
I am working on xamarin.forms. I am using Master detail page. In menupage of MasterDetailPage I have some menu items that are listed. At the bottom of the Menu list I placed a button on menu page. Now I need to open a popup on click of that button. I am trying with PopupLayout but not able to get any success.
Please tell me how I can open a custom popup box at the click of the button that is placed in menu page?
Regards,
Anand Dubey
Without going into separate, native projects for all platforms you are targeting (such as Android, iOS, UWP...), you cannot pop out custom UI content over existing pages in Xamarin.Forms out of the box. You would need to bring in additional references or get creative with the AbsoluteLayout control.
Here are a few options you have:
Simple popup with message and or option selection
If all you need is a simple popup message or a list of buttons, you should look into the native DisplayAlert and DisplayActionSheet methods. They are built into Xamarin.Forms and work really well for these simple cases.
More complex popup dialogs
For anything more complex than that, there is the excellent UserDialogs project: ACR UserDialogs github page
It will give you support for various loading dialogs, date, time pickers, action sheet, success/info/error toasts and more.
Fully custom UI markup with AbsoluteLayout
There is a technique where by you prepare the underlying page with a root absoltue layout, which enables you to dynamically add new UI on top of all other controls on your page. This is fiddly and can ruin your performance if you are not careful. This is also the approach that the PopupLayout control that you mentioned uses. If done properly, this can be a good solution, but I don't recommend it as it involves additional complexity on each page that hosts the popup content.
Fully custom UI popup on native projects
Your most flexible option, as always, is to fall back to the native projects. This would involve coding up the popup logic on each separate platform that you are targeting, then using DependencyService (or one of the other techniques) to call into it from the shared project. For this you should look at samples and tutorials for popups on separate native platforms as it gets pretty broad and goes way outside the topic of this question.
I'm trying to build a Wizard framework in Windows Forms. I've managed to glean a lot of useful tips from this and other sites which have gotten me very close to success. However, I'm having a problem with displaying an ErrorProvider on any tab page other than the first page of the wizard.
My Wizard control is a UserControl. It contains a custom tab control that I've derived from TabControl so that I can hide tabs and ignore attempts to navigate between tabs using keypresses, along with the usual collection of Back/Next/Finish/Cancel buttons at the bottom of the control.
I've used reflection to allow me to raise the validation events on a particular TabPage that belongs to the Wizard Control when I hit the Next button. (I don't want to validate the whole TabControl, only the currently active page.) When I do this, I see in the debugger that my Validating routine for the controls on the current tab page is correctly called and I see that I've called the ErrorProvider that I've attached to the particular control (a TextBox in this case) with a valid error message. I set Cancel to true for the CancelEventArgs in the validating routine and that's picked up by the code that uses the reflection mechanism so that I see that I've failed and don't change tabs. And I set the focus successfully to the control that failed validation.
So all that appears to be working just fine.
Unfortunately, I don't see the ErrorProvider's cheery blinking icon unless I'm on the first tab page. For all of the other tab pages, there's no message visible at all.
I'm baffled. Any thoughts? I can provide code snippets, if helpful.
Thanks!
I assume that in your case the button that moves to the next step of the wizard is placed outside (below) the TabControl
I noticed that the icon is displayed correctly if I pressed the button without releasing the mouse button. It seems that the button outside the container gets focused event though a validation error has occurred (normally you would not be able to leave the active control).
I worked around this issue by registering an event handler for the buttons MouseUp event to "refocus" the TabControl:
private void cmdOK_MouseUp(object sender, MouseEventArgs e)
{
tabControl1.Focus();
}
Note: you also need to set your forms ActiveControl property the one of the controls that failed validation.
Is it possible to show a popup only in a certain gwt tab or a panel in that tab?
I've found methods to show a popups over the whole page, but not only in specific tabs.
When you switch the gwt tab, the popup should not be visible anymore and new popups should be able to be created, which again are only visible in the switched to gwt tab. Switching back to the other tab should then show the first popup again.
Optionally the rest of the tab, which is not covered by the popup, should not be clickable.
Are there any native methods for this? The gwt Popup Panel only seems to create popups for the whole page.
Edit: I've tried using smartgwts Window which seems to work just the way I want it to. When I switch the gwt-tab, the popup is no longer visible and returns when I switch back. The only problem is, that it isn't displayed right. The frame is placed on the far left side of the browser tab, while the content is displayed on the far left of the gwt-tab. If I move the content, the frame moves too. The frame is visible over the whole browser tab, while the content disappears if I drag it over the gwt-tab edge.
I guess it's because I'm adding a Window to a gwt-Panel. Is there any way to fix this without changing everything to smartgwt?
Not exactly, I think.
But, you can do something in the tab events, like hide the popup in tabs that it doesnt belongs. To avoid the lag of show/hide the popup, you can do this in the BeforeSelectionHandler, like this:
getView().getTabPanel().addBeforeSelectionHandler(new BeforeSelectionHandler<Integer>()
{
#Override
public void onBeforeSelection(BeforeSelectionEvent<Integer> event)
{
showPopupupsForTab(event.getItem());
}
});
In showPopupupsForTab you can show the popups for this tab (you can handle this with a map or something) and hide the others...
Something like this.
Hope it helps.
I'm using the TabContainer/TabPanel components of the Ajax Control Toolkit.
I'd like to hide the tabs themselves and use a button elsewhere on the page to activate (bring to the front) one of the tabs without posting back to the server.
I can show and hide the tabs by grabbing their clientIDs and manually setting the visibility and display styles.
But is there a javascript function I can call to do this and perform whatever magic happens behind the scenes when I click an actual tab?
Example:
var tab = $find(“tabContainer’s ClientID”);
tab.set_activeTabIndex(1); // active the second tab panel
tab.getFirstTab().set_enabled(false); // disable the first panel
I would like to allow re-ordering of tabs in a tabview, preferrably using drag and drop of the tab buttons. The example drag/drop code for lists, modified for tabs simply doesn't work (the dragstart event is never fired).
Is this even possible?
At the moment we do not have this functionality out-of-the-box available. However, you can create a bug report at your bugzilla to get this feature in a future release.