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Focus lost when IPleaseWaitService is called before a modal dialog using Catel

In summary, I do have a modal dialog in Catel, invoked with:
_uiVisualizerService.ShowDialog(viewModel)
Inside that dialog, I do a long process showing a Wait Service:
_pleasewaitservice.Show();
// HARD WORK here
_pleasewaitservice.Hide();
And Then I invoke another modal dialog.
_uiVisualizerService.ShowDialog(configureViewModel)
However, when I click outside of the application while it is doing the hard work (when the pleasewaitservice is shown), the second modal dialog is displayed behind the main application, so I cannot focus the Window because it is behind and it is modal. I have to close the app from the task killer.
After checking it carefully, I realized that origin is the pleaseWaitService. If I don't show it, the second modal dialog is always displayed correctly.
Does anyone have any hint about how to solve it?
I was googling about how to force to set focus in any Window, but I didn't find anything.
Thanks
Regards
Saul Hidalgo.

You might want to try the BringWindowToTop extension method inside the code-behind of the window:
https://github.com/Catel/Catel/blob/46fcc69575e533eb9e02669ebaa2246894dc98d8/src/Catel.MVVM/Catel.MVVM.Shared/Windows/Extensions/WindowExtensions.cs#L237

Dialog box doing more than just hiding itself on close

According to the MSDN document, the close operation on a form shown with ShowDialog() should only cause the form to be hidden. Subsequent calls to ShowDialog() will unhide the form.
This doesn't seem to be case, exactly. I have a form with a tree view on it. The check states are preserved between calls to ShowDialog() but any node expansion the user has done is reset back to its default state. Also, the Load event is being executed every time as well. So it seems to be doing more than just "hiding" the form. Anyone have any idea what's up?
Thanks

I've experienced this issue myself. For some reason, calling Form.Hide or setting visible = false on a modal form will call Form.Close in at least some cases. To work around it I set the opacity to zero. You can also use Form.Show instead.
It is somewhat intuitive if you imagine the behavior of a modal dialogue. It blocks the parent window. So if you hide it then there would be no active window for the user to interact with. FWIW, I think the behavior should have been that the parent becomes active again. That's just not always the case.

How do I make a custom modal popup window in WPF and have it return a value?

I'm taking a whack at WPF and trying to learn as I go. I'd appreciate any advice offered.
I've got a Window that has a Page attached to it (through a Frame on the Window). When you press a button on the Page, I want a custom window to pop up to present several custom options and be displayed in a manner of my choosing (I'm thinking right now I want it to be a grid but that may change as I go on). When selected, the modal window will disappear and return to the calling method (button press from the Page) the value of the selected choice.
I don't want the standard windows dialog box with the options of yes, no, okay, cancel, or anything like that. This is truly just a custom popup that returns a value to the caller when the user makes their selection on the popup.

Create a new Window subclass, which you can layout however you like. Then in your button click event handler, display it modally using myModalWindow.ShowDialog();. You can then have a property on the window class which you can access after it closes in order to access result data, i.e.:
myModalWindow.ShowDialog();
var data = myModalWindow.SomeResultProperty;
If you really want to have something returned from a method, I suppose you could create your own public method on your window class which internally calls ShowDialog() and then returns a value.

Close Modal Form when mouse click outside form area

I would like to close a modal form when the user clicks outside (anywhere on the computer desktop) the modal form. How can we do this as a modal form is not meant to lose focus.

You need to hook mouse (and keyboard if required) and capture their events. Then check if the click happened outside the form (and area). If yes, flag a sign which can be read by the model form that it can close down.
Algo:
Hook mouse click event.
When callback function is called, check for the click position - if it's inside your form or not (you might need to translate the locations to Desktop locations - I hope you know how to!)
If the point is outside the form, set a flag (boolean or anything that makes you happy). Make sure the form can read the flag somehow.
Trigger an event for form to capture. In it's handler read the flag status. If true, close/unload the form.
This page will tell you technical details and functions.

I don't think you need to make it modal... then you can take siride's option of closing it on the Deactivate event.
The reason you don't need to make it modal: The first time you display it, it will have the focus and be topmost. Modal prevents you from clicking somewhere else, but you want to be able to click somewhere else... and when you do, the form goes away, so there are no modal needs.

csharp winform modal window, able to click on main window

language c#, winform
how do i create a modal window or such a thing that when it still showing
i would still be able to click or interact with the main window..
thanks.
put some code please or links..

Make the dialog non-modal (use Show instead of ShowDialog), and make it top-most (TopMost = true)

Just use the overload of Form.Show() that takes a form as a parameter, like this:
Form f = new Form();
f.Show(this);
This will keep the form always on top of the form that calls it, but still let you click and access the calling form.

Some confusion here I think;
Modal is when the window blocks the underlying window, and must be closed to enable the underlying window to regain control. Form.ShowDialog(owner) is used to accomplish this.
Non-Modal is a window that is opened "in parallell" to the underlying window. Both windows can be accessed and respond to mouse and key events. Form.Show(owner) to accomplish this.

Modality by definition means that you are not able to click anywhere else. You can create another form and show it with Show() method.

Show() Method allows you to click anywhere while ShowDialog() won't