Inquiry about Building Apps with Many (Actual Real) Screens

[Trch_Vv]

• I want Set the BackPressed event to close the layout displaying the pdf, and reset the visibility of your buttons so that you are back on the initial page view.

• But what happens to me, for example, is when I view a PDF file on Screen2 and clicking on BackPressed goes to screen1, while I want to back into the initial page view (Screen2) and not to screen1.

[ChrisWard]

Quick question Trch -what are all those screens for?

I wouldn't just close the App on Screen1 back pressed, the User could easily do that accidentally. It's better to pop-up a Notifier so that the User can confirm they want to close it.

[TIMAI2]

Still cannot see the need for all those screens. If these are the blocks for Screen1:

then there is no need to go to any other screen, and where is the logic to open another screen ?

For your second set of blocks Button 1 doesn't make any sense, if you are in Screen2, why are you trying to open Screen2?

Which pdf extension are you using ?

[Trch_Vv]

[Trch_Vv]

I'm sorry I sent the wrong file. These are the Blocks for the application I'm asking about

[TIMAI2]

What screen are "all" those blocks for, Screen2 ? Please help us to help you...

Looking at the extension (PrimePDFViewer) you have a method called Recycle, which resets the pdf viewer. This might be what you are after?

You should still be able to use just one screen to view your pdfs...

Here is an example app using my viewpdf extension and Ulli's Popup extension

ExampleViewMultiplePDFs.aia (53.8 KB)

[Trch_Vv]

I will try to explain it to you in another way, maybe you will understand me

[Trch_Vv]

Screen1:

This screen features 5 sections (5 buttons). Clicking button 1 will transition to Screen2, clicking button 2 will transition to Screen3, button 3 to Screen4, and so on.

[Trch_Vv]

Screen2:

This screen has 7 buttons. Clicking button 1 will open a PDF file and display it via the extension. Clicking button 2 will open another PDF file and display it via the extension, and so on for the remaining buttons.

Desired Functionality:

For example in screen2, when a PDF is displayed and the "BackPressed" button is clicked, the layout displaying the PDF should close, and the visibility of the Screen2 buttons should be reset to the initial view.

If "BackPressed" is clicked again, should be returned to Screen1.

Finally, if "BackPressed" is clicked in Screen1 → the application must be closed.

And so on for the rest of the Screens 3,4,5,6.

[TIMAI2]

If you insist, you will need to understand switching screens.Here is one example:

Any good reason because my aia does not open an existing screen?

Try this: TestNestingScreens_revised.aia (15.5 KB) Screen1 remains open to stop it be re-initialised when returning from Main. (Hence the use of tinydb on Screen1 and Main) All other screens are closed when another screen is opened. To test, you will need to compile to an apk for this to work properly.

[TIMAI2]

This might be more inline with what you want (but still only using one screen) ?

ExampleViewMultiplePDFsV2.aia (32.7 KB)

[Trch_Vv]

Regarding this, for example when I'm on this page and I click on BackPressed

[Trch_Vv]

Can you make it go to here instead of exiting the app?

[TIMAI2]

When you back press, you should be offered a choice ?

Selecting Return, does what it says, returns you to the start view.

[Trch_Vv]

What I mean,
when I am here and I click the BackPressed

[Trch_Vv]

Is it possible to make it automatically navigate to here without the Notifier and options appearing?

[Trch_Vv]

Then, after that, when I am here and I click the BackPressed, the Notifier with the options appearing

[TIMAI2]

Yes

Rearrange your backpress and notifier blocks like this:

Alternatively you could:

[Trch_Vv]

Thank you very much, the problem has been solved thanks to you.