How do I make my frames perform certain tricks?

[Bildermensch]

Hi there,
after basic decisions have been made, I now have to do a more in depth prototype
of our planned multi media catalog application. Working on that some questions
popped up, for which I like to ask for some help:

My frames are going to be taller than the actual screen height. When I now
start a frame, it starts in the vertical middle. How do i make it start on the
upper end and how can I add a scrollbar to move it freely up and down?

Then I want to play some videos, which works nice so far. Can I have them play
in a scalable pop up window as well? Can I add player controls?

I am sure other questions will pop up as well, but thats it for now.
Thanks and
best Regards
Heiner

[jn2002dk]

You could make an active object that is the scroll bar knob (no idea what they're actually called), place it in the top of the frame in a layer above the content you want to scroll and then make an Always event where you set the vertical position of the frame to y of the active object

Then you'll need to add a drag and drop movement to the knob

Quick example here

Scrollbar.mfa

I have no experience with videos so hopefully someone else can help with that

[Bildermensch]

Hi there,
@ Pixel Pirate: Your solution seems to give me the functionality I need.
Unfortunateley as a super noob i fail to reproduce the trick: I am able to
set up a Always condition but then fail to set up the expression. Where
and how do I do that?
Thanks for helping me out!
Regards,
Heiner

[jn2002dk]

Check out the screenshot below

Screen Shot 2015-11-23 at 12.44.25.jpg

[Bildermensch]

Hi Pirate,
yeah, I get so far, but then I am lost and do not know where I get the expression 'center display at Y=Y("Symbol")' from ...
Regards
Heiner

[jn2002dk]

Right click the square that's highlighted in the screenshot, the one in the column with the chessboard and chess piece on top

A menu will pop up, move the mouse pointer to the item named Scrollings and then click on center vertical position of frame

That will open the expression editor where you can right click on the active object that acts as the scroll button, then select Position in the pop up menu then click on Y coordinate

[Bildermensch]

Thank you,
I was able to make this, but my frame is starting centered. So the scroll object is outside the screen, and the screen is not centering on it :-(

Regards
Heiner

[jn2002dk]

Any chance you could post the file?

[mobichan]

Here is a simple example of how to make a scrollbar. I commented each line so you can follow what I did. You can basically make the frame any height you want. Just make sure any objects you want to move with the scrolling are on the "bg" layer and they have "follow the frame" checked in the object properties.

scrollbar.mfa