Q: Grouping active objects

[ardo]

Working on my first app here, need some help.

I made a static active object representing a stationary target in a shooting game. The target has 3 zones for scoring. When the right mouse button is clicked, a Hit (bullet hole) object is created. The scoring is dependent on which zone / hit collision is detected. Player gets 5 points for hitting ZoneA, 2 points for ZoneC, and 1 point for ZoneD. Zones are hidden behind the target, and all that player sees is the target itself. Zone position is relative to the target.

I want to give players the ability to reposition the target on screen by dragging. Which means I need all 4 active objects to move as one. I also would like to give player an ability to clone targets (and their hit zones) at runtime, to create multiple targets.

Is there a way to 'group' all 4 objects together so that moving or cloning is done for the whole group? Also, how do I make these respond to a drag event as a group?

TIA.

[LB]

Would it not be simpler to scroll the entire frame instead of moving four objects?

[ardo]

It might. But I also need to move cloned/additional targets relative to each other. And to allow targets to overlap.

I got the move working - sort of. I get mouse coordinate changes while dragging, and update coordinates of all 4 active objects accordingly. They all move together, but the target doesn't just move, it is leaving a trail of targets behind. Mind-boggling...

P.S. I decided to simplify the scenario to understand what's going on. Now, all 4 objects are moved by 10pix when the Left Arrow key is pressed. The trail is still left behind. Is there a way to 'redraw' the frame to lose those artifacts?
Moving_Trail.jpg

[LB]

EDIT: That redraw thing looks like you're doing something wrong, as that should not happen...

You can achieve a group movement effect like this:

[ardo]

Indeed! I'm still struggling with the events editor.

Thanks for sharing your app, it is clean and elegant.

Happy New Year!

[ardo]

Turns out,my Target's "Save backgound" was off, hence the trail...