cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   eshirt
   Member

   I can't seem to find a way to implement something I've been working on... Is there a way to tell if a Menu already contains a MenuItem that is set to selected? For example, I've got a Menu with 12 MenuItemImages. I want to be able to click on one image, and it will be selected (switching to the "selected" image appropriately).

   I've got that working fine, but now every button I tap gets selected and remains selected. I'd like to be able to check to see if another item is selected, if so, deselect that one and select the most recent tap. Here's an example of my code:

   - (void) init {
   
   // normal layer setup stuff
   MenuItemImage *image1 = [MenuItemImage itemFromNormalImage:@"image1.png"
   													selectedImage:@"image1_sel.png"
   														   target:self
   														 selector:@selector(setSelectedImage:)];
   MenuItemImage *image2 = [MenuItemImage itemFromNormalImage:@"image2.png"
   													selectedImage:@"image1_sel.png"
   														   target:self
   														 selector:@selector(setSelectedImage:)];
   // and so on, for a few more items
   Menu *menu = [Menu menuWithItems: image1, image2, [and on and on], nil];
   
   // menu position and alignment, then add child on top of all other layers
   }
   
   - (void) setSelectedImage: (id)sender {
   [sender selected];
   }

   Thanks in advance for any help you can offer!

   Posted 2 years ago #
2. 

   jd
   Member

   NSArray *kids = [menu children]; // Menu has children
   MenuItem *m = [kids objectAtIndex: 0]; // first child. you can check them all in a loop if you want
   m.isEnabled = NO; // do stuff like disable

   After you mess with it, you may need to redraw:
   [menu draw];

   Posted 2 years ago #
3. 

   eshirt
   Member

   @jd - thanks for the quick reply.

   I think I understand about half of your suggestion. :) I'm getting there now that I know that I can create an array from the Menu's children, but I'm not sure I'm understanding how to implement the rest of it.

   Sorry if this seems a bit basic, but if I could restate the desired action, could someone let me know if I'm approaching this correctly?

   I've got a set number of items in a menu (12) and only one can be selected at a time. When a user taps a menu item, I want to show it as selected. If another item is already selected, that one will be deselected. Then a user is going to tap a "next" button on the same screen that will record the selection to the game's user data.

   My best understanding of this is that I'm going to need to capture the Menu's children in an array, loop through each object to check for the isEnabled property, compare it to the sender, and enable/disable each item appropriately.

   Is there anything I'm missing? Any hints on how I'd be able to capture the selected object's index and relate that to user data? Could I just loop through the array again, assigning user data using else/if statements? Sorry for the long-winded n00b question, but I'm still fairly new to all this.

   Posted 2 years ago #
4. 

   eshirt
   Member

   Here's what I came up with. Seems to work, but any suggestions for improving it would be greatly appreciated!

   NSArray *menuItems = [myMenu children];
   
   	for (MenuItem *m in menuItems) {
   		if (m.isEnabled == YES && m != sender) {
   			[m unselected];
   		} else {
   			[m selected];
   		}

   Posted 2 years ago #

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