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Mac Forum / Programming / Mac Programming / October 2004Multiple modal dialog sessions
Hi, in my application I start running a modal session for a dialog using [NSApplication runModalForWindow]. This works fine, but when I click on a button in this dialog, another modal dialog comes up and here is my problem. The second modal dialog is the only dialog the accepts user input, such as clicking lists or entering text. However, if I click on the first modal dialog (which is in background now) the dialog comes to front and covers the second dialog which runs the current modal session. Did I forget to set any flags for the windows to prevent this from happening? Thanks in advance. - Jörn > Hi, > [quoted text clipped - 8 lines] > Did I forget to set any flags for the windows to prevent this from > happening? First, let me address the user-interface issues with this approach. It's generally a bad idea to start a modal dialog from another modal dialog. Try to avoid it if at all possible. You could, for example, use a sheet together your input, or something else like that. Even better would be some kind of modeless input mechanism. Forcing the user to provide input before he can do anything else with your program is to be avoided if at all possible. On to the technical aspect, if you decide you want to keep this interface anyway. I'm guessing there's some problem having two modal sessions going at the same time. You should probably stop your "outer" one before starting the "inner" one, and then restart it once you're done. > > Hi, > > [quoted text clipped - 21 lines] > at the same time. You should probably stop your "outer" one before > starting the "inner" one, and then restart it once you're done. Try hiding the first dialog for as long as the second one is active. Alternatively, just make them both exactly the same size and appear at exactly the same screen coordinates! A long, long time ago I actually did something similar with modal dialogs, but that was for OS 7. That avoided the "click in the other modal" problem by intercepting all mouse clicks in the modal dialog event proc. I have no idea if that's at all relevant to your situation, but strongly suspect it isn't given the substantial differences between then and now... > Try hiding the first dialog for as long as the second one is active. > > Alternatively, just make them both exactly the same size and appear > at exactly the same screen coordinates! I am having trouble deciding which of these two "solutions" would make me gag first. They are both terrible UI. meeroh  SignatureIf this message helped you, consider buying an item from my wish list: <http://web.meeroh.org/wishlist> |
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