[flexcoders] Re: Page States
Simon, could you show an example of this, I am unfortunately new to Flex and I am getting used to the nuances of the tool. TIA John --- In flexcoders@yahoogroups.com, simonjpalmer [EMAIL PROTECTED] wrote: there are lots of ways of making sure that the state of your custom controls is managed exactly how you want it. None of them are completely free, you have to put in some effort. Here are a few: 1) create the control every time it gets accessed. This will guarantee that it retains no state 2) write a clear() function on the control which makes sure that state is cleared and the state of all child controls. Call the clear() function either just before the control gets shown or just after you retrieve the data and switch out of it. 3) make sure that data bindings are in place which mean that the control's state is always accurate, including null bindings or bindings to null. These are not either/or, you can do all of them - it depends on exactly how you want your app to behave and how you want to structure your code. Personally I do a lot of 2) and have a clear function called preInitialise() on every custom control and I make sure that it gets called before the control is shown. I do all the set-up/clean-up I need in preInitialise(). I have this standard across all my controls and if in doubt preInitialise on the parent will call preInitialise on the custom controls which are children. All of this is manually written code, nothing is for free. --- In flexcoders@yahoogroups.com, John jpapworth@ wrote: Erm, yes if that is what it is called. Would this do it for every one or just the one you put the code in for? --- In flexcoders@yahoogroups.com, simonjpalmer simonjpalmer@ wrote: Are you asking how you clear data state from a custom component/control? --- In flexcoders@yahoogroups.com, John jpapworth@ wrote: Hi there, I am fairly new to Flex, so I am in need of quite a lot of advice. I am building some pages that I require them to start from the beginning rather than retaining their last state, but equally I would like to be able to have some of my pages to retain their last state. Thanks John
[flexcoders] Re: Page States
there are lots of ways of making sure that the state of your custom controls is managed exactly how you want it. None of them are completely free, you have to put in some effort. Here are a few: 1) create the control every time it gets accessed. This will guarantee that it retains no state 2) write a clear() function on the control which makes sure that state is cleared and the state of all child controls. Call the clear() function either just before the control gets shown or just after you retrieve the data and switch out of it. 3) make sure that data bindings are in place which mean that the control's state is always accurate, including null bindings or bindings to null. These are not either/or, you can do all of them - it depends on exactly how you want your app to behave and how you want to structure your code. Personally I do a lot of 2) and have a clear function called preInitialise() on every custom control and I make sure that it gets called before the control is shown. I do all the set-up/clean-up I need in preInitialise(). I have this standard across all my controls and if in doubt preInitialise on the parent will call preInitialise on the custom controls which are children. All of this is manually written code, nothing is for free. --- In flexcoders@yahoogroups.com, John [EMAIL PROTECTED] wrote: Erm, yes if that is what it is called. Would this do it for every one or just the one you put the code in for? --- In flexcoders@yahoogroups.com, simonjpalmer simonjpalmer@ wrote: Are you asking how you clear data state from a custom component/control? --- In flexcoders@yahoogroups.com, John jpapworth@ wrote: Hi there, I am fairly new to Flex, so I am in need of quite a lot of advice. I am building some pages that I require them to start from the beginning rather than retaining their last state, but equally I would like to be able to have some of my pages to retain their last state. Thanks John
[flexcoders] Re: Page States
Are you asking how you clear data state from a custom component/control? --- In flexcoders@yahoogroups.com, John [EMAIL PROTECTED] wrote: Hi there, I am fairly new to Flex, so I am in need of quite a lot of advice. I am building some pages that I require them to start from the beginning rather than retaining their last state, but equally I would like to be able to have some of my pages to retain their last state. Thanks John
[flexcoders] Re: Page States
Erm, yes if that is what it is called. Would this do it for every one or just the one you put the code in for? --- In flexcoders@yahoogroups.com, simonjpalmer [EMAIL PROTECTED] wrote: Are you asking how you clear data state from a custom component/control? --- In flexcoders@yahoogroups.com, John jpapworth@ wrote: Hi there, I am fairly new to Flex, so I am in need of quite a lot of advice. I am building some pages that I require them to start from the beginning rather than retaining their last state, but equally I would like to be able to have some of my pages to retain their last state. Thanks John
