[dabo-users] cascading dropdown controls selections
Hi, I have always had issues with dropdowns selection determining the a second control. Now I have need to have fours dropdowns and each of the dropdowns data (or Choices) will depend on the preceding dropdown selection. Does anyone have a suggestion on how best to deal with my requirement? Thanks in advance, Johnf ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/201104070722.51749.jo...@jfcomputer.com
Re: [dabo-users] cascading dropdown controls selections
On Thu, Apr 7, 2011 at 10:22, John Fabiani jo...@jfcomputer.com wrote: Hi, I have always had issues with dropdowns selection determining the a second control. Now I have need to have fours dropdowns and each of the dropdowns data (or Choices) will depend on the preceding dropdown selection. Does anyone have a suggestion on how best to deal with my requirement? John, I would disable the controls that aren't populated yet. Populate the first control. Then, have event handlers for each dropdown to populate the next one and enable it. If the user changes the first dropdown, the event handler should repopulate the second dropdown and disable the rest, essentially forcing the process to start over. Regards, Nate ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/banlktikmuqetejdpwz9wg4340nmazo0...@mail.gmail.com
Re: [dabo-users] cascading dropdown controls selections
Am 2011-04-07 um 16:22 schrieb John Fabiani: Hi, I have always had issues with dropdowns selection determining the a second control. Now I have need to have fours dropdowns and each of the dropdowns data (or Choices) will depend on the preceding dropdown selection. Does anyone have a suggestion on how best to deal with my requirement? I reload the other dropdowns’ choices after a Hit on one, it all happens in the onHit handler. Perhaps I don’t undersa´tand your question? Greetlings from Lake Constance! Hraban --- http://www.fiee.net https://www.cacert.org (I'm an assurer) ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/21ea9dc7-07c6-4c4e-b1eb-63b7a34cf...@fiee.net
Re: [dabo-users] cascading dropdown controls selections
On Thursday, April 07, 2011 07:44:56 am Henning Hraban Ramm wrote: Am 2011-04-07 um 16:22 schrieb John Fabiani: Hi, I have always had issues with dropdowns selection determining the a second control. Now I have need to have fours dropdowns and each of the dropdowns data (or Choices) will depend on the preceding dropdown selection. Does anyone have a suggestion on how best to deal with my requirement? I reload the other dropdowns’ choices after a Hit on one, it all happens in the onHit handler. Perhaps I don’t undersa´tand your question? Greetlings from Lake Constance! Hraban --- http://www.fiee.net https://www.cacert.org (I'm an assurer) No that's right - I will be using OnHit. But the problem is not as straight forward as you suggest. If I set the first dropdown the second, third, and forth must match. If I set the second the third and forth data choices must match what is in 1 and 2 - and so on. If I set all of them and then change the first then all the rest must change. To make matters worse none of the data items come from the same tables. Each dropdown filters the data available for the next. And remember I want this to work with Dabo's DataSource and DataFields when not entering data into a new record. I have considered creating a view and then actually filter the data as required since the records are related but then I could have several thousands of records in memory. So I have discounted that solution. I have considered creating a class that would provide a dynamic property that could be set to retrieve the data (choices and keys). Similar to the ones Ed and Paul have created for other controls. Not sure how much work this would be? I have considered creating a single method that all dropdowns call and control the data in the method. I would be able to read the values (keys) from each of the controls and do what is required to reset the choices for each of the controls. This might be the way to go. But I looking for suggestions - from the list. I don't want to start a lot coding only to later discover I'm traveling along the wrong path. Johnf ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/201104070806.45733.jo...@jfcomputer.com
Re: [dabo-users] cascading dropdown controls selections
On Thursday, April 07, 2011 07:44:49 am Nate Lowrie wrote: On Thu, Apr 7, 2011 at 10:22, John Fabiani jo...@jfcomputer.com wrote: Hi, I have always had issues with dropdowns selection determining the a second control. Now I have need to have fours dropdowns and each of the dropdowns data (or Choices) will depend on the preceding dropdown selection. Does anyone have a suggestion on how best to deal with my requirement? John, I would disable the controls that aren't populated yet. Populate the first control. Then, have event handlers for each dropdown to populate the next one and enable it. If the user changes the first dropdown, the event handler should repopulate the second dropdown and disable the rest, essentially forcing the process to start over. Regards, Nate I had not considered disabling and then enabling the controls. I like it. No matter how this gets written I bet that suggestion will be used. Thanks Nate! Johnf ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/201104070809.45233.jo...@jfcomputer.com
Re: [dabo-users] cascading dropdown controls selections
Am 2011-04-07 um 17:06 schrieb John Fabiani: No that's right - I will be using OnHit. But the problem is not as straight forward as you suggest. If I set the first dropdown the second, third, and forth must match. If I set the second the third and forth data choices must match what is in 1 and 2 - and so on. If I set all of them and then change the first then all the rest must change. To make matters worse none of the data items come from the same tables. Each dropdown filters the data available for the next. And remember I want this to work with Dabo's DataSource and DataFields when not entering data into a new record. I have considered creating a view and then actually filter the data as required since the records are related but then I could have several thousands of records in memory. So I have discounted that solution. I have considered creating a class that would provide a dynamic property that could be set to retrieve the data (choices and keys). Similar to the ones Ed and Paul have created for other controls. Not sure how much work this would be? I have considered creating a single method that all dropdowns call and control the data in the method. I would be able to read the values (keys) from each of the controls and do what is required to reset the choices for each of the controls. This might be the way to go. But I looking for suggestions - from the list. I don't want to start a lot coding only to later discover I'm traveling along the wrong path. The other suggestion of disabling not-yet-set dropdowns is probably good. You could use events/signals to update all DDs in need. Most easy is probably to update DD2 from DD1.onHit, update DD3 from DD2.onHit etc. (only the next one, not more, except if there’s a high probability that the user wants a default value) and perhaps reset all following DDs (in case someone changes the selection of DD1 after setting DD3). In my similar case, I try to keep the selection of following DDs, since some selection-cascades are very similar, and it’s annoying to choose the same over and over if you’re exploring possibilities. But in my case I don’t use Dabo’s bizobjs, but have read all the data from an http/JSON call and keep it in memory for the runtime (it’s not so much, only lists of sections and subsections for several magazines). Sorry for being of no big help. Greetlings from Lake Constance! Hraban --- http://www.fiee.net https://www.cacert.org (I'm an assurer) ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/ba53ae8c-5d6f-4044-a98f-28d0c8d3a...@fiee.net
Re: [dabo-users] cascading dropdown controls selections
On Thursday, April 07, 2011 08:20:37 am Henning Hraban Ramm wrote: Am 2011-04-07 um 17:06 schrieb John Fabiani: No that's right - I will be using OnHit. But the problem is not as straight forward as you suggest. If I set the first dropdown the second, third, and forth must match. If I set the second the third and forth data choices must match what is in 1 and 2 - and so on. If I set all of them and then change the first then all the rest must change. To make matters worse none of the data items come from the same tables. Each dropdown filters the data available for the next. And remember I want this to work with Dabo's DataSource and DataFields when not entering data into a new record. I have considered creating a view and then actually filter the data as required since the records are related but then I could have several thousands of records in memory. So I have discounted that solution. I have considered creating a class that would provide a dynamic property that could be set to retrieve the data (choices and keys). Similar to the ones Ed and Paul have created for other controls. Not sure how much work this would be? I have considered creating a single method that all dropdowns call and control the data in the method. I would be able to read the values (keys) from each of the controls and do what is required to reset the choices for each of the controls. This might be the way to go. But I looking for suggestions - from the list. I don't want to start a lot coding only to later discover I'm traveling along the wrong path. The other suggestion of disabling not-yet-set dropdowns is probably good. You could use events/signals to update all DDs in need. Most easy is probably to update DD2 from DD1.onHit, update DD3 from DD2.onHit etc. (only the next one, not more, except if there’s a high probability that the user wants a default value) and perhaps reset all following DDs (in case someone changes the selection of DD1 after setting DD3). In my similar case, I try to keep the selection of following DDs, since some selection-cascades are very similar, and it’s annoying to choose the same over and over if you’re exploring possibilities. But in my case I don’t use Dabo’s bizobjs, but have read all the data from an http/JSON call and keep it in memory for the runtime (it’s not so much, only lists of sections and subsections for several magazines). Sorry for being of no big help. Greetlings from Lake Constance! Hraban --- http://www.fiee.net https://www.cacert.org (I'm an assurer) Actually anything someone says is helpful even if it's wrong (not that you are wrong) as long as others correct it. Ask Ed how many times he's corrected me on this list. Of course maybe Ed doesn't agree with my statement. I doubt this problem is very unique (did it all the time for VFP) but it is different for wxPython (therefore Dabo) IMO. With VFP the dropdown (comboBox) was more dynamic. Anyway, I'm playing as I type with a solution of course it's not working. Johnf ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/201104070838.56657.jo...@jfcomputer.com
Re: [dabo-users] cascading dropdown controls selections
On 4/7/11 7:22 AM, John Fabiani wrote: I have always had issues with dropdowns selection determining the a second control. Now I have need to have fours dropdowns and each of the dropdowns data (or Choices) will depend on the preceding dropdown selection. Does anyone have a suggestion on how best to deal with my requirement? I suggest that 90% of the code you write belongs in the bizobj. Provide a method or methods in the bizobj to determine the choices for the 4 dropdowns based on the values of other fields. Provide a method or methods to return True or False whether or not the user is allowed to modify that field currently. Hook into biz.afterSetFieldVal() to catch when the user picks a different row in the listbox. The easiest way to let the UI know that it needs to update the display from the bizobj that I know of would be: self.Application.ActiveForm.update() Paul ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/4d9de01b.5000...@ulmcnett.com
Re: [dabo-users] cascading dropdown controls selections
On Thursday, April 07, 2011 09:02:35 am Paul McNett wrote: On 4/7/11 7:22 AM, John Fabiani wrote: I have always had issues with dropdowns selection determining the a second control. Now I have need to have fours dropdowns and each of the dropdowns data (or Choices) will depend on the preceding dropdown selection. Does anyone have a suggestion on how best to deal with my requirement? I suggest that 90% of the code you write belongs in the bizobj. Provide a method or methods in the bizobj to determine the choices for the 4 dropdowns based on the values of other fields. Provide a method or methods to return True or False whether or not the user is allowed to modify that field currently. Hook into biz.afterSetFieldVal() to catch when the user picks a different row in the listbox. The easiest way to let the UI know that it needs to update the display from the bizobj that I know of would be: self.Application.ActiveForm.update() Paul I had not considered using the bizobj to control the choices. Mostly because I keep ui stuff out (I have exceptions) of the bizobj code. I also haven't used the afterSetFieldVal() in the past - I'll look into it. Thanks for the suggestions, Johnf ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/201104070919.28710.jo...@jfcomputer.com
Re: [dabo-users] cascading dropdown controls selections
On Thursday, April 07, 2011 09:02:35 am Paul McNett wrote: On 4/7/11 7:22 AM, John Fabiani wrote: I have always had issues with dropdowns selection determining the a second control. Now I have need to have fours dropdowns and each of the dropdowns data (or Choices) will depend on the preceding dropdown selection. Does anyone have a suggestion on how best to deal with my requirement? I suggest that 90% of the code you write belongs in the bizobj. Provide a method or methods in the bizobj to determine the choices for the 4 dropdowns based on the values of other fields. Provide a method or methods to return True or False whether or not the user is allowed to modify that field currently. Hook into biz.afterSetFieldVal() to catch when the user picks a different row in the listbox. The easiest way to let the UI know that it needs to update the display from the bizobj that I know of would be: self.Application.ActiveForm.update() Paul Oops? I don't see an afterSetFieldVal Johnf ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/201104070924.16194.jo...@jfcomputer.com
Re: [dabo-users] cascading dropdown controls selections
On Thursday, April 07, 2011 09:24:16 am John Fabiani wrote: On Thursday, April 07, 2011 09:02:35 am Paul McNett wrote: On 4/7/11 7:22 AM, John Fabiani wrote: I have always had issues with dropdowns selection determining the a second control. Now I have need to have fours dropdowns and each of the dropdowns data (or Choices) will depend on the preceding dropdown selection. Does anyone have a suggestion on how best to deal with my requirement? I suggest that 90% of the code you write belongs in the bizobj. Provide a method or methods in the bizobj to determine the choices for the 4 dropdowns based on the values of other fields. Provide a method or methods to return True or False whether or not the user is allowed to modify that field currently. Hook into biz.afterSetFieldVal() to catch when the user picks a different row in the listbox. The easiest way to let the UI know that it needs to update the display from the bizobj that I know of would be: self.Application.ActiveForm.update() Paul Oops? I don't see an afterSetFieldVal Johnf Sorry I'm dealing with an older version of Dabo. Johnf ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/201104070939.06119.jo...@jfcomputer.com
Re: [dabo-users] cascading dropdown controls selections
On 4/7/11 9:24 AM, John Fabiani wrote: Oops? I don't see an afterSetFieldVal Was added in r6233 on 2 Dec, 2010. Paul ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/4d9de8e8.8020...@ulmcnett.com
Re: [dabo-users] cascading dropdown controls selections
On 07/04/2011 18:24, John Fabiani wrote: ... Oops? I don't see an afterSetFieldVal http://thewinecellarbook.com/daboDocTestAlt/search.html?q=afterSetFieldValcheck_keywords=yesarea=default ;-) Werner ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/4d9debd1.2000...@free.fr
Re: [dabo-users] cascading dropdown controls selections
On 4/7/11 9:19 AM, John Fabiani wrote: I had not considered using the bizobj to control the choices. Mostly because I keep ui stuff out (I have exceptions) of the bizobj code. The bizobj wouldn't know anything about the UI, just what choices to present given the current values of fields in the bizobj. The self.Application.ActiveForm.update() does cross the line, though. But sometimes practicality beats purity. Paul ___ Post Messages to: Dabo-users@leafe.com Subscription Maintenance: http://leafe.com/mailman/listinfo/dabo-users Searchable Archives: http://leafe.com/archives/search/dabo-users This message: http://leafe.com/archives/byMID/4d9dec23.1040...@ulmcnett.com
