BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  model of development          BorlandTalk.com Forum Index -> Delphi OO design View previous topic :: View next topic   Author Message Ronaldo Rezende Vilela Lu Guest Posted: Tue Jul 15, 2003 12:34 pm    Post subject: model of development I agree that the best pratice to do is develope the system using an design pattern such MVP and a OPF. My problem is the OPF. I'm developing in Kylix. I don't have time and money to create or by an OPF. So, I'm developing with ClientDataSets, DataModules and CLX Data Controls. Each of my object has: two datamodules (server and client. but in real world my application has only two phisical tier. My application will create only one serverDataModule and one ClientDataModule for each object created.); * a register property (clientdataset with all fields used by formEditor, to insert and edit records. This cds requires the primary key to locate the record or null values when is used to insert record.); * a index property (clientdataset with only fields necessary to find a record. e.g.: the name of the customer. this is used by the SearchForm); * a form used to edit and insert records; * a a form used to locate records; (in this form, several objects of the same class can be created, to create several EditForms. When I create forms, I pass the DataSource of the object as parameter to form. So, the form will use the dataSource of the object that is creating the form. So, in this model that I'm trying to create, the object has the form, and not the form has the object. Each "DBForm" will have the DataSource, that will receive as a parameter of DBForm's constructor. Is there any sugestions or comments in this model of development? -- Ronado Rezende Vilela Luiz Uberaba, MG - Brazil Back to top Cosimo De Michele Guest Posted: Wed Jul 16, 2003 6:23 am    Post subject: Re: model of development Take a look to DePO. http://sourceforge.net/projects/depo Best regards Cosimo De Michele "Ronaldo Rezende Vilela Luiz" <ronaldinho79 (AT) bol (DOT) com.br> ha scritto nel messaggio news:3f13f3a3 (AT) newsgroups (DOT) borland.com... Quote: I agree that the best pratice to do is develope the system using an design pattern such MVP and a OPF. My problem is the OPF. I'm developing in Kylix. I don't have time and money to create or by an OPF. So, I'm developing with ClientDataSets, DataModules and CLX Data Controls. Each of my object has: two datamodules (server and client. but in real world my application has only two phisical tier. My application will create only one serverDataModule and one ClientDataModule for each object created.); * a register property (clientdataset with all fields used by formEditor, to insert and edit records. This cds requires the primary key to locate the record or null values when is used to insert record.); * a index property (clientdataset with only fields necessary to find a record. e.g.: the name of the customer. this is used by the SearchForm); * a form used to edit and insert records; * a a form used to locate records; (in this form, several objects of the same class can be created, to create several EditForms. When I create forms, I pass the DataSource of the object as parameter to form. So, the form will use the dataSource of the object that is creating the form. So, in this model that I'm trying to create, the object has the form, and not the form has the object. Each "DBForm" will have the DataSource, that will receive as a parameter of DBForm's constructor. Is there any sugestions or comments in this model of development? -- Ronado Rezende Vilela Luiz Uberaba, MG - Brazil Back to top Cosimo De Michele Guest Posted: Wed Jul 16, 2003 7:18 am    Post subject: Re: model of development I'm working on it, in september there will be new version with complete documentation!!! Best regards Cosimo De Michele "Paul Nicholls" <paul-nicholls (AT) hotmail (DOT) com> ha scritto nel messaggio news:3f14f8bf (AT) newsgroups (DOT) borland.com... Quote: Is there an English version of the 'DePO How to'? The only one I can find is in Italian... "Cosimo De Michele" <cdemichele (AT) tiscalinet (DOT) it> wrote in message news:3f14f03d$1 (AT) newsgroups (DOT) borland.com... Take a look to DePO. http://sourceforge.net/projects/depo Best regards Cosimo De Michele Back to top Paul Nicholls Guest Posted: Wed Jul 16, 2003 7:25 am    Post subject: Re: model of development Thanks, and I'm not trying to rush you :-) "Cosimo De Michele" <cdemichele (AT) tiscalinet (DOT) it> wrote Quote: I'm working on it, in september there will be new version with complete documentation!!! Best regards Cosimo De Michele "Paul Nicholls" <paul-nicholls (AT) hotmail (DOT) com> ha scritto nel messaggio news:3f14f8bf (AT) newsgroups (DOT) borland.com... Is there an English version of the 'DePO How to'? The only one I can find is in Italian... "Cosimo De Michele" <cdemichele (AT) tiscalinet (DOT) it> wrote in message news:3f14f03d$1 (AT) newsgroups (DOT) borland.com... Take a look to DePO. http://sourceforge.net/projects/depo Best regards Cosimo De Michele Back to top Ronaldo Rezende Vilela Lu Guest Posted: Wed Jul 16, 2003 10:31 am    Post subject: Re: model of development Cosimo De Michele wrote: Quote: Take a look to DePO. http://sourceforge.net/projects/depo I already have a look in DePO some months ago. In my opinion, the ClientDataSet has many advantages such work with all data in the client with no transaction open in server. Another advantage is the facility to migrate to 3 tier model. The DePO can be used in Kylix? If I decide to use DePO I must spent time coding it? Or DePO already can be used in projects ? -- Ronado Rezende Vilela Luiz Uberaba, MG - Brazil Back to top Cosimo De Michele Guest Posted: Wed Jul 16, 2003 11:34 am    Post subject: Re: model of development Quote: The DePO can be used in Kylix? Yes, it is used Quote: If I decide to use DePO I must spent time coding it? DePO is incomplete! But the sql engine core is stable. Quote: Or DePO already can be used in projects ? DePO is used in almost two project! 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