Delphi 7 app to web app conversion [Edit]
My company has an old Windows engineering application that we would like to convert to a web application so that we can offer it as a software as a service. The application is written primarily in Delphi 7 with the heavy number crunching done in Fortran (I did say it was old!). We would like to reuse as much of the existing Delphi code as possible and only modify the Fortran enough so that it will run in the background on the web server. We have never developed a web application so we're looking for guidance on the best way to make this conversion. Our questions at this point: 1. Is it realistic to expect that we will be able to reuse most of our Delphi 7 code? 2. We have about 60 forms in our application. What level of effort should we expect for an experienced Delphi programmer to make the conversion? Days? Weeks? Months? 3. Judging by the amount of activity in this forum it appears that many of you are successfully using IntraWeb for web application development. What are the strengths and weaknesses of IntraWeb? Should we consider other frameworks like Morfik, Raudus and WebHub? The website for our application is [here|http://www.cablecad.com] if you're interested. Edited by: Terry Shimabukuro on Dec 14, 2011 5:13 PM
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Terry
12/15/2011 1:14:54 AM
embarcadero.delphi.intraweb
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unigui
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hxh
12/15/2011 4:41:04 AM
<Terry Shimabukuro> schreef in bericht news:428977@forums.embarcadero.com... > My company has an old Windows engineering application that we would like > to convert to a web application so that we can offer it as a software as a > service. The application is written primarily in Delphi 7 with the heavy > number crunching done in Fortran (I did say it was old!). We would like > to reuse as much of the existing Delphi code as possible and only modify > the Fortran enough so that it will run in the background on the web > server. > > We have never developed a web application so we're looking for guidance on > the best way to make this conversion. > > Our questions at this point: > > 1. Is it realistic to expect that we will be able to reuse most of our > Delphi 7 code? > > 2. We have about 60 forms in our application. What level of effort > should we expect for an experienced Delphi programmer to make the > conversion? Days? Weeks? Months? > > 3. Judging by the amount of activity in this forum it appears that many > of you are successfully using IntraWeb for web application development. > What are the strengths and weaknesses of IntraWeb? Should we consider > other frameworks like Morfik, Raudus and WebHub? > I have coverted a D6 app to DXE and then to DXE+IW. The app was already heavy in html output (using Thtml - a sort of native webBrowser), had a dozen primary windows plus some support windows, no database but immense in-core tables and very heavy number crunching. 1. A big issue in moving to a web app is the implicit move from single user to multi-user. IW allows you to isolate all session variables but that may not be what you want. For instance, duplicating the tables was not an option my case. So they have to be multi-user / thread safe. 2. You can keep the UI more or less as-is but all forms need to be re-developed with IW components. Most of the event handling code can be re-used, except for one major complication: you don't have modal forms in a web-app (which will be a complication when transforming user input modules) and it is not trivial to have support windows without bothering the user with browser warnings or pop-up de-blocking. There are some complications when using form inheritance. This is all ill documented. You will find out. 3. IW's state of technology is great and it fits Delphi like a glove but AtoZed's organisational state is mediocre. Bug-fixes are regular but will fix only part of the bugs and introduce new ones. Documentation is lacking. Best to avoid the latest version, stick with IW11 and work around the still remaining bugs. 4. My conversion from XE to XE+IW took me four months or so plus another half year to work around the remaining IW bugs. But these only came out through user feed-back. The conversion from D6 to DXE was pretty trivial. 5. I have no experience with other web-dev tools. A decade ago I used web-broker and the likes. IW is uncomparable. You more or less think traditional Delphi and IW does all the translation for the web for you. Tom
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Tom
12/15/2011 9:09:46 AM
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