If you need to manage distributed data over multiple locations then don’t miss the product address for InterBase! The next generation of InterBase is coming soon and will be super charged with a powerful new change tracking engine that makes managing distributed datasets a whole load easier!
Working with PDF and Office Documents using VCL and FireMonkey
In this session, we take a deep look into the all-new multi-format document processing toolset for Delphi from Gnostice. We take a brief look at architectural details of the product and then go into using the product. You’ll get to see real code examples for viewing, printing, converting and processing documents in Delphi VCL and FireMonkey on Desktop and mobiles devices. You’ll also see examples of document processing using the new Gnostice REST-based document server.
A column of a ClientDataSet can contain a dataset, a tabular structure containing one or more columns and zero or more records. This presentation continues Cary Jensen’s CodeRage series on ClientDataSets by looking at this power field type.
Level: All
Cary Jensen – Jensen Data Systems, Inc.
ClientDataSets are in-memory tables that have been in RAD Studio since Delphi 3, but there’s a new kid in town, the FireDAC FDMemTable. This presentation, by ClientDataSet expert Cary Jensen, compares and contrasts these in-memory table classes, providing you with guidance on which to use and when.
Level: All
Cary Jensen – Jensen Data Systems, Inc.
A Dark Pattern is a type of user interface that appears to have been carefully crafted to trick users into doing things, such as buying insurance with their purchase or signing up for recurring bills.
We developers have a big responsibility. Martin Fowler and Erik Dörnenburg (both ThoughtWorks) did a great presentation about that at the GOTO Aarhus 2014 Conference.
A quote:
“The developer who wrote that code is every bit as responsible as the person who told them to do it. You have a choice. You have a responsibility to ensure that your users are well treated and to reject dark patterns,” says Fowler. “We have a whole profession of people writing software and doing enormous things to change the way we live in the world.”
The Delphi MESSAGE directive is a very powerful one, you can generate compiler hints, warnings and errors with it, even fatal ones that abort compilation.
The compiler will return error codes H1054 (hint), W1054 (warning), E1054 (error) or F1054 (fatal error), which in the documentation are known under the catch-all x1054.
You need to take a bit of care with message directives, especially with the quotes. For instance
{$Message Error 'Not implemented'}
gives you the error below, but continues compiling:
[DCC Error] E1054 Not implemented
However, if you forget the single quotes
{$Message Error Not implemented}
it gives you error E1030 (not x1054), which is a bit confusing as it is a catch-all for invalid directives:
Delphi and 3rd party tools keep some of the settings in your %AppData% directory. Much more convenient than the registry as they are easier to read and modify when needed (also easier to damage <g>). We’ll start with an overview where various versions of Delphi store their configuration files, then show how the Favourites on the Welcome Page are stored, then end with an overview of BDS, Company Names and Product Names. Read the rest of this entry »