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ShowModal on Android

FireMonkey does a lot of work to allow you to write one set of code that compiles and runs on different platforms.

Not only that, it also does a lot of work to make many of the coding patterns that some of you are used to from the VCL on Windows, work unchanged on other platforms.

That’s great, but in some cases, re-using old patterns is not desirable. ShowModal is a case in point. Read On…

“No Code” Calculated Fields in RAD Studio and AppMethod

In Perth last week I was showing the new FieldOptions property on datasets. As part of the demo, I had to create a calculated field, and when I brought up the New Field dialog an audience member suggested I create an InternalCalc field instead.

I’d never heard of an InternalCalc field at the time, so later I did some research into what they are. In FireDAC they do everything a normal Calculated Field does, but in addition, you can define the value using the DefaultExpression property of the field, rather than having to write an OnCalcFields event handler.

Read On…

LiveBindings : How to treat an Integer field as a Boolean?

I had a question recently from someone, and it seemed a common enough requirement that I thought the solution might be worth sharing.

Let’s say you’ve got a database that has an Integer column which is really used as a Boolean. Zero for False, One for True. Further, for whatever reason, you can’t change the DB structure. How do you display this column to the end user as a boolean, so that they can use a Checkbox column in a grid, a TSwitch control, or similar to edit it? Read On…