Tag Archives: LiveBindings

Intermediate

LiveBindings for VCL Developers – Webinar!

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LiveBindings for VCL Developers [Webinar]

Visual LiveBindings is a technology that allows you to bind your data and objects (model) to the UI making. While LiveBindings is a key part of FireMonkey development, it is often overlooked by VCL developers.

A while ago I started a series of blogs on LiveBindings and how to use them with existing VCL applications. Covering seven blog posts, I looked at

  1. LiveBinding to DataSets
  2. LiveBinding to Objects
  3. Creating LiveBindings via Code
  4. Master Detail relationships (and objects as properties)
  5. Advanced Master Detail Relationships
  6. Mashing up Master Detail on different sources
  7. Helpful classes for LiveBindings

Following a high amount of demand and questions, you now have you chance to see me present live on this topic and ask your LiveBindings questions. Join me on Wednesday 31st August at 10am GMT.

Register now via community.embarcadero.com

The webinar will be followed by the live Q&A session.

Intermediate, Objective Pascal

LiveBindings in VCL – Part 7 – More LiveBinding Classes

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In my earlier posts on Delphi Visual Live Bindings I looked at how to link to bindings via code.

There are a number of classes that help along the way but there are two specific categories of classes and that is what I want to cover in this post.

LiveBindings and List v Link

Sometimes you want to fill a list with values; sometimes you want to keep a list of values updated; this is in essence the difference between using List (e.g. TBindList, TBindGridList) and Link (e.g. TBindListLink, TBindGridLink)

TBindList will fill a list with values, if the data/objects linked to changes then the data will not update unless you manually tell the list to re-populate using the bindings FillLists property.

TBindListLink however will keep the list in sync.

Before you continue… look at the samples

I recommend playing with the “OneOfEach” sample in the samples directory.

{samples}\LiveBindings\oneofeach\vcl

Try changing the fish name in the TBindGridLink and seeing how it updates over the other tabs where the FishFacts data is used.

What is a Binding Source and how is it different to the Control?

Continue reading LiveBindings in VCL – Part 7 – More LiveBinding Classes →

Advanced, Intermediate, Objective Pascal

LiveBindings in VCL – Part 6 – Master Object, Detail TDataSet

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Useful background to this post is available in post 4 (Linking to an Object for master detail) and post 5 (advanced master detail).

Filtering a TDataSet as detail of an object

Having explored how to link to a Master Detail relationship and created a funky anonymous method to return the data, I thought there is no reason why I should have to be returning linked data. The data could be from anywhere.

One example people have asked about when I’ve been at developer events is how to link an object to be the master for filtering a TDataSet… well, this actually provides a simple example for doing exactly this (as you can see in this video)

Continue reading LiveBindings in VCL – Part 6 – Master Object, Detail TDataSet →

Advanced, Objective Pascal

LiveBindings in VCL – Part 5 – Advanced Master Detail Objects

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Please read LiveBindings in VCL – Part 4 – Master Detail before reading this blog / watching the video

In the last blog we looked at how to use master detail and how the BeforeScroll and AfterScoll events worked. I also created using Generics a Sync Object that allowed a single detail object to be linked to.

As promised, this blog post takes it a step further, using the previous foundation I have updated the code (so make sure you download the latest version from code central from the link below) to allow multiple objects of different types to be linked. Additionally, detail lists are also now available.

Link to code sample below…
Continue reading LiveBindings in VCL – Part 5 – Advanced Master Detail Objects →

Advanced, Intermediate, Objective Pascal

LiveBindings in VCL – Part 4 – Master Detail and Objects as Properties

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This is the 4th video and blog in a series on using Visual LiveBindings mixed into existing VCL applications. 

In my last post, we looked at how to bind directly in code, using some common Visual LiveBinding Classes and in the next post we will look at more classes that can be used and the difference in the bindings they create. However before we get there a number of you asked about binding to master detail and sub objects. So lets explore this matter.

More in the blog post.

Continue reading LiveBindings in VCL – Part 4 – Master Detail and Objects as Properties →

Intermediate, Objective Pascal

LiveBindings in VCL Part 3: Bindings via code

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This is the third post of a series looking at using VCL and LiveBindings. This posts will expand on post 2 and dynamically create via code the LiveBindings at run time.

In my second blog post on Using LiveBindings in a VCL application, I looked at using the Prototype bind source for the first time and how it can be used to link objects to screens. But what if you need to work this out dynamically?

Dynamically linking to objects is possible if you create the LiveBindings at run time and in this video I show how to easily work out the components and properties you need to setup. This post builds on what was learned in the previous posts VCL LiveBindings and DataSets and VCL LiveBindings to Objects

Continue reading LiveBindings in VCL Part 3: Bindings via code →