CODEWITHSUNDEEP
c++delphicomponentsc++builder
Gary Benade
Gary Benade

Reputation: 507

How can I visually design a component in C++ Builder?

I have been away from C++ for a couple of years now doing AS3/Flex work. I have gotten used to being able to create a component and place it in design mode with very little fuss and I am struggling to get my head around the C++ Builder way of doing the same thing.

I have written many components for C++ Builder in the past, but none of them have been visual. What I would like to do now is create a component for customer search and another for order processing because I want to be able to create a new instance of these on the fly. What I don't want to do is have to place each of the components like the dbgrid and search fields manually in code. I would like to do this (as well as set their properties) in design mode.

How do I go about this? I have browsed the source for other Delphi components and I notice they have dfm files which seems to be what I need. How do I do this in C++ Builder? The only option I see is to add a new form if I want a dfm, but this isn't what I want as my components will be based on TPanel.

Is there a way to do this or do I have to resort to doing it all in code with no visual reference?

Pursuing the DFM idea I did a test this morning where I created a component based on TPanel and added a new form to it which I create and parent in the constructor of the component. In design mode I set the form border to none and placed a grid on it. This all looks OK until I place the component in my application, at that point it looks like a panel with a standard looking form in it and the grid is missing. If I run the app the panel shows as expected, borderless and with a grid. The DFM appears to be ignored in design mode for some reason.

If you know a better way to do this than using components then please give me some pointers.

Any help and advice will be appreciated beyond words

Upvotes: 5

Views: 2595

Answers (2)

Ken White
Ken White

Reputation: 125620

Just as an FYI item, you can also drop the panel on a form, put any other controls on it, position them, set captions, etc..

Now, click the panel to select it, and use Component->Create Component Template from the IDE's main menu. This creates a unit you can install as a component which will add the panel and it's sub-controls (as a single component) to the IDE's component palette.

Of course, you can then modify the source for that new component like any other component source.

Upvotes: 4

Uli Gerhardt
Uli Gerhardt

Reputation: 13991

You might want to have a look at frames (look for "Frame objects"). They are "subforms" you can design visually and then place on forms.

Upvotes: 5

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