Solved

TFont property

Posted on 2001-09-12
4
286 Views
Last Modified: 2013-11-23
Hi
I create component with object property (in particular TFont):

TMyComp = class(TLabel)
private
  FFont: TFont;
  procedure SetFont(Value: TFont);
...........
published
  property Font: TFont read FFont write SetFont;
end;

procedure SetFont(Value: TFont);
begin
  FFont.Assign(Value);
end;

Matter-of-course I create and destroy FFont into constructor and destructor.

Using this component the method SetFont is fired when I peform the next:

......
MyComp.Font := Form1.Font;
......

But how can I make SetFont to be fired in case of:

......
MyComp.Font.Size := 72;
......

It sets MyComp.Font.Size to 72 but I need some others actions to be peformed on this event.

Tanks in advance.
Vasily.



0
Comment
Question by:vterekh
  • 2
4 Comments
 
LVL 6

Expert Comment

by:OlegP
ID: 6478670
It is impossible
0
 
LVL 8

Accepted Solution

by:
TOndrej earned 50 total points
ID: 6478725
If you need notification when the font's changed use OnChange, e.g.:

TMyComp = class(...)
private
  FFont: TFont;

  procedure FontChange(Sender: TObject);
public
  constructor Create(AOwner: TComponent); override;
  destructor Destroy; override;
end;

procedure TMyComp.FontChange(Sender: TObject);
begin
  // do your other actions here
end;

constructor TMyComp.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FFont := TFont.Create;
  FFont := FontChange;
end;

destructor TMyComp.Destroy;
begin
  FFont.OnChange := nil;
  FFont.Free;
  inherited Destroy;
end;
0
 
LVL 1

Author Comment

by:vterekh
ID: 6478758
2 TOndrej

Thanks,
I've been trying to locate this in VCL but unfortunately I missed this technique.
0
 
LVL 8

Expert Comment

by:TOndrej
ID: 6478777
have a look at TCanvas for example
0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question