Solved

Canvas initialization..

Posted on 2000-02-15
10
213 Views
Last Modified: 2010-04-04
does a canvas differ in initialization from D3 til D5 ?


Regards,

GOMF
0
Comment
Question by:GOMF
10 Comments
 
LVL 6

Expert Comment

by:Jaymol
ID: 2522908
Not in the slightest.

John.
0
 
LVL 5

Expert Comment

by:TheNeil
ID: 2523063
The canvas is the same. There are a couple of extra features at the bitmap level but nothing that will stop your code from compiling or working

The Neil
0
 

Author Comment

by:GOMF
ID: 2523067
lol, maybe i wanna elaborate on the subject a bit...
I moved a unit to D5 from D3 - and now I've got a problem..I've got 2 classes and the later inherits from the first

the first declaration
  TPreviewCanvas = Class(TObject)
  .....
  Public
    Procedure AnotherPage; Virtual;
  .....
 
The later class,

  TPrnCanvas = Class(TPreviewCanvas)
  ....
  Public
    Procedure AnotherPage; Override;
  ....

What happens in D5 when you run this ? Nothing the procedure Another does never execute, eventhough its called...any ideas ?



Regards,GOMF
0
 

Expert Comment

by:garizpe
ID: 2523128
Ok... What happens with your programs i don´t have problems with D5
can you be more specific....
0
 

Author Comment

by:GOMF
ID: 2523142
garizpe,

Var
  vc : TPrnCanvas;
Begin
  With vc do
  Begin

    OnPageTop        := NIL; // executes
    OnPageBottom     := NIL; // executes
    AnotherPage;  // DOES NOT EXECUTE!!
    SetFontSize(20);
    Font.Style := [fsBold];
  End;


Really weird...!!

Regards,

GOMF
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 5

Accepted Solution

by:
TheNeil earned 100 total points
ID: 2523205
What is AnotherPage supposed to be doing? and why are you using vc without creating it first?

The Neil
0
 
LVL 12

Expert Comment

by:rwilson032697
ID: 2524654
Listening
0
 

Author Comment

by:GOMF
ID: 2525878
hehehe, yeah why try to create it before using it..lol...

*blush*

Regards,

GOMF
0
 
LVL 5

Expert Comment

by:TheNeil
ID: 2526159
I'll pretend that I actually proposed that as an answer rather than as a general stab in the dark. Thanks

The Neil
0
 

Author Comment

by:GOMF
ID: 2526261
hehehe, lol...

Regards,

GOMF
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

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…
Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
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.
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.

863 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

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now