?
Solved

Canvas initialization..

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


Regards,

GOMF
0
Comment
Question by:GOMF
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
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
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 

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
 
LVL 5

Accepted Solution

by:
TheNeil earned 400 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

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

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

The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
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…
In this video we outline the Physical Segments view of NetCrunch network monitor. By following this brief how-to video, you will be able to learn how NetCrunch visualizes your network, how granular is the information collected, as well as where to f…
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…
Suggested Courses

770 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