Dave Coventry wrote:
I have advised a Visual Basic user of the merits of Lazarus and he asked
"Yes, but can it do VOOE programming".
Actually, I don't know what VOOE programming is ;), but I thought I'd
pose the question anyhow
Well maybe it's 'Visual Object Oriented Engineering' --- e.g
Joost van der Sluis wrote:
On Tue, 2007-07-17 at 08:34 +0200, Bram Kuijvenhoven wrote:
German C. Basisty wrote:
I have now a form with a working TPQConnection, a TSQLTransaction, a
TSQLQuery with a ‘select * from product’ as SQL, a TDatasource, an a
TDBGrid, everithing is working fine and
German C. Basisty wrote:
I have now a form with a working TPQConnection, a TSQLTransaction, a
TSQLQuery with a ‘select * from product’ as SQL, a TDatasource, an a
TDBGrid, everithing is working fine and every product is shown on the
DBGrid as expected. Now I want to add an TEdit to make posibl
George Lober wrote:
I have this code which reads XML. I get a SIGSEGV error when reading a
NodeValue which has no content. For runtime it works ok because I put in
the try/except block, but this still produces error at design time which
is a nuisance. Any suggestions? Is there a way to check fo
Hugo wrote:
Hi! I want to write a Priority Queue but I can't find a TtdCompareFunc
in order to keep the priority queue properties
It is defined in the unit TDBasics. Just Google for it. It really gives a
faster response than a mailing list ;)
Bram
PS I hope you were planning to use the heap
compile my program.. run EAccesViolation ??? please help ;)
Allies Xposs wrote:
special for All Programers Lazarus...
sqlquery1.close;
sqlquery1.sql.clear;
sqlquery1.sql.add('select A,c_div,B.D_name,A.C_Code,A.C_Name from
Categori A left Join Divisi B on A,C_div=B.D_code order by
A.C_div,A.C
Graeme Geldenhuys wrote:
When I run my application which has two TListView component on it,
with no data - it just displays the form, I get loads of warning
messages to the console!!! Using GTK1 under Linux. Lazarus 0.9.23
r11312.
Am I supposed to start worrying, or can I ignore these for now.?
Arí Ricardo Ody wrote:
Self.Close;
How about Application.Terminate? Or Halt(0); ?
Bram
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fedorax wrote:
Selon Joost van der Sluis <[EMAIL PROTECTED]>:
On Sat, 2007-05-26 at 15:00 +0200, fedorax wrote:
I've a strange bug. In this fonction ( Which was worked perfectly from few
months an never chage ).
--
procedure TFunc_Sql.List_TablesSelectionChange(Sender:
Lee Jenkins wrote:
Allies Xposs wrote:
Thanks all...
Im confuse .. How to di This ? (Once Code Compile Anywhere)..
Im Use LAzarus under WIndows, but... i want compile my code can RUN IN
LINUX...
How...??
In addition to what the others said, consider using cvs to manage your
cross p
A.J. Venter wrote:
Var S1,S2,S3: TStringList;
FN : String;
begin
S1 := TStringList.Create;
S2 := TStringList.Create;
S3 := TStringList.Create;
If OpenPictureDialog1.Execute then
Begin
S1.LoadFromFile(OpenPictureDialog1.FileName);
S2.Add(EncodeB64(S1.Text));
S3.A
Hi A.J.,
If you create a standalone demo program that:
- reads in an image file
- calls your Base64Encode function
- next calls your Base64Decode function (i.e. leave out the DB stuff)
- writes the result to an output file (which is damaged)
and attach the image file, then I will take a look at i
A.J. Venter wrote:
This brings up a few questions though:
1) How can I store a string into a TMemoryStream ? I know that
TStringList has a loadFromStream method - but how d I go the other way
around ?
Take a look at TStringStream if you want a stream operating on a string.
For the purpose of s
Alvise Nicoletti wrote:
The error I'm having it's surely a library name problem:
Identifier not found "TMySQL40Connection" (I'm using 40 not 50).
I tryed with the code that Bram sent me on the mail next to this one...
and I got the same error.
Do you get this error from the compiler (CTRL+F9
Alvise Nicoletti wrote:
On windows with a graphical application lazarus created just the
commands you wrote there, on linux with a non-graphical application I'm
not compiling the same code.
With control+space on windows TMySQL50Connection is listed including
those units on the "uses" row, on li
Alvise Nicoletti wrote:
How do I use the SQLdb component without graphical interface? I just
have to do the same commands without putting the graphical component on
the project?
You can create the components in code, e.g.
Conn := TMySQL50Connection.Create(nil);
Qry := TSQLQuery.Create(nil);
Sébastien TACK wrote:
It's a miracle of Oriented Object Progamming !
StrToFloat can take a large type of value Single, Double, Currency.
Every method are overload.
Overloading methods is something different from polymorphism in object oriented
programming (where virtual methods are key in poly
Hi Andrea,
Andrea Mauri wrote:
I am using TSQLquery with a TIBconnection to an interbase database.
I have a query like this:
select
T1.ID, T1.FIELD1, T2.ID, T2.FIELD1
from TABLE1 T1
left join
TABLE2 T2
on T1.ID = T2.ID
If I use this query with TSQL query I get an error
duplicate fieldname ID
W
Roland Turcan wrote:
CONST MaxBitmaps=129;
TYPE TBack =CLASS
PRIVATE
FBitmaps :ARRAY [0..MaxBitmaps] OF TBitmap;
PUBLIC
PROPERTY Bitmap :TBitmap READ FBitmaps[0];
PROPERTY LightBitmap :TBitm
Roland Turcan wrote:
Hello [EMAIL PROTECTED]
Could you help me how to port this part of code into Lazarus from
Delphi 7:
TYPE TResamplingFilter =(rfBox, rfTriangle, rfHermite, rfBell, rfSpline,
rfLanczos3, rfMitchell);
TYPE TBitmapFilterFunction =FUNCTION (Value:SINGLE):SINGLE;
CONST FilterLi
Hi!
While experimenting with mouse clicks on ListViews, I also found the following:
when pressing the left mouse button on one control, but releasing it on another
control, Click and MouseUp events are generated differently depending on the
Control.
For example:
When MouseDown was on a Form,
Vincent Snijders wrote:
Graeme Geldenhuys schreef:
Hi,
Can someone confirm this before I submit a Mantis bug report.
Clicking on items in a ListView with vsReport style:
- If you click on the items 99% of the time the OnClick doesn't fire
- Clicking to the left of the last column (black space
Graeme Geldenhuys wrote:
Can someone confirm this before I submit a Mantis bug report.
Clicking on items in a ListView with vsReport style:
- If you click on the items 99% of the time the OnClick doesn't fire
- Clicking to the left of the last column (black space) then the OnClick fires
every
Pelle ten Cate wrote:
Dank je, Marco.
Still I don't know how to apply this command, just entering it on the
gdb commandline gives me a "Target 'None' cannot support this
command.". If I open gdb with the executable filename as first
argument, it gives the same error, but then Target 'exec' is
me
dayat wrote:
yes vincent, that's my intention. forgive I make friends become to
confuse. sorry, my english so poor.
Thank you for your reply.
On 4/3/07, *Vincent Snijders* < [EMAIL PROTECTED]
I understood the question in a different way.
To use an ODBC connection you need a DSN.
W
dayat wrote:
I am sorry, its intention make and vanish odbc of comand of freepascal
(I hope I more or less understand your question, and that you can understand me)
The TODBCConnection component is on the SQLdb tab of the component palette in
Lazarus. Drop it on a form just like a TButton. (I
dayat wrote:
SQLDB's ODBC very busy to finish the problem of me. otherwise there is a
way of is other, how to make and vanish DSN ODBC at windows
On the Control Panel (Win 9x/ME) or Control Panel -> Administrative Tools (Win
XP) there is a 'Data Sources (ODBC)' item. You can create new DSNs he
Darmawan Sugiarto wrote:
Congratulation
Lazarus 9.0.22 is already solve this problem thanks to developer
I can confirm the similar problems with MySQL/MyODBC also disappeared in
0.9.22! Great work. Note to self: next time test with trunk version of Laz too
:)
Regards,
Bram
Joost van der Sluis wrote:
On Thu, 2007-03-29 at 14:52 +0200, Bram Kuijvenhoven wrote:
Darmawan Sugiarto wrote:
It's OK... now I know If I don't have this error if I compile my code in
first time... but the second, third, and soon I have this error... So I
restart Lazarus and my
Darmawan Sugiarto wrote:
It's OK... now I know If I don't have this error if I compile my code in
first time... but the second, third, and soon I have this error... So I
restart Lazarus and my code work clearly...
If I run my exe (without lazarus) I don't have this error...
Hmm, that's intere
Ger Remmers wrote:
I would like to add a numeric property, ObjectNumber, to TObject (for my
internal use only).
This property needs to be read/write and default to 0 (zero).
How/where do I go about doing this?
Another, more general alternative than using TComponent.Tag: use a separate
hash ta
Pieter Valentijn wrote:
TJanXml is a opensource XML parcer in Delphi made by Jan Verhoeven He is
a Ducth man who inspired me sometime ago to make opensource my self.
It is spelled 'parser' with an s :)
Bram
_
To unsubscribe:
George Lober wrote:
A question guys. Are there any utilities/functions out there to convert
a pascal record type into XML format and back? Is there such an animal,
or am I asking for too much?
Not for as far as I known, but I think you could either
- use classes with published methods & RTTI;
Jeff Steinkamp wrote:
Jeff Steinkamp schreef:
Anyone know why I might be getting an Illegal Expression on a line containing
the keyword Exit?
Can you post a snippet of code?
Compiler fails at the Exit keyword.
procedure TForm1.SaveAsExecute(Sender: TObject);
begin
savedialog1.InitialDir
Christian Ulrich wrote:
It would be very nice if people could edit documentation in a
convenient way such as a wiki; this is an improvement over sending
.xml help file patches. On the other hand it is also important that
the documentation is correct and coherent, particularly in its role as
a
Vincent Snijders wrote:
About translations, I always feel awkward reading Dutch translations of
programming related documents and most of the time I need to translate
them back to English (mentally) to understand them. So as far as I am
concerned translating is not necessary. Other people disag
Bisma Jayadi wrote:
I'm the person who reported the supposed bug. But after the
explanation of a peer, i agreed that was a bug/misbehavior of Delphi.
So i'm favorable as not considerating as a bug but as a "difference"
that should be considered when porting a Delphi app. I think that we
should
Hi Arí!
Arí Ricardo Ody wrote:
As I have troubles to remember the TAR functios and options I'm trying
to develop a graphical front end to run it. Then I need to select files
and/or directories from a visual dialog.
Is there a way to do this via Lazarus components?
Maybe a custom TTreeView d
A.J. Venter wrote:
That seemed to work fine - except it turns out that MD5 is even LESS reliable
than I thought, at least on small data.
I had a bug report (and confirmed it) that you can log into anybody's account
if you simply know how many characters his password has.
Apparently '123456' g
Juan Martinez wrote:
Object and Class declarations are very similar but, are they really the
same?
My concern is about smart linking. If I use Object instead of Class,
will it takes less memory to smart link? I heard that Object is more
close to a record than to a Class, is it true?
Object
Christian Budde wrote:
I've found a solution, but I'm maybe too stupid to create a patch, so
here is the manual patch:
Fortunately creating patches isn't as hard is it might seem to be!
Assuming you adapted the sources in a local checkout of the SVN repository, run
(from the directory where y
Alexandrov Alexandru wrote:
Instead of Math unit, better add a function:
function min(i,j: integer): integer;
begin
Result := i;
if j
- it is more likely the Math.Min function is optimized (e.g. asmed, inlined)
- it is most likely the IDE already uses the Math unit somewhere
My conclusion: u
Nataraj S Narayan wrote:
I havent succeeded in getting ODBC for MySQL working. But other native
SQLDB compos are working for MySql 4.1.1.
The following (from your other mail)
object MySQL41Connection1: TMySQL41Connection
DatabaseName = 'weberp'
Password = 'rambo1'
UserName = 'ODBC'
Nataraj S Narayan wrote:
Plz suggest me which is the best package to connect to Mysql 4.1.11
server?
If the MySQL components don't work for you, you can try the TODBCConnection
component.
Please note that you need the TODBCConnection.Params property to set connection
parameters like
'SERV
Zlatko Matić wrote:
Could someone send me some screenshots,code or examples showing how
to implement ODBC connection with PostgreSQL in Lazarus, on Windows?
Thanks in advance,
To know which properties the TODBCConnection component supports, look at the
comments in the source (they are next to
George Birbilis wrote:
If so, what side-effects would this cause when applied across the
complete class-hierarchy?
Blow up the size of you executable.
And a virtual method call is slower than a non-virtual call.
(as it needs to do a few lookups: class, VMT)
To ensure self is not nil, you can i
George Birbilis wrote:
Regarding the stuff I say below though, not sure what "self" contains
(at the someClassMethod code body) when you do
someInstance.someClassMethod() instead of someClass.someClassMethod().
Does it always contain the class self or the "someInstance"? (be it nil
or not). I'
Al Boldi wrote:
Bram Kuijvenhoven wrote:
function TAncestor.ToStringSafe:string;
begin
if self=nil then Exit('');
Result:=ToString; // now it's safe to call the virtual method
end;
Are you sure it's really safe to call?
I think so: function ToStringSafe:st
Alexandre Leclerc wrote:
How would you compare Lua with PascalScript? I was thinking to
implement pascal scripting later in my project.
I have no actual experience with PascalScript, though I read the webpage on the
remobjects website. I also considered PascalScript for my application, but
ch
For the FPC part:
[EMAIL PROTECTED] wrote:
What is the status of dynamic link libraries/shared objects:
1. Does FPC currently supports loading a shared library and calling a
function/procedure from a program ?
Yes,
- declaring functions/procedures as external 'name_of_dll'; (will create a
de
Alexandre Leclerc wrote:
I'm looking for an expression evaluator that is able of the following
(and works under fpc - I tried TExpressionParser from Egbert van Nes
but even if it compiles, it doesn't works... unless this is me not
using it properly):
Recently I've been looking at the scripting
David B Copeland wrote:
Does anybody know if there are bugs in running Querys throught ODBC
against MySql (4.1) tables with DATE field with a value of 0. I am using
Lazarus SVN Revision 9406M with FPC 2.0.2, and when I Open the Query I
get the error message "37904-2097-57345 is not a valid date
s
erformance penalty if the compiler would insert a
non-nil check in every non-virtual method. Allowing nil pointers gives more
flexibility to programmers.
Bram Kuijvenhoven wrote:
Michael Van Canneyt wrote:
If so, what side-effects would this cause when applied across the
complete class-hie
Michael Van Canneyt wrote:
If so, what side-effects would this cause when applied across the complete
class-hierarchy?
Blow up the size of you executable.
And a virtual method call is slower than a non-virtual call. (as it needs to do
a few lookups: class, VMT)
To ensure self is not nil, yo
Alex du Plessis wrote:
Would anybody know why a sqldb query (TSQLQuery) has a problem reading
an aggregate field? I cannot get the query to read an aggregate field
for love or money. It complanis that it cannot find the fieldname
(query.FieldbyName('sum').asInteger) or that the
index(query.F
Al Boldi wrote:
Mattias Gaertner wrote:
Al Boldi <[EMAIL PROTECTED]> wrote:
Mattias Gaertner wrote:
Al Boldi <[EMAIL PROTECTED]> wrote:
Flavio Etrusco wrote:
On 6/3/06, Al Boldi wrote:
In the fpc-rtl there is something like this:
procedure TObject.Free;
begin
if self<>nil then self.destr
Hi,
I noticed that recently some people sent emails with Read Confirmation Requests
(also called Return Receipts). This is annoying for a mailing list.
The problem might be that settings for these requests are usually global (or
per-account) in email clients. This can be a problem for people t
David B Copeland wrote:
I've partially solved my problem. I can create a dummy ODBC datasource,
then in Lazarus add the real database name to the Params of the
ODBCConnection object.
I do not exactly understand your original problem, but you surely need to add
the database name to TODBCConnect
piltdown wrote:
Using Lazarus 0.9.8 when I enter, for example, label1. instead of getting a
list of possible completions I get a list of properties and functions
followed by a series of vertical lines - and that's it. If I hover the
mouse over any of the items a label appears saying "dummy".
Ho
Arí Ricardo Ody wrote:
At 14:03 4/4/2006, you wrote:
That's because UpdateIndexDefs isn't defined.
It remains being a mistery for me. Since RDBMS is who manage index(es)
and key(s)...
In order to construct sensible WHERE clauses of UPDATE and DELETE statements,
SQLDB needs to know which c
Joost van der Sluis wrote:
It sounds strange to me the phrase "All things above do work", mr.
Joost. Would I lose a pointer during the conversations?
DB2 is another story as the other natively supported databases (mysql
4.0, 4.1, 5.0, Firebird, PostgreSQL and Oracle). The ODBC-connection is
not
Arí Ricardo Ody wrote:
After install the snapshot version I had success in doing a browse in
DB2 tables. There was new errors that I report below in the way people
can try to fix them:
1. Any update in table(via INSERT, UPDATE or DELETE) generates a empty
Message Dialog. I'm talking about an
Michael Van Canneyt wrote:
On Tue, 28 Mar 2006, Arí Ricardo Ody wrote:
Will someone of you try to solve the DB2 trouble that we discussed here?
We need to apply the patch first.
I do not oppose against applying the patch :), but I already pointed out the
issue itself should already be resol
Bram Kuijvenhoven wrote:
Or, Arí has an older odbcconn, where SQL_TIMESTAMP was mapped to
ftTimeStamp, which in turn has no FieldClass associated with it, giving,
on closer inspection, the same error -- 'Unknown field type'!.
In a private mail, Arí told me he has Lazarus 0.9.12.
Arí Ricardo Ody wrote:
First, thaks to everyone that post msgs trying to answer my questions.
I have a weak skill in Lazarus/Pascal if compared with people like you. I can't
understand why you don't solve the trouble instead of try to send the correct
msg error.
As John suggested, I don't ha
Michael Van Canneyt wrote:
Looking in the ODBCConnection, I would suppose that the DB2 Timestamp is
translated to SQL_TYPE_UTCDATETIME:
SQL_TYPE_UTCDATETIME:FieldType:=ftUnknown;
SQL_TYPE_UTCTIME: FieldType:=ftUnknown;
As you can see, they are not recignized by the ODBC connection
Bram Kuijvenhoven wrote:
I'll be right back with a version of odbcconn that tries giving a more
meaningful error using the sqlGetTypeInfo API call. Arí can also use
this to give us more information, that can help us finding out what is
actually going wrong.
Here's the patch.
od
Bram Kuijvenhoven wrote:
Michael Van Canneyt wrote:
Looking in the ODBCConnection, I would suppose that the DB2 Timestamp is
translated to SQL_TYPE_UTCDATETIME:
SQL_TYPE_UTCDATETIME:FieldType:=ftUnknown;
SQL_TYPE_UTCTIME: FieldType:=ftUnknown;
I guess that at the moment I wrote
Michael Van Canneyt wrote:
> Ok, so first of all the error message is somehow wrongly formatted,
instead of giving the ODBC field type, it only contains the field name
(it must do that too, of course), but fails to return the actual
'unrecognized' field type.
Looking in the ODBCConnection, I wou
Panagiotis Sidiropoulos wrote:
After testing sqldb and could not make it work for me, I installed and
try with TMySQLDatabase and TMySQLDataset found in
lazarus/components/mysql folder. Proper package version installed
related to Mysql server version.
TMySQLDatabase succesfuly connect to the ser
Felipe Monteiro de Carvalho wrote:
You don't need a Firefox API to do this. Just send the shell command:
"mozilla-firefox www.google.com" and if firefox is already open, it
will open the page without opening a new instance. I tested here, try
on your command line with firefox already open. If you
SteveG wrote:
Could anyone tell me what I am doing wrong with the following line
SqlD := TSqlConnection.Create( NIL ); - generates -> Warning:
Constructing a class "TSQLConnection" with abstract methods
I am using (trying to anyway) the SqlDb unit directly, not as an
installed component (no
Alexander Todorov wrote:
I am using SQLdb 1.0 / Lazarus 0.9.8 / FPC 2.0.1 on Windows XP with
Firebird 1.5 database.
When a statement like
INSERT INTO TEST (ID, DATAFIELD) VALUES (1, 'this :is a :test') is
executed i get an error.
The problem is that values after the colon ':' characters are parse
Hi,
There are still some problem with the text cursor in the Source Editor. (see
bug http://www.lazarus.freepascal.org/mantis/view.php?id=1525)
When e.g. scrolling with the mouse wheel, the cursor isn't moved with the text,
but remains at the same position in the screen. When typing or moving
Prof. Paulo Amaral wrote:
By the way, I write the data using the following code in the event
"after post":
begin
SQLQuery1.ApplyUpdates;
SQLTransaction1.Commit; //In this moment, after commit, the query
is closed !!!?
SQLQuery1.active:=true;//So, I have open it !!!? This does to
Prof. Paulo Amaral wrote:
The problem is that these examples use "select" for ends of exhibition
and navigation of data in forms with dbedits, dbnavigator, etc. The
"update" or "insert" use with DbAware controls does not have example
showing. When you edit and write a register using dbnavigato
Vincent Snijders wrote:
Jani Mátyás wrote:
I think someone who can edit the FAQ on the lazarus website should add
this to the FAQ, just to avoid these questions.
Thanks.
Feel free to update:
http://wiki.lazarus.freepascal.org/index.php/Lazarus_Faq#General
I think it should not be mentioned
Tim Laurent wrote:
What about creating a window *without* a title bar first, then adding a
title bar to it and interpret the height difference as the height of the
title bar? I think this could even be done offscreen and Lazarus could
do that during startup ...
Lol :) You must be kidding :)
Luis Francisco Araya wrote:
Florian Köberle wrote:
What do you think about using a wiki for explaining what a error
message means. These pages are then called when the user press F1 in
the error message window.
I think it is a good idea, maybe something like www.php.net when they
explain wha
Felipe Monteiro de Carvalho wrote:
I´ve just seen that lazde is only for the LCL Documentation. So this
seams to be the case of creating a new wiki page.
It is not only for the LCL, but it can be used for documenting any pascal
program of unit. LazDE (residing in the doceditor subdirectory on
John Jewitt wrote:
I've written a Delphi 3 application that uses Active X to control MS IE
from within a form.
I'd like to port it to Lazarus/Linux/Mozilla but I am unsure where to
start.
I've looked at gtkmozembed on the Mozilla site but it has not helped
much as I'm unsure how to use a GT
Uwe Grauer wrote:
Maybe this helps?
Here is my debug window:
(from Lazarus, I assume?)
<-gdb-set env ALLUSERSPROFILE=C:\Documents and Settings\All Users>
^done
It seems your Lazarus version does set Environmental variables correctly?
<-data-evaluate-expression FPC_THREADVAR_RELOCATE_PROC>
Uwe Grauer wrote:
Yes, i'm using Firebird. It crashes when running under gdb.
Even in a small Firebird app? I don't have a Firebird db running at the time,
nor do I have Lazarus compiled with the sqldblaz package. So it would take some
effort to test your program. I hope you can find the caus
Uwe Grauer wrote:
Would it help finding a solution of my debugging problem if i post some
code?
That can help, but please first reduce as much as possible the amount of code
in which the problem still occurs. Also note that we don't have your database
running...
Bram
___
Uwe Grauer wrote:
Standalone my program runs ok, under gdb it crashes.
My program runs fine when run from gdb. So it seems your programs crashes for
another reason than the failure of the mysqltest program.
BTW what command line options does Lazarus pass to gdb?
Perhaps you can also try anot
Uwe Grauer wrote:
There was no reply for my question. So i will ask again.
If i run my Database Application stand alone, it works OK.
If running under lazarus, it is freezing (Program doesn't respond any more)
What could be the reason?
My first thought: Does your program also crash when you run
Tom Verhoeff wrote:
Is there a good&easy way to keep two FPC versions next to each other?
There is, as Vincent explains. You should however keep in mind to compile your
Lazarus (or in fact the LCL) with the same compiler as your project (that uses
the LCL), or you will probably get an error l
L505 wrote:
I still don't know what it is though.
I've always wondered what that thing was. I've heard people using it and say
it's great. But for their marketing and sales section (lol), they desparately
need some screenshots on the front page, because I can't figure out what it is.
The followi
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