For ExpMovAvg, there is the code TChart1.Series(1).FunctionType.asExpMovAvg.IgnoreNulls = True to ignore the nulls, but for ATR, I didn't find anything after FunctionType (There is FunctionType.asADX for ADX,but nothing for ATR), so how to do that for ATR, thanks. (I use Teechart2011 Eval & VB6)
I'm afraid the IgnoreNulls property doesn't exist for this function type. Since TeeChart ActiveX is a wrapper from TeeChart VCL version, I've added it to the VCL wish list to be implemented in next versions (TV52016368).
In the meanwhile, the only way I can think of to achieve the same is to completely remove the null points from the source series.
Related
I'm trying to connect my Windows XP program (Lazarus) to my Ubuntu postgres server.
When the Lazarus program runs, it seems to compile fine but I get this error:
Project ... raised exception class 'RunError(211)'.
Then it terminates execution (and I don't see any output), and opens up a file customform.inc. In that file, it shows a procedure procedure TCustomForm.DoCreate; where it highlights a line: if Assigned(FOnCreate) then FOnCreate(Self);
I believe this is one of the system's files.
I never get to see any output.
What could this be? Thanks!
MORE INFO:
I've narrowed down the error to this line:
dbQuery_Menu.SQL.Text:='Select * From "tblMenus"';
dbQuery_Menu.Open;
the exception is triggered when the OPEN statement gets executed.
BTW, dbQuery_Menu is defined as a TSQLQuery component.
Clueless! :(
Run error 211 appears when you try to call an abstract method. Check this link from more information on FreePascal/Lazarus runtime errors.
Since you say all is done by code and you have no visual components, the problem probably lies in your code trying to use an ancestor component which has not overriden the Open method. You should be able to solve this by using the correct descendant component.
Another possibility, although I would strongly recommend to avoid this one, is to override the Open method yourself. It should be avoided because if you are using an ancestor component then you probably would have to override more abstract methods.
HTH
After nearly 5 days I found the answer. Many thanks to all thos e ho have contributed with their ideas ESPECIALLY RRUZ, RBA and Guillem Vicens. there are other related posts all connected to getting the FIRST Lazarus program working with PostgreSQL.
Summary.
The biggest mistake I made here was that I used the TSQLConnection component. Don't do this. Instead use the TPQConnection.
Everything is done through code. We're not using any draggable components from the top tab.
Don't rely on the Lazarus docs (wiki) at least for working with PG DBs.. It is outdated. Some of the examples can be pretty misleading.
Make sure that fields have some default values. For example, if a Boolean field has no true or false (t/f) set, this may lead to errors.
And that's it! I hope many postgres+Lazarus newbies will find this useful.
From here - http://www.network-theory.co.uk/docs/postgresql9/vol2/SQLSTATEvsSQLCODE.html - -211 (ECPG_CONVERT_BOOL) This means the host variable is of type bool and the datum in the database is neither 't' nor 'f'. (SQLSTATE 42804)
I found this directive declared in Controls.pas (and also in other units) and I'll be glad to know what does it mean.
{$C PRELOAD}
As far as I know $C means assertions control but what is the PRELOAD keyword ? Is it something like "assert me at preloading time" ?
I found this in Delphi 2009
Thank you
The $C directive is called Code segment attribute and in conjuntion with the keywords MOVEABLE, FIXED, DEMANDLOAD, PRELOAD, DISCARDABLE, PERMANENT changues the attributes of a code segment.
{$C MOVEABLE DEMANDLOAD DISCARDABLE} // this is setting Code Segment Attribute.
if you use the $C directive with a + or - you are using enabling or disabling the generation of code for assertions.
example :
{$C+} { Assertions - On }
{$C+} and {$C-} are for assertions. {$C PRELOAD} is a carryover from 16-bit programming, where it preloaded the unit's code segment into memory immediately at runtime instead of waiting for the segment to be accessed first. That became unnecessary in Delphi 2 when 32-bit programming came around, so I don't know why the VCL source is still using it.
I'm working in a Delphi IDE expert and I wonder if it's possible add new items to the code completion combobox displayed by the Delphi IDE when the user press CtrlSpace
UPDATE:
What I need is add items to the code completion list based in a specified type.
example suppose which I have a type called TMytype, what I want to do is add addional items to the code completion list when the user type a variable of the type TMytype
check this image
I found your question somewhat confusing but if you are in search of credible source on "Custom Live Templates" and the like on Delphi, head to the blog of Cary Jensen here.
Edit:
Looking forward to further improvement of the scope of the question, I suggest here another direction to explore:
Source code manipulation using IOTAEditor, IOTASourceEditor, IOTAEditReader and the like
Some Parsing for sanity check prior to apply any modification.
Adoption of Client DataSet as a format to store data (It's serializable) to simplify the coding of IDE editors.
Perhaps I haven't fully grasped the extent of what you are asking here, but you can add templates simply by going to 'View|Templates' from the Delphi IDE. This then opens a template viewer. Press the '+' icon. It opens a template1.xml document which you can then edit so create your new item.
If you wish to do this programatically, just add an xml file (of the same format) to the ..\RAD Studio\code_templates folder.
I'm trying to get rid of some hints(*) the Delphi compiler emits. Browsing through the ToolsAPI I see a IOTAToolsFilter that looks like it might help me accomplish this through it's Notifier, but I'm not sure how to invoke this (through what xxxServices I can access the filter).
Can anyone tell me if I´m on the right track here? Thanks!
(*) In particular, H2365 about overridden methods not matching the case of the parent. Not so nice when you have about 5 million lines of active code with a slightly different code convention than Embarcadero's. We've been working without hints for months now, and we kinda miss 'm. :-)
Even if you could query BorlandIDEServices for IOTAToolsFilter, that interface isn't going to help you do what you're asking. That interface was introduced as part of a mechanism for adding additional build tools (compilers, etc.) to the IDE (before the IDE used MSBuild). It allowed you to write a custom "filter" to handle output from a particular build tool, but it would not let you apply a filter to one of the built-in tools (like the delphi compiler).
The reason the Supports(BorlandIDEServices, IOTAToolsFilter, OTAToolsFilter) call fails in Delphi2010 is that once MSBuild support was added to the IDE, the old way of adding build tools to the IDE was disabled, and the BorlandIDEServices interface no longer supported IOTAToolsFilter.
The declaration of IOTAToolsFilter should probably have been marked deprecated in ToolsAPI.pas (or least it should have been mentioned in the source code comment that it is no longer supported).
As far as your desire to filter a particular hint, I'm not aware of a way to do that via the ToolsAPI. It seems like a reasonable thing that can be added to IOTAMessageServices (the ability to enumerate, filter, and possibly change the messages in the IDE's Message View). I would enter a request in QualityCentral for that.
Also, please vote for QC #35774 (http://qc.embarcadero.com/wc/qcmain.aspx?d=35774), as if that were implemented, you would not need to use the ToolsAPI for this sort of thing.
According to http://docwiki.embarcadero.com/RADStudio/en/Obtaining_Tools_API_Services it should be possible to access it directly using BorlandIDEServices, eg:
var
OTAToolsFilter: IOTAToolsFilter;
begin
if Supports(BorlandIDEServices, IOTAToolsFilter, OTAToolsFilter) then
ShowMessage('supports IOTAToolsFilter')
else
ShowMessage('IOTAToolsFilter NOT supported');
end;
However this doesn't return the desired interface in Delphi 2010 (you'll get the not supported message), so there's either an error in the documentation, or an error in BorlandIDEServices not returning the correct interface.
I have a set of compiled Delphi dcu files, without source. Is there a way to determine what types are defined inside that dcu?
To find out what's in a unit named FooUnit, type the following in your editor:
unit Test;
interface
uses FooUnit;
var
x: FooUnit.
Press Ctrl+Space at the end, and the IDE will present a list of possible completion values, which should consist primarily, if not exclusively, of type names.
You could have a look at DCU32INT, a Delphi DCU decompiler. It generates an .int file that is somehow readable but not compilable, but if you only want to determine the types defined, this could be enough.
The DCU format is undocumented, last I checked. However, there is a tool I found that might give you some basic info called DCUtoPAS. It's not very well rated on the site, but it might at least extract the types for you. There is also DCU32INT, which might help as well.
Otherwise, you might just have to open the file with a hex editor and dig around for strings.