This is a continuation of the project I was working on here: http://stackoverflow.com/questions/692173/circular-reference-issue-with-classes-which-use-each-other The advice received there fixed the ciruclar reference problem (again, thanks for the help). Now I'm wrestling w/something else: TcmDataPanel.FObservingDataPanels always ends...
I have a form that I use to show some information for some seconds. Is it ok for the form to free itself? Can I start a timer in the constructor, and then call self.free in the timer-event? Or will this potentially lead to trouble? ...
How best could I save this component and all internal variables? Examples of code would be appreciated. TSmall = record fName: string[30]; fAge: integer; fID_Number: string[30]; end; TRec = record ArraySmall: array[1..10] of TSmall; end; TBigComponent = class(TComponent) private fSmallArr: TRe...
I would like to draw an icon/bmp into a subitem of a TListView using delphi. But I don't know how to accomplish that. It works fine for the first item on the list, but having problems with the subitems. ...
I written a program with Delphi 7 which searches *.srt files on a hard drive. This program lists the path and name of these files in a memo. Now I need convert these files from ANSI to UTF-8, but I haven't succeeded. Please help me... ...
Hi everyone Is there a way to use reports in turbo Delphi, I searched a lot for Report components, but I couldn't find any ! any hint is highly appreciated. ...
I'm trying to insert a record into a table in a 3-tier database setup, and the middle-tier server generates the error message above as an OLE exception when it tries to add the first parameter to the query. I've Googled this error, and I find the same result consistently: it comes from having a colon in a string somewhere in your query,...
I'm trying to send an email with embedded images through a delphi application using Indy, but somehow it isn't working. I compared the contents of the email I sent with one sent from gmail, and everything seens fine, but I might be missing some little detail. Gmail shows the attached image of my email as a normal attachment, but it is ...
I already read up about passing by reference and so procedure test(var x:integer); begin x:=x+5; end; so the above code updates 5 by reference. I assumed if I was updating an array by reference I could declare var X: array of blah... having some bound bugs and just wanted to know if I should be using the type of data for the pointer...
I'm just trying to get the hang of separate units to make my code more encapsulated. I'm trying to get the public/private declarations of my methods sorted out, so I can call them from other units that use testunit. In this example I want to make hellofromotherunit public, but stickletters private. unit testunit; interface uses ...
I have a Delphi application which hits a database (usually MySql) every 60 seconds through a TTimer. The application is more or less an unattended bulletin board. If the network drops the application needs to continue running and connect back to the database when the connection is back. Often it might be over broadband, so chances are...
Var A : Array [1..4] of Integer; B : Array [1..4] of Integer; Begin A := B; Won't work as loren-pechtel said here the problem is A and B for me are in different units. So, is there a way to define a type definition from a existing one in another class? ...
One of the requirements for the twitter client we are developing for the community is a spellcheck component. What are some of the spellcheck components/systems you have used in applications and what was your experience using it? ...
How to retrieve last user selected printer when printing from a preview window in Fast Report (Basic Edition ver. 4.7.1)? I tried frxReport.PrintOptions.Printer in OnAfterPrintReport event but it only returns the system default printer. After the user prints the report, the program prints a few Word documents and I need to know whic...
Hello, In this question my objective is to retrieve a database table content. populate dbGrid, close connection. If I use the following code, dbgrid or combobox are going to loose the information. adoQry := TADOQuery.Create(self); adoQry.Connection := adoConn; adoQry.SQL.Add(SqlStr); adoQry.Prepared := true; try adoQry.Active := T...
I want to know (for debugging and logging) the size of an object in bytes, but not like Sizeof (Object) but like a 'deep sizeof'. For example if the object contains a hash map or a list, the real size needed by that hash map or list should be added to the result. Is there any way to do this without having to add a property Size : Lon...
Using the DelphiTwain files from http://delphitwain.sourceforge.net/ and am getting some weird behavior. After each scan a little more memory is being held onto. After an hour or so of repetitive scans, the image scanned is zoomed in approxamately 10 times, and just the upper-left square inch is stored. Has anyone had similar issu...
In one part of the application I'm working on, there is a form control that does validation on reception of the CMExit message, which is exactly how the Delphi documentation says to do it (this code sample is from the Delphi Help files): procedure TDBCalendar.CMExit(var Message: TWMNoParams); begin try FDataLink.UpdateRecord; ...
Do "What's wrong with using inline functions" and "Can a recursive function be inline" apply to Delphi inline functions? Furthermore, does anyone know how recursive inline functions are handled in Delphi? ...
Running Delphi 2007 (and probably other versions as well, I'm guessing), if I right-click on a project in the Project Manager (either EXE of BPL in this case), there is a "Clean" command above Compile and Build. What exactly does it do? ...