Recent questions tagged delphi

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delphi - How to access a property of the component that the Sender parameter is referencing (the component that fired the event)

I am new to delphi and pascal and was wondering if there was a way to get/access a property of the component that the Sender is referencing within ... something like or something similar to this be done? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Turbopower Lockbox3 - Can I control initialization vector and padding for AES-256 encryption?

In the process of moving from Delphi2007 to XE2, we are thinking about switching encryption libraries from DCPCrypt to Turbopower Lockbox 3. a) In ... Plaintext = 'a_decent_text' (ansistring) Thanks Jan See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - What would be an ideal way to list existing objects to read and alter their properties?

I'm trying to develop an application in Delphi XE2 that will be able to read and alter object properties between different applications. Currently, our ... VB application, redacted parts for security): See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Can I programmatically set the position of ComboBox dropdown list?

Ordinary Windows ComboBox (csDropDown or csDropDownList style) will open its dropdown list right below or, if no space left below, above the combo. Can I ... of this list (at least by Y coordinate)? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to show the sort arrow on a TListView column?

Windows Explorer has an arrow indicating which column a list view (in report view style) is sorted by and in which direction (ASC vs. DESC). Is it ... a sort indication arrow on a TListView in Delphi? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Passing the variable to another Form

I got Form1 with some variables and I want to pass it to another Form3 where I'll use it. So I have two questions. How can I get access to the ... begin Label4.Caption:= intToStr(idList.Count); end; end. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - VirtualTreeView with UseExplorerThemes

I just discovered that using the Option toUseExplorerTheme allows to produce a nice selection rectangle for a VirtualStringTree. However, if the Option toGridExtensions ... program and click on any cell. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to read from an external console application?

I have a console application that I didn't write. Is there some easy way to read from it? I need to have the input still on the console window, but ... console or not, so long as the input still works. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to draw on a TPanel

I need to draw on a TPanel, ideally directly so I don't have another component on top of it getting in the way of mousevent-event trapping (I want to draw ... " on it). How should I go about doing this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How can I return a PChar from a DLL function to a VB6 application without risking crashes or memory leaks?

I have to create a DLL which is used by a VB6 application. This DLL has to provide several functions, some of them must return strings. This is the ... : I'm asking about Delphi 2005 (PChar = PAnsiChar) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Opening a Firebird database file on a network share

I thought converting a mapped drive letter to a UNC path would be enough to be able to open a .GDB file, but alas: function ConvertToUNCPath(AMappedDrive: string ... path (some I code I found on the web). See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Why UrlDownloadToFile::OnProgress always return ulProgress and ulProgressMax with the same value

This is my delphi code: TDownloadCallback = class(TInterfacedObject, IBindStatusCallback) private fOwner: TDownload; fUrl: string; public constructor Create( ... header) using the UrlDownloadToFile ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to set shortcut to a line of code in Eclipse IDE editor

I'm after a feature in eclipse that allows me to allocate a shortcut to a line (say line number 55) then go somewhere else in the same file and ... there which adds this feature to eclipse? Regards, Ali See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Storing interface pointer inside tree view nodes

I'm attempting to store interface pointers in a tree view under TTreeNode.Data properties. While I am able to store an interface pointer (Node.Data := ... end; What's the appropriate way to do this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to 'parent' a form? (Controls won't accept focus)

I have a child form 'frmTest' and a main form 'TfrmMain'. I set the main form as parent for frmTest like this: unit Main; INTERFACE USES System.SysUtils ... can be focused with Tab. What am I doing wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Opening URL within ios application

I need to open a webpage with safari in my iOS application. With XE2 there was iphoneall unit, which exposed UIApplication. XE4 doesn't use FPC anymore, ... to take that road just to display a webpage. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Make 2 forms able to overlap each other?

I would like to have a seperate form that shows "along" with my main form, so it does not overlap the main form. Here's an example: Notice how the ... can't figure out how to do that in Delphi. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - I need help on how to implement class that can be shown in object Inspector

i have ... TDispPitch = class private iLineSize: Integer; iLineColor: TColor; bDisplayAccent: Boolean; bVisible: Boolean; published property LineSize : ... its properties. like LineSize, LineColor etc. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Lockbox 3 load public key not possible - stream reading error

Well i generated a keypair with openssl openssl genrsa -des3 -out _private.pem 1024 openssl rsa -pubout -in _private.pem -out public.pem Public ---- ... XE7 and the latest release of Lockbox 3 from Github See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Transfer Authentication from Webbrowser to Indy CookieManager

How do you put the cookie from the Webbrowser to an Indy CookieManager for Http Request. I get the cookies after i login in to a website like this. ... :=cookiedata; FreeMem(Cookiedata); end; end; end; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Tile/Center image in the forms background

Is there a way to place an image in the form background and be able to tile it or center it ? Also I need to place other components on top of ... but I cannot place anything on top of the image. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to get the default system icon for a drive, a device or a file

I am creating a remote file manager. The server side application gets the list of drivers, directories and files in the computer, saves it as stream and ... impossible, just let me know please... Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Drag/Drop inside an Application AND to another Application

I have a ListView containing file names. These file names need to be draggable to a TreeView, which is a drag/drop inside the application and works ... standard drag drop. Thanks for any help! Holger See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - ssl v3 poodle and move to tls with indy

As you know the new poodle is in town, Witch barks got Twitter, Cloudflare to drop support to SSL3. The Indy(TidHttp) 10.6.0.0 ... Free; parameters.Free; IdSSLIOHandlerSocketOpenSSL1.Free; end; end; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Why doesn't my program's memory usage return to normal after I free memory?

consider the next sample application program TestMemory; {$APPTYPE CONSOLE} uses PsAPI, Windows, SysUtils; function GetUsedMemoryFastMem: cardinal; var st: ... different in the Before and After: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How can I avoid refresh with TWebBrowser

I have a TWebBrowser component that show a Google maps page. The problem is that when user press F5 the page refresh and page reloads. This cause javascript ... is not even called. Is there another way ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to display BLOB Image from database in the TAdvStringGrid with the help of DataSet

I have been making an application at Delphi XE3. I am trying to display values from database to the TAdvStringGrid component placed on the form. I am ... with the MemoryStream. How to rectify this error? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How do you design FIFO queue with variable data size?

I'm just working on the FIFO queue (the simple one, just what's pushed first, pops at first) with the variable data size but I'm not sure with the way ... to about 1MB (in case of stream) ? Thanks a lot See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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