Recent questions tagged delphi

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delphi - Anonymous methods - variable capture versus value capture

Below is a SSCCE based on an example in the Anonymous Methods section of Part 1 of Chris Rolliston's excellent Delphi XE2 ... P2)); P1; P2; end; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - My program never releases the memory back. Why?

I have a MDI program. When It starts it takes 2-3MB of RAM. Then, in this program I create about 260 ... memory manager to release the memory) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to free control inside its event handler?

Does anybody know the trick, how to free control inside its event handler ? According delphi help it is not ... achieve the same effect? Thanx See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Load Jpg/Gif/Bitmap and convert to Bitmap

I have to load an image from an XML file. There is no information in the XML file about whether the image ... using Delphi 2007/2009 Thank you. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - TThreadedQueue not capable of multiple consumers?

Trying to use the TThreadedQueue (Generics.Collections) in a single producer multiple consumer scheme. (Delphi-XE) ... others to break TMonitor. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How do I make a PNG resource?

I've got a form with a large TImage on it as a background. Problem is, this is stored directly in the DFM as ... . Anyone know how that's done? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to add mouse wheel support to a component descended from TGraphicControl?

I have created a delphi component which descends from TGraphicControl. Is it possible to add support for mouse wheels? ... , but not the other. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Converting a string to TDateTime based on an arbitrary format

Is there any way in Delphi 5 to convert a string to a TDateTime where you can specify the actual format to ... the string to a TDateTime. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Redraw image from 3d perspective to 2d

I need an inverse perspective transform written in Pascal/Delphi/Lazarus. See the following image: I think I need to ... would not be ideal... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How can I allow a form to accept file dropping without handling Windows messages?

In Delphi XE can I allow my form to accept file 'drag and drop' but without having to handle bare windows messages? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to access private methods without helpers?

In Delphi 10 Seattle I could use the following code to work around overly strict visibility restrictions. How do ... to access private members? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to use ScanLine property for 24-bit bitmaps?

How to use ScanLine property for 24-bit bitmap pixel manipulation? Why should I prefer to use it rather ... frequently used Pixels property? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How to avoid issues when embedding a TForm in another TForm?

I often embed a TForm descendant into another TForm descendant like this: var Form1: TForm1; Form2: TForm2; begin ... /wc/qcmain.aspx?d=90324 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Component Creation - Joining Components Together?

I am new to component creation and was experimenting with creating some of my own custom derived components using ... properties of TImage :) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Creating a component with named sub-components?

I need to know the basics behind making a component produce and manage sub-components. I originally tried this by ... begin fName:= Value; end; See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Should the compiler hint/warn when passing object instances directly as const interface parameters?

Should the compiler hint/warn when passing a new instance of an object to a method having a const interface parameter ... ; end; end. --jeroen See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Inter-process communication

I have two applications: X and Y. X is the main application and it handles a lot of XML files. It has ... result in delays or other problems... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - How do I sort a generic list using a custom comparer?

I'm kinda a Delphi-newbie and I don't get how the Sort method of a TList of Records is called in ... function, always getting some error... See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Documentation and API Samples for drawing on Windows Aero Glass (DWM, GDI, GDI+) for all Win32 programmers

I am looking for good resources for learning to use the Win32/GDI APIs or whatever supercedes it to draw and ... MSDN article about it here. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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delphi - Interfaces and overload directive

The following code throws me the compiler error E2252 Method 'MyFunction' with identical parameters already exists ... that sufficient not to be considered identical parameters?...

asked Jan 29, 2021 in Technique[技术] by 深蓝 (71.8m points)

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