Delphi7中如何安装Tntcontrols

Question

I am new to Delphi, I need TntContols package in my project, Download TntContols in https://github.com/pitfiend/TntControls , the install TntUnicode-master\\Delphi\\d7TntUnicodeVcl_D70.dpk , then I drag a TntButton into the form, and Run my application, but error throw:

[Fatal Error] Unit1.pas(7): File not found: 'TntStdCtrls.dcu'

code below:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, TntStdCtrls;

type
  TForm1 = class(TForm)
    btn1: TTntButton;
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

end.

Answer 1

By default, the BPL and DCU files that come with D7 are installed in the .LIB and .BIN folders, respectively, below the main Delphi folder, which I'll refer to as \\D7.

It's best not to install other components to those folders. The reason is that eventually, as you install extra 3rd party libraries, you are likely to run into a compilation error "Unit Y was compiled with a different version of unit Y" which may require you to re-install Delphi if files in the BIN and LIB folders are involved. Actually, this problem usually arises after you've compiled a project which is configured so that it needlessly has access to the library's .PAS files (because the IDE does not need access to the libary's .PAS during compilation of a project which uses the library, as long as it can find the library's .DCU files).

Many 3rd party libraries include (at least) two .DPK files, one of which is a so-called runtime package and the other is a design-time package. The design-time package is the one you install in the IDE to install the library's components and the run-time package contains routines which those in the design-time package depend on. Unless a project which uses the libary is compiled to use runtime packages, the runtime package is not used in the process of compiling the project (but the counterpart .DCU files will be, which is why the IDE needs to be configured to find them).

What I've always done for 3rd party D7 libraries which don't have their own installer is as follows:

1. One-time only: Create a folder \\D7\\LIB2. Add it to your OS Path.

2. For each .DPK file in the library you wish to install:

   a. Open the .DPK file in the IDE and edit its BPL and DCU output folders to \\D7\\LIB2. Do this by clicking the Options button in the Package editor and in the Project Options pop-up, on the Directories/Conditionals tab, set the Output Directory, Units Output Directory and DCP Output Directory all to \\D7\\LIB2

   b.Compile the package by clicking the Compile button, then install it in the IDE by clicking the Install button if it's enabled.

   c. Close the Package (.DPK) editor.

3. Open your project which is to use the library and edit its search path to include \\D7\\LIB2 but NOT the path to the library's .PAS files.

4. Compile your project.

Notes:

Notice that the abouve does NOT include adding the path to the source (.PAS files) of the library to your project. Doing so is unnecessary if you follow the above steps and only likely to lead (eventually) to the occurrence of the "Unit Y was compiled ..." error I mentioned.

The above method also works with recent Delphi versions, though involves more clicking around to do the necessary since the stand-alone .DPK editor was removed from the IDE.