Delphi 2010的QT绑定

Question

Why isn't anyone developing QT bindings for Delphi.

In the past we had QT 2.x integrated as CLX in Delphi.

I really hate the CLX wrappers since they were buggy and hard to extend.

But why isn't anyone making an API list of external DLL calls to use (the same way JCL wraps the Windows API).

Is it so hard to code such API function mapping? Or maybe the QT classes cannot be exposed to non-C callers?

Any hint in this direction is welcome.

Answer 1

qtintf.dll似乎是你正在寻找的平面API DLL和Qt.pas相应的导入单元。

Answer 2

I recommend you wait for VCL+, that is the Qt binding coming with the next version of Delphi.

The problem is that Qt is heavily macro-based and C++ based. So the Qt "flat API" is quite verbose and big. I wonder how EMB will create its own VCL+ binding, but I'll definitively wait for their implementation for using Qt on any Delphi project.

If you can't wait, and really want cross-platform User Interface (with Mac O$ support), I recommend using http://www.twinforms.com/products/wxformsdelphi and not Qt. It relies on a separate DLL, but it's easier to develop, and well maintained/documented.

Answer 3

I managed to port the qt4.pas from http://users.telenet.be/Jan.Van.hijfte/qtforfpc/fpcqt4.html .

It is originally written for Lazarus but I managed to port it to Delphi.

One must do the following

1. declare

   type PUInt = ^Integer; PTRUINT = PUInt; PtrInt = ^Integer; PPtrInt = ^PtrInt;

2. comment out all calls with "qword" paramters since quad-words are not supported in Delphi

3. comment out "{$mode objfpc}{$H+}" since this is Lazarus stuff
4. replace all "cdecl; external" with "cdecl; overload; external"

Than the demos can be compiled and run just fine with Delphi.

Answer 4

从我所听到的，显然Delphi XE2的跨平台组件库（明年即将推出的版本）将基于QT，有点像CLX，它应该实际上正常工作。