面向对象的c ++ win32？ [英] Object oriented c++ win32?

问题描述

我想创建自己的类来处理创建窗口和窗口过程，但我注意到窗口过程必须是静态的！我现在想知道是否可能使窗口过程面向对象？我已经阅读了一些关于面向对象的窗口的教程，但他们总是使过程静态。 ：/

I want to create my own class to handle creating windows and the window procedure but I have noticed that the window procedure has to be static! I'm now wondering whether its possible to make the window procedure object oriented? I have read some tutorials on object oriented windows, but they always make the procedure static -.- whats the use in that? :/

任何有关如何解决这个问题的链接或信息都将受到赞赏，

Any links or info on how to get around this problem would be appreciated,

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推荐答案

通过将静态WndProc委托给成员，可以解决这一问题：

You can get around that by making the static WndProc delegate everything to the members:

// Forward declarations
class MyWindowClass;
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

std::map<HWND, MyWindowClass *> windowMap;

// Your class
class MyWindowClass  {
private:
  HWND m_handle;

  // The member WndProc
  LRESULT MyWndProc(UINT message, WPARAM wParam, LPARAM lParam) { /* ... */ }

public:
  MyWindowClass()
  {
    /* TODO: Create the window here and assign its handle to m_handle */
    /* Pass &WndProc as the pointer to the Window procedure */

    // Register the window
    windowMap[m_handle] = this;
  }
};

// The delegating WndProc
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
  std::map<HWND, MyWindowClass *>::iterator it = windowMap.find(hWnd);
  if (it != windowMap.end())
    return it->second->MyWndProc(message, wParam, lParam);
  return 0;
}

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