MFC界面控件位置大小控制的EasySize使用说明

第一步：讲EasySize.h头文件拷贝到工程文件夹下面

第二步：在对话框类定义下面添加"DECLARE_EASYSIZE"宏，没有分号，同消息映射类似。

第三步：添加控件布局映射，在该对话实现文件的消息映射下加上：BEGIN_EASYSIZE_MAP(对话框类名)

    EASYSIZE(控件ID,left,top,right,bottom,options);

END_EASYSIZE_MAP，该格式类似消息映射的格式

第四步：在对话框的onInitDialog里添加宏："INIT_EASYSIZE;"，该句是有分号的。

第五步：在对话框的OnSize里添加宏："UPDATE_EASYSIZE;"，该句是有分号的。

第六步：如果要限制对话框的最小尺寸，在对话框的OnSizing里添加：EASYSIZE_MINSIZE

(width,height,fwSide,pRect)；

注意：1、第二步和第三步必须对应，不然连接会报错。

2、一般Dialog没有WM_SIZING，在Class Wizard里选择Class Info标签，然后在Message Fileter下拉列表中选

择Windows，然后再点击Message Maps标签，就出现WM_SIZING消息了。

3、control是要设置的控件的ID；left、top、right、bottom分别指的是该控件左、上、右、下方的控件的ID，

也可以为以下特殊值；ES_BORDER：保持与边框距离不变；ES_KEEPSIZE：保持大小不变；options可指定为0，也

可指定为以下值：ES_HCENTER：保持宽度不变，水平位置在left和right指定的控件正中间；ES_VCENTER：保持

高度不变，垂直位置在left和right指定的控件正中间。

EasySize.h文件内容

/*===================================================*\

|                                                     |

|  EASY-SIZE Macros                                   |

|                                                     |

|  Copyright (c) 2001 - Marc Richarme                 |

|      devix@devix.cjb.net                            |

|      http://devix.cjb.net                           |

|                                                     |

|  License:                                           |

|                                                     |

|  You may use this code in any commersial or non-    |

|  commersial application, and you may redistribute   |

|  this file (and even modify it if you wish) as      |

|  long as you keep this notice untouched in any      |

|  version you redistribute.                          |

|                                                     |

|  Usage:                                             |

|                                                     |

|  - Insert 'DECLARE_EASYSIZE' somewhere in your      |

|    class declaration                                |

|  - Insert an easysize map in the beginning of your  |

|    class implementation (see documentation) and     |

|    outside of any function.                         |

|  - Insert 'INIT_EASYSIZE;' in your                  |

|    OnInitDialog handler.                            |

|  - Insert 'UPDATE_EASYSIZE' in your OnSize handler  |

|  - Optional: Insert 'EASYSIZE_MINSIZE(mx,my);' in   |

|    your OnSizing handler if you want to specify     |

|    a minimum size for your dialog                   |

|                                                     |

|        Check http://devix.cjb.net for the           |

|              docs and new versions                  |

|                                                     |

\*===================================================*/

#ifndef __EASYSIZE_H_

#define __EASYSIZE_H_

#define ES_BORDER 0xffffffff

#define ES_KEEPSIZE 0xfffffffe

#define ES_HCENTER 0x00000001

#define ES_VCENTER 0x00000002

#define DECLARE_EASYSIZE \

void __ES__RepositionControls(BOOL bInit);\

void __ES__CalcBottomRight(CWnd *pThis, BOOL bBottom, int &bottomright, int &topleft, UINT id, UINT br, int es_br, CRect &rect, int clientbottomright);

#define INIT_EASYSIZE __ES__RepositionControls(TRUE); __ES__RepositionControls(FALSE)

#define UPDATE_EASYSIZE if(GetWindow(GW_CHILD)!=NULL) __ES__RepositionControls(FALSE)

#define EASYSIZE_MINSIZE(mx,my,s,r) if(r->right-r->left < mx) { if((s == WMSZ_BOTTOMLEFT)||(s == WMSZ_LEFT)||(s == WMSZ_TOPLEFT)) r->left = r->right-mx; else r->right = r->left+mx; } if(r->bottom-r->top < my) { if((s == WMSZ_TOP)||(s == WMSZ_TOPLEFT)||(s ==
WMSZ_TOPRIGHT)) r->top = r->bottom-my; else r->bottom = r->top+my; }

#define BEGIN_EASYSIZE_MAP(class) \

void class::__ES__CalcBottomRight(CWnd *pThis, BOOL bBottom, int &bottomright, int &topleft, UINT id, UINT br, int es_br, CRect &rect, int clientbottomright) {\

if(br==ES_BORDER) bottomright = clientbottomright-es_br;\

else if(br==ES_KEEPSIZE) bottomright = topleft+es_br;\

else { CRect rect2;\

pThis->GetDlgItem(br)->GetWindowRect(rect2); pThis->ScreenToClient(rect2);\

bottomright = (bBottom?rect2.top:rect2.left) - es_br;}}\

void class::__ES__RepositionControls(BOOL bInit) { CRect rect,rect2,client; GetClientRect(client);

#define END_EASYSIZE_MAP Invalidate(); UpdateWindow(); }

#define EASYSIZE(id,l,t,r,b,o) \

static int id##_es_l, id##_es_t, id##_es_r, id##_es_b;\

if(bInit) {\

GetDlgItem(id)->GetWindowRect(rect); ScreenToClient(rect);\

if(o & ES_HCENTER) id##_es_l = rect.Width()/2; else {\

if(l==ES_BORDER) id##_es_l = rect.left; else if(l==ES_KEEPSIZE) id##_es_l = rect.Width(); else {\

    GetDlgItem(l)->GetWindowRect(rect2); ScreenToClient(rect2);\

    id##_es_l = rect.left-rect2.right;}}\

if(o & ES_VCENTER) id##_es_t = rect.Height()/2; else {\

if(t==ES_BORDER) id##_es_t = rect.top; else if(t==ES_KEEPSIZE) id##_es_t = rect.Height(); else {\

    GetDlgItem(t)->GetWindowRect(rect2); ScreenToClient(rect2);\

    id##_es_t = rect.top-rect2.bottom;}}\

if(o & ES_HCENTER) id##_es_r = rect.Width(); else { if(r==ES_BORDER) id##_es_r = client.right-rect.right; else if(r==ES_KEEPSIZE) id##_es_r = rect.Width(); else {\

    GetDlgItem(r)->GetWindowRect(rect2); ScreenToClient(rect2);\

    id##_es_r = rect2.left-rect.right;}}\

if(o & ES_VCENTER) id##_es_b = rect.Height(); else  { if(b==ES_BORDER) id##_es_b = client.bottom-rect.bottom; else if(b==ES_KEEPSIZE) id##_es_b = rect.Height(); else {\

    GetDlgItem(b)->GetWindowRect(rect2); ScreenToClient(rect2);\

    id##_es_b = rect2.top-rect.bottom;}}\

} else {\

int left,top,right,bottom; BOOL bR = FALSE,bB = FALSE;\

if(o & ES_HCENTER) { int _a,_b;\

if(l==ES_BORDER) _a = client.left; else { GetDlgItem(l)->GetWindowRect(rect2); ScreenToClient(rect2); _a = rect2.right; }\

if(r==ES_BORDER) _b = client.right; else { GetDlgItem(r)->GetWindowRect(rect2); ScreenToClient(rect2); _b = rect2.left; }\

left = _a+((_b-_a)/2-id##_es_l); right = left + id##_es_r;} else {\

if(l==ES_BORDER) left = id##_es_l;\

else if(l==ES_KEEPSIZE) { __ES__CalcBottomRight(this,FALSE,right,left,id,r,id##_es_r,rect,client.right); left = right-id##_es_l;\

} else { GetDlgItem(l)->GetWindowRect(rect2); ScreenToClient(rect2); left = rect2.right + id##_es_l; }\

if(l != ES_KEEPSIZE) __ES__CalcBottomRight(this,FALSE,right,left,id,r,id##_es_r,rect,client.right);}\

if(o & ES_VCENTER) { int _a,_b;\

if(t==ES_BORDER) _a = client.top; else { GetDlgItem(t)->GetWindowRect(rect2); ScreenToClient(rect2); _a = rect2.bottom; }\

if(b==ES_BORDER) _b = client.bottom; else { GetDlgItem(b)->GetWindowRect(rect2); ScreenToClient(rect2); _b = rect2.top; }\

top = _a+((_b-_a)/2-id##_es_t); bottom = top + id##_es_b;} else {\

if(t==ES_BORDER) top = id##_es_t;\

else if(t==ES_KEEPSIZE) { __ES__CalcBottomRight(this,TRUE,bottom,top,id,b,id##_es_b,rect,client.bottom); top = bottom-id##_es_t;\

} else { GetDlgItem(t)->GetWindowRect(rect2); ScreenToClient(rect2); top = rect2.bottom + id##_es_t; }\

if(t != ES_KEEPSIZE) __ES__CalcBottomRight(this,TRUE,bottom,top,id,b,id##_es_b,rect,client.bottom);}\

GetDlgItem(id)->MoveWindow(left,top,right-left,bottom-top,FALSE);\

}

#endif //__EASYSIZE_H_