MFC 设计界面程序总是不够智能，没有这样，没有那样。

　　今天为了加强mfc功能，设计了一个自动布局的类，使用非常简单。

原理：

　　每个控件都有一个矩形区域，矩形区域就是控件在对话框中的显示位置和大小，
通过矩形的四个顶点，控制控件的布局，
　　在mfc中OnSize()函数在对话框大小变化时被调用，所有每次对话框大小变化时，
我们重新计算对控件的矩形坐标，然后移动到新的坐标，实现控件自动布局。

效果：

1、原始界面：

2、改变对话框大小后界面：

接口：

 /**

 *   @brief  Init the rect and calc the ratio

 *

 *   @param  window_width    the width of dialog

 *   @param  window_height   the height of dialog

 *   @return void

 */

 void InitLayout(int window_width, int window_height);

 /**

 *   @brief  Set the control change mode

 *

 *   @param  ctrl_id             the id of control

 *   @param  left_change_mode    the mode how to change the left coord

 *   @param  right_change_mode   the mode how to change the right coord

 *   @param  top_change_mode     the mode how to change the top coord

 *   @param  bottom_change_mode  the mode how to change the bottom coord

 *   @return void

 */

 void SetControlAutoChangeMode(int ctrl_id, int left_change_mode,

     int right_change_mode, int top_change_mode, int bottom_change_mode);

 /**

 *   @brief  Set dialog handle to this class to call some function

 *

 *   @param  wnd_dialog    the handle of dialog which contains the control

 *   @return void

 */

 void SetDialogHandle(CWnd *wnd_dialog);

 /**

 *   @brief  Enable the layout function or not

 *

 *   @param  is_auto_layout    indicate Enable layout or not

 *   @return void

 */

 void SetAutoLayoutEnable(bool is_auto_layout);

 /**

 *   @brief  Update the original rect of control.

 *           It will be use when you change the control original size

 *

 *   @param  control_item    the handle of control

 *   @param  rect            new rect of control

 *   @return void

 */

 void UpateControlOriginalRect(CWnd* control_item, CRect rect);

用法：

  1. Copy ControlAutoLayout.h, ControlAutoLayout.cpp, Layout.h too you project
  2. Include ControlAutoLayout.h in the dialog class file
  3. Add a member variable of ControlAutoLayout in dialog class,such as: ControlAutoLayout control_auto_layout_;

  4. On the OnInitDialog() function of dialog class，
    use "control_auto_layout_.SetDialogHandle(this);" to
    set the dialog handle to ControlAutoLayout

  5. On the OnSize() function of dialog class，
    use "control_auto_layout_.InitLayout(int window_width, int window_height);"
    to init ControlAutoLayout and then, set each control's change mode:
    control_auto_layout_.SetControlAutoChangeMode(int ctrl_id, int left_change_mode,
    int right_change_mode, int top_change_mode, int bottom_change_mode);

源码：

　　Layout.h

 // Layout.h

 // 控件

 // LeftChangeMode   : 0:与窗口客户区左边的距离不变; 1:按比例变化; 2:保持控件宽度不变;

 // RightChangeMode  : 0:与窗口客户区右边的距离不变; 1:按比例变化; 2:保持控件宽度不变;

 // TopChangeMode    : 0:与窗口客户区上边的距离不变; 1:按比例变化; 2:保持控件高度不变;

 // BottomChangeMode : 0:与窗口客户区下边的距离不变; 1:按比例变化; 2:保持控件高度不变;  

 // LeftChangeMode取值宏定义

 #define LEFT_CHANGE_MODE_LEFTPADDING            0

 #define LEFT_CHANGE_MODE_RATIO                  1

 #define LEFT_CHANGE_MODE_FIXED_WIDTH            2  

 // RightChangeMode取值宏定义

 #define RIGHT_CHANGE_MODE_RIGHTPADDING          0

 #define RIGHT_CHANGE_MODE_RATIO                 1

 #define RIGHT_CHANGE_MODE_FIXED_WIDTH           2  

 // TopChangeMode取值宏定义

 #define TOP_CHANGE_MODE_TOPPADDING              0

 #define TOP_CHANGE_MODE_RATIO                   1

 #define TOP_CHANGE_MODE_FIXED_HEIGHT            2  

 // BottomChangeMode取值宏定义

 #define BOTTOM_CHANGE_MODE_BOTTOMPADDING        0

 #define BOTTOM_CHANGE_MODE_RATIO                1

 #define BOTTOM_CHANGE_MODE_FIXED_HEIGHT         2

 //////////////////////////////////////////////////////////////////////////

 //horizontal change mode

 //////////////////////////////////////////////////////////////////////////

 #define LEFT_PADDING_RIGHT_PADDING \

     ((LEFT_CHANGE_MODE_LEFTPADDING << ) + RIGHT_CHANGE_MODE_RIGHTPADDING)

 #define LEFT_PADDING_RIGHT_RATIO \

     ((LEFT_CHANGE_MODE_LEFTPADDING << ) + RIGHT_CHANGE_MODE_RATIO)

 #define LEFT_PADDING_RIGHT_FIXED_WIDTH \

     ((LEFT_CHANGE_MODE_LEFTPADDING << ) + RIGHT_CHANGE_MODE_FIXED_WIDTH)

 #define LEFT_RATIO_RIGHT_PADDING \

     ((LEFT_CHANGE_MODE_RATIO << ) + RIGHT_CHANGE_MODE_RIGHTPADDING)

 #define LEFT_RATIO_RIGHT_RATIO \

     ((LEFT_CHANGE_MODE_RATIO << ) + RIGHT_CHANGE_MODE_RATIO)

 #define LEFT_RATIO_RIGHT_FIXED_WIDTH \

     ((LEFT_CHANGE_MODE_RATIO << ) + RIGHT_CHANGE_MODE_FIXED_WIDTH)

 #define LEFT_FIXED_WIDTH_RIGHT_PADDING \

     ((LEFT_CHANGE_MODE_FIXED_WIDTH << ) + RIGHT_CHANGE_MODE_RIGHTPADDING)

 #define LEFT_FIXED_WIDTH_RIGHT_RATIO \

     ((LEFT_CHANGE_MODE_FIXED_WIDTH << ) + RIGHT_CHANGE_MODE_RATIO)

 #define LEFT_FIXED_WIDTH_RIGHT_FIXED_WIDTH \

     ((LEFT_CHANGE_MODE_FIXED_WIDTH << ) + RIGHT_CHANGE_MODE_FIXED_WIDTH)

 //////////////////////////////////////////////////////////////////////////

 //vertical change mode

 //////////////////////////////////////////////////////////////////////////

 #define TOP_PADDING_BOTTOM_PADDING \

     ((TOP_CHANGE_MODE_TOPPADDING << ) + BOTTOM_CHANGE_MODE_BOTTOMPADDING)

 #define TOP_PADDING_BOTTOM_RATIO \

     ((TOP_CHANGE_MODE_TOPPADDING << ) + BOTTOM_CHANGE_MODE_RATIO)

 #define TOP_PADDING_BOTTOM_FIXED_HEIGHT \

     ((TOP_CHANGE_MODE_TOPPADDING << ) + BOTTOM_CHANGE_MODE_FIXED_HEIGHT)

 #define TOP_RATIO_BOTTOM_PADDING \

     ((TOP_CHANGE_MODE_RATIO << ) + BOTTOM_CHANGE_MODE_BOTTOMPADDING)

 #define TOP_RATIO_BOTTOM_RATIO \

     ((TOP_CHANGE_MODE_RATIO << ) + BOTTOM_CHANGE_MODE_RATIO)

 #define TOP_RATIO_BOTTOM_FIXED_HEIGHT \

     ((TOP_CHANGE_MODE_RATIO << ) + BOTTOM_CHANGE_MODE_FIXED_HEIGHT)

 #define TOP_FIXED_HEIGHT_BOTTOM_PADDING \

     ((TOP_CHANGE_MODE_FIXED_HEIGHT << ) + BOTTOM_CHANGE_MODE_BOTTOMPADDING)

 #define TOP_FIXED_HEIGHT_BOTTOM_RATIO \

     ((TOP_CHANGE_MODE_FIXED_HEIGHT << ) + BOTTOM_CHANGE_MODE_RATIO)

 #define TOP_FIXED_HEIGHT_BOTTOM_FIXED_HEIGHT \

     ((TOP_CHANGE_MODE_FIXED_HEIGHT << ) + BOTTOM_CHANGE_MODE_FIXED_HEIGHT)

 const double kdouble_precision = 1e-;

 const int kcontrol_width_min = ;

 const int kcontrol_height_min = ;

　　ControlAutoLayout.h

 /**

  *  @file    ControlAutoLayout.h

  *  @author  Yongsheng Huang

  *  @date    8/9/2016

  *  @version 0.0.1

  *

  *  @brief Layout control automatically in MFC dialog

  *

  *  @section DESCRIPTION

  *

  *  @how to

  *

  *  1、Copy ControlAutoLayout.h, ControlAutoLayout.cpp, Layout.h too you project

  *  2、Include ControlAutoLayout.h in the dialog class file

  *  3、Add a member variable of ControlAutoLayout in dialog class,

  *      such as: ControlAutoLayout control_auto_layout_;

  *  4、On the OnInitDialog() function of dialog class，

  *      use "control_auto_layout_.SetDialogHandle(this);"  to

  *      set the dialog handle to ControlAutoLayout

  *  5、On the OnSize() function of dialog class，

  *      use "control_auto_layout_.InitLayout(int window_width, int window_height);"

  *      to init ControlAutoLayout and then, set each control's change mode:

  *      control_auto_layout_.SetControlAutoChangeMode(int ctrl_id, int left_change_mode,

  *      int right_change_mode, int top_change_mode, int bottom_change_mode);

  */

 #pragma once

 #include <cmath>

 #include <map>

 #include "Layout.h"

 class ControlAutoLayout

 {

 public:

     ControlAutoLayout(void);

     ~ControlAutoLayout(void);

 public:

     /**

     *   @brief  Init the rect and calc the ratio

     *

     *   @param  window_width    the width of dialog

     *   @param  window_height   the height of dialog

     *   @return void

     */

     void InitLayout(int window_width, int window_height);

     /**

     *   @brief  Set the control change mode

     *

     *   @param  ctrl_id             the id of control

     *   @param  left_change_mode    the mode how to change the left coord

     *   @param  right_change_mode   the mode how to change the right coord

     *   @param  top_change_mode     the mode how to change the top coord

     *   @param  bottom_change_mode  the mode how to change the bottom coord

     *   @return void

     */

     void SetControlAutoChangeMode(int ctrl_id, int left_change_mode,

         int right_change_mode, int top_change_mode, int bottom_change_mode);

     /**

     *   @brief  Set dialog handle to this class to call some function

     *

     *   @param  wnd_dialog    the handle of dialog which contains the control

     *   @return void

     */

     void SetDialogHandle(CWnd *wnd_dialog);

     /**

     *   @brief  Enable the layout function or not

     *

     *   @param  is_auto_layout    indicate Enable layout or not

     *   @return void

     */

     void SetAutoLayoutEnable(bool is_auto_layout);

     /**

     *   @brief  Update the original rect of control.

     *           It will be use when you change the control original size

     *

     *   @param  control_item    the handle of control

     *   @param  rect            new rect of control

     *   @return void

     */

     void UpateControlOriginalRect(CWnd* control_item, CRect rect);

 private:

     void SetClientWindowRectOriginal(int window_width, int window_height);

     void SetClientWindowRectNow(int window_width, int window_height);

     void CalcHorizontalRatio();

     void CalcVerticalRatio();

     //

     void CalcHorizontalCoord(int left_change_mode, int right_change_mode,

         int &left_coord, int &right_coord);

     void CalcVerticalCoord(int top_change_mode, int bottom_change_mode,

         int &top_coord, int &bottom_coord);

     //////////////////////////////////////////////////////////////////////////

     void CalcLeftPadRightPad(int &left_coord, int &right_coord);

     void CalcLeftPadRightRatio(int &left_coord, int &right_coord);

     void CalcLeftRatioRightPad(int &left_coord, int &right_coord);

     void CalcLeftRatioRightRatio(int &left_coord, int &right_coord);

     void CalcLeftRatioRightFixedWidth(int &left_coord, int &right_coord);

     void CalcLeftFixedWidthRightPad(int &left_coord, int &right_coord);

     void CalcLeftFixedWidthRightRatio(int &left_coord, int &right_coord);

     //////////////////////////////////////////////////////////////////////////

     void CalcTopPadBottomPad(int &top_coord, int &bottom_coord);

     void CalcTopPadBottomRatio(int &top_coord, int &bottom_coord);

     void CalcTopRatioBottomPad(int &top_coord, int &bottom_coord);

     void CalcTopRatioBottomRatio(int &top_coord, int &bottom_coord);

     void CalcTopRatioBottomFixedHeight(int &top_coord, int &bottom_coord);

     void CalcTopFixedHeightBottomPad(int &top_coord, int &bottom_coord);

     void CalcTopFixedHeightBottomRatio(int &top_coord, int &bottom_coord);

     //////////////////////////////////////////////////////////////////////////

     void InitControlRectInMap(CWnd* control_item);

     CRect GetControlRect(CWnd* control_item);

     int GetHorizontalChangeMode(int left_change_mode, int right_change_mode);

     int GetVerticalChangeMode(int top_change_mode, int bottom_change_mode);

     void GetRectCoord(CRect rect, int &left_coord, int &right_coord,

         int &top_coord, int &bottom_coord);

     void SetRectByCoord(CRect &rect, int left_coord, int right_coord,

         int top_coord, int bottom_coord);

     bool IsExistControlRect(CWnd* control_item);

     bool IsEqual(double x, double y);

 private:

     CWnd *wnd_dialog_;

     bool is_auto_layout_;

     CRect rect_client_window_original_;

     CRect rect_client_window_now_;

     double horizontal_ratio_;

     double vertical_ratio_;

     std::map<CWnd*,CRect> map_control_original_rect_;

 };

ControlAutoLayout.cpp

 #include "stdafx.h"

 #include "ControlAutoLayout.h"

 ControlAutoLayout::ControlAutoLayout(void)

 {

     wnd_dialog_ = NULL;

     is_auto_layout_ = true;

     rect_client_window_original_ = CRect(,,,);

     rect_client_window_now_ = CRect(,,,);

     horizontal_ratio_ = 0.0;

     vertical_ratio_ = 0.0;

     map_control_original_rect_.clear();

 }

 ControlAutoLayout::~ControlAutoLayout(void)

 {

 }

 void ControlAutoLayout::SetControlAutoChangeMode(int ctrl_id, int left_change_mode,

         int right_change_mode, int top_change_mode, int bottom_change_mode)

 {

     if (!is_auto_layout_)

     {

         return;

     }

     if (!wnd_dialog_)

     {

         return;

     }

     CWnd* control_item = wnd_dialog_->GetDlgItem(ctrl_id);

     if (!control_item)

     {

         return;

     }

     int left_coord;

     int right_coord;

     int top_coord;

     int bottom_coord;

     InitControlRectInMap(control_item);

     CRect control_item_rect = GetControlRect(control_item);

     GetRectCoord(control_item_rect,

         left_coord, right_coord, top_coord, bottom_coord);

     CalcHorizontalCoord(left_change_mode, right_change_mode,

         left_coord, right_coord);

     CalcVerticalCoord(top_change_mode, bottom_change_mode,

         top_coord, bottom_coord);

     SetRectByCoord(control_item_rect,

         left_coord, right_coord, top_coord, bottom_coord);

     control_item->MoveWindow(control_item_rect);

 }  

 void ControlAutoLayout::SetDialogHandle(CWnd *wnd_dialog)

 {

     wnd_dialog_ = wnd_dialog;

 }

 void ControlAutoLayout::SetAutoLayoutEnable(bool is_auto_layout)

 {

     is_auto_layout_ = is_auto_layout;

 }

 void ControlAutoLayout::UpateControlOriginalRect(CWnd* control_item, CRect rect)

 {

     if (NULL == control_item)

     {

         return;

     }

     map_control_original_rect_[control_item] = rect;

 }

 void ControlAutoLayout::InitLayout(int window_width, int window_height)

 {

     //set the prev rect window first

     SetClientWindowRectOriginal(window_width, window_height);

     SetClientWindowRectNow(window_width, window_height);

     CalcHorizontalRatio();

     CalcVerticalRatio();

 }

 void ControlAutoLayout::SetClientWindowRectOriginal(

     int window_width, int window_height)

 {

     //the first time to call it, set the current window to original

     if ( == rect_client_window_original_.right

         &&  == rect_client_window_original_.bottom)

     {

         rect_client_window_original_.left = ;

         rect_client_window_original_.top = ;

         rect_client_window_original_.right = window_width;

         rect_client_window_original_.bottom = window_height;

     }

 }

 void ControlAutoLayout::SetClientWindowRectNow(

     int window_width, int window_height)

 {

     rect_client_window_now_.left = ;

     rect_client_window_now_.top = ;

     rect_client_window_now_.right = window_width;

     rect_client_window_now_.bottom = window_height;

 }

 void ControlAutoLayout::CalcHorizontalRatio()

 {

     double width_now = (double)rect_client_window_now_.Width();

     double width_prev = (double)rect_client_window_original_.Width();

     if (IsEqual(width_prev, 0.0))

     {

         horizontal_ratio_ = 0.0;

         return;

     }

     horizontal_ratio_ = width_now/width_prev;

     return;

 }

 void ControlAutoLayout::CalcVerticalRatio()

 {

     double height_now = (double)rect_client_window_now_.Height();

     double height_prev = (double)rect_client_window_original_.Height();

     if (IsEqual(height_prev, 0.0))

     {

         vertical_ratio_ = 0.0;

         return;

     }

     vertical_ratio_ = height_now/height_prev;

     return; 

 }

 void ControlAutoLayout::CalcHorizontalCoord(int left_change_mode,

                                          int right_change_mode, int &left_coord, int &right_coord)

 {

     int horizontal_change_mode =

         GetHorizontalChangeMode(left_change_mode, right_change_mode);

     switch (horizontal_change_mode)

     {

     case LEFT_PADDING_RIGHT_PADDING:

         CalcLeftPadRightPad(left_coord, right_coord);

         break;

     case LEFT_PADDING_RIGHT_RATIO:

         CalcLeftPadRightRatio(left_coord, right_coord);

         break;

     case LEFT_PADDING_RIGHT_FIXED_WIDTH:

         //do nothing

         break;

     case LEFT_RATIO_RIGHT_PADDING:

         CalcLeftRatioRightPad(left_coord, right_coord);

         break;

     case LEFT_RATIO_RIGHT_RATIO:

         CalcLeftRatioRightRatio(left_coord, right_coord);

         break;

     case LEFT_RATIO_RIGHT_FIXED_WIDTH:

         CalcLeftRatioRightFixedWidth(left_coord, right_coord);

         break;

     case LEFT_FIXED_WIDTH_RIGHT_PADDING:

         CalcLeftFixedWidthRightPad(left_coord, right_coord);

         break;

     case LEFT_FIXED_WIDTH_RIGHT_RATIO:

         CalcLeftFixedWidthRightRatio(left_coord, right_coord);

         break;

     case LEFT_FIXED_WIDTH_RIGHT_FIXED_WIDTH:

         //do nothing

         break;

     default:

         break;

     }

 }

 void ControlAutoLayout::CalcVerticalCoord(int top_change_mode, int bottom_change_mode,

                                        int &top_coord, int &bottom_coord)

 {

     int vertical_change_mode =

         GetVerticalChangeMode(top_change_mode, bottom_change_mode);

     switch (vertical_change_mode)

     {

     case TOP_PADDING_BOTTOM_PADDING:

         CalcTopPadBottomPad(top_coord, bottom_coord);

         break;

     case TOP_PADDING_BOTTOM_RATIO:

         CalcTopPadBottomRatio(top_coord, bottom_coord);

         break;

     case TOP_PADDING_BOTTOM_FIXED_HEIGHT:

         //do nothing

         break;

     case TOP_RATIO_BOTTOM_PADDING:

         CalcTopRatioBottomPad(top_coord, bottom_coord);

         break;

     case TOP_RATIO_BOTTOM_RATIO:

         CalcTopRatioBottomRatio(top_coord, bottom_coord);

         break;

     case TOP_RATIO_BOTTOM_FIXED_HEIGHT:

         CalcTopRatioBottomFixedHeight(top_coord, bottom_coord);

         break;

     case TOP_FIXED_HEIGHT_BOTTOM_PADDING:

         CalcTopFixedHeightBottomPad(top_coord, bottom_coord);

         break;

     case TOP_FIXED_HEIGHT_BOTTOM_RATIO:

         CalcTopFixedHeightBottomRatio(top_coord, bottom_coord);

         break;

     case TOP_FIXED_HEIGHT_BOTTOM_FIXED_HEIGHT:

         //do nothing

         break;

     default:

         break;

     }

 }

 //////////////////////////////////////////////////////////////////////////

 void ControlAutoLayout::CalcLeftPadRightPad(int &left_coord, int &right_coord)

 {

     //left coordinate does not need change

     //left_coord = left_coord;

     int right_pad_width_orginal = rect_client_window_original_.Width() - right_coord;

     right_coord = rect_client_window_now_.Width() - right_pad_width_orginal;

 }

 void ControlAutoLayout::CalcLeftPadRightRatio(int &left_coord, int &right_coord)

 {

     //left coordinate does not need change

     //left_coord = left_coord;

     int right_pad_width_orignal = rect_client_window_original_.Width() - right_coord;

     int right_pad_width_new = (int)(right_pad_width_orignal * horizontal_ratio_);

     right_coord = rect_client_window_now_.Width() - right_pad_width_new;

 }

 void ControlAutoLayout::CalcLeftRatioRightPad(int &left_coord, int &right_coord)

 {

     left_coord = (int)(left_coord * horizontal_ratio_);

     int right_pad_width_orginal = rect_client_window_original_.Width() - right_coord;

     right_coord = rect_client_window_now_.Width() - right_pad_width_orginal;

 }

 void ControlAutoLayout::CalcLeftRatioRightRatio(int &left_coord, int &right_coord)

 {

     left_coord = (int)(left_coord * horizontal_ratio_);

     int right_pad_width_orignal = rect_client_window_original_.Width() - right_coord;

     int right_pad_width_new = (int)(right_pad_width_orignal * horizontal_ratio_);

     right_coord = rect_client_window_now_.Width() - right_pad_width_new;

 }

 void ControlAutoLayout::CalcLeftRatioRightFixedWidth(int &left_coord, int &right_coord)

 {

     int width_original = right_coord - left_coord;

     left_coord = (int)(left_coord * horizontal_ratio_);

     right_coord = left_coord + width_original;

 }

 void ControlAutoLayout::CalcLeftFixedWidthRightPad(int &left_coord, int &right_coord)

 {

     int width_original = right_coord - left_coord;

     int right_pad_width_original = rect_client_window_original_.Width() - right_coord;

     right_coord = rect_client_window_now_.Width() - right_pad_width_original;

     left_coord = right_coord - width_original;

 }

 void ControlAutoLayout::CalcLeftFixedWidthRightRatio(int &left_coord, int &right_coord)

 {

     int width_original = right_coord - left_coord;

     int right_pad_width_original = rect_client_window_original_.Width() - right_coord;

     int right_pad_width_new = (int)(right_pad_width_original * horizontal_ratio_);

     right_coord = rect_client_window_now_.Width() - right_pad_width_new;

     left_coord = right_coord - width_original;

 }

 //////////////////////////////////////////////////////////////////////////

 void ControlAutoLayout::CalcTopPadBottomPad(int &top_coord, int &bottom_coord)

 {

     //

     top_coord = top_coord;

     int bottom_pad_height_original = rect_client_window_original_.Height() - bottom_coord;

     bottom_coord = rect_client_window_now_.Height() - bottom_pad_height_original;

 }

 void ControlAutoLayout::CalcTopPadBottomRatio(int &top_coord, int &bottom_coord)

 {

     //

     top_coord = top_coord;

     int bottom_pad_height_original = rect_client_window_original_.Height() - bottom_coord;

     int bottom_pad_height_new = (int)(bottom_pad_height_original * vertical_ratio_);

     bottom_coord = rect_client_window_now_.Height() - bottom_pad_height_new;

 }

 void ControlAutoLayout::CalcTopRatioBottomPad(int &top_coord, int &bottom_coord)

 {

     top_coord = (int)(top_coord * vertical_ratio_);

     int bottom_pad_height_original = rect_client_window_original_.Height() - bottom_coord;

     bottom_coord = rect_client_window_now_.Height() - bottom_pad_height_original;

 }

 void ControlAutoLayout::CalcTopRatioBottomRatio(int &top_coord, int &bottom_coord)

 {

     top_coord = (int)(top_coord * vertical_ratio_);

     int bottom_pad_height_original = rect_client_window_original_.Height() - bottom_coord;

     int bottom_pad_height_new = (int)(bottom_pad_height_original * vertical_ratio_);

     bottom_coord = rect_client_window_now_.Height() - bottom_pad_height_new;

 }

 void ControlAutoLayout::CalcTopRatioBottomFixedHeight(int &top_coord, int &bottom_coord)

 {

     int height_original = rect_client_window_original_.Height() - top_coord;

     top_coord = (int)(top_coord * vertical_ratio_);

     bottom_coord = rect_client_window_now_.Height() - height_original;

 }

 void ControlAutoLayout::CalcTopFixedHeightBottomPad(int &top_coord, int &bottom_coord)

 {

     int height_original = bottom_coord - top_coord;

     int bottom_pad_height_original = rect_client_window_original_.Height() - bottom_coord;

     bottom_coord = rect_client_window_now_.Height() - bottom_pad_height_original;

     top_coord = bottom_coord - height_original;

 }

 void ControlAutoLayout::CalcTopFixedHeightBottomRatio(int &top_coord, int &bottom_coord)

 {

     int height_original = bottom_coord - top_coord;

     int bottom_pad_height_original = rect_client_window_original_.Height() - bottom_coord;

     int bottom_pad_height_new = (int)(bottom_pad_height_original * vertical_ratio_);

     bottom_coord = rect_client_window_now_.Height() - bottom_pad_height_new;

     top_coord = bottom_coord - height_original;

 }

 //////////////////////////////////////////////////////////////////////////

 void ControlAutoLayout::InitControlRectInMap(CWnd* control_item)

 {

     CRect rect_control_item;

     if (NULL == control_item || NULL == wnd_dialog_)

     {

         return;

     }

     if (!IsExistControlRect(control_item))

     {

         control_item->GetWindowRect(&rect_control_item);

         wnd_dialog_->ScreenToClient(&rect_control_item);

         map_control_original_rect_[control_item] = rect_control_item;

     }

 }

 CRect ControlAutoLayout::GetControlRect(CWnd* control_item)

 {

     CRect rect_control_item;

     if (NULL == control_item || NULL == wnd_dialog_)

     {

         return rect_control_item;

     }

     if (IsExistControlRect(control_item))

     {

         rect_control_item = map_control_original_rect_[control_item];

     }

     else

     {

         control_item->GetWindowRect(&rect_control_item);

         wnd_dialog_->ScreenToClient(&rect_control_item);

     }

     return rect_control_item;

 }

 int ControlAutoLayout::GetHorizontalChangeMode(

     int left_change_mode, int right_change_mode)

 {

     //combine left mode and right mode

     // top_change_mode = 0, bottom_change_mode = 1

     //  =>   vertical_change_mode = 0x0001

     int horizontal_change_mode = (left_change_mode << ) + right_change_mode;

     return horizontal_change_mode;

 }

 int ControlAutoLayout::GetVerticalChangeMode(int top_change_mode, int bottom_change_mode)

 {

     //combine top mode and bottom mode

     // top_change_mode = 1, bottom_change_mode = 2

     //  =>   vertical_change_mode = 0x0102

     int vertical_change_mode = (top_change_mode << ) + bottom_change_mode;

     return vertical_change_mode;

 }

 void ControlAutoLayout::GetRectCoord(CRect rect,

                                   int &left_coord, int &right_coord, int &top_coord, int &bottom_coord)

 {

     left_coord = rect.left;

     right_coord = rect.right;

     top_coord = rect.top;

     bottom_coord = rect.bottom;

 }

 void ControlAutoLayout::SetRectByCoord(CRect &rect,

                                     int left_coord, int right_coord, int top_coord, int bottom_coord)

 {

     rect.left = left_coord;

     rect.top = top_coord;

     if (kcontrol_width_min > right_coord - left_coord)

     {

         rect.right = left_coord + kcontrol_width_min;

     }

     else

     {

         rect.right = right_coord;

     }

     if (kcontrol_height_min > bottom_coord - top_coord)

     {

         rect.bottom = top_coord + kcontrol_height_min;

     }

     else

     {

         rect.bottom = bottom_coord;

     }

 }

 bool ControlAutoLayout::IsExistControlRect(CWnd* control_item)

 {

     std::map<CWnd*,CRect>::iterator itr;

     itr = map_control_original_rect_.find(control_item);

     if (itr != map_control_original_rect_.end())

     {

         return true;

     }

     return false;

 }

 bool ControlAutoLayout::IsEqual(double x, double y)

 {

     double differ = std::abs(x - y);

     if (kdouble_precision >= differ)

     {

         return true;

     }

     return false;

 }

源码下载：AutoLayout.7z

reference：http://blog.csdn.net/beanjoy/article/details/9146375

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