//头文件：
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//文件名称：Alignability.h
//功能说明： 使你的窗口具有子窗口对齐能力。
//用法说明：1，设置父窗口类的句柄。(对于基于对话框的程序，在OnInitDialog函数中调用。)
// 2，调用SetItemAlignable函数，传入一个子窗口句柄及对齐方式(对齐方式可用按位或运算符多选)。
// 如果父窗口句柄及相应子窗口的句柄无效，或子窗口句柄并非父窗口的子窗口，函数调用将失败。
// (对于基于对话框的程序，在OnInitDialog函数中调用。)
// 3，当你的窗口的子控件需要对齐的时候，调用Align函数。(通常在父窗口的WM_SIZE消息
// 处理函数中调用。
//备注：为了使它能用于其它C系统编程环境，我避免了对MFC类的使用，这让代码有点发福，如果要用于C
// 语言SDK编程就要将vector用数组代替...
// 2005-2-28. writer by txf.
// 如果你有更好的改进，记得通知我：tangxinfa@sina.com
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#ifndef ALIGNABILITY_H_
#define ALIGNABILITY_H_
#include "windows.h"
#include <vector>
using std::vector;
enum AlignType{
leftalign = 1,
topalign = 2,
rightalign = 4,
bottomalign = 8
};
class CAlignability
{
public:
BOOL SetParentHwnd(HWND hwndParent);
HWND GetParentHwnd() const;
void Align(); //进行对齐。
struct AlignCfg{
public:
AlignCfg(HWND hwndChild, AlignType eType, RECT oriEDs)
:m_hwndChild(hwndChild), m_oriEDs(oriEDs), m_eType(eType){}
HWND m_hwndChild;//子窗口的句柄.
AlignType m_eType; //对齐方式.
RECT m_oriEDs; //子控件初始时（通常为设计时）到父窗口的四边的边距.
};
CAlignability(HWND hwndParent);
virtual ~CAlignability();
BOOL SetItemAlignable(UINT nSubWndId, AlignType aligntype);
BOOL SetItemAlignable(HWND hwndChild, AlignType aligntype);
private:
HWND m_hwndParent;
vector<AlignCfg> m_alignset;
};
#endif //ALIGNABILITY_H_
//实现文件：
// Alignable.cpp: implementation of the CAlignable class.
//
//////////////////////////////////////////////////////////////////////
#include "Alignability.h"
#include <assert.h>
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CAlignability::CAlignability(HWND hwndParent)
:m_hwndParent(hwndParent)
{
assert(::IsWindow(m_hwndParent));
}
CAlignability::~CAlignability()
{
}
BOOL CAlignability::SetItemAlignable(UINT nSubWndId, AlignType aligntype)
{
HWND hwndChild(GetDlgItem(m_hwndParent, nSubWndId));
return SetItemAlignable(hwndChild, aligntype);
}
BOOL CAlignability::SetItemAlignable(HWND hwndChild, AlignType aligntype)
{
if(! ::IsWindow(m_hwndParent))
{
assert(0);//Parent window is Invalid.
return FALSE;
}
RECT subWndRect, parentWndRect;
::GetClientRect(m_hwndParent, &parentWndRect);
if(::IsWindow(hwndChild))
{
::GetWindowRect(hwndChild, &subWndRect);
POINT pt;
pt.x = subWndRect.left; pt.y = subWndRect.top;
::ScreenToClient(m_hwndParent, &pt);
subWndRect.left = pt.x, subWndRect.top = pt.y;
pt.x = subWndRect.right; pt.y = subWndRect.bottom;
::ScreenToClient(m_hwndParent, &pt);
subWndRect.right = pt.x, subWndRect.bottom = pt.y;
RECT oriEDs;
oriEDs.left = subWndRect.left - parentWndRect.left;
oriEDs.right = parentWndRect.right - subWndRect.right;
oriEDs.top = subWndRect.top - parentWndRect.top;
oriEDs.bottom = parentWndRect.bottom - subWndRect.bottom;
m_alignset.push_back(AlignCfg(hwndChild, aligntype, oriEDs));
return true;
}
return FALSE;
}
void CAlignability::Align()
{
if(! ::IsWindow(m_hwndParent))
{
assert(0);//Can't AAlign: Parent window is Invalid.
return;
}
RECT rect;
::GetClientRect(m_hwndParent, &rect);
const int cxParent = rect.right - rect.left;
const int cyParent = rect.bottom - rect.top;
HWND hwndChild = 0;
for(long i=0, n=m_alignset.size(); i < n; ++i)
{
hwndChild = m_alignset[i].m_hwndChild;
if(::IsWindow(hwndChild) && ::IsChild(m_hwndParent, hwndChild))
{
::GetWindowRect(hwndChild, &rect);
POINT pt;
pt.x = rect.left; pt.y = rect.top;
::ScreenToClient(m_hwndParent, &pt);
rect.left = pt.x, rect.top = pt.y;
pt.x = rect.right; pt.y = rect.bottom;
::ScreenToClient(m_hwndParent, &pt);
rect.right = pt.x, rect.bottom = pt.y;
const int oriWidth = rect.right - rect.left;
const int oriHeight= rect.bottom - rect.top;
if(m_alignset[i].m_eType & leftalign)
{
rect.left = m_alignset[i].m_oriEDs.left;
if(!(m_alignset[i].m_eType & rightalign))
rect.right = rect.left + oriWidth; //保持宽度不变.
}
if(m_alignset[i].m_eType & topalign)
{
rect.top = m_alignset[i].m_oriEDs.top;
if(!(m_alignset[i].m_eType & bottomalign))
rect.bottom = rect.top + oriHeight; //保持高度不变.
}
if(m_alignset[i].m_eType & rightalign)
{
rect.right = cxParent - m_alignset[i].m_oriEDs.right;
if(!(m_alignset[i].m_eType & leftalign))
rect.left = rect.right - oriWidth; //保持宽度不变.
}
if(m_alignset[i].m_eType & bottomalign)
{
rect.bottom = cyParent - m_alignset[i].m_oriEDs.bottom;
if(!(m_alignset[i].m_eType & topalign))
rect.top = rect.bottom - oriHeight; //保持高度不变.
}
::MoveWindow(hwndChild, rect.left, rect.top, rect.right - rect.left, rect.bottom - rect.top, TRUE);
}
else
{
assert(0); //SetAlign to a item failed.
}
}
}
HWND CAlignability::GetParentHwnd() const
{
return m_hwndParent;
}
BOOL CAlignability::SetParentHwnd(HWND hwndParent)
{
if(::IsWindow(hwndParent))
{
m_hwndParent == hwndParent;
return TRUE;
}
return FALSE;
}