//頭文件://////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//文件名稱:Alignability.h
//功能說明: 使你的窗口具有子窗口對齊能力。
//用法說明:1,在你的父窗口類中定義一個對齊類對象(當然也可放在類外).如: CAlignability m_align;
// 2,爲對齊類對象設置父窗口類的句柄。如: m_align.SetParentHwnd(GetSafeHwnd()); (對於基於對話框的程序,在OnInitDialog函數中調用。)
// 3,調用對齊類對象的AddAlignItem函數,傳入一個子窗口句柄或ID及對齊方式(對齊方式可用按位或運算符多選)。
// 如果對齊類對象中父窗口句柄及相應子窗口的句柄無效,或子窗口句柄並非父窗口的子窗口,函數調用將失敗。
// 如:RECT eds = {0, 0, 0, 0}; m_align.AddAlignItem(IDC_EDIT_CONTENT, leftalign|topalign|rightalign|bottomalign, &eds);
// (對於基於對話框的程序,在OnInitDialog函數中調用。),在大部分情況下,你可以忽略AddAlignItem函數的最後一個參數,
// 這個參數是用來顯示設置相應子控件的四邊到父窗口四邊的距離(以像素爲單位),這對於非設計期放置的子控件的對齊設置很有用.
// 4,當你的窗口的子控件需要對齊的時候,調用Align函數。如:m_align.Align(); (通常在父窗口的WM_SIZE消息處理函數中調用)。
//備註:爲了使它能用於其它C系統編程環境,我避免了對MFC類的使用,這讓代碼有點發福,如果要用於C
// 語言SDK編程就要將vector用數組代替...
// 2005-2-28. writer by txf.
// 如果你有更好的改進,記得通知我:[email protected]
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
#ifndef ALIGNABILITY_H_
#define ALIGNABILITY_H_
#include "windows.h"
#include <vector>
using std::vector;
enum AlignType{
leftalign = 1, //左對齊。
topalign = 2, //上對齊。
rightalign = 4, //右對齊。
bottomalign = 8 //下對齊。
};
class CAlignability
{
public:
BOOL SetParentHwnd(HWND hwndParent);
HWND GetParentHwnd() const;
void Align(); //進行對齊。
struct AlignCfg{
public:
AlignCfg(HWND hwndChild, int eType, RECT oriEDs)
:m_hwndChild(hwndChild), m_oriEDs(oriEDs), m_eType(eType){}
HWND m_hwndChild;//子窗口的句柄.
int m_eType; //對齊方式.
RECT m_oriEDs; //子控件初始時(通常爲設計時)到父窗口的四邊的邊距.
};
CAlignability(HWND hwndParent=0);
virtual ~CAlignability();
BOOL AddAlignItem(int nSubWndId, int aligntype, RECT* lpEDs=0);
BOOL AddAlignItem(HWND hwndChild, int aligntype, RECT* lpEDs=0);
private:
HWND m_hwndParent;
vector<AlignCfg> m_alignset;
};
#endif //ALIGNABILITY_H_
//實現文件://////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
文件名稱:Alignability.cpp
#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/*=0*/)
:m_hwndParent(hwndParent)
{
assert(::IsWindow(m_hwndParent));
}
CAlignability::~CAlignability()
{
}
BOOL CAlignability::AddAlignItem(int nSubWndId, int aligntype, RECT* lpEDs/* =0 */)
{
HWND hwndChild(GetDlgItem(m_hwndParent, nSubWndId));
return AddAlignItem(hwndChild, aligntype, lpEDs);
}
BOOL CAlignability::AddAlignItem(HWND hwndChild, int aligntype, RECT* lpEDs/* =0 */)
{
if(! ::IsWindow(m_hwndParent))
{
assert(0);//Parent window is Invalid.
return FALSE;
}
RECT subWndRect, parentWndRect;
::GetClientRect(m_hwndParent, &parentWndRect);
if(::IsWindow(hwndChild))
{
RECT oriEDs;
if(lpEDs)
oriEDs = *lpEDs;
else
{
::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;
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; //保持寬度不變.
}
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; //保持高度不變.
}
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; //保持寬度不變.
}
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; //保持高度不變.
}
::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;
}