定製一個BitmapButton類 (轉)

定製一個BitmapButton類 (轉)[@more@]

  本文詳敘了自制一個bitmapbutton類的一種製作方法。這個子定義的bitmapbutton類有類似於MFC種CBitmapButton類的功能。

  這個bitmapbutton有關聯四個點陣圖，分別一般狀態，按下狀態，焦點狀態，和無效狀態的點陣圖。該bitmapbutton類的能接受訊息，能向主視窗傳遞訊息。模仿了CBitmapButton類的大部分功能。

下面是該類的申明和實現。

//  FileName:BitmapButton.h: interface for the BitmapButton class.
//  Envionment:Visual C++ 6.0, 9x/2k
//
// Author:kaitty
// to::kaitty@x263">Email:kaitty@x263.net or nsi10102@nsi
// Date: 2002.2.10

//***********************************************************************************
//  說明：這是一個自定義的BitmapButton類，功能是使一個Button上關聯四個
//  點陣圖。
//  介面：HWND CreateBitmapButtonWindow(LPCSTR lpClassName,LPCSTR lpWindowName,D dwStyle,
//  int x,int y,int nWidth,int nHeight,
// HWND hwndParent,HMENU hmenu,HINSTANCE hInstance,
// UINT upBitmap,UINT downBitmap,UINT focitmap,UINT disableBitmap);
//  建立一個BitmapButton; 
//  int SetBitmap(HWND hwnd,UINT upBitmap,UINT downBitmap,UINT focusBitmap,UINT disableBitmap);
//  改變關聯Button的點陣圖。
//  BOOL EnableBitmapButton(HWND hwnd,BOOL bEnable);
//  使Button有效或無效。
//  int GetWindowState(HWND hwnd); 
//  獲取Button狀態；返回值為0，1，2，3中的一個。

#define WM_BITMAP  WM_USER+999  自己定義訊息，用於把button變為無效狀態

struct PrivateInfo{
 HBITMAP hbitmap0; 
 HBITMAP hbitmap1; 
 HBITMAP hbitmap2; 
 HBITMAP hbitmap3; 
 int state;
 };
class BitmapButton 
{
private:
 HWND m_hwnd; //  物件的視窗控制程式碼
public:
 virtual ~BitmapButton();
   BitmapButton(LPCTSTR lpClassName,LPCSTR lpWindowName,DWORD dwStyle,
  int x,int y,int nWidth,int nHeight,
  HWND hwndParent,HMENU hmenu,HINSTANCE hInstance,
  UINT upBitmap,UINT downBitmap,UINT focusBitmap,UINT disableBitmap);//構造
  BOOL EnableBitmapButton(HWND hwnd,BOOL bEnable); // 使button無效或有效

  int GetWindowState(HWND hwnd);  //  獲取 button得視窗控制程式碼
  int SetBitmap(HWND hwnd,UINT upBitmap,UINT downBitmap,UINT focusBitmap,UINT disableBitmap);  // 重新設定關聯點陣圖

};
 LRESULT CALLBACK ButtonProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam); //視窗函式

//  FileName:BitmapButton.cpp : implementation file
//  Envionment:Visual C++ 6.0,Windows 9x/2k
//
// Author:kaitty
//  or nsi10102@nsi
// Date: 2002.2.10

#include "stdafx.h"
#include "BitmapButton.h"
#include "re.h"

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

BitmapButton::~BitmapButton()
{

}

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

BitmapButton::BitmapButton(LPCTSTR lpClassName,LPCSTR lpWindowName,DWORD dwStyle,
 int x,int y,int nWidth,int nHeight,
 HWND hwndParent,HMENU hmenu,HINSTANCE hInstance,
 UINT upBitmap,UINT downBitmap,UINT focusBitmap,UINT disableBitmap)
{
 
 WNDCLASS wnd;
 wnd.cbClsExtra  = 0;
 wnd.cbWndExtra  = 0;
 wnd.hbrBackground  = NULL;
 wnd.hCursor  = LoadCursor(NULL,IDC_ARROW);
 wnd.hIcon  = NULL;
 wnd.hInstance  = (HINSTANCE)GetWindowLong(hwndParent,GWL_HINSTANCE);
 wnd.lpfnWndProc  = (WNDPROC)ButtonProc;
 wnd.lpszClassName  = lpClassName;
 wnd.lpszMenuName  = NULL;
 wnd.style  = CS_HREDRAW | CS_VREDRAW;
 
 if(!RegisterClass(&wnd)) return ;
  HWND hwnd;
   hwnd=CreateWindow(lpClassName,lpWindowName,dwStyle,
  x,y,nWidth,nHeight,hwndParent,hmenu,hInstance,NULL);
 
 PrivateInfo *pPrivateInfo=new PrivateInfo;
  pPrivateInfo->state=0;
 pPrivateInfo->hbitmap0=Loaitmap(hInstance,MAKEINTRESOURCE(upBitmap));
  pPrivateInfo->hbitmap1=LoadBitmap(hInstance,MAKEINTRESOURCE(downBitmap));
  pPrivateInfo->hbitmap2=LoadBitmap(hInstance,MAKEINTRESOURCE(focusBitmap));
 pPrivateInfo->hbitmap3=LoadBitmap(hInstance,MAKEINTRESOURCE(disableBitmap));

 SetWindowLong(hwnd,GWL_USERDATA,(long)pPrivateInfo);
 
 ShowWindow(hwnd,SW_SHOW);
 UpdateWindow(hwnd);
 m_hwnd = hwnd;
}

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

LRESULT CALLBACK ButtonProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
  int xPos,yPos;
  PrivateInfo *pPrivate;
  HRGN hrgn;
  HDC hdc,hdcmem;
  PAINTSTRUCT ps;
  RECT rect;

  GetWindowRect(hWnd,&rect);
  hrgn=CreateRectRgn(0,0,rect.right-rect.left,rect.bottom-rect.top);
  pPrivate=(PrivateInfo*)GetWindowLong(hWnd,GWL_USERDATA);
  xP= LOWORD(lParam);
  yPos = HIWORD(lParam);
 
 switch (message)
 {
 case WM_CREATE:
 break;
  case WM_COMMAND:
  break;
 case WM_PAINT:
 RECT rt;
 hdc = BeginPaint(hWnd, &ps);
 // TODO: Add any drawing code here...
 GetClientRect(hWnd, &rt);
 BITMAP bm;
  hdcmem=CreateCompatibleDC(hdc);
 switch(pPrivate->state)
 {
 case 0:(hdcmem,pPrivate->hbitmap0);
  GetObject(pPrivate->hbitmap0,sizeof(BITMAP),&bm);break;
 case 1:SelectObject(hdcmem,pPrivate->hbitmap1);
  GetObject(pPrivate->hbitmap1,sizeof(BITMAP),&bm);break;
 case 2:SelectObject(hdcmem,pPrivate->hbitmap2);
  GetObject(pPrivate->hbitmap2,sizeof(BITMAP),&bm);break;
 case 3:SelectObject(hdcmem,pPrivate->hbitmap3);
  GetObject(pPrivate->hbitmap3,sizeof(BITMAP),&bm);break;
 }
 StretchBlt(hdc,0,0,rect.right-rect.left,rect.bottom-rect.top,hdcmem,0,0,bm.bmWidth,bm.bmHeight,SRCCOPY);
 DeleteDC(hdcmem);
 EndPaint(hWnd, &ps);
 break;
 case WM_DESTROY:
  DeleteObject(pPrivate->hbitmap0);
  DeleteObject(pPrivate->hbitmap1);
  DeleteObject(pPrivate->hbitmap2);
  DeleteObject(pPrivate->hbitmap3);
  DestroyWindow(hWnd);
 break;
 case WM_LBUTTONDOWN:
   if(pPrivate->state!=3)
 {
 pPrivate->state=2;
 if(!(GetCapture()==hWnd)) SetCapture(hWnd);
 InvalidateRect(hWnd,NULL,0);
 };
 break;
 case WM_LBUTTONUP:
  if(pPrivate->state!=3)
  {
  ReleaseCapture();
  pPrivate->state=0;
  if(PtInRegion(hrgn,xPos,yPos))
  SendMessage(GetParent(hWnd),WM_COMMAND,GetWindowLong(hWnd,GWL_ID),0);
  };
  break;
 case WM_MOUSEMOVE:
 HCURSOR hcur; 
  if(pPrivate->state!=3)
  { 
  if(!(GetCapture()==hWnd)) SetCapture(hWnd);
  hcur=LoadCursor((HINSTANCE)GetWindowLong(GetParent(hWnd),GWL_HINSTANCE),MAKEINTRESOURCE(IDC_HAND));
  SetCursor(hcur);
  if((GetCapture()==hWnd)&&(!PtInRegion(hrgn,xPos,yPos)))
  { pPrivate->state=0; ReleaseCapture();}
  else pPrivate->state=1;
  InvalidateRect(hWnd,NULL,0);
  };
  break;
 case WM_BITMAP:
 if(wParam==1) pPrivate->state=0;
 else pPrivate->state=3;
 InvalidateRect(hWnd,NULL,0);
 break;
 default:
 return DefWindowProc(hWnd, message, wParam, lParam);
  }
  return 0;
}

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

BOOL BitmapButton::EnableBitmapButton(HWND hwnd,BOOL bEnable)
{
 
 SendMessage(hwnd,WM_BITMAP,bEnable,0);
 
 return true;
}

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

int BitmapButton::GetWindowState(HWND hwnd)
{
 PrivateInfo *pPrivate;
 
 pPrivate=(PrivateInfo*)GetWindowLong(hwnd,GWL_USERDATA);
 
 return pPrivate->state;
}

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

int BitmapButton::SetBitmap(HWND hwnd,UINT upBitmap,UINT downBitmap,UINT focusBitmap,UINT disableBitmap)
{
 PrivateInfo *pPrivateInfo=new PrivateInfo;
 
 pPrivateInfo=(PrivateInfo*)GetWindowLong(hwnd,GWL_USERDATA);
 
 DeleteObject(pPrivateInfo->hbitmap0);
 DeleteObject(pPrivateInfo->hbitmap1);
 DeleteObject(pPrivateInfo->hbitmap2);
 DeleteObject(pPrivateInfo->hbitmap3);
   
 pPrivateInfo->hbitmap0=LoadBitmap((HINSTANCE)GetWindowLong(GetParent(hwnd),GWL_HINSTANCE),MAKEINTRESOURCE(upBitmap));
  pPrivateInfo->hbitmap1=LoadBitmap((HINSTANCE)GetWindowLong(GetParent(hwnd),GWL_HINSTANCE),MAKEINTRESOURCE(downBitmap));
  pPrivateInfo->hbitmap2=LoadBitmap((HINSTANCE)GetWindowLong(GetParent(hwnd),GWL_HINSTANCE),MAKEINTRESOURCE(focusBitmap));
 pPrivateInfo->hbitmap3=LoadBitmap((HINSTANCE)GetWindowLong(GetParent(hwnd),GWL_HINSTANCE),MAKEINTRESOURCE(disableBitmap));
 
 return true;
}