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[小哼哼L]

如何用三个滑块，分别是红绿蓝，实现改变对话框的背景颜色？

[老火]

1、创建成员变量HBRUSH m_brush; 2、滑块变化时响应函数里m_brush.CreateSolidBrush(RGB(r, g, b)； 2、重载对话框OnCtlColor，在该函数里面返回画刷句柄m_brush

[wawLwxj]

首先设置三个滑块的范围0~255，填充对话框背景你应该会了。在对话框类头文件中声明变量COLORREF color;及BYTE r; BYTE g; BYTE b; BOOL CTestDlg::OnEraseBkgnd(CDC* pDC) { // TODO: Add your message handler code here and/or call default color = RGB(r,g,b); CRect rect; this->GetClientRect(rect); pDC->FillSolidRect(rect, color); return TRUE; return CDialog::OnEraseBkgnd(pDC); } 把三个滑块的值获取过来赋给r,g,b就OK了

[小哼哼L]

引用 2 楼 wxj198904 的回复:

首先设置三个滑块的范围0~255，填充对话框背景你应该会了。在对话框类头文件中声明变量COLORREF color;及BYTE r; BYTE g; BYTE b; BOOL CTestDlg::OnEraseBkgnd(CDC* pDC) { // TODO: Add your message handler code here and/or call default ……

不好意思，刚开始学，能再具体点么？

[schlafenhamster]

整个程序： #define _WIN32_WINNT 0x400 #include <windows.h> #include <stdio.h> // LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) { WNDCLASS wndclass; HWND hwnd; MSG msg; TCHAR *szName="COL"; wndclass.cbClsExtra=NULL; wndclass.cbWndExtra=NULL; wndclass.hbrBackground=CreateSolidBrush(0); wndclass.hCursor=LoadCursor(NULL,IDC_ARROW); wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION); wndclass.hInstance=hInstance; wndclass.lpfnWndProc=WndProc; wndclass.lpszClassName=szName; wndclass.lpszMenuName=NULL; wndclass.style=CS_VREDRAW | CS_HREDRAW; if(!RegisterClass(&wndclass)) { MessageBox(NULL,"This Pro Need Windows NT!", "Error",MB_OK); return 0; } hwnd=CreateWindow(szName,szName, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT, NULL,NULL,hInstance,NULL); ShowWindow(hwnd,nShowCmd); UpdateWindow(hwnd); while (GetMessage(&msg,NULL,0,0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } WNDPROC OldStatic; // LRESULT CALLBACK StaticProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { HWND hparentwnd; PAINTSTRUCT ps; HDC hdc; HBRUSH brsh; char Prompt[40]; // int id; static TRACKMOUSEEVENT tme; static DWORD counter=0; switch(message) { case WM_PAINT: //如果处理了此消息，WM_CTLCOLORSTATIC也无效了 // OutputDebugString("StaticProc3\n"); // return CallWindowProc(OldStatic, hwnd, message, wParam, lParam ); hparentwnd=GetParent(hwnd); // id=GetDlgCtrlID(hwnd); // sprintf(Prompt,"%d",id); // OutputDebugString(Prompt); //OutputDebugString("Before BeginPaint\n"); hdc = BeginPaint(hwnd, &ps); //OutputDebugString("After BeginPaint\n"); //!!! brsh=(HBRUSH) SendMessage(hparentwnd,WM_CTLCOLORSTATIC,(WPARAM)hdc,(LPARAM)hwnd); ::FillRect(hdc,&ps.rcPaint,brsh); //!!! TextOut(hdc, 10, 1, "Color Red", 9); EndPaint(hwnd, &ps); return 0; case WM_ERASEBKGND: //OutputDebugString("Inside BeginPaint\n"); //hdc = (HDC) wParam; return 1;//handled case WM_MOUSEMOVE: // TRACKMOUSEEVENT tme;SystemParametersInfo SPI_GETMOUSEHOVERTIME tme.cbSize = sizeof(tme); tme.dwFlags = TME_HOVER|TME_LEAVE; tme.dwHoverTime = 15; tme.hwndTrack = hwnd; TrackMouseEvent(&tme); break; case WM_MOUSEHOVER: counter++; sprintf(Prompt,"WM_MOUSEHOVER: %d\r\n",counter); OutputDebugString(Prompt); TrackMouseEvent(&tme); break; // case WM_KEYDOWN: // if(wParam==VK_TAB) // { // HWND wnd=GetFocus(); // int next=GetDlgCtrlID(wnd); // wnd=GetDlgItem(hwnd,next++); // SetFocus(wnd); // } // break; } return CallWindowProc( OldStatic, hwnd, message, wParam, lParam ); } // LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam) { static HBRUSH hStaticBrush,hBrush[3]; static int x,y,vsPos[3],cxClient,cyClient; static TCHAR *szText[3]={"RED","GREEN","BLUE"},szBuffer[10]; static HWND hwndScroll[3],hwndText[3],hwndValue[3],hwndShow; static COLORREF crText[3],crShow; static RECT rt; int i; switch (message) { case WM_CREATE: hwndShow=CreateWindow("static",NULL, WS_CHILD | WS_VISIBLE | SS_WHITERECT, 0,0,0,0, hwnd,(HMENU)9,//ID=9 (HINSTANCE)GetWindowLong(hwnd,GWL_HINSTANCE),NULL); for(i=0;i<3;i++) { hwndScroll[i]=CreateWindow("scrollbar",NULL, WS_CHILD | WS_VISIBLE | SBS_VERT, 0,0,0,0, hwnd,(HMENU)i,//ID=0-2 (HINSTANCE)GetWindowLong(hwnd,GWL_HINSTANCE),NULL); SetScrollRange(hwndScroll[i],SB_CTL,0,255,TRUE); SetScrollPos(hwndScroll[i],SB_CTL,0,TRUE); hwndText[i]=CreateWindow("static",szText[i],//"RED..." WS_CHILD | WS_VISIBLE | WS_TABSTOP | SS_CENTER | SS_NOTIFY, 0,0,0,0, hwnd,(HMENU)(i+3),//ID=3,4,5 (HINSTANCE)GetWindowLong(hwnd,GWL_HINSTANCE),NULL); if(hwndText[i]) OldStatic=(WNDPROC)SetWindowLong(hwndText[i],GWL_WNDPROC,(LONG)StaticProc); hwndValue[i]=CreateWindow("static","0", WS_CHILD | WS_VISIBLE | SS_CENTER, 0,0,0,0, hwnd,(HMENU)(i+6),//ID=6,7,8 (HINSTANCE)GetWindowLong(hwnd,GWL_HINSTANCE),NULL); // crText[2-i]=(255<<(i*4)); vsPos[i]=0; // hBrush[i]=CreateSolidBrush(crText[i]); } // hStaticBrush=CreateSolidBrush(RGB(255,200,100));//GetSysColor(COLOR_BTNHIGHLIGHT)); return 0; case WM_SIZE: cxClient=LOWORD(lParam); cyClient=HIWORD(lParam); MoveWindow(hwndShow,0,0,cxClient/2,cyClient,TRUE); for(i=0;i<3;i++) { MoveWindow(hwndText[i], cxClient/36+cxClient*i/6, cyClient/15, cxClient/9, cyClient/15, TRUE); MoveWindow(hwndScroll[i], cxClient/36+cxClient*i/6, cyClient*23/100, cxClient/9, cyClient*27/50, TRUE); MoveWindow(hwndValue[i], cxClient/36+cxClient*i/6, cyClient*13/15, cxClient/9, cyClient/15, TRUE); InvalidateRect(hwndText[i],NULL,TRUE); } SetRect(&rt,cxClient/2,0,cxClient,cyClient); return 0; case WM_VSCROLL: i=GetWindowLong((HWND)lParam,GWL_ID); vsPos[i]=GetScrollPos(hwndScroll[i],SB_CTL); switch(LOWORD(wParam)) { case SB_LINEUP: vsPos[i]-=1; break; case SB_LINEDOWN: vsPos[i]+=1; break; case SB_PAGEUP: vsPos[i]-=10; break; case SB_PAGEDOWN: vsPos[i]+=10; break; case SB_THUMBPOSITION: case SB_THUMBTRACK: vsPos[i]=HIWORD(wParam); break; } vsPos[i]=max(0,min(vsPos[i],255)); SetScrollPos(hwndScroll[i],SB_CTL,vsPos[i],TRUE); wsprintf(szBuffer,"%i",vsPos[i]); SetWindowText(hwndValue[i],szBuffer); crShow=RGB(vsPos[0],vsPos[1],vsPos[2]); SetClassLong(hwnd,GCL_HBRBACKGROUND,(long)CreateSolidBrush(crShow)); crText[0]=RGB(vsPos[0],0,0); crText[1]=RGB(0,vsPos[1],0); crText[2]=RGB(0,0,vsPos[2]); // SetWindowText(hwndText[i],szText[i]); InvalidateRect(hwndText[i],NULL,TRUE); InvalidateRect(hwnd,&rt,TRUE); break; // return 0; case WM_CTLCOLORSCROLLBAR : i = GetWindowLong ((HWND) lParam, GWL_ID) ; hBrush[i]=CreateSolidBrush(crText[i]); return (LRESULT) hBrush[i] ; case WM_CTLCOLORSTATIC: SetBkMode((HDC)wParam,TRANSPARENT);// i=GetWindowLong((HWND)lParam,GWL_ID); switch(i) { case 3: SetTextColor((HDC)wParam,crText[i%3]); SetBkColor((HDC)wParam,RGB(255,255,255)); // OutputDebugString("WM_CTLCOLORSTATIC3\n"); return (LRESULT) hStaticBrush; break; case 4: SetTextColor((HDC)wParam,crText[i%3]); SetBkColor((HDC)wParam,RGB(255,255,255)); OutputDebugString("4\n"); return (LRESULT)hStaticBrush; break; case 5: SetTextColor((HDC)wParam,crText[i%3]); SetBkColor((HDC)wParam,RGB(255,255,255)); OutputDebugString("5\n"); return (LRESULT)hStaticBrush; break; //#if 0 case 6: SetTextColor((HDC)wParam,crText[i%3]); SetBkColor((HDC)wParam,RGB(255,255,255)); OutputDebugString("6\n"); return (LRESULT)hStaticBrush; break; case 7: SetTextColor((HDC)wParam,crText[i%3]); SetBkColor((HDC)wParam,RGB(255,255,255)); OutputDebugString("7\n"); return (LRESULT)hStaticBrush; break; case 8: SetTextColor((HDC)wParam,crText[i%3]); SetBkColor((HDC)wParam,RGB(255,255,255)); OutputDebugString("8\n"); return (LRESULT)hStaticBrush; break; //#endif } break; case WM_SYSCOLORCHANGE : DeleteObject (hStaticBrush) ; hStaticBrush = CreateSolidBrush (GetSysColor (COLOR_BTNHIGHLIGHT)) ; return 0 ; case WM_DESTROY: PostQuitMessage(0); return 0; } return DefWindowProc(hwnd,message,wParam,lParam); }

[er天]

小伙！！呵呵

[schlafenhamster]

三个滑块的值： COLORREF crShow; crShow=RGB(vsPos[0],vsPos[1],vsPos[2]);

[Luo_Bryant]

5楼

[wawLwxj]

您不能建个MFC工程吗？飞地用Win32啊！太牛x了