Windows下定制打开对话框
用于打开系统Open Dialog的函数为GetOpenFileNameBOOL GetOpenFileNameA(
LPOPENFILENAMEA Arg1
);
如果需要在对话框上定制内容，则需要为OPENFILENAME结构的lpfnHook赋值。一般也需要对lpTemplateName赋值，因为需要引用到定义的资源。lCustData是与对话框通信的结构。Flags需要加上OFN_EXPLORER | OFN_ENABLETEMPLATE | OFN_ENABLEHOOK
示例代码如下：BOOL _stdcall FileOpenDlgCheckBox(HWND hwnd, PTSTR pstrFileName,
PTSTR pstrTitleName, TCHAR *Filter, int *bCheck)
{
FileInitialize(hwnd);
ofn.hwndOwner = hwnd;
ofn.lpstrFile = pstrFileName;
ofn.lpstrTitle = pstrTitleName;
ofn.lpstrFilter = Filter;
ofn.Flags =
OFN_OVERWRITEPROMPT | OFN_PATHMUSTEXIST |
OFN_HIDEREADONLY | OFN_EXPLORER | OFN_ENABLETEMPLATE | OFN_ENABLEHOOK;
LRESULT CALLBACK OFNCheckBox(HWND, UINT, WPARAM, LPARAM);
ofn.lCustData = (LPARAM)bCheck;
ofn.lpfnHook = (LPOFNHOOKPROC)OFNCheckBox;
ofn.lpTemplateName = MAKEINTRESOURCE(IDD_LITTLE_UV);
return GetOpenFileName(&ofn);
}
static void _stdcall GetCbSpace(HWND hDlg, int *W, int *H, int *X, int *Y)
{
HWND hParent = GetParent(hDlg);
// 1, 2为打开和取消Button的资源ID，可用Spy++查看
HWND hBtnO = GetDlgItem(hParent, 1);
HWND hBtnC = GetDlgItem(hParent, 2);
RECT Ro, Rc, Rd;
GetWindowRect(hBtnO, &Ro);
GetWindowRect(hBtnC, &Rc);
GetWindowRect(hDlg, &Rd);
int Margin = Rc.top - Ro.top;
*W = Rc.right - Rc.left;
*H = Rc.bottom - Rc.top;
*X = Ro.left - Rd.left; // dialog template relative position
*Y = Ro.top - Rd.top + Margin + *H;
}
LRESULT CALLBACK OFNCheckBox(HWND hDlg, UINT UMessage, WPARAM WParam, LPARAM LParam)
{
static HWND hCb;
static int *pData;
switch(UMessage)
{
case WM_INITDIALOG:
{
LPOPENFILENAME Ofn = (LPOPENFILENAME)LParam;
pData = (int*)Ofn->lCustData;
SendDlgItemMessage(hDlg, 3000, BM_SETCHECK, *pData, 0);
hCb = GetDlgItem(hDlg, 3000);
return 0;
}
case WM_SIZE:
{
int X, Y, W, H;
GetCbSpace(hDlg, &W, &H, &X, &Y);
SetWindowPos(hCb, NULL, X, Y, W, H, SWP_NOZORDER);
return 0;
}
case WM_COMMAND:
switch(HIWORD(WParam))
{
case BN_CLICKED:
{
if(LOWORD(WParam) == 3000)
{
int bCheck =
SendDlgItemMessage(hDlg, 3000, BM_GETCHECK, 0, 0);
*pData = bCheck;
}
return 1;
}
}
return 0;
}
return 0;
}