以下代码将演示一个150像数高的文件打开对话框,这个例子很简单,我们要做的就是让对话框更好看和有更多的用途。我们需要考虑的是怎么样用MFC来更简单的定义我们自己的对话框,这儿有许多地方是比较灵活的,所以我们可以把它搞得很好看。
如果我们想改变对话框中控件的大小或者是它的显示的样子,当然包括对话框本身,仅仅使用GetDlgItem()函数是不够的,因为控件是对话框子集中的一部分。控件的ID在头文件dlgs.h中的定义如下: stc3,stc2 控件的标签(文件名和文件类型) edt1,cmb1 编辑框控件和滚动条 IDOK,IDCANCEL OK和CANCEL按钮 lst1 显示文件名的窗口
当然如果你要用其它的控件的话,在头文件中还有其它的定义,以下的CMyFileDialog类是从CFileDialog中的派生出来的,这当中我还添加了一个消息句柄WM_INITDIALOG。以下是原代码:
//////////////////////////////////////////////////////////////// // This is where the real action is going on // Remember #include <dlgs.h> BOOL CMyFileDialog::OnInitDialog() // Override { // This variable should be changed acording to your wishes // about the size of the finished dialog const UINT iExtraSize = 150; // Number of controls in the File Dialog const UINT nControls = 7;
// Get a pointer to the original dialog box. CWnd *wndDlg = GetParent();
RECT Rect; wndDlg->GetWindowRect(&Rect); // Change the size wndDlg->SetWindowPos(NULL, 0, 0, Rect.right - Rect.left, Rect.bottom - Rect.top + iExtraSize, SWP_NOMOVE);
// Control ID's - defined in <dlgs.h> UINT Controls[nControls] = {stc3, stc2, // The two label controls edt1, cmb1, // The eidt control and the drop-down box IDOK, IDCANCEL, lst1}; // The Explorer window
// Go through each of the controls in the dialog box, and move them to a new position for (int i=0 ; i<nControls ; i++) { CWnd *wndCtrl = wndDlg->GetDlgItem(Controls[i]); wndCtrl->GetWindowRect(&Rect); wndDlg->ScreenToClient(&Rect); // Remember it is child controls
// Move all the controls according to the new size of the dialog. if (Controls[i] != lst1) wndCtrl->SetWindowPos(NULL, Rect.left, Rect.top + iExtraSize, 0, 0, SWP_NOSIZE); else // This is the explorer like window. It should be sized - not moved. wndCtrl->SetWindowPos(NULL, 0, 0, Rect.right - Rect.left, Rect.bottom - Rect.top + iExtraSize, SWP_NOMOVE); }
// Remember to call the baseclass. return CFileDialog::OnInitDialog(); } |