Maximize window or adjust the size drop-down list box after Combo box does not display the drop-down-CodePudding

I use Visual Studio 2008 set up a dialog box procedure, using MFC to achieve maximum window size or adjust the options in the drop-down list after showed no, can't the drop-down displays all the options, I call GetDlgItem - & gt; ResetContent and GetDlgItem - & gt; AddString doesn't solve the problem, first thank you,

 void CSimApplianceDlg: : ReSize (void) 
{
Float FSP [2]. 
POINT Newp;//get the size of the dialog now 
CRect recta; 
GetClientRect (& amp; Recta);//in the client area size 
Newp. X=recta. Right - recta. Left; 
Newp) y=recta) bottom - recta. Top; 
FSP [0]=(float) Newp. X/old. X. 
FSP [1]=(float) Newp. Y/old. Y; 
CRect the Rect. 
Int woc. 
CPoint OldTLPoint TLPoint;//the top left corner 
CPoint OldBRPoint BRPoint;//at the bottom right 
HWND hwndChild=: : GetWindow (m_hWnd, GW_CHILD);//list all control 
While (hwndChild) {
Woc=: : GetDlgCtrlID (hwndChild);//ID 
GetDlgItem (woc) - & gt; GetWindowRect (the Rect); 
The ScreenToClient (the Rect); 
OldTLPoint=the Rect. TopLeft (); 
TLPoint. X=long (OldTLPoint. * x FSP [0]). 
TLPoint. Y=long (OldTLPoint. * y FSP [1]). 
OldBRPoint=the Rect. BottomRight (); 
BRPoint. X=long (OldBRPoint. * x FSP [0]). 
BRPoint. Y=long (OldBRPoint. * y FSP [1]). 
The Rect. SetRect (TLPoint BRPoint); 
GetDlgItem (woc) - & gt; MoveWindow (the Rect, TRUE); 
HwndChild=: : GetWindow (hwndChild GW_HWNDNEXT); 
} 
Old=Newp; 
}

CodePudding user response:

MCombox. SetItemHeight (1, nHeight) adjust

CodePudding user response:

reference 1st floor zgl7903 response:

mCombox. SetItemHeight (1, nHeight) adjust

add this statement to where ah, can say in detail?

CodePudding user response:

reference 1st floor zgl7903 response:

mCombox. SetItemHeight (1, nHeight) adjust

I'm calling the ReSize () function and then add the following code, but still doesn't work,

//Set the height of every item to be the 
//vertical size of the item 's text among. 
Cstrings STR. 
CSize sz. 
The CDC * pDC=((CComboBox *) GetDlgItem (IDC_COMBO_AC_MODE1)) - & gt; GetDC (); 
for (int i=0; I & lt; ((CComboBox *) GetDlgItem (IDC_COMBO_AC_MODE1)) - & gt; GetCount (); I++) 
{
((CComboBox *) GetDlgItem (IDC_COMBO_AC_MODE1)) - & gt; GetLBText (I, STR); 
Sz=pDC - & gt; GetTextExtent (STR); 

((CComboBox *) GetDlgItem (IDC_COMBO_AC_MODE1)) - & gt; SetItemHeight (I, sz. Cy); 
} 
((CComboBox *) GetDlgItem (IDC_COMBO_AC_MODE1)) - & gt; The ReleaseDC (pDC);

CodePudding user response:

Can you upload a picture, please?

CodePudding user response:

 
Void CDlg3Dlg: : ReSize (void) 
{
The SIZE Newp;//get the size of the dialog now 
CRect recta; 
GetClientRect (& amp; Recta);//in the client area size 
Newp. Cx=recta. Width (); 
Newp. Cy=recta. Height (); 

Cx/double fxZoom=(double) Newp. (double) old. Cx. 
Double fyZoom=(double) Newp. Cy/(double) old. Cy. 

HWND hwndChild=: : GetWindow (m_hWnd, GW_CHILD);//list all control 
While (hwndChild) 
{
CRect the Rect. 
: : GetWindowRect (hwndChild, & amp; The Rect); 
The ScreenToClient (& amp; The Rect); 

The Rect. Left=(int) (the Rect. Left * fxZoom + 0.5); 
The Rect. Right=(int) (the Rect. Right * fxZoom + 0.5); 
The Rect. Top=(int) (the Rect. Top * fyZoom + 0.5); 
The Rect. Bottom=(int) (the Rect. Bottom * fyZoom + 0.5); 

: : MoveWindow (hwndChild, the Rect. Left, the Rect. The top, the Rect. The Width (), the Rect. Height (), TRUE); 

//modify COMBOBOX height 
TCHAR szClass [64 + 1)={0}; 
If (GetClassName (hwndChild szClass, 64) 
& & _tcscmp (szClass, _T (" COMBOBOX "))==0) 
{
: : SendMessage (hwndChild CB_SETITEMHEIGHT, 1, the Rect. Height ()); 
} 

HwndChild=: : GetWindow (hwndChild GW_HWNDNEXT); 
} 
Old=Newp;//the SIZE old 
}

CodePudding user response:

The above _tcscmp change, _tcsicmp (szClass, _T (" COMBOBOX)"

CodePudding user response:

The building Lord I also encountered the same problem with you search online tried many ways did not solve your problem finally resolved yet? How to solve? Sharing methods qq272710437, grateful

CodePudding user response:

The solution? Help

CodePudding user response:

That can process CBN_DROPDOWN messages online looking for
//get the size of the ComboBox control, and then reset

CRect rc;
GetDlgItem (IDC_COMBO1) - & gt; GetClientRect (& amp; Rc);
M_ComBox. SetWindowPos (NULL, 0, 0, rc. The Width (), rc, Height () + 100, SWP_NOZORDER | SWP_NOMOVE | SWP_SHOWWINDOW);

Reference:
https://zhidao.baidu.com/question/540471281.html
http://blog.csdn.net/youyongyoumou/article/details/46363633

CodePudding user response:

Down list box using movewindow adjust the size, the size of the rect determines the size of the drop-down box

CodePudding user response:

references to the tenth floor xianglitian response:

down list box using movewindow adjust the size, the size of the rect determines the size of the drop-down box

This the rect which piece refers to?

CodePudding user response:

11 references Sweet__yy response:

Quote: reference to the tenth floor xianglitian response:

Down list box using movewindow adjust the size, the size of the rect determines the drop-down box the size of the

This the rect which piece refers to? nullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnull