CreateDialogParam - Parent Window

[JC1]

I'm working on a graphical interface for a program, and I'm having some problems with a window, hFunc, created with the CreateDialogParam function.

Let me explain the context:
I have a main window, it is hMainDlg. Then I have a listview control on the left side, hList, whose parent window is hMainDlg. Then I have one more window, hFunc, located on the right of the list view and whose parent window is hMainDlg. hList and hFunc are to be located inside hMainDlg.
I handle the WM_SIZE message in the hMainDlg proc to make those two windows fit peacefuly inside hMainDlg client space:

Code Select Expand

.elseif uMsg==WM_SIZE ;LOWORD(lParam)=width HIWORD(lParam)=height
.if (hList!=0 && hFunc!=0)
mov eax, lParam
mov cxClientSize, ax
shr eax, 16
mov cyClientSize,ax
invoke MoveWindow, hList, 0, 0, 250, cyClientSize, TRUE               ;move hList position

movzx ebx, cxClientSize
sub bx, 253
invoke MoveWindow, hFunc, 253, 0,ebx, cyClientSize,TRUE            ;move hFunc position
.endif

Everything works fine with the list view control. But the hFunc window isn't moved properly.
It seems that hFunc isn't moved relatively to the upper-left corner of his parent window. The x position is always constant (try double cliking the caption bar or moving the window), and in the y axis hFunc painting begins at the top of the screen, not below the caption bar of hMainDlg.
I've checked in the debugger and CreateDialogParam receives a valid parent HWND and doesn't return any error.  :'(

At WM_CREATE I have:

Code Select Expand

.elseif uMsg==WM_CREATE
invoke CreateListView, hdlg

    invoke CreateDialogParam, hInstance, SADD("FuncDialog"), hdlg, addr FuncProc, NULL ;hdlg is the HWND passed to the window proc
mov hFunc, eax

You can check this strange behaviour and the remaining code in the file attached. I hope someone can give me some help. I don't know how to fix this.

[attachment deleted by admin]

[Shantanu Gadgil]

Try the ScreenToClient API.  :bg :bg

Regards,
Shantanu

[japheth]

the problem is that CreateDialogParam usually doesn't create a child window but an "owned" popup/overlapped window. While for a child window screen coordinates are usually given related to the parent window's client coordinates, this is not so in the case of "owned" popup windows.

The solution most likely is: make CreateDialogParam create a child window (IIRC this is done in the STYLE parameter)

[JC1]

Yes, it can be easily done with ScreenToClient, but in the Win32 documentation, it says that the coordinates used with MoveWindow function are relative to the upper-left corner of the parent window if the HWND passed to the function is from a child window. So, I don't think I have to do something that the WinAPI is supposed to do for me.

japheth, In the resource file I've done:

FuncDialog DIALOGEX 6,6,200,39
STYLE 0xD0000000+WS_CHILD+WS_POPUP
BEGIN

and the behaviour is exactly the same. Am I missing something? Any ideas?

[japheth]

> STYLE 0xD0000000+WS_CHILD+WS_POPUP

WS_CHILD and WS_POPUP should not be declared both (I dont know for sure, but they may even be mutually exclusive). And IIRC you must also define DS_CONTROL:

> STYLE 0xD0000000+WS_CHILD+DS_CONTROL

although I have forgotten why.

[JC1]

STYLE WS_VISIBLE+WS_CHILD+DS_CONTROL

Now it works. Thanks for your help