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Mistrel
Joined: 12 Sep 2005
Posts: 188
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 Posted: Sun Sep 16, 2007 3:51 am Post subject: How to prevent the parent window from losing focus? |
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When I set a window as a child of another using SetParent how can I prevent a loss of focus of the parent window (the title bar greying out) when I select the child inside?
Is there some way to group all of these windows into a single focus? |
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Lexikos
Joined: 17 Oct 2006
Posts: 2558
Location: Australia, Qld
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| Posted: Sun Sep 16, 2007 6:37 am Post subject: |
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| Quote: | | Is there some way to group all of these windows into a single focus? |
That's the default behaviour for child windows & their parent.
You most likely need to set +WS_CHILD -WS_POPUP for the child window. For instance: | Code: | Gui, 1:+LastFound
hwnd1 := WinExist()
Gui, 2:+LastFound
Gui, 2:+0x40000000 -0x80000000 ; Add WS_CHILD, remove WS_POPUP
hwnd2 := WinExist()
DllCall("SetParent", "uint", hwnd2, "uint", hwnd1)
Gui, 2:Show, x0 y0 w200 h200, GUI 2
Gui, 1:Show, w400 h400, GUI 1
return
GuiClose:
ExitApp |
If you uncomment the Gui, 2:+0x4... line, GUI 2 is set as the foreground window whenever you try to focus GUI 1. Pressing Alt+F4 closes GUI 2 (or does nothing if it's already closed), and pressing GUI 1's close button doesn't work.
After adding WS_CHILD and removing WS_POPUP, AHK Window Info shows that GUI 1 is the foreground/active window, and GUI 2 is the focused control.
| MSDN wrote: | | For compatibility reasons, SetParent does not modify the WS_CHILD or WS_POPUP window styles of the window whose parent is being changed. Therefore, if hWndNewParent is NULL, you should also clear the WS_CHILD bit and set the WS_POPUP style after calling SetParent. Conversely, if hWndNewParent is not NULL and the window was previously a child of the desktop, you should clear the WS_POPUP style and set the WS_CHILD style before calling SetParent. |
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Mistrel
Joined: 12 Sep 2005
Posts: 188
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| Posted: Sun Sep 16, 2007 11:20 pm Post subject: |
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Thank you! I've been trying to get this to work forever.  |
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SKAN
Joined: 26 Dec 2005
Posts: 5890
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| Posted: Mon Sep 17, 2007 8:31 am Post subject: |
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| lexikos wrote: | | You most likely need to set +WS_CHILD -WS_POPUP for the child window. |
Thanks for this useful info.  |
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Mistrel
Joined: 12 Sep 2005
Posts: 188
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| Posted: Mon Sep 17, 2007 5:31 pm Post subject: |
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| With this I can actually embed one program into another seamlessly by parenting it to a child window or an MDI window and setting these flags to prevent loss of focus from the main application. |
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Lexikos
Joined: 17 Oct 2006
Posts: 2558
Location: Australia, Qld
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| Posted: Fri Nov 30, 2007 1:17 pm Post subject: |
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It just occurred to me that since the hWndParent parameter of CreateWindowEx (the function used to create a window) is either the parent window or owner window (depending on whether you specify the WS_CHILD style), we don't even need SetParent when dealing with our own GUIs:
| Code: | Gui, 1:+LastFound ; ensure GUI 1 exists before creating GUI 2
Gui, 2:+0x40000000 -0x80000000 +Owner1 ; Add WS_CHILD, remove WS_POPUP, set owner/parent
Gui, 2:Show, x0 y0 w200 h200, GUI 2
Gui, 1:Show, w400 h400, GUI 1
return
GuiClose:
ExitApp |
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