Back to General and Gameplay Programming

Resize child window

General and Gameplay Programming Programming

Started by Decrius April 23, 2006 01:19 PM

30 comments, last by Decrius 17 years, 11 months ago

Decrius

100

Author

April 23, 2006 01:19 PM

Hi, I made a window, in the window I created 4 child windows:


HWND Create_Window_Child1(HWND hParent, char *Classname, int win_width, int win_height)
{
    return CreateWindowEx(
                 WS_EX_CLIENTEDGE, // give it a standard border
                 Classname,
                 NULL,
                 WS_VISIBLE | WS_CHILD,
                 1, 28, (((win_width-10)/2)-2), (((win_height-100)/2)-1),
                 hParent,
                 NULL, GetModuleHandle(0), NULL
               );
}
HWND Create_Window_Child2(HWND hParent, char *Classname, int win_width, int win_height)
{
    return CreateWindowEx(
                 WS_EX_CLIENTEDGE, // give it a standard border
                 Classname,
                 NULL,
                 WS_VISIBLE | WS_CHILD,
                 1, 28+(((win_height-100)/2)-1)+4, (((win_width-10)/2)-2), (((win_height-100)/2)-2),
                 hParent,
                 NULL, GetModuleHandle(0), NULL
               );
}
HWND Create_Window_Child3(HWND hParent, char *Classname, int win_width, int win_height)
{
    return CreateWindowEx(
                 WS_EX_CLIENTEDGE, // give it a standard border
                 Classname,
                 NULL,
                 WS_VISIBLE | WS_CHILD,
                 1+(((win_width-10)/2)-2)+4, 28, (((win_width-10)/2)-2), (((win_height-100)/2)-2),
                 hParent,
                 NULL, GetModuleHandle(0), NULL
               );
}
HWND Create_Window_Child4(HWND hParent, char *Classname, int win_width, int win_height)
{
    return CreateWindowEx(
                 WS_EX_CLIENTEDGE, // give it a standard border
                 Classname,
                 NULL,
                 WS_VISIBLE | WS_CHILD,
                 1+(((win_width-10)/2)-2)+4, 28+(((win_height-100)/2)-1)+4, (((win_width-10)/2)-2), (((win_height-100)/2)-2),
                 hParent,
                 NULL, GetModuleHandle(0), NULL
               );
}

win_width and win_height are the sizes of the window (512x512). When I resize the window, I want that the 4 child windows will resize too, and not stay the same, but contract or expand. So I need to do something with the


case WM_SIZE:
{
return 0;
}

function. Should I use SendMessage( or MoveWindow( ? And how to use them, noone of them worked yet. I tried them all... Any suggestion is very appreciated :) Decrius

[size="2"]SignatureShuffle: [size="2"]Random signature images on fora

Evil Steve

2,021

April 23, 2006 01:22 PM

SetWindowPos() is probably what you want.
Example:
SetWindowPos(hChild, hParent, x, y, width, height, 0);

Decrius

100

Author

April 23, 2006 01:28 PM

Thank you for the reply.

So it should be:

SetWindowPos(hChild1, hWnd, 1, 28, (((LOWORD(lParam)-10)/2)-2), (((HIWORD(lParam)-100)/2)-1), 0);

But thats not working, the child isn't sizing at all. What's wrong?

Decrius

[size="2"]SignatureShuffle: [size="2"]Random signature images on fora

Evil Steve

2,021

April 23, 2006 01:34 PM

Does it work if you call that outside your WM_SIZE handler? It works fine for me... Does SetWindowPos() return any error?

Decrius

100

Author

April 23, 2006 01:39 PM

Well, when the program starts, the first Child (which I try to resize) has a different size on start up, but when I resize the window, nothing happens. How can I check if the function gives an error?

Thank you anyways, :)

Decrius

PS: or do I have to redraw the window?

[size="2"]SignatureShuffle: [size="2"]Random signature images on fora

Evil Steve

2,021

April 23, 2006 01:43 PM

Quote:Return Values
Nonzero indicates success. Zero indicates failure. To get extended error information, call GetLastError.

The only reason I can think that the function would fail is if your window handles are invalid, however.

EDIT: You shouldn't have to redraw the window, Windows will do that for you.

Decrius

100

Author

April 23, 2006 01:54 PM

I got some progress, the second parameter shouldn't be 'hWnd', but something like 'HWND_BOTTOM', 'HWND_NOTTOPMOST', 'HWND_TOP' or 'HWND_TOPMOST'. For nottopmost and topmost I see no difference. But for the bottom and top things, I see nothing until I resize the window, I see them flickering, flashing (whatever :p). The flashing border of the child grows if the window expands. But when I stop resizing the flashing is gone. Its like the child window is under the surface, but I don't see how to fix it...

Thanks so far anyways :)

Decrius

[size="2"]SignatureShuffle: [size="2"]Random signature images on fora

Erik Rufelt

5,903

April 23, 2006 02:00 PM

First try to resize the window to a fixed size, perhaps you have a negative width or something.. I don't know what happens if you do.

Here's how you can check for errors:
You might need to #include <stdio.h> for sprintf

BOOL bRet;bRet = SetWindowPos(	hChildWnd,	NULL,	0,	0,	500,	500,	SWP_NOZORDER);if(bRet == 0) {	DWORD dwErr = GetLastError();	char str[255];		sprintf(str, "Error %d", dwErr);	MessageBox(NULL, str, "Message", MB_OK);}

Evil Steve

2,021

April 23, 2006 02:03 PM

Quote:Original post by Decrius
I got some progress, the second parameter shouldn't be 'hWnd', but something like 'HWND_BOTTOM', 'HWND_NOTTOPMOST', 'HWND_TOP' or 'HWND_TOPMOST'. For nottopmost and topmost I see no difference. But for the bottom and top things, I see nothing until I resize the window, I see them flickering, flashing (whatever :p). The flashing border of the child grows if the window expands. But when I stop resizing the flashing is gone. Its like the child window is under the surface, but I don't see how to fix it...

No necessarily [wink]

Quote:hWndInsertAfter
[in] Handle to the window to precede the positioned window in the z-order. This parameter must be a window handle or one of the following values.

(Emphasis mine). Try what Erik Rufelt suggested, and see if that helps.

Decrius

100

Author

April 23, 2006 02:07 PM

Thank you :)

I put it in the program, when I start up the program, I get one message box with:

Error: 1400

But when I resize the window I get nothing.

How to find out what error 1400 means?

Decrius

[size="2"]SignatureShuffle: [size="2"]Random signature images on fora

Resize child window

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

Resize child window

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

Reticulating splines