C / C++ / MFC

How to get KeyPessed event from an editbox

27-Sep-06 3:10

lol, nevermind... i misunderstood your post Wink | ;)

TOXCCT >>> GEII power

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gunner_uk200026-Sep-06 22:55

gunner_uk2000

26-Sep-06 22:55

Here is my event handling code:

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, <br />
						 WPARAM wParam, LPARAM lParam)<br />
{<br />
	switch(msg)<br />
	{<br />
	case WM_CREATE:<br />
		Init();<br />
	case WM_PAINT:<br />
		PaintScreen();<br />
		break;<br />
	case WM_CLOSE :<br />
		DestroyWindow(hwnd);<br />
		break;<br />
	case WM_KEYDOWN:<br />
		if(wParam == 13){<br />
			ProcessCommand();<br />
		}<br />
	case WM_COMMAND :<br />
		if(LOWORD(wParam) == ID_COMMAND)<br />
			ProcessCommand();<br />
		break;<br />
	case WM_DESTROY :<br />
		PostQuitMessage(0);<br />
		break;<br />
<br />
<br />
	}<br />
<br />
	return DefWindowProc(hwnd, msg, wParam, lParam);<br />
}

This only works if the main window has the focus, so how can i check which key was pressed if the editbox (ID_EDITBOX) has the focus.

Ie so that if the user presses enter i can run the proccessing needed on it.

Re: How to get KeyPessed event from an editbox

Rinu_Raj26-Sep-06 23:01

Re: How to get KeyPessed event from an editbox

26-Sep-06 23:01

Map the EN_CHANGE notification

Rinu Raj

gunner_uk200026-Sep-06 23:19

gunner_uk2000

26-Sep-06 23:19

How would i go about using the EN_CHANGE notifcation?

As checking for it in the switch case does not work as the code is not executed when i key is pressed.

<br />
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, <br />
						 WPARAM wParam, LPARAM lParam)<br />
{<br />
	switch(msg)<br />
	{<br />
	case WM_CREATE:<br />
		Init();<br />
	case WM_PAINT:<br />
		PaintScreen();<br />
		break;<br />
	case WM_CLOSE :<br />
		DestroyWindow(hwnd);<br />
		break;<br />
	case WM_KEYDOWN:<br />
		if(wParam == 13){<br />
			ProcessCommand();<br />
		}<br />
		break;<br />
	case EN_CHANGE:<br />
		if(wParam == 13){<br />
			ProcessCommand();<br />
		}<br />
		break;<br />
	case WM_COMMAND :<br />
		if(LOWORD(wParam) == ID_COMMAND)<br />
			ProcessCommand();<br />
		break;<br />
	case WM_DESTROY :<br />
		PostQuitMessage(0);<br />
		break;<br />
<br />
<br />
	}<br />
<br />
	return DefWindowProc(hwnd, msg, wParam, lParam);<br />
}

Re: How to get KeyPessed event from an editbox

Rinu_Raj26-Sep-06 23:34

How to exit from aplication ?

26-Sep-06 23:34

case WM_COMMAND :
if(LOWORD(wParam) == EN_CHANGE)

check MSDN for details

Rinu Raj

Bravoone_200626-Sep-06 22:39

Bravoone_2006

26-Sep-06 22:39

you know how to exit from aplication ?

i need something like :
PostQuitMessage(125);

Smile | :)

Bravoone

toxcct26-Sep-06 22:50

26-Sep-06 22:50

what kind of application ? Console ? Win32, MFC ? .NET ?

TOXCCT >>> GEII power

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Rinu_Raj26-Sep-06 22:50

26-Sep-06 22:50

whats happening ?
is that one not wuiting ?

Rinu Raj

Rajesh R Subramanian26-Sep-06 22:53

Rajesh R Subramanian

26-Sep-06 22:53

#include <stdlib.h>

...

exit(0);

Nobody can give you wiser advice than yourself. - Cicero

toxcct26-Sep-06 22:58

26-Sep-06 22:58

in console, yes, but there are better ways otherwise. that's why i'm waiting for his answer...

TOXCCT >>> GEII power

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Rajesh R Subramanian26-Sep-06 23:02

Rajesh R Subramanian

26-Sep-06 23:02

Yes, you're right. Since he is not specific about the question, I gave a more generic answer, which is applicable into MFC/Console Big Grin | :-D

Nobody can give you wiser advice than yourself. - Cicero

Bravoone_200626-Sep-06 23:20

Bravoone_2006

26-Sep-06 23:20

yes mfc
and thanks all !

Bravoone

toxcct26-Sep-06 23:21

26-Sep-06 23:21

Bravoone_2006 wrote:
yes mfc

then Call CDialog::EndDialog(IDOK) (or IDCANCEL)

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Image reading and writing + B-SPline models

Hamid_RT26-Sep-06 23:45

Hamid_RT

26-Sep-06 23:45

Or SendMessage(WM_CLOSE);

WhiteSky

Raspoteen26-Sep-06 22:29

Raspoteen

26-Sep-06 22:29

Hi,

I need to know if there is C or C++ code for reading and writing any image format and another source code for creating B-SPLine surface.

Thank you

Re: Image reading and writing + B-SPline models

Ștefan-Mihai MOGA26-Sep-06 22:47

Ștefan-Mihai MOGA

26-Sep-06 22:47

Either you use Chris Maunder's DIBSection wrapper[^] or Davide Pizzolato's CxImage[^] (CxImage is a C++ class to load, save, display, transform BMP, JPEG, GIF, PNG, TIFF, MNG, ICO, PCX, TGA, WMF, WBMP, JBG, J2K images), but I don't know anything for creating B-SPLine surface. Good luck!

Re: Image reading and writing + B-SPline models

Hamid_RT27-Sep-06 8:40

Hamid_RT

27-Sep-06 8:40

Also you can use CImage class for load/save bmp,jpeg,gif,tiff Smile | :)

WhiteSky

how to send a struct

hanlei000000000926-Sep-06 22:15

hanlei0000000009

26-Sep-06 22:15

send function only send char*, how to send a struct.
thanks!

Waldermort26-Sep-06 22:21

Waldermort

26-Sep-06 22:21

you need to write each member to a char buffer, then send that

Rinu_Raj26-Sep-06 22:24

26-Sep-06 22:24

Can you please explain what you really need ?

Rinu Raj

toxcct26-Sep-06 22:52

26-Sep-06 22:52

a struct, is finally an array of bytes. and a char* is also such a thing. the only thing to tell to send is how much bytes (chars) it will have to send, with sizeof(YourStruct).

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Niklas L27-Sep-06 1:07

Niklas L

27-Sep-06 1:07

...that is after he takes care of byte order issues on each member.

net