C / C++ / MFC

19-Feb-07 21:59

Hello all,

I have a Rich edit control in my win 32 App.

I am passing one word to rich edit control and I want to change the color of that word in all the places where it occurs in the Rich control.

I am trying with this code

void ColorWords(char* word,HWND hwnd)<br />
{<br />
	CHARFORMAT2 cf;<br />
	memset(&cf, 0, sizeof(CHARFORMAT2));<br />
	cf.cbSize = sizeof(CHARFORMAT2);<br />
	cf.dwMask = CFM_BOLD;<br />
	cf.dwEffects = CFE_BOLD;<br />
	COLORREF clr =RGB(255, 10, 15) ;<br />
	cf.dwMask =CFM_COLOR;<br />
    	cf.crTextColor = clr;<br />
<br />
<br />
     FINDTEXTEX findText;<br />
     int foundCount = 0;<br />
     int foundPos = 0;<br />
     int wordLen = lstrlen(word);<br />
 <br />
	 findText.chrg.cpMin = 0;<br />
	 findText.chrg.cpMax = -1;<br />
	 findText.lpstrText = word;<br />
<br />
	//Handle to the Rich edit box<br />
    HWND hwndRichEdit = GetDlgItem(hwnd, IDC_FILECONT);<br />
 foundPos=SendMessage(hwndRichEdit,EM_FINDTEXT,FR_WHOLEWORD,(LPARAM)&findText);<br />
<br />
   while (foundPos != -1)<br />
   {<br />
	SendMessage(hwndRichEdit,EM_EXSETSEL,0,(LPARAM)foundPos + wordLen);<br />
        SendMessage(hwndRichEdit,EM_GETCHARFORMAT,SCF_SELECTION,(LPARAM)cf);<br />
	findText.chrg.cpMin = foundPos + wordLen;		<br />
foundPos =SendMessage(hwndRichEdit,EM_FINDTEXT,FR_WHOLEWORD,(LPARAM)&findText);<br />
   }<br />
}

I am getting the below error can u please tell me what is error ??

Error :-

error C2440: 'type cast' : cannot convert from 'struct CHARFORMAT2A' to 'long'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
Error executing cl.exe.

Suresh H19-Feb-07 22:26

19-Feb-07 22:26

Hi Prasad,

Thanks for the response. I did that changes and its working.

Now no compile time errors,and also I am not getting any out put . I just traced the code using debug .

Till this line no error while (foundPos != -1)

after this statement I am getting

unhanded exception in a.exe (RICHED20.DLL):0XC000005 : Access violation

can u please tell me what is the error ?? is there any problem with send messages ??

Suresh H19-Feb-07 22:54

19-Feb-07 22:54

Hi Prasad,

I made the changes

<br />
while (foundPos != -1)<br />
{<br />
CHARRANGE chrRange;<br />
chrRange.cpMin = foundPos-1;<br />
chrRange.cpMax = chrRange.cpMin + wordLen;<br />
SendMessage(hwndRichEdit,EM_EXSETSEL,0,(LPARAM)(&chrRange));<br />
SendMessage(hwndRichEdit,EM_GETCHARFORMAT,SCF_SELECTION,(LPARAM)(&cf));<br />
findText.chrg.cpMin = foundPos + wordLen;		<br />
foundPos=SendMessage(hwndRichEdit,EM_FINDTEXT,FR_WHOLEWORD,(LPARAM)&findText);<br />
}<br />

Now i am not getting any debug error or the words are getting colored ??
word color is not getting updated why ?? is there any error in this format statment ??

SendMessage(hwndRichEdit,EM_GETCHARFORMAT,SCF_SELECTION,(LPARAM)(&cf));

Suresh H19-Feb-07 23:34

19-Feb-07 23:34

Ho at last ……its working … thanks prasad ……now words are getting colored …

To the color function I am passing the word like if I am passing the word Africa only that particular word will be highlighted. And in the dialog I have one more option like we can give fuzziness ranging from 1 to 5 if we give fuzziness as 1 and search word as Africa , it should high light the words like Africa1 African 0Africa etc and so on …

I want to know is there any possibilities of doing this ???? if yes then which send methods I have use ???

Hamid_RT19-Feb-07 23:08

19-Feb-07 23:08

I think you get your answer but moreover see A Rich Edit Control That Displays Bitmaps and Other OLE Objects[^] its good article about RichEdit Wink | ;)

WhiteSky

Suresh H19-Feb-07 23:38

Capturing "Delete button down" from keyboard

19-Feb-07 23:38

Thanks white sky for the link ….
But its MFC rich edit box application …. I think there is a lot of changes in the MFC and Win 32 way of handling structure and send messages.

If u have any link for win 32 Api Application examples for rich edit box please send it, it will be very use full for me.

harsh_296119-Feb-07 20:52

19-Feb-07 20:52

Hi,

Can you please tell me how to capture keyboard button down . i want especially for delete button.

This is required for me because i should be able to delete selected item by pressing "Delete" or(And) "Del" button of keyboard.

Harsha

Hamid_RT19-Feb-07 20:57

19-Feb-07 20:57

Can you use of WM_KEYDOWN/WM_KEYUP

WhiteSky

bosfan19-Feb-07 22:00

19-Feb-07 22:00

Hello,
can be "PretranslateMessage(MSG* pMsg)" solution for this question?
Something like this:

BOOL CMyDialog::PreTranslateMessage(MSG* pMsg)
{
   if(pMsg->message == WM_KEYDOWN)
   {
      if(pMsg->wParam == VK_DELETE)
      {
         // do something, delete?
      }
   }
   return CDialog::PreTranslateMessage(pMsg);
}

regards
break;

Hamid_RT19-Feb-07 23:08

19-Feb-07 23:08

Your answer is Yes;),but you must know one thing about WM_KEY*.if you have a control on your forum then you dont get any WM_KEY* because focus send to it control.Test this sibject with a dialog that first it has controls on itself again it doesnt have any control and see retuslt.

WhiteSky

bosfan20-Feb-07 0:23

20-Feb-07 0:23

ok,

what is the right way to do this?

do you know some example for this?

tanks
break;

bosfan20-Feb-07 0:27

20-Feb-07 0:27

I found this function here:
ON_WM_KEYDOWN()
to use with:
OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
is that maybe te current way to catch key input?

harsh_296120-Feb-07 0:55

20-Feb-07 0:55

Hi,
i used the below function on WM_KEYDOWN() message, but donno why it is not working.
It is not even detecting if i press any key. i dont know if ishould add something else.
Note:in the function "dummy" i have a messagebox to see if its working.

void CKeyboard1Dlg::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
//char lsChar;
//lsChar=char(nChar);
switch(nChar)
{
case VK_DELETE:
dummy();
break;
default:
CString d1;
d1="ur code not worki";
MessageBox(d1);

}

CDialog::OnKeyDown(nChar, nRepCnt, nFlags);
}
and function prototype i used is in ".h"file is
"afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);"

Harsha

bosfan20-Feb-07 1:05

20-Feb-07 1:05

Hi,
have you add
ON_WM_KEYDOWN()
to your message map! Roll eyes | :rolleyes:

break;

harsh_296120-Feb-07 18:57

20-Feb-07 18:57

Ya .. i have added on_wm_keydown().. its not worki even then.

Harsha

Hamid_RT20-Feb-07 1:12

20-Feb-07 1:12

Do you have any controls on the forum?

WhiteSky

harsh_296120-Feb-07 22:32

Deleting selected items from list control

20-Feb-07 22:32

this code is working.. thanks a lot Smile | :)

Harsha

harsh_296119-Feb-07 20:48