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

Re: Deleting selected items from list control

19-Feb-07 20:48

Hi,

Right now i am able to delete single selected row from the listcontrol. Can you please tell me how to delete all those selected rows if i select more than one row from list control.(selection of rows can be done either by mouse click along with "Ctrl" button on keyboard or with the help of arrow buttons on keyboard along with Shift button)

Harsha

Hamid_RT19-Feb-07 20:56