I want to be able to display formatted text inside a message box (like bold text, bullet points, italics, etc.).
I came across this wonderful article but can't seem to get it to work. I am using the demo application at that same link.
Can someone please help me out? I have tried debugging/understanding that code in vain.
Constraints: (not my choice)
Has to be compatible with Windows XP.
I'm using Visual C++ 6.
How it is supposed to display:
How it actually displays:
Simply create a dialog bow with a RichEdit2 control...
In InitInstance, add the follwing call:
// Init RichEdit Library
AfxInitRichEdit2();
In your dialog box, create a variable to the RichEdit control and update it as:
// Turn Word Wrap on (based on window width)
m_RichEditMsg.SetTargetDevice( NULL, 0);
// Set Base Text
strText = "{\\rtf1\\ansi\\fs20 ";
strText += "{\\colortbl;\\red0\\green0\\blue0;\\red0\\green0\\blue255;\\red0\\green255\\blue255;\\red0\\green255\\blue0;\\red255\\green0\\blue0;}";
strText += "{\\f1\\cb1\\cf2\\b Main Title} \\par\\par \\fs18 Other text to add {\\b In Bold} no more in bolb ... \\par";
str.Format( "\\par Id: {\\b %s}", m_strProgId);
strText += str;
strText+= "\\par \\par {\\f1 \\b Please Confirm ...} \\par}";
// Update Controls
m_RichEditMsg.SetWindowText( strText);
Simply build your own message and you get bold, color, ...
I have solved this problem thanks to the very helpful suggestions of DavidK (see comments on the question). The FIX for Windows 2000 comment fixed this neatly.
Related
I am building a textEdit application with MFC. Is there a way to create a hyperlink automatically when a user write web address? It's like when you write a web address "www.google.com" the application detects web address and create a hyperlink right away. I have searched documents that explains about this, but couldn't find it..
and i couldn't make it..
i already have made notepad but i couldn't add the function of hyperlink on the notepad.
the following sentences are functions of hyperlink.
Clicking the text needs to open a browser window to the location specified by the text.
The cursor needs to change from the standard arrow cursor to a pointing index finger when it moves over the control.
The text in the control needs to be underlined when the cursor moves over the control.
A hyperlink control needs to display text in a different color—black just won't do.
The features that I added are:
5.A hyperlink control once visited needs to change color.
6.The hyperlink control should be accessible from the keyboard.
7.It should install some kind of hooks to allow the programmer to perform some actions when the control has the focus or when the cursor is hovering over the control.
Among the functions, What I mostly want to complete is the first one.
If I click a Hyperlink text, it should be linked to a browser window on the Internet.
Please answer and help me. Thanks.
Just use a CRichEditCtrl control (remember to call AfxInitRichEdit2 in your InitInstance). Call SetAutoURLDetect. Done.
Unfortunately this is not enough to make it work. It will display text that resembles URL as blue underlined but it will not invoke the link.
This will have to be handled by additional code. This will set needed event mask:
long lMask = m_RichEditCtrl.GetEventMask();
m_RichEditCtrl.SetEventMask(lMask | ENM_LINK);
m_RichEditCtrl.SetAutoURLDetect();
Also reflected EN_LINK will has to be handled to follow the link. For example:
void CHyperLinkInEditView::OnEnLink(NMHDR *pNMHDR, LRESULT *pResult)
{
ENLINK *p_Link = reinterpret_cast<ENLINK *>(pNMHDR);
if(p_Link && p_Link->msg == WM_LBUTTONDOWN)
{
//int iRange = m_RichEditCtrl.GetTextRange(p_enLinkInfo->chrg.cpMin, p_enLinkInfo->chrg.cpMax);
m_RichEditCtrl.SetSel(p_Link->chrg);
CString szLinkString = m_RichEditCtrl.GetSelText ();
ShellExecute(m_hWnd, L"Open", szLinkString, NULL, NULL, SW_MAXIMIZE);
}
*pResult = 0;
}
All of the above will solve requirement 1, 2, 3 (partially –text is underlined always), and 4.
I do not quite understand 5, 6 and 7.
Could you elaborate?
I added a read-only rich edit 2.0 control to my dialog (code is using C windows API, the dialog is created by using function DialogBox)
At the dialog call back, at the WM_INITDIALOG, I add the following code to enable url detection and also enable the event ENM_LINK is sent to the parent dialog instead of the rich edit control itself:
LRESULT mask = SendMessage(hWndText, EM_GETEVENTMASK, 0, 0); //hWndText is rich edit control
SendMessage(hWndText, EM_SETEVENTMASK, 0, mask | ENM_LINK);
::SendMessage(hWndText, EM_AUTOURLDETECT, TRUE, NULL);
I had a little trouble to enable the url detection when dialog is initially launched (which seems a known issue or behavior since rich edit control would only enable url detection of modified text). However I worked around this issue by setting the dialog text again on every WM_PAINT event.
The code is generally working. I also implemented the following code to launch the URL at the browser when mouse is hovering over the url:
case WM_NOTIFY:
plink = (ENLINK *) lParam;
switch(LOWORD(wParam))
{
case IDC_DISPLAY_TEXT_2: //this is ID for my rich edit control
szURL =m_strDisplay.Mid(plink->chrg.cpMin, plink->chrg.cpMax - plink->chrg.cpMin);
LaunchURL(szURL); //function to launch the url with default browser
break;
default:
break;
}
It seems that I would get WM_NOTIFY event every time when I hovered the mouse over the url. However when I clicked on it, I always get same event as the mouse hover over.
Based on the structure of ENLINK, I should get more detailed NM event at the NMHDR structure, however the value plink->nmhdr.code is always 1803 which is not even NM_HOVER (its defined value is (NM_FIRST-13) and NM_FIRST is (0U- 0U), so NM_HOVER value is 4294967283 on my 64 bit machine). I know that I am missing something here. Could someone shed some lights here? How can I get the mouse click event for the rich edit control?
I think you should capture the EN_LINK notification. I implemented the following code. It enables a url link in a richedit control placed into the parent window, not into a dialog. You could adapt it for your dialog, as well.
Consider beginning with the code:
case WM_NOTIFY: {
switch (((LPNMHDR)lParam)->code) { //NMHDR structure contains information about a notification message.
case EN_LINK: {
ENLINK *enLinkInfo = (ENLINK *)lParam; // pointer to a ENLINK structure
then, if you choose to launch url on LBUTTONUP, you have to check the value contained in enLinkInfo->msg (remember to adapt it for your dialog, though)
if (enLinkInfo->msg == WM_LBUTTONUP) {
// select all the text from enLinkInfo->chrg.cpMin to enLinkInfo->chrg.cpMax
// lauch the url
}
Besides, you can intercept WM_MOUSEMOVE:
if(enLinkInfo->msg == WM_MOUSEMOVE) {
; // do nothing
}
Hope it helps.
As the answer by #A_nto2 shows, to intercept a mouse click do:
case WM_NOTIFY: {
//NMHDR structure contains information about a notification message.
switch (((LPNMHDR)lParam)->code) {
case EN_LINK: {
ENLINK *enLinkInfo = (ENLINK *)lParam; // pointer to a ENLINK structure
if (enLinkInfo->msg == WM_LBUTTONUP) {
But the tricky part is to get the link that was clicked on.
One gets a "range" that was clicked on in the enLinkInfo->chrg of the type CHARRANGE.
An answer to Detect click on URL in RichEdit suggests using the EM_EXSETSEL with the enLinkInfo->chrg. And then using the EM_GETSELTEXT to retrieve the text.
That works with auto-detected plain-text URLs (EM_AUTOURLDETECT).
A problem is with friendly name hyperlinks (i.e. those that have an anchor text different than the URL itself):
{\rtf1{\field{\*\fldinst{ HYPERLINK "https://www.example.com"}}{\fldrslt{Example}}}}
(Note that these are supported in Rich Edit 4.1 and newer only)
For these, the CHARRANGE points to the HYPERLINK "https://www.example.com" part, which is hidden and cannot be selected using the EM_EXSETSEL. Actually it can be selected on Windows 10. But it cannot be selected on Windows 7, Vista and XP. Sending the EM_EXSETSEL to these systems results in selecting a zero-length block just after the hidden part.
So either you have to go back in the rich edit buffer and scan for the link; or use another method to retrieve the clicked text.
In my case, as I have small texts only in the rich edit, I've used the WM_GETTEXT. It returns a plain-text version of the rich edit document, but with the friendly name hyperlinks preserved in this form:
HYPERLINK "https://www.example.com" Example
The CHARRANGE points to the URL, strangely including the leading quote: ("https://www.example.com).
But the indexes correspond to a text with a single-character (LF) line separators. While the WM_GETTEXT returns the CRLF separators. So you have to convert the text to the LF before extracting the URL using the CHARRANGE.
According to the documentation of EM_AUTOURLDETECT, you are supposed to get an EN_LINK notification, which should be reflected in the nmhdr.code. According to Google,
#define EN_LINK 0x70B
which is 7 * 256 + 11 = 1750 + 42 + 11 = 1803.
Please note that your code misses a check for nmhdr.code == EN_LINK.
I'm not sure if the control sends NM_HOVER messages at all.
This seems trivial, but with MFC I always end up with some stupid trivial problem that puts a stop to my workflow.
I am getting a "Debug Assertion Failed" error pointing to afxcmn2.inl line 352:
_AFXCMN_INLINE int CComboBoxEx::AddString(LPCTSTR lpszString)
{ UNUSED_ALWAYS(lpszString); ASSERT(FALSE); return CB_ERR;}
I am attempting to just add some strings to a combo box on initialization like so:
BOOL myDialog::OnInitDialog()
{
CDHtmlDialog::OnInitDialog();
cb_direction.AddString(CString("North"));
}
Most of the answers on Google seem to suggest that the AddString is happening before OnInitDialog, which doesn't seem to be the case here. Another series of answers on Google suggests the data exchange isn't happening or it's wrong, but it's not:
void myDialog::DoDataExchange(CDataExchange* pDX)
{
CDHtmlDialog::DoDataExchange(pDX);
DDX_Control(pDX, IDC_WHEDIT_DIR, cb_direction);
}
Another suggestion was that the combo box hasn't been created yet, but if I disable the combobox using the following code, not only do I NOT get an error, but it actually works and disables the box!
BOOL myDialog::OnInitDialog()
{
CDHtmlDialog::OnInitDialog();
cb_direction.EnableWindow(FALSE);
}
I've cleaned the solution and rebuilt it. I'm not sure what else I am missing. And all I want to do is to add a string to a combo box, which would take 2 seconds in .Net (this program that was written years ago by someone else which is why it's in MFC rather than .Net, but I digress).
Entering the game a little late but, who knows, this might help someone someday:
COMBOBOXEXITEM item;
ZeroMemory(&item, sizeof(item));
item.mask = CBEIF_TEXT;
item.iItem = 0;
item.pszText = _T("Hello");
m_ComboEx.InsertItem(&item);
FWIW, AddString() functionality is removed from CComboEx because the purpose of the control is to display advanced items (with images, identation, whatever...), not straight regular text items.
Well if you look at what the method is doing they have an ASSERT(FALSE) in there, so no wonder. It doesn't actually do anything that would indicate it adds an item to the ComboBoxEx control. Per the docs
This function is not supported by the Windows ComboBoxEx control. For more information on this control, see ComboBoxEx Controls in the Platform SDK.
The documentation is your friend :)
Please do not mark it as a dupe of this question just yet:
Bold labels in MFC
That question does not help me; for some reason I do not see the rich edit control. Instead I believe I have to do it in code. here is a sample I found:
http://www.tech-archive.net/Archive/VC/microsoft.public.vc.mfc/2006-10/msg00245.html
My problem is that I prefer not to re-invent the wheel and test for errors myself or through QA.
Someone must have implemented this before. Please share your code.
What I would like to do is:
Keep the same font size, family, etc. as in the already created label, but make it bold and italic as well.
Keep the memory footprint reasonably low (do not create any new unnecessary objects), but do not get the app into an inconsistent state either.
I appreciate your help.
You will want to do the following before the static text control is shown on the parent window.
Get a handle to the window: CWnd * pwnd = GetDlgItem(IDC_LABEL);
Get the current font for the static text: CFont * pfont = pwnd->GetFont();
Get the characteristics of the font: LOGFONT lf; pfont->GetLogFont(&lf);
Change the lfWeight and lfItalic fields in lf.
Put a CFont object in your parent window, so it will exist for the entire lifetime of the child window.
Initialize the CFont: m_font.CreateFontIndirect(&lf);
Set the font into the static text window: pwnd->SetFont(&m_font);
When we have a RichEdit control and send it an EM_AUTOURLDETECT message with WPARAM set to TRUE, it nicely hightlights the detected URLs and sends the EN_LINK notifications.
But it does this only for text that is entered into the control. I haven't found the way to do it for text that's loaded into the control with SetWindowText or EM_STREAMIN.
Please help! Thanks
Upd:
I've created a test application from scratch and it works fine there. I think the problem might be that I have superclassed the control, that is, created a new window class and just use the window procedure of the original class. I'm gonna try subclassing the control instead..
I just knocked up a basic WTL dialog based app containing a riched20 control and the following works fine:
CRichEditCtrl richedit = GetDlgItem(IDC_RICHEDIT);
richedit.SetAutoURLDetect(TRUE);
richedit.SetWindowText(_T("http://www.stackoverflow.com"));
I have some old MFC code that does something similar, albeit with ES_STREAM, and it works OK too.
FWIW the WTL CRichEditCtrl wrapper is pretty thin. SetAutoURLDetect simply calls SendMessage passing it EM_AUTOURLDETECT.
I am compiling with _RICHEDIT_VER set to 0x0200 FWIW.
Without knowing the format of the text you are trying to add to the control with SetWindowText and EM_STREAMIN I'm going to take a guess and say this might have something to do with the control's text mode. After setting the contents of the control try sending it a EM_GETTEXTMODE message and see if the TM_PLAINTEXT bit is set. If this is the case then try sending a EM_SETTEXTMODE message followed by EM_AUTOURLDETECT. Your code should look something like this:
UINT textmode = (UINT)::SendMessage(handle_to_control, EM_GETTEXTMODE, 0, 0);
if(textmode & TM_PLAINTEXT) {
textmode &= ~TM_PLAINTEXT; // Clear the TM_PLAINTEXT bit
textmode |= TM_RICHTEXT; // Set the TM_RICHTEXT bit
if(::SendMessage(handle_to_control, EM_SETTEXTMODE, textmode, 0) != 0) {
// Failed to set the text mode
}
}
::SendMessage(handle_to_control, EM_AUTOURLDETECT, TRUE, 0);
You might just have to rewrite the text to the control to get it to re-parse.