C / C++ / MFC Discussion Boards

Re: Mouse button down

toxcct31-Aug-06 2:26

toxcct

31-Aug-06 2:26

handle WM_LBUTTONDOWN

TOXCCT >>> GEII power

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

Re: Mouse button down

IlanTal31-Aug-06 2:26

IlanTal

31-Aug-06 2:26

In the properties pane there are messages which you can override.
If you override WM_LBUTTONDOWN it should generate a routine called OnLButtonDown.
At least this is the way I do it.
Hope this is what you are looking for.

Re: Mouse button down

_AnsHUMAN_ 31-Aug-06 2:41

_AnsHUMAN_

31-Aug-06 2:41

majco333 wrote:
::GetCursorPos() but I need to detect mouse flags too..

case WM_MOUSEMOVE:
if(wParam & MK_LBUTTON)
{
   // Do something when the left mouse button is down.Take coordinates
   // Check POINT pt={LOWORD(lParam),HIWORD(lParam)};
}
break;

Hope that I understood you correctly

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Mouse button down

majco33331-Aug-06 2:35

majco333

31-Aug-06 2:35

I know but I need to detect mouse flags out of child window...

Re: Mouse button down

_AnsHUMAN_ 31-Aug-06 3:22

_AnsHUMAN_

31-Aug-06 3:22

Can you clarify what exactly do you want to do?

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Mouse button down

majco33331-Aug-06 3:25

majco333

31-Aug-06 3:25

I have own CWnd object. I need to detect mouse flags when mouse is out of this CWnd object. For example, I to handle mouse move in this
CWnd object but I want to handle mouse move when mouse is out this object.

I wand correct to handle mouse move in this object. Because in this object
is image and I need to change XOffset and YOffset by mouse move - do not only in CWnd object but out of CWnd object too...

How do I write red text to a CDialogBar?

IlanTal31-Aug-06 1:39

IlanTal

31-Aug-06 1:39

I have a dialog bar (similar to a dialog box) where I have a number of different objects. Now I have a request to write the patient name in a large font in red. I don't have a clue how to do this.
Usually one uses OnDraw(CDC *pDC) where the pDC allows you to draw what you want. For a dialog bar or a dialog box there is no OnDraw and the system does the work for you.
The only way I can think of is to make a bitmap file, where I draw into the bitmap what I want and then I display the bitmap as a picture. This is awkward especially as the program will generally be run from a CD which has no write possibilities.

There must be a better way, the question is can anyone suggest what it is?

Thanks,
Ilan

Re: How do I write red text to a CDialogBar?

ovidiucucu31-Aug-06 6:16

ovidiucucu

31-Aug-06 6:16

First of all, few aside notes:

A dialog bar is not quite similar to a dialog box, although both can be based on a dialog template.
That because CDialogBar is not derived from CDialog but from CControlBar.
OnDraw is a virtual member function of CView which is called from within WM_PAINT message handler (OnPaint). Neither CDialog, nor CDialogBar have OnDraw method.
If you need a text in a dialog box or a dialog bar is easier to put it in a static or edit control rather than drawing it in WM_PAINT message handler.

Given these said, I would like to suggest to derive from CDialogBar, make some "cosmetics", i.e. adding WM_INITDIALOG message handler (CDialogBar has not OnInitDialog virtual function like CDialog), change the edit's font in that handler, and finally set the edit's text color in WM_CTLCOLOR message handler.

Here is a sample code:

// MyDialogBar.h
class CMyDialogBar : public CDialogBar
{
// Construction
public:
   CMyDialogBar();
   
// ...
// Implementation
protected:
   
   // Generated message map functions
   //{{AFX_MSG(CMyDialogBar)
   afx_msg HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);
   //}}AFX_MSG
   afx_msg LRESULT OnInitDialog (WPARAM wParam, LPARAM lParam); // <-- added by hand
   DECLARE_MESSAGE_MAP()
};

// MyDialogBar.cpp
// ...
MyDialogBar::CMyDialogBar()
{
// ...
}
void CMyDialogBar::DoDataExchange(CDataExchange* pDX)
{
   CDialogBar::DoDataExchange(pDX);
   //{{AFX_DATA_MAP(CMyDialogBar)
   // NOTE: the ClassWizard will add DDX and DDV calls here
   //}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CMyDialogBar, CDialogBar)
   //{{AFX_MSG_MAP(CMyDialogBar)
   ON_WM_CTLCOLOR()
   //}}AFX_MSG_MAP
   ON_MESSAGE(WM_INITDIALOG, OnInitDialog) // <-- added by hand
END_MESSAGE_MAP()

LRESULT CMyDialogBar::OnInitDialog (WPARAM wParam, LPARAM lParam)
{
   if (!HandleInitDialog(wParam, lParam) || !UpdateData(FALSE))
   {
      TRACE0("Warning: UpdateData failed during dialog init.\n");
      return (LRESULT)0;
   }
   CFont font;
   font.CreatePointFont(140, _T("Times New Roman"));
   CWnd* pEdit = GetDlgItem(IDC_EDIT_PATIENT);
   _ASSERTE(NULL != pEdit); // something stinks in here!
   pEdit->SetFont(&font); // set the "larger" font
   font.Detach();

   return (LRESULT)1;
}
HBRUSH CMyDialogBar::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
   HBRUSH hbr = CDialogBar::OnCtlColor(pDC, pWnd, nCtlColor);
   if(pWnd->m_hWnd == GetDlgItem(IDC_EDIT_PATIENT)->GetSafeHwnd())
   {
      pDC->SetTextColor(RGB(255,0,0)); // set red text color
      hbr = (HBRUSH)::GetStockObject(WHITE_BRUSH); // return valid brush handle
   }
   return hbr;
}

Ovidiu Cucu
Microsoft MVP - Visual C++

Re: How do I write red text to a CDialogBar?

IlanTal3-Sep-06 21:44

IlanTal

3-Sep-06 21:44

Thank you for your reply which I didn't see until this morning. Usually it sends me mail when someone replies and since I received no mail I didn't know that you had replied.

I came up with another solution, where basically I make a static text box to receive the information and I invalidate it whenever I need to update the information. Unfortunately I can't use the WM_INITDIALOG because the user can change the study.

So, I invalidate the static box when I need a change, then validate inside WM_PAINT (which it nicely gives me as a message). Once it is valid, I write on top of the static box with the color and text size which I need. So far, it seems to be doing the job.

Here is the code:

<br />
void CMyToolbar::SetPatInfo(void)<br />
{<br />
	int oldColor, bkgColor, oldMode, fontSize = 160;<br />
	int i, j;<br />
	CFont hFont, *hOldFont;<br />
	CBrush br1;<br />
	CWnd *wnd1;<br />
	CSize sz1, sz2;<br />
	CRect rc1;<br />
	CString textOut[4];<br />
	CDC *pDC;<br />
	CCardiacDoc *pDoc;<br />
	CCardiacView *vw = CCardiacView::GetView();<br />
	pDoc = vw->GetDocument();<br />
	textOut[0] = pDoc->m_patName;<br />
	if( textOut[0].IsEmpty()) <br />
		return;<br />
	textOut[1] = pDoc->m_patID;<br />
	textOut[2] = pDoc->m_imageData[0].m_acqDateTime.Format("%d-%b-%Y");<br />
	textOut[3] = pDoc->m_styName;<br />
	if( vw->m_masterFlg <= CCardiacView::VW_CARDIAC_DISP2)<br />
		textOut[3] = "Myocardial Perfusion";<br />
<br />
	wnd1 = GetDlgItem(IDC_PATINFO);<br />
	pDC = wnd1->GetDC();<br />
	bkgColor = pDC->GetBkColor();<br />
	sz1 = 0;<br />
	for( i=j=0; i< 4; i++) {<br />
		sz2 = pDC->GetTextExtent(textOut[i]);<br />
		if( sz2.cx > sz1.cx) {<br />
			sz1 = sz2;<br />
			j = i;	// j will be the maximum string<br />
		}<br />
	}<br />
<br />
	oldColor = pDC->SetTextColor( RGB(255,0,0));<br />
	oldMode = pDC->SetBkMode( TRANSPARENT);<br />
	wnd1->GetClientRect(&rc1);<br />
	wnd1->ValidateRect(rc1);<br />
	sz1.cx = rc1.right;<br />
	sz1.cy = rc1.bottom;<br />
	br1.CreateSolidBrush(bkgColor);<br />
	pDC->FillRect(rc1, &br1);<br />
	while( fontSize > 80) {<br />
		hFont.CreatePointFont( fontSize, "Ariel", pDC);<br />
		hOldFont = pDC->SelectObject( &hFont);<br />
		sz2 = pDC->GetTextExtent(textOut[j]);	// the longest one<br />
		if( sz2.cx <= sz1.cx) break;	// found a size<br />
		pDC->SelectObject( hOldFont);<br />
		DeleteObject( hFont);<br />
		hFont.Detach();<br />
		fontSize -= 20;	// reduce font size by 2<br />
	}<br />
	for( i=j=0; i<4; i++) {<br />
		if( j+sz2.cy > sz1.cy) break;	// no more room<br />
		pDC->TextOut(0,j,textOut[i]);<br />
		j += sz2.cy;<br />
	}<br />
	pDC->SelectObject( hOldFont);<br />
	DeleteObject( hFont);<br />
	pDC->SetTextColor( oldColor);<br />
	pDC->SetBkMode( oldMode);<br />
	ReleaseDC(pDC);<br />
}<br />
<br />
void CMyToolbar::OnPaint()<br />
{<br />
	CPaintDC dc(this); // device context for painting<br />
	SetPatInfo();<br />
}<br />
<br />
void CMyToolbar::Invalidate(void)<br />
{<br />
	CWnd *wnd1;<br />
	CRect rc1;<br />
	wnd1 = GetDlgItem(IDC_PATINFO);<br />
	wnd1->GetClientRect(&rc1);<br />
	wnd1->InvalidateRect(rc1,0);<br />
}<br />

Re: How do I write red text to a CDialogBar?

ovidiucucu4-Sep-06 0:04

ovidiucucu

4-Sep-06 0:04

You have chosen the harder way, but that's it... your choice.
However, here are some "first look" remarks:
<list>

I put SetFont in WM_INITDIALOG message handler only as an example; you can put it also in any oter place, then call Invalidate() as well.

No need to write your own CMyToolbar::Invalidate function, as long as you can directly call Invalidate for the desired control.

GetDlgItem(IDC_PATINFO)->Invalidate();

As long as you have not handled WM_PAINT in the static control, but you draw text in it from another place, for sure you'll have troubles after another window will overlap; just test it and see if I'm right.

Ovidiu

Re: How do I write red text to a CDialogBar?

IlanTal4-Sep-06 20:19

IlanTal

4-Sep-06 20:19

Again I didn't receive any email to know that you had replied. In fact when I wrote my reply to you, I was convinced that you would never see it since it was so old. I just wrote the reply for the sake of completeness.

Not only were you right, you are ABSOLUTELY right in your analysis that I will have troubles since I don't handle WM_PAINT for the static control. Since I thought there was zero chance of anybody seeing this message, I opened a new message. I described exactly what you said would happen.

If I continue on with what I started then I need to figure out how to handle the WM_PAINT for the static control. So far, I can't find any way to do this. The static control has no messages which I can override. Since you told me that I need to handle this message (very correctly so!!!), could you please tell me how I get my hands onto it?

In parallel I will look into your original solution. Again, I didn't do it by your suggestion because I didn't know you answered so I had to figure out something for myself - and I chose the hard way.

I wasn't really serious about the WM_INITDIALOG, just my reply was "dead" in any case. All I needed was something which I could call more than once and where I could set the font size according to the length of the patient name (or the new patient name for the new study).

Thanks for all your comments. They are VERY helpfull.

Ilan

Re: How do I write red text to a CDialogBar?

IlanTal4-Sep-06 23:06

IlanTal

4-Sep-06 23:06

I decided that your method was SO much nicer that I would throw out what I did and use your method. Just for general education if you happen to know how I would capture the WM_PAINT for the static control, it would be nice to know. In any case, I will no longer pursue it so it is of minor importance.

I threw out the WM_PAINT message, threw out the invalidateRect and I just call it once. It turns out that I need an initialization routine for setting up the radio buttons depending upon the study type. It was most natural to just call my routine from there (like your WM_INITDIALOG suggestion).

My code is simpler now:

void CMyToolbar::SetPatInfo(void)
{
// font size can start at 16 if 3 lines are permitted.
// start with font size = 12 for 4 lines.
int fontSize = 120;
int i, j;
CFont hFont, *hOldFont;
CWnd *wnd1;
CSize sz1, sz2;
CRect rc1;
CString textOut[4];
CDC *pDC;
CCardiacDoc *pDoc;
CCardiacView *vw = CCardiacView::GetView();
pDoc = vw->GetDocument();
textOut[0] = pDoc->m_patName;
if( textOut[0].IsEmpty()) return;
textOut[1] = pDoc->m_patID;
textOut[2] = pDoc->m_imageData[0].m_acqDateTime.Format("%d-%b-%Y");
textOut[3] = pDoc->m_styName;
if( vw->m_masterFlg <= CCardiacView::VW_CARDIAC_DISP2)
textOut[3] = "Myocardial Perfusion";

wnd1 = GetDlgItem(IDC_PATINFO);
pDC = wnd1->GetDC();
sz1 = 0;
for( i=j=0; i< 4; i++) {
sz2 = pDC->GetTextExtent(textOut[i]);
if( sz2.cx > sz1.cx) {
sz1 = sz2;
j = i; // j will be the maximum string
}
}

wnd1->GetClientRect(&rc1);
wnd1->SetWindowText(textOut[0] + "\r\n" + textOut[1] +
"\r\n" + textOut[2] + "\r\n" + textOut[3]);
sz1.cx = rc1.right;
sz1.cy = rc1.bottom;
while( fontSize > 80) {
hFont.CreatePointFont( fontSize, "Ariel", pDC);
hOldFont = pDC->SelectObject( &hFont);
sz2 = pDC->GetTextExtent(textOut[j]); // the longest one
if( sz2.cx <= sz1.cx) break; // found a size
pDC->SelectObject( hOldFont);
DeleteObject( hFont);
hFont.Detach();
fontSize -= 20; // reduce font size by 2
}
wnd1->SetFont(&hFont);
hFont.Detach();
ReleaseDC(pDC);
}

I have a question about DeleteObject(hFont). Do I need it in my loop if I use hFont.Detach()? I noticed you didn't use it in your example, so I also didn't use it when I found the font I wanted. Will I add garbage if I change the patient to a new patient?

Thanks again,
Ilan

(*pf)(int); *pf(int);

Max++31-Aug-06 1:21

Max++

31-Aug-06 1:21

double (*pf)(int);
double *pf(int);
I don't understand, how are they difference?

Re: (*pf)(int); *pf(int);

salman kazi31-Aug-06 1:40

salman kazi

31-Aug-06 1:40

first is function pointer
second method is returning the double *
first is pointer to function whoes return type is double and argument type is int which refers in code segment
oter method have its return type of pointer of type double
second is same as above

Re: (*pf)(int); *pf(int);

toxcct31-Aug-06 1:56

toxcct

31-Aug-06 1:56

double (*pf)(int);
this declares pf as a pointer fo a function which gets an int parameter, and returns a double.
such a variable can be used like this :

double Foo(int i) { return (double) i; }
 
double (*pf)(int);
pf = &Foo;
double d = pf(4);

double *pf(int);
this declares a function called pf getting an int parameter and returning a pointer to a double (double*).
you can use it like this :

double* pf(int);
 
double* pd = pf(4);
double twice = (*pd) * 2;

TOXCCT >>> GEII power

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

how i block the e-mail attachment in VC++?

salman kazi31-Aug-06 1:19

salman kazi

31-Aug-06 1:19

i want to block the e-mail attachment in internet explorer. whenever user attaches or trying to attach something with the mail it block the activity. i need the code to block the gmail attachment using VC++.
any one knows please reply thanks

Windows date and time conversion

ashokvishnu31-Aug-06 0:57

ashokvishnu

31-Aug-06 0:57

Hi Folks,

Want to convert, system current time (local time) to GMT and vice versa preferable using windows api or else MFC. Any code samples available please?

Thanks

C++beginer

Re: Windows date and time conversion

_AnsHUMAN_ 31-Aug-06 1:01

_AnsHUMAN_

31-Aug-06 1:01

See Here and here

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: View Refresh problem

Cedric Moonen31-Aug-06 0:52

Cedric Moonen

31-Aug-06 0:52

PrabhuDev wrote:
I have a cscrollview in which i am filling the whole area with some color

Where are you doing that ? If it is outside of the OnPaint (or OnDraw, I don't remember) function, then of course everything will be lost when the window is redrawn. Put all your drawing code ALWAYS in this function.

Cédric Moonen
Software developer

Charting control [Updated - v1.1]

CGRAPH OR MS CHART??

weehau31-Aug-06 0:20

weehau

31-Aug-06 0:20

Hello. I am new to Visual C++.
I am doing a computer control software to control a receiver and i need to capture the signal and plot it out.
May I know which MFC class library is suitable to do graph plotting?? As far as i know there are MsChart control and CGraph class libray...what are the differences in these two?? Are both applicable in Visual C++??

I tried to find the download source for both of these class libray ..Is there any download link for all the MFC class library?? thanks in advance.

Re: CGRAPH OR MS CHART??

toxcct31-Aug-06 0:40

toxcct

31-Aug-06 0:40