C / C++ / MFC

Jonathan Davies25-Feb-09 10:30

Jonathan Davies

25-Feb-09 10:30

I think the idea is that you don't need to. For instance if you are viewing a split document e.g. page 1 and page 7, when you ask for the view which one do you want?
You are meant to update the data your document contains e.g. a text or drawing then from the document call UpdateAllViews to have the view (or views) redraw/paint your document so you see the changes.
Also if the View knows about the document and the document the view it can get complicated with circular references.

«_Superman_»25-Feb-09 17:41

«_Superman_»

25-Feb-09 17:41

You can use CDocument::GetFirstViewPosition and CDocument::GetNextView to iterate through all the views that are attached to a document.

«_Superman_»
I love work. It gives me something to do between weekends.

Hamid_RT25-Feb-09 19:43

Hamid_RT

25-Feb-09 19:43

See CView Access From Anywhere[^] and questions on the bottom of page.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Iain Clarke, Warrior Programmer26-Feb-09 1:54

How to resolve LNK2001 error (ver: VC ++ 8.0 and .net 2005)

26-Feb-09 1:54

I would also point you at UpdateAllViews member function of the CDocument class.

As has been said, the whole point is that CDocument has no clue whatsoever about the views. This lets you replace / add different views, and only change one area of your code.

This is a GoodThing(tm).

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

SIJUTHOMASP25-Feb-09 9:14

SIJUTHOMASP

25-Feb-09 9:14

I have upgraded a project written in VC++ 7.1 version using the .net 2005 wizard. After fixing few code related issues, I have got the following errors while building
error LNK2001: unresolved external symbol DllCanUnloadNow
error LNK2001: unresolved external symbol DllGetClassObject

I have declared this in the .def file as
DllCanUnloadNow PRIVATE
DllGetClassObject PRIVATE

I would really appreciate for showing me the right way to resolve this please. Thanks in advance.

SoftwareDeveloper(.NET)

Re: How to resolve LNK2001 error (ver: VC ++ 8.0 and .net 2005)

ky_rerun25-Feb-09 16:21

ky_rerun

25-Feb-09 16:21

did you switch a dll from being a com DLL to a managed DLL?

a programmer traped in a thugs body

Re: How to resolve LNK2001 error (ver: VC ++ 8.0 and .net 2005)

SIJUTHOMASP26-Feb-09 3:15

SIJUTHOMASP

26-Feb-09 3:15

Few libraries actually was written in vc 6 and using those with that..but it has been upgraded to vc 7 ..

Thanks

SoftwareDeveloper(.NET)

Re: How to resolve LNK2001 error (ver: VC ++ 8.0 and .net 2005)

SIJUTHOMASP26-Feb-09 8:59

SIJUTHOMASP

26-Feb-09 8:59

Finaly I could resolve the issue. I have done the following steps to resolve the issue.

1) Have set "Multi-Threaded Debug(/MTD" in all the projects under workspace. this thing was correct already but mentioning here for future reference.
2) In the Resources-->Preprocessor Definitions , I have set "_DEBUG,_MT,DLL". I believe this part , corrected the issue. previously it was having only "_DEBUG".

Thanks,.. Big Grin | :-D

SoftwareDeveloper(.NET)

windows message - when the window was displayed

daavena25-Feb-09 8:18

Re: windows message - when the window was displayed

25-Feb-09 8:18

Hello,

I am using dialog boxes and I need to capture window message when the window/dialog was displayed

I tried WM_SHOWWINDOW but the help says:
WM_SHOWWINDOW message is sent to a window when the window is about to be hidden or shown.

I can not fint the proper message.Can you give me a hind?

Thank you very much.

Stuart Dootson25-Feb-09 8:29

Stuart Dootson

25-Feb-09 8:29

daavena wrote:
displayed

What do you mean by 'displayed' - created, shown, redrawn?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: windows message - when the window was displayed

daavena25-Feb-09 8:38

Re: windows message - when the window was displayed

25-Feb-09 8:38

when I click on the button I need:

show window/dialog with message "Loading profile it can take several minutes" inside
and than when the window is shown(is visible) I need to run the function - but only once.

Stuart Dootson25-Feb-09 9:00

Stuart Dootson

25-Feb-09 9:00

There's no window message that you only get when the window is shown the first time.

Instead, catch WM_SHOWWINDOW. Maintain a flag that tells you if your message has been shown. You can use this flag to tell you whether you should show your message or not - something like:

void CMyWindow::OnShowWindow(BOOL bShow, UINT nStatus)
{
   if (bShow && !m_bShownMyMessage)
   {
      // show the message
      m_bShownMyMessage = TRUE;
   }

   // Do other stuff
}

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: windows message - when the window was displayed

daavena25-Feb-09 9:59

Re: windows message - when the window was displayed

25-Feb-09 9:59

Thaks for reply,

WM_SHOWWINDOW

WPARAM wParam
LPARAM lParam;

Parameters

wParam
Specifies whether a window is being shown. If wParam is TRUE, the window is being shown. If wParam is FALSE, the window is being hidden.

lParam is still 0

when I capture WM_SHOWWINDOW so wParam is always 1 -the window is being shown.
My function always runs first. Then I see the window.
This function takes a time - 10sec, that is reason why I need to see the window first.

WM_SHOWWINDOW message is called only once. I think it is not possible to do that.

Iain Clarke, Warrior Programmer25-Feb-09 8:29

Re: windows message - when the window was displayed

25-Feb-09 8:29

WM_WINDOWPOSCHANGING?

Or you could even could WM_PAINT - that was when the window was actually shown to people!

So it depends on what you mean...

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

daavena25-Feb-09 8:48

Setting the Window Orientation

25-Feb-09 8:48

Thanks for reply.

I need message when window/dialog has been shown - I need to see the window first and then run my function(only once).

BobInNJ25-Feb-09 6:41

BobInNJ

25-Feb-09 6:41

Please consider the following code fragment written using C++ and MFC.

void<br />
GraphWindow::OnPaint()<br />
{<br />
	CPaintDC dc(this);<br />
	dc.TextOut( 50, 50, TEXT("A Parabola"), 11 );<br />
<br />
	dc.SetWindowOrg( -cx/2, -cy/2 );<br />
<br />
	CPen pen(PS_SOLID, 2, RGB(255, 0, 0) );<br />
	CPen *pOldPen = dc.SelectObject( &pen );<br />
	<br />
	dc.MoveTo( -10, 100 );<br />
	for( int i = -10; i<=10; i++ )<br />
		dc.LineTo( i, (i*i) );<br />
<br />
	dc.SelectObject( pOldPen );<br />
}<br />

This routine is suppose to graph the curve y = x^2. However, it graphs the function y = -x^2 because the windows orientation is that an increasing y value, moves down in the window. If I change the call to LineTo to the following, it works:
dc.LineTo( i, -(i*i) );
I believe that there is a call that will change the window orientation such that an increasing y value moves up rather than down. However, I have been unable to find the call. I am hoping that somebody can tell me what it is.

Thanks

Bob

Re: Setting the Window Orientation

Iain Clarke, Warrior Programmer25-Feb-09 8:26

Re: Setting the Window Orientation

25-Feb-09 8:26

This article should help you a lot...

http://www.codeproject.com/KB/applications/viewport.aspx[^]

Iain.

Codeproject MVP for C++, I can't believe it's for my lounge posts...

BobInNJ25-Feb-09 15:20

BobInNJ

25-Feb-09 15:20

Iain,

Thanks for the response. Based the article you sited, I tried the following piece of code:

<br />
void<br />
GraphWindow::OnPaint()<br />
{<br />
	CPaintDC dc(this);<br />
<br />
	dc.TextOut( 50, 50, TEXT("A Parabola"), 10 );<br />
<br />
	dc.SetMapMode( MM_HIENGLISH );<br />
<br />
	CPen pen(PS_SOLID, 2, RGB(0, 255, 0) );<br />
	CPen *pOldPen = dc.SelectObject( &pen );<br />
<br />
	dc.MoveTo( 100, 100 );<br />
	dc.LineTo( 800, 800 );<br />
<br />
	dc.SelectObject( pOldPen );<br />

I called the method SetMapMode to orient the window such that positive x values are to the right and positive y values are up. With the call to SetMapMode in there, the line does not appear. Without the call to SetMapMode, the line does appear. I do understand and I am hoping that somebody can explain it to me.

Thanks

Bob

Re: Setting the Window Orientation

Iain Clarke, Warrior Programmer25-Feb-09 21:51