Re: MFC OnInitDialog lengthy process halts screen painting - C / C++ / MFC Discussion Boards

David Crow31-Aug-07 5:37

31-Aug-07 5:37

After calling CreateProcess(), you could call WaitForSingleObject(). Specify a non-infinite wait time that is long enough for the process to do what it needs to.

This might be easier by calling WaitForInputIdle().

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: FindWindow

Waldermort31-Aug-07 5:44

Waldermort

31-Aug-07 5:44

Well, if it's the only way...

Here's another question similar to the topic. If a create a new console process from a console process, the new process output's to the first window ( ie a second console is not created ). When the first process terminates, the origional owner, the window remains.

Is this normal behaviour?

Re: FindWindow

Roger Broomfield31-Aug-07 5:52

Roger Broomfield

31-Aug-07 5:52

Yes.
If you want true separation of console processes you need to specify CREATE_NEW_PROCESS_GROUP if you just want a new console window you need to specify CREATE_NEW_CONSOLE

Re: FindWindow

Waldermort31-Aug-07 5:57

Waldermort

31-Aug-07 5:57

Ahh, I see. Thanks for the help.

Re: FindWindow

David Crow31-Aug-07 5:52

David Crow

31-Aug-07 5:52

WalderMort wrote:
Is this normal behaviour?

Wouldn't know, as I've never created one console process from within another. Have you tried the CREATE_NEW_CONSOLE flag?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

MFC OnInitDialog lengthy process halts screen painting

littleGreenDude31-Aug-07 5:02

littleGreenDude

31-Aug-07 5:02

MFC OnInitDialog lengthy process halts screen painting

I have a problem, this is similar to another post, where a process in OnInitDialog takes too long and slows the screen from painting on dialog startup.

OnInitDialog<br />
{<br />
if()<br />
  // do something<br />
else<br />
  DoSomethingVerryLengthy();<br />
}

The previously posted solution used a Create instead of a DoModal. This allows us to seperate the initialization of the dialog from the lengthy process. The posted solution looks like this:

pOtherDlg = new COtherDlg(...);<br />
pOtherDlg->Create(...);<br />
//** Optional if pOtherDlg not created with WS_VISIBLE style **<br />
pOtherDlg->ShowWindow(SW_SHOW);<br />
pOtherDlg->UpdateWindow();<br />
//** End Optional if pOtherDlg not created with WS_VISIBLE style **<br />
pOtherDlg->DoSomethingVerryLengthy();

My question is, since this code replaces pOtherDlg->DoModal(), and DoModal waits for the dialog to close before continuing execution. How do I make this new chunk of code wait until the user closes pOtherDlg?

Thanks in advance for the help... Smile | :)

Re: MFC OnInitDialog lengthy process halts screen painting

Naveen31-Aug-07 5:11

Naveen

31-Aug-07 5:11

littleGreenDude wrote:
How do I make this new chunk of code wait until the user closes pOtherDlg?

try calling pOtherDlg->RunModalLoop(); after pOtherDlg->DoSomethingVerryLengthy();

nave

[OpenedFileFinder]

Re: MFC OnInitDialog lengthy process halts screen painting

David Crow31-Aug-07 5:16

David Crow

31-Aug-07 5:16

Have you considered using a modal dialog that spawns a secdonary thread to do the lengthy processing? This will result in the modal dialog's primary thread being able to respond to painting and user messages.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Visual indication (Red, green)

__yash__31-Aug-07 4:35

__yash__

31-Aug-07 4:35

For my WinSock how can i show green and red signal for connected/not connected respectively? Do we have any thing in Controls in Resource editor that could be used(eg: Picture control)?

Re: Visual indication (Red, green)

Mark Salsbery31-Aug-07 5:02

Mark Salsbery

31-Aug-07 5:02

A picture control is one way. You could use two icons - one red, one green -
and set the control's icon appropriately.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Visual indication (Red, green)

__yash__31-Aug-07 5:38

__yash__

31-Aug-07 5:38

could you please elaborate on it? i m not famaliar with using icons on front-end....

Re: Visual indication (Red, green)

Mark Salsbery31-Aug-07 5:48

Mark Salsbery

31-Aug-07 5:48

yashveer wrote:
could you please elaborate on it?

Sure. Are you using MFC or straight Win32?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Visual indication (Red, green)

__yash__31-Aug-07 5:49

__yash__

31-Aug-07 5:49

MFC

Re: Visual indication (Red, green)

Mark Salsbery31-Aug-07 6:13

Mark Salsbery

31-Aug-07 6:13

Here's some of the operations involved:

Add 2 icons to your app's resources - here I'll assume they are custom size
10x10 icons, with IDs IDI_INDICATORRED and IDI_INDICATORGREEN.
Draw the icons the way you want them to look.

Then...

// Add as member of window or dialog class
CStatic m_IndicatorStatic;
...

// In OnCreate() (for a window implementation) or OnInitDialog() (for a dialog implementation)...
//   (for a dialog, if the picture control is a resource on the dialog, and m_IndicatorStatic is already
//     associated with the control, then don't do the Create() call)

//  (Adjust passed CRect to properly position control in window's client area)
if (m_IndicatorStatic.Create(NULL, WS_CHILD | SS_ICON, CRect(0,0,10,10), this, ID_INDICATORSTATIC))
{
   m_IndicatorStatic.SetIcon((HICON)::LoadImage(AfxGetResourceHandle(), MAKEINTRESOURCE(IDI_INDICATORRED), IMAGE_ICON, 10, 10, LR_SHARED));
}
...

// Later...Change the indicator to green
m_IndicatorStatic.SetIcon((HICON)::LoadImage(AfxGetResourceHandle(), MAKEINTRESOURCE(IDI_INDICATORGREEN), IMAGE_ICON, 10, 10, LR_SHARED));

Hope that helps a bit!
Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Visual indication (Red, green)

__yash__31-Aug-07 6:24

__yash__

31-Aug-07 6:24

// Add as member of window or dialog class
CStatic m_IndicatorStatic;

where do i add this IDI_ICON1 as CStatic m_IndicatorStatic?
I tried in class wizard but didnt find this ID....

Re: Visual indication (Red, green)

Mark Salsbery31-Aug-07 6:30

Mark Salsbery

31-Aug-07 6:30

In the properties for resources, you should be able to change the ID to whatever you want.

IDI_ICON1 sounds like the default ID - you can use that as well. It's just not as meaningful in the
code as an ID that's more descriptive.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Visual indication (Red, green)

__yash__31-Aug-07 6:34

__yash__

31-Aug-07 6:34

changing the ID is fine but that's not my point.....my point is:
once i change the ID name to whatever ...IDI_ICON1 or IDI_ICONREDBUTTON, after that how do i associate it with the variable
CStatic m_IndicatorStatic , as i didnt find any Icon in class wizard

Re: Visual indication (Red, green)

Mark Salsbery31-Aug-07 6:40

Mark Salsbery

31-Aug-07 6:40

I showed an example of setting a picture control's (which is a static control) icon
at runtime. "m_IndicatorStatic.SetIcon(..."

The icon is the picture. The static control is what draws the picture.

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Visual indication (Red, green)

__yash__31-Aug-07 6:47

__yash__

31-Aug-07 6:47

My view class is derived from CRecordView(). And I have a socket event, OnConnect() where i would like to display Red icon. Similarly on OnClose() it would display Green Icon in place of the Red one. Also my project is SDI application.
How can this be done??

Re: Visual indication (Red, green)

Mark Salsbery31-Aug-07 7:46

Mark Salsbery

31-Aug-07 7:46

I showed code to set the control's icon. You can do that wherever you want.
Just set the control's icon to the appropriate one.

Depending on where you get the socket event notification, you may need to post a message
to the appropriate window containing the control.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Visual indication (Red, green)

Cedric Moonen31-Aug-07 6:15

Cedric Moonen

31-Aug-07 6:15