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Re: /ShellExecute-/ How can I find the HWND* of the parent window?

C^hris L^osinger18-Jul-01 10:56

C^hris L^osinger

18-Jul-01 10:56

try:

this->m_hWnd

-c

------------------------------
Smaller Animals Software, Inc.
http://www.smalleranimals.com

Re: /ShellExecute-/ How can I find the HWND* of the parent window?

Bret Faller18-Jul-01 12:38

Bret Faller

18-Jul-01 12:38

GetSafeHwnd() is the proper way to do this.

Bret Faller
Odyssey Computing, Inc.

SelectObject (Help a beginner!)

SinclairE18-Jul-01 9:20

SinclairE

18-Jul-01 9:20

I've found that using CDC.SelectObject() on a locally created object causes a massive drain on system resources, especially if you use it during an intensive screen update (OnDraw of a CScrollView, for example).

CScrollView::drawSomething() //called from OnDraw
{
CClientDC cdc(this);
CPen lightBluePen(PS_SOLID, 1, 0x00FFFFCC);

cdc.SelectObject(lightBluePen);

// blah blah
}

Apart from declaring lightBluePen as a modular variable which seems to stop this, is there a better way, ie some way of freeing this resource?

Thanks in advance!

Re: SelectObject (Help a beginner!)

José Luis Sogorb18-Jul-01 10:03

José Luis Sogorb

18-Jul-01 10:03

Well, this was a problem I had, also, a time ago and I found the solution in this forum:

I have this in a header file:

class CSaveDC {
public:
CSaveDC(CDC * dc) { sdc = dc; saved = dc->SaveDC(); }
virtual ~CSaveDC() { sdc->RestoreDC(saved); }
protected:
CDC * sdc;
int saved;
};

And in the code file in my OnDraw function:
CPen m_pPincelR, m_pPincelN, m_pPincelA, m_pPincelM, m_pPincelV;
CFont m_pLetraP, m_pLetraG;

m_pLetraG.CreateFont(16,0,0,0,FW_SEMIBOLD,FALSE,FALSE,FALSE,
DEFAULT_CHARSET,OUT_DEFAULT_PRECIS,CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,
18,"Times New Roman");

m_pLetraP.CreateFont(15,0,0,0,FW_NORMAL,FALSE,FALSE,FALSE,
DEFAULT_CHARSET,OUT_DEFAULT_PRECIS,CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY,
18,"Times New Roman");

m_pPincelR.CreatePen(PS_SOLID,2,RGB(255,0,0));
m_pPincelN.CreatePen(PS_SOLID,2,RGB(255,96,0));
m_pPincelA.CreatePen(PS_SOLID,2,RGB(0,255,255));
m_pPincelM.CreatePen(PS_SOLID,2,RGB(255,0,255));
m_pPincelV.CreatePen(PS_SOLID,2,RGB(0,255,0));

{
CSaveDC sdc (pDC);
pDC->SelectObject(m_pLetraG);
pDC->TextOut(25,-2,actual);

pDC->SelectObject(m_pLetraP);

..more TextOut...

pDC->SelectObject(m_pPincelR);

...drawing functions...

pDC->SelectObject(m_pPincelN);

...drawing functions...

pDC->SelectObject(m_pPincelA);

...drawing functions...

pDC->SelectObject(m_pPincelM);

...drawing functions...

pDC->SelectObject(m_pPincelV);

...drawing functions...

}
... OnDraw follows...

And it works fine, I've tried to redraw many times and there is not memory consumption.
The { and } are very important, when it finishes, the selections are automatic deleted.

Re: SelectObject (Help a beginner!)

Ben Burnett18-Jul-01 11:52

Ben Burnett

18-Jul-01 11:52

Its just a guess, but could it be because your not releasing the object you select into the DC(the blue pen) when your done.

I think it should look more like this;

CScrollView::drawSomething() //called from OnDraw <br />
{ <br />
<br />
CClientDC cdc(this); <br />
<br />
CPen lightBluePen(PS_SOLID, 1, 0x00FFFFCC); <br />
<br />
CPen * pOldPen = cdc.SelectObject(lightBluePen); <br />
<br />
// blah blah<br />
<br />
cdc.SelectObject(pOldPen); <br />
<br />
}

Just my 2 cents.

-Ben

---------
On the topic of code with no error handling -- It's not poor coding, it's "optimistic" Wink | ;)

Maximum index of array?

18-Jul-01 9:14

How would i find the max index of an array? For example:
long myarray[10];
the function should return 10
any ideas?

Re: Maximum index of array?

Tim Deveaux18-Jul-01 9:21

Tim Deveaux

18-Jul-01 9:21

You can try this:

int maxArray = sizeof(myarray)/sizeof(long);

later
...er - well I guess the max index would be that - 1 ...

Re: Maximum index of array?

Nemanja Trifunovic18-Jul-01 10:27

Nemanja Trifunovic

18-Jul-01 10:27

Why don't you use STL vector instead of "plain" array?

I vote pro drink Dead | X|

DaoRecordSet Sorting

otvac18-Jul-01 8:46

otvac

18-Jul-01 8:46

How do I sort DaoRecordsets on a numeric field?

m_pSet->m_strSort="[My long Field]"; gives a sort, but it appears to alpha-numeric, not numeric.

All help apperciated!

Richard

Re: DaoRecordSet Sorting

Carlos Antollini18-Jul-01 9:30

Carlos Antollini

18-Jul-01 9:30

The problem is that m_strSort only returns the name of the fields or fields that were includes in the Order By if you opened the recordset with a Query.
For example if you open de recordset with some like this:
Select * from table Order by field1, field2

The m_strSort will return you 'field1, field2'.

For make a order in a table you will need to use CDaoRecordset::SetCurrentIndex but the problem is that the field must be a index.

Did you Understand?

Cheers.

Carlos Antollini.

Changing specific pen attributes

José Luis Sogorb18-Jul-01 8:17

José Luis Sogorb

18-Jul-01 8:17

Suppose I have 2 pens created like these:

CPen m_pPenR, m_pPenN;

m_pPenR.CreatePen(PS_SOLID,3,RGB(255,0,0));
m_pPenN.CreatePen(PS_SOLID,3,RGB(255,150,0));
...
more code
...
pDC->SelectObject(m_pPenR);
myGraphic (a,b,pDC);
...
more code
...
pDC->SelectObject(m_pPenN);
myGraphic (c,d,pDC);
...
And into myGraphic(...) function I want to use the selected pens, drawing some lines but changing sometimes one or two of pens parameters (for example I want it with PS_DOT and width=1pixel, but remaining the color) and sometimes don´t.
How can I do it?
Thank you.

unsigned char to char??? char to unsigned char???

18-Jul-01 7:24

Hi all,

Does anyone know how to transfer the unsigned char to char AND how to transfer the char to unsigned char???

I know it is stupid......;P

Thanks

Re: unsigned char to char??? char to unsigned char???

Michael Dunn18-Jul-01 12:02

Michael Dunn

18-Jul-01 12:02

Do you just want to assign between two variables? Then use casts:

signed char ch = -1;
unsigned char uch = (unsigned char) ch;  // uch is now 255

--Mike--
http://home.inreach.com/mdunn/
Sometimes, arming yourself with a big pointy stake just won't do you any good.

Optimization file find operations

Ivan Polak18-Jul-01 7:18

Ivan Polak

18-Jul-01 7:18

Hi. I have a big problem about my application like a Windows Commander. When I have folder and folder has too many files, when I double-click to folder, I must wait about 10 and more seconds to open a folder. I need any optimization idea to find file operation - need file parameters and file icon (I used two methods - use ::FindFirstFile, ::FileNextFile and second method is use CFileFind). Thanks Ivan Confused | :confused:

Thanx alot!

18-Jul-01 7:02

I love this Place. I came to Codeproject.com with this question and here it is!
Thanx alot!

Enzi Big Grin | :-D

Default button in toolbar?

Jake Palmer18-Jul-01 6:49

Jake Palmer

18-Jul-01 6:49

Everybody's seen default buttons (that click when enter is pressed) in dialog boxes, but now I have a toolbar button that I would like to act this way. There is an edit ctrl in the toolbar, and when the user types a value they should be able to press enter if they're too lazy to click on the button. Ideas?
thanks,
Jake

Re: Default button in toolbar?

Jake Palmer18-Jul-01 12:07

Jake Palmer

18-Jul-01 12:07

If you are fairly certain this can not be done, can you let me know, because my boss has been bugging me about it for over a week Big Grin | :-D

I've told him I can't do it, and I need some backup from you guys. thanks,
Jake

Re: Default button in toolbar?

18-Jul-01 17:17

I would think it is possible to do this by making a custom command bar with your edit control and button. You could then capture the keydown events and check for enter.

Re: Default button in toolbar?

Diarrhio18-Jul-01 20:04

Diarrhio

18-Jul-01 20:04

I think you can just derive a class from CToolBar, override PreTranslateMessage, and do something like this:

/*********************************************************************/
BOOL CYourToolbar::PreTranslateMessage(MSG* pMsg)
{
if( pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_RETURN ) {
//
// Call the handler for the button
//
return TRUE;
}
else
return CToolbar::PreTranslateMessage( pMsg );
}

I'm not totally sure. This is hacked from some other project... but you might give it a try.

Slow down when typing?

Bryan Pietrzak18-Jul-01 6:45

Bryan Pietrzak

18-Jul-01 6:45

My team is having an odd problem:

We are getting severe slowdowns when typing in largeish files: 2, 3 sometimes as long as four seconds when hitting Return.

It seems to be limited to fairly large source files (3,000 or more lines, but I haven't narrowed down the threshold yet).

And if we close the workspace, then there is no problem at all with performance. Reopen the workspace, and the slowdowns are back. So, it's clearly something in Visual Studio.

Some facts about what we're doing:

- Our workspace is large with hundreds of .cp files and more than a thousand .h files broken up into "folders" within the workspace.
- In fairly large files, typing can be very slow: 2, 3 even four seconds of a "pause" when hitting return
- Task Manager does show CPU spikes during this activity
- We are running P3 733 dual CPU Compaq AP550 workstations
- If we close the workspace, typing performance is normal and does not exhibit the slowdowns
- Generate Browse Info is turned off in Project Settings | C++
- Build Browse Info file is turned off in Project Settings | Browse Info
- We are no longer using USERTYPE.DAT for user defined keywords, the file does not even exist
- We are using SourceSafe for source control, but SourceSafe itself is not open at the time of these slowdowns
- All four of the VS "statement completion options" in Options | Editor are off (Auto list members, auto type info, etc.)
- The VS "auto indent" feature in Options | Tabs seems to make no difference: we've tried None, Default and Smart
- We are using Visual C++ 6.0 SP5
- We are not using any other AddIns other than DevTrueColor to patch the color menus to allow us any color in the syntax color chooser
- I've search MSDN and the KB as much as I can, but can't find anything

Any ideas would be very much appreciated.
Confused | :confused:

--
Bryan

Re: Slow down when typing?

Bryan Pietrzak18-Jul-01 8:57

Bryan Pietrzak

18-Jul-01 8:57

Some information was sent to me offline...

OK, my search on Knowledge Base failed because I search for "slow typing". But... Q202591 "Developer Studio Source and Dialog Editors Respond Slowly":

"When editing source code or a dialog resource with the Visual C++ version 6.0 source or resource editors, the user may experience a slowdown in performance. The resource editor shows a noticeable delay when tabbing between controls. In the source editor, the cursor seems to hesitate when passing through function definitions when using the arrow keys. In both instances the CPU usage is near or at 100%. "

This sounds exactly like my problem so I'll pursue this. Thanks!

--
Bryan

Function to see cpu usage?

Tim Rymer18-Jul-01 6:29

Tim Rymer

18-Jul-01 6:29

I've been looking for a function on MSDN that will let me get a percentage of the system's cpu usage, but to no avail Frown | :(

Anything similar to this, like a struct that could let me calculate the percent usage would be just as helpful! Suspicious | :suss:

Assign color to CRectTracker?

18-Jul-01 5:17

Anyone know how to change or assign a color to a CRectTracker? Thanks.

Re: Assign color to CRectTracker?

Ben Burnett18-Jul-01 12:02

Ben Burnett

18-Jul-01 12:02

Subclass it, add the apropriate get/set methods and overide the Draw method to use your brushes.

-Ben

---------
On the topic of code with no error handling -- It's not poor coding, it's "optimistic" Wink | ;)

Help, please!

18-Jul-01 4:57

How to call by cl.a button another exe programs? Blush | :O

Thank's.

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