Ask about SetPixel, Lineto and Moveto - C / C++ / MFC Discussion Boards

Re: .txt-File

Lucky20021-Dec-02 12:12

Lucky2002

1-Dec-02 12:12

thank you very much!!!

lucky Rose | [Rose]

Is there a way to translate your C++ code to assembly code in VS?

Redeemer-dk30-Nov-02 11:28

Redeemer-dk

30-Nov-02 11:28

thanks

Re: Is there a way to translate your C++ code to assembly code in VS?

Christian Graus30-Nov-02 12:48

Christian Graus

30-Nov-02 12:48

Yes - you hit compile Smile | :)

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: Is there a way to translate your C++ code to assembly code in VS?

Redeemer-dk30-Nov-02 14:43

Redeemer-dk

30-Nov-02 14:43

then i get an exe - machine code. not assembly code...

Re: Is there a way to translate your C++ code to assembly code in VS?

Christian Graus30-Nov-02 15:36

Christian Graus

30-Nov-02 15:36

You can trace into a release build, I believe, and see the assembler. Otherwise, the answer is no.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: Is there a way to translate your C++ code to assembly code in VS?

Anatari30-Nov-02 18:38

Anatari

30-Nov-02 18:38

I'm using Visual studio .Net now, but I'm pretty sure this is also available in VC6. Under project settings for C/C++ there is an output file section where you can specify to have it output an assembly source listing when building your project.

- Anatari

Get statusbar text area as a CPoint

RobJones30-Nov-02 8:02

RobJones

30-Nov-02 8:02

Hello,
I have a pop-up menu open when the user right clicks the status bar.. I would like to display the pop-up menu only if the right button up is right over the status bar text (not just anywhere on the status bar).. How could I go about capturing the text area as a CPoint?

Thanks,
Rob

Ask about SetPixel, Lineto and Moveto

ooosawaddee330-Nov-02 3:56

ooosawaddee3

30-Nov-02 3:56

I write these below program to draw a rectangle which have black frame. In the rectangle have 4 red points and I draw the line between 2 point. So I get the result as this picture
http://www.geocities.com/ooosawaddee3/pic/PointPicture.jpg

In the picture the red point is very small and the line between point is not exactly straight. I want the larger red point and straight line. Do you know how to do that?

	pDC->SetMapMode(MM_TEXT);<br />
<br />
	// Paint white color as the background <br />
	pDC->FillSolidRect(origin.x, origin.y, 2000, 2000, RGB(255,255,255));<br />
	<br />
	int cx = 5;<br />
	int cy = 5;	<br />
	<br />
	CPen pen, pen2;<br />
	pen.CreatePen(PS_SOLID,2, RGB(0,0,0));<br />
<br />
	pDC->SelectObject(&pen);<br />
<br />
	pDC->Rectangle(cx,cy,(cx +256), (cy + 192));<br />
	pDC->SetPixel(45,10, RGB(255,0,0));<br />
	pDC->SetPixel(47,9, RGB(255,0,0));<br />
	pDC->SetPixel(79,45, RGB(255,0,0));<br />
	pDC->SetPixel(46,120, RGB(255,0,0));<br />
<br />
	pen2.CreatePen(PS_SOLID,1, RGB(0,0,255));<br />
<br />
	pDC->SelectObject(&pen2);<br />
	pDC->MoveTo(45,10);<br />
	pDC->LineTo(79,45);

Re: Ask about SetPixel, Lineto and Moveto

Ravi Bhavnani30-Nov-02 8:51

Ravi Bhavnani

30-Nov-02 8:51

The image link is 404.

/ravi

Let's put "civil" back in "civilization"
http://www.ravib.com
ravib@ravib.com

Re: Ask about SetPixel, Lineto and Moveto

Christian Graus30-Nov-02 10:22

Christian Graus

30-Nov-02 10:22

ooosawaddee3 wrote:
pDC->SelectObject(&pen2);
pDC->MoveTo(45,10);
pDC->LineTo(79,45);

This won't draw a straight line, for a straight line, either the x or y needs to stay the same.

Your rectangle is straight - it has to be.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

WM_KEYDOWN and editbox

devvvy29-Nov-02 22:57

devvvy

29-Nov-02 22:57

hi, just want to capture WM_KEYDOWN for my editbox. yes, it doesnt support WM_KEYDOWN...

so, i guess the only way for this to work is to subclass a editbox control, inherit from both editbox and dialog class?

is this feasible? is there better alternative?

thanks a bunch.

norm

Re: WM_KEYDOWN and editbox

KingsGambit29-Nov-02 23:34

KingsGambit

29-Nov-02 23:34

Hi..

1. Subclass CEdit class. Say CMyEdit.

2. Now map the message WM_GETDLGCODE (OnGetDlgCode())

3. Return DLGC_WANTALLKEYS for the mapped function.

4. Now u will get the key down messages.

Regards,
Rejeesh

why cause exception??

ttzzgg_8071329-Nov-02 22:15

ttzzgg_80713

29-Nov-02 22:15

class TaskInfoBase {
....
virtual void setSize(int) = 0;
};

class NewTaskInfo : public TaskInfoBase {
NewTaskInfo() { InitializeCriticalSection(&m_cs); }
~NewTaskInfo() { DeleteCriticalSection(&m_cs); }
void setSize(int);
static CRITICAL_SECTION m_cs;
};

class NewTask : public NewTaskInfo, pubic NewTaskBase {

};

class HttpDownload : public DownData , public CHttpDown {
public:
HttpDownload():NewTaskInfo() {}
void write();
NewTask *m_pTask;
};

//******************************************************************************
// Implement
CRITICAL_SECTION NewTaskInfo::m_cs;

void NewTaskInfo::setSize(int i)
{
EnterCriticalSection(&m_cs); // Exception here .
m_nSize = i;
LeaveCriticalSection(&m_cs);
}

void HttpDown::write()
{
....
m_pTask->setSize(20002); // Enter NewTaskInfo::setSize();
}

Re: why cause exception??

Gary R. Wheeler30-Nov-02 2:18

Gary R. Wheeler

30-Nov-02 2:18

I would guess that the m_pTask pointer doesn't point to a valid NewTaskInfo object. If that's the case, the this pointer on entry to the setSize function isn't valid, and the resulting m_cs member passed to the EnterCriticalSection function doesn't represent a valid critical section.

Software Zen: delete this;

memory check code.

Zanphar29-Nov-02 22:08

Zanphar

29-Nov-02 22:08

I cannot remember how to implement the code in a program that I am writing over here, to check the machine to see if the correct amount of RAM is installed and available in order for my program to run.

Basically, what I am after is something such as this:

1. To check to see if there is enough memory for my program to run.
2. If there is not enough memory available, or installed for it to return with an error saying, "not enough memory, please upgrade your memory or close existing applications that are running".
3. Then close if the program can not be initialized.

I've done this with I believe, 7 lines of code previously. I am using Visual C++ 6.0 and Visual C++ .NET; rarely Visual C++ 4.0 -- but I think this could be used on all three of these suites.

I would greatly appreciate any help and response to this message and helping me out with my problem.

Re: memory check code.

Gero Gerber29-Nov-02 22:48

Gero Gerber

29-Nov-02 22:48

Try

GlobalMemoryStatus()

or

GlobalMemoryStatusEx()

Gero

Re: memory check code.

Zanphar29-Nov-02 22:53

Zanphar

29-Nov-02 22:53

I'm looking for something more along the lines of having the program check to see if there is a certain amount of RAM available, say I want the program to have 64 MB of ram available for it to run, it will -- otherwise, anything lesser it would terminate. I would like this to be hard coded; but I cannot remember it though. I'll check out what you sent me and see what I can get out of that.

Re: memory check code.

Gero Gerber29-Nov-02 23:15

Gero Gerber

29-Nov-02 23:15

The MEMORYSTATUS structure you pass to GlobalMemoryStatus() contains dwTotalPhys and dwAvailPhys. dwTotalPhys contains the total amount of physical RAM and dwAvailPhys should contain the amount of FREE physical RAM. You can also use dwMemoryLoad to query the memory load in percent.

Hope this helps,
Gero

uninstall and start menu

devvvy29-Nov-02 18:16

devvvy

29-Nov-02 18:16

i am writing a small program that uninstall a com server i wrote earlier.

cleaning the registry is no problem. The problem lies in the start menu. One item on my application's start menu is "Uninstall.exe".

launch "Uninstall.exe" cleans the registry. But how can it delete itself to remove all items from start menu?

do i have to put uninstall in a different directory besides start menu?

thanks.

norm

Re: uninstall and start menu

Nish Nishant29-Nov-02 18:18

Nish Nishant

29-Nov-02 18:18

Why dont you use a program like Installshield or the VS.NET installer which does this automatically for you?

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Re: uninstall and start menu

devvvy29-Nov-02 18:21

devvvy

29-Nov-02 18:21

does "InstallShield" does UN-installation for you? I did read up a little on InstallShield. Didnt know that it does uninstallation for u...

I figured it's pretty simple matter of registering a server, a few entries in registry and copying a few files to the client machines.

anyway, INstallation is done.

It's UN-installation where i'm having problem now.

Thanks.

norm

Re: uninstall and start menu

Nish Nishant29-Nov-02 18:46

Nish Nishant

29-Nov-02 18:46

norm wrote:
does "InstallShield" does UN-installation for you?

Of course it does. And it even removes registry entries you make via the installer Smile | :)

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Re: uninstall and start menu

devvvy29-Nov-02 21:49

devvvy

29-Nov-02 21:49

anyway, my installer/uninstaller has just been completed =)

well, at least the beta version. the licening module is missing, but the baby is ready for beta testing.

since i am pretty much the guy responsible for this part, any suggestion will be greatly appreciated Poke tongue | ;-P

as for licencing, it's pretty standard architecture. user enter a number at the installer. the installer writes the licence number (encrypted-symmetric key) in registry. Everytime the COM server runs, it loads a licence list from disk - content of which is also encrypted. Then the COM server compare the entry in registry (user entered it to registry earlier) and search the list and see if can find a match. if it does, bingo. if it doesnt, the COM server will refuse any call.

the one big problem is: u have a static licence list sitting on the disk drive. it's encrypted. but the fact that it's static means that at one point u may run out of licence number from the list.

thanks!

norm

If then statement help

Mustanggt29-Nov-02 18:04

Mustanggt

29-Nov-02 18:04

Hi, new to the C++ language, and trying to write a small program that will allow for a number input and be able to tell if it is numeric or something else. IE input number 1 - will accept, input a letter B will bomb out. Got the if then statement, but cannot figure out the rest. If someone can give me a hit it would be appreciated!

Thanks a bunch.
Smile | :)

Re: If then statement help

Nish Nishant29-Nov-02 18:17

Nish Nishant

29-Nov-02 18:17

if(isdigit(num))
{
    //okay
}
else
{
    //error
}

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.