gui programming - C / C++ / MFC Discussion Boards

Re: Lock CWnd objects

HellShrimp4free24-Dec-02 4:40

HellShrimp4free

24-Dec-02 4:40

first thanks for your great answer Rose | [Rose]

and second Forgive me for my bad English Frown | :(

let me explain my problem:
i have Some CWnd objects. each of them contains a Bitmap and a figure that will shown on the bitmap .
plz See this AVL Tree Applet : http://www.seanet.com/users/arsen/avltree.html[^]

i can Drag and Drop this CWnd objects. Even i Drag a CWnd object and move it around if it move across another one it will Clean that CWnd object.

this objects must be transparent. it seems that the only way is to even i move the mouse i have to ReDraw all the CWnd objects.

my another problem is even i draw a bitmap in CWnd and then i do Invalidate(); it cleans that CWnd WTF | :WTF:

how is that possible ??

and another thing is i have no code in OnDraw function :

void CMy15View::OnDraw(CDC* pDC)
{
CMy15Doc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
}

here is the code :

<br />
<br />
  CW[1]->Create(NULL, "",SS_BITMAP|WS_VISIBLE|WS_CHILD |WS_CLIPCHILDREN|WS_EX_TRANSPARENT    ,CRect(100, 100, 126,126), this, 0xffff); <br />
<br />
<br />
CFont cf;<br />
	cf.CreateFont (16,0,0,0,FW_BOLD|FW_EXTRALIGHT,0,0,0,DEFAULT_CHARSET,OUT_CHARACTER_PRECIS,CLIP_CHARACTER_PRECIS,DEFAULT_QUALITY,DEFAULT_PITCH|FF_DONTCARE,"Arial");<br />
		<br />
		<br />
	CBitmap b;<br />
	b.LoadBitmap(IDB_BITMAP1);<br />
<br />
	BITMAP bm;<br />
	b.GetObject(sizeof(BITMAP),&bm);<br />
<br />
	    CClientDC h2(CW[1]);<br />
		h2.SetBkMode(TRANSPARENT);<br />
		CDC *dc=new CDC;<br />
		dc->CreateCompatibleDC(&h2);<br />
		dc->SelectObject(&b);<br />
        <br />
        				<br />
		h2.SetTextColor(RGB(10,50,220));<br />
		h2.SelectObject(cf);<br />
<br />
		h2.DrawText("13",CRect(2,5,25,25),DT_CENTER);<br />
		<br />
		h2.BitBlt(0,0,bm.bmWidth,bm.bmHeight,dc,0,0,SRCAND); // if i set SRCCOPY then the this window will not be a transparent one.<br />
<br />
<br />

Re: Lock CWnd objects

Scott H. Settlemier24-Dec-02 6:02

Scott H. Settlemier

24-Dec-02 6:02

Do your painting of the window in OnDraw.
You must repaint a window whenever required.
Handle the WM_ERASEBKGND message; do nothing
and return TRUE so that your window is not
erased using its background brush.

You should probably register a new window
class for these (AfxRegisterWndClass) using
the CS_SAVEBITS style and having a null
background brush.

*.MAK files

Shah Shehpori23-Dec-02 23:42

Shah Shehpori

23-Dec-02 23:42

Hi!!

Can anyone tell me what are *.MAK files?? I downloaded many VC++ shareware programs from MSDN and many other sites. Many of such, contains *.MAK files somtimes with *.dsw and sometime without *.dsw.

Please tell me about the philosophy of *.MAK file i.e what it is ?? How can we generate it?? Why is it so useful OR any any other information you like to give ??

Re: *.MAK files

jmkhael23-Dec-02 23:47

jmkhael

23-Dec-02 23:47

*.MAK are plain text files that represents MakeFiles
It contains a list of compiler settings/Instruction
It used to be helpfull, but under windows u can get away without them

U can generate one by using the option Project->Export Makefile

We used to write these stuff, but the VC++ generate it easily
For more info text edit one Smile | :)

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: *.MAK files

Gary R. Wheeler25-Dec-02 4:34

Gary R. Wheeler

25-Dec-02 4:34

Microsoft supplies a tool called NMAKE[^]. NMAKE is an example of a 'make' tool.

Make tools use a text file that defines a set of rules and a set of dependencies. The rules define the actions required to build a program. For example, a make file may have a rule that defines how to convert a ".cpp" file to a ".obj" file (in other words, how to compile it). Similarly, it may have another rule for how to convert an ".obj" file to an ".exe" file (how to link it).

Dependencies are a list of files that depend on other files. As an example, a dependency may specify that main.obj depends on main.cpp. If main.obj doesn't exist, or is out of date with respect to main.cpp, will cause the tool to try and make it. The make tool will look for a rule on how to 'make' main.obj from main.cpp.

As others have noted, in today's world of IDE's, make files aren't used as often, since the IDE manages the build. Also, different compiler manufacturers will implement different syntax in their make files. Make files are useful though in handling build activities that the IDE doesn't handle. For example, building help files or distribution media can often be handled with a make tool.

Software Zen: delete this;

How to prevent starting task bar and pressing Alt-Tab

Vu Truong23-Dec-02 23:03

Vu Truong

23-Dec-02 23:03

Hi all,

I wrote a hook application to catch Alt-Tab keyboard pressing and starting task bar also. But I can not prevent these events from performing their tasks. I want to have my application interupt showing the task bar and switching to other windows.

Can you help me for this issue?

Merry X-mas and Happy New Year!

Re: How to prevent starting task bar and pressing Alt-Tab

jmkhael23-Dec-02 23:34

jmkhael

23-Dec-02 23:34

http://msdn.microsoft.com/msdnmag/issues/02/09/CQA/default.aspx

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

gui programming

trustno123-Dec-02 22:12

trustno1

23-Dec-02 22:12

hi everyone,

i want to learn to create gui like the one in norton antivirus(with fancy buttons and animated menu..etc) or any gui that's similar to that.. can someone suggest me a good place to start? thx in advance..

merry xmas!

Re: gui programming

Rickard Andersson²⁰23-Dec-02 23:38

Rickard Andersson²⁰

23-Dec-02 23:38

www.codeproject.com

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: gui programming

jmkhael23-Dec-02 23:42

jmkhael

23-Dec-02 23:42

Cheers

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: gui programming

Rickard Andersson²⁰23-Dec-02 23:52

Rickard Andersson²⁰

23-Dec-02 23:52

Yeah!
I don't see why people don't search CodeProject before asking?
I mean, CP is full of MFC stuff and much is GUI stuff!

Cheers and mary christmas to you and everyone else!

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: gui programming

Christian Graus24-Dec-02 0:45

Christian Graus

24-Dec-02 0:45

As has been said, this site is full of examples of all that stuff. Plus one of our regulars worked on it, so maybe if you get stuck you should ask specific questions here.

Christian

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

C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002

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

Ostream pointer to the standard output

tom7623-Dec-02 21:56

tom76

23-Dec-02 21:56

Hello!
I'm taking a couple of functions from a windows program and putting them in to my console application (with mfc) but to call one function I need a pointer to the output device. In windows this pointer pointed to a list box, but since consoles don't have those I want to write to the basic output device (like cout does). I've got

ostream* Console = NULL;
Console = ???

I can't find out how to tell the pointer that it points to the console window. Is this possible?

The functions simply get the atached printers and display the text strings.

Obseve everything, remember more...

Re: Ostream pointer to the standard output

udayGovekar23-Dec-02 22:40

udayGovekar

23-Dec-02 22:40

Check this,

BOOL bFlag = AllocConsole();
HANDLE hnd =GetStdHandle(STD_OUTPUT_HANDLE);
DWORD dw = GetLastError();
unsigned long i;
WriteConsole(hnd,"test", 4,&i , NULL);

Checked background

comrade23-Dec-02 21:17

comrade

23-Dec-02 21:17

Hi.

How would I go about drawing background Windows uses for checked (pressed) buttons on toolbars? I've attached screenshot.

http://www.comrade64.com/images/checked.gif

comrade
http://comrade.ownz.com/
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Re: Checked background

Christian Graus24-Dec-02 0:46

Christian Graus

24-Dec-02 0:46

I believe the top/left lines are a dark grey and the bottom/right ones are a light grey.

Christian

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

C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002

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: Checked background

comrade24-Dec-02 8:36

comrade

24-Dec-02 8:36

No, it really alternates every pixel (diagonally) from white to light gray.

comrade
http://comrade.ownz.com/
Souz nerushimiy respublik svobodnih
Splotila naveki velikaya Rus
Dazdrastvuet sozdanniy volei narodov
Ediniy, moguchiy Sovietskiy Souz!

Re: Checked background

PJ Arends24-Dec-02 9:00

PJ Arends

24-Dec-02 9:00

Use a pattern brush. see CBrush::CreatePatternBrush() or CBrush::CBrush(CBitmap* pBitmap) in MSDN[^] for more information.

CPUA 0x5041

Sonork 100.11743 Chicken Little

"So it can now be written in stone as a testament to humanities achievments "PJ did Pi at CP"." Colin Davies

Within you lies the power for good - Use it!

Waiting for Microseconds

Anonymous23-Dec-02 21:02

Anonymous

23-Dec-02 21:02

I want wait for 20 microseconds, How can I get this??

Re: Waiting for Microseconds

Christian Graus24-Dec-02 0:48

Christian Graus

24-Dec-02 0:48

Count to 20 really fast ?

::SetTimer allows you to set a timer in 1,000ths of a second.

Christian

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

C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002

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: Waiting for Microseconds

Vagif Abilov24-Dec-02 5:03

Vagif Abilov

24-Dec-02 5:03

You can't wait 20 microseconds using standard Windows timer. Standard Windows API has resolution of 1 ms, and AFAIK in reality it is even less precise. Mutlimedia applications use so called multimedia timer, so if you have a look at DirectX SDK (sorry, I'm not an expert in it), you will find more.

Вагиф Абилов
MCP (Visual C++)
Oslo, Norway

Hex is for sissies. Real men use binary. And the most hardcore types use only zeros - uppercase zeros and lowercase zeros.
Tomasz Sowinski

Re: Waiting for Microseconds

Gary R. Wheeler25-Dec-02 4:48

Gary R. Wheeler

25-Dec-02 4:48

You can measure short intervals using QueryPerformanceCounter and QueryPerformanceFrequency.

I doubt that there is anything you can do in application code to delay an exact 20 microsecond interval. What do you need this for?

Software Zen: delete this;

Re: Waiting for Microseconds

Mike Nordell26-Dec-02 7:29

Mike Nordell

26-Dec-02 7:29

Spinlock. You are writing a kernel mode device driver? If not, and you really need to do this in user-land, you should probably have a look at one of the many available realtime OS'es.

Please note, you'll get no friends from using spinlocks - tying up CPU resources for no other purpose than waiting is more like the MS-DOS era, where resources were not shared and the only (available) machines that had multitasking was the Amiga and Unices.

Sending messages to parent window

brandon187923-Dec-02 19:53

brandon1879

23-Dec-02 19:53

I want to have a dialog inside my CTabCtrl send a message to the main dialog. But how I do that? I have the dialog as an object under my tab class which is under my parent window. I'm using MFC and the parent class is a CWnd under CWinApp.

Re: Sending messages to parent window

Christian Graus23-Dec-02 20:48

Christian Graus

23-Dec-02 20:48

::SendMessage(::GetParent(*this), .........

Christian

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

C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002

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

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