Re: Overlapping controls - C / C++ / MFC Discussion Boards

Re: How to get the main module of any process?

kcynic28-Dec-08 15:41

28-Dec-08 15:41

i really want to retrieve module information of the exe, i meant the parameter transferred into WinMain.
Thanks for your reply

Re: How to get the main module of any process?

Code-o-mat28-Dec-08 21:59

Code-o-mat

28-Dec-08 21:59

Ah, sorry, i thought you only needed the name of the executable.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: How to get the main module of any process?

Hamid_RT28-Dec-08 5:21

Hamid_RT

28-Dec-08 5:21

Do you need to Enum Processes with kernel and user times[^] of course David Crow has an article about enum processes on the codeproject,too.

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 )

Re: How to get the main module of any process?

kcynic28-Dec-08 15:44

kcynic

28-Dec-08 15:44

oh, sorry, i only want to get the main module of the process, not the executing time.
thanks for your reply

Overlapping controls

Moak28-Dec-08 2:47

Moak

28-Dec-08 2:47

Hi, this is a question about understanding how Windows GUI internals work.

Can someone explain why overlapping controls are not supported... or what the technical limitations are. For example MSDN says in KB79981 that overlapping controls are not supported. I guess this refers only to siblings, because there should be no problems with overlapping controls when the overlapping controls are childs (e.g. a normal dialog and some controls).
What wonders me are group boxes, where the overlapping controls are on the same client-parent hierachy. The client area of a group box clearly overlaps with the enclosed controls (e.g. group box with edit boxes in a settings dialog). Are group boxes a special case?

Thanks for some help.

My webchat in Europe Java | [Coffee]

Re: Overlapping controls

Mark Salsbery28-Dec-08 4:52

Mark Salsbery

28-Dec-08 4:52

I would say group boxes are a special case, since they draw properly
even with overlapped controls.

Groupboxes are not actual controls - there isn't a groupbox control
in the Win32 control library. A groupbox is a special case of
a static control, and I would expect you won't see too many problems
overlapping controls on static controls since static controls don't
interact with the user.

As far as overlapping controls go, I'd worry more about this:

"Another consequence of having overlapping controls is that the
user of the application may be confused, because clicking the mouse
in the common area may not activate the control that the user intended
to activate."

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

Re: Overlapping controls

Moak28-Dec-08 6:33

Moak

28-Dec-08 6:33

Thanks for your feedback, Mark. I had a hard time figuring out how group boxes fit into these design limitations. The problems I have are not with user interactions (since there are none) but with redraw artefacts that occur sometimes, e.g. when moving another application window over my window.

Lessons learned: Do not overlap siblings or use WS_EX_TRANSPARENT, instead use client-parent hierarchies. Even HTML/DOM is more consistent and logical to use. Smile | :)

My webchat in Europe Java | [Coffee]

Re: Overlapping controls

Mark Salsbery28-Dec-08 6:40

Mark Salsbery

28-Dec-08 6:40

Moak wrote:
Lessons learned: Do not overlap siblings or use WS_EX_TRANSPARENT

Yeah....transparent stuff I've found especially inconsistent with Win32
controls...one of the main reasons I've personally stopped using Win32/GDI/GDI+
for UI altogether.

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

execute a function?

dec8227-Dec-08 22:57

dec82

27-Dec-08 22:57

This is the Function declaration :
int MyClass::Send (MY_STRUCT *cStruct,
void *Para1, void *Para2,
void *Para3, void *Para4, void *Para5, void *Para6)
{
......
}

But when this function is executed ,why Para1...Para6 do not appear in the function?

MY_STRUCT Querries
Send(&Querries)

Thanks

Re: execute a function?

Code-o-mat27-Dec-08 23:35

Code-o-mat

27-Dec-08 23:35

what do you mean, "do not appear"?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: execute a function?

dec8227-Dec-08 23:44

dec82

27-Dec-08 23:44

i mean why the number of parameters in the declaration and exectution is diffrent? any way, cause i don't understand why type for Para1, ...Para6 is void?
Thanks

Re: execute a function? [modified]

Code-o-mat28-Dec-08 0:24

Code-o-mat

28-Dec-08 0:24

I think i understand what you mean. First, what you have shown as declaration seems to be more like the definition of the method. I think what causes you confusement is that at the definition you see that the method takes 7 parameters and where it is called, only one is specified. I supose that the DECLARATION of the method either gives default values of the parameters, or there is another version of this function with only one parameter. So something like:

class MyClass
{
  ...
  int Send(MY_STRUCT *cStruct, void *Para1=NULL, void *Para2=NULL, void *Para3=NULL, 
                               void *Para4=NULL, void *Para5=NULL, void *Para6=NULL);
  ...
}

class MyClass
{
  ...
  int Send(MY_STRUCT *cStruct, void *Para1, void *Para2, void *Para3, 
                               void *Para4, void *Para5, void *Para6);
  int Send(MY_STRUCT *cStruct);
  ...
}

For the void thing, the type of those parameters is not void but void*, void pointer. This basicly means it is a non-typized pointer.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

modified on Sunday, December 28, 2008 6:45 AM

Re: execute a function?

dec8228-Dec-08 3:46

dec82

28-Dec-08 3:46

what the purpose of using void pointer?

Re: execute a function?

Code-o-mat28-Dec-08 3:56

Code-o-mat

28-Dec-08 3:56

See ^CPallini's post[^]. Void pointers are "generic", if you make an "int pointer" (int *) you expect it to contain the address of an integer, if you make a "double pointer" (double *), you expect it to point at a double in memory, and so on, a void pointer can point to anything and it is "up to the context" what is done with it.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: execute a function?

Hamid_RT28-Dec-08 0:03

Hamid_RT

28-Dec-08 0:03

Your code with this on the header file

int Send (MY_STRUCT *cStruct,
void *Para1=NULL, void *Para2=NULL,
void *Para3=NULL, void *Para4=NULL, void *Para5=NULL, void *Para6=NULL);
or like this. Wink | ;)

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 )

Re: execute a function?

CPallini28-Dec-08 2:45

CPallini

28-Dec-08 2:45

See [^].

A void pointer (void *) can point to anything (usually additional info about the pointed memory data type is given by a well-know argument, in your case maybe the first one).
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

string and char?

dec8227-Dec-08 22:36

dec82

27-Dec-08 22:36

what the different between string and char?
does 'char' mean character? why we have 'unsigned char' type?
Thanks

Re: string and char?

Hamid_RT28-Dec-08 0:08

Hamid_RT

28-Dec-08 0:08

Character types in C and C++[^],String (C++)[^].

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 )

Re: string and char?

CPallini28-Dec-08 2:40

CPallini

28-Dec-08 2:40

Generally, with string we mean a sequence (i.e. one or more) of characters.
In C language, char is a data type (corrensponding to a 8-bit signed integer, i.e. ranging from -128 to 127, while an unsigned char is a 8-bit unsigned integer, i.e. ranging from 0 to 255), a string is, by convention, a sequence of chars zero terminated, for instance:

//CHAR VARIABLES
char c1 = 'A';
char c2 = 13;
char c3 = -20;

// UNSIGNED CHAR VARIABLES
unsigned char uc1 = 10;
unsigned char uc2 = 'A';
unsigned char uc3 = 250;

// STRINGS
char s1[]= { 'H', 'e', 'l', 'l', 'o', '\0'};
char s2[]= "Hello"; //Shorthand form of the above

SetWindowRgn For Text Or Label

yytg27-Dec-08 20:23

yytg

27-Dec-08 20:23

There is a lot of samples for RGN's for bitmaps but I need to create a RGN for Text with a font and size.
How can I do it?

thanks in advance

Re: SetWindowRgn For Text Or Label

Hamid_RT28-Dec-08 0:08

Hamid_RT

28-Dec-08 0:08

Can you more explain,please? Wink | ;)

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 )

Re: SetWindowRgn For Text Or Label

yytg28-Dec-08 2:04

yytg

28-Dec-08 2:04

I want to display text on the screen in such a way so the user will see only the text (Not the window).
The RGN is made to disable coloring outside of specific places in the window.
The effect of it is so you can make windows in a shape you design as so
http://www.codeproject.com/KB/GDI/coolrgn.aspx[^].
How do I do the same effect on text?

Re: SetWindowRgn For Text Or Label

Code-o-mat28-Dec-08 2:17

Code-o-mat

28-Dec-08 2:17

Do you mean you wish to create a region with the shape of text? If so, try this, am not sure if it works but it is worth a try:
1. Create your font and select into a DC (a memory DC should work)
2. Use BeginPath to begin defining a path
3. Use TextOut or DrawText or such to display the text
4. Use CreateFromPath[^] to create a region.

It is possible that it only works with vector-based fonts.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: SetWindowRgn For Text Or Label

yytg28-Dec-08 6:53

yytg

28-Dec-08 6:53

Thanks for helping
The function don't work with all fonts so I did this

SetRgn(CString str)
{
	CRect r;GetClientRect(&r);
	CMemoryDC dc(GetDC(),r);
	CFont font;font.CreatePointFont(120,L"Arial",0,true);
	COLORREF bgColor=dc.GetBkColor();
	dc.FillSolidRect(r,bgColor);

	dc.SelectFont(font);
	dc.TextOut(0,0,str);

	CRgn rgn,tRgn;rgn.CreateRectRgn(0,0,0,0);
	for (int x=r.left;x<r.right;x++)>
	{
		for (int y=r.top;y<r.bottom;y++)>
		{
			if(!(!tRgn))tRgn.DeleteObject();
			COLORREF c=dc.GetPixel(x,y);
			if(c!=bgColor)
			{
				tRgn.CreateRectRgn(x,y,x+1,y+1);
				rgn.CombineRgn(rgn,tRgn,RGN_OR);
			}
			
		}
	}
	SetWindowRgn(rgn);
}

Re: SetWindowRgn For Text Or Label

Code-o-mat28-Dec-08 9:39

Code-o-mat

28-Dec-08 9:39

I supose it really only works for vector-fonts since a raster-font probably has nothing to put into a path...Anyways, isn't that solution a bit slow?

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

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