C / C++ / MFC Discussion Boards

Hiding cursor

Kleser26-Apr-06 12:13

Kleser

26-Apr-06 12:13

how can make a cursor invisible in a certain application?

Re: Hiding cursor

Michael Dunn26-Apr-06 13:13

Michael Dunn

26-Apr-06 13:13

SetCursor(NULL)

--Mike--
Visual C++ MVP Cool | :cool:

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Re: Hiding cursor

Naveen26-Apr-06 17:16

Naveen

26-Apr-06 17:16

Kleser wrote:
how can make a cursor invisible in a certain application?

ShowCursor( );

nave

Measure width of a single character

richiebaby26-Apr-06 12:08

richiebaby

26-Apr-06 12:08

Hi
Could I please get some help measuring the width of a character.

I am writing a simple app that draws text to the form and is it is possible to set the font differently for each char. It is within .NET 2003 and I am currently doing this to get the width of a character (each string is one character):

textSize = g->MeasureString(tempString, font);

This works but I have to optimise the code as much as possible and I have been informed by my C++ lecturer to 'hand write' another way to measure the width of a string/char.

Could someone please explain how this could be done by means of an example? Initial research has led me to GetCharWidth32 and GetTextExtent, but I'm buggered if I know how they work! For instance, GetCharWidth32 has 'hdc' (a handle to DC) -- That's all that MSDN tells you and I have absolutely no idea what it is!!!

Could someone please supply an example where you know what the char or string (with 1 character) is and simply get a float or int that is the width?

Thanks

Re: Measure width of a single character

Trollslayer26-Apr-06 12:34

Trollslayer

26-Apr-06 12:34

GetTextExtent works with a device context, you need ot create a font and select it into the device context first.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Re: Measure width of a single character

richiebaby26-Apr-06 23:52

richiebaby

26-Apr-06 23:52

Thanks for the reply(ies) everybody.

So it looks as though I am on the right tracks!

I would really like to be shown a little mor of how GetTextExtent works.

I have already created a font, like this:

<br />
System::Drawing::Font* font;<br />
String* fontType = S"Arial";<br />
font = new System::Drawing::Font(fontType, fontSize, FontStyle::Bold);<br />

Could somebody please explain how to 'first select the font into a device context'?

Thank you

Re: Measure width of a single character

Blake Miller26-Apr-06 13:03

Blake Miller

26-Apr-06 13:03

GetCharABCWidths and GetCharWidth32 might be your friends Wink | ;)

People that start writing code immediately are programmers (or hackers), people that ask questions first are Software Engineers - Graham Shanks

Get current cursor type

khb26-Apr-06 9:21

khb

26-Apr-06 9:21

Hi together,

is it somehow possible to get the current type of the mouse cursor?
I'd like to check whether the current cursor is the context help cursor (IDC_HELP) or not.
However, I have no idea how to accomplish that Frown | :(

Thank you very much for your help,
Marcus.

Re: Get current cursor type

Ryan Binns26-Apr-06 14:02

Ryan Binns

26-Apr-06 14:02

GetCursor() or GetCursorInfo()

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Get current cursor type

khb26-Apr-06 21:16

khb

26-Apr-06 21:16

Hi Ryan,

thank you very much for your hint. I got it working! However, for me it wasn't that straightforward to get it run. If anybody is interested in the solution, here it is:

// Load a cursor of the type that should be checked.
// The clue: The handle to the cursor is unique, so we can use it for comparison.
HCURSOR hHelpCursor = LoadCursor(NULL, IDC_HELP);
 
// Use GetCursorInfo() to get information about the current (global) cursor.
CURSORINFO ci;
ci.cbSize = sizeof(ci);
if(GetCursorInfo(&ci))
{
  if(ci.hCursor == hHelpCursor)
    cout << "Context help cursor active!" << endl;
}

Any hints for improvement are welcome!

Thanks again,
Marcus.

Re: Get current cursor type

Ryan Binns26-Apr-06 23:50

Ryan Binns

26-Apr-06 23:50

khb wrote:
Any hints for improvement are welcome!

It's exactly what I'd do Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Re: Get current cursor type

balaji16727-May-14 1:39

balaji167

27-May-14 1:39

How to check the CListCtrl's column resize cursor. I don't know that resource id.

Call Dll

cuongcntt200226-Apr-06 8:01

cuongcntt2002

26-Apr-06 8:01

I have a dll file written by MFC6.0. Now, I want to use it in MFC8.0, but I don't know how to import it to my project MFC8.0.

Can anyone help me?

Re: Call Dll

Nibu babu thomas26-Apr-06 17:19

Nibu babu thomas

26-Apr-06 17:19

Does LoadLibrary help? Unsure | :~

Nibu thomas
Software Developer

Big int

#hackC++26-Apr-06 7:48

#hackC++

26-Apr-06 7:48

<br />
int bignum = 123123425364347456758696679;<br />

The compiler says: intger to big for int type (or something like that)

How do i make the bignum work? (i'm guessing this is a simple question soooo be gentle Sniff | :^)

)

Re: Big int

Joe Woodbury26-Apr-06 7:54

Joe Woodbury

26-Apr-06 7:54

Try __int64

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: Big int

David Crow26-Apr-06 8:02

David Crow

26-Apr-06 8:02

Not even close to being large enough. The largest value for __int64 is 2⁶³, or 2⁶⁴ if unsigned.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: Big int

Joe Woodbury26-Apr-06 8:18

Joe Woodbury

26-Apr-06 8:18

The pattern of his number indicated to me that he had just semi-randomly typed them to indicate he needed something larger than an int.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: Big int

David Crow26-Apr-06 8:25

David Crow

26-Apr-06 8:25

As he was not very specific, that's always a possibility.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: Big int

#hackC++26-Apr-06 8:04

#hackC++

26-Apr-06 8:04

_int64

Does that mean a int thats 64 numbers long or is that defined the standard library?
nevermind........ 2 to the power or 64. I see.

Is LARGE_INTEGER in the standard library too? <--- is that C style programming?

"If you try to talk sense to a fool, he'll think your foolish"

-- modified at 14:06 Wednesday 26th April, 2006

Re: Big int

Joe Woodbury26-Apr-06 8:20

Joe Woodbury

26-Apr-06 8:20

__int64 is 64-bits long. I assumed you had simply typed gibberish indicating you needed a long number. If, however, the number you typed earlier (123123425364347456758696679) actually needs to be stored, __int64 isn't long enough.

LARGE_INTEGER is a Win32 thing, but it may be defined by other headers.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: Big int

Waldermort26-Apr-06 7:58

Waldermort

26-Apr-06 7:58

you could also use LARGE_INTEGER

Re: Big int

David Crow26-Apr-06 8:06

David Crow

26-Apr-06 8:06

Which also has the same 2⁶³ limitation as __int64.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: Big int

Waldermort26-Apr-06 8:11

Waldermort

26-Apr-06 8:11

Thanks for pointing that out Mr Crow. Though might I say, it has taken you two replies to say that those of us who are trying to help the OP are wrong. But you have yet to suggest an answer yourself.

Re: Big int

David Crow26-Apr-06 8:24

David Crow

26-Apr-06 8:24

waldermort wrote:
But you have yet to suggest an answer yourself.

To suggest a way not to do something is in itself an answer. On a similar note, by eliminating all the wrong/incorrect ways of doing something, what we should be left with is the correct way. This was a philosophy used by Thomas Edison.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

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