Measure width of a single character - C / C++ / MFC Discussion Boards

Re: Having some problems, and it may be a pointer issure

kuroiryu26-Apr-06 14:16

kuroiryu

26-Apr-06 14:16

that gives Error error C2664: 'screen::addCube' : cannot convert parameter 1 from 'cube' to 'cube *'

Re: Having some problems, and it may be a pointer issure

ankita patel26-Apr-06 14:20

ankita patel

26-Apr-06 14:20

Sorry, I didn't see that you had static Array declaration for the cubeSet.

so you are saying some of the values being dispalyed are incorrect, but not all? could you post some more detailed code?

Ankita

Re: Having some problems, and it may be a pointer issure

Nibu babu thomas26-Apr-06 18:46

Nibu babu thomas

26-Apr-06 18:46

You have not initialized the cubes properly.

Nibu thomas
Software Developer

Re: Having some problems, and it may be a pointer issure

kuroiryu27-Apr-06 5:20

kuroiryu

27-Apr-06 5:20

how should i initialize cubeSet?

My loop goes like this.

cubeSet[i] = cube(); //cube::cube() is the constuctor
.
.
change side colors
.
.
screens[i].addCube(&cubeSet[i]);//ad cube to screen one cube to each screen

Then later in draw func

for(int i = 0;i<4;i++){
screens[i].draw();
}

Screen obj holds the cube in a node
and eventually calls drawNode->cubeItem->draw();

then when in the draw function during debuging i see that some of the cubes info is off
even though back in the setup function the info looked good.

thanks for the help
joe

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

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