Having some problems, and it may be a pointer issure - C / C++ / MFC Discussion Boards

A little different !!!

M_Nuaimi27-Apr-06 14:30

M_Nuaimi

27-Apr-06 14:30

i changed all to double, but the problem still appear, it shows now 3516408 instead 500 Sigh | :sigh:

Ryan may you tell me please about what you usually use instead of CDBVariant?

thanks to all for attention Wink | ;)

Re: A little different !!!

Ryan Binns27-Apr-06 19:25

Ryan Binns

27-Apr-06 19:25

I generally use COleVariant or just a plain VARIANT structure.

You mustcheck the type of data thats in the CDbVariant. Check the m_dwType field to determine the type of data - that is the only way you'll know which data member to use.

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"

About MDI step debug in vs2003

zhoucheng26-Apr-06 15:04

zhoucheng

26-Apr-06 15:04

I need some help,could you help me?

In my program ,I create a other frame by myself:
pFrame = theApp.m_pDrawDocTemplate->CreateNewFrame(this, NULL);
theApp.m_pDrawDocTemplate->SetDefaultTitle(this);
pFrame->SetParent (NULL);
theApp.m_pDrawDocTemplate->InitialUpdateFrame(pFrame, this, TRUE);

the frame work well,but I can't debug it in step mode(the break point can't work).

this is all

Re: About MDI step debug in vs2003

Ryan Binns26-Apr-06 16:16

Ryan Binns

26-Apr-06 16:16

Where did you put the breakpoint?

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: About MDI step debug in vs2003

zhoucheng26-Apr-06 20:20

zhoucheng

26-Apr-06 20:20

I put the breakpoint in OnDraw() event of the view (in the first line).but when run to here ,
the program will dead.
And if set the breakpoint in the menu event,the program will not response it.

Need a class to display normal text and hyperlinks

Defenestration26-Apr-06 13:30

Defenestration

26-Apr-06 13:30

I'm after a control like the one shown in this image. I'm considering putting a hyperlink control in a static text control, but was wondering if someone has already written such a non-MFC class ?

http://img136.imageshack.us/img136/9983/customcontrolwithcustomisableh.png

The control should have the following features:

1) allows you to mix normal text with hyperlink text (ie. blue in the screenshot).
2) mouse cursor should change to hand cursor when over link
3) should be possible to indent lines and long lines should wrap onto a new line if too long
4) text should not be selectable (although it would be nice if this could be enabled/disabled)
5) No text cursor should be displayed
6) should be dynamically resizable
7) Vertical scrollbar should be enabled and allow to scroll if there are too many lines

Does anyone know of an existing non-MFC class which can do this ?

Also, I'm considering using WTL (although not definite) and was wondering if it has an in-built class like this ?

-- modified at 19:31 Wednesday 26th April, 2006

Re: Need a class to display normal text and hyperlinks

Nibu babu thomas26-Apr-06 17:16

Nibu babu thomas

26-Apr-06 17:16

Make one or Buy one! Thats the easiest way. Smile | :)

Nibu thomas
Software Developer

Having some problems, and it may be a pointer issure

kuroiryu26-Apr-06 13:04

kuroiryu

26-Apr-06 13:04

bool screen::addCube(cube* newCube)

screens[i].addCube(&cubeSet[i]);

Is there anything wrong with the way i have all the function.
I the screen obj has builds a linked list of displayable obj, well just my cubes really.
But later when draw gets called the some of the values of the cube from cubeSet are incorrect or null and the program halts.

The program starts with declarations,
cube cubeSet[4];
screen screens[4];

please help,
thanks

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

ankita patel26-Apr-06 13:39

ankita patel

26-Apr-06 13:39

Try this:

screens[i].addCube(cubeSet[i]);

Ankita

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.

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