Re: adding controls in onpaint - C / C++ / MFC Discussion Boards

Re: Question ...

HakunaMatada16-Mar-06 0:09

HakunaMatada

16-Mar-06 0:09

Thanks...

---
With best regards,
A Manchester United Fan

The Genius of a true fool is that he can mess up a foolproof plan!

adding controls in onpaint

Tarek Jabri15-Mar-06 23:03

Tarek Jabri

15-Mar-06 23:03

Hi i am working with mfc.
in the onpaint in a cdialog, i need to draw some shapes and for each i need to add a button to it. the user can add more of this shapes and also for each new shape there is a button
i was able to create the button in onpaint but clicking it causes the app to freeze
is there any solution for this, or any other approach for adding the button

thanks alot

Re: adding controls in onpaint

Cedric Moonen15-Mar-06 23:09

Cedric Moonen

15-Mar-06 23:09

Waw, this is... bad ! You know that OnPaint will be called each time the app needs to be refreshed ? So for example, a windows comes before your app and then disapear, then OnPaint will be called again. Thus you will create new buttons over and over again... This is crazy.
You should create the buttons once only, at the creation of the window.

Re: adding controls in onpaint

Hamid_RT15-Mar-06 23:19

Hamid_RT

15-Mar-06 23:19

excuse me
you draw some shapes and you create buttons in the WM_PAINT and when you click in the button they are freeze.
buttons are controls for shapes?

you can once buttons and use them
I think Its not good create button in wm_paint

Re: adding controls in onpaint

Tarek Jabri15-Mar-06 23:38

Tarek Jabri

15-Mar-06 23:38

I know that creating controls in wm_paint is bad and crazy and waw.
Each shape on the dialog has a button (drawn inside the shape) to do some action on the shape.
but lets suppose that i have one shape now, and i created its button outside the wm_paint.
now in run_time the user will add new shape,
but how i ll create a new button to associate with the new shape?

Re: adding controls in onpaint

toxcct15-Mar-06 23:58

toxcct

15-Mar-06 23:58

member variable ?!

Re: adding controls in onpaint

Hamid_RT16-Mar-06 0:02

Hamid_RT

16-Mar-06 0:02

I suggestion
Use HWND hwnd[20];

if user will add new shape then user use WM_LBUTTONDOWN
and you can then create button if you need use handle button in the onpaint

Re: adding controls in onpaint

Maximilien16-Mar-06 3:01

Maximilien

16-Mar-06 3:01

I think you need to re-think your design; you simply cannot create controls in the OnPaint.

in your main view, you will draw an OBJECT.

that OBJECT will be a class ( CWnd derived ) that will take care of creating/owning its Button and drawing the shape.

for example, a rough implementation :

 /// in that class you will create a button, and use the OnPaint to draw the shape.
class CButtonShape : public CWnd
{
	DECLARE_DYNAMIC(CButtonShape)
	
	CBrush m_Brush;
	CButton m_Button;
public:
	CButtonShape();
	virtual ~CButtonShape();

protected:
	DECLARE_MESSAGE_MAP()
public:
	afx_msg void OnPaint();
	afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
};

and use the view to create and display that class ( or many as you wish ).

Maximilien Lincourt
Your Head A Splode - Strong Bad

Why font size is specified as 8, 10, 12, 14...

Nishad S15-Mar-06 22:38

Nishad S

15-Mar-06 22:38

Hi all,

Do anybody know why the font size is normally said as 8, 10, 12, 14, 16, 18, 20, 24, 36, 48, etc?
Is there any speciality for these numbers?

- NS -

Re: Why font size is specified as 8, 10, 12, 14...

C^hris L^osinger16-Mar-06 2:07

C^hris L^osinger

16-Mar-06 2:07

they are the common font sizes used for centuries in the printing industry.

Cleek | Image Toolkits | Thumbnail maker

Re: Why font size is specified as 8, 10, 12, 14...

Nishad S16-Mar-06 16:19

Nishad S

16-Mar-06 16:19

This is a new knowledge to me.
Thanks a lot. Big Grin | :-D

- NS -

ListView in vc++ 6.0

pankajgarg1215-Mar-06 22:10

pankajgarg12

15-Mar-06 22:10

I am displaying the directories and files in ListView on clicking the treeview node.But on clicking the listview item
it does not shows the subitems in listview.

Can somebody please send the any link or code ?

Re: ListView in vc++ 6.0

toxcct15-Mar-06 22:23

toxcct

15-Mar-06 22:23

CListView[^] Mad | :mad:

Enough spam[^] Suspicious | :suss:

How to test TCP/IP connection on the client-side?

RoseAl15-Mar-06 21:57

RoseAl

15-Mar-06 21:57

How to test TCP/IP connection on the client-side? Some software needed (Win32).

Thanks

Rose

Re: How to test TCP/IP connection on the client-side?

Dathan Tseng15-Mar-06 21:59

Dathan Tseng

15-Mar-06 21:59

I like this tool: http://www.protodevelopment.com/en/index.html

Re: How to test TCP/IP connection on the client-side?

sunit515-Mar-06 22:07

sunit5

15-Mar-06 22:07

http://www.codeproject.com/internet/winsockintro02.asp[^]

never say die

Printers !!!

vikramlinux15-Mar-06 21:47

vikramlinux

15-Mar-06 21:47

Hi friends
Please look at following questions.
1) Can I get list of printers and print servers from active directory. If yes how?

2) Can I monitor printer jobs for a shared printer installed on some different machine.

3) Can I abort above kind of jobs

4) Can I modify above kind of printer jobs and add watermark or user name?

Thanx

VikramS

insert char into buffer

beardy janggut15-Mar-06 21:25

beardy janggut

15-Mar-06 21:25

i'm using fread to read a file ,and get all the characters in file into a buffer.

char buffer1[nfilelength];
numread=fread(buffer,sizeof(char),1,"text1.txt");

then when i compile, an error occured need me to put a constant integer in declaration of char buffer[], how can i do coz the file length is dynamic.

HelpMe

Re: insert char into buffer

kakan15-Mar-06 21:32

kakan

15-Mar-06 21:32

Allocate buffer1 with new.
And don't forget to delete it, later.

Re: insert char into buffer

sunit515-Mar-06 21:45

sunit5

15-Mar-06 21:45

rather than putting nfilelength in buffer1[] put some value say buffer1[512]

never say die

Re: insert char into buffer

Nishad S15-Mar-06 22:47

Nishad S

15-Mar-06 22:47

To specify an array with dynamic size, you should allocate it dynamically.
eg.

char* buffer1 = new char[nfilelength];
// read the file.
// do other thing that you need.
delete [] buffer1;

But I think there is a logical mistake in your code. You read only one char from the file using fread. If you intended to do so then you don't have to give any array.
If not you should specify the size as nfilelenght or sizeof(char)*nfilelength instead of sizeof(char).

- NS -

TreeView in vc++ 6.0

pankajgarg1215-Mar-06 21:12

pankajgarg12

15-Mar-06 21:12

What is the difference between ItemExpanding and ItemExpanded in treeview ?

Thanks Smile | :)

Re: TreeView in vc++ 6.0

Nibu babu thomas15-Mar-06 21:18

Nibu babu thomas

15-Mar-06 21:18