C / C++ / MFC

Editbox flickering problem

26-Jul-06 22:09

mikobi wrote:
I try the same for a button, it don't work :

for button it will not work. If u want to change the color of the button, u have to Draw it by ur self. This can be done by giving(BS_OWNERDRAW) style to the button. U can find enough articles explaining this. Try googling Owner Draw Button.

nave

Char Array question

HakunaMatada26-Jul-06 21:00

HakunaMatada

26-Jul-06 21:00

Supposing I declare a char array like

char p[20] = {"Hello"} ;

Where will this array of chars get created? In the Heap or the Stack? When the function where this array is declared goes out of scope, will the char array be automatically deleted or will I have to explicitly delete it?

---

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Re: Char Array question

sunit526-Jul-06 21:14

sunit5

26-Jul-06 21:14

it is created in the stack and it will be deleted automatically

never say die

Re: Char Array question

NrmMyth27-Jul-06 6:17

NrmMyth

27-Jul-06 6:17

Everything is allocated on stack unless you explicitly allocate with new, malloc, realloc...

Re: Char Array question

softwaremonkey27-Jul-06 9:02

softwaremonkey

27-Jul-06 9:02

or if its global Wink | ;)

LaHaHa26-Jul-06 20:23

26-Jul-06 20:23

When I try to use setdlgitemtext to place some text into the EDIT box,
it will cause the flickering problem. Is there any method to solve it?
Please help! Many thanks!

Steve Echols26-Jul-06 20:45

Steve Echols

26-Jul-06 20:45

You could try SetRedraw(false), update your control's text, then SetRedraw(true), then Invalidate the control. Not sure if it has any affect on edit controls, but works for tree and list controls.

- S
50 cups of coffee and you know it's on!

LaHaHa26-Jul-06 21:46

26-Jul-06 21:46

Thank you very much!
But it is still the same!

Naveen26-Jul-06 21:59

26-Jul-06 21:59

From which funtion do u call SetDlgItemText()?

I think the flicker is coming because u call that funtion frequently?

nave

LaHaHa26-Jul-06 22:36

26-Jul-06 22:36

The function is called by pressing a button.
So it should not happened frequently.

Naveen26-Jul-06 22:40

26-Jul-06 22:40

can u show me the code inside that function?

nave

LaHaHa26-Jul-06 22:47

26-Jul-06 22:47

The coding are
function()
{
display=DEPARTMENT;
count=temp;
itoa(count,num_tmp,10);
display+=num_tmp;
SetDlgItemText(IDC_EDIT2,display);
}

HBRUSH CQcountDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
{
HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

// TODO: Change any attributes of the DC here
switch (nCtlColor)
{
case CTLCOLOR_STATIC: switch (pWnd->GetDlgCtrlID())
{
case IDC_EDIT2: pDC->SetTextColor(_TEXTCOLOR);
pDC->SetBkColor(_TEXTBKGCOLOR);
hbr=_NumBkgBrush;
break;
default: pDC->SetBkColor(_BkgColor);
hbr = _BkgBrush;
}
break;
default: pDC->SetBkColor(_BkgColor);
hbr = _BkgBrush;
}
// TODO: Return a different brush if the default is not desired
return hbr;
}

Naveen26-Jul-06 23:00

26-Jul-06 23:00

I found nothing wrong with this code. But just try commenting the ON_WM_CTLCOLOR() in the message map. Have u mapped any other painting messages like this?

nave

LaHaHa27-Jul-06 3:19

27-Jul-06 3:19

There are no other such mapping!

Steve Echols27-Jul-06 6:36

Steve Echols

27-Jul-06 6:36

Maybe it's flickering because the text is selected? Could try SetSel(0, 0) and then set your text.

- S
50 cups of coffee and you know it's on!

LaHaHa27-Jul-06 18:02

27-Jul-06 18:02

Thank you very much!
But still the same!

Steve Echols27-Jul-06 19:16

Steve Echols

27-Jul-06 19:16

After further thought, the standard edit box is not double buffered, so it erases the background and then draws the text, so I think that's why it's flickering. I'm not sure how to fix it.

- S
50 cups of coffee and you know it's on!

LaHaHa27-Jul-06 22:25

how to add functionality in minimize/maximize button

27-Jul-06 22:25

Anyway! Thank you very much!

uetiean26-Jul-06 20:22

uetiean

26-Jul-06 20:22

i want to add some functionality to maximize minimize button of a dialog or form view. how can i do this?

Re: how to add functionality in minimize/maximize button

_AnsHUMAN_ 26-Jul-06 20:31

_AnsHUMAN_

26-Jul-06 20:31

uetiean wrote:

functionality to maximize minimize button of a dialog

Override WM_SIZE
In the OnSize function

if(nType==SIZE_MINIMIZED)
	//Do Something when MINIMIZED
        
if(nType==SIZE_MAXIMIZED )
	//Do Something when MAXIMIZED

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: how to add functionality in minimize/maximize button

Hamid_RT26-Jul-06 20:44

Hamid_RT

26-Jul-06 20:44

See Here[^]

WhiteSky

Re: how to add functionality in minimize/maximize button [modified]

see me26-Jul-06 20:48

see me

26-Jul-06 20:48

Overide

WM_NCLBUTTONDOWN()<br />
<br />
void OnNcLButtonDown( UINT nHitTest, CPoint point )<br />
{<br />
    if( nHitTest == HTMINBUTTON )<br />
    {<br />
        AfxMessageBox( "MinButton" );<br />
    }<br />
    if( nHitTest == HTMAXBUTTON )<br />
    {<br />
        AfxMessageBox( "MaxButton" );<br />
    }<br />
    CDialog::OnNcLButtonDown( nHitTest, point );<br />
}

GetTextExtent() on asian edition

bsmk197826-Jul-06 20:10

bsmk1978

26-Jul-06 20:10

CWnd::GetTextExtent() or CWnd::GetOutputTextExtent() does not return the correct width of the text in asian languages OS on Windows 2K. The same works as expected on Windows XP.

I have seen this with GetWindowText() also. Does anyone know or seen this issue. What is the reliable way to correct this.

Best Regards, Madhu.

Re: GetTextExtent() on asian edition

Naveen26-Jul-06 20:52