C / C++ / MFC Discussion Boards

Re: help on Window Painting

uday kiran janaswamy1-Aug-06 23:33

uday kiran janaswamy

1-Aug-06 23:33

hi appu,

i tried but it is showing the DeskTop items also into my view.

It become a TrasparentWindow.

Uday kiran

Re: help on Window Painting

Parthi_Appu1-Aug-06 23:39

Parthi_Appu

1-Aug-06 23:39

Try painting your controls in OnPaint() instead of OnDraw() and handle the erase back ground message

Do your Duty and Don't expect the Result

Re: help on Window Painting

uday kiran janaswamy2-Aug-06 0:05

uday kiran janaswamy

2-Aug-06 0:05

hi appu,

I have tried but i am not getting it. i tried with paint also even then it is showing the desktop backgroud.

please give me a snippet of code

Uday kiran

Re: help on Window Painting

Parthi_Appu2-Aug-06 1:38

Parthi_Appu

2-Aug-06 1:38

Sorry then i have no idea.. actually i saw one application which handles the WM_ERASEBKGND message and return TRUE and it is commented stating to avoid flickering... thats why i suggest it to you..

Do your Duty and Don't expect the Result

Re: help on Window Painting

Hamid_RT2-Aug-06 9:10

Hamid_RT

2-Aug-06 9:10

Do you have problem with OnPaint?

WhiteSky

Re: help on Window Painting

Optimus Chaos2-Aug-06 21:14

Optimus Chaos

2-Aug-06 21:14

Can you provide a code snippet with the drawing code?

Accelerator question. [modified]

Anu_Bala1-Aug-06 23:09

Anu_Bala

1-Aug-06 23:09

Hi, in my dialog i have one button "Item" by pressing this button second dialog will appear.
I need short cut key for opening this second dialog.
So i placed one accelerator for the ID of that second dialog (i.e)IDD_ITEM_DLG as ctrl I. And coded for this ID in mainframe class as Onitemdlg().But when i press ctrl I in my keyboard it does not works.
So, i made the same thing for that particular button in first dialog and coded in that first dialog class as the same .That time also it never works.
How can i do this?
P.S:when i write property for item button (i.e)&Item,
but in ouptput dialog nothing is display under I letter.

-- modified at 5:12 Wednesday 2nd August, 2006

Anu

Re: Accelerator question.

David Crow2-Aug-06 3:50

David Crow

2-Aug-06 3:50

Have you called LoadAccelerators().

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Re: Accelerator question.

Hamid_RT2-Aug-06 8:58

Hamid_RT

2-Aug-06 8:58

See Here[^] and Here[^]maybe it is some helpful to you

WhiteSky

Help on Drawing Ellipse(..)

uday kiran janaswamy1-Aug-06 22:41

uday kiran janaswamy

1-Aug-06 22:41

hi all,

i have drawn a ellipse in the View using CDC::Ellipse(...),
but when i double click the mouse i dont want to see the ellipse what i have drawn in the mouse previously.

please give me a solution.

Uday

Re: Help on Drawing Ellipse(..)

Hamid_RT1-Aug-06 22:47

Hamid_RT

1-Aug-06 22:47

please see Invalidate

WhiteSky

Re: Help on Drawing Ellipse(..)

uday kiran janaswamy1-Aug-06 23:05

uday kiran janaswamy

1-Aug-06 23:05

hi whitsky,

you have told to use invalidate, which will paint the entire window, but here once i have double click with the mouse i will genereate a Circle where i clicked and it must erase the first circle where i created.

sinario :
---------

first i created a Circle and double click any where in the screen
then at the double click a same circle what i have generated first it must created and the first created circle must disappear.

please help me out.

Uday kiran

Re: Help on Drawing Ellipse(..)

Sarath C1-Aug-06 22:53

Sarath C

1-Aug-06 22:53

CDC* pDC = GetDC();
dc->BeginPath()
dc->Ellipse(0,0,100,50);

See MSDN for more details.

SaRath.

"Where I am from, there is no plan B. So, take advantage of today becuase tomorrow is not promised. - 50 Cent"

My Blog | Understanding State Pattern

Re: Help on Drawing Ellipse(..)

uday kiran janaswamy2-Aug-06 0:20

uday kiran janaswamy

2-Aug-06 0:20

hi sarath,

you have told to use invalidate, which will paint the entire window, but here once i have double click with the mouse i will genereate a Circle where i clicked and it must erase the first circle where i created.

sinario :
---------

first i created a Circle and double click any where in the screen
then at the double click a same circle what i have generated first it must created and the first created circle must disappear.

please help me out.

Uday kiran

Uday kiran

Re: Help on Drawing Ellipse(..)

Sarath C2-Aug-06 0:47

Sarath C

2-Aug-06 0:47

Add member member variables

protected:
	int m_nXPos;
	int m_nYPos;

Initialize them to some default values in ctor say 25 and 50

in OnPaint Function

dc.Ellipse(m_nXPos - 50,m_nYPos -25,m_nXPos + 50,m_nYPos +25);

make sure that this call after appears only after CDialog::OnPaint();

In double click handler do the following...

void CSampleDialogDlg::OnLButtonDblClk(UINT nFlags, CPoint point)
{
	// give default values
	m_nXPos = 50;
	m_nYPos = 25;

	if( point.x > 50) // check for minimum value
		m_nXPos = point.x;

	if( point.y > 25) // check for minimum value
		m_nYPos = point.y;

	InvalidateRect();

	CDialog::OnLButtonDblClk(nFlags, point);
}

Hope this works...
for avoiding flickering you may have to use double buffering technique.

SaRath.

"Where I am from, there is no plan B. So, take advantage of today becuase tomorrow is not promised. - 50 Cent"

My Blog | Understanding State Pattern

Re: Help on Drawing Ellipse(..)

Sachin M Narangale2-Aug-06 6:36

Sachin M Narangale

2-Aug-06 6:36

Hi, friend.
I think using Invalidate() in the mouse double click event can solve the problem. I will check and convey you.

Sachin M Narangale

VC++ can make everything...if we mould it properly!

MCA
9860019526

Re: Help on Drawing Ellipse(..)

Hamid_RT2-Aug-06 8:50

Hamid_RT

2-Aug-06 8:50

I said to uday kiran janaswamy this function but it seems its not good for his program

WhiteSky

GUI technologies

A_Fa1-Aug-06 22:29

A_Fa

1-Aug-06 22:29

Hi all friends .

Is any technology for developing graphics program (GUI programming) faster than DirectDraw ?

Thank in advance .

Re: GUI technologies

Hamid_RT1-Aug-06 22:33

Hamid_RT

1-Aug-06 22:33

You asked this question yesterday

WhiteSky

Re: GUI technologies

toxcct1-Aug-06 22:37

toxcct

1-Aug-06 22:37

repost[^]

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: GUI technologies

ThatsAlok2-Aug-06 0:42

ThatsAlok

2-Aug-06 0:42

toxcct wrote:
repost[^]

give him GOOGLE DEATH!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Re: GUI technologies

toxcct2-Aug-06 1:37

toxcct

2-Aug-06 1:37

here[^]

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: GUI technologies

Sarath C1-Aug-06 22:47

Sarath C

1-Aug-06 22:47

what do you mean by GUI technology...
There are different type of framework implementations like DirectX(3D), GDI,GDI+, OpenGL(3D).
For implementing GUI or design a UI normally you can use GDI or GDI+. it's fast enough.

AFAIK GDI+ and DirectX are based on COM which is language independent.

SaRath.

"Where I am from, there is no plan B. So, take advantage of today becuase tomorrow is not promised. - 50 Cent"

My Blog | Understanding State Pattern

CEdit HowTo react on changed Selection?

whiteman761-Aug-06 22:04

whiteman76

1-Aug-06 22:04

Hello all,

Yesterday I've taken all the day to search for a solution to this problem but couldn't find one. Hopefully one of you can hint me in the right direction.

What I'm trying to do is the following.

A selectable text like you can find it in the file properties of windows explorer. Additional this control should be able to draw different fonts/colors after each whitespace.
I tried to realize this with a CEdit derived class in which I used OnPaint to draw the colored text.

The Problem is that whenever the selection is changed either by Mouse or Keyboard the CEdit seems to use alternative drawing routines and therefore overwrite my colored text.
So I tried ON_CONTROL_REFLECT for the messages EM_SETSEL and EN_SELCHANGE. I need to handle this message directly in the control not in the parent class. I also tried the other reflection handlers because I wasn't sure if ON_CONTROL_REFLECT is the right one here. Unfortunately there is no real documentation about CEdit messages in MSDN. I also searched alot in google groups and on the developer sites like this and codeguru but didn't find any hint.

So can anyone help me and tell me how I can react on a changed selection in the CEdit or if this is possible at all? The control would be finished if I could handle the changed selection because I would be able to draw only the non-selected parts of the control. But if I don't find a way to handle this I'd have to take a whole new approach to the problem and use a different control.

Thx for any help,
whiteman

Re: CEdit HowTo react on changed Selection? [modified]

Naveen1-Aug-06 22:15

Naveen

1-Aug-06 22:15

dear whiteman,

I too had a similar problem some months before. But after lots of experiments failed to do. I also asked the same question in CP.
see http://www.codeproject.com/script/comments/forums.asp?msg=1370028&forumid=1647&XtraIDs=1647&searchkw=Selection+color&sd=5%2F4%2F2005&ed=8%2F2%2F2006#xx1370028xx[^]

nave

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