C / C++ / MFC

Re: How we change the shape of the Button

4-Jul-06 23:28

See Irregular shaped buttons – owner drawn buttons made easy
[^] maybe it is some helpful to you

whitesky

ANIL KUMAR SHARMA (INDIA)14-Jul-09 19:12

ANIL KUMAR SHARMA (INDIA)

14-Jul-09 19:12

The question is slightly deviated but related to buttons and dynamic control, so hope i get some clue.
I like to autosize the owner draw button depending upon the text that it load dynamically based on localization strings. so some strings are large than others. Keeping this I override DrawItem in the inherited class from CButton.
The sample code is below

void CMyGraphicButton::DrawItem (LPDRAWITEMSTRUCT lpDrawItemStruct)
{
CString cs;
CString cslong;
ASSERT(lpDrawItemStruct->CtlType == ODT_BUTTON);
LPCTSTR lpszText = (LPCTSTR) lpDrawItemStruct->itemData;
if (!lpszText || lpszText == (LPCTSTR)-1)
{
GetWindowText (cs);
}
else
cs = lpszText;

// now i m trying to resize , so let try to increase the size of button unconditioally
// I get
//lpDrawItemStruct>rcItem.left =0
//lpDrawItemStruct>rcItem.right =75
//lpDrawItemStruct>rcItem.top = 0
//lpDrawItemStruct>rcItem.bottom = 25
//As my button is on extreme right side of dialog so i tried to extend/increase the size of
// button of the left side as follows

lpDrawItemStruct>rcItem.left -= 25 ;

// but the above causes the text to be moved on right side insead of resize/increase the
//button size.

Any idea or help is appriciated.

Thanks
Anil

}

[AKS]

Device Context.

voorugonda prashanth4-Jul-06 23:11

voorugonda prashanth

4-Jul-06 23:11

why CPaintDC not used in other than OnPaint()?

Re: Device Context.

Sarath C4-Jul-06 23:34

Sarath C

4-Jul-06 23:34

for a WM_PAINT messaege we do the drawings withing BeginPaint and EndPaint.

CPaintDC calls BeginPaint at construction time and EndPaint at destruction time.

From MSDN:
CPaintDC objects encapsulate the common idiom of Windows, calling the BeginPaint function, then drawing in the device context, then calling the EndPaint function. The CPaintDC constructor calls BeginPaint for you, and the destructor calls EndPaint. The simplified process is to create the CDC object, draw, and destroy the CDC object. In the framework, much of even this process is automated. In particular, your OnDraw function is passed a CPaintDC already prepared (via OnPrepareDC), and you simply draw into it. It is destroyed by the framework and the underlying device context is released to Windows upon return from the call to your OnDraw function.

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."

My Blog | Understanding State Pattern in C++

Re: Device Context.

voorugonda prashanth4-Jul-06 23:40

voorugonda prashanth

4-Jul-06 23:40

hi sarath,

why it is not working if i use CPaintDc in onLButtonDown()?

Re: Device Context.

Hamid_RT4-Jul-06 23:53

4-Jul-06 23:53

Now again i use from MSDN
From the MSDN
The CPaintDC class is a device-context class derived from CDC

whitesky

Button problem

ashish dogra4-Jul-06 22:46

4-Jul-06 22:46

hi all plz tell me with example plz.........
i have a question in four parts:-

i want to know how
1)i can change the style of button ,
2)a picture or like this is placed on button,
3)and can a button is placed on title bar.
4)change the color of button and its text
plz tell me example for this its a request......
plz...........

Ashish Dogra
MCA
Noida

Hamid_RT4-Jul-06 22:50

4-Jul-06 22:50

You can derived CButton class and use WM_DRAWITEM in this event you cahnge color and or draw one bitmap on button with dc handle

whitesky

ashish dogra4-Jul-06 22:55

4-Jul-06 22:55

sir can you give some example which clear this

Ashish Dogra
MCA
Noida

Hamid_RT4-Jul-06 23:05

4-Jul-06 23:05

set OwnerDraw from Button to true in property window and include AtlImage.h

class CMyButton : public CButton
{
public:
	CMyButton();
	virtual ~CMyButton();
protected:
	virtual void DrawItem( LPDRAWITEMSTRUCT lpDrawItem );

	DECLARE_MESSAGE_MAP()
public:
	afx_msg void OnClose();
	CImage m_Image;
};



CMyButton::CMyButton()
{
	m_Image.Load("d:\\0.bmp");
		
}

CMyButton::~CMyButton()
{
}

BEGIN_MESSAGE_MAP(CMyButton, CButton)

END_MESSAGE_MAP()


void CMyButton::DrawItem(LPDRAWITEMSTRUCT  lpDrawItem) 
{
	CDC			dc;
	CString		Str;
	CRect		Rect(lpDrawItem->rcItem);

	dc.Attach(lpDrawItem->hDC);
	GetWindowText(Str);
	dc.SetBkMode(0);

		if ( (lpDrawItem->itemState& ODS_SELECTED) )
				{
		dc.FillRect(Rect,&CBrush(RGB(255,255,255)));
		dc.FrameRect(Rect,&CBrush(RGB(0,0,255)));

		dc.SetTextColor(RGB(0,0,0));
		dc.DrawText(Str,Rect,DT_CENTER|DT_SINGLELINE);
				}
	else
		{
		dc.FillRect(Rect,&CBrush(RGB(53,97,200)));
		dc.FrameRect(Rect,&CBrush(RGB(0,0,0)));
		dc.SetTextColor(RGB(255,255,255));
		dc.DrawText(Str,Rect,DT_CENTER|DT_SINGLELINE);
		}
		//BitBlt(dc.m_hDC,0,0,800,600,m_Image.GetDC(),0,0,SRCCOPY);
	dc.Detach();
}

</code>

whitesky

ashish dogra4-Jul-06 23:25

4-Jul-06 23:25

SIR I WANT TO TELL YOU HOW I MDE MY APPLICATION PLZ HELP ME

SIR I MADE AN DIALOG BASED APPLICATION NOW A DIALOG IS AUTOMATICALLY THERE SO I PUT ONE BUTTON ON IT.
ITS CLASS IS CBTNCOLORDLG AND IT IS DERIVED FROM CDIALOG
NOW AS YOU SAY
I MADE ANOTHER CLASS FROM INSERT MENU ->NEW CLASS AND THEN A BOX IS OPENED ON WHICH I USE MFC AS CLASSTYPE,
CMY AS NAME AND ITS BASE CLASS AS CBUTTON.
NOW I USE CLASS WIZARD TO ADD ONDRAWITEM FUNCTION THEN I USE THE CODE AS YOU SEND ,
BUT NOTHING HAPPEN

NOW TELL ME WHEATHER I DECLARE ALL THIS IN RIGHT DIRECTION OR NOT
PLZ TELL ME ...

Ashish Dogra
MCA
Noida

ashish dogra4-Jul-06 23:47

4-Jul-06 23:47

SIR PLZ I ASK U AGAIN
PLZ..... HELP ME

Ashish Dogra
MCA
Noida

Hamid_RT5-Jul-06 0:00

Re: Button problem [modified]

5-Jul-06 0:00

you asked me and i see but you need to read six paragraph from Chris Maunder
You need to copy this code to your program and it work its not hard You can insert one button n your dialog and declare a variable for this button from type this class CMyButton not button and se BS_OWNERDRAW to true for button now you can see affect
for exmpale

<br />
(1)CMyButton m_Button;<br />
Button.ModifyStyle(0,BS_OWNERDRAW)<br />

whitesky

ashish dogra5-Jul-06 0:38

5-Jul-06 0:38

thanks sir
it works but sir the text on it is btncolor
even the text on it is click
how can i change it
and sir when i declare anoter variable of type CButton to change font it does not work

Ashish Dogra
MCA
Noida

-- modified at 6:47 Wednesday 5th July, 2006

Hamid_RT5-Jul-06 1:55

5-Jul-06 1:55

What do you nedd exactly?

whitesky

ashish dogra5-Jul-06 2:17

5-Jul-06 2:17

sir i want to change the font of the text as with its color
but if i try to change the font it does not happen

Ashish Dogra
MCA
Noida

Hamid_RT5-Jul-06 2:59

5-Jul-06 2:59

See

<br />
	CFont m_Font;<br />
	m_Font.CreateFont(...);<br />
	m_YourControl.SetFont(&m_Font);<br />

whitesky

what it mean in C++-> TCHAR

_AnsHUMAN_ 4-Jul-06 23:06

_AnsHUMAN_

4-Jul-06 23:06

1)Yes we can change the style of the button. Make it owner draw etc.
2)You can derive a class from CBitmapButton and then put an image in the button
3)yes a button can be place in the title bar (we have minimize, close buttons over there)
4) yes the button of the color and its text can be changed

You can derive a class for the button from CBitmapButton and use LoadBitmap function to load the picture on the button.
You can change the text using the SetWindowText etc
I hope that I made myself clear

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

_AnShUmAn_

Nirmal Khatri4-Jul-06 22:39

Nirmal Khatri

4-Jul-06 22:39

TCHAR IncompleteFilePath[MAX_PATH];;

What it mean???

Re: what it mean in C++-> TCHAR

Sarath C4-Jul-06 22:48

Sarath C

4-Jul-06 22:48

See TCHAR is defined as follows

#ifdef UNICODE
typedef WCHAR TCHAR;
#else
typedef char TCHAR;

max path is the sum of

_MAX_DIR + _MAX_DRIVE + _MAX_EXT + _MAX_FNAME + _MAX_PATH

it means that there's is char(if ASCII) or wchar_t (if Unicode) array of size MAX_PATH

you can see these definitions, if you press F12 after selecting the requried definition (e.g TCHAR)

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."

My Blog | Understanding State Pattern in C++

Re: what it mean in C++-> TCHAR

Hamid_RT4-Jul-06 22:51