C / C++ / MFC Discussion Boards

Russell^'6-Aug-07 23:56

6-Aug-07 23:56

To know the colors used you can use ReadConsoleOutput.
To know tho cursor position I think you can use GetConsoleSelectionInfo.

Russell

Re: stdout

baerten7-Aug-07 3:22

baerten

7-Aug-07 3:22

Big thanks!

It works great, but not with PDCurses Sigh | :sigh:

Catching the 'End Task' Event

Programm3r6-Aug-07 22:04

Programm3r

6-Aug-07 22:04

Hi all,

How can one catch the event of the 'End Task', generated from the task manager window? Why do I want to know, to prevent users from closing certain applications.

Thanks in advance
Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: Catching the 'End Task' Event

Jonathan [Darka]6-Aug-07 23:28

Jonathan [Darka]

6-Aug-07 23:28

I think you'll find it impossble to stop the user unless they don't have permissions to end the task, have you thought about making you application a Service ?

Jonathan Wilkes
Darka[Xanya.net]

Re: Catching the 'End Task' Event

jk chan7-Aug-07 0:03

jk chan

7-Aug-07 0:03

I know there is a WM_QUERYENDSESSION message which will occured during shutdown.
Smile | :)

If u can Dream... U can do it

how to change the device context for a status bar

BlrBoy6-Aug-07 21:35

BlrBoy

6-Aug-07 21:35

Hello All..

I am trying to draw a bitmap as background for the status bar. I have derived my own status bar from CStatusBar. When I try to override OnPaint ().. it erases the default status bar messages and panes.. I tried to change the Device Context on OnCreate () and OnNCPaint () both are not working here is the code.

<br />
void CMyStatusBar::OnNcPaint()<br />
{<br />
   CDC* pdc= GetWindowDC();<br />
<br />
    CDC memdc;    <br />
    memdc.CreateCompatibleDC(pdc);    <br />
    memdc.SelectObject(m_hBmp);    <br />
    pdc->BitBlt(0, 0, <br />
        m_rectLogo.Width(), <br />
        m_rectLogo.Height(), <br />
        &memdc, 0, 0, SRCCOPY);    <br />
<br />
    ReleaseDC(pdc);    	<br />
}<br />
<br />
int CMyStatusBar::OnCreate(LPCREATESTRUCT lpCreateStruct)<br />
{<br />
	if (CStatusBar::OnCreate(lpCreateStruct) == -1)<br />
		return -1;<br />
<br />
	m_hBmp = (HBITMAP)LoadImage(AfxGetInstanceHandle(), <br />
           MAKEINTRESOURCE(IDB_BKCOLOR_BMP), IMAGE_BITMAP, <br />
           0, 0, LR_CREATEDIBSECTION);<br />
<br />
        BITMAP bm;<br />
        GetObject(m_hBmp, sizeof(bm), &bm);    <br />
<br />
        m_rectLogo.left = 15;<br />
        m_rectLogo.right = 15 + bm.bmWidth;<br />
        m_rectLogo.top = 2 ;<br />
<br />
        return 0;<br />
}<br />

Next I tried to create a solid brush (for testing) in OnCreate and tried to select that object but that is also not working

<br />
int CMyStatusBar::OnCreate(LPCREATESTRUCT lpCreateStruct)<br />
{<br />
	if (CStatusBar::OnCreate(lpCreateStruct) == -1)<br />
		return -1;<br />
<br />
	if (!m_oBrush.CreateSolidBrush (RGB(255, 0, 0)))<br />
		AfxMessageBox ("Error in creating brush");<br />
<br />
	GetStatusBarCtrl().GetDC ()->SelectObject (&m_oBrush);<br />
<br />
         return 0;<br />
}<br />

I am unable to change the DC of the status bar.

Let me know how to draw a bitmap as back ground for a status bar?

Thanks for your time

Re: how to change the device context for a status bar

jk chan7-Aug-07 0:01

jk chan

7-Aug-07 0:01

Ok . Try CDC->fillsolidrect instead of bitmap painting. iF it not works , problem may with ur dc handle .

If u can Dream... U can do it

Re: how to change the device context for a status bar

BlrBoy7-Aug-07 0:08

BlrBoy

7-Aug-07 0:08

Thanks for quick response. I am looking for chaging the background with an image. The function fillsolidrect changes the full color of the status bar.

Re: how to change the device context for a status bar

jk chan7-Aug-07 0:28

jk chan

7-Aug-07 0:28

Ok , i tried it and got the result.
try moving the same code to onpaint.

If u can Dream... U can do it

Re: how to change the device context for a status bar

BlrBoy7-Aug-07 1:06

BlrBoy

7-Aug-07 1:06

I tried to override OnDraw () but all panes are not getting painted I am getting solid rectangle image on full status bar. here is the code

void CMyStatusBar::OnPaint()<br />
{<br />
	CPaintDC dc(this); // device context for painting<br />
	RECT rect;<br />
	GetClientRect (&rect);<br />
	dc.FillSolidRect (&rect, RGB(255, 124, 20));<br />
}

If I remove FillSolidRect function the status message, panes are not visible.

Please help me out.

Thanks for your time.

Re: how to change the device context for a status bar

jk chan7-Aug-07 2:12

jk chan

7-Aug-07 2:12

Beacuse here you painted the entire status bar. IF you are doing it in onpaint, you need to handle every thing. Smile | :)

or try WM_DARWITEM messages handling
read this link from msdn (you can see ownder draw status bar).
http://msdn2.microsoft.com/en-us/library/ms651126.aspx#sb_owner_draw[^]

If u can Dream... U can do it

Re: how to change the device context for a status bar

BlrBoy7-Aug-07 3:18

BlrBoy

7-Aug-07 3:18

Thanks... Here is an easy solution for that, you can call SetBkColor () directly. it will change the back ground color.

m_wndStatusBar.GetStatusBarCtrl ().SetBkColor (RGB ( 255, 255, 22));

Thanks for your time

Re: how to change the device context for a status bar

jk chan7-Aug-07 15:01

jk chan

7-Aug-07 15:01

Ok. But you said you need to Draw image as a background Smile | :)

. I think there is no function to set background image. you need to handle drawitem

If u can Dream... U can do it

Re: how to change the device context for a status bar

BlrBoy7-Aug-07 18:05

BlrBoy

7-Aug-07 18:05

You are right... I could achieve drawing background color, but not image. Big Grin | :-D

Here is the code

<br />
void CMyStatusBar::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)<br />
{<br />
	CDC dc;<br />
	dc.Attach(lpDrawItemStruct->hDC);<br />
<br />
	// Get the pane rectangle and calculate text coordinates<br />
	CRect rect(&lpDrawItemStruct->rcItem);<br />
<br />
	switch(lpDrawItemStruct->itemID) {<br />
<br />
		case 0:<br />
			dc.FillSolidRect (rect, RGB (255,255,0));<br />
                        break;<br />

here is the code in mainfrm.cpp in OnCreate () function

for (int i=0; i<4; i++)<br />
{<br />
    // Change Status Bar style to make it Owner-drawn<br />
    m_wndStatusBar.GetStatusBarCtrl().SetText("", i, SBT_OWNERDRAW); <br />
}<br />

Since it is owner draw.. DrawItem is called. but FillSolidRect is getting executed but no change in UI. I tried to use CDC functions like TextOut, rectangle,etc.. UI there is no change.

Can you say why is this behaviour? What went wrong

Thanks for your time.

Re: how to change the device context for a status bar

jk chan7-Aug-07 19:59

jk chan

7-Aug-07 19:59

Because after your oncreate the framework again calls some SetText(with default stats messages , in that it is not ownerdraw)for puttif default messages for file -> new ,etc. So ur changes are lost.

If u can Dream... U can do it

Re: how to change the device context for a status bar

jk chan7-Aug-07 20:05

jk chan

7-Aug-07 20:05

Sorry i forgot to say this , Also put m_wndStatusBar.SetPaneStyle(0,SBPS_OWNERDRAW); in ur on create. 0 -> pane number .

this will be ok. Big Grin | :-D

If u can Dream... U can do it

How to change a Dialog Form's scrollbar's color?

Peter, Chan6-Aug-07 21:23

Peter, Chan

6-Aug-07 21:23

How to change a Dialog Form's scrollbar's color?

Re: How to change a Dialog Form's scrollbar's color?

jk chan6-Aug-07 23:53

jk chan

6-Aug-07 23:53

try WM_CTLCOLOR

If u can Dream... U can do it

Re: How to change a Dialog Form's scrollbar's color?

Hamid_RT7-Aug-07 19:19

Hamid_RT

7-Aug-07 19:19

See WM_CTLCOLORSCROLLBAR.

WhiteSky

How to save a html file in C#.Net

sundeep.A6-Aug-07 21:20

sundeep.A

6-Aug-07 21:20

Hello Every body,
I had developed an application of attendenceManagement, where Payslip is generated at every 30th of month and that should be sent to each employee mail address, so how can i save a payslip and forward to every empolyee.
Help me.

Sundeep

Re: How to save a html file in C#.Net

Jonathan [Darka]6-Aug-07 23:31

Jonathan [Darka]

6-Aug-07 23:31

Wrong forum, try here, C#[^]

Jonathan Wilkes
Darka[Xanya.net]

Re: How to save a html file in C#.Net

Hamid_RT7-Aug-07 19:18

Hamid_RT

7-Aug-07 19:18

Oh an C#.Net question on the C++ forum?;)

WhiteSky

Web Based Installation

vipin_nvk6-Aug-07 21:03

vipin_nvk

6-Aug-07 21:03

Hello

If I want to perform a web based installation like what Symantec anti virus provides for installing updates, what are the things we have to take into consideration. I am new to web based development and unaware of the various factors to be considered during web based development. Is it possible in VC++ ?

Thanx.

How to write partial scanline: TIFF file

vandana76-Aug-07 20:01

vandana7

6-Aug-07 20:01

How to write partial scanline to other TIFF file?

Re: How to write partial scanline: TIFF file

sunil20046-Aug-07 20:38

sunil2004

6-Aug-07 20:38

The Tiff file consist of tags and to insert the scan line the 256 and 257 tag should be added to tiff file which denotes the acutal scanline width and hight, and other tags attributes should be filled appropriately.

Its better to insert these tags and scan line data at end, if it is inserted in between then we end up shifting the details of each tag by that offset

I hope this will help in finding the right solutions. Smile | :)

Regards
Sunil Tonger

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