how to change the device context for a status bar - C / C++ / MFC Discussion Boards

Re: Database Updates

C++_Newbee7-Aug-07 18:09

C++_Newbee

7-Aug-07 18:09

Thanks...

DavidCrow wrote:
Yes, you can use secondary threads for (some of) this

Is there any other method other than threads , with which i can achieve the application processing its current call with the old data , and at the same time it updating the Logical Cache with the new data , for subsequent calls.

Confused | :confused:

stdout

baerten6-Aug-07 22:34

baerten

6-Aug-07 22:34

Hello,

i redirect the output flow of stdout with a pipe to a buffer.
Is it also possible to catch the position and color of the font & background?

Big thanks Smile | :)

Re: stdout

Russell^'6-Aug-07 23:56

Russell^'

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.

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