C / C++ / MFC

Re: CTreeCtrl TV_ITEM labels - trasparent help needed plz

29-Jan-08 18:47

I am am drawing gradient color on CTreeCtrl background and i want to make CTreeCtrl TV_ITEM labels ( text labels 0 trasparent ...

I am getting Image transparent
but not the text labels next to the image ... thats what is the problem

please let me know how to make it

thanks in advance

Iain Clarke, Warrior Programmer29-Jan-08 23:58

Iain Clarke, Warrior Programmer

29-Jan-08 23:58

This same question was answered yesterday. please read back to get your answer.

Iain.

Re: CTreeCtrl TV_ITEM labels - trasparent help needed plz

sarat30-Jan-08 3:45

Re: CTreeCtrl TV_ITEM labels - trasparent help needed plz

30-Jan-08 3:45

Thanks Iain,

That solution will work only when there is background image is need to be painted

I shud not have any background image to me painted

coz i am painting Gradient color in background

now how to make the lables trasparent?

Though
in that solution who is calling CTreeCtrlX::SetBkImage(UINT nIDResource)fuction is not there...
there is no message who will call the function

please help me if u can

first of all i shud not use image coz .. gradient color need to me painted .. gradient i have done but the labels......

whats the solution
or can you please tell me how i can use the code mentioned in the Article

Iain Clarke, Warrior Programmer30-Jan-08 4:11

Iain Clarke, Warrior Programmer

30-Jan-08 4:11

Have a look at the CXTreeCtrl control, and see the parts where they paint a bitmap. Just replace those with drawing a gradient.

Just because the answer hasn't been given to you 100%, doesn't mean you can't adapt their work.

Iain.

Re: CTreeCtrl TV_ITEM labels - trasparent help needed plz

sarat30-Jan-08 4:34

Re: CTreeCtrl TV_ITEM labels - trasparent help needed plz

30-Jan-08 4:34

Really thanx

please let me know who is calling SetBkImage(UINT nIDResource) in that artcl.. do i need to call that Onerasebakgrnd?
or in onPaint()?
please let me know wen shud i call SetBkImage(UINT nIDResource)

Iain Clarke, Warrior Programmer30-Jan-08 4:39

Iain Clarke, Warrior Programmer

30-Jan-08 4:39

sarat wrote:
please let me know who is calling SetBkImage(

I have no idea. Try putting a breakpoint on that function, and then you'll find out.

Iain.

Re: CTreeCtrl TV_ITEM labels - trasparent help needed plz

sarat30-Jan-08 4:47

CTreeCtrl TV_ITEM labels - are painted with black background instead of trasparent

30-Jan-08 4:47

there is no souce code is available
to debug

if i put the code in my app the function is not calling only

and
SetBkImage() is not a member of CTreeCtrl
to over ride
its mentioned that it is overridable function

sarat30-Jan-08 23:06

Re: CTreeCtrl TV_ITEM labels - are painted with black background instead of trasparent

30-Jan-08 23:06

hi
I implimented CustomDraw

when i put lptvcd->clrTextBk = CLR_NONE ;
lables are painted with black color background but not trasparent
please some one tell me what shud i change in the code to get the CtreeCtrl lables trasparent

void CLeftPaneTreeCtrl::OnCustomDraw(NMHDR* pNMHDR, LRESULT* pResult)
{
switch(pNMHDR->code)
{
case NM_CUSTOMDRAW:
{
LPNMTVCUSTOMDRAW lptvcd = (LPNMTVCUSTOMDRAW )pNMHDR;

lptvcd->clrTextBk = CLR_NONE ;
lptvcd->clrText = (RGB(0,0,255));

//SetTextColor(RGB(255, 0, 0));
//SetBkMode(lplvcd->nmcd.hdc,TRANSPARENT);

switch (lplvcd->nmcd.dwDrawStage)
{

case CDDS_PREPAINT:

// Need to process this case and set pResult to
// CDRF_NOTIFYITEMDRAW, otherwise parent will never receive
//CDDS_ITEMPREPAINT notification. (GGH)

*pResult = CDRF_NOTIFYITEMDRAW;
return;

}
}
}
}

sarat1-Feb-08 2:56

Re: CTreeCtrl TV_ITEM labels - are painted with black background instead of trasparent [modified]

1-Feb-08 2:56

in my Tree control OnCustomDraw i have written code like this

void CLeftPaneTreeCtrl::OnCustomDraw(NMHDR* pNMHDR, LRESULT* pResult)
{
switch(pNMHDR->code)
{
case NM_CUSTOMDRAW:
{
LPNMTVCUSTOMDRAW lptvcd = (LPNMTVCUSTOMDRAW )pNMHDR;

//lptvcd->clrTextBk = CLR_NONE ;
//lptvcd->clrText = (RGB(0,0,255));

SetTextColor(RGB(255, 0, 0));
SetBkMode(lplvcd->nmcd.hdc,TRANSPARENT);

switch (lplvcd->nmcd.dwDrawStage)
{

case CDDS_PREPAINT:

// Need to process this case and set pResult to
// CDRF_NOTIFYITEMDRAW, otherwise parent will never receive
//CDDS_ITEMPREPAINT notification. (GGH)

*pResult = CDRF_NOTIFYITEMDRAW;
return;

}
}
}
}

in that code
SetTextColor(RGB(255, 0, 0)); works fine

SetBkMode(lplvcd->nmcd.hdc,TRANSPARENT); doesnt work ( it doesnt make TreeCtrl lables trasparent

CLeftPaneTreeCtrl is Derived class of CTreeCtrl
My I am hosting TreeCtrl on CView derived class MyView

and
if i uncomment both the lined comented in the code

lptvcd->clrTextBk = CLR_NONE ; -> doent work it paints Black background instead of transparent color

but any other color for eg lptvcd->clrTextBk = RGB(0,0,225) works fine

lptvcd->clrText = (RGB(0,0,255)); -> works fine

now I am not able to make lables trasparent

but one more thing ... the same method works fine in my CListCtrl with respect to trasparent lables ... ofcouse there r some other probs butfirst i wnana sort out the rpob with tree control transparent labels first

am looking for solution please help me out

sarat4-Feb-08 17:47

Hour Glass won't go away!

4-Feb-08 17:47

help plzzzzzzzzzzzzz

modified on Friday, February 8, 2008 6:19 AM

@largeinsd29-Jan-08 18:18

29-Jan-08 18:18

Hi,

I am creating a dialog based application in MFC, and I am having a weird problem with one of the CWnd derived objects on my dialog.

Basically when starting the application, if it starts up such that the mouse pointer is over one particular dialog (which I created...) the hourglass doesn't go away until I move the mouse off that part of the dialog. As soon as I move it off the dialog it goes away. If it starts up such that the mouse over another part of the dialog it goes away just fine.

However, it's kind of annoying (and unprofessional) because that part of the dialog that causes the mouse the hourglass to hang is quite large.

Strange! Is there any way to programatically tell the hour glass to go away?

Thanks - @LRG

@largeinsd29-Jan-08 18:25

29-Jan-08 18:25

Ok,

Let me answer my own question - I just found that if I put EndWaitCursor() in the OnInitDialog memeber after creating the problem CWnd it works.

Wondering, is this a bit of a kluge?

Thanks - @LRG

David Crow30-Jan-08 3:42

30-Jan-08 3:42

@largeinsd wrote:
Wondering, is this a bit of a kluge?

Sounds like it.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

David Crow30-Jan-08 3:43

30-Jan-08 3:43

@largeinsd wrote:
...the mouse pointer is over one particular dialog (which I created...)

How many dialogs are we talking about here? The first sentence in this post implies one dialog with several controls on it. Is there more to it than that?

@largeinsd30-Jan-08 6:13

30-Jan-08 6:13

DavidCrow wrote:
How many dialogs are we talking about here? The first sentence in this post implies one dialog with several controls on it. Is there more to it than that?

Yes, you're right - one dialog with several controls. One particular control is causing the problem.

@LRG

David Crow30-Jan-08 6:21

30-Jan-08 6:21

@largeinsd wrote:
One particular control is causing the problem.

And what type of control would that be?

@largeinsd30-Jan-08 8:10

30-Jan-08 8:10

Wow you ask the tough questions... Smile | :)

It's a custom (CWnd derived) class I found on this web site for doing OpenGL in an MFC Window. It's called a COpenGLControl.

Not trying to get folks to debug some random code I found on the interwebs, so that's why I was speaking in generalities. Smile | :)

Thanks - @LRG

David Crow30-Jan-08 8:22

30-Jan-08 8:22

Do you have an entry in your dialog's DoDataExchange() method for the COpenGLControl control? If so, can you temporarily comment it out and note the result.

@largeinsd31-Jan-08 8:24