C / C++ / MFC

4-Feb-09 23:35

I have to diaplay one png image in dialog box(like bmp in picture control).
any can help me...
my image has some transparent things... if change it into bmp format than it won't be transparent
so what i have to for diaplaying png image in dialog

Code-o-mat5-Feb-09 0:09

Code-o-mat

5-Feb-09 0:09

Use CxImage[^].

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

ganesh.dp5-Feb-09 0:56

5-Feb-09 0:56

I already tried this using following code
but that image lost it's transparency and looks like bmp

HBITMAP m_bitmap = NULL;
CxImage image("myfile.png", CXIMAGE_FORMAT_PNG);
...
CDC* hdc = m_picture.GetDC();
HBITMAP m_bitmap = image.MakeBitmap(hdc->m_hDC);

HBITMAP hOldBmp = m_picture.SetBitmap(m_bitmap);
if (hOldBmp) DeleteObject(hOldBmp);
if (hdc->m_hDC) m_picture.ReleaseDC(hdc);
...
if (m_bitmap) DeleteObject(m_bitmap);

Code-o-mat5-Feb-09 1:11

Code-o-mat

5-Feb-09 1:11

Ah, you won't get transparent blitting from the picture control (which is a CStatic actually), look at Stuart Dootson's post. You will have to do the blitting yourself, i recommend using CxImage's own blitting methods.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

Stuart Dootson5-Feb-09 0:34

Stuart Dootson

5-Feb-09 0:34

Create a 'picture control' to hold the picture

Derive a class from CStatic that'll draw the picture. It should declare a message map and handle WM_PAINT and use a CImage to hold the image. Note the call to TransparentBlt, which (as I've coded it) assumes that the top-;peft pixel of hte image is the transparent colour:

class MyPic : public CStatic
{
public:
   MyPic();
protected:
   afx_msg void OnPaint();
   DECLARE_MESSAGE_MAP()
private:
   CImage image_;
};
MyPic::MyPic()
{
   image_.Load(png filename);
}
void MyPic::OnPaint()
{
   PAINTSTRUCT ps;
   CDC * drawDC = BeginPaint(&ps);
   CRect rcClient;
   GetClientRect(&rcClient);
   image_.TransparentBlt(*drawDC, rcClient, CRect(0, 0, image_.GetWidth(), image_.GetHeight()), image_.GetPixel(0, 0));
   EndPaint(&ps);
}

Declare a member variable wfor the picture control that is of the type you've just made.
See your picture be displayed!

ganesh.dp5-Feb-09 0:54

5-Feb-09 0:54

Cimage is in VC6.0?
why because i am getting error

Stuart Dootson5-Feb-09 0:58

Stuart Dootson

5-Feb-09 0:58

ganesh.dp wrote:
Cimage is in VC6.0?

Probably not - but you didn't say you were using 10-11 year old software.

CImage is definitely in VS.NET 2003 - and that's the oldest VS I have.

ganesh.dp5-Feb-09 1:03

5-Feb-09 1:03

so any other solution?

Re: Need help on how redraw bitmap image when clicked on vertical scroll bar

Stuart Dootson5-Feb-09 1:13

Stuart Dootson

5-Feb-09 1:13

CImage is just a wrapper around a GDI+ Image[^] - you could try using GDI+ - you will need to get a version of the Platform that a) is compatible with VS6, and b) contains GDI+.

As this Platform SDK[^] is the last one that works with VS6, I guess it's your best option.

CToolBars

Caslen4-Feb-09 23:12

Caslen

4-Feb-09 23:12

Hi Guys,

I'm looking to be able to position 2 CToolBar objects into an SDI both permanently docked to the top but one left justified and one right justified on the same line. All my efforts so far leave the bars docked one above the other.

Any ideas?

Thanks

John5024-Feb-09 23:02

John502

4-Feb-09 23:02

Hi,
I have created one sample application, which has one parent window. There i have created one picture frame, i want to insert one child window in the place of picture frame. I am able to do that and i am able to get vertical scroll bar on dialog box.

In child dialog i calling onpaint() for creating bitmap images and check boxes, there i want to create 20 bit map images, i did that.

Whenever i have scrolled down the scroll bar, the the image which is moving up is erasing, and it is displaiyng like overlapping all the images with one another...

Can any help me to get rid out of this problem..?

Thanks
Venkatesh. Smile | :)

Database error "Record is too large."

Le@rner4-Feb-09 22:41

Le@rner

4-Feb-09 22:41

Hi all,

Please tell me how can i remove this error "Record is too large."

thanks in advance.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

CPallini4-Feb-09 23:13

CPallini

4-Feb-09 23:13

"_$h@nky_" wrote:
Please tell me how can i remove this error "Record is too large."

Drop the table.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Le@rner4-Feb-09 23:16

Le@rner

4-Feb-09 23:16

i m not drop the table.

please tell me any solution.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.

CPallini4-Feb-09 23:19

CPallini

4-Feb-09 23:19

You should really make a better post in order to get any help. For instance post the relevant code and be more detailed and precise about the error (i.e. aat what line it occurs?).
Smile | :)

Caslen4-Feb-09 23:16

Caslen

4-Feb-09 23:16

Try using smaller records (45s?) or switch to CDs like the rest of us Smile | :)

CPallini4-Feb-09 23:20

CPallini

4-Feb-09 23:20

BTW: you should use the joke icon...

Caslen4-Feb-09 23:21

Caslen

4-Feb-09 23:21

Corrected - sorry!

Le@rner4-Feb-09 23:20

Le@rner

4-Feb-09 23:20

i m using table in database, here diffrent type of data types i m using.

when i m add entries in table in form of special characters than this error comes.

i m not using very long data like for Text data type i m using less than 255 characters.

please help me for this.

To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.