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#1 Posted : Tuesday, October 20, 2009 11:47:26 PM(UTC)

wjh0574  
wjh0574

Groups: Registered
Posts: 16


hello all:
i want to realize my own image process dialog just like that leadtools provide dialog.and i realize the dialog .but when i drag
the slider it is process very slow.for example when i do median dialog it is very slow but the median dialog that leadtools provide not slow.how can i to do.


void CImageProcessDlg::OnImageProcessSlider(NMHDR* pNMHDR, LRESULT* pResult)
{
    // TODO: Add your control notification handler code here
    m_bitmap.Copy(m_BeforeImage.LeadBitmap);
    m_nSilder = m_SliderCtrl.GetPos();
    m_strEdit.Format("%d",m_nSilder);
    m_Edit.SetWindowText(m_strEdit);
    switch(m_ProcessType)
    {
    case IMAGEMEDIAN:
        m_bitmap.MedianFilter(m_nSilder);
        break;
    }
    m_AfterImage.LeadBitmap.Copy(m_bitmap);
    m_AfterImage.SetPaint();
    *pResult = 0;
}


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复件 YxTest.zip (439kb) downloaded 19 time(s).
 

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#2 Posted : Tuesday, October 20, 2009 11:50:15 PM(UTC)

wjh0574  
wjh0574

Groups: Registered
Posts: 16


buy the way,i use the leadtool 13.and coder with VC.
thank you.
 
#3 Posted : Wednesday, October 21, 2009 6:45:40 AM(UTC)

Adam Boulad  
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Posts: 3,034

Was thanked: 2 time(s) in 2 post(s)

It appears your OnImageProcessSlider function calls our Median function with every refresh of the display or movement of the slider.
Try to change your code so that processing is only done after the slider finishes moving.
 
#4 Posted : Wednesday, October 21, 2009 4:09:59 PM(UTC)

wjh0574  
wjh0574

Groups: Registered
Posts: 16


hello Adam Boulad:
thank you for your reply.just as your say,the median fuction with every refresh of the display  or movement of the slider.i also process the image when have done after the slider finishes moving.but the result is not very good.i want to known how the median dialog realize which the leadtools provided.can you provide some
suggest how to process is only done after the slider finishes moving.

thank you very much.
 
#5 Posted : Thursday, October 22, 2009 6:16:04 AM(UTC)

Adam Boulad  
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Was thanked: 2 time(s) in 2 post(s)

I'm not sure that I understand the problem, what is the problem exactly? What exactly do you mean by "the result is not very good"? Do you mean that you are still facing an issue with sliding speed? Or do you mean that the display quality in the dialog is not good?

Regarding the issue of when to process the image, try to find a notification that is sent after slider finishes scrolling to process the image.
 
#6 Posted : Thursday, October 22, 2009 5:07:06 PM(UTC)

wjh0574  
wjh0574

Groups: Registered
Posts: 16


hello:
the problem is sliding speed.it is very slow.
how L_DlgGetChange() it realize.

 
#7 Posted : Sunday, October 25, 2009 6:12:08 AM(UTC)

Adam Boulad  
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Posts: 3,034

Was thanked: 2 time(s) in 2 post(s)


One way to do it is to handle the WM_HSCROLL message and only process the bitmap when scrolling finishes (scrollbar code = SB_ENDSCROLL).
Here's how to use this approach:
void CImageProcessDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
   m_nSilder = m_SliderCtrl.GetPos();
   m_strEdit.Format("%d",m_nSilder);
   m_Edit.SetWindowText(m_strEdit);
   if(SB_ENDSCROLL == nSBCode)
   {
      m_bitmap.Copy(m_BeforeImage.LeadBitmap);
      m_bitmap.MedianFilter(m_nSilder);
      m_AfterImage.LeadBitmap.Copy(m_bitmap);
      m_AfterImage.SetPaint();
   }
   CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}
 
#8 Posted : Sunday, October 25, 2009 11:25:50 PM(UTC)

wjh0574  
wjh0574

Groups: Registered
Posts: 16


hello:
it's working. thank you very much!
[:D]
have a nice day.
 
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