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Grid Virtual Mode |
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BCGControlBar Pro (MFC) |
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BCGSuite (MFC) |
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BCGControlBar (Microsoft .NET) |
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You can create a high-performance Grid control with unlimited number of items. The Grid control has the following methods for the virtual mode handling:
- EnableVirtualMode: enable virtual mode and set a callback function
- SetVirtualRows: define the number of grid rows in the virtual mode
Please take a look at the BCGPGridExample application ("Virtual List" tab and "Grid Control | Virtual Mode Test" dialog) to see how to add to the grid 1 billion items.
In addition, the virtual mode has been implemented in the database grids. Run the BCGPDBGridDemo example to see this feature in action. |
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| Sample code: |
// Grid callback function:
static BOOL CALLBACK GridCallback (BCGPGRID_DISPINFO* pdi, LPARAM)
{
ASSERT (pdi != NULL);
int nRow = pdi->item.nRow;
int nCol = pdi->item.nCol;
pdi->item.varValue = value;
return TRUE;
}
CBCGPGridCtrl m_wndGrid;
// Create grid control:
m_wndGrid.Create (WS_CHILD | WS_VISIBLE, rect, this, ID_GRID);
// Enable virtual mode:
m_wndGrid.EnableVirtualMode (GridCallback);
m_wndGrid.SetVirtualRows (100000000);
m_wndGrid.AdjustLayout (); |
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