Impala Documentation

void Impala::Application::VideoExcel::TableOverviewWindow::UpdatePixelCache ( int height ) [inline]

Definition at line 79 of file TableOverviewWindow.h.

References Impala::Application::VideoExcel::TableDataSource::GetMark(), ILOG_DEBUG, MarkToColor(), mPixelCacheSynced, mSelPixelCache, mSource, and PixelToRows().

Referenced by DisplayFunc().

00080     {
00081         mSelPixelCache.clear();
00082     
00083         if (mDrawHeight < mSource->GetFilteredRows())
00084         {
00085             ILOG_DEBUG("Updating selection cache...");
00086             // more rows than pixels: sample the rows
00087             for (int pixelrow = 0; pixelrow < height; pixelrow++)
00088             {
00089                 int start, stop;
00090                 PixelToRows(pixelrow, &start, &stop);
00091                 unsigned long avgcol = 0;
00092                 for (int y=start; y<=stop; y++)
00093                 {
00094                     int mark = mSource->GetMark(y);
00095                     if (mark)
00096                     {
00097                         avgcol = MarkToColor(mark);
00098                         break; // only take first color found,instead of average
00099                     }  
00100                 }
00101 
00102                 mSelPixelCache.push_back(avgcol);
00103             }
00104             mPixelCacheSynced = true;
00105         }
00106     }

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