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I have a tree grid with two columns. I want that each column will occupy 50% of the grid. I initialized my grid as follows, but it does not happen. The first column size stays fixed, and the second column occupy the rest of the grid. Can you please check if there is a problem in my code or a bug?

Thanks.

  SiwModifyStyle(
        (__ESIS_STH_NONE|__ESIS_STV_ITEM)        // Item scroll window styles
        | __EGBS_SFB_FULL_ROWS                   // Selection/focus type - full rows
        | __EGBS_DYNAMIC_RESIZING                // Resize rows/columns on-the-fly
        | __EGBS_RESIZING_CELLS_OUTER            // enable row/column resizing
        ,0, false);

    SiwModifyStyleEx(
        __EGBS_EX_CELL_TOOLTIPS_INNER
        | __EGBS_EX_CELL_EXPANDING_INNER
        | __EGWS_EX_PM_COLORS
        | __EGBS_EX_CORNER_AREAS_3D
        | __EGBS_EX_CORNER_AREAS_CURVE
        | __EGBS_EX_HVI_EVENT_CELLS
        ,0, false);

    BseModifyStyleEx(__EGBS_BSE_EX_PROPORTIONAL_COLUMN_WIDTHS);

    OuterRowCountTopSet(1, false);
    OuterRowHeightSet(true, 0, 0);
    ColumnAdd(2, false);

    CExtGridCell* pCell = NULL;
    HTREEITEM htiCurrent = NULL;

    CExtGridCellHeader* pCellHdr = NULL;
    
    pCellHdr = (CExtGridCellHeader*)GridCellGetOuterAtTop(0, 0, RUNTIME_CLASS(CExtGridCellHeader));
    pCellHdr->ExtentPercentSet(0.5);

    pCellHdr = (CExtGridCellHeader*)GridCellGetOuterAtTop(1, 0, RUNTIME_CLASS(CExtGridCellHeader));
    pCellHdr->ExtentPercentSet(0.5);

Found the problem I did have an extra ExtentSet

Thanks.

The proportional column resizing work equally for the CExtReportGridWnd, CExtTreeGridWnd and CExtGridWnd controls. This feature is completely implemented in the CExtGridWnd class. We have quickly checked the problem in the report grid with two columns and we found no problems. We know that the first column can have a persistent width only if you specified the minimal/current/maximal width in pixels in the header cell of this column using the CExtGridCell::ExtentSet() method. Only in this case the double value specified in the CExtGridCell::ExtentPercentSet() method is ignored. You told that the second column is resized. This means the proportional column resizing feature is active and working in the grid window. We don’t know any other way to freeze the first column except specifying its 3 fixed width in pixels. Please check your code additionally. If you do not find suspected assignments of all three fixed width in your code, we will try to create a smallest possible test project for you.

Thank you for the reply - I will check my code to see if an ExtentSet is called somewhere else and let you know.