Column tree

TreeGrid documentation

Since 7.0 version TreeGrid supports tree also in columns, it means hiding and showing individual columns on click to expand / collapse button in some cell (usually header cell).
Similarly it supports also showing and hiding individual rows (usually, but not required, fixed rows) on click to Expand button.
The collapsed / expanded columns or rows do not need to be adjacent!
The tree level count is not limited!
If the column is displayed in grid. Set <C Visible='0' Hidden='1'/> for collapsed columns on start.
Hidden='1' can be set only for Visible='0' and <Cfg FastColumns ='1'/>. This column will be rendered as hidden (width 0px).
It slows down rendering grid (the column is rendered) but speeds up showing / expanding the column (it is just resized).
Set <C Visible='0' Hidden='1'/> for collapsed columns on start.
If column hiding is done by setting its width to 0px. This action is faster than removing the cells and speeds up also showing the column.
For expanding / collapsing columns is strongly recommended to use default setting FastColumns='1'.
If the row is displayed in grid. Set to 0 for collapsed rows on start.
To show right side Expand button set Button="Expand".
It is shown usually in <Header> cell to show / hide columns, but can be shown in any cell, in variable, fixed or space cell.
To show left side Expand button set Icon="Expand".
It is shown usually in <Header> cell to show / hide columns, but can be shown in any cell, in variable, fixed or space cell.
A list of column names to show / hide them on click to Button='Expand'.
If you want to have deep tree of expanding columns (more nested levels) you must list here only immediate children, not the whole tree. And set appropriate ExpandLevel to the columns.
A list of row ids to show / hide them on click to Button='Expand'
Since 9.3 the item can be also a Name of default row to represent all rows with this default.
Initial state of the Button='Expand'.
If not set, the state is 1 if any column in the ExpandCols is visible. If ExpandCols is not defined it tests ExpandRows.
If neither ExpandCols nor ExpandRows defined returns state of row Expanded attribute.
Set it for more complex tree where the Expanded state is computed incorrectly.
The row / column is shown on click to Expand Button when its ExpandLevel is positive (>=1). It is hidden if its ExpandLevel is zero or negative (<=0).
Use it when more Expand Buttons show / hide one row / column.
If not set, every Expand Button shows / hides the row / column on its click.
If set, click to Expand Button will increase (when expanding) / decrease (when collapsing) this value and only if the value changes from 0 to 1 (shows the column / row) or from 1 to 0 (hides the column / row).
The ExpandLevel must be set accordingly to the row / column Visible attribute and also Expanded state of the Expand Buttons that control the row.
Let's say there are three collapsed buttons that control the row. Setting ExpandLevel='-2' means that all three buttons must be expanded to show the row. Setting ExpandLevel='0' means that every button shows the row and all three buttons must be collapsed to hide it. The row attribute Visible must be set to '0'.
Let's say there are three expanded buttons that control the row. Setting ExpandLevel='1' means that all three buttons must be expanded to show the row. Setting ExpandLevel='3' means that every button shows the row and all three buttons must be collapsed to hide it. The row attribute Visible must be set to '1'.
If set to 1, it collapses all other cells in this row when some cells is being expanded.
If set to 1, it hides parent column when expanding it = shows the children instead of the parent column and vice versa.
In this case the cell with expand button should be spanned through the child columns to be still visible after the parent column hides.
If used more column levels, they should have set ExpandLevel to correctly hide / collapse the columns.
Set to 1 in the spanned expand / collapse cell when set HideParentCol=1 and FastColumns=1 to not hide the cell border when the column is hidden.
Returns true if the cell side Button Expand is expanded.
Expands or collapses the rows / columns defined by ExpandCols / ExpandRows in the cell.
Expands or collapses the rows / columns defined by ExpandCols / ExpandRows in actual or focused cell.
Expands columns defined by ExpandCols in actual or focused cell.
Collapses columns defined by ExpandCols in actual or focused cell.
Expands rows defined by ExpandRows in actual or focused cell.
Collapses rowss defined by ExpandRows in actual or focused cell.
Expands all cells in all Header rows in grid.
To expand cells in other rows use API IsCellExpanded / ExpandCell in loop instead.
Collapsed all cells in all Header rows in grid.
To collapse cells in other rows use API IsCellExpanded / ExpandCell in loop instead.
Expands all cells in actual Header row.
Collapsed all cells in actual Header row.