How to resize listbox's cell Height dynamically?

Question

How to resize listbox's cell Height dynamically?<br /><br />// .fr<br /><br />Class<br />{<br />kMPSListBoxWidgetBoss,               <br />kWidgetListBoxWidgetNewBoss,<br />{<br />...............<br />}     <br />},<br />type MPSListBoxWidget( kViewRsrcType )      : WidgetListBoxWidgetN     <br />(ClassID = kMPSListBoxWidgetBoss)<br />{};<br /><br />MPSListBoxWidget<br />(<br />                                   kMPSEditScrapListCtrlWidgetID + 1,<br />     kSysOwnerDrawListBoxPMRsrcId,<br />     kBindAll,// Frame binding<br />     Frame( 0, 1, 304, 278 )          // Frame<br />     kTrue, kTrue,<br />     1, 0,<br />     150,     // cellheight<br />     0,          // borderwidth<br />     kFalse, kTrue,<br />     kTrue,<br />     kTrue,<br />     kTrue,<br />     kFalse,<br />     kTrue,<br />     kFalse,<br />     0<br />     {<br />       CellPanelWidget<br />      (<br />                 kCellPanelWidgetID, kPMRsrcID_None,<br />          kBindAll,// Frame binding<br />          Frame( 0, 0, 304, 278 )          // Frame<br />          kTrue, kTrue// Visible, Enabled<br />          {<br /><br />          }<br />       )                              <br />}<br /><br />),<br /><br />I am trying to rezie listbox's cell height with InterfacePtr<IListBoxAttributes>. but it doesn't work! Please help!!<br />//     <br /><br />InterfacePtr<IListBoxAttributes> iListBoxAttr(listBox,IID_ILISTBOXATTRIBUTES);<br />if ( iListBoxAttr )<br />{<br />     PMReal rCellHeight          = IMAGEITEM_HEIGHT;<br />        iListBoxAttr->SetCellHeight( rCellHeight );<br />}          .

Answer 1

ListBox is deprecated, use TreeView.
When do you change that attribute, is the listbox already showing and populated with cells?
It could be you're just missing an Invalidate(), but probably you have to clear and rebuild the whole listbox (content). Additionally, do you adjust the size of the cell widgets?
Dirk