Virtual Collapsable Cell

Represents an expand - collapse cell, useful to display parent-child records.

Namespace: LSOne.Controls.Cells

Assembly: LSOne.Controls.ListView

Syntax

public class VirtualCollapsableCell : ExtendedCell

Constructors

Name	Description
VirtualCollapsableCell()	Default constructor. Initializes a new instance of the VirtualCollapsableCell class
VirtualCollapsableCell(bool)	Initializes a new instance of the VirtualCollapsableCell class with the given collapsed state.
VirtualCollapsableCell(string, bool)	Initializes a new instance of the VirtualCollapsableCell class with the given text and collapsed state.
VirtualCollapsableCell(string, System.Drawing.Image, bool)	Initializes a new instance of the VirtualCollapsableCell class with the given text, image and collapsed state.

Properties

Name	Description
Collapsed	Gets the collapsed state
Hover	Gets or sets if mouse hovers over the cell
PartSize	Gets or sets the size of the current visual style (System.Windows.Forms.VisualStyles.ThemeSizeType.Draw )

Methods

Name	Description
SetCollapsed(LSOne.Controls.ListView, int, bool)	If value is true then all child rows belonging to the given rowNumber of the given listView are collapsedș otherwise they're expanded.

Remarks

Base class for:

Collapsable Cell

To display parent-child records in a List View you need to:

add parent rows to the list view plus the column that will contain the collapsable cell
implement handler for ListView.RowExpanded event where the child rows are added to the list view
implement handler for ListView.RowCollapsed event where the child rows are removed from the list view

Examples

See Source\SM\Plugins\RetailItems\Views\ItemsView.cs from DevPack for usage examples.


private void LoadItems()
{
	lvItems.ClearRows();
	int itemsCount = 0;
	
	items = service.GetParentItems();
	
	Row row;
	foreach (Item item in items)
	{
		row = new Row();
		
		row.AddCell(new VirtualCollapsableCell((string)item.ID, true));
		row.AddText(item.ItemName);
		
		row.Tag = item;
		
		lvItems.AddRow(row);
	}
}

public void LoadData(bool isRevert, RecordIdentifier context, object internalContext)
{
	LoadItems();
}

private void lvItems_RowExpanded(object sender, RowEventArgs args)
{
	Item parentItem = (Item)lvItems.Row(args.RowNumber).Tag;
	
	List<Item> subRows = service.GetChildItems();
	
	int nextRowNumber = args.RowNumber + 1;
	
	foreach (Item item in subRows)
	{
		Row row = new Row();
		row.AddCell(new ExtendedCell(string.Empty));
		row.AddText((string)item.ItemId);
		row.AddText(item.ItemName);
		
		row.Tag = item;
		
		lvItems.InsertRow(nextRowNumber, row);
		items.Insert(nextRowNumber, item);
		
		nextRowNumber++;
	}
	
	lvItems.AutoSizeColumns();
}

private void lvItems_RowCollapsed(object sender, RowEventArgs args)
{
	Item parentItem = (Item)lvItems.Row(args.RowNumber).Tag;
	
	int rowIndex = args.RowNumber + 1;
	
	while (rowIndex < lvItems.RowCount && parentItem.MasterID == ((Item)lvItems.Row(rowIndex).Tag).ParentMasterID)
	{
		lvItems.RemoveRow(rowIndex);
		items.RemoveAt(rowIndex);
	}
	
	lvItems.AutoSizeColumns();
}