FindItem

Finds the next item in a list.

To find the next item

Use

In a ListBox, DropDownListBox, PictureListBox, or DropDownPictureListBox

Syntax 1

In a ListView control based upon its label

Syntax 2

By relative position in a ListView control

Syntax 3

By relative position in a TreeView control

Syntax 4


Syntax 1: For ListBox and DropDownListBox controls

Description

Finds the next item in a ListBox that begins with the specified search text.

Applies to

ListBox, DropDownListBox, PictureListBox, and DropDownPictureListBox controls

Syntax

listboxname.FindItem ( text, index )

Argument

Description

listboxname

The name of the ListBox control in which you want to find an item.

text

A string whose value is the starting text of the item you want to find.

index

The number of the item just before the first item to be searched. To search the whole list, specify 0.


Return value

Integer.

Returns the index of the first matching item. To match, the item must start with the specified text; however, the text in the item can be longer than the specified text. If no match is found or if an error occurs, FindItem returns -1. If any argument's value is null, FindItem returns null.

Usage

When FindItem finds the matching item, it returns the index of the item but does not select (highlight) the item. To find and select the item, use the SelectItem function.

Examples

Assume the ListBox lb_actions contains the following list:

Index number

Item text

1

Open files

2

Close files

3

Copy files

4

Delete files


Then these statements start searching for Delete starting with item 2 (Close files). FindItem sets Index to 4:

integer Index
Index = lb_actions.FindItem("Delete", 1)

See also

AddItem

DeleteItem

InsertItem

SelectItem

Syntax 2: For ListView controls

Description

Searches for the next item whose label matches the specified search text.

Applies to

ListView controls

Syntax

listviewname.FindItem ( startindex, label, partial, wrap )

Argument

Description

listviewname

The ListView control for which you want to search for items

startindex

The index number from which you want your search to begin

label

The string that is the target of the search

partial

If set to true, the search looks for a partial label match

wrap

If set to true, the search returns to the first index item after it has finished


Return value

Integer.

Returns the index of the item found if it succeeds and -1 if an error occurs.

Usage

The search starts from startindex + 1 by default. To search from the beginning, specify 0.

If partial is set to true, the search string matches any label that begins with the specified text. If partial is set to false, the search string must match the entire label.

If wrap is set to true, the search wraps around to the first index item after searching to the end. If wrap is set to false, the search stops at the last index item in the ListView.

FindItem does not select the item it finds. You must use the item's selected property in conjunction with FindItem to select the resulting match.

Examples

This example takes the value from a SingleLineEdit control and passes it to FindItem:

listviewitem l_lvi
integer li_index
string ls_label
 
ls_label = sle_find.Text
IF ls_label = "" THEN
      MessageBox("Error" , &
         "Enter the name of a list item")
      sle_find.SetFocus()
ELSE
      li_index = lv_list.FindItem(0,ls_label, TRUE,TRUE)
END IF
IF li_index = -1 THEN
      MessageBox("Error", "Item not found.")
ELSE
      lv_list.GetItem (li_index, l_lvi )
      l_lvi.HasFocus = TRUE
      l_lvi.Selected = TRUE
      lv_list.SetItem(li_index,l_lvi)
END IF

See also

AddItem

DeleteItem

InsertItem

SelectItem

Syntax 3: For ListView controls

Description

Search for the next item relative to a specific location in the ListView control.

Applies to

ListView controls

Syntax

listviewname.FindItem ( startindex, direction, focused, selected, cuthighlighted, drophighlighted )

Argument

Description

listviewname

The ListView control for which you want to search for items.

startindex

The index number from which you want your search to begin.

direction

The direction in which to search. Values are:

DirectionAll!

DirectionUp!

DirectionDown!

DirectionLeft!

DirectionRight!

focused

If set to true, the search looks for the next ListView item that has focus.

selected

If set to true, the search looks for the next ListView item that is selected.

cuthighlighted

If set to true, the search looks for the next ListView item that is the target of a cut operation.

drophighlighted

If set to true, the search looks for next ListView item that is the target of a drag and drop operation.


Return value

Integer.

Returns the index of the item found if it succeeds and -1 if an error occurs.

Usage

The search starts from startindex + 1 by default. If you want to search from the beginning, specify 0.

FindItem does not select the item it finds. You must use the item's selected property in conjunction with FindItem to select the resulting match.

If focused, selected, cuthighlighted, and drophighlighted are set to false, the search finds the next item in the ListView control.

Examples

This example uses FindItem to search from the selected ListView item:

listviewitem l_lvi
integer li_index, li_startindex
 
li_startindex = lv_list.SelectedIndex()
li_index = lv_list.FindItem(li_startindex, &
      DirectionDown!, FALSE, FALSE ,FALSE, FALSE)
 
IF li_index = -1 THEN
      MessageBox("Error", "Item not found.")
ELSE
      lv_list.GetItem (li_index, l_lvi)
      l_lvi.HasFocus = TRUE
      l_lvi.Selected = TRUE
      lv_list.SetItem(li_index,l_lvi)
END IF

See also

AddItem

DeleteItem

InsertItem

SelectItem

Syntax 4: For TreeView controls

Description

Find an item based on its position in a TreeView control.

Applies to

TreeView controls

Syntax

treeviewname.FindItem ( navigationcode, itemhandle )

Argument

Description

treeviewname

The name of the TreeView control in which you want to find a specified item.

navigationcode

A value of the TreeNavigation enumerated datatype specifying the relationship between itemhandle and the item you want to find. See the table in Usage note for a list of valid values.

itemhandle

A long for the handle of an item related via navigationcode to the item for which you are searching.


Return value

Long.

Returns the item handle if it succeeds and -1 if an error occurs.

Usage

FindItem does not select the item it finds. You must use the item's selected property in conjunction with FindItem to select the result of the FindItem search.

FindItem never finds a collapsed item, except when looking for ChildTreeItem!, which causes an item to expand. CurrentItem! is not changed until after the clicked event occurs. To return the correct handle for the current item when the user clicks it, create a custom event to return the handle and post it in the clicked event.

If navigationcode is RootTreeItem!, FirstVisibleTreeItem!, CurrentTreeItem!, or DropHighlightTreeItem!, set itemhandle to 0.

The following table shows valid values for the navigationcode argument.

Navigationcode value

What FindItem finds

RootTreeItem!

The first item at level 1. Returns -1 if no items have been inserted into the control.

NextTreeItem!

The sibling after itemhandle. A sibling is an item at the same level with the same parent. Returns -1 if there are no more siblings.

PreviousTreeItem!

The sibling before itemhandle. Returns -1 if there are no more siblings.

ParentTreeItem!

The parent of itemhandle. Returns -1 if the item is at level 1.

ChildTreeItem!

The first child of itemhandle. If the item is collapsed, ChildtreeItem! causes the node to expand. Returns -1 if the item has no children or if the item is not populated yet.

FirstVisibleTreeItem!

The first item visible in the control, regardless of level. The position of the scroll bar determines the first visible item.

NextVisibleTreeItem!

The next expanded item after itemhandle, regardless of level. The NextVisible and PreviousVisible values allow you to walk through all the visible children and branches of an expanded node. Returns -1 if the item is the last expanded item in the control.

To scroll to an item that is beyond the reach of the visible area of the control, use FindItem and then SelectItem.

PreviousVisibleTreeItem!

The next expanded item before itemhandle, regardless of level. Returns -1 if the item is the first root item.

CurrentTreeItem!

The selected item. Returns -1 if the control never had focus and nothing has been selected.

DropHighlightTreeItem!

The item whose DropHighlighted property was most recently set. Returns -1 if the property was never set or if it has been set back to false because of other activity in the control.


Examples

To return the correct handle when the current item is clicked, place this code in a custom event that is posted in the item's clicked event:

long ll_tvi
ll_tvi = tv_list.FindItem(CurrentTreeItem!, 0)

This example finds the first item on the first level of a TreeView control:

long ll_tvi
ll_tvi = tv_list.FindItem(RootTreeItem!, 0)

See also

DeleteItem

GetItem

InsertItem

SelectItem