Date: 02-16-2022
Return to Index
created by gbSnippets
'Given a node in the TreeView, this snippet returns the next node in the tree.
'Primary Code:
'returns node one down from the specified Node
'returns 0 if does not exist
Function OneNodeDown(ByVal hNode As DWord) as DWord
Local iReturn As DWord
' Do
TreeView Get Child hDlg, %IDC_TreeView, hNode To iReturn 'get child (1st choice)
If iReturn = 0 Then TreeView Get Next hDlg, %IDC_TreeView, hNode To iReturn 'or sibling (2nd choice)
If iReturn = 0 Then 'no child or sibling
Do 'get sibling of first parent with sibling
TreeView Get Parent hDlg, %IDC_TreeView, hNode To hNode 'parent
TreeView Get Next hDlg, %IDC_TreeView, hNode To iReturn 'sibling child of parent
Loop Until iReturn Or (hNode = 0) 'stop when find sibling of parent with sibling, or no more choices
End If
hNode = iReturn 'possible values: 0, zero (no parent/no sibling), <>0 (parent or sibling)
If hNode Then TreeView Select hDlg, %IDC_TreeView, hNode : Sleep 300 'for demo only - selection/pause is optional
Function = hNode
' Loop While hNode
End Function
'Compilable Example: (Jose Includes)
#Compiler PBWin 9, PBWin 10
#Compile EXE
#Dim All
%Unicode=1
#Include "Win32API.inc"
%IDC_TreeView = 100 : %IDC_Button = 200
Global hDlg as DWord
Function PBMain() As Long
Local hItem As DWord, hTemp As DWord, hTemp2 As DWord, hTemp3 As DWord
Dialog New Pixels, 0, "TreeView",200,200,155,250, %WS_SysMenu, 0 To hDlg
Control Add TreeView, hDlg, %IDC_TreeView, "", 10,10,130,200
Control Add Button, hDlg, %IDC_Button,"Start", 25,220,95,20
TreeView Insert Item hDlg, %IDC_TreeView, 0, %TVI_Last, 0,0,"Root" To hItem
TreeView Insert Item hDlg, %IDC_TreeView, hItem, %TVI_Last, 0,0,"Mother" To hTemp
TreeView Insert Item hDlg, %IDC_TreeView, hTemp, %TVI_Last, 0,0,"Dan" To hTemp2
TreeView Insert Item hDlg, %IDC_TreeView, hTemp, %TVI_Last, 0,0,"Bob" To hTemp3
TreeView Set Expanded hDlg, %IDC_TreeView, hTemp, %True
TreeView Insert Item hDlg, %IDC_TreeView, hTemp3, %TVI_Last, 0,0,"Foot" To hTemp2
TreeView Insert Item hDlg, %IDC_TreeView, hTemp3, %TVI_Last, 0,0,"Arm" To hTemp2
TreeView Set Expanded hDlg, %IDC_TreeView, hTemp3, %True
TreeView Insert Item hDlg, %IDC_TreeView, hItem, %TVI_Last, 0,0,"Father" To hTemp
TreeView Insert Item hDlg, %IDC_TreeView, hTemp, %TVI_Last, 0,0,"Helen" To hTemp2
TreeView Insert Item hDlg, %IDC_TreeView, hTemp, %TVI_Last, 0,0,"Any" To hTemp3
TreeView Set Expanded hDlg, %IDC_TreeView, hTemp, %True
TreeView Insert Item hDlg, %IDC_TreeView, hTemp3, %TVI_Last, 0,0,"Leg" To hTemp2
TreeView Insert Item hDlg, %IDC_TreeView, hTemp3, %TVI_Last, 0,0,"Finger" To hTemp2
TreeView Set Expanded hDlg, %IDC_TreeView, hTemp3, %True
TreeView Set Expanded hDlg, %IDC_TreeView, hItem, %True
Dialog Show Modal hDlg Call DlgProc
End Function
CallBack Function DlgProc() As Long
Local hNode As DWord, temp$
If CB.Msg = %WM_Command AND CB.Ctl = %IDC_Button Then
TreeView Get Select CB.Hndl, %IDC_TreeView To hNode
hNode = OneNodeDown(hNode)
TreeView Get Text hDlg, %IDC_TreeView, hNode TO temp$
MsgBox temp$
End If
End Function
Function OneNodeDown(ByVal hNode As DWord) as DWord
'returns node one down from the specified Node
'returns 0 if does not exist
Local iReturn As DWord
' Do
TreeView Get Child hDlg, %IDC_TreeView, hNode To iReturn 'get child (1st choice)
If iReturn = 0 Then TreeView Get Next hDlg, %IDC_TreeView, hNode To iReturn 'or sibling (2nd choice)
If iReturn = 0 Then 'no child or sibling
Do 'get sibling of first parent with sibling
TreeView Get Parent hDlg, %IDC_TreeView, hNode To hNode 'parent
TreeView Get Next hDlg, %IDC_TreeView, hNode To iReturn 'sibling child of parent
Loop Until iReturn Or (hNode = 0) 'stop when find sibling of parent with sibling, or no more choices
End If
hNode = iReturn 'possible values: 0, zero (no parent/no sibling), <>0 (parent or sibling)
If hNode Then TreeView Select hDlg, %IDC_TreeView, hNode : Sleep 300 'for demo only - selection/pause is optional
Function = hNode
' Loop While hNode
End Function
'gbs_00279
'Date: 03-10-2012
http://www.garybeene.com/sw/gbsnippets.htm