Date: 02-16-2022
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created by gbSnippets
'Given a node in the TreeView, this snippet walks through the rest
'of the Tree and expands/collapses all nodes it finds. Start at the
'root to expand/collapse all nodes.
'Primary Code - Expand Tree
Sub TreeNodeExpandCollapse(ByVal hNode as Dword, Flag&)
'Flag& = %True-Expand, %False-Collapse
Local iReturn As Dword, hStartNode as Dword
hStartNode = hNode
Do
TreeView Set Expanded hDlg, %IDC_TreeView, hNode, Flag& '%True-Expand, %False-Collapse
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
If hNode = hStartNode Then iReturn = 0 : Exit Loop 'if reach starting node, stop
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)
Loop While hNode
End Sub
'Compilable Example: (Jose Includes)
#Compiler PBWin 9, PBWin 10
#Compile EXE
#Dim All
%Unicode=1
#Include "Win32API.inc"
%IDC_TreeView = 100 : %IDC_ButtonE = 200 : %IDC_ButtonC = 201
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",200,200,155,300, %WS_SysMenu, 0 To hDlg
Control Add TreeView, hDlg, %IDC_TreeView, "", 10,10,130,200
Control Add Button, hDlg, %IDC_ButtonE,"Expand", 25,220,95,20
Control Add Button, hDlg, %IDC_ButtonC,"Collapse", 25,250,95,20
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
If CB.Msg = %WM_Command AND CB.Ctl = %IDC_ButtonE Then
TreeView Get Select hDlg, %IDC_TreeView To hNode
TreeNodeExpandCollapse(hNode, %True)
End If
If CB.Msg = %WM_Command AND CB.Ctl = %IDC_ButtonC Then
TreeView Get Select hDlg, %IDC_TreeView To hNode
TreeNodeExpandCollapse(hNode, %False)
End If
End Function
Sub TreeNodeExpandCollapse(ByVal hNode as Dword, Flag&)
'Flag& = %True-Expand, %False-Collapse
Local iReturn As Dword, hStartNode as Dword
hStartNode = hNode
Do
TreeView Set Expanded hDlg, %IDC_TreeView, hNode, Flag& '%True-Expand, %False-Collapse
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
If hNode = hStartNode Then iReturn = 0 : Exit Loop 'if reach starting node, stop
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)
Loop While hNode
End Sub
'gbs_00268
'Date: 03-10-2012
http://www.garybeene.com/sw/gbsnippets.htm