Using listview groups?

[Justin]

anyone knows how they work?, at msdn in the LVM_INSERTGROUP says you can't insert a group in a empty listview. how are you suposed to work?, insert item, insert group, insert item in group? sounds like crap, any hint?

http://msdn.microsoft.com/library/en-us ... tgroup.asp

[Sparkie]

One year late, but here's some code to get you started. This is my first attempt at ListIconGadget Groups, so there's plenty room for improvement.

WinXP with Skins enabled is Required.

Code: Select all

; *****************************************************************
; ************ Requires WinXP with Skins enabled ******************
; *****************************************************************
#LVM_FIRST = $1000
#LVM_SETGROUPMETRICS = #LVM_FIRST + 155
#LVM_ENABLEGROUPVIEW = #LVM_FIRST + 157
#LVM_INSERTGROUP = #LVM_FIRST + 145
#LVGF_HEADER = 1
#LVGF_ALIGN = 8
#LVGF_STATE = 4
#LVGF_GROUPID = $10
#LVGMF_BORDERCOLOR = 2
#LVGMF_BORDERSIZE = 1
#LVGMF_NONE = 0
#LVGMF_TEXTCOLOR = 4
#LVGA_HEADER_CENTER = 2
#LVGA_HEADER_LEFT = 1
#LVGA_HEADER_RIGHT = 4
#LVIF_GROUPID = $100
#LVIF_IMAGE = 2
#LVIF_TEXT = 1

; --> Structure used tp define Group
Structure myLVGROUP
  cbSize.l
  mask.l
  pszHeader.l
  cchHeader.l
  pszFooter.l
  cchFooter.l
  iGroupId.l
  stateMask.l
  state.l
  uAlign.l
EndStructure
lvGroup.myLVGROUP

; --> Structure used for placing item into it's Group
Structure myLVITEM
  mask.l 
  iItem.l 
  iSubItem.l 
  state.l 
  stateMask.l 
  pszText.l 
  cchTextMax.l 
  iImage.l 
  lParam.l
  iIndent.l
  iGroupId.l
  cColumns.l
  puColumns.l
EndStructure
lvitemgroup.myLVITEM

; --> Structure used for changing Group colors
Structure myLVGROUPMETRICS
 cbSize.l 
 mask.l 
 left.l 
 top.l 
 right.l 
 bottom.l 
 crLeft.l 
 crTop.l 
 crRight.l
 crBottom.l
 crHeader.l
 crFooter.l
EndStructure
lvGM.myLVGROUPMETRICS

; --> Create 3 Group images
redImg = CreateImage(0, 16, 16)
StartDrawing(ImageOutput())
Box(0, 0, 16, 16, RGB(255, 0, 0))
StopDrawing()

greenImg = CreateImage(1, 16, 16)
StartDrawing(ImageOutput())
Box(0, 0, 16, 16, RGB(0, 255, 0))
StopDrawing()

blueImg = CreateImage(2, 16, 16)
StartDrawing(ImageOutput())
Box(0, 0, 16, 16, RGB(0, 0, 255))
StopDrawing()

If OpenWindow(0, 0, 0, 500, 300, #PB_Window_SystemMenu | #PB_Window_ScreenCentered, "ListIconGadget Groups") And CreateGadgetList(WindowID(0)) 
  ListIconGadget(0, 10, 10, 480, 280, "", 200)
  ChangeListIconGadgetDisplay(0, 1)
  For i = 0 To 3
    item$ = "Item " + Str(i)
    AddGadgetItem(0 , i, item$, redImg)
  Next  i
  For i = 4 To 7
    item$ = "Item " + Str(i)
    AddGadgetItem(0 , i, item$, greenImg)
  Next  i
  For i = 8 To 11
    item$ = "Item " + Str(i)
    AddGadgetItem(0 , i, item$, blueImg)
  Next  i
  ; --> Enable Group view
  SendMessage_(GadgetID(0), #LVM_ENABLEGROUPVIEW , #True, 0)
  lvGroup\cbSize = SizeOf(myLVGROUP)
  lvGroup\mask = #LVGF_HEADER | #LVGF_GROUPID | #LVGF_ALIGN 
  ; --> Create Group 0
  group$ = "Red Group"
  sLen = MultiByteToWideChar_(#CP_ACP, 0, group$, -1, 0, 0)
  GroupName$ = Space(sLen*2)
  MultiByteToWideChar_(#CP_ACP, 0, group$, -1, @GroupName$, sLen)
  lvGroup\pszHeader = @GroupName$
  lvGroup\cchHeader = sLen*2
  lvGroup\iGroupId = 0
  lvGroup\uAlign = #LVGA_HEADER_LEFT
  SendMessage_(GadgetID(0), #LVM_INSERTGROUP, 0, lvGroup)
  ; --> Create Group 1
  group$ = "Green Group"
  sLen = MultiByteToWideChar_(#CP_ACP, 0, group$, -1, 0, 0)
  GroupName$ = Space(sLen*2)
  MultiByteToWideChar_(#CP_ACP, 0, group$, -1, @GroupName$, sLen)
  lvGroup\pszHeader = @GroupName$
  lvGroup\cchHeader = sLen*2
  lvGroup\iGroupId = 1
  lvGroup\uAlign = #LVGA_HEADER_LEFT
  SendMessage_(GadgetID(0), #LVM_INSERTGROUP, 1, lvGroup)
  ; --> Create Group 2
  group$ = "Blue Group"
  sLen = MultiByteToWideChar_(#CP_ACP, 0, group$, -1, 0, 0)
  GroupName$ = Space(sLen*2)
  MultiByteToWideChar_(#CP_ACP, 0, group$, -1, @GroupName$, sLen)
  lvGroup\pszHeader = @GroupName$
  lvGroup\cchHeader = sLen*2
  lvGroup\iGroupId = 2
  lvGroup\uAlign = #LVGA_HEADER_LEFT
  SendMessage_(GadgetID(0), #LVM_INSERTGROUP, 2, lvGroup)
  ; --> Change Group header text color
  ; --> AFAIK, Group Metrics applies to all Groups
  lvGM\cbSize = SizeOf(myLVGROUPMETRICS)
  lvGM\mask = #LVGMF_TEXTCOLOR
  lvGM\crHeader = RGB(100, 50, 100)
  SendMessage_(GadgetID(0), #LVM_SETGROUPMETRICS, 0, lvGM)
  ; --> Place items 0 - 3 into Group 0
  For r = 0 To 3
    lvitemgroup\mask = #LVIF_GROUPID
    lvitemgroup\iItem = r
    lvitemgroup\iGroupId = 0
    SendMessage_(GadgetID(0), #LVM_SETITEM, r, lvitemgroup)
  Next r
  ; --> Place items 4 - 7 into Group 1
  For g = 4 To 7
    lvitemgroup\mask = #LVIF_GROUPID
    lvitemgroup\iItem = g
    lvitemgroup\iGroupId = 1
    SendMessage_(GadgetID(0), #LVM_SETITEM, g, lvitemgroup)
  Next g
  ; --> Place items 8 - 11 into Group 2
  For b = 8 To 11
    lvitemgroup\mask = #LVIF_GROUPID
    lvitemgroup\iItem = b
    lvitemgroup\iGroupId = 2
    SendMessage_(GadgetID(0), #LVM_SETITEM, b, lvitemgroup)
  Next b
  Repeat : Until WaitWindowEvent() = #PB_Event_CloseWindow 
EndIf 

[Fred]

Looks pretty