Re: [PB Cocoa] Methods, Tips & Tricks
Posted: Wed Apr 24, 2013 9:44 pm
Perhaps "Cocoa master" Wilbert can improve the following code even further by defining a second delegate for sorting the contents automatically. Currently my code requires you to store the ListIcon contents into the linked list Table() and to do the sorting by yourself in the procedure SortListIcon().Mindphazer wrote:I'm trying to find a way to sort a ListIconGadget when clicking on a column header...
And because of a PureBasic bug in Pseudotype P-ASCII the following code will not work in 64 bit mode with unicode enabled although in 32 bit mode with Unicode it does work. If you need 64 bit and unicode you have to use PokeS to poke the required strings with flag #PB_ASCII into a buffer and to hand over this buffer to the functions sel_registerName() and class_addMethod().
Code: Select all
EnableExplicit
ImportC ""
sel_registerName(*MethodName)
class_addMethod(Class.I, Selector.I, Implementation.I, *Types)
EndImport
Structure TableEntry
Name.S
Address.S
EndStructure
Enumeration #PB_Event_FirstCustomValue
#PB_Event_ListIcon_SortAscending
#PB_Event_ListIcon_SortDescending
EndEnumeration
Define AppDelegate.I
Define AscendingArrow.I
Define ColumnArray.I
Define DelegateClass.I
Define DescendingArrow.I
Define i.I
Define LastSortColumn.I
Define MethodName.S = "tableView:didClickTableColumn:"
Define *MethodNameBuffer
Define SortColumn.I
Define SortIsAscending.I
Define Types.S = "v@:@@"
Define *TypesBuffer
NewList Table.TableEntry()
ProcedureC LeftClickOnHeaderCellCallback(Object.I, Selector.I, View.I, Column.I)
Shared AscendingArrow.I
Shared DescendingArrow.I
Shared SortColumn.I
Shared SortIsAscending.I
SortColumn = Column
If SortIsAscending
PostEvent(#PB_Event_ListIcon_SortDescending)
Else
PostEvent(#PB_Event_ListIcon_SortAscending)
EndIf
SortIsAscending ! 1
EndProcedure
Procedure SortListIcon(ListIconID.I, SortColumn.I)
Shared Table()
Shared SortIsAscending.I
Protected ColumnIndex.I
ColumnIndex = Val(PeekS(CocoaMessage(0, CocoaMessage(0, SortColumn, "identifier"), "UTF8String"), -1, #PB_UTF8))
If SortIsAscending
If ColumnIndex = 0
SortStructuredList(Table(), #PB_Sort_Ascending, OffsetOf(TableEntry\Name), #PB_String)
Else
SortStructuredList(Table(), #PB_Sort_Ascending, OffsetOf(TableEntry\Address), #PB_String)
EndIf
Else
If ColumnIndex = 0
SortStructuredList(Table(), #PB_Sort_Descending, OffsetOf(TableEntry\Name), #PB_String)
Else
SortStructuredList(Table(), #PB_Sort_Descending, OffsetOf(TableEntry\Address), #PB_String)
EndIf
EndIf
ClearGadgetItems(ListIconID)
ForEach Table()
AddGadgetItem(ListIconID, -1, Table()\Name + #LF$ + Table()\Address)
Next
EndProcedure
*MethodNameBuffer = AllocateMemory(StringByteLength(MethodName, #PB_Ascii) + 1)
PokeS(*MethodNameBuffer, MethodName, -1, #PB_Ascii)
*TypesBuffer = AllocateMemory(StringByteLength(Types, #PB_Ascii) + 1)
PokeS(*TypesBuffer, Types, -1, #PB_Ascii)
AppDelegate = CocoaMessage(0, CocoaMessage(0, 0, "NSApplication sharedApplication"), "delegate")
DelegateClass = CocoaMessage(0, AppDelegate, "class")
class_addMethod(DelegateClass, sel_registerName(*MethodNameBuffer), @LeftClickOnHeaderCellCallback(), *TypesBuffer)
FreeMemory(*MethodNameBuffer)
FreeMemory(*TypesBuffer)
OpenWindow(0, 200, 100, 430, 95, "Sort ListIcon with column click")
ListIconGadget(0, 10, 10, WindowWidth(0) - 20, WindowHeight(0) - 20, "Name", 110)
AddGadgetColumn(0, 1, "Address", GadgetWidth(0) - GetGadgetItemAttribute(0, 0, #PB_ListIcon_ColumnWidth) - 8)
For i = 1 To 3
AddElement(Table())
Read.S Table()\Name
Read.S Table()\Address
Next i
ForEach Table()
AddGadgetItem(0, -1, Table()\Name + #LF$ + Table()\Address)
Next
AscendingArrow = CocoaMessage(0, CocoaMessage(0, 0, "NSImage imageNamed:$", @"NSAscendingSortIndicator"), "retain")
DescendingArrow = CocoaMessage(0, CocoaMessage(0, 0, "NSImage imageNamed:$", @"NSDescendingSortIndicator"), "retain")
CocoaMessage(@ColumnArray, GadgetID(0), "tableColumns")
CocoaMessage(@SortColumn, ColumnArray, "objectAtIndex:", 0)
LastSortColumn = SortColumn
SortIsAscending = #True
SortListIcon(0, SortColumn)
CocoaMessage(0, GadgetID(0), "setIndicatorImage:", AscendingArrow, "inTableColumn:", SortColumn)
CocoaMessage(0, GadgetID(0), "setDelegate:", AppDelegate)
Repeat
Select WaitWindowEvent()
Case #PB_Event_CloseWindow
Break
Case #PB_Event_ListIcon_SortAscending
If SortColumn <> LastSortColumn
CocoaMessage(0, GadgetID(0), "setIndicatorImage:", 0, "inTableColumn:", LastSortColumn)
LastSortColumn = SortColumn
EndIf
SortListIcon(0, SortColumn)
CocoaMessage(0, GadgetID(0), "setIndicatorImage:", AscendingArrow, "inTableColumn:", SortColumn)
Case #PB_Event_ListIcon_SortDescending
If SortColumn <> LastSortColumn
CocoaMessage(0, GadgetID(0), "setIndicatorImage:", 0, "inTableColumn:", LastSortColumn)
LastSortColumn = SortColumn
EndIf
SortListIcon(0, SortColumn)
CocoaMessage(0, GadgetID(0), "setIndicatorImage:", DescendingArrow, "inTableColumn:", SortColumn)
EndSelect
ForEver
End
DataSection
Data.S "Harry Rannit"
Data.S "12 Parliament Way, Battle Street, By the Bay"
Data.S "Ginger Brokeit"
Data.S "330 PureBasic Road, BigTown, CodeCity"
Data.S "Didi Foundit"
Data.S "231 Logo Drive, Mouse House, Downtown"
EndDataSectionUpdate 2: For calculating the required size of the 2 buffers *MethodNameBuffer and *TypesBuffer I have changed Len() to StringByteLength() because in Unicode mode the buffers had the double size than would have been required...
I wouldn't have found that solution on my own or would have had to search for Wilbert's fix for a long time: Thank you very much, Wilbert, you are a true genius!
