Cross-platform column justification of ListIconGadget

[Shardik]

My last cross-platform code example is from 2012 and therefore still contains MacOS code for the Carbon framework. The last PureBasic version which is able to run this code example on MacOS is PB 5.11 with subsystem "Carbon". Although I already posted this link inside this thread to a Cocoa solution, for your convenience I have now replaced the Carbon part by the linked Cocoa part so that this example is now working with current PB versions on MacOS (tested successfully on MacOS 10.6.8 'Snow Leopard' with PB 5.44 x86 in both ASCII and Unicode mode and on MacOS 10.9.5 'Mavericks' with PB 5.44 x86 and x64 in both ASCII and Unicode mode).

Furthermore I have included Charly's suggested change in order to be able to run the example on Linux with both GTK2 and GTK3 (Thank you for that hint, Charly!).

Code: Select all

EnableExplicit

CompilerSelect #PB_Compiler_OS
  CompilerCase #PB_OS_Linux
    ImportC ""
      g_object_set_double(*Object, Property.P-ASCII, Value.D,
        Null) As "g_object_set"
      gtk_cell_layout_get_cells(*CellLayout)
      gtk_tree_view_column_set_alignment(*TreeColumn.GtkTreeViewColumn,
        Alignment.F)
    EndImport
CompilerEndSelect

Enumeration
  #PB_ListIcon_JustifyColumnLeft
  #PB_ListIcon_JustifyColumnCenter
  #PB_ListIcon_JustifyColumnRight
EndEnumeration

Procedure SetListIconColumnJustification(ListIconID.I, Column.I, Alignment.I)
  CompilerSelect #PB_Compiler_OS
    CompilerCase #PB_OS_Linux
      Protected AlignmentFactor.F
      Protected *CellRenderers
      Protected *Column
      Protected Count.I
      Protected i.I

      Select Alignment
        Case #PB_ListIcon_JustifyColumnLeft
          AlignmentFactor = 0.0
        Case #PB_ListIcon_JustifyColumnCenter
          AlignmentFactor = 0.5
        Case #PB_ListIcon_JustifyColumnRight
          AlignmentFactor = 1.0
      EndSelect

      *Column = gtk_tree_view_get_column_(GadgetID(ListIconID), Column)

      If *Column
        gtk_tree_view_column_set_alignment(*Column, AlignmentFactor)
        *CellRenderers = gtk_cell_layout_get_cells(*Column)

        If *CellRenderers
          Count = g_list_length_(*CellRenderers)

          For i = 0 To Count - 1
            g_object_set_double(g_list_nth_data_(*CellRenderers, i), "xalign",
              AlignmentFactor, #Null)
          Next i         

          g_list_free_(*CellRenderers)
        EndIf
      EndIf
    CompilerCase #PB_OS_MacOS
      Protected ColumnHeaderCell.I
      Protected ColumnObject.I
      Protected ColumnObjectArray.I

      Select Alignment
        Case #PB_ListIcon_JustifyColumnLeft
          Alignment = #NSLeftTextAlignment
        Case #PB_ListIcon_JustifyColumnCenter
          Alignment = #NSCenterTextAlignment
        Case #PB_ListIcon_JustifyColumnRight
          Alignment = #NSRightTextAlignment
      EndSelect

      ; ----- Justify text of column cells
      CocoaMessage(@ColumnObjectArray, GadgetID(ListIconID), "tableColumns")
      CocoaMessage(@ColumnObject, ColumnObjectArray, "objectAtIndex:", Column)
      CocoaMessage(0, CocoaMessage(0, ColumnObject, "dataCell"), "setAlignment:", Alignment)
      
      ; ----- Justify text of column header
      CocoaMessage(@ColumnHeaderCell, ColumnObject, "headerCell")
      CocoaMessage(0, ColumnHeaderCell, "setAlignment:", Alignment)
      
      ; ----- Redraw ListIcon contents to see change
      CocoaMessage(0, GadgetID(ListIconID), "reloadData")
    CompilerCase #PB_OS_Windows
      Protected ListIconColumn.LV_COLUMN

      ListIconColumn\mask = #LVCF_FMT

      Select Alignment
        Case #PB_ListIcon_JustifyColumnLeft
          ListIconColumn\fmt = #LVCFMT_LEFT
        Case #PB_ListIcon_JustifyColumnCenter
          ListIconColumn\fmt = #LVCFMT_CENTER
        Case #PB_ListIcon_JustifyColumnRight
          ListIconColumn\fmt = #LVCFMT_RIGHT
      EndSelect

      SendMessage_(GadgetID(ListIconID), #LVM_SETCOLUMN, Column, @ListIconColumn)
  CompilerEndSelect
EndProcedure

OpenWindow(0, 200, 100, 445, 90, "Right justify 1st column")
ListIconGadget(0, 5, 5, 435, 80, "Name", 110)
AddGadgetColumn(0, 1, "Address", 300)
AddGadgetItem(0, -1, "Harry Rannit" + #LF$ + "12 Parliament Way, Battle Street, By the Bay")
AddGadgetItem(0, -1, "Ginger Brokeit" + #LF$ + "130 PureBasic Road, BigTown, CodeCity")

SetListIconColumnJustification(0, 0, #PB_ListIcon_JustifyColumnRight)

Repeat
Until WaitWindowEvent() = #PB_Event_CloseWindow

Update: I have added the corrected GTK API function gtk_tree_view_column_set_alignment(*TreeColumn, Alignment.F) to the Linux ImportC block because the predefined PureBasic function declares incorrectly Alignment as Integer which resulted in missing header alignment when run on Linux. Thank you to eck49 for reporting the problem!

[eck49]

@Shardik
Thanks for this code, which is just what I want, except that the alignment of the headers seems to be displaced. Help!

Linux, Ubuntu 16.04 not sure which gtk flavour, PB 5.70.

Using the code from the 2/2/2017 post in this thread, but adapting the test code at the bottom to this

Code: Select all

OpenWindow(0, 200, 100, 999, 350, "Show Listicon justifications")
ListIconGadget(0, 5, 5, 835, 80, "Name", 110)
AddGadgetColumn(0, 1, "Address", 350)
AddGadgetColumn(0, 2, "Phone", 200)
AddGadgetColumn(0, 3, "--", 20)
AddGadgetItem(0, -1, "Harry Rannit" + #LF$ + "12 Parliament Way, Battle Street, By the Bay" + #LF$ + "45678")
AddGadgetItem(0, -1, "Ginger Brokeit" + #LF$ + "130 PureBasic Road, BigTown, CodeCity" + #LF$ + "678 998")

SetListIconColumnJustification(0, 0, #PB_ListIcon_JustifyColumnRight)
SetListIconColumnJustification(0, 1, #PB_ListIcon_JustifyColumnCenter)
SetListIconColumnJustification(0, 2, #PB_ListIcon_JustifyColumnLeft)

ListIconGadget(1, 5, 100, 835, 80, "Who", 110)
AddGadgetColumn(1, 1, "Where", 350)
AddGadgetColumn(1, 2, "Number", 200)
AddGadgetColumn(1, 3, "--", 20)
AddGadgetItem(1, -1, "Roger Bodgedit" + #LF$ + "999 Duff Place, Codswallop" + #LF$ + "07777 45678")
AddGadgetItem(1, -1, "Fred Fixedit" + #LF$ + "White House, NotThatOne, Gleeful" + #LF$ + "Fortify 245")

SetListIconColumnJustification(1, 2, #PB_ListIcon_JustifyColumnRight)
SetListIconColumnJustification(1, 1, #PB_ListIcon_JustifyColumnCenter)
SetListIconColumnJustification(1, 0, #PB_ListIcon_JustifyColumnLeft)

Repeat
Until WaitWindowEvent() = #PB_Event_CloseWindow

(In each case the last column, col3, is just a dummy to guarantee the whole of col2 is visible).

The listicon headers are justified thus:
Upper col0 Left, cols 1&2 Centre
Lower col0 Centre col1 Right and the header text for col2 is nowhere to be seen.

If I change the order of the second set of calls to the natural order, 0,1,2 instead of 2,1,0 both listicons are affected.
Upper col0 Left, col1 Right, col2 Centre
Lower col0 Left, col1 Left, col2 Centre

In every case the data items are aligned as intended, it is only the headers which are not.
The C importation is beyond my ken. Help!

[Shardik]

Thanks for this code, which is just what I want, except that the alignment of the headers seems to be displaced. Help!

You are right. The problem is a wrong internal declaration in PureBasic of the GTK API function gtk_tree_view_column_set_alignment_(*TreeColumn, xalign). Alignment has to be declared as Float in order to work correctly.

I have therefore changed my above code example from 02.02.2017 accordingly and added the corrected GTK API function gtk_tree_view_column_set_alignment(*TreeColumn, Alignment.F) to the ImportC block.

[pierre2]

Late to the party, but thank you Shardik for your cross-platform alignment code (both here, and elsewhere for TextGadgets) - exactly what I needed. Good work !

[Shardik]

Late to the party, but thank you Shardik for your cross-platform alignment code (both here, and elsewhere for TextGadgets) - exactly what I needed. Good work !

You are welcome!

[pierre2]

Using Linux Mint 21 Vannessa Mate, when I compile I get this message:

gtk_tree_view_column_set_alignment() is not a function, array, list, map or macro.

Is anyone able to point me in the right direction, please ?

[mk-soft]

ImportC forget ...

Link working code: viewtopic.php?p=566388#p566388

[pierre2]

Same thing, I'm afraid, with or without the ImportC.

[jacdelad]

@Shardik: Can I include your code from above into the next version of my LIGEnhancements-module (with a proper comment about its origin, of course)? The module itself only works for Windows right now, but who knows the future...

[Shardik]

@Shardik: Can I include your code from above into the next version of my LIGEnhancements-module (with a proper comment about its origin, of course)? The module itself only works for Windows right now, but who knows the future...

Yes, you may include the code into your LIGEnhancemant module. But on MacOS the code currently doesn't work anymore in PB 6.0 and above because Fred changed internals of the ListIconGadget cells. I have almost finished a modified version for MacOS which works both on PB 5.73 and earlier and on PB 6.0 and newer.

[jacdelad]

@Shardik: Can I include your code from above into the next version of my LIGEnhancements-module (with a proper comment about its origin, of course)? The module itself only works for Windows right now, but who knows the future...

Yes, you may include the code into your LIGEnhancemant module. But on MacOS the code currently doesn't work anymore in PB 6.0 and above because Fred changed internals of the ListIconGadget cells. I have almost finished a modified version for MacOS which works both on PB 5.73 and earlier and on PB 6.0 and newer.

Thanks!

Since my module only works on Windows right now...this is a problem for future me/you.