Enable AutoSort in ComboBoxGadget

Shardik · Post by **Shardik** » Sun Apr 10, 2011 1:57 pm

If you are in need to display the entries of your ComboBox in sorted
order, MacOS X 10.2 and later offers you the possibility to automatically
sort your ComboBox items. Another goodie in the following example
code demonstrates how to programmatically open the drop down list of
your ComboBox. Unfortunately the example only works for editable
ComboBoxes (with the flag #PB_ComboBox_Editable) because the
underlying API element is a HIComboBox which offers the described
features. PB's non-editable ComboBox utilizes a PopupButton control
which doesn't support these features.

Code: Select all

ImportC ""
  HIComboBoxChangeAttributes(HIViewRef.L, AttributesToSet.L, AttributesToClear.L)
  HIComboBoxSetListVisible(HIViewRef.L, Visible.L)
EndImport

#kHIComboBoxAutoSortAttribute = 1 << 2

OpenWindow(0, 200, 100, 200, 130, "ComboBoxGadget")
ComboBoxGadget(0, 10, 10, WindowWidth(0) - 20, 100, #PB_ComboBox_Editable)

; ----- Activate ComboBox AutoSort Feature

HIComboBoxChangeAttributes(GadgetID(0), #kHIComboBoxAutoSortAttribute, 0)

; ----- Add unsorted entries

AddGadgetItem(0, -1, "Entry 2")
AddGadgetItem(0, -1, "Entry 4")
AddGadgetItem(0, -1, "Entry 3")
AddGadgetItem(0, -1, "Entry 1")

; ----- Open drop down list programmatically

HIComboBoxSetListVisible(GadgetID(0), #True)

Repeat
Until WaitWindowEvent() = #PB_Event_CloseWindow