clear dropdown field

[DataLife]

After selecting an item in the dropdown list, I need to click a button and clear the selected item. It is called the Edit Field on a combobox. I don't need to clear the items in the dropdown list only clear what is visable in the dropdown list (non-editable) box.

Code: Select all

Gui, add, dropdownlist,,item1|item2|item3
Gui, add, button,gclear,Clear selected Dropdown item
gui, show, autosize
return


clear:
GuiControl,text,combobox1
return

[A_AhkUser]

Hi DataLife,

Use Control, Delete:

Code: Select all

Gui, Add, DDL, vDDL hwndDDL_ID +AltSubmit, item1|item2|item3 ;  if the control has the AltSubmit property, the output variable will receive the item's position number
Gui, Add, Button, gClear, &Clear selected Dropdown item
Gui, Show, Autosize
return


clear:
GuiControlGet, DDL ; retieve the item's position number
Control, Delete, %DDL%,, % "ahk_id " . DDL_ID ; to operate upon a control's HWND (window handle), leave the Control parameter blank and specify ahk_id %ControlHwnd% for the WinTitle parameter 
return

[DataLife]

Hi DataLife,

Use Control, Delete:

Code: Select all

Gui, Add, DDL, vDDL hwndDDL_ID +AltSubmit, item1|item2|item3 ;  if the control has the AltSubmit property, the output variable will receive the item's position number
Gui, Add, Button, gClear, &Clear selected Dropdown item
Gui, Show, Autosize
return


clear:
GuiControlGet, DDL ; retieve the item's position number
Control, Delete, %DDL%,, % "ahk_id " . DDL_ID ; to operate upon a control's HWND (window handle), leave the Control parameter blank and specify ahk_id %ControlHwnd% for the WinTitle parameter 
return

I don't want to delete the item from the dropdown list. I only want to clear it from the "dropdown field".
Here is step by step what I want.

1. Create a dropdownlist with 3 items.
2. Show it with a GUI.
3. Select anyone of the 3 items. That item shows up on the "dropdown field"
4. I will operate on that item at some point in my script. After I operate on that item I want to clear that item from the "dropdown field". I do not want to delete it from the dropdown list.

[DataLife]

I finally found the solution here.
https://autohotkey.com/board/topic/2128 ... ntry139519

I give the dropdownlist a hwnd ID, then use

Code: Select all

SendMessage, 0x014E, -1, 0,, ahk_id %DDL_ID%

[jeeswg]

Interesting, thanks for sharing.

CB_SETCURSEL := 0x14E

CB_SETCURSEL message (Windows)
https://msdn.microsoft.com/en-us/librar ... s.85).aspx

[just me]

Code: Select all

Gui, Add, DDL, vMyDDL, item1|item2|item3
Gui, Add, button, gClear, Clear selected Dropdown item
Gui, Show, w400 h300, Test
Return

GuiClose:
ExitApp

Clear:
GuiControl, Choose , MyDDL, 0
Return

GuiControl, Choose, ControlID, N: Sets the selection in a ListBox, DropDownList, ComboBox, or Tab control to be the Nth entry. N should be 1 for the first entry, 2 for the second, etc. If N is not an integer, the ChooseString method described below will be used instead. [v1.1.06+]: If N is zero, the ListBox, DropDownList or ComboBox's current selection is removed.

[DataLife]

Code: Select all

Gui, Add, DDL, vMyDDL, item1|item2|item3
Gui, Add, button, gClear, Clear selected Dropdown item
Gui, Show, w400 h300, Test
Return

GuiClose:
ExitApp

Clear:
GuiControl, Choose , MyDDL, 0
Return

GuiControl, Choose, ControlID, N: Sets the selection in a ListBox, DropDownList, ComboBox, or Tab control to be the Nth entry. N should be 1 for the first entry, 2 for the second, etc. If N is not an integer, the ChooseString method described below will be used instead. [v1.1.06+]: If N is zero, the ListBox, DropDownList or ComboBox's current selection is removed.

Of course it was right there in front of me. I read so much that if I felt I was going down the wrong path I would quit reading. That is why I missed "If N is zero, the ListBox, DropDownList or ComboBox's current selection is removed."

thanks
DataLife