WildByDesign Posted 1 hour ago Posted 1 hour ago I've seen many ListView header subclassing examples in the forum that use CUSTOMDRAW to change colors with SetTextColor and SetBkColor. But I'm wondering, is it technically possible to color the background of LV header items with _WinAPI_CreateSolidBrush and _WinAPI_FillRect while setting the background mix mode with _WinAPI_SetBkMode to transparent? This would, of course, require the text color to be changed with _WinAPI_SetTextColor and drawn with _WinAPI_DrawText. I'm just not even sure if this is possible with CUSTOMDRAW because I simply don't have much experience with it. My biggest problem and misunderstanding is that I don't know how to get the rectangle sizes to start with to even test whether or not the FillRect will work. I will share an example that @UEZ shared as SampleControls.au3 in Dark Mode but I have chopped it down to only what is required for ListView to keep the script as small as possible. The ListView header subclassing is done in the _SubclassProc function at line 147 in this example. As always, thank you so much for your time and help. expandcollapse popup; Coded by UEZ build 2025-12-18 beta ; not DPI aware! #include <APIConstants.au3> #include <ListViewConstants.au3> #include <WinAPIConstants.au3> #include <WinAPIGdi.au3> #include <WinAPIShellEx.au3> #include <WinAPISys.au3> #include <WinAPITheme.au3> Enum $APPMODE_FORCEDARK ; Dark Mode Colors (RGB) Global Const $COLOR_BG_DARK = 0x202020 Global Const $COLOR_TEXT_LIGHT = 0xFFFFFF Global Const $COLOR_EDIT_BG = 0x1E1E1E ; Global variables for subclassing (MUST be declared before _Example()!) Global $g_hGUI = 0, $g_ListView Global $g_aControls[50][3] = [[0, 0, 0]] ; [ControlID, hWnd, OldWndProc] Global $g_iControlCount = 0 Global $g_pSubclassProc = 0 ; Structure for NM_CUSTOMDRAW notification Global Const $tagNMCUSTOMDRAW = _ $tagNMHDR & ";" & _ ; Contains NM_CUSTOMDRAW / NMHDR header among other things "dword dwDrawStage;" & _ ; Current drawing stage (CDDS_*) "handle hdc;" & _ ; Device Context Handle "long left;long top;long right;long bottom;" & _ ; Drawing rectangle "dword_ptr dwItemSpec;" & _ ; Item index or other info (depending on the control) "uint uItemState;" & _ ; State Flags (CDIS_SELECTED, CDIS_FOCUS etc.) "lparam lItemlParam" ; lParam set by the item (e.g., via LVITEM.lParam) _Example() Func _Example() #Region GUI $g_hGUI = GUICreate("Sample GUI with Dark Mode", 400, 400) GUISetBkColor($COLOR_BG_DARK, $g_hGUI) #EndRegion GUI #Region LIST VIEW Local $idListView = GUICtrlCreateListView("Sample|ListView|", 10, 10, 380, 380, -1, BitOR($LVS_EX_DOUBLEBUFFER, $LVS_EX_FULLROWSELECT, $WS_EX_CLIENTEDGE)) _AddControlForSubclass($idListView) GUICtrlSetBkColor($idListView, $COLOR_EDIT_BG) GUICtrlSetColor($idListView, $COLOR_TEXT_LIGHT) GUICtrlSetTip(-1, '#Region LIST VIEW') GUICtrlCreateListViewItem("A|One", $idListView) GUICtrlCreateListViewItem("B|Two", $idListView) GUICtrlCreateListViewItem("C|Three", $idListView) $g_ListView = GUICtrlGetHandle($idListView) #EndRegion LIST VIEW ; Apply Dark Mode _ApplyDarkModeToAllControls() GUISetState(@SW_SHOW) While 1 Switch GUIGetMsg() Case $GUI_EVENT_CLOSE _CleanupSubclassing() ExitLoop EndSwitch WEnd GUIDelete() EndFunc ;==>_Example Func _ColorToCOLORREF($iColor) ;RGB to BGR Local $iR = BitAND(BitShift($iColor, 16), 0xFF) Local $iG = BitAND(BitShift($iColor, 8), 0xFF) Local $iB = BitAND($iColor, 0xFF) Return BitOR(BitShift($iB, -16), BitShift($iG, -8), $iR) EndFunc ;==>_ColorToCOLORREF Func _AddControlForSubclass($iCtrlID) Local $hCtrl = GUICtrlGetHandle($iCtrlID) If $hCtrl Then $g_aControls[$g_iControlCount][0] = $iCtrlID $g_aControls[$g_iControlCount][1] = $hCtrl $g_aControls[$g_iControlCount][2] = 0 ; Placeholder for OldWndProc $g_iControlCount += 1 EndIf EndFunc ;==>_AddControlForSubclass Func _ApplyDarkModeToAllControls() ; DWM Dark Mode for the main window _WinAPI_SetPreferredAppMode($APPMODE_FORCEDARK) ; Create subclass callback If Not $g_pSubclassProc Then $g_pSubclassProc = DllCallbackRegister("_SubclassProc", "lresult", "hwnd;uint;wparam;lparam;uint_ptr;dword_ptr") ; Subclass all controls Local $hCtrl, $sClass, $hEdit, $hComboLBox, $hHeader, $hUpDown For $i = 0 To $g_iControlCount - 1 $hCtrl = $g_aControls[$i][1] If $hCtrl Then $sClass = _WinAPI_GetClassName($hCtrl) ; Use SetWindowSubclass _WinAPI_SetWindowSubclass($hCtrl, DllCallbackGetPtr($g_pSubclassProc), $i, 0) ; Special themes for different control types Switch StringLower($sClass) Case "syslistview32" _WinAPI_SetWindowTheme($hCtrl, "DarkMode_Explorer", 0) ; Also make the ListView header dark $hHeader = _SendMessage($hCtrl, $LVM_GETHEADER, 0, 0) If $hHeader Then _WinAPI_SetWindowTheme($hHeader, "DarkMode_ItemsView", 0) EndIf Case Else _WinAPI_SetWindowTheme($hCtrl, "DarkMode_Explorer", 0) EndSwitch _WinAPI_AllowDarkModeForWindow($hCtrl, True) EndIf Next ; Update theme system _WinAPI_RefreshImmersiveColorPolicyState() _WinAPI_FlushMenuThemes() _WinAPI_DwmSetWindowAttribute($g_hGUI, $DWMWA_USE_IMMERSIVE_DARK_MODE, True) ; Redraw GUI _WinAPI_RedrawWindow($g_hGUI, 0, 0, $RDW_UPDATENOW) EndFunc ;==>_ApplyDarkModeToAllControls Func _CleanupSubclassing() ; Remove all subclasses If $g_pSubclassProc Then Local $hCtrl For $i = 0 To $g_iControlCount - 1 $hCtrl = $g_aControls[$i][1] If $hCtrl Then _WinAPI_RemoveWindowSubclass($hCtrl, DllCallbackGetPtr($g_pSubclassProc), $i) EndIf Next DllCallbackFree($g_pSubclassProc) $g_pSubclassProc = 0 EndIf EndFunc ;==>_CleanupSubclassing Func _SubclassProc($hWnd, $iMsg, $wParam, $lParam, $iID, $pData) Switch $iMsg Case $WM_NOTIFY Local $tNMHDR = DllStructCreate($tagNMHDR, $lParam) Local $hFrom = $tNMHDR.hWndFrom Local $iCode = $tNMHDR.Code ; --- Adjust ListView Header text color --- If $iCode = $NM_CUSTOMDRAW Then Local $tNMCUSTOMDRAW = DllStructCreate($tagNMCUSTOMDRAW, $lParam) Local $dwDrawStage = $tNMCUSTOMDRAW.dwDrawStage Local $hDC = $tNMCUSTOMDRAW.hdc Switch $dwDrawStage Case $CDDS_PREPAINT Return $CDRF_NOTIFYITEMDRAW Case $CDDS_ITEMPREPAINT _WinAPI_SetTextColor($hDC, _ColorToCOLORREF($COLOR_TEXT_LIGHT)) ; White text _WinAPI_SetBkColor($hDC, _ColorToCOLORREF($COLOR_BG_DARK)) ; Dark background Return BitOR($CDRF_NEWFONT, $CDRF_NOTIFYPOSTPAINT) EndSwitch EndIf Case $WM_PAINT ; Custom Paint for better Dark Mode rendering Return _WinAPI_DefSubclassProc($hWnd, $iMsg, $wParam, $lParam) EndSwitch ; Forward standard message to DefSubclassProc Return _WinAPI_DefSubclassProc($hWnd, $iMsg, $wParam, $lParam) EndFunc ;==>_SubclassProc Func _WinAPI_FindWindowEx($hParent, $hAfter, $sClass, $sTitle = "") Local $ret = DllCall("user32.dll", "hwnd", "FindWindowExW", "hwnd", $hParent, "hwnd", $hAfter, "wstr", $sClass, "wstr", $sTitle) If @error Or Not IsArray($ret) Then Return 0 Return $ret[0] EndFunc ;==>_WinAPI_FindWindowEx Func _WinAPI_AllowDarkModeForWindow($hWND, $bAllow = True) Local $aResult = DllCall("UxTheme.dll", "bool", 133, "hwnd", $hWND, "bool", $bAllow) If @error Then Return SetError(1, 0, False) Return ($aResult[0] <> 0) EndFunc ;==>_WinAPI_AllowDarkModeForWindow Func _WinAPI_FlushMenuThemes() Local $aResult = DllCall("UxTheme.dll", "none", 136) If @error Then Return SetError(1, 0, False) Return True EndFunc ;==>_WinAPI_FlushMenuThemes Func _WinAPI_RefreshImmersiveColorPolicyState() Local $aResult = DllCall("UxTheme.dll", "none", 104) If @error Then Return SetError(1, 0, False) Return True EndFunc ;==>_WinAPI_RefreshImmersiveColorPolicyState Func _WinAPI_SetPreferredAppMode($iPreferredAppMode) ;Windows 10 Build 18362+ Local $aResult = DllCall("UxTheme.dll", "long", 135, "long", $iPreferredAppMode) If @error Then Return SetError(1, 0, False) Return $aResult[0] EndFunc ;==>_WinAPI_SetPreferredAppMode #EndRegion DarkMode API
WildByDesign Posted 1 hour ago Author Posted 1 hour ago By the way, the reason why I would like to trying using FillRect/SetBkMode is because I am trying to apply Windows 11 materials to all controls in another app (Files Au3), with the exception of the header seen in the screenshot below. Files Au3 uses a detached header. But I figured that it might be easier to share an example of a ListView header since that is much more common. Anyway, I just wanted to give a bit of reason for why I am trying to do this.
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