/
Class_TransparentListBox.ahk
386 lines (386 loc) · 21 KB
/
Class_TransparentListBox.ahk
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; ======================================================================================================================
; Namespace: TransparentListBox
; AHK version: AHK 1.1.13.00
; Function: Helper object for transparent ListBoxes
; Language: English
; Tested on: Win XP (U32) & Win7 x64 (U64)
; Version: 0.1.00.00/2013-10-03/just me - Initial release.
; ======================================================================================================================
; CLASS TransparentListBox
;
; The class provides transparent background for ListBox controls. The whole stuff is done by subclassing the control.
;
; On creation via 'TLB := New TranparentListBox' you have to pass the HWNDs of the ListBox and the underlying control
; or window. Additionally you may pass a text color and a seperate color to draw selected items with. Colors have to
; be passed as RGB integer values.
;
; After you've changed the content or size of the ListBox, or if you want to change the text or selection color, you
; have to call 'TLB.Update()' once, passing the new color values if desired. Thw whole action should be enclosed by
; two calls of 'TLB.SetRedraw(False/True)' to avoid flickering as far as possible.
;
; Due to the complex way ListBoxes do their scrolling not all options of a common ListBox are supported.
; You have to keep in mind the following restrictions:
; - The new object instance has to be created before the Gui is shown.
; - The ListBox must not have a horizontal scroll bar (because I haven't a clue how to do the scrolling).
; - The Multi(select) option is not supported as yet (but it may be feasible).
; - Scrolling is not 'smooth'.
; ======================================================================================================================
Class TransparentListBox {
; -------------------------------------------------------------------------------------------------------------------
; Constructor
; -------------------------------------------------------------------------------------------------------------------
__New(HLB, HBG, TxtColor := "", SelColor := "", SelBkGnd := "", SelBkTrans := 255) {
; ----------------------------------------------------------------------------------------------------------------
; HLB : HWND of the ListBox.
; HBG : HWND of the control or Gui containing the background.
; TxtColor : Optional - Text color (RGB integer value, e.g. 0xRRGGBB).
; SelColor : Optional - Selected text color (RGB integer value, e.g. 0xRRGGBB).
; SelBkGnd : Optional - Color of the selection rectangel (RGB integer value, e.g. 0xRRGGBB).
; SelBkTrans : Optional - Transparency of the selection rectangle (0 - 255).
; ----------------------------------------------------------------------------------------------------------------
Static LB_GETCOUNT := 0x018B, LB_GETITEMRECT := 0x0198, WM_GETFONT := 0x0031
This.HLB := HLB
This.HBG := HBG
This.Parent := DllCall("User32.dll\GetParent", "Ptr", HLB, "UPtr")
This.CtrlID := DllCall("User32.dll\GetDlgCtrlID", "Ptr", HLB, "UPtr")
HDC := DllCall("User32.dll\GetDC", "Ptr", HLB, "UPtr")
If (TxtColor <> "")
This.TxtColor := ((TxtColor >> 16) & 0xFF) | (TxtColor & 0x00FF00) | ((TxtColor & 0xFF) << 16)
Else
This.TxtColor := DllCall("Gdi32.dll\GetTextColor", "Ptr", HDC, "UInt")
If (SelColor <> "")
This.SelColor := ((SelColor >> 16) & 0xFF) | (SelColor & 0x00FF00) | ((SelColor & 0xFF) << 16)
If (SelBkGnd <> "") {
This.SelBkGnd := ((SelBkGnd >> 16) & 0xFF) | (SelBkGnd & 0x00FF00) | ((SelBkGnd & 0xFF) << 16)
This.SelBkTrans := (SelBkTrans & 0xFF)
}
DllCall("User32.dll\ReleaseDC", "Ptr", HLB, "Ptr", HDC)
VarSetCapacity(RECT, 16, 0)
SendMessage, %LB_GETITEMRECT%, 0, % &RECT, , ahk_id %HLB%
This.ItemWidth := NumGet(RECT, 8, "Int") - NumGet(RECT, 0, "Int")
This.ItemHeight := NumGet(RECT, 12, "Int") - NumGet(RECT, 4, "Int")
SendMessage, %LB_GETCOUNT%, 0, 0, , ahk_id %HLB%
This.ItemCount := ErrorLevel
SendMessage, %WM_GETFONT%, 0, 0, , ahk_id %HLB%
This.Font := ErrorLevel
ControlGet, Content, List, , , ahk_id %HLB%
This.Items := StrSplit(Content, "`n")
This.HasBackground := False
This.TopIndex := This.CurSel := -1
This.Drawing := True
VarSetCapacity(SI, 28, 0) ; SCROLLINFO
NumPut(28, SI, 0, "UInt") ; cbSize
NumPut(3, SI, 4, "UInt") ; fMask = SIF_RANGE | SIF_PAGE
DllCall("User32.dll\GetScrollInfo", "Ptr", HLB, "Int", 1, "Ptr", &SI)
This.SIMin := NumGet(SI, 8, "Int") ; nMin
This.SIMax := NumGet(SI, 12, "Int") ; nMax
This.SIPage := NumGet(SI, 16, "UInt") ; nPage
SCCB := RegisterCallback("TransparentListBox.SubClassCallback")
DllCall("Comctl32.dll\SetWindowSubclass", "Ptr", HLB, "Ptr", SCCB, "Ptr", HLB, "Ptr", &This)
This.SCCB := SCCB
}
; -------------------------------------------------------------------------------------------------------------------
; Destructor
; -------------------------------------------------------------------------------------------------------------------
__Delete() {
Static SRCCOPY := 0x00CC0020
If (This.BMPDC) {
BGDC := DllCall("User32.dll\GetDC", "Ptr", This.HBG, "UPtr")
DllCall("Gdi32.dll\BitBlt", "Ptr", BGDC, "Int", This.Left, "Int", This.Top, "Int", This.Width
, "Int", This.Height, "Ptr", This.BMPDC, "Int", 0, "Int", 0, "UInt", SRCCOPY)
DllCall("User32.dll\ReleaseDC", "Ptr", This.HBG, "Ptr", BGDC)
DllCall("Gdi32.dll\DeleteDC", "Ptr", This.BMPDC)
DllCall("Gdi32.dll\DeleteObject", "Ptr", This.HBMP)
This.BMPDC := This.HBMP := 0
}
If (This.SELDC) {
DllCall("Gdi32.dll\DeleteDC", "Ptr", This.SELDC)
DllCall("Gdi32.dll\DeleteObject", "Ptr", This.HSEL)
}
If (This.HLB) {
DllCall("Comctl32.dll\RemoveWindowSubclass", "Ptr", This.HLB, "Ptr", This.SCCB, "Ptr", This.HLB)
}
}
; -------------------------------------------------------------------------------------------------------------------
; Subclass callback function - for internal use only
; -------------------------------------------------------------------------------------------------------------------
SubClassCallback(uMsg, wParam, lParam, IdSubclass, RefData) {
Critical 100
hWnd := This ; first parameter 'hWnd' is passed as 'This'
Return Object(RefData).SubClassProc(hWnd, uMsg, wParam, lParam)
}
; -------------------------------------------------------------------------------------------------------------------
; Subclassproc - for internal use only
; -------------------------------------------------------------------------------------------------------------------
SubClassProc(hWnd, uMsg, wParam, lParam) {
Static LB := {GETCOUNT: 0x018B, GETCURSEL: 0x0188, GETITEMRECT: 0x0198, GETTEXT: 0x0189,GETTEXTLEN: 0x018A
, GETTOPINDEX: 0x018E, ITEMFROMPOINT: 0x01A9, SETCURSEL: 0x0186}
Static LBN := {SELCHANGE: 1, DBLCLK: 2}
Static WM := {DESTROY: 0x0002, DRAWITEM: 0x002B, LBUTTONDBLCLK: 0x0203, ERASEBKGND: 0x0014, HSCROLL: 0x0114
, KEYDOWN: 0x0100, KILLFOCUS: 0x0008, LBUTTONDOWN: 0x0201, LBUTTONUP: 0x0202, MOUSEWHEEL: 0x020A
, PAINT: 0x000F, SETFOCUS: 0x0007, SETREDRAW: 0x000B, VSCROLL: 0x0115}
Static VK := {DOWN: 0x28, END: 0x23, HOME: 0x24, NEXT: 0x22, PRIOR: 0x21, UP: 0x26
, 0x21: 1, 0x22: 1, 0x23: 1, 0x24: 1, 0x26: 1, 0x28: 1}
Static SRCCOPY := 0x00CC0020
Static DrawingMsg := ""
; ----------------------------------------------------------------------------------------------------------------
; Painting
; ----------------------------------------------------------------------------------------------------------------
; WM_PAINT message
If (uMsg = WM.PAINT) {
VarSetCapacity(PAINTSTRUCT, A_PtrSize + (4 * 7) + 32 + (A_PtrSize - 4), 0)
LBDC := DllCall("USer32.dll\BeginPaint", "Ptr", This.HLB, "Ptr", &PAINTSTRUCT, "UPtr")
SendMessage, % LB.GETCURSEL, 0, 0, , ahk_id %hWnd%
CurSel := ErrorLevel
SendMessage, % LB.GETTOPINDEX, 0, 0, , ahk_id %hWnd%
TopIndex := ErrorLevel
This.TopIndex := TopIndex
This.CurSel := CurSel
DllCall("Gdi32.dll\BitBlt", "Ptr", LBDC, "Int", 0, "Int", 0, "Int", This.Width, "Int", This.Height
, "Ptr", This.BMPDC, "Int", 0, "Int", 0, "UInt", SRCCOPY)
HFONT := DllCall("Gdi32.dll\SelectObject", "Ptr", LBDC, "Ptr", This.Font, "UPtr")
DllCall("Gdi32.dll\SetBkMode", "Ptr", LBDC, "Int", 1) ; TRANSPARENT
VarSetCapacity(RECT, 16, 0)
SendMessage, % LB.GETITEMRECT, %TopIndex%, &RECT, , ahk_id %hWnd%
While (TopIndex < This.ItemCount) && (NumGet(RECT, 12, "Int") <= This.Height) {
If (This.SELDC) && (TopIndex = CurSel) {
L := NumGet(RECT, 0, "Int"), T := NumGet(RECT, 4, "Int")
W := NumGet(RECT, 8, "Int") - L, H := NumGet(RECT, 12, "Int") - T
If (This.SelBkTrans = 255)
DllCall("Gdi32.dll\BitBlt", "Ptr", LBDC, "Int", L, "Int", T, "Int", W, "Int", H
, "Ptr", This.SELDC, "Int", 0, "Int", 0, "UInt", SRCCOPY)
Else
DllCall("Gdi32.dll\GdiAlphaBlend", "Ptr", LBDC, "Int", L, "Int", T, "Int", W, "Int", H
, "Ptr", This.SELDC, "Int", 0, "Int", 0, "Int", W, "Int", H
, "UInt", (This.SelBkTrans << 16))
}
Txt := This.Items[TopIndex + 1], Len := StrLen(Txt)
TextColor := (TopIndex = CurSel ? This.SelColor : This.TxtColor)
DllCall("Gdi32.dll\SetTextColor", "Ptr", LBDC, "UInt", TextColor)
NumPut(NumGet(RECT, 0, "Int") + 3, RECT, 0, "Int")
DllCall("User32.dll\DrawText", "Ptr", LBDC, "Ptr", &Txt, "Int", Len, "Ptr", &RECT, "UInt", 0x0840)
NumPut(NumGet(RECT, 0, "Int") - 3, RECT, 0, "Int")
DllCall("User32.dll\OffsetRect", "Ptr", &RECT, "Int", 0, "Int", This.ItemHeight)
TopIndex++
}
DllCall("Gdi32.dll\SelectObject", "Ptr", LBDC, "Ptr", HFONT, "UPtr")
DllCall("User32.dll\EndPaint", "Ptr", &PAINTSTRUCT)
Return 0
}
; WM_ERASEBKGND message
If (uMsg = WM.ERASEBKGND) {
If (!This.HasBackground) { ; processed once after creation/update
VarSetCapacity(RECT, 16, 0)
DllCall("User32.dll\GetClientRect", "Ptr", This.HLB, "Ptr", &RECT)
This.Width := W := NumGet(RECT, 8, "Int")
This.Height := H := NumGet(RECT, 12, "Int")
DllCall("User32.dll\ClientToScreen", "Ptr", This.HLB, "Ptr", &RECT)
DllCall("User32.dll\ScreenToClient", "Ptr", This.HBG, "Ptr", &RECT)
This.Left := L := NumGet(RECT, 0, "Int")
This.Top := T := NumGet(RECT, 4, "Int")
BGDC := DllCall("User32.dll\GetDC", "Ptr", This.HBG, "UPtr")
BMPDC := DllCall("Gdi32.dll\CreateCompatibleDC", "Ptr", BGDC, "UPtr")
HBMP := DllCall("Gdi32.dll\CreateCompatibleBitmap", "Ptr", BGDC, "Int", W, "Int", H, "UPtr")
DllCall("Gdi32.dll\SelectObject", "Ptr", BMPDC, "Ptr", HBMP)
DllCall("Gdi32.dll\BitBlt", "Ptr", BMPDC, "Int", 0, "Int", 0, "Int", W, "Int", H
, "Ptr", BGDC, "Int", L, "Int", T, "UInt", SRCCOPY)
If (This.SelBkGnd <> "") {
SELDC := DllCall("Gdi32.dll\CreateCompatibleDC", "Ptr", BGDC, "UPtr")
HSEL := DllCall("Gdi32.dll\CreateCompatibleBitmap", "Ptr", BGDC, "Int", This.ItemWidth
, "Int", This.ItemHeight, "UPtr")
DllCall("Gdi32.dll\SelectObject", "Ptr", SELDC, "Ptr", HSEL)
Brush := DllCall("Gdi32.dll\CreateSolidBrush", "UInt", This.SelBkGnd, "UPtr")
VarSetCapacity(RECT, 16, 0)
NumPut(This.ItemWidth, RECT, 8, "Int")
NumPut(This.ItemHeight, RECT, 12, "Int")
DllCall("User32.dll\FillRect", "Ptr", SELDC, "Ptr", &RECT, "Ptr", Brush)
DllCall("Gdi32.dll\DeleteObject", "Ptr", Brush)
This.SELDC := SELDC
This.HSEL := HSEL
}
DllCall("User32.dll\ReleaseDC", "Ptr", This.HBG, "Ptr", BGDC)
This.BMPDC := BMPDC
This.HBMP := HBMP
LBDC := DllCall("User32.dll\GetDC", "Ptr", hWnd, "UPtr")
DllCall("Gdi32.dll\BitBlt", "Ptr", LBDC, "Int", 0, "Int", 0, "Int", W, "Int", H
, "Ptr", This.BMPDC, "Int", 0, "Int", 0, "UInt", SRCCOPY)
DllCall("User32.dll\ReleaseDC", "Ptr", hWnd, "Ptr", LBDC)
This.HasBackground := True
}
Return True
}
; ----------------------------------------------------------------------------------------------------------------
; Selection & Focus
; ----------------------------------------------------------------------------------------------------------------
; WM_KILLFOCUS and WM_SETFOCUS messages
If (uMsg = WM.KILLFOCUS) Or (uMsg = WM.SETFOCUS) { ; not processed
Return 0
}
; LB_SETCURSEL message
If (uMsg = LB.SETCURSEL) {
If (This.Drawing) {
DrawingMsg := uMsg
This.SetRedraw(False)
}
DllCall("Comctl32.dll\DefSubclassProc", "Ptr", hWnd, "UInt", uMsg, "Ptr", wParam, "Ptr", lParam)
If (DrawingMsg = LB.SETCURSEL) {
This.SetRedraw(True)
DrawingMsg := ""
}
SendMessage, % LB.GETTOPINDEX, 0, 0, , ahk_id %hWnd%
TopIndex := ErrorLevel
DllCall("User32.dll\SetScrollPos", "Ptr", hWnd, "Int", 1, "Int", TopIndex, "UInt", True)
Return 0
}
; ----------------------------------------------------------------------------------------------------------------
; Keyboard
; ----------------------------------------------------------------------------------------------------------------
; WM_KEYDOWN message
If (uMsg = WM.KEYDOWN) {
If VK.HasKey(wParam) {
CurSel := This.CurSel
CurSel := (wParam = VK.DOWN) ? (CurSel + 1)
: (wParam = VK.UP) ? (CurSel - 1)
: (wParam = VK.Next) ? (CurSel + This.SIPage)
: (wParam = VK.PRIOR) ? (CurSel - This.SIPage)
: (wParam = VK.HOME) ? This.SIMin
: (wParam = VK.END) ? This.SIMax
: CurSel
CurSel := (CurSel < This.SIMin) ? This.SIMin : (CurSel > This.SIMax) ? This.SIMax : CurSel
If (Cursel <> This.Cursel) {
If (This.Drawing) {
DrawingMsg := uMsg
This.SetRedraw(False)
}
SendMessage, % LB.SETCURSEL, %CurSel%, 0, , ahk_id %hWnd%
If (DrawingMsg = WM.KEYDOWN) {
This.SetRedraw(True)
DrawingMsg := ""
}
PostMessage, 0x0111, % (This.CtrlID | (LBN.SELCHANGE << 16)), %hWnd%, , % "ahk_id " . This.Parent
This.Cursel := CurSel
}
}
Return 0
}
; ----------------------------------------------------------------------------------------------------------------
; Mouse
; ----------------------------------------------------------------------------------------------------------------
; WM_LBUTTONDOWN message
If (uMsg = WM.LBUTTONDOWN) {
ControlFocus, , ahk_id %hWnd%
Return 0
}
; WM_LBUTTONUP message
If (uMsg = WM.LBUTTONUP) {
SendMessage, % LB.ITEMFROMPOINT, 0, %lParam%, , ahk_id %hWnd%
Item := ErrorLevel
If !(Item & 0xFFFF0000) && (Item <> This.CurSel) {
If (This.Drawing) {
DrawingMsg := uMsg
This.SetRedraw(False)
}
SendMessage, % LB.SETCURSEL, %Item%, 0, , ahk_id %hWnd%
If (DrawingMsg = WM.LBUTTONUP) {
This.SetRedraw(True)
DrawingMsg := ""
}
This.Cursel := Item
PostMessage, 0x0111, % (This.CtrlID | (LBN.SELCHANGE << 16)), %hWnd%, , % "ahk_id " . This.Parent
}
Return 0
}
; WM_LBUTTONDBLCLK message
If (uMsg = WM.LBUTTONDBLCLK) {
PostMessage, 0x0111, % (This.CtrlID | (LBN.DBLCLK << 16)), %hWnd%, , % "ahk_id " . This.Parent
Return 0
}
; WM_MOUSEWHEEL message
If (uMsg = WM.MOUSEWHEEL) {
Delta := (wParam >> 16) & 0xFFFF
If ((Delta <= 0x7FFF) && (This.TopIndex > This.SIMin))
Or ((Delta > 0x7FFF) && ((This.TopIndex + This.SIPage) <= This.SIMax))
PostMessage, % WM.VSCROLL, % (Delta > 0x7FFF ? 1 : 0), 0, , ahk_id %hWnd%
Return 0
}
; ----------------------------------------------------------------------------------------------------------------
; Scrolling
; ----------------------------------------------------------------------------------------------------------------
; WM_HCROLL message
If (uMsg = WM.HSCROLL) {
Return 0
}
; WM_VSCROLL message
If (uMsg = WM.VSCROLL) {
If (((wParam = 1) || (wParam = 3) || (wParam = 7)) && ((This.TopIndex + This.SIPage) > This.SIMax))
Or (((wParam = 0) || (wParam = 2) || (wParam = 6)) && (This.TopIndex <= This.SIMin))
Or (wParam = 8) || (wParam = 4)
Return 0
If (This.Drawing) {
DrawingMsg := uMsg
This.SetRedraw(False)
}
DllCall("Comctl32.dll\DefSubclassProc", "Ptr", hWnd, "UInt", uMsg, "Ptr", wParam, "Ptr", lParam)
If (DrawingMsg = WM.VSCROLL) {
This.SetRedraw(True)
DrawingMsg := ""
}
SendMessage, % LB.GETTOPINDEX, 0, 0, , ahk_id %hWnd%
This.TopIndex := ErrorLevel
; Seems that you must not return here, because DefSubClassProc apparently updates the scroll bar
; position on the second call!!!
}
; ----------------------------------------------------------------------------------------------------------------
; Destroy
; ----------------------------------------------------------------------------------------------------------------
; WM_DESTROY message
If (uMsg = WM.DESTROY) {
This.__Delete()
}
Return DllCall("Comctl32.dll\DefSubclassProc", "Ptr", hWnd, "UInt", uMsg, "Ptr", wParam, "Ptr", lParam)
}
; -------------------------------------------------------------------------------------------------------------------
; Update the instance variables
; -------------------------------------------------------------------------------------------------------------------
UpDate(TxtColor := "", SelColor := "", SelBkGnd := "", SelBkTrans := "") {
; ----------------------------------------------------------------------------------------------------------------
; Optional TxtColor : New text color (RGB integer value, e.g. 0xRRGGBB).
; Optional SelColor : New selected text color (RGB integer value, e.g. 0xRRGGBB).
; Changes of the content or the size of the ListBox will be processed automatically.
; ----------------------------------------------------------------------------------------------------------------
Drawing := This.Drawing
If (Drawing)
This.SetRedraw(False)
This.__Delete()
If (TxtColor = "")
If (This.TxtColor)
TxtColor := ((This.TxtColor >> 16) & 0xFF) | (This.TxtColor & 0x00FF00) | ((This.TxtColor & 0xFF) << 16)
If (SelColor = "")
If (This.SelColor)
SelColor := ((This.SelColor >> 16) & 0xFF) | (This.SelColor & 0x00FF00) | ((This.SelColor & 0xFF) << 16)
If (SelBkGnd = "")
If (This.SelBkGnd)
SelBkGnd := ((This.SelBkGnd >> 16) & 0xFF) | (This.SelBkGnd & 0x00FF00) | ((This.SelBkGnd & 0xFF) << 16)
If (SelBkTrans = "")
If (This.SelBkTrans)
SelBkTrans := This.SelBkTrans
This.__New(This.HLB, This.HBG, TxtColor, SelColor, SelBkGnd, SelBkTrans)
If (Drawing)
This.SetRedraw(True)
Return True
}
; -------------------------------------------------------------------------------------------------------------------
; Set Redrawing True/False
; -------------------------------------------------------------------------------------------------------------------
SetRedraw(Mode) {
; It's highly recommended to call this function instead of using GuiControl, -/+Redraw,
; because the drawing state will be stored internally for use by other methods.
Static WM_SETREDRAW := 0x000B
Mode := !!Mode
This.Drawing := Mode
SendMessage, %WM_SETREDRAW%, %Mode%, 0, , % "ahk_id " . This.HLB
If (Mode)
WinSet, Redraw, , % "ahk_id " . This.HLB
Return True
}
}