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reactos/dll/win32/comctl32/theme_combo.c

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/*
* Theming - Combo box control
*
* Copyright (c) 2005 by Frank Richter
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
*/
#include "comctl32.h"
WINE_DEFAULT_DEBUG_CHANNEL(themingcombo);
/* Subclass-private state flags */
#define STATE_NOREDRAW 1
#define STATE_HOT 2
/* some constants for metrics, same as in user32 */
#define COMBO_XBORDERSIZE 2
#define COMBO_YBORDERSIZE 2
#define COMBO_EDITBUTTONSPACE 0
#define EDIT_CONTROL_PADDING 1
/* paint text of combobox, needed for read-only drop downs. */
static void paint_text (HWND hwnd, HDC hdc, DWORD dwStyle, const COMBOBOXINFO *cbi)
{
INT id, size = 0;
LPWSTR pText = NULL;
UINT itemState = ODS_COMBOBOXEDIT;
HFONT font = (HFONT)SendMessageW (hwnd, WM_GETFONT, 0, 0);
HFONT hPrevFont = (font) ? SelectObject(hdc, font) : 0;
RECT rectEdit;
BOOL focused = GetFocus () == hwnd;
BOOL dropped = cbi->stateButton == STATE_SYSTEM_PRESSED;
TRACE("\n");
/* follow Windows combobox that sends a bunch of text
* inquiries to its listbox while processing WM_PAINT. */
if( (id = SendMessageW (cbi->hwndList, LB_GETCURSEL, 0, 0) ) != LB_ERR )
{
size = SendMessageW (cbi->hwndList, LB_GETTEXTLEN, id, 0);
if (size == LB_ERR)
FIXME("LB_ERR probably not handled yet\n");
if( (pText = HeapAlloc( GetProcessHeap(), 0, (size + 1) * sizeof(WCHAR))) )
{
/* size from LB_GETTEXTLEN may be too large, from LB_GETTEXT is accurate */
size = SendMessageW (cbi->hwndList, LB_GETTEXT, id, (LPARAM)pText);
pText[size] = '\0'; /* just in case */
} else return;
}
else
if( !(dwStyle & (CBS_OWNERDRAWFIXED | CBS_OWNERDRAWVARIABLE)) )
return;
/*
* Give ourselves some space.
*/
rectEdit = cbi->rcItem;
InflateRect( &rectEdit, -1, -1 );
if(dwStyle & (CBS_OWNERDRAWFIXED | CBS_OWNERDRAWVARIABLE))
{
DRAWITEMSTRUCT dis;
HRGN clipRegion;
UINT ctlid = (UINT)GetWindowLongPtrW( hwnd, GWLP_ID );
/* setup state for DRAWITEM message. Owner will highlight */
if ( focused && !dropped )
itemState |= ODS_SELECTED | ODS_FOCUS;
/*
* Save the current clip region.
* To retrieve the clip region, we need to create one "dummy"
* clip region.
*/
clipRegion = CreateRectRgnIndirect(&rectEdit);
if (GetClipRgn(hdc, clipRegion)!=1)
{
DeleteObject(clipRegion);
clipRegion=NULL;
}
if (!IsWindowEnabled(hwnd)) itemState |= ODS_DISABLED;
dis.CtlType = ODT_COMBOBOX;
dis.CtlID = ctlid;
dis.hwndItem = hwnd;
dis.itemAction = ODA_DRAWENTIRE;
dis.itemID = id;
dis.itemState = itemState;
dis.hDC = hdc;
dis.rcItem = rectEdit;
dis.itemData = SendMessageW(cbi->hwndList, LB_GETITEMDATA, id, 0);
/*
* Clip the DC and have the parent draw the item.
*/
IntersectClipRect(hdc,
rectEdit.left, rectEdit.top,
rectEdit.right, rectEdit.bottom);
SendMessageW(GetParent (hwnd), WM_DRAWITEM, ctlid, (LPARAM)&dis );
/*
* Reset the clipping region.
*/
SelectClipRgn(hdc, clipRegion);
}
else
{
static const WCHAR empty_stringW[] = { 0 };
if ( focused && !dropped ) {
/* highlight */
FillRect( hdc, &rectEdit, GetSysColorBrush(COLOR_HIGHLIGHT) );
SetBkColor( hdc, GetSysColor( COLOR_HIGHLIGHT ) );
SetTextColor( hdc, GetSysColor( COLOR_HIGHLIGHTTEXT ) );
}
ExtTextOutW( hdc,
rectEdit.left + 1,
rectEdit.top + 1,
ETO_OPAQUE | ETO_CLIPPED,
&rectEdit,
pText ? pText : empty_stringW , size, NULL );
if ( focused && !dropped )
DrawFocusRect( hdc, &rectEdit );
}
if( hPrevFont )
SelectObject(hdc, hPrevFont );
HeapFree( GetProcessHeap(), 0, pText );
}
/* paint the combobox */
static LRESULT paint (HTHEME theme, HWND hwnd, HDC hParamDC, ULONG state)
{
PAINTSTRUCT ps;
HDC hDC;
COMBOBOXINFO cbi;
DWORD dwStyle = GetWindowLongW (hwnd, GWL_STYLE);
hDC = (hParamDC) ? hParamDC
: BeginPaint( hwnd, &ps);
TRACE("hdc=%p\n", hDC);
if( hDC && !(state & STATE_NOREDRAW) )
{
RECT frameRect;
int buttonState;
cbi.cbSize = sizeof (cbi);
SendMessageW (hwnd, CB_GETCOMBOBOXINFO, 0, (LPARAM)&cbi);
/* paint border */
if ((dwStyle & CBS_DROPDOWNLIST) != CBS_SIMPLE)
GetClientRect (hwnd, &frameRect);
else
{
frameRect = cbi.rcItem;
InflateRect(&frameRect,
EDIT_CONTROL_PADDING + COMBO_XBORDERSIZE,
EDIT_CONTROL_PADDING + COMBO_YBORDERSIZE);
}
DrawThemeBackground (theme, hDC, 0,
IsWindowEnabled (hwnd) ? CBXS_NORMAL : CBXS_DISABLED, &frameRect, NULL);
/* paint button */
if (cbi.stateButton != STATE_SYSTEM_INVISIBLE)
{
if (!IsWindowEnabled (hwnd))
buttonState = CBXS_DISABLED;
else if (cbi.stateButton == STATE_SYSTEM_PRESSED)
buttonState = CBXS_PRESSED;
else if (state & STATE_HOT)
buttonState = CBXS_HOT;
else
buttonState = CBXS_NORMAL;
DrawThemeBackground (theme, hDC, CP_DROPDOWNBUTTON, buttonState,
&cbi.rcButton, NULL);
}
/* paint text, if we need to */
if ((dwStyle & CBS_DROPDOWNLIST) == CBS_DROPDOWNLIST)
paint_text (hwnd, hDC, dwStyle, &cbi);
}
if( !hParamDC )
EndPaint(hwnd, &ps);
return 0;
}
/**********************************************************************
* The combo control subclass window proc.
*/
LRESULT CALLBACK THEMING_ComboSubclassProc (HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam,
ULONG_PTR dwRefData)
{
const WCHAR* themeClass = WC_COMBOBOXW;
HTHEME theme;
LRESULT result;
switch (msg)
{
case WM_CREATE:
result = THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
OpenThemeData( hwnd, themeClass );
return result;
case WM_DESTROY:
theme = GetWindowTheme( hwnd );
CloseThemeData ( theme );
return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
case WM_THEMECHANGED:
theme = GetWindowTheme( hwnd );
CloseThemeData ( theme );
OpenThemeData( hwnd, themeClass );
break;
case WM_SYSCOLORCHANGE:
theme = GetWindowTheme( hwnd );
if (!theme) return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
/* Do nothing. When themed, a WM_THEMECHANGED will be received, too,
* which will do the repaint. */
break;
case WM_PAINT:
theme = GetWindowTheme( hwnd );
if (!theme) return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
return paint (theme, hwnd, (HDC)wParam, dwRefData);
case WM_SETREDRAW:
/* Since there doesn't seem to be WM_GETREDRAW, do redraw tracking in
* the subclass as well. */
if( wParam )
dwRefData &= ~STATE_NOREDRAW;
else
dwRefData |= STATE_NOREDRAW;
THEMING_SetSubclassData (hwnd, dwRefData);
return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
case WM_MOUSEMOVE:
{
/* Dropdown button hot-tracking */
COMBOBOXINFO cbi;
POINT pt;
pt.x = (short)LOWORD(lParam);
pt.y = (short)HIWORD(lParam);
cbi.cbSize = sizeof (cbi);
SendMessageW (hwnd, CB_GETCOMBOBOXINFO, 0, (LPARAM)&cbi);
if (cbi.stateButton != STATE_SYSTEM_INVISIBLE)
{
if (PtInRect (&cbi.rcButton, pt))
{
if (!(dwRefData & STATE_HOT))
{
dwRefData |= STATE_HOT;
THEMING_SetSubclassData (hwnd, dwRefData);
RedrawWindow (hwnd, &cbi.rcButton, 0,
RDW_INVALIDATE | RDW_UPDATENOW);
}
}
else
{
if (dwRefData & STATE_HOT)
{
dwRefData &= ~STATE_HOT;
THEMING_SetSubclassData (hwnd, dwRefData);
RedrawWindow (hwnd, &cbi.rcButton, 0,
RDW_INVALIDATE | RDW_UPDATENOW);
}
}
}
}
return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
default:
/* Call old proc */
return THEMING_CallOriginalClass (hwnd, msg, wParam, lParam);
}
return 0;
}
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