button.c

winNT技术操作系统,国外开放的原代码和LIUX一样

         break;

      case BS_BITMAP:
         flags |= DST_BITMAP;
         lp = GetWindowLongPtrW( hwnd, HIMAGE_GWL_OFFSET );
         break;

      default:
         return;
   }

   DrawStateW(hdc, hbr, lpOutputProc, lp, wp, rc->left, rc->top,
              rc->right - rc->left, rc->bottom - rc->top, flags);
   HeapFree( GetProcessHeap(), 0, text );
}

/**********************************************************************
 *       Push Button Functions
 */
static void PB_Paint( HWND hwnd, HDC hDC, UINT action )
{
    RECT     rc, focus_rect, r;
    UINT     dtFlags, uState;
    HPEN     hOldPen;
    HBRUSH   hOldBrush;
    INT      oldBkMode;
    COLORREF oldTxtColor;
    HFONT hFont;
    LONG state = get_button_state( hwnd );
    LONG style = GetWindowLongW( hwnd, GWL_STYLE );
    BOOL pushedState = (state & BUTTON_HIGHLIGHTED);
    HWND parent;

    GetClientRect( hwnd, &rc );

    /* Send WM_CTLCOLOR to allow changing the font (the colors are fixed) */
    if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
    parent = GetParent(hwnd);
    if (!parent) parent = hwnd;
    SendMessageW( parent, WM_CTLCOLORBTN, (WPARAM)hDC, (LPARAM)hwnd );
#ifdef __REACTOS__
    hOldPen = (HPEN)SelectObject(hDC, GetSysColorPen(COLOR_WINDOWFRAME));
#else
    hOldPen = (HPEN)SelectObject(hDC, SYSCOLOR_GetPen(COLOR_WINDOWFRAME));
#endif
    hOldBrush =(HBRUSH)SelectObject(hDC,GetSysColorBrush(COLOR_BTNFACE));
    oldBkMode = SetBkMode(hDC, TRANSPARENT);

    if (get_button_type(style) == BS_DEFPUSHBUTTON)
    {
        Rectangle(hDC, rc.left, rc.top, rc.right, rc.bottom);
	InflateRect( &rc, -1, -1 );
    }

    uState = DFCS_BUTTONPUSH | DFCS_ADJUSTRECT;

    if (style & BS_FLAT)
        uState |= DFCS_MONO;
    else if (pushedState)
    {
	if (get_button_type(style) == BS_DEFPUSHBUTTON )
	    uState |= DFCS_FLAT;
	else
	    uState |= DFCS_PUSHED;
    }

    if (state & (BUTTON_CHECKED | BUTTON_3STATE))
        uState |= DFCS_CHECKED;

    DrawFrameControl( hDC, &rc, DFC_BUTTON, uState );

    focus_rect = rc;

    /* draw button label */
    r = rc;
    dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &r);

    if (dtFlags == (UINT)-1L)
       goto cleanup;

    if (pushedState)
       OffsetRect(&r, 1, 1);

    IntersectClipRect(hDC, rc.left, rc.top, rc.right, rc.bottom);

    oldTxtColor = SetTextColor( hDC, GetSysColor(COLOR_BTNTEXT) );

    BUTTON_DrawLabel(hwnd, hDC, dtFlags, &r);

    SetTextColor( hDC, oldTxtColor );

    if (state & BUTTON_HASFOCUS)
    {
        InflateRect( &focus_rect, -1, -1 );
        IntersectRect(&focus_rect, &focus_rect, &rc);
        DrawFocusRect( hDC, &focus_rect );
    }

 cleanup:
    SelectObject( hDC, hOldPen );
    SelectObject( hDC, hOldBrush );
    SetBkMode(hDC, oldBkMode);
}

/**********************************************************************
 *       Check Box & Radio Button Functions
 */

static void CB_Paint( HWND hwnd, HDC hDC, UINT action )
{
    RECT rbox, rtext, client;
    HBRUSH hBrush;
    int delta;
    UINT dtFlags;
    HFONT hFont;
    LONG state = get_button_state( hwnd );
    LONG style = GetWindowLongW( hwnd, GWL_STYLE );
    HWND parent;

    if (style & BS_PUSHLIKE)
    {
        PB_Paint( hwnd, hDC, action );
	return;
    }

    GetClientRect(hwnd, &client);
    rbox = rtext = client;

    if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );

    parent = GetParent(hwnd);
    if (!parent) parent = hwnd;
    hBrush = (HBRUSH)SendMessageW(parent, WM_CTLCOLORSTATIC,
				  (WPARAM)hDC, (LPARAM)hwnd);
    if (!hBrush) /* did the app forget to call defwindowproc ? */
        hBrush = (HBRUSH)DefWindowProcW(parent, WM_CTLCOLORSTATIC,
					(WPARAM)hDC, (LPARAM)hwnd );

    if (style & BS_LEFTTEXT)
    {
	/* magic +4 is what CTL3D expects */

        rtext.right -= checkBoxWidth + 4;
        rbox.left = rbox.right - checkBoxWidth;
    }
    else
    {
        rtext.left += checkBoxWidth + 4;
        rbox.right = checkBoxWidth;
    }
 
    /* Since WM_ERASEBKGND does nothing, first prepare background */
    if (action == ODA_SELECT) FillRect( hDC, &rbox, hBrush );
    if (action == ODA_DRAWENTIRE) FillRect( hDC, &client, hBrush );

    /* Draw label */
    client = rtext;
    dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &rtext);
    
    /* Only adjust rbox when rtext is valid */
    if (dtFlags != (UINT)-1L)
    {
	rbox.top = rtext.top;
	rbox.bottom = rtext.bottom;
    }

    /* Draw the check-box bitmap */
    if (action == ODA_DRAWENTIRE || action == ODA_SELECT)
    {
	UINT flags;

	if ((get_button_type(style) == BS_RADIOBUTTON) ||
	    (get_button_type(style) == BS_AUTORADIOBUTTON)) flags = DFCS_BUTTONRADIO;
	else if (state & BUTTON_3STATE) flags = DFCS_BUTTON3STATE;
	else flags = DFCS_BUTTONCHECK;

	if (state & (BUTTON_CHECKED | BUTTON_3STATE)) flags |= DFCS_CHECKED;
	if (state & BUTTON_HIGHLIGHTED) flags |= DFCS_PUSHED;

	if (style & WS_DISABLED) flags |= DFCS_INACTIVE;

	/* rbox must have the correct height */
	delta = rbox.bottom - rbox.top - checkBoxHeight;
	
	if (style & BS_TOP) {
	    if (delta > 0) {
		rbox.bottom = rbox.top + checkBoxHeight;
	    } else { 
		rbox.top -= -delta/2 + 1;
		rbox.bottom = rbox.top + checkBoxHeight;
	    }
	} else if (style & BS_BOTTOM) {
	    if (delta > 0) {
		rbox.top = rbox.bottom - checkBoxHeight;
	    } else {
		rbox.bottom += -delta/2 + 1;
		rbox.top = rbox.bottom - checkBoxHeight;
	    }
	} else { /* Default */
	    if (delta > 0) {
		int ofs = (delta / 2);
		rbox.bottom -= ofs + 1;
		rbox.top = rbox.bottom - checkBoxHeight;
	    } else if (delta < 0) {
		int ofs = (-delta / 2);
		rbox.top -= ofs + 1;
		rbox.bottom = rbox.top + checkBoxHeight;
	    }
	}

	DrawFrameControl( hDC, &rbox, DFC_BUTTON, flags );
    }

    if (dtFlags == (UINT)-1L) /* Noting to draw */
	return;

    IntersectClipRect(hDC, client.left, client.top, client.right, client.bottom);

    if (action == ODA_DRAWENTIRE)
	BUTTON_DrawLabel(hwnd, hDC, dtFlags, &rtext);

    /* ... and focus */
    if ((action == ODA_FOCUS) ||
        ((action == ODA_DRAWENTIRE) && (state & BUTTON_HASFOCUS)))
    {
	rtext.left--;
	rtext.right++;
	IntersectRect(&rtext, &rtext, &client);
	DrawFocusRect( hDC, &rtext );
    }
}


/**********************************************************************
 *       BUTTON_CheckAutoRadioButton
 *
 * hwnd is checked, uncheck every other auto radio button in group
 */
static void BUTTON_CheckAutoRadioButton( HWND hwnd )
{
    HWND parent, sibling, start;

    parent = GetParent(hwnd);
    /* make sure that starting control is not disabled or invisible */
    start = sibling = GetNextDlgGroupItem( parent, hwnd, TRUE );
    do
    {
        if (!sibling) break;
        if ((hwnd != sibling) &&
            ((GetWindowLongW( sibling, GWL_STYLE) & 0x0f) == BS_AUTORADIOBUTTON))
            SendMessageW( sibling, BM_SETCHECK, BUTTON_UNCHECKED, 0 );
        sibling = GetNextDlgGroupItem( parent, sibling, FALSE );
    } while (sibling != start);
}


/**********************************************************************
 *       Group Box Functions
 */

static void GB_Paint( HWND hwnd, HDC hDC, UINT action )
{
    RECT rc, rcFrame;
    HBRUSH hbr;
    HFONT hFont;
    UINT dtFlags;
    TEXTMETRICW tm;
    LONG style = GetWindowLongW( hwnd, GWL_STYLE );
    HWND parent;

    if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );
    /* GroupBox acts like static control, so it sends CTLCOLORSTATIC */
    parent = GetParent(hwnd);
    if (!parent) parent = hwnd;
    hbr = (HBRUSH)SendMessageW(parent, WM_CTLCOLORSTATIC, (WPARAM)hDC, (LPARAM)hwnd);
    if (!hbr) /* did the app forget to call defwindowproc ? */
        hbr = (HBRUSH)DefWindowProcW(parent, WM_CTLCOLORSTATIC,
				     (WPARAM)hDC, (LPARAM)hwnd);

    GetClientRect( hwnd, &rc);
    rcFrame = rc;

    GetTextMetricsW (hDC, &tm);
    rcFrame.top += (tm.tmHeight / 2) - 1;
    DrawEdge (hDC, &rcFrame, EDGE_ETCHED, BF_RECT | ((style & BS_FLAT) ? BF_FLAT : 0));

    InflateRect(&rc, -7, 1);
    dtFlags = BUTTON_CalcLabelRect(hwnd, hDC, &rc);

    if (dtFlags == (UINT)-1L)
       return;

    /* Because buttons have CS_PARENTDC class style, there is a chance
     * that label will be drawn out of client rect.
     * But Windows doesn't clip label's rect, so do I.
     */

    /* There is 1-pixel marging at the left, right, and bottom */
    rc.left--; rc.right++; rc.bottom++;
    FillRect(hDC, &rc, hbr);
    rc.left++; rc.right--; rc.bottom--;

    BUTTON_DrawLabel(hwnd, hDC, dtFlags, &rc);
}


/**********************************************************************
 *       User Button Functions
 */

static void UB_Paint( HWND hwnd, HDC hDC, UINT action )
{
    RECT rc;
    HBRUSH hBrush;
    HFONT hFont;
    LONG state = get_button_state( hwnd );
    HWND parent;

    if (action == ODA_SELECT) return;

    GetClientRect( hwnd, &rc);

    if ((hFont = get_button_font( hwnd ))) SelectObject( hDC, hFont );

    parent = GetParent(hwnd);
    if (!parent) parent = hwnd;
    hBrush = (HBRUSH)SendMessageW(parent, WM_CTLCOLORBTN, (WPARAM)hDC, (LPARAM)hwnd);
    if (!hBrush) /* did the app forget to call defwindowproc ? */
        hBrush = (HBRUSH)DefWindowProcW(parent, WM_CTLCOLORBTN,
					(WPARAM)hDC, (LPARAM)hwnd);

    FillRect( hDC, &rc, hBrush );
    if ((action == ODA_FOCUS) ||
        ((action == ODA_DRAWENTIRE) && (state & BUTTON_HASFOCUS)))
        DrawFocusRect( hDC, &rc );
}


/**********************************************************************
 *       Ownerdrawn Button Functions
 */

static void OB_Paint( HWND hwnd, HDC hDC, UINT action )
{
    LONG state = get_button_state( hwnd );
    DRAWITEMSTRUCT dis;
    HRGN clipRegion;
    RECT clipRect;
    LONG_PTR id = GetWindowLongPtrW( hwnd, GWLP_ID );
    HWND parent;
    HFONT hFont, hPrevFont = 0;

    dis.CtlType    = ODT_BUTTON;
    dis.CtlID      = id;
    dis.itemID     = 0;
    dis.itemAction = action;
    dis.itemState  = ((state & BUTTON_HASFOCUS) ? ODS_FOCUS : 0) |
                     ((state & BUTTON_HIGHLIGHTED) ? ODS_SELECTED : 0) |
                     (IsWindowEnabled(hwnd) ? 0: ODS_DISABLED);
    dis.hwndItem   = hwnd;
    dis.hDC        = hDC;
    dis.itemData   = 0;
    GetClientRect( hwnd, &dis.rcItem );

    clipRegion = CreateRectRgnIndirect(&dis.rcItem);
    if (GetClipRgn(hDC, clipRegion) != 1)
    {
	DeleteObject(clipRegion);
	clipRegion=NULL;
    }
    clipRect = dis.rcItem;
    DPtoLP(hDC, (LPPOINT) &clipRect, 2);
    IntersectClipRect(hDC, clipRect.left,  clipRect.top, clipRect.right, clipRect.bottom);

    if ((hFont = get_button_font( hwnd ))) hPrevFont = SelectObject( hDC, hFont );
    parent = GetParent(hwnd);
    if (!parent) parent = hwnd;
    SendMessageW( parent, WM_CTLCOLORBTN, (WPARAM)hDC, (LPARAM)hwnd );
    SendMessageW( GetParent(hwnd), WM_DRAWITEM, id, (LPARAM)&dis );
    if (hPrevFont) SelectObject(hDC, hPrevFont);
    SelectClipRgn(hDC, clipRegion);
}