combobox.c

一个嵌入式操作系统(microwindows)的源代码

/*--------------------------------------------------------------------------
**      ComboBox.c             Twin           From:  Twin/controls
**
**              
**------------------------- < License Information > ------------------------
**
**      This file was originally a part of Willows TWIN.  Willows
**  TWIN was released under a Library GPL (LGPL).  This permits
**  redistribution of this source code, provided that the full
**  TWIN license is in effect, and provided that all modifications
**  to this source code are made publicly available.
**  Please refer to Willows software (www.willows.com) or
**  LICENSE for full information.
**  
**      Under Twine, this file is also protected by an LGPL.  Please
**  see LICENSE for full details on this license.
**  
**
**      Copyright 1997 Willows Software, Inc. 
**------------------------ < File Content Description > --------------------
**
**  Module:	 controls/ComboBox.c
**
**  Description:
**      
**
**  Functions defined:
**    
**------------------------- < Revision Information > -----------------------
**
**      Full Revision history at bottom of file
**      
**--------------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "windows.h"
#include "windowsx.h"

#define WinMalloc(n)	malloc((n))
#define WinFree(p)	free(p)

#define GET_WM_COMMAND_ID(wp, lp)               LOWORD(wp)
#define GET_WM_COMMAND_HWND(wp, lp)             (HWND)(lp)
#define GET_WM_COMMAND_CMD(wp, lp)              HIWORD(wp)
#define GET_WM_COMMAND_MPS(id, hwnd, cmd)    \
        (WPARAM)MAKELONG(id, cmd), (LONG)(hwnd)
#define LOSHORT(x)	(short int)LOWORD(x)
#define Edit_SetSel(hwndCtl, ichStart, ichEnd)  ((void)SendMessage((hwndCtl), EM_SETSEL, (ichStart), (ichEnd)))


typedef struct  {
    HFONT   hFont;          /* hFont used */
    HWND    hWndParent;     /* parent window */
    UINT    nID;            /* control ID */
    WORD    wStateFlags;    /* combobox state flags */
    UINT    wStyle;         /* this is a copy of LOWORD(style) */
    BOOL    bExtended;      /* extended UI flag */
    BOOL    bRedraw;        /* MiD - redraw flag, draw only if it's 1 */
    HWND    EditControl;    /* edit/static control hWnd */
    HWND    ListBoxControl; /* listbox control hWnd */
    RECT    ButtonRect;     /* local button rect (client) */
    RECT    ListBoxRect;    /* listbox rect (screen) */
    UINT    uHeight;        /* height of the normal state */
    WNDPROC lpfnOldStatic;  /* previous static wndproc */
    UINT    nListItems;     /* ecw */
} COMBOBOX;

#define CWD_LPCBDATA  0
#define CBC_EDITID    1

#define CSF_CAPTUREACTIVE   0x0001
#define CSF_LOCALBUTTONDOWN 0x0002
#define CSF_BUTTONDOWN      0x0004
#define CSF_LBOXBUTTONDOWN  0x0008
#define CSF_FOCUS           0x0010 /* MiD */
#define CSF_HASDROPPED	    0x0020 /* weav */

#define SET_STATE(lp, wMask)   (lp->wStateFlags |= (wMask))
#define CLEAR_STATE(lp, wMask) (lp->wStateFlags &= ~(wMask))
#define IS_SET(lp, wMask)      (lp->wStateFlags & (wMask))

#define BOWNERDRAW(l) ((l)->wStyle & (CBS_OWNERDRAWFIXED|CBS_OWNERDRAWVARIABLE))

/**********************************************
    Styles:

    CBS_AUTOHSCROLL     passed to the edit control
    CBS_DISABLENOSCROLL passed to the listbox control
    CBS_DROPDOWN
    CBS_DROPDOWNLIST
    CBS_HASSTRINGS      passed to the listbox control
    CBS_NOINTEGRALHEIGHT    passed to the listbox control
    CBS_OEMCONVERT      passed to the edit control
    CBS_OWNERDRAWFIXED  passed to the listbox control
    CBS_OWNERDRAWVARIABLE   passed to the listbox control
    CBS_SIMPLE      TODO
    CBS_SORT        passed to the listbox control

    WS_VSCROLL      passed to the listbox control

*********************************************/

/**********************************************
    CBN_xxx messages to be added

    from mouse tracking...
    CBN_SELENDCANCEL    TODO
    CBN_SELENDOK        TODO

*********************************************/

/* imported stuff */
#if 1
void
Draw3DButtonRect(HDC hDC, HPEN hPenHigh, HPEN hPenShadow,
		RECT rc, BOOL fClicked)
{
    HPEN     hPenOld;
    POINT    lpt[6];

    POINT    p3[3];
    int	     shrink=1;

    hPenOld = SelectObject(hDC, hPenShadow);
    if (fClicked) {
	lpt[0].x = lpt[1].x = rc.left;
	lpt[1].y = lpt[2].y = rc.top;
	lpt[2].x = rc.right-1;
	lpt[0].y = rc.bottom-1;
        Polyline(hDC,lpt,3);
    }
    else {
	lpt[0].x = lpt[1].x = rc.right-1;
	lpt[0].y = rc.top;
	lpt[1].y = lpt[2].y = rc.bottom-1;
	lpt[2].x = rc.left;
	lpt[3].x = rc.left+1;	
	lpt[3].y = lpt[4].y = rc.bottom-2;	
	lpt[4].x = lpt[5].x = rc.right-2;
	lpt[5].y = rc.top+1;
	Polyline(hDC,lpt,6);

	SelectObject(hDC, hPenHigh);
	lpt[0].x = rc.right-1;
	lpt[0].y = lpt[1].y = rc.top;
	lpt[1].x = lpt[2].x = rc.left;
	lpt[2].y = rc.bottom-1;
	lpt[3].x = lpt[4].x = rc.left+1;
	lpt[3].y = rc.bottom-2;
	lpt[4].y = lpt[5].y = rc.top+1;
	lpt[5].x = rc.right-2;
	Polyline(hDC,lpt,6);
    }

    SelectObject(hDC,GetStockObject(BLACK_BRUSH));
    /* down */
    p3[0].x= rc.left + ((rc.right-rc.left)/2) - 1;
    p3[0].y= rc.bottom - 4 - shrink;
    p3[1].x= rc.left + 2 + shrink - 1;
    p3[1].y= rc.bottom-(rc.bottom-rc.top) + 2 + shrink;
    p3[2].x= rc.left + ((rc.right-rc.left)-4) - shrink;
    p3[2].y= rc.bottom-(rc.bottom-rc.top) + 2 + shrink;
    Polygon(hDC,p3,3);

    SelectObject(hDC,hPenOld);
}
#endif

#if 0	/* jmt: fix: no COMBOLBOX */
extern LRESULT  DefLISTBOXProc(HWND, UINT, WPARAM, LPARAM);
extern LRESULT  ListboxCtrlProc(HWND, UINT, WPARAM, LPARAM);
#endif

#if 0
static HPEN     GetSysColorPen(int color)
{
	return NULL;
}
static HBRUSH   GetSysColorBrush(int color)
{
	return NULL;
}
#endif

typedef HWND HWND32;

#if 0	/* jmt: fix: no ownerdraw */
typedef HANDLE HCLASS32;
static HCLASS32 FindClass(LPCSTR str, HINSTANCE hInstance)
{
	return NULL;
}
#endif

#if 0	/* jmt: fix: no scrollbar */
static HWND TWIN_ConvertToSysScroll(HWND hwnd, BOOL status, LPPOINT pp)
{
	return NULL;
}
#endif
extern HWND listwp;
static HWND WindowFromPoint(POINT pt)
{
	HWND wp,wp1;
	int dx,dy,dx1,dy1;
#if 0
	return NULL;	/* fix!! */
#else
	wp1=NULL;
	switch(sizeof(dx))
	{
	case 4:
		dx=0x7fffffff;
		dy=0x7fffffff;
		break;
	case 2:
		dx=0x7fff;
		dy=0x7fff;
		break;
	}
	for(wp=listwp; wp; wp=wp->next) 
	{
		if (wp->winrect.left <= pt.x && pt.x <= wp->winrect.right)
		{
			dx1=(wp->winrect.right-pt.x);
			if (dx1<dx)
			{
				wp1=wp;
				dx=dx1;	
			}
			dx1=(pt.x-wp->winrect.left);
			if (dx1<dx)
			{
				wp1=wp;
				dx=dx1;	
			}
		}
		if (wp->winrect.top <= pt.y && pt.y <= wp->winrect.bottom)
		{
			dy1=(wp->winrect.bottom-pt.y);
			if (dy1<dy)
			{
				wp1=wp;
				dy=dy1;	
			}
			dy1=(pt.y-wp->winrect.top);
			if (dy1<dy)
			{
				wp1=wp;
				dy=dy1;	
			}
		}
	}
#endif
	return wp1;
}

/* internal stuff */
static void CBoxDrawButton(HWND,UINT,COMBOBOX *);
static void CBoxSendMouseToLBox(COMBOBOX *, UINT, WPARAM, POINT);
static void CBoxCapture(HWND, WORD);
static void CBoxDrawEdit(COMBOBOX *, HWND, UINT);
static void CBoxDrawStatic(COMBOBOX *, HWND, UINT); /* MiD */

/* handle specific CB messages */
static LRESULT DefCBProc(HWND , UINT , WPARAM , LPARAM );

#if 0	/* jmt: fix: no ownerdraw */
static WNDPROC lpComboBinToNat = 0;
#endif

static LRESULT CALLBACK 
DefComboboxProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

int WINAPI MwRegisterComboboxControl(HINSTANCE hInstance)
{
	WNDCLASS	wc;

	wc.style	= CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_GLOBALCLASS;
	wc.lpfnWndProc	= (WNDPROC)DefComboboxProc;
	wc.cbClsExtra	= 0;
	wc.cbWndExtra	= 0;
	wc.hInstance	= hInstance;
	wc.hIcon	= NULL;
	wc.hCursor	= 0; 
	wc.hbrBackground= GetStockObject(WHITE_BRUSH);
	wc.lpszMenuName	= NULL;
	wc.lpszClassName= "COMBOBOX";

	return RegisterClass(&wc);
}

static LRESULT CALLBACK 
DefComboboxProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    PAINTSTRUCT ps;
    HDC      hDC;
    TEXTMETRIC tm;
#if 0	/* jmt: fix: no ownerdraw */
    MEASUREITEMSTRUCT mis;
#endif
    COMBOBOX *lp = (COMBOBOX *)NULL;
    LRESULT   rc;
    HINSTANCE hInst;
    POINT     cp,cpScreen,pp;
    UINT      uiKey;
    LPCREATESTRUCT lpcs;
#if 1	/* jmt: fix: no WM_WINDOWPOSCHANGING */
    LPWINDOWPOS lpwp;
#endif
#if 0	/* jmt: fix: no ownerdraw */
    HCLASS32 hComboClass32;
    LPMEASUREITEMSTRUCT lpmis;
    LPDRAWITEMSTRUCT lpdis;
    LPDELETEITEMSTRUCT lpdlis;
#endif
    DWORD dwStyle,dwExStyle;
    WORD wEditWidth = 0,wEditHeight;
    WORD wCBN;
#if 0	/* jmt: fix: no WM_SETFONT/WM_GETFONT */
    RECT rcClient;
#endif

    rc = CB_OKAY;
    if ((uMsg != WM_CREATE/*WM_NCCREATE*/) && /*(uMsg != WM_CONVERT) &&*/
       !(lp = (COMBOBOX *)hWnd->userdata/*GetWindowLong(hWnd,CWD_LPCBDATA)*/))
    	return rc;

    switch(uMsg) {
#if 0
    case WM_SIZE:
    case WM_ENABLE:
    case WM_LBUTTONDBLCLK:
    case WM_COMPAREITEM:
    case WM_CUT:
    case WM_CLEAR:
#endif               

    case WM_SETFOCUS:
        SET_STATE(lp, CSF_FOCUS);
        if ((lp->wStyle & 0x0F) == CBS_DROPDOWNLIST)
           {
           uiKey = (UINT)SendMessage(lp->ListBoxControl, LB_GETCURSEL, 0, 0L);
           CBoxDrawStatic(lp, hWnd, uiKey);
           }
	if (lp->EditControl)
        {
	   SetFocus(lp->EditControl);
        }
        break;
        
    case WM_KILLFOCUS:
        CLEAR_STATE(lp, CSF_FOCUS);
        if ((lp->wStyle & 0x0F) == CBS_DROPDOWNLIST)
        {
           uiKey = (UINT)SendMessage(lp->ListBoxControl, LB_GETCURSEL, 0, 0L);
           CBoxDrawStatic(lp, hWnd, uiKey);
        }
        /*
        **    Hide listbox when loosing focus to window other than 
        **    our own listbox... When wParam == 0 we "loose" the focus
        **    to the scrollbar in a listbox!
        */
        if ((lp->wStyle & 0x0F) != CBS_SIMPLE && wParam != (WPARAM)lp->ListBoxControl && wParam != 0)
           SendMessage(hWnd, CB_SHOWDROPDOWN, 0, 0L);
        fprintf(stderr," 385: WM_KILLFOCUS\n");
        break;

#if 0	/* jmt: fix: no WM_KEYDOWN */
    case WM_KEYDOWN:     /* MiD 08/14/95 */
        /*
        **   We have to process this message in order to show
        **   current selection in a static control for certain
        **   keys. This doesn't affect combobox with an edit
        **   control, since the edit traps all key messages.
        */
        {
        int nCur   = SendMessage(lp->ListBoxControl, LB_GETCURSEL,0, 0L);
	int nPrevCur = nCur;
        int nCount = SendMessage(lp->ListBoxControl, LB_GETCOUNT, 0, 0L);

        if (nCount == 0)
           break;

        switch(wParam)
            {
            case VK_HOME:
               nCur = 0;
               break;

            case VK_END:
               nCur = nCount - 1;
               break;

            case VK_UP:
               nCur--;
               break;

            case VK_DOWN:
               nCur++;
               break;

            default:
              return 0L;
            }

        if (nCur >= nCount)
           nCur = nCount - 1;  
        if (nCur < 0)
           nCur = 0;

        SendMessage(lp->ListBoxControl, LB_SETCURSEL, nCur, 0L);
        SendMessage(lp->hWndParent, WM_COMMAND, GET_WM_COMMAND_MPS(lp->nID, hWnd, CBN_SELCHANGE));
	if (nCur != nPrevCur)
/* ecw */  SendMessage(lp->hWndParent, WM_COMMAND, GET_WM_COMMAND_MPS(lp->nID, hWnd, CBN_SELENDOK));
        InvalidateRect(hWnd, NULL, 1);
        break;
        }
#endif	/* WM_KEYDOWN */

    case WM_CHAR:
        {
        int nNewCur;
        int nOldCur;

        if (lp->EditControl)
           {
           SendMessage(lp->EditControl, uMsg, wParam, lParam);
           }
        else {
             nOldCur = SendMessage(lp->ListBoxControl, LB_GETCURSEL,0, 0L);
             SendMessage(lp->ListBoxControl, uMsg, wParam, lParam);
             nNewCur = SendMessage(lp->ListBoxControl, LB_GETCURSEL, 0, 0L);
             if (nNewCur != nOldCur)
                {
                SendMessage(lp->hWndParent, WM_COMMAND, GET_WM_COMMAND_MPS(lp->nID, hWnd, CBN_SELCHANGE));
                InvalidateRect(hWnd, NULL, 1);
                }
             }
        break;
        }

#if 0	/* jmt: fix: no WM_SETREDRAW */
    case WM_SETREDRAW: 
        lp->bRedraw = wParam;
        if (lp->EditControl)