Windows编程

开发平台：
Visual C++

PROPBAR.C：源码内容
							    /****************************************************************************/
    /*                                                                          */
    /*                 Copyright (C) 1987-1996 Microsoft Corp.                */
    /*                           All Rights Reserved                            */
    /*                                                                          */
    /****************************************************************************/
    /****************************** Module Header *******************************
    * Module Name: propbar.c
    *
    * Support for the Properties Bar.
    *
    * History:
    *
    ****************************************************************************/
    
    #include "imagedit.h"
    #include "dialogs.h"
	 #include <windowsx.h>
    
    #define IMPOSSIBLEVALUE     0x7FFF
    
    STATICFN VOID NEAR PropBarProcessCommand(HWND hwnd, INT idCtrl,
        INT NotifyCode);
    
    /*
     * Cache variables.  These cache the values of some displayed fields.
     * The field is updated only if the value changes, which avoids flicker.
     * They are initialized to a large value so that the first "set" to
     * any value will always cause the field to be updated.
     */
    static INT xSave = IMPOSSIBLEVALUE;
    static INT ySave = IMPOSSIBLEVALUE;
    static INT cxSave = IMPOSSIBLEVALUE;
    static INT cySave = IMPOSSIBLEVALUE;
    static INT xHotSpotSave = IMPOSSIBLEVALUE;
    static INT yHotSpotSave = IMPOSSIBLEVALUE;
    
    
    
    /************************************************************************
    * PropBarDlgProc
    *
    * This is the dialog procedure for the PropBar ribbon window.
    *
    * History:
    *
    ************************************************************************/
    
    DIALOGPROC PropBarDlgProc(
        HWND hwnd,
        UINT msg,
        WPARAM wParam,
        LPARAM lParam)
    {
        switch (msg) {
            case WM_INITDIALOG:
                /*
                 * Set this global right away.  Other routines that
                 * might be called before CreateDialog returns depend
                 * on this global.
                 */
                ghwndPropBar = hwnd;
    
                PropBarUpdate();
    
                /*
                 * Return TRUE so that the dialog manager does NOT
                 * set the focus for me.  This prevents the PropBar
                 * window from initially having the focus when the
                 * editor is started.
                 */
                return TRUE;
    
            case WM_PAINT:
                {
                    HDC hdc;
                    RECT rc;
                    PAINTSTRUCT ps;
                    HPEN hpenWindowFrame;
    
                    /*
                     * Draw our border lines.
                     */
                    GetClientRect(hwnd, &rc);
                    hdc = BeginPaint(hwnd, &ps);
    
                    SelectObject(hdc, GetStockObject(WHITE_PEN));
                    MoveToEx(hdc, rc.left, rc.top, NULL);
                    LineTo(hdc, rc.right, rc.top);
    
                    SelectObject(hdc, hpenDarkGray);
                    MoveToEx(hdc, rc.left, (rc.top + gcyPropBar) - gcyBorder - 1, NULL);
                    LineTo(hdc, rc.right, (rc.top + gcyPropBar) - gcyBorder - 1);
    
                    hpenWindowFrame = CreatePen(PS_SOLID, gcyBorder,
                            GetSysColor(COLOR_WINDOWFRAME));
                    SelectObject(hdc, hpenWindowFrame);
                    MoveToEx(hdc, rc.left, (rc.top + gcyPropBar) - gcyBorder, NULL);
                    LineTo(hdc, rc.right, (rc.top + gcyPropBar) - gcyBorder);
    
                    EndPaint(hwnd, &ps);
                    DeleteObject(hpenWindowFrame);
                }
    
                break;
    
            case WM_CTLCOLORBTN:
            case WM_CTLCOLORDLG:
            case WM_CTLCOLORLISTBOX:
            case WM_CTLCOLORSTATIC:
                switch (GET_WM_CTLCOLOR_TYPE(wParam, lParam, msg)) {
                    case CTLCOLOR_BTN:
                    case CTLCOLOR_DLG:
                    case CTLCOLOR_LISTBOX:
                        return (BOOL)GetStockObject(LTGRAY_BRUSH);
    
                    case CTLCOLOR_STATIC:
                        SetBkColor(GET_WM_CTLCOLOR_HDC(wParam, lParam, msg),
                                RGB_LIGHTGRAY);
                        return (BOOL)GetStockObject(LTGRAY_BRUSH);
                }
    
                return (BOOL)NULL;
    
            case WM_COMMAND:
                PropBarProcessCommand(hwnd,
                        GET_WM_COMMAND_ID(wParam, lParam),
                        GET_WM_COMMAND_CMD(wParam, lParam));
                break;
    
            case WM_DESTROY:
                /*
                 * Null out the global window handle for the prop bar
                 * for safety's sake.
                 */
                ghwndPropBar = NULL;
    
                break;
    
            default:
                return FALSE;
        }
    
        return FALSE;
    }
    
    
    
    /************************************************************************
    * PropBarProcessCommand
    *
    *
    * Arguments:
    *   HWND hwnd        - The window handle.
    *   INT idCtrl       - The id of the control the WM_COMMAND is for.
    *   INT NotifyCode   - The control's notification code.
    *
    * History:
    *
    ************************************************************************/
    
    STATICFN VOID NEAR PropBarProcessCommand(
        HWND hwnd,
        INT idCtrl,
        INT NotifyCode)
    {
        INT iSelect;
        PIMAGEINFO pImage;
    
        switch (idCtrl) {
            case DID_PROPBARIMAGE:
                if (NotifyCode == CBN_SELCHANGE) {
                    if ((iSelect = (INT)SendDlgItemMessage(hwnd,
                            DID_PROPBARIMAGE, CB_GETCURSEL, 0, 0L)) != CB_ERR) {
                        /*
                         * Get a pointer to the selected image (stored in the
                         * listbox items data field).
                         */
                        pImage = (PIMAGEINFO)SendDlgItemMessage(hwnd,
                                DID_PROPBARIMAGE, CB_GETITEMDATA, iSelect, 0L);
    
                        /*
                         * Open the image.  If it fails, be sure to set the
                         * combobox selection back to the current image.
                         */
                        if (!ImageOpen(pImage)) {
                            PropBarSetImage(gpImageCur);
                            break;
                        }
    
                        SetFocus(ghwndMain);
                    }
                }
    
                break;
    
            case IDOK:
            case IDCANCEL:
                SetFocus(ghwndMain);
                break;
        }
    }
    
    
    
    /************************************************************************
    * PropBarUpdate
    *
    * This function updates the Properties Bar for the selection of a
    * new image or file.  It fills the Image combo with the names of
    * the images in the current file and shows/hides the HotSpot display.
    *
    * History:
    *
    ************************************************************************/
    
    VOID PropBarUpdate(VOID)
    {
        HWND hwndCombo;
        PIMAGEINFO pImage;
        INT idLabel;
        INT i;
    
        if (gpImageCur || gpszFileName) {
            switch (giType) {
                case FT_BITMAP:
                    idLabel = IDS_BITMAPIMAGELABEL;
                    break;
    
                case FT_ICON:
                    idLabel = IDS_ICONIMAGELABEL;
                    break;
    
                case FT_CURSOR:
                    idLabel = IDS_CURSORIMAGELABEL;
                    break;
            }
        }
        else {
            idLabel = IDS_NULL;
        }
    
        SetDlgItemText(ghwndPropBar, DID_PROPBARIMAGELABEL, ids(idLabel));
    
        /*
         * Get the handle to the combo box and clear out all items.
         */
        hwndCombo = GetDlgItem(ghwndPropBar, DID_PROPBARIMAGE);
        SendMessage(hwndCombo, CB_RESETCONTENT, 0, 0);
    
        /*
         * Fill the combo box with the images.
         */
        for (pImage = gpImageHead; pImage; pImage = pImage->pImageNext) {
            i = (INT)SendMessage(hwndCombo, CB_INSERTSTRING, (WPARAM)-1,
                    pImage->pDevice ?
                    (DWORD)(LPSTR)pImage->pDevice->szDesc :
                    (DWORD)(LPSTR)ids(IDS_UNKNOWNIMAGEFORMAT));
    
            SendMessage(hwndCombo, CB_SETITEMDATA, i, (DWORD)(LPSTR)pImage);
        }
    
        /*
         * Select the current image.
         */
        PropBarSetImage(gpImageCur);
    
        /*
         * Show/Hide the HotSpot info depending on whether this is
         * a cursor or not.
         */
        if (giType == FT_CURSOR) {
            if (gpImageCur)
                PropBarSetHotSpot(gpImageCur->iHotspotX, gpImageCur->iHotspotY);
            else
                PropBarClearHotSpot();
    
            PropBarShowHotSpot(TRUE);
        }
        else {
            PropBarShowHotSpot(FALSE);
        }
    }
    
    
    
    /************************************************************************
    * PropBarSetImage
    *
    *
    * History:
    *
    ************************************************************************/
    
    VOID PropBarSetImage(
        PIMAGEINFO pImage)
    {
        if (pImage)
            SendDlgItemMessage(ghwndPropBar, DID_PROPBARIMAGE, CB_SELECTSTRING,
                    (WPARAM)-1, (DWORD)(LPSTR)pImage->pDevice->szDesc);
        else
            SendDlgItemMessage(ghwndPropBar, DID_PROPBARIMAGE, CB_SETCURSEL,
                    (WPARAM)-1, 0);
    }
    
    
    
    /************************************************************************
    * PropBarSetPos
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    VOID PropBarSetPos(
        INT x,
        INT y)
    {
        CHAR szBuf[CCHTEXTMAX];
    
        if (x != xSave || y != ySave) {
            wsprintf(szBuf, "%d, %d", x, y);
            SetDlgItemText(ghwndPropBar, DID_PROPBARPOS, szBuf);
    
            /*
             *  Save them for the next time.
             */
            xSave = x;
            ySave = y;
        }
    }
    
    
    
    /************************************************************************
    * PropBarClearPos
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    VOID PropBarClearPos(VOID)
    {
        SetDlgItemText(ghwndPropBar, DID_PROPBARPOS, "");
    
        /*
         * Reset the cache variables so that the next "set" of
         * the position is sure to update the display fields.
         */
        xSave = IMPOSSIBLEVALUE;
        ySave = IMPOSSIBLEVALUE;
    }
    
    
    
    /************************************************************************
    * PropBarSetSize
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    VOID PropBarSetSize(
        POINT pt1,
        POINT pt2)
    {
        CHAR szBuf[CCHTEXTMAX];
        INT cx;
        INT cy;
    
        NormalizePoints(&pt1, &pt2);
        cx = ((pt2.x - pt1.x) / gZoomFactor) + 1;
        cy = ((pt2.y - pt1.y) / gZoomFactor) + 1;
    
        if (cx != cxSave || cy != cySave) {
            wsprintf(szBuf, "%dx%d", cx, cy);
            SetDlgItemText(ghwndPropBar, DID_PROPBARSIZE, szBuf);
    
            /*
             *  Save them for the next time.
             */
            cxSave = cx;
            cySave = cy;
        }
    }
    
    
    
    /************************************************************************
    * PropBarClearSize
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    VOID PropBarClearSize(VOID)
    {
        SetDlgItemText(ghwndPropBar, DID_PROPBARSIZE, "");
    
        /*
         * Reset the cache variables so that the next "set" of
         * the position is sure to update the display fields.
         */
        cxSave = IMPOSSIBLEVALUE;
        cySave = IMPOSSIBLEVALUE;
    }
    
    
    
    /************************************************************************
    * PropBarSetHotSpot
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    VOID PropBarSetHotSpot(
        INT xHotSpot,
        INT yHotSpot)
    {
        CHAR szBuf[CCHTEXTMAX];
    
        if (xHotSpot != xHotSpotSave || yHotSpot != yHotSpotSave) {
            wsprintf(szBuf, "%d, %d", xHotSpot, yHotSpot);
            SetDlgItemText(ghwndPropBar, DID_PROPBARHOTSPOT, szBuf);
    
            /*
             *  Save them for the next time.
             */
            xHotSpotSave = xHotSpot;
            yHotSpotSave = yHotSpot;
        }
    }
    
    
    
    /************************************************************************
    * PropBarClearHotSpot
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    
    VOID PropBarClearHotSpot(VOID)
    {
        SetDlgItemText(ghwndPropBar, DID_PROPBARHOTSPOT, "");
    
        /*
         * Reset the cache variables so that the next "set" of
         * the hotspot is sure to update the display fields.
         */
        xHotSpotSave = IMPOSSIBLEVALUE;
        yHotSpotSave = IMPOSSIBLEVALUE;
    }
    
    
    
    /************************************************************************
    * PropBarShowHotSpot
    *
    *
    * Arguments:
    *
    * History:
    *
    ************************************************************************/
    VOID PropBarShowHotSpot(
        BOOL fShow)
    {
        ShowWindow(GetDlgItem(ghwndPropBar, DID_PROPBARHOTSPOTLABEL),
                fShow ? SW_SHOWNA : SW_HIDE);
        ShowWindow(GetDlgItem(ghwndPropBar, DID_PROPBARHOTSPOT),
                fShow ? SW_SHOWNA : SW_HIDE);
    }

						