Creating a Square Meal Dialog Box - Win32 Programmer's Reference

Win32 Programmer's Reference

Home Index About

Custom Search

Creating a Square Meal Dialog Box

Following are the dialog box procedure and supporting functions for the Square Meal dialog box.

HWND hwndMain;

HWND hwndEdit;

char achTemp[256]; /* temporary buffer */

HBITMAP hbmBread;

HBITMAP hbmDairy;

HBITMAP hbmFruit;

HBITMAP hbmMeat;

HBITMAP hbmBreadMask;

HBITMAP hbmDairyMask;

HBITMAP hbmFruitMask;

HBITMAP hbmMeatMask;

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

FUNCTION: FoodDlgProc

PURPOSE: Dialog procedure for Food dialog box.

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

BOOL CALLBACK FoodDlgProc(hwndDlg, msg, wParam, lParam)

HWND hwndDlg;

UINT msg;

WPARAM wParam;

LPARAM lParam;

{

LPMEASUREITEMSTRUCT lpmis;

LPDRAWITEMSTRUCT lpdis;

HBITMAP hbmIcon;

HBITMAP hbmMask;

COLORREF clrBackground;

COLORREF clrForeground;

TEXTMETRIC tm;

HDC hdc;

HWND hwnd;

int x;

int y;

switch (msg) {

case WM_INITDIALOG:

* Call an application-defined function to load

* bitmap resources.

if (!LoadIconBitmaps()) {

EndDialog(hwndDlg, -1);

break;

}

/* Initialize the drop-down list box. */

if (!InitGroupList(hwndDlg)) {

DeleteIconBitmaps();

EndDialog(hwndDlg, -1);

break;

}

/* Select the first food group. */

SendDlgItemMessage(hwndDlg, IDCOMBO, CB_SETCURSEL,

0, 0);

/* List the foods and select the first food. */

InitFoodList(hwndDlg);

SendDlgItemMessage(hwndDlg, IDLIST, LB_SETCURSEL,

0, 0);

break;

case WM_MEASUREITEM:

lpmis = (LPMEASUREITEMSTRUCT) lParam;

if (lpmis->itemHeight < CY_BITMAP + 2)

lpmis->itemHeight = CY_BITMAP + 2;

break;

case WM_DRAWITEM:

lpdis = (LPDRAWITEMSTRUCT) lParam;

if (lpdis->itemID == -1) /* empty item */

break;

/* Determine the bitmaps used to draw the icon. */

switch (lpdis->itemData) {

case ID_BREAD:

hbmIcon = hbmBread;

hbmMask = hbmBreadMask;

break;

case ID_DAIRY:

hbmIcon = hbmDairy;

hbmMask = hbmDairyMask;

break;

case ID_FRUIT:

hbmIcon = hbmFruit;

hbmMask = hbmFruitMask;

break;

default: /* meat */

hbmIcon = hbmMeat;

hbmMask = hbmMeatMask;

break;

}

* The colors depend on whether the item is

* selected.

clrForeground = SetTextColor(lpdis->hDC,

GetSysColor(lpdis->itemState & ODS_SELECTED ?

COLOR_HIGHLIGHTTEXT : COLOR_WINDOWTEXT));

clrBackground = SetBkColor(lpdis->hDC,

GetSysColor(lpdis->itemState & ODS_SELECTED ?

COLOR_HIGHLIGHT : COLOR_WINDOW));

/* Calculate the vertical and horizontal position. */

GetTextMetrics(lpdis->hDC, &tm);

y = (lpdis->rcItem.bottom + lpdis->rcItem.top -

tm.tmHeight) / 2;

x = LOWORD(GetDialogBaseUnits()) / 4;

/* Get and display the text for the list item. */

SendMessage(lpdis->hwndItem, CB_GETLBTEXT,

lpdis->itemID, (LPARAM) (LPCSTR) achTemp);

ExtTextOut(lpdis->hDC, CX_BITMAP + 2 * x, y,

ETO_CLIPPED | ETO_OPAQUE, &lpdis->rcItem,

achTemp, lstrlen(achTemp), NULL);

/* Restore the previous colors. */

SetTextColor(lpdis->hDC, clrForeground);

SetBkColor(lpdis->hDC, clrBackground);

/* Show the icon. */

hdc = CreateCompatibleDC(lpdis->hDC);

if (hdc == NULL)

break;

SelectObject(hdc, hbmMask);

BitBlt(lpdis->hDC, x, lpdis->rcItem.top + 1,

CX_BITMAP, CY_BITMAP, hdc, 0, 0, SRCAND);

SelectObject(hdc, hbmIcon);

BitBlt(lpdis->hDC, x, lpdis->rcItem.top + 1,

CX_BITMAP, CY_BITMAP, hdc, 0, 0, SRCPAINT);

DeleteDC(hdc);

/* If the item has the focus, draw focus rectangle. */

if (lpdis->itemState & ODS_FOCUS)

DrawFocusRect(lpdis->hDC, &lpdis->rcItem);

break;

case WM_COMMAND:

switch (LOWORD(wParam)) {

case IDCOMBO:

if (HIWORD(wParam) == CBN_SELENDOK) {

InitFoodList(hwndDlg);

SendDlgItemMessage(hwndDlg, IDLIST,

LB_SETCURSEL, 0, 0);

}

break;

case IDLIST:

if (HIWORD(wParam) != LBN_DBLCLK)

break;

/* For a double-click, process the OK case. */

case IDOK:

/* Get the text for the selected list item. */

hwnd = GetDlgItem(hwndDlg, IDLIST);

SendMessage(hwnd, LB_GETTEXT,

SendMessage(hwnd, LB_GETCURSEL, 0, 0),

(LPARAM) achTemp);

/* Insert the text into the edit window. */

SendMessage(hwndEdit, EM_REPLACESEL, 0,

(LPARAM) achTemp);

EndDialog(hwndDlg, 0);

break;

case IDCANCEL:

hwnd = GetDlgItem(hwndDlg, IDCOMBO);

if (SendMessage(hwnd, CB_GETDROPPEDSTATE,

0, 0))

SendMessage(hwnd, CB_SHOWDROPDOWN,

FALSE, 0);

else

EndDialog(hwndDlg, 0);

}

break;

case WM_DESTROY:

* Call the application-defined function to free

* bitmap resources.

DeleteIconBitmaps();

break;

default:

return FALSE;

}

return TRUE;

}

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

FUNCTION: InitGroupList

PURPOSE: Initializes the "food groups" drop-down

list box.

COMMENTS: The ID of the food group associated with

each list item is saved as item data.

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

BOOL PASCAL InitGroupList(HWND hwndDlg)

{

HWND hwndCombo = GetDlgItem(hwndDlg, IDCOMBO);

DWORD dwIndex;

/* Add an item for each food group. */

LoadString(hinst, ID_BREAD, achTemp, sizeof(achTemp));

dwIndex = SendMessage(hwndCombo, CB_ADDSTRING, 0,

(LPARAM) (LPCSTR) achTemp);

SendMessage(hwndCombo, CB_SETITEMDATA, dwIndex, ID_BREAD);

LoadString(hinst, ID_DAIRY, achTemp, sizeof(achTemp));

dwIndex = SendMessage(hwndCombo, CB_ADDSTRING, 0,

(LPARAM) (LPCSTR) achTemp);

SendMessage(hwndCombo, CB_SETITEMDATA, dwIndex, ID_DAIRY);

LoadString(hinst, ID_FRUIT, achTemp, sizeof(achTemp));

dwIndex = SendMessage(hwndCombo, CB_ADDSTRING, 0,

(LPARAM) (LPCSTR) achTemp);

SendMessage(hwndCombo, CB_SETITEMDATA, dwIndex, ID_FRUIT);

LoadString(hinst, ID_MEAT, achTemp, sizeof(achTemp));

dwIndex = SendMessage(hwndCombo, CB_ADDSTRING, 0,

(LPARAM) (LPCSTR) achTemp);

SendMessage(hwndCombo, CB_SETITEMDATA, dwIndex, ID_MEAT);

return TRUE;

}

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

FUNCTION: InitFoodList

PURPOSE: Clears the contents of the food list, and

adds the names of foods for the current

food group.

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

oid PASCAL InitFoodList(HWND hwndDlg)

{

HWND hwndCombo = GetDlgItem(hwndDlg, IDCOMBO);

HWND hwndList = GetDlgItem(hwndDlg, IDLIST);

UINT idFoodGroup;

LPSTR lpsz;

LPSTR lpszEnd;

/* Determine the current food group. */

idFoodGroup = SendMessage(

hwndCombo,

CB_GETITEMDATA,

SendMessage(hwndCombo, CB_GETCURSEL, 0, 0),

);

/* Clear the list contents. */

SendMessage(hwndList, LB_RESETCONTENT, 0, 0);

. /* Add food names for the current food group. */

}

Last news from Greatis Software

    Nostalgia .Net     .Net is powerful, but not all-powerful, so sometimes we need to use Win32 API for our .Net applications. It's simple enough with Platform Invoke if you have Win32 skill, but we do not always have time to dig the ancient documentation, declare the special types that are compatible with Win32, find the values of the Win32's constants and so on. Nostalgia .Net offers several simple-to-use classes, and components that will allow you to forget about the headache of Win32 and just use the power of Win32 in your application the same way as you use the native. Net classes. More »

Recommended software for developers

    Ultimate Pack     Component pack for Delphi and C++ Builder that contains runtime form designer, runtime object inspector, print suite and much more for the very special price. More »

    Form Designer .Net     Unique runtime form design solution that allows to edit any form in .Net WinForms application at runtime with full source codes for only 300 euro! More »

    Print Suite .Net     Print Suite .Net is a set of components for easy printing texts, images and grids from your WinForms applications. Full C# source codes are available More »

    Gradient Controls .Net     Gradient Controls .Net offers controls with gradient background feature. Labels, panels and so on... Full C# source codes are available More »

    Greatis iGrid     iGrid plots drawing grid right over your desktop, so you can use it everywhere, with any drawing application without any special plugins for different graphic editors. More »

All the contacts and projects

Dmitry Vasiliev (just.dmitry)

More Online Helps

Win32 Programmer's Reference
Win32 Multimedia Programmer's Reference
OLE Programmer's Reference
Microsoft Windows Pen API Programmer's Reference
Microsoft Windows Sockets 2 Reference
Microsoft Windows Telephony API (TAPI) Programmer's Reference
Unix Manual Pages

greatis just4fun network