Creating a Tab Control
The example in this section demonstrates how to create a tab control and display it in the client area of the application's main window. The application displays a third window (a static control) in the display area of the tab control. The parent window positions and sizes the tab control and static control when it processes the WM_SIZE message.
There are seven tabs, one for each day of the week. When the user selects a tab, the application displays the name of the corresponding day in the static control. The following global variables are used in this example.
// Global variables
HINSTANCE g_hinst; // handle to application instance
char g_achTemp[256]; // temporary buffer for strings
HWND g_hwndMain; // main application window
HWND g_hwndTab; // tab control
HWND g_hwndDisplay; // handle to static control in
// tab control's display area
The following function creates the tab control and adds a tab for each day of the week. The names of the days are defined as string resources, consecutively numbered starting with IDS_FIRSTDAY (defined in the application's header file). Both the parent window and the tab control must have the WS_CLIPSIBLINGS window style. The application's initialization function calls this function after creating the main window.
// DoCreateTabControl - creates a tab control, sized to fit the
// specified parent window's client area, and adds some tabs.
// Returns the handle to the tab control.
// hwndParent - parent window (the application's main window).
HWND WINAPI DoCreateTabControl(HWND hwndParent)
{
RECT rcClient;
HWND hwndTab;
TCITEM tie;
int i;
// Get the dimensions of the parent window's client area, and
// create a tab control child window of that size.
GetClientRect(hwndParent, &rcClient);
InitCommonControls();
hwndTab = CreateWindow(
WC_TABCONTROL, "",
WS_CHILD | WS_CLIPSIBLINGS | WS_VISIBLE,
0, 0, rcClient.right, rcClient.bottom,
hwndParent, NULL, g_hinst, NULL
);
if (hwndTab == NULL)
return NULL;
// Add tabs for each day of the week.
tie.mask = TCIF_TEXT | TCIF_IMAGE;
tie.iImage = -1;
tie.pszText = g_achTemp;
for (i = 0; i < 7; i++) {
LoadString(g_hinst, IDS_FIRSTDAY + i,
g_achTemp, sizeof(g_achTemp));
if (TabCtrl_InsertItem(hwndTab, i, &tie) == -1) {
DestroyWindow(hwndTab);
return NULL;
}
}
return hwndTab;
}
The following function creates the static control that occupies the tab control's display area. The application's initialization function calls this function after creating the main window and the tab control.
// DoCreateDisplayWindow - creates a child window (a static
// control) to occupy the tab control's display area.
// Returns the handle to the static control.
// hwndParent - parent window (the application's main window).
HWND WINAPI DoCreateDisplayWindow(HWND hwndParent)
{
HWND hwndStatic = CreateWindow("STATIC", "",
WS_CHILD | WS_VISIBLE | WS_BORDER,
0, 0, CW_USEDEFAULT, CW_USEDEFAULT,
hwndParent, NULL, g_hinst, NULL);
return hwndStatic;
}
Following are the relevant portions of the application's window procedure. The application processes the WM_SIZE message to position and size the tab control and the static control. To determine the appropriate position and size for the static control, this example sends the tab control a TCM_ADJUSTRECT message (by using the TabCtrl_AdjustRect macro).
When a tab is selected, the tab control sends a WM_NOTIFY message, specifying the TCN_SELCHANGE notification message. The application processes this notification message by setting the text of the static control.
// MainWindowProc - processes the message for the main window class.
// The return value depends on the message.
// hwnd - handle to the window.
// uMsg - identifier for the message.
// wParam - message-specific parameter.
// lParam - message-specific parameter.
LRESULT CALLBACK MainWindowProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
)
{
switch (uMsg) {
case WM_SIZE: {
HDWP hdwp;
RECT rc;
// Calculate the display rectangle, assuming the
// tab control is the size of the client area.
SetRect(&rc, 0, 0,
GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam));
TabCtrl_AdjustRect(g_hwndTab, FALSE, &rc);
// Size the tab control to fit the client area.
hdwp = BeginDeferWindowPos(2);
DeferWindowPos(hdwp, g_hwndTab, NULL, 0, 0,
GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam),
SWP_NOMOVE | SWP_NOZORDER
);
// Position and size the static control to fit the
// tab control's display area, and make sure the
// static control is in front of the tab control.
DeferWindowPos(hdwp,
g_hwndDisplay, HWND_TOP, rc.left, rc.top,
rc.right - rc.left, rc.bottom - rc.top, 0
);
EndDeferWindowPos(hdwp);
}
break;
case WM_NOTIFY:
switch (HIWORD(wParam)) {
case 0:
.
. // menu command processing
.
case TCN_SELCHANGE: {
int iPage = TabCtrl_GetCurSel(g_hwndTab);
LoadString(g_hinst, IDS_FIRSTDAY + iPage,
g_achTemp, sizeof(g_achTemp));
SendMessage(g_hwndDisplay, WM_SETTEXT, 0,
(LPARAM) g_achTemp);
}
break;
}
break;
.
. // additional message processing
.
default:
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
return 0;
}
P.S.
Советую набрать в индексе "Tab Controls" и изучить соответствующий раздел.
)? На codeguru.com есть примерчик, но на MFC.
