Source code of Windows XP (NT5)
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//////////////////////////////////////////////////////////////////////////////
//
// File: tray.cpp
//
// Description:
//
// Copyright (c) 2000 Microsoft Corp.
//
//////////////////////////////////////////////////////////////////////////////
// App Includes
#include "precomp.h"
#include "main.h"
#include "resource.h"
///////////////////////////
// GVAR_LOCAL
//
// Global Variable
//
static struct GVAR_LOCAL
{
HINSTANCE hInstance;
HMENU hMenu;
} GVAR_LOCAL =
{
NULL,
NULL
};
////////////////////////// Function Prototypes ////////////////////////////////
static HRESULT AddTaskBarIcon(HWND hwnd,
UINT uiIconID,
UINT uiCallBackMsg,
ULONG ulStrID);
static HRESULT ModifyTaskBarIcon(HWND hwnd,
UINT uiNewIconID,
ULONG ulStrID);
static HRESULT DeleteTaskBarIcon(HWND hwnd);
//////////////////////////////////////////////////////////////////////
// Tray::Init
//
HRESULT Tray::Init(HINSTANCE hInstance,
HWND hwndDlg,
UINT uiWindowsUserMsgId)
{
HRESULT hr = S_OK;
GVAR_LOCAL.hInstance = hInstance;
// delete the taskbar notification area icon.
DeleteTaskBarIcon(hwndDlg);
// Place the icon in the taskbar notification area.
AddTaskBarIcon(hwndDlg,
IDI_MONITOR,
uiWindowsUserMsgId,
0);
// load our popup menu
GVAR_LOCAL.hMenu = ::LoadMenu(GVAR_LOCAL.hInstance,
MAKEINTRESOURCE(IDM_TRAY_POPUP_MENU));
return hr;
}
//////////////////////////////////////////////////////////////////////
// Tray::Term
//
// Desc:
//
HRESULT Tray::Term(HWND hwndDlg)
{
HRESULT hr = S_OK;
// unload the popup menu
::DestroyMenu(GVAR_LOCAL.hMenu);
GVAR_LOCAL.hMenu = NULL;
// delete the tray icon.
DeleteTaskBarIcon(hwndDlg);
return hr;
}
//////////////////////////////////////////////////////////////////
// Tray::PopupMenu
//
//
HRESULT Tray::PopupMenu(HWND hwndOwner)
{
HRESULT hr = S_OK;
POINT pt = {0}; // stores mouse click
HMENU hmenuTrackPopup = NULL; // pop-up menu
// needed to correct a bug with TrackPopupMenu in Win32
SetForegroundWindow(hwndOwner);
// TrackPopupMenu cannot display the top-level menu, so get
// the handle of the first pop-up menu.
hmenuTrackPopup = GetSubMenu(GVAR_LOCAL.hMenu, 0);
GetCursorPos(&pt);
// Display the floating pop-up menu. Track the left mouse
// button on the assumption that this function is called
// during WM_CONTEXTMENU processing.
TrackPopupMenu(hmenuTrackPopup,
TPM_RIGHTALIGN | TPM_LEFTBUTTON,
pt.x,
pt.y,
0,
hwndOwner,
NULL);
// needed to correct a bug with TrackPopupMenu in Win32
PostMessage(hwndOwner, WM_USER, 0, 0);
return S_OK;
}
//////////////////////////////////////////////////////////////////////
// AddTaskBarIcon
//
// Desc: Adds an icon to the task bar.
//
// Params: - hwnd, handle of main window.
// - uiID, id of icon.
// - uiCallBackMsg, WM_USER message to send to hwnd when
// event occurs on icon.
// - ulStrID, string table text of tool tip to display for
// this icon.
//
static HRESULT AddTaskBarIcon(HWND hwnd,
UINT uiIconID,
UINT uiCallBackMsg,
ULONG ulStrID)
{
HRESULT hr = S_OK;
BOOL bRes;
NOTIFYICONDATA tnid;
HICON hIconHandle = NULL;
TCHAR szToolTip[255 + 1] = {0};
if (ulStrID != 0)
{
::LoadString(GVAR_LOCAL.hInstance,
ulStrID,
szToolTip,
sizeof(szToolTip) / sizeof(TCHAR));
}
if (SUCCEEDED(hr))
{
// load the specified icon.
hIconHandle = (HICON) ::LoadImage(GVAR_LOCAL.hInstance,
MAKEINTRESOURCE(uiIconID),
IMAGE_ICON,
16,
16,
LR_DEFAULTCOLOR);
if (hIconHandle == NULL)
{
hr = E_FAIL;
DBG_ERR(("AddTaskBarIcon, failed ot load icon, hr = 0x%08lx",
hr));
}
}
if (SUCCEEDED(hr))
{
// add the icon to the notification tray
tnid.cbSize = sizeof(NOTIFYICONDATA);
tnid.hWnd = hwnd;
tnid.uID = MSPRJCTR_TASKBAR_ID;
tnid.uFlags = NIF_MESSAGE | NIF_ICON | NIF_TIP;
tnid.uCallbackMessage = uiCallBackMsg;
tnid.hIcon = hIconHandle;
if (szToolTip[0] != '\0')
{
_tcsncpy(tnid.szTip, szToolTip, sizeof(tnid.szTip) / sizeof(TCHAR));
}
else
{
tnid.szTip[0] = '\0';
}
bRes = Shell_NotifyIcon(NIM_ADD, &tnid);
if (!bRes)
{
hr = E_FAIL;
DBG_ERR(("Failed to set TaskBar Icon, hr = 0x%08lx",
hr));
}
}
if (hIconHandle)
{
// destroy the icon
DestroyIcon(hIconHandle);
}
return hr;
}
//////////////////////////////////////////////////////////////////////
// ModifyTaskBarIcon
//
// Desc: Modifies a taskbar icon/tooltip (or both) to a new
// one. Note, if ulStrID is 0, then the tool tip is NOT
// modified. If uiNewIconID is 0, then the icon is not
// modified. If both are 0, then actually nothing changes.
//
//
// Params: - hwnd, handle of main window.
// - uiNewIconID, resource ID of icon to display.
// - ulStrID, string resource ID of string to use for tooltip.
// Note your string will be prefixed with "InterLYNX - "
//
static HRESULT ModifyTaskBarIcon(HWND hwnd,
UINT uiNewIconID,
ULONG ulStrID)
{
HRESULT hr = S_OK;
BOOL bRes = TRUE;
NOTIFYICONDATA tnid = {0};
HICON hIconHandle = NULL;
TCHAR szToolTip[255 + 1] = {0};
BOOL bContinue = TRUE;
if ((uiNewIconID == 0) && (ulStrID == 0))
{
bContinue = FALSE;
}
else
{
bContinue = TRUE;
}
if (bContinue)
{
// if we are instructed to modify the tool tip.
if (ulStrID != 0)
{
::LoadString(GVAR_LOCAL.hInstance,
ulStrID,
szToolTip,
sizeof(szToolTip) / sizeof(TCHAR));
}
// if a new icon was specified.
if (uiNewIconID != 0)
{
// load the specified icon.
hIconHandle = (HICON) ::LoadImage(GVAR_LOCAL.hInstance,
MAKEINTRESOURCE(uiNewIconID),
IMAGE_ICON,
16,
16,
LR_DEFAULTCOLOR);
}
// add the icon to the notification tray
tnid.cbSize = sizeof(NOTIFYICONDATA);
tnid.hWnd = hwnd;
tnid.uID = MSPRJCTR_TASKBAR_ID;
tnid.uFlags = 0;
tnid.hIcon = 0;
if (ulStrID != 0)
{
_tcsncpy(tnid.szTip, szToolTip, sizeof(tnid.szTip) / sizeof(TCHAR));
tnid.uFlags = tnid.uFlags | NIF_TIP;
}
if (uiNewIconID != 0)
{
tnid.hIcon = hIconHandle;
tnid.uFlags = tnid.uFlags | NIF_ICON;
}
bRes = Shell_NotifyIcon(NIM_MODIFY, &tnid);
if (!bRes)
{
hr = E_FAIL;
DBG_ERR(("Failed to modify taskbar icon, hr = 0x%08lx",
hr));
}
}
if (hIconHandle)
{
// destroy the icon
DestroyIcon(hIconHandle);
}
return hr;
}
//////////////////////////////////////////////////////////////////////
// DeleteTaskBarIcon
//
// Desc: Deletes a taskbar icon
//
//
// Params: - hwnd, handle of main window.
// - uiID, id of icon.
//
static HRESULT DeleteTaskBarIcon(HWND hwnd)
{
HRESULT hr = S_OK;
BOOL bRes = TRUE;
NOTIFYICONDATA tnid = {0};
HICON hIconHandle = NULL;
if (SUCCEEDED(hr))
{
tnid.cbSize = sizeof(NOTIFYICONDATA);
tnid.hWnd = hwnd;
tnid.uID = MSPRJCTR_TASKBAR_ID;
bRes = Shell_NotifyIcon(NIM_DELETE, &tnid);
// this is not such a big deal.
if (!bRes)
{
hr = E_FAIL;
}
}
return hr;
}