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// systray.cpp : Defines the exported functions for the DLL application.
//
// dllmain.cpp : Defines the entry point for the DLL application.
#include "stdafx.h"
#include "systray.h"
// Message posted into message loop when Notification Icon is clicked
#define WM_SYSTRAY_MESSAGE (WM_USER + 1)
static NOTIFYICONDATA nid;
static HWND hWnd;
static HMENU hTrayMenu;
void (*systray_on_exit)(int ignored);
void (*systray_menu_item_selected)(int menu_id);
void reportWindowsError(const char* action) {
LPTSTR pErrMsg = NULL;
DWORD errCode = GetLastError();
DWORD result = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|
FORMAT_MESSAGE_FROM_SYSTEM|
FORMAT_MESSAGE_ARGUMENT_ARRAY,
NULL,
errCode,
LANG_NEUTRAL,
pErrMsg,
0,
NULL);
printf("Systray error %s: %d %ls\n", action, errCode, pErrMsg);
}
void ShowMenu(HWND hWnd) {
POINT p;
if (0 == GetCursorPos(&p)) {
reportWindowsError("get tray menu position");
return;
};
SetForegroundWindow(hWnd); // Win32 bug work-around
TrackPopupMenu(hTrayMenu, TPM_BOTTOMALIGN | TPM_LEFTALIGN, p.x, p.y, 0, hWnd, NULL);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
switch (message) {
case WM_COMMAND:
{
int menuId = LOWORD(wParam);
if (menuId != -1) {
systray_menu_item_selected(menuId);
}
}
break;
case WM_DESTROY:
printf("Window destroyed\n");
systray_on_exit(0/*ignored*/);
Shell_NotifyIcon(NIM_DELETE, &nid);
PostQuitMessage(0);
break;
case WM_ENDSESSION:
printf("Session ending\n");
// When the system shuts down (or logs off), we don't receive WM_DESTROY,
// so we capture WM_ENDSESSION instead and call on_exit here too.
systray_on_exit(0/*ignored*/);
Shell_NotifyIcon(NIM_DELETE, &nid);
break;
case WM_SYSTRAY_MESSAGE:
switch(lParam) {
case WM_RBUTTONUP:
ShowMenu(hWnd);
break;
case WM_LBUTTONUP:
ShowMenu(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
};
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
void MyRegisterClass(HINSTANCE hInstance, TCHAR* szWindowClass) {
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = 0;
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
RegisterClassEx(&wcex);
}
HWND InitInstance(HINSTANCE hInstance, int nCmdShow, TCHAR* szWindowClass) {
HWND hWnd = CreateWindow(szWindowClass, TEXT(""), WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);
if (!hWnd) {
return 0;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return hWnd;
}
BOOL createMenu() {
hTrayMenu = CreatePopupMenu();
if (!hTrayMenu) {
printf("Couldn't create hTrayMenu\n");
return FALSE;
}
MENUINFO menuInfo;
menuInfo.cbSize = sizeof(MENUINFO);
menuInfo.fMask = MIM_APPLYTOSUBMENUS;
return SetMenuInfo(hTrayMenu, &menuInfo);
}
BOOL addNotifyIcon() {
nid.cbSize = sizeof(NOTIFYICONDATA);
nid.hWnd = hWnd;
nid.uID = 100;
nid.uCallbackMessage = WM_SYSTRAY_MESSAGE;
nid.uFlags = NIF_MESSAGE;
return Shell_NotifyIcon(NIM_ADD, &nid);
}
int nativeLoop(void (*systray_ready)(int ignored),
void (*_systray_on_exit)(int ignored),
void (*_systray_menu_item_selected)(int menu_id)) {
systray_on_exit = _systray_on_exit;
systray_menu_item_selected = _systray_menu_item_selected;
HINSTANCE hInstance = GetModuleHandle(NULL);
TCHAR* szWindowClass = TEXT("SystrayClass");
MyRegisterClass(hInstance, szWindowClass);
hWnd = InitInstance(hInstance, FALSE, szWindowClass); // Don't show window
if (!hWnd) {
reportWindowsError("create window");
return EXIT_FAILURE;
}
if (!createMenu()) {
reportWindowsError("create menu");
return EXIT_FAILURE;
}
if (!addNotifyIcon()) {
reportWindowsError("add notify icon");
return EXIT_FAILURE;
}
systray_ready(0);
MSG msg;
while (GetMessage(&msg, NULL, 0, 0)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return EXIT_SUCCESS;
}
void setIcon(const wchar_t* iconFile) {
HICON hIcon = (HICON) LoadImage(NULL, iconFile, IMAGE_ICON, 64, 64, LR_LOADFROMFILE);
if (hIcon == NULL) {
reportWindowsError("load icon image");
} else {
nid.hIcon = hIcon;
nid.uFlags = NIF_ICON;
Shell_NotifyIcon(NIM_MODIFY, &nid);
}
}
void setTooltip(const wchar_t* tooltip) {
wcsncpy_s(nid.szTip, tooltip, sizeof(nid.szTip)/sizeof(wchar_t));
nid.uFlags = NIF_TIP;
Shell_NotifyIcon(NIM_MODIFY, &nid);
}
void add_or_update_menu_item(int menuId, wchar_t* title, wchar_t* tooltip, short disabled, short checked) {
MENUITEMINFO menuItemInfo;
menuItemInfo.cbSize = sizeof(MENUITEMINFO);
menuItemInfo.fMask = MIIM_FTYPE | MIIM_STRING | MIIM_ID | MIIM_STATE;
menuItemInfo.fType = MFT_STRING;
menuItemInfo.dwTypeData = title;
menuItemInfo.cch = wcslen(title) + 1;
menuItemInfo.wID = menuId;
menuItemInfo.fState = 0;
if (disabled == 1) {
menuItemInfo.fState |= MFS_DISABLED;
}
if (checked == 1) {
menuItemInfo.fState |= MFS_CHECKED;
}
// We set the menu item info based on the menuID
BOOL setOK = SetMenuItemInfo(hTrayMenu, menuId, FALSE, &menuItemInfo);
if (!setOK) {
// We insert the menu item using the menuID as a position. This is important
// because hidden items will end up here when shown again, so this ensures
// that their position stays consistent.
InsertMenuItem(hTrayMenu, menuId, TRUE, &menuItemInfo);
}
}
void add_separator(int menuId) {
InsertMenu(hTrayMenu, // parent menu
menuId, // position
MF_BYPOSITION | MF_SEPARATOR,
menuId, // identifier
NULL);
}
void hide_menu_item(int menuId) {
DeleteMenu(hTrayMenu, menuId, MF_BYCOMMAND);
}
void quit() {
PostMessage(hWnd, WM_CLOSE, 0, 0);
}
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