[英]Simulating right click on system tray icon and clicking on context menu in C++
[英]Creating system tray right click menu C++
我正在嘗試在虛幻引擎 4 中創建 Systemtray 圖標。我不是 C++ 專家。 到目前為止,這是我從互聯網上剝取的代碼
#define NOTIFICATION_TRAY_ICON_MSG (WM_USER + 0x100)
AddTrayIcon(hwnd, 1, NOTIFICATION_TRAY_ICON_MSG, 0);
void AddTrayIcon(HWND hWnd, UINT uID, UINT uCallbackMsg, UINT uIcon) {
//CREATE SYSTEN TRAY ICON.---------------------------------------------------------------------
NOTIFYICONDATA nid;
nid.hWnd = hWnd;
nid.uID = uID;
nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
nid.uCallbackMessage = uCallbackMsg;
FString ThePath = FPaths::ConvertRelativePathToFull(FPaths::RootDir()) ;
FString GameName = FApp::GetName();
ThePath.Append(GameName);
ThePath.Append(".exe");
GEngine->AddOnScreenDebugMessage(-1, 12.f, FColor::White, ThePath);
WORD id = 0;
nid.hIcon = ExtractAssociatedIcon(nullptr, ThePath.GetCharArray().GetData(),&id);
//LPCWSTR iconfile = "C:/Temp/icon.ico";
//ExtractIconEx(iconfile, 0, NULL, &(nid.hIcon), 1);
//strcpy(nid.szTip, "Tool Tip");
//SEND MESSAGE TO SYSTEM TRAY TO ADD ICON.--------------------------------------------
Shell_NotifyIcon(NIM_ADD, &nid);
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case NOTIFICATION_TRAY_ICON_MSG:
{
// This is a message that originated with the
// Notification Tray Icon. The lParam tells use exactly which event
// it is.
switch (lParam)
{
case WM_LBUTTONDBLCLK:
{
const int IDM_EXIT = 100;
POINT pt;
GetCursorPos(&pt);
HMENU hmenu = CreatePopupMenu();
InsertMenu(hmenu, 0, MF_BYPOSITION | MF_STRING, IDM_EXIT, L"Exit");
TrackPopupMenu(hmenu, TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_BOTTOMALIGN, pt.x, pt.y, 0, GetActiveWindow(), NULL);
break;
}
}
}
}
return 0;
}
圖標已創建,但我無法右鍵單擊並從中獲取彈出菜單我也無法弄清楚 LRESULT CALLBACK WndProc() 函數是如何被觸發的。
任何人都可以幫助謝謝
您沒有正確初始化NOTIFYICONDATA
。 具體來說,您沒有設置其cbSize
或uVersion
成員,這會直接影響Shell_NotifyIcon()
通過您分配給uCallbackMessage
成員的消息與您的應用程序交互的方式。 以下 MSDN 文檔對此進行了詳細討論:
此外,您說您想在右鍵單擊時顯示彈出菜單,但您的WndProc()
正在尋找左鍵雙擊。
但更重要的是,您需要將您的WndProc()
與您提供給Shell_NotifyIcon()
的HWND
相關聯,以便您可以真正接收您的NOTIFICATION_TRAY_ICON_MSG
消息。 由於您嘗試使用的HWND
不是您的創建者,UE4 是創建者,因此您必須對window進行子類化,例如:
#define NOTIFICATION_TRAY_ICON_MSG (WM_USER + 0x100)
void AddTrayIcon(HWND hWnd, UINT uID, UINT uCallbackMsg, UINT uIcon);
void RemoveTrayIcon(HWND hWnd, UINT uID);
LRESULT CALLBACK SubclassProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData);
...
HWND hwnd = ...; // GetActiveWindow(), etc
if (SetWindowSubclass(hwnd, &SubclassProc, 1, 0))
AddTrayIcon(hwnd, 1, NOTIFICATION_TRAY_ICON_MSG, 0);
...
void AddTrayIcon(HWND hWnd, UINT uID, UINT uCallbackMsg, UINT uIcon) {
//CREATE SYSTEM TRAY ICON.---------------------------------------------------------------------
NOTIFYICONDATA nid = {};
nid.cbSize = sizeof(nid);
nid.hWnd = hWnd;
nid.uID = uID;
nid.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
nid.uCallbackMessage = uCallbackMsg;
nid.uVersion = NOTIFYICON_VERSION_4;
FString ThePath = FPaths::ConvertRelativePathToFull(FPaths::RootDir()) ;
FString GameName = FApp::GetName();
ThePath.Append(GameName);
ThePath.Append(".exe");
GEngine->AddOnScreenDebugMessage(-1, 12.f, FColor::White, ThePath);
WORD id = 0;
nid.hIcon = ExtractAssociatedIcon(nullptr, ThePath.GetCharArray().GetData(), &id);
//LPCWSTR iconfile = L"C:/Temp/icon.ico";
//ExtractIconEx(iconfile, 0, NULL, &(nid.hIcon), 1);
//strcpy(nid.szTip, "Tool Tip");
//SEND MESSAGE TO SYSTEM TRAY TO ADD ICON.--------------------------------------------
if (Shell_NotifyIcon(NIM_ADD, &nid))
Shell_NotifyIcon(NIM_SETVERSION, &nid);
}
void RemoveTrayIcon(HWND hWnd, UINT uID) {
//REMOVE SYSTEM TRAY ICON.---------------------------------------------------------------------
NOTIFYICONDATA nid = {};
nid.cbSize = sizeof(nid);
nid.hWnd = hWnd;
nid.uID = uID;
//SEND MESSAGE TO SYSTEM TRAY TO REMOVE ICON.--------------------------------------------
Shell_NotifyIcon(NIM_DELETE, &nid);
}
LRESULT CALLBACK SubclassProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
{
switch (uMsg)
{
case WM_NCDESTROY:
RemoveTrayIcon(hWnd, 1);
RemoveWindowSubclass(hWnd, &SubclassProc, uIdSubclass);
break;
case NOTIFICATION_TRAY_ICON_MSG:
{
// This is a message that originated with the
// Notification Tray Icon. The lParam tells use exactly which event
// it is.
switch (LOWORD(lParam))
{
case NIN_SELECT:
case NIN_KEYSELECT:
case WM_CONTEXTMENU:
{
const int IDM_EXIT = 100;
POINT pt;
GetCursorPos(&pt);
HMENU hmenu = CreatePopupMenu();
InsertMenu(hmenu, 0, MF_BYPOSITION | MF_STRING, IDM_EXIT, L"Exit");
SetForegroundWindow(hWnd);
int cmd = TrackPopupMenu(hmenu, TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_BOTTOMALIGN | TPM_NONOTIFY | TPM_RETURNCMD, pt.x, pt.y, 0, hWnd, NULL);
PostMessage(hWnd, WM_NULL, 0, 0);
if (cmd == IDM_EXIT)
{
...
}
break;
}
}
return 0;
}
}
return DefSubclassProc(hWnd, uMsg, wParam, lParam);
}
話雖如此,您確實應該創建自己的窗口來處理與系統托盤的交互。 您可以直接調用CreateWindowEx()
來創建一個隱藏的僅消息窗口,然后將您的圖標的WndProc()
與該窗口相關聯。 您不需要使用 UE4 窗口:
LRESULT CALLBACK SysTrayWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
...
LPCTSTR SysTrayWndClass = TEXT("MySysTrayWnd");
HINSTANCE hInst = ...; // GetModuleHandle(NULL), etc
WNDCLASS wc = {};
wc.lpfnWndProc = &SysTrayWndProc;
wc.hInstance = hInst;
wc.lpszClassName = SysTrayWndClass;
RegisterClass(&wc);
HWND hSysTrayIconWnd = CreateWindowEx(0, SysTrayWndClass, NULL, 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, hInst, NULL);
if (hSysTrayIconWnd) {
AddTrayIcon(hSysTrayIconWnd, 1, NOTIFICATION_TRAY_ICON_MSG, 0);
}
...
if (hSysTrayIconWnd) {
RemoveTrayIcon(hSysTrayIconWnd, 1);
DestroyWindow(hSysTrayIconWnd);
}
...
LRESULT CALLBACK SysTrayWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case NOTIFICATION_TRAY_ICON_MSG:
{
// This is a message that originated with the
// Notification Tray Icon. The lParam tells use exactly which event
// it is.
switch (LOWORD(lParam))
{
case NIN_SELECT:
case NIN_KEYSELECT:
case WM_CONTEXTMENU:
{
const int IDM_EXIT = 100;
POINT pt;
GetCursorPos(&pt);
HMENU hmenu = CreatePopupMenu();
InsertMenu(hmenu, 0, MF_BYPOSITION | MF_STRING, IDM_EXIT, L"Exit");
SetForegroundWindow(hWnd);
int cmd = TrackPopupMenu(hmenu, TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_BOTTOMALIGN, pt.x, pt.y, 0, hWnd, NULL);
PostMessage(hWnd, WM_NULL, 0, 0);
break;
}
}
return 0;
}
case WM_COMMAND:
if (lParam == 0 && LOWORD(wParam) == IDM_EXIT)
{
...
}
break;
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.