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comparison foosdk/sdk/foobar2000/SDK/message_loop.h @ 1:20d02a178406 default tip

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*: check in everything else yay
author Paper <paper@tflc.us>
date Mon, 05 Jan 2026 02:15:46 -0500
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0:e9bb126753e7 1:20d02a178406
1 #pragma once
2
3 #ifdef _WIN32
4 //! A message filter class. Allows you to filter incoming messages in main app loop. Use message_loop API to register/unregister, \n
5 //! or derive from message_filter_impl_base to have your class registered/deregistered automatically with lifetime.
6 //! //! Use with caution. Will not be executed during modal loops.
7 class NOVTABLE message_filter {
8 public:
9 //! Notifies you about incoming message. \n
10 //! You can alter the message (not generally recommended), let others handle it (return false) \n
11 //! or signal that you've handled it (return true) to suppress further processing.
12 virtual bool pretranslate_message(MSG * p_msg) = 0;
13 };
14
15 //! An idle handler class. Executed when main loop is about to enter idle state. \n
16 //! Use with caution. Will not be executed during modal loops.
17 class NOVTABLE idle_handler {
18 public:
19 virtual bool on_idle() = 0;
20 };
21
22 //! Entrypoint API for registering message_filter and idle_handler objects. \n
23 //! Usage: message_loop::get()->add_message_filter(myfilter);
24 class NOVTABLE message_loop : public service_base
25 {
26 public:
27 virtual void add_message_filter(message_filter * ptr) = 0;
28 virtual void remove_message_filter(message_filter * ptr) = 0;
29
30 virtual void add_idle_handler(idle_handler * ptr) = 0;
31 virtual void remove_idle_handler(idle_handler * ptr) = 0;
32
33 FB2K_MAKE_SERVICE_COREAPI(message_loop);
34 };
35
36 class NOVTABLE message_loop_v2 : public message_loop {
37 public:
38 virtual void add_message_filter_ex(message_filter * ptr, t_uint32 lowest, t_uint32 highest) = 0;
39
40 FB2K_MAKE_SERVICE_COREAPI_EXTENSION(message_loop_v2, message_loop);
41 };
42
43 class message_filter_impl_base : public message_filter {
44 public:
45 message_filter_impl_base();
46 message_filter_impl_base(t_uint32 lowest, t_uint32 highest);
47 ~message_filter_impl_base();
48
49 bool pretranslate_message(MSG * ) override {return false;}
50
51 PFC_CLASS_NOT_COPYABLE(message_filter_impl_base,message_filter_impl_base);
52 };
53
54 class message_filter_impl_accel : public message_filter_impl_base {
55 protected:
56 bool pretranslate_message(MSG * p_msg) override;
57 public:
58 message_filter_impl_accel(HINSTANCE p_instance,const TCHAR * p_accel);
59 void set_wnd(HWND p_wnd) {m_wnd = p_wnd;}
60 private:
61 HWND m_wnd = NULL;
62 win32_accelerator m_accel;
63
64 PFC_CLASS_NOT_COPYABLE(message_filter_impl_accel,message_filter_impl_accel);
65 };
66
67 class message_filter_remap_f1 : public message_filter_impl_base {
68 public:
69 bool pretranslate_message(MSG * p_msg) override;
70 void set_wnd(HWND wnd) {m_wnd = wnd;}
71 private:
72 static bool IsOurMsg(const MSG * msg) {
73 return msg->message == WM_KEYDOWN && msg->wParam == VK_F1;
74 }
75 HWND m_wnd = NULL;
76 };
77
78 class idle_handler_impl_base : public idle_handler {
79 public:
80 idle_handler_impl_base() {message_loop::get()->add_idle_handler(this);}
81 ~idle_handler_impl_base() { message_loop::get()->remove_idle_handler(this);}
82 bool on_idle() {return true;}
83
84 PFC_CLASS_NOT_COPYABLE_EX(idle_handler_impl_base)
85 };
86 #endif // _WIN32