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