66 lines
1.3 KiB
C++
66 lines
1.3 KiB
C++
// The base class of a cross flatform message pump implemention
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#ifndef BASE_FRAMEWORK_WIN_MESSAGE_PUMP_H_
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#define BASE_FRAMEWORK_WIN_MESSAGE_PUMP_H_
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#include "base/framework/message_pump.h"
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#if defined(OS_WIN)
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#include <windows.h>
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#include "base/time/time.h"
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namespace nbase
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{
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class BASE_EXPORT WinMessagePump: public MessagePump
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{
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public:
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// UI消息派发器
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// UI消息泵如果使用消息派发器，那么将不再使用经典的
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// TranslateMessage/DispatchMessage模式而改由Dispatcher来完成
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class BASE_EXPORT Dispatcher
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{
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public:
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virtual ~Dispatcher() {}
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virtual bool Dispatch(const MSG &message) = 0;
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};
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WinMessagePump() : have_work_(0), state_(NULL) {}
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virtual ~WinMessagePump() {}
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void RunWithDispatcher(Delegate* delegate, Dispatcher* dispatcher);
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virtual void Run(Delegate* delegate) { return RunWithDispatcher(delegate, NULL); }
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virtual void Quit();
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protected:
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struct RunState
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{
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int run_depth; // 嵌套调用深度
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bool should_quit; // 是否应该立即退出
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Delegate* delegate; // 处理任务的委托
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Dispatcher* dispatcher; // 消息派发器
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};
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// 取当前定时间隔
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int64_t GetCurrentDelay() const;
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virtual void DoRunLoop() = 0;
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// 定时任务下次运行的时间
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TimeTicks delayed_work_time_;
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// 指示消息队列中是否有kMsgDoWork消息
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long have_work_;
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// 指示当前MessagePump的状态
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RunState* state_;
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};
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}
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#endif // OS_WIN
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#endif // BASE_FRAMEWORK_WIN_MESSAGE_PUMP_H_
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