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add new msg dispatch method for filtering events

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This commit is contained in:
Jinhao 2018-10-23 03:31:34 +08:00
parent 943a9e444d
commit 1247e5c4e4
2 changed files with 31 additions and 7 deletions
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34
source/detail/posix/msg_dispatcher.hpp
View File

@ -143,7 +143,7 @@ namespace detail
{
//Make a cleanup msg packet to infor the dispatcher the window is closed.
msg_packet_tag msg;
msg.kind = msg.kind_cleanup;
msg.kind = msg_packet_tag::pkt_family::cleanup;
msg.u.packet_window = wd;
thr->msg_queue.push_back(msg);
}
@ -171,6 +171,30 @@ namespace detail
}
}
}
template<typename MsgFilter>
void dispatch(MsgFilter msg_filter_fn)
{
auto tid = nana::system::this_thread_id();
msg_packet_tag msg;
int qstate;
//Test whether the thread is registered for window, and retrieve the queue state for event
while((qstate = _m_read_queue(tid, msg, 0)))
{
//the queue is empty
if(-1 == qstate)
{
if(false == _m_wait_for_queue(tid))
proc_.timer_proc(tid);
}
else
{
if(msg_filter_fn(msg))
return;
}
}
}
private:
void _m_msg_driver()
{
@ -220,7 +244,7 @@ namespace detail
switch(proc_.filter_proc(event, msg_pack))
{
case 0:
msg_pack.kind = msg_pack.kind_xevent;
msg_pack.kind = msg_packet_tag::pkt_family::xevent;
msg_pack.u.xevent = event;
_m_msg_dispatch(msg_pack);
break;
@ -246,9 +270,9 @@ namespace detail
{
switch(pack.kind)
{
case msg_packet_tag::kind_xevent:
case msg_packet_tag::pkt_family::xevent:
return _m_event_window(pack.u.xevent);
case msg_packet_tag::kind_mouse_drop:
case msg_packet_tag::pkt_family::mouse_drop:
return pack.u.mouse_drop.window;
default:
break;
@ -294,7 +318,7 @@ namespace detail
//Check whether the event dispatcher is used for the modal window
//and when the modal window is closing, the event dispatcher would
//stop event pumping.
if((modal == msg.u.packet_window) && (msg.kind == msg.kind_cleanup))
if((modal == msg.u.packet_window) && (msg.kind == msg_packet_tag::pkt_family::cleanup))
return 0;
return 1;

4
source/detail/posix/msg_packet.hpp
View File

@ -10,8 +10,8 @@ namespace detail
{
struct msg_packet_tag
{
enum kind_t{kind_xevent, kind_mouse_drop, kind_cleanup};
kind_t kind;
enum class pkt_family{xevent, mouse_drop, cleanup};
pkt_family kind;
union
{
XEvent xevent;