要点:
将wxwidgets Hello World tutorial中的代码调整为"模块"在CppMicroServices框架中,使用事件表或Bind()注册的事件似乎不会触发,但使用Connect()注册的事件会触发。
即。当我点击菜单项时,我不会弹出。如果我使用Connect(...)
注册事件处理程序,则弹出窗口可以正常工作。
为什么会发生这种情况,我该如何解决?
环境:
代码:
Github repository - 完整来源。它不容易构建(如果它有助于诊断,请询问我的编译步骤。)
// The following are excerpts, I haven't included the namespace declarations / #includes
// === BlankDisplayService.cpp === //
// I know the constructor is "heavy", but this is just a spike
// For this issue, this is the entry point
BlankDisplayService::BlankDisplayService() {
wxApp::SetInstance( new BlankApplication() );
openWindow(0, nullptr);
}
BlankDisplayService::~BlankDisplayService() {
wxTheApp->OnExit();
wxEntryCleanup();
}
int BlankDisplayService::openWindow(int argc, char** argv) {
wxEntryStart(argc, argv);
wxTheApp->OnInit();
wxTheApp->OnRun();
return 0;
}
// === BlankApplication.cpp === //
bool BlankApplication::OnInit() {
BlankWindow *window = new BlankWindow( "Hello World", wxPoint(50, 50), wxSize(450, 340));
window->Show(true);
return true;
}
// === BlankWindow.h === //
class BlankWindow : public wxFrame {
private:
wxStaticText *st1;
wxStaticText *st2;
public:
enum Command {
ID_Hello = 1
};
BlankWindow(const wxString& title, const wxPoint& pos, const wxSize& size);
virtual ~BlankWindow();
private:
void OnMove(wxMoveEvent & event);
void OnHello(wxCommandEvent& event);
void OnExit(wxCommandEvent& event);
void OnAbout(wxCommandEvent& event);
wxDECLARE_EVENT_TABLE();
};
// === BlankWindow.cpp === //
wxBEGIN_EVENT_TABLE(sl::desktop::demo::wx::BlankWindow, wxFrame)
EVT_MENU(ID_Hello, BlankWindow::OnHello)
EVT_MENU(wxID_EXIT, BlankWindow::OnExit)
EVT_MENU(wxID_ABOUT, BlankWindow::OnAbout)
wxEND_EVENT_TABLE()
BlankWindow::BlankWindow(const wxString& title, const wxPoint& pos, const wxSize& size) : wxFrame(NULL, wxID_ANY, title, pos, size) {
wxMenu *menuFile = new wxMenu;
menuFile->Append(ID_Hello, "&Hello...\tCtrl-H", "Help string shown in status bar for this menu item");
menuFile->AppendSeparator();
menuFile->Append(wxID_EXIT);
wxMenu *menuHelp = new wxMenu;
menuHelp->Append(wxID_ABOUT);
wxMenuBar *menuBar = new wxMenuBar;
menuBar->Append( menuFile, "&File" );
menuBar->Append( menuHelp, "&Help" );
SetMenuBar( menuBar );
CreateStatusBar();
SetStatusText( "Welcome to wxWidgets!" );
wxPanel* panel = new wxPanel(this, -1);
panel->SetSize(200, 100);
st1 = new wxStaticText(panel, -1, wxT(""), wxPoint(10, 10));
st2 = new wxStaticText(panel, -1, wxT(""), wxPoint(10, 30));
Connect(wxEVT_MOVE, wxMoveEventHandler(BlankWindow::OnMove));
Centre();
//Connect(wxEVT_MENU, wxCommandEventHandler(BlankWindow::OnHello));
}
BlankWindow::~BlankWindow() {
}
void BlankWindow::OnMove(wxMoveEvent& event) {
wxPoint size = event.GetPosition();
st1->SetLabel(wxString::Format(wxT("x: %d"), size.x ));
st2->SetLabel(wxString::Format(wxT("y: %d"), size.y ));
}
void BlankWindow::OnHello(wxCommandEvent& WXUNUSED(event)) {
wxLogMessage("Hello world from wxWidgets!");
}
void BlankWindow::OnExit(wxCommandEvent& WXUNUSED(event)) {
Close(true);
}
void BlankWindow::OnAbout(wxCommandEvent& event) {
wxMessageBox("This is a wxWidgets' Hello world sample", "About Hello World", wxOK | wxICON_INFORMATION );
}
备注:
我使用biicode管理我的依赖项,因此导入可能不是您以前常常看到的。
我确信所有这些都在主线程中运行。
更新
将BlankDisplayService的构造函数中的openWindow(...)
调用转移到测试类中,导致使用事件表声明的事件正确触发。但是我还没能确定原因 - 无论是从测试中调用还是在构造函数中调用threadIds都完全相同:
什么时候不起作用:
[MAIN] Thread Id: 140460630185856
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from SlDesktopDemoWxBundle
[ RUN ] SlDesktopDemoWxBundle.DisplaysWindow
[TEST] Thread Id: 140460630185856
[CSTR] Thread Id: 140460630185856
[OPEN] Thread Id: 140460630185856
^C
什么时候有效:
[CSTR] Thread Id: 139695227554368
[MAIN] Thread Id: 139695227554368
[==========] Running 1 test from 1 test case.
[----------] Global test environment set-up.
[----------] 1 test from SlDesktopDemoWxBundle
[ RUN ] SlDesktopDemoWxBundle.DisplaysWindow
[TEST] Thread Id: 139695227554368
[OPEN] Thread Id: 139695227554368
[ OK ] SlDesktopDemoWxBundle.DisplaysWindow (3165 ms)
[----------] 1 test from SlDesktopDemoWxBundle (3165 ms total)
[----------] Global test environment tear-down
[==========] 1 test from 1 test case ran. (3166 ms total)
[ PASSED ] 1 test.
答案 0 :(得分:0)
问题可能出在您的初始化代码中。很难看到你到底想要在这里实现什么,因为你最终调用OnRun()
,无论如何进入正常的事件循环,为什么你不使用正常模式? / p>
我也不知道您的代码在何处/如何退出事件循环。如果它太快,它可以解释为什么你没有得到这些事件。