feat: Add support for dialog visibility events (#83)

Author: funap

src/Explorer/Explorer.cpp

@@ -240,6 +240,13 @@ extern "C" __declspec(dllexport) void setInfo(NppData notpadPlusData)
     optionDlg   .init(g_hInst, g_nppData._nppHandle);
     helpDlg     .init(g_hInst, g_nppData._nppHandle);
 
+    explorerDlg.VisibleChanged([](bool visible) {
+        ::SendMessage(g_nppData._nppHandle, NPPM_SETMENUITEMCHECK, funcItem[0]._cmdID, (LPARAM)visible);
+    });
+    favesDlg.VisibleChanged([](bool visible) {
+        ::SendMessage(g_nppData._nppHandle, NPPM_SETMENUITEMCHECK, funcItem[1]._cmdID, (LPARAM)visible);
+    });
+
     /* Subclassing for Notepad */
     wndProcNotepad = (WNDPROC)::SetWindowLongPtr(g_nppData._nppHandle, GWLP_WNDPROC, (LONG_PTR)SubWndProcNotepad);
 }

src/NppPlugin/DockingFeature/DockingDlgInterface.h

@@ -23,6 +23,7 @@
 #include <assert.h>
 #include <shlwapi.h>
 #include <string>
+#include <functional>
 
 #include "StaticDialog.h"
 #include "../Notepad_plus_msgs.h"
@@ -70,6 +71,9 @@ class DockingDlgInterface : public StaticDialog
 
 	virtual void display(bool toShow = true) const {
 		::SendMessage(_hParent, toShow ? NPPM_DMMSHOW : NPPM_DMMHIDE, 0, reinterpret_cast<LPARAM>(_hSelf));
+        if (_visibleChangedHandler) {
+            _visibleChangedHandler(toShow);
+        }
 	}
 
 	bool isClosed() const {
@@ -84,13 +88,17 @@ class DockingDlgInterface : public StaticDialog
 		return _moduleName.c_str();
 	}
 
+    void VisibleChanged(std::function<void(bool)> visibleChangedHandler) {
+        _visibleChangedHandler = visibleChangedHandler;
+    }
 protected :
 	int	_dlgID = -1;
 	bool _isFloating = true;
 	int _iDockedPos = 0;
 	std::wstring _moduleName;
 	std::wstring _pluginName;
 	bool _isClosed = false;
+    std::function<void(bool)> _visibleChangedHandler;
 
 	virtual INT_PTR CALLBACK run_dlgProc(UINT message, WPARAM, LPARAM lParam) {
 		switch (message)
@@ -105,6 +113,9 @@ protected :
 					{
 						case DMN_CLOSE:
 						{
+                            if (_visibleChangedHandler) {
+                                _visibleChangedHandler(false);
+                            }
 							break;
 						}
 						case DMN_FLOAT: