hide pesky panels

In multi-monitor setup, hide unwanted panels (image processing and navigation) to avoid obscuring image, when mouse leaves the window.
sdneon · Nov 9, 2023 · cbcbecd · cbcbecd
1 parent 4041b14
commit cbcbecd
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Showing 2 changed files with 25 additions and 1 deletion.
diff --git a/src/JPEGView/MainDlg.cpp b/src/JPEGView/MainDlg.cpp
@@ -178,7 +178,8 @@ CMainDlg::CMainDlg(bool bForceFullScreen):
 	m_bSlideShowForward(true),
 	m_hToastFont(0),
 	m_strToast(""),
-	m_nImageRetryCnt(0)
+	m_nImageRetryCnt(0),
+	m_bMouseTracking(false)
 {
 	CSettingsProvider& sp = CSettingsProvider::This();
 
@@ -1195,6 +1196,17 @@ LRESULT CMainDlg::OnXButtonDown(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/,
 }
 
 LRESULT CMainDlg::OnMouseMove(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& /*bHandled*/) {
+	if (!m_bMouseTracking)
+	{
+		//must re-register once every time to get WM_MOUSELEAVE event
+		TRACKMOUSEEVENT tme;
+		tme.cbSize = sizeof(tme);
+		tme.hwndTrack = m_hWnd;
+		tme.dwFlags = TME_LEAVE; //Add '| TME_HOVER' if need WM_MOUSEHOVER event
+		tme.dwHoverTime = 1;
+		_TrackMouseEvent(&tme);
+		m_bMouseTracking = true;
+	}
 	// Turn mouse pointer on when mouse has moved some distance
 	int nOldMouseY = m_nMouseY;
 	int nOldMouseX = m_nMouseX;
@@ -1248,6 +1260,15 @@ LRESULT CMainDlg::OnMouseWheel(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/,
 	return 0;
 }
 
+LRESULT CMainDlg::OnMouseLeave(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM lParam, BOOL& /*bHandled*/)
+{
+	m_bMouseTracking = false; //reset to let next mouse move event reactivate this handler
+	//hide unwanted panels so as not to obscure image, when mouse exits window
+	m_pImageProcPanelCtl->SetVisible(false);
+	m_pNavPanelCtl->HideNavPanelTemporary(); //somehow only this works; SetVisible(false), Invalidate, etc., all failed to hide nav panel
+	return 0;
+}
+
 LRESULT CMainDlg::OnKeyDown(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/, BOOL& /*bHandled*/) {
 	bool bCtrl = (::GetKeyState(VK_CONTROL) & 0x8000) != 0;
 	bool bShift = (::GetKeyState(VK_SHIFT) & 0x8000) != 0;

diff --git a/src/JPEGView/MainDlg.h b/src/JPEGView/MainDlg.h
@@ -79,6 +79,7 @@ class CMainDlg : public CDialogImpl<CMainDlg>
 		MESSAGE_HANDLER(WM_XBUTTONDOWN, OnXButtonDown)
 		MESSAGE_HANDLER(WM_XBUTTONDBLCLK, OnXButtonDown)
 		MESSAGE_HANDLER(WM_MOUSEMOVE, OnMouseMove)
+		MESSAGE_HANDLER(WM_MOUSELEAVE, OnMouseLeave)
 		MESSAGE_HANDLER(WM_MOUSEWHEEL, OnMouseWheel)
 		MESSAGE_HANDLER(WM_KEYDOWN, OnKeyDown)
 		MESSAGE_HANDLER(WM_SYSKEYDOWN, OnSysKeyDown)
@@ -121,6 +122,7 @@ class CMainDlg : public CDialogImpl<CMainDlg>
 	LRESULT OnMButtonUp(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);
 	LRESULT OnXButtonDown(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);
 	LRESULT OnMouseMove(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/, BOOL& /*bHandled*/);
+	LRESULT OnMouseLeave(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/, BOOL& /*bHandled*/);
 	LRESULT OnMouseWheel(UINT /*uMsg*/, WPARAM wParam, LPARAM /*lParam*/, BOOL& /*bHandled*/);
 	LRESULT OnKeyDown(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);
 	LRESULT OnSysKeyDown(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL& /*bHandled*/);
@@ -343,6 +345,7 @@ class CMainDlg : public CDialogImpl<CMainDlg>
 	HFONT m_hToastFont;
 	CString m_strToast;
 	int m_nImageRetryCnt;
+	bool m_bMouseTracking;
 
 	void SetToast(LPCTSTR a_strToast, DWORD a_nDurationMs = 3000);
 	void SetToastIfEmpty(LPCTSTR a_strToast, DWORD a_nDurationMs = 3000);