[FancyZones]Maximize windows within zone support

Added support for resizing maximized windows to keep them within zone boundaries.

Holding down Shift, "bypasses" this behaviour by resizing the window to fit across all zones in the window's current workarea.

The reason for this implementation is, if the maximized window is completely unmanaged by FancyZones, any subsequent "EVENT_OBJECT_LOCATIONCHANGE" events emitted by the window would cause FancyZones to seemingly spuriously resize the window to whichever zone is under the users's cursor.  This was learned the hard way.  : )

src/modules/fancyzones/FancyZones/FancyZonesApp.cpp

@@ -84,13 +84,14 @@ void FancyZonesApp::InitHooks()
         }
     }
 
-    std::array<DWORD, 6> events_to_subscribe = {
+    std::array<DWORD, 7> events_to_subscribe = {
         EVENT_SYSTEM_MOVESIZESTART,
         EVENT_SYSTEM_MOVESIZEEND,
         EVENT_OBJECT_NAMECHANGE,
         EVENT_OBJECT_UNCLOAKED,
         EVENT_OBJECT_SHOW,
-        EVENT_OBJECT_CREATE
+        EVENT_OBJECT_CREATE,
+		EVENT_OBJECT_LOCATIONCHANGE
     };
     for (const auto event : events_to_subscribe)
     {

src/modules/fancyzones/FancyZonesLib/FancyZones.cpp

@@ -729,6 +729,35 @@ LRESULT FancyZones::WndProc(HWND window, UINT message, WPARAM wparam, LPARAM lpa
                     MoveSizeUpdate(monitor, ptScreen);
                 }
             }
+            else
+            {
+                // Handle "Maximize in Zone" events
+				auto hwnd = reinterpret_cast<HWND>(wparam);
+
+				if (FancyZonesWindowUtils::IsCandidateForZoning(hwnd) && FancyZonesWindowUtils::IsWindowMaximized(hwnd))
+                {
+                    auto monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONULL);
+                    auto workArea = m_workAreaHandler.GetWorkArea(hwnd, VirtualDesktop::instance().GetCurrentVirtualDesktopId());
+                    const auto zoneSet = workArea->ZoneSet();
+
+                    if (zoneSet)
+                    {
+                        // If Shift key is pressed...
+                        if (GetAsyncKeyState(VK_SHIFT) & 0x8000)
+                        {
+                            // ... resize window to all zones in work area
+                            auto zones = zoneSet->GetAllZones();
+                            MoveWindowIntoZone(hwnd, workArea, zones);
+                        }
+                        else
+                        {
+                            // ... otherwise, resize window to zone the mouse cursor is in
+                            auto zones = zoneSet->ZonesFromPoint(ptScreen);
+                            MoveWindowIntoZone(hwnd, workArea, zones);
+                        }
+                    }
+                }
+            }
         }
         else if (message == WM_PRIV_WINDOWCREATED)
         {

src/modules/fancyzones/FancyZonesLib/ZoneSet.cpp

@@ -34,6 +34,7 @@ struct ZoneSet : winrt::implements<ZoneSet, IZoneSet>
     Id() const noexcept { return m_config.Id; }
     IFACEMETHODIMP_(FancyZonesDataTypes::ZoneSetLayoutType)
     LayoutType() const noexcept { return m_config.LayoutType; }
+    IFACEMETHODIMP_(ZoneIndexSet) GetAllZones() const noexcept;
     IFACEMETHODIMP_(ZoneIndexSet) ZonesFromPoint(POINT pt) const noexcept;
     IFACEMETHODIMP_(ZoneIndexSet) GetZoneIndexSetFromWindow(HWND window) const noexcept;
     IFACEMETHODIMP_(ZonesMap) GetZones()const noexcept override { return m_zones; }
@@ -80,6 +81,19 @@ struct ZoneSet : winrt::implements<ZoneSet, IZoneSet>
     ZoneSetConfig m_config;
 };
 
+IFACEMETHODIMP_(ZoneIndexSet)
+ZoneSet::GetAllZones() const noexcept
+{
+    ZoneIndexSet capturedZones;
+    for (const auto& [zoneId, zone] : m_zones)
+    {
+		capturedZones.emplace_back(zoneId);
+    }
+
+    return capturedZones;
+}
+
+
 IFACEMETHODIMP_(ZoneIndexSet)
 ZoneSet::ZonesFromPoint(POINT pt) const noexcept
 {

src/modules/fancyzones/FancyZonesLib/ZoneSet.h

@@ -21,6 +21,12 @@ interface __declspec(uuid("{E4839EB7-669D-49CF-84A9-71A2DFD851A3}")) IZoneSet :
      * @returns Type of the zone layout. Layout type can be focus, columns, rows, grid, priority grid or custom.
      */
     IFACEMETHOD_(FancyZonesDataTypes::ZoneSetLayoutType, LayoutType)() const = 0;
+    /**
+     * Get all zones contained within the ZoneSet.
+     *
+     * @returns Vector of indices, corresponding to the current set of zones contained within the ZoneSet's workarea.
+     */
+    IFACEMETHOD_(ZoneIndexSet, GetAllZones)() const = 0;
     /**
      * Get zones from cursor coordinates.
      *