Fix #140

* Support MinWidth/MinHeight property

Author: sourcechord

FluentWPF/AcrylicWindow.cs

@@ -373,16 +373,23 @@ protected static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lPar
 
                 var win = (Window)HwndSource.FromHwnd(hwnd).RootVisual;
                 GetDpiForMonitor(hMonitor, MONITOR_DPI_TYPE.MDT_EFFECTIVE_DPI, out var dpiX, out var dpiY);
-                var windowMaxWidth = win.MaxWidth / 96.0 * dpiX;
-                var windowMaxHeight = win.MaxHeight / 96.0 * dpiY;
-
-                var maxWidth = (int)Math.Min(Math.Abs(workingRectangle.right - monitorRectangle.left), windowMaxWidth);
-                var maxHeight = (int)Math.Min(Math.Abs(workingRectangle.bottom - monitorRectangle.top), windowMaxHeight);
+                var maxWidth = win.MaxWidth / 96.0 * dpiX;
+                var maxHeight = win.MaxHeight / 96.0 * dpiY;
+                var minWidth = win.MinWidth / 96.0 * dpiX;
+                var minHeight = win.MinHeight / 96.0 * dpiY;
 
+                // ウィンドウ最大化時の位置とサイズを指定
                 info.ptMaxPosition.x = Math.Abs(workingRectangle.left - monitorRectangle.left);
                 info.ptMaxPosition.y = Math.Abs(workingRectangle.top - monitorRectangle.top);
-                info.ptMaxSize.x = maxWidth;
-                info.ptMaxSize.y = maxHeight;
+                info.ptMaxSize.x = (int)Math.Min(Math.Abs(workingRectangle.right - monitorRectangle.left), maxWidth);
+                info.ptMaxSize.y = (int)Math.Min(Math.Abs(workingRectangle.bottom - monitorRectangle.top), maxHeight);
+
+                // ウィンドウのリサイズ可能サイズを設定
+                info.ptMaxTrackSize.x = (int)Math.Min(info.ptMaxTrackSize.x, maxWidth);
+                info.ptMaxTrackSize.y = (int)Math.Min(info.ptMaxTrackSize.y, maxHeight);
+                info.ptMinTrackSize.x = (int)Math.Max(info.ptMinTrackSize.x, minWidth);
+                info.ptMinTrackSize.y = (int)Math.Max(info.ptMinTrackSize.y, minHeight);
+
                 Marshal.StructureToPtr(info, lParam, true);
                 return IntPtr.Zero;
             }
@@ -426,19 +433,8 @@ protected static IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lPar
                     {
                         GetCursorPos(out var cur);
                         pos.y = cur.y - 8;
+                        Marshal.StructureToPtr(pos, lParam, true);
                     }
-
-                    var hMonitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
-                    GetDpiForMonitor(hMonitor, MONITOR_DPI_TYPE.MDT_EFFECTIVE_DPI, out var dpiX, out var dpiY);
-                    var windowMaxWidth = win.MaxWidth / 96.0 * dpiX;
-                    var windowMaxHeight = win.MaxHeight / 96.0 * dpiY;
-
-                    var maxWidth = (int)Math.Min(pos.cx, windowMaxWidth);
-                    var maxHeight = (int)Math.Min(pos.cy, windowMaxHeight);
-                    pos.cx = maxWidth;
-                    pos.cy = maxHeight;
-
-                    Marshal.StructureToPtr(pos, lParam, true);
                 }
             }