Add wxSize::IsAtLeast() helper

This function is trivial but still useful and it doesn't cost much to
have it.

include/wx/gdicmn.h

@@ -332,6 +332,10 @@ public:
 
     bool IsFullySpecified() const { return x != wxDefaultCoord && y != wxDefaultCoord; }
 
+    // Check that this size object is at least as big as the other one in both
+    // directions.
+    bool IsAtLeast(const wxSize& sz) const { return x >= sz.x && y >= sz.y; }
+
     // combine this size with the other one replacing the default (i.e. equal
     // to wxDefaultCoord) components of this object with those of the other
     void SetDefaults(const wxSize& size)

interface/wx/gdicmn.h

@@ -1037,6 +1037,14 @@ public:
     */
     void IncTo(const wxSize& size);
 
+    /**
+        Returns @true if this size is at least as big as the other one in both
+        directions.
+
+        @since 3.3.0
+     */
+    bool IsAtLeast(const wxSize& size) const;
+
     /**
         Returns @true if neither of the size object components is equal to -1,
         which is used as default for the size values in wxWidgets (hence the

tests/geometry/size.cpp

@@ -51,3 +51,16 @@ TEST_CASE("wxSize::Operators", "[size]")
 
     CHECK( wxSize(6, 9) / 1.5 == wxSize(4, 6) );
 }
+
+TEST_CASE("wxSize::Functions", "[size]")
+{
+    CHECK( wxSize(10, 10).IsAtLeast(wxDefaultSize) );
+    CHECK( wxSize(10, 10).IsAtLeast(wxSize()) );
+    CHECK( wxSize(10, 10).IsAtLeast(wxSize(10, 5)) );
+    CHECK( wxSize(10, 10).IsAtLeast(wxSize(10, 10)) );
+
+    CHECK_FALSE( wxSize(10, 10).IsAtLeast(wxSize(11, 10)) );
+    CHECK_FALSE( wxSize(10, 10).IsAtLeast(wxSize(10, 11)) );
+    CHECK_FALSE( wxSize(10, 10).IsAtLeast(wxSize(11, 11)) );
+    CHECK_FALSE( wxDefaultSize.IsAtLeast(wxSize()) );
+}