UI: Avoid enum/float comparisons.

Common/UI/View.cpp

@@ -19,9 +19,9 @@
 
 namespace UI {
 
-const float ITEM_HEIGHT = 64.f;
-const float MIN_TEXT_SCALE = 0.8f;
-const float MAX_ITEM_SIZE = 65535.0f;
+static constexpr Size ITEM_HEIGHT = 64.f;
+static constexpr float MIN_TEXT_SCALE = 0.8f;
+static constexpr float MAX_ITEM_SIZE = 65535.0f;
 
 void MeasureBySpec(Size sz, float contentWidth, MeasureSpec spec, float *measured) {
 	*measured = sz;

Common/UI/View.h

@@ -128,10 +128,10 @@ enum FocusDirection {
 	FOCUS_NEXT_PAGE,
 };
 
-enum {
-	WRAP_CONTENT = -1,
-	FILL_PARENT = -2,
-};
+typedef float Size;  // can also be WRAP_CONTENT or FILL_PARENT.
+
+static constexpr Size WRAP_CONTENT = -1.0f;
+static constexpr Size FILL_PARENT = -2.0f;
 
 // Gravity
 enum Gravity {
@@ -174,8 +174,6 @@ enum class BorderStyle {
 	ITEM_DOWN_BG,
 };
 
-typedef float Size;  // can also be WRAP_CONTENT or FILL_PARENT.
-
 enum Orientation {
 	ORIENT_HORIZONTAL,
 	ORIENT_VERTICAL,

Common/UI/ViewGroup.cpp

@@ -22,7 +22,7 @@
 
 namespace UI {
 
-const float ITEM_HEIGHT = 64.f;
+static constexpr Size ITEM_HEIGHT = 64.f;
 
 void ApplyGravity(const Bounds outer, const Margins &margins, float w, float h, int gravity, Bounds &inner) {
 	inner.w = w;