diff --git a/winarea_d2d/ui_old.h b/winarea_d2d/ui_old.h
new file mode 100644
index 00000000..86cb1e98
--- /dev/null
+++ b/winarea_d2d/ui_old.h
@@ -0,0 +1,177 @@
+// 4 september 2015
+
+typedef struct uiArea uiArea;
+typedef struct uiAreaHandler uiAreaHandler;
+typedef struct uiAreaDrawParams uiAreaDrawParams;
+typedef struct uiAreaMouseEvent uiAreaMouseEvent;
+typedef struct uiAreaKeyEvent uiAreaKeyEvent;
+
+typedef struct uiDrawContext uiDrawContext;
+
+struct uiAreaHandler {
+	void (*Draw)(uiAreaHandler *, uiArea *, uiAreaDrawParams *);
+	uintmax_t (*HScrollMax)(uiAreaHandler *, uiArea *);
+	uintmax_t (*VScrollMax)(uiAreaHandler *, uiArea *);
+	int (*RedrawOnResize)(uiAreaHandler *, uiArea *);
+	void (*MouseEvent)(uiAreaHandler *, uiArea *, uiAreaMouseEvent *);
+	void (*DragBroken)(uiAreaHandler *, uiArea *);
+	int (*KeyEvent)(uiAreaHandler *, uiArea *, uiAreaKeyEvent *);
+};
+
+struct uiAreaDrawParams {
+	uiDrawContext *Context;
+
+	intmax_t ClientWidth;
+	intmax_t ClientHeight;
+
+	intmax_t ClipX;
+	intmax_t ClipY;
+	intmax_t ClipWidth;
+	intmax_t ClipHeight;
+
+	int DPIX;
+	int DPIY;
+
+	intmax_t HScrollPos;
+	intmax_t VScrollPos;
+};
+
+// TODO proper sources
+// TODO dotting/dashing
+
+typedef struct uiDrawStrokeParams uiDrawStrokeParams;
+typedef enum uiDrawLineCap uiDrawLineCap;
+typedef enum uiDrawLineJoin uiDrawLineJoin;
+typedef enum uiDrawFillMode uiDrawFillMode;
+
+enum uiDrawLineCap {
+	uiDrawLineCapFlat,
+	uiDrawLineCapRound,
+	uiDrawLineCapSquare,
+};
+
+enum uiDrawLineJoin {
+	uiDrawLineJoinMiter,
+	uiDrawLineJoinRound,
+	uiDrawLineJoinBevel,
+};
+
+// this is the default for botoh cairo and GDI
+// Core Graphics doesn't explicitly specify a default, but NSBezierPath allows you to choose one, and this is the initial value
+// so we're good to use it too!
+#define uiDrawDefaultMiterLimit 10.0
+
+enum uiDrawFillMode {
+	uiDrawFillModeWinding,
+	uiDrawFillModeAlternate,
+};
+
+struct uiDrawStrokeParams {
+	uiDrawLineCap Cap;
+	uiDrawLineJoin Join;
+	intmax_t Thickness;
+	double MiterLimit;
+};
+
+void uiDrawBeginPathRGB(uiDrawContext *, uint8_t, uint8_t, uint8_t);
+// TODO verify these aren't alpha premultiplied anywhere
+void uiDrawBeginPathRGBA(uiDrawContext *, uint8_t, uint8_t, uint8_t, uint8_t);
+
+void uiDrawMoveTo(uiDrawContext *, intmax_t, intmax_t);
+void uiDrawLineTo(uiDrawContext *, intmax_t, intmax_t);
+void uiDrawRectangle(uiDrawContext *, intmax_t, intmax_t, intmax_t, intmax_t);
+// notes: angles are both relative to 0 and go counterclockwise
+void uiDrawArcTo(uiDrawContext *, intmax_t, intmax_t, intmax_t, double, double, int);
+// TODO behavior when there is no initial point on Windows and OS X
+void uiDrawBezierTo(uiDrawContext *, intmax_t, intmax_t, intmax_t, intmax_t, intmax_t, intmax_t);
+void uiDrawCloseFigure(uiDrawContext *);
+
+void uiDrawStroke(uiDrawContext *, uiDrawStrokeParams *);
+void uiDrawFill(uiDrawContext *, uiDrawFillMode);
+
+// TODO primitives:
+// - rounded rectangles
+// - elliptical arcs
+// - quadratic bezier curves
+
+typedef enum uiModifiers uiModifiers;
+
+enum uiModifiers {
+	uiModifierCtrl = 1 << 0,
+	uiModifierAlt = 1 << 1,
+	uiModifierShift = 1 << 2,
+	uiModifierSuper = 1 << 3,
+};
+
+struct uiAreaMouseEvent {
+	intmax_t X;
+	intmax_t Y;
+
+	intmax_t ClientWidth;
+	intmax_t ClientHeight;
+	intmax_t HScrollPos;
+	intmax_t VScrollPos;
+
+	uintmax_t Down;
+	uintmax_t Up;
+
+	uintmax_t Count;
+
+	uiModifiers Modifiers;
+
+	uint64_t Held1To64;
+};
+
+typedef enum uiExtKey uiExtKey;
+
+enum uiExtKey {
+	uiExtKeyEscape = 1,
+	uiExtKeyInsert,			// equivalent to "Help" on Apple keyboards
+	uiExtKeyDelete,
+	uiExtKeyHome,
+	uiExtKeyEnd,
+	uiExtKeyPageUp,
+	uiExtKeyPageDown,
+	uiExtKeyUp,
+	uiExtKeyDown,
+	uiExtKeyLeft,
+	uiExtKeyRight,
+	uiExtKeyF1,			// F1..F12 are guaranteed to be consecutive
+	uiExtKeyF2,
+	uiExtKeyF3,
+	uiExtKeyF4,
+	uiExtKeyF5,
+	uiExtKeyF6,
+	uiExtKeyF7,
+	uiExtKeyF8,
+	uiExtKeyF9,
+	uiExtKeyF10,
+	uiExtKeyF11,
+	uiExtKeyF12,
+	uiExtKeyN0,			// numpad keys; independent of Num Lock state
+	uiExtKeyN1,			// N0..N9 are guaranteed to be consecutive
+	uiExtKeyN2,
+	uiExtKeyN3,
+	uiExtKeyN4,
+	uiExtKeyN5,
+	uiExtKeyN6,
+	uiExtKeyN7,
+	uiExtKeyN8,
+	uiExtKeyN9,
+	uiExtKeyNDot,
+	uiExtKeyNEnter,
+	uiExtKeyNAdd,
+	uiExtKeyNSubtract,
+	uiExtKeyNMultiply,
+	uiExtKeyNDivide,
+};
+
+struct uiAreaKeyEvent {
+	char Key;
+	uiExtKey ExtKey;
+	uiModifiers Modifier;
+
+	uiModifiers Modifiers;
+
+	int Up;
+};