1 files changed, 113 insertions, 0 deletions
diff --git a/src/controls.h b/src/controls.h
new file mode 100644
index 0000000..29e687a
--- /dev/null
+++ b/src/controls.h
@@ -0,0 +1,113 @@
+
+#ifndef __CONTROLS_H
+#define __CONTROLS_H
+
+#include <SDL.h>
+
+#include "osc.h"
+
+struct Paint {
+	enum Paint_Type {
+		PAINT_PLAIN = 0,
+		PAINT_GRAD
+	} type;
+
+	union {
+		struct Paint_Plain {
+			Uint32 color;
+		} plain;
+
+		struct Paint_Grad {
+			SDL_Color top;
+			SDL_Color bottom;
+		} grad;
+	} u;
+};
+
+struct Control {
+	enum Control_Type {
+		SLIDER = 0,
+		FIELD
+	} type;
+
+	SDL_Rect geo;
+
+	struct Control_OSC {
+		char			*address;
+		enum Osc_DataType	datatype;
+	} OSC;
+
+	union {
+		struct Slider {
+			enum Slider_Type {
+				SLIDER_BUTTON = 0,
+				SLIDER_SET,
+				SLIDER_RELATIVE
+			} type;
+			#define SLIDER_TYPE	\
+				"button\0"	\
+				"set\0"		\
+				"relative\0"
+
+			struct Paint	paint;
+
+			double		min;
+			double		max;
+			double		step;
+
+			double		value;
+
+			char		*label;
+			Uint8		show_value;
+
+			union {
+				struct Slider_Button {
+					Uint16 button_y;
+				} button;
+			} u;
+		} slider;
+
+		struct Field {
+			enum Field_Type {
+				FIELD_BUTTON = 0,
+				FIELD_SWITCH
+			} type;
+
+			Uint32	color;
+			Uint8	value;
+			char	*label;
+		} field;
+	} u;
+};
+
+				/* slider inner padding is 1/2000 of its area */
+#define SLIDER_PADDING(C) ((C)->geo.w*(C)->geo.h/2000)
+
+static inline void Controls_SetSliderValue(struct Slider *slider, double value);
+static inline void Controls_InitSliderButton(struct Control *c);
+
+int Controls_Slider(SDL_Surface *s, struct Control *c);
+int Controls_Field(SDL_Surface *s, struct Control *c);
+int Controls_Draw(SDL_Surface *s, struct Control *c);
+
+static inline void
+Controls_SetSliderValue(struct Slider *slider, double value)
+{
+	slider->value = slider->step ?
+			(Uint32)((value - slider->min)/slider->step+.5)*
+			slider->step + slider->min : value;
+}
+
+static inline void
+Controls_InitSliderButton(struct Control *c)
+{
+	struct Slider	*slider = &c->u.slider;
+	Uint16		padding = SLIDER_PADDING(c);
+
+	slider->u.button.button_y = c->geo.y + (c->geo.h - (padding << 1))*
+					(1. - (slider->value - slider->min)/
+					 (slider->max - slider->min)) - padding;
+}
+
+#endif
+