nuclear@6: #include <stdio.h>
nuclear@6: #include <assert.h>
nuclear@6: #include "imtk.h"
nuclear@6: #include "state.h"
nuclear@6: #include "draw.h"
nuclear@6: 
nuclear@6: #define SLIDER_SIZE		100
nuclear@6: #define THUMB_WIDTH		10
nuclear@6: #define THUMB_HEIGHT	20
nuclear@6: 
nuclear@6: static void draw_slider(int id, float pos, float min, float max, int x, int y);
nuclear@6: 
nuclear@6: float imtk_slider(int id, float pos, float min, float max, int x, int y)
nuclear@6: {
nuclear@6: 	int mousex, mousey, thumb_x, thumb_y, over = 0;
nuclear@6: 	float range = max - min;
nuclear@6: 
nuclear@6: 	assert(id >= 0);
nuclear@6: 
nuclear@6: 	imtk_get_mouse(&mousex, &mousey);
nuclear@6: 
nuclear@6: 	pos = (pos - min) / range;
nuclear@6: 	if(pos < 0.0) pos = 0.0;
nuclear@6: 	if(pos > 1.0) pos = 1.0;
nuclear@6: 
nuclear@6: 	thumb_x = x + SLIDER_SIZE * pos - THUMB_WIDTH / 2;
nuclear@6: 	thumb_y = y - THUMB_HEIGHT / 2;
nuclear@6: 
nuclear@6: 	if(imtk_hit_test(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT)) {
nuclear@6: 		imtk_set_hot(id);
nuclear@6: 		over = 1;
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	if(imtk_button_state(IMTK_LEFT_BUTTON)) {
nuclear@6: 		if(over && imtk_is_hot(id)) {
nuclear@6: 			if(!imtk_is_active(id)) {
nuclear@6: 				imtk_set_prev_mouse(mousex, mousey);
nuclear@6: 			}
nuclear@6: 			imtk_set_active(id);
nuclear@6: 		}
nuclear@6: 	} else {
nuclear@6: 		if(imtk_is_active(id)) {
nuclear@6: 			imtk_set_active(-1);
nuclear@6: 		}
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	if(imtk_is_active(id)) {
nuclear@6: 		int prevx;
nuclear@6: 		float dx;
nuclear@6: 
nuclear@6: 		imtk_get_prev_mouse(&prevx, 0);
nuclear@6: 
nuclear@6: 		dx = (float)(mousex - prevx) / (float)SLIDER_SIZE;
nuclear@6: 		pos += dx;
nuclear@7: 		imtk_set_prev_mouse(mousex, mousey);
nuclear@6: 
nuclear@6: 		if(pos < 0.0) pos = 0.0;
nuclear@6: 		if(pos > 1.0) pos = 1.0;
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	draw_slider(id, pos, min, max, x, y);
nuclear@6: 	return pos * range + min;
nuclear@6: }
nuclear@6: 
nuclear@6: 
nuclear@6: static void draw_slider(int id, float pos, float min, float max, int x, int y)
nuclear@6: {
nuclear@6: 	float range = max - min;
nuclear@6: 	int thumb_x, thumb_y;
nuclear@6: 	char buf[32];
nuclear@6: 
nuclear@6: 	thumb_x = x + SLIDER_SIZE * pos - THUMB_WIDTH / 2;
nuclear@6: 	thumb_y = y - THUMB_HEIGHT / 2;
nuclear@6: 
nuclear@6: 	/* draw trough */
nuclear@8: 	imtk_draw_rect(x, y - 2, SLIDER_SIZE, 4, imtk_get_color(IMTK_BASE_COLOR));
nuclear@6: 	imtk_draw_frame(x, y - 2, SLIDER_SIZE, 4, FRAME_INSET);
nuclear@6: 
nuclear@6: 	if(imtk_hit_test(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT)) {
nuclear@6: 		glColor4fv(imtk_get_color(IMTK_FOCUS_COLOR));
nuclear@6: 	} else {
nuclear@6: 		glColor4fv(imtk_get_color(IMTK_BASE_COLOR));
nuclear@6: 	}
nuclear@6: 
nuclear@6: 	/* draw handle */
nuclear@8: 	imtk_draw_rect(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT, 0);
nuclear@6: 	imtk_draw_frame(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT, FRAME_OUTSET);
nuclear@6: 
nuclear@6: 	/* draw display */
nuclear@6: 	sprintf(buf, "%.3f", pos * range + min);
nuclear@6: 	glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
nuclear@6: 	imtk_draw_string(x + SLIDER_SIZE + THUMB_WIDTH / 2 + 2, y + 4, buf);
nuclear@6: }
nuclear@6: