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nuclear@6
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1 #include <stdio.h>
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nuclear@6
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2 #include <assert.h>
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3 #include "imtk.h"
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4 #include "state.h"
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5 #include "draw.h"
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6
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7 #define SLIDER_SIZE 100
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8 #define THUMB_WIDTH 10
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9 #define THUMB_HEIGHT 20
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10
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11 static void draw_slider(int id, float pos, float min, float max, int x, int y);
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12
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13 float imtk_slider(int id, float pos, float min, float max, int x, int y)
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14 {
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15 int mousex, mousey, thumb_x, thumb_y, over = 0;
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16 float range = max - min;
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17
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18 assert(id >= 0);
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19
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20 imtk_get_mouse(&mousex, &mousey);
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21
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22 pos = (pos - min) / range;
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23 if(pos < 0.0) pos = 0.0;
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24 if(pos > 1.0) pos = 1.0;
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25
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26 thumb_x = x + SLIDER_SIZE * pos - THUMB_WIDTH / 2;
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27 thumb_y = y - THUMB_HEIGHT / 2;
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28
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29 if(imtk_hit_test(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT)) {
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30 imtk_set_hot(id);
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31 over = 1;
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32 }
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33
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34 if(imtk_button_state(IMTK_LEFT_BUTTON)) {
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35 if(over && imtk_is_hot(id)) {
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36 if(!imtk_is_active(id)) {
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37 imtk_set_prev_mouse(mousex, mousey);
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38 }
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39 imtk_set_active(id);
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40 }
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nuclear@6
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41 } else {
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42 if(imtk_is_active(id)) {
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43 imtk_set_active(-1);
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44 }
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45 }
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46
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47 if(imtk_is_active(id)) {
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48 int prevx;
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49 float dx;
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50
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51 imtk_get_prev_mouse(&prevx, 0);
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52
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53 dx = (float)(mousex - prevx) / (float)SLIDER_SIZE;
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54 pos += dx;
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55 imtk_set_prev_mouse(mousex, mousey);
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56
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57 if(pos < 0.0) pos = 0.0;
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58 if(pos > 1.0) pos = 1.0;
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59 }
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60
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61 draw_slider(id, pos, min, max, x, y);
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62 return pos * range + min;
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63 }
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64
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65
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66 static void draw_slider(int id, float pos, float min, float max, int x, int y)
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67 {
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68 float range = max - min;
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69 int thumb_x, thumb_y;
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70 char buf[32];
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71
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72 thumb_x = x + SLIDER_SIZE * pos - THUMB_WIDTH / 2;
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73 thumb_y = y - THUMB_HEIGHT / 2;
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74
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75 /* draw trough */
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76 imtk_draw_rect(x, y - 2, SLIDER_SIZE, 4, imtk_get_color(IMTK_BASE_COLOR));
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77 imtk_draw_frame(x, y - 2, SLIDER_SIZE, 4, FRAME_INSET);
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78
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79 if(imtk_hit_test(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT)) {
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80 glColor4fv(imtk_get_color(IMTK_FOCUS_COLOR));
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81 } else {
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82 glColor4fv(imtk_get_color(IMTK_BASE_COLOR));
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83 }
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84
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85 /* draw handle */
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86 imtk_draw_rect(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT, 0);
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87 imtk_draw_frame(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT, FRAME_OUTSET);
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88
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89 /* draw display */
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90 sprintf(buf, "%.3f", pos * range + min);
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91 glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
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92 imtk_draw_string(x + SLIDER_SIZE + THUMB_WIDTH / 2 + 2, y + 4, buf);
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93 }
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94
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