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nuclear@10
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1 #include <stdio.h>
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nuclear@10
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2 #include <string.h>
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3 #include <assert.h>
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4 #include "imtk.h"
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5 #include "state.h"
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6 #include "draw.h"
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7
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8 #define SLIDER_SIZE 100
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9 #define THUMB_WIDTH 10
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10 #define THUMB_HEIGHT 20
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11
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12 static int draw_slider(int id, float pos, float min, float max, int x, int y, int over);
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13
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14 float imtk_slider(int id, float pos, float min, float max, int x, int y)
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15 {
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16 int mousex, mousey, thumb_x, thumb_y, txsz, over = 0;
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17 float range = max - min;
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18
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19 assert(id >= 0);
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20
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21 if(x == IMTK_AUTO || y == IMTK_AUTO) {
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22 imtk_layout_get_pos(&x, &y);
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23 }
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24 y += THUMB_HEIGHT / 2;
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25
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26 imtk_get_mouse(&mousex, &mousey);
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27
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28 pos = (pos - min) / range;
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29 if(pos < 0.0) pos = 0.0;
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30 if(pos > 1.0) pos = 1.0;
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31
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32 thumb_x = x + SLIDER_SIZE * pos - THUMB_WIDTH / 2;
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33 thumb_y = y - THUMB_HEIGHT / 2;
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34
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35 if(imtk_hit_test(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT)) {
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36 imtk_set_hot(id);
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37 over = 1;
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38 }
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39
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40 if(imtk_button_state(IMTK_LEFT_BUTTON)) {
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41 if(over && imtk_is_hot(id)) {
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42 if(!imtk_is_active(id)) {
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43 imtk_set_prev_mouse(mousex, mousey);
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44 }
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45 imtk_set_active(id);
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46 }
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nuclear@10
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47 } else {
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48 if(imtk_is_active(id)) {
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49 imtk_set_active(-1);
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50 }
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51 }
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52
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53 if(imtk_is_active(id)) {
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54 int prevx;
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55 float dx;
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56
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57 imtk_get_prev_mouse(&prevx, 0);
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58
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59 dx = (float)(mousex - prevx) / (float)SLIDER_SIZE;
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60 pos += dx;
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61 imtk_set_prev_mouse(mousex, mousey);
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62
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63 if(pos < 0.0) pos = 0.0;
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64 if(pos > 1.0) pos = 1.0;
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65 }
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66
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67 txsz = draw_slider(id, pos, min, max, x, y, over);
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68 imtk_layout_advance(SLIDER_SIZE + THUMB_WIDTH + txsz, THUMB_HEIGHT);
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69 return pos * range + min;
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70 }
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71
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72
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73 static int draw_slider(int id, float pos, float min, float max, int x, int y, int over)
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74 {
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75 float range = max - min;
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76 int thumb_x, thumb_y;
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77 char buf[32];
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78 float tcol[4], bcol[4];
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79 unsigned int attr = 0;
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80
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81 thumb_x = x + SLIDER_SIZE * pos - THUMB_WIDTH / 2;
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82 thumb_y = y - THUMB_HEIGHT / 2;
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83
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84 memcpy(tcol, imtk_get_color(IMTK_BOTTOM_COLOR), sizeof tcol);
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85 memcpy(bcol, imtk_get_color(IMTK_TOP_COLOR), sizeof bcol);
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86
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87 /* draw trough */
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88 imtk_draw_rect(x, y - 2, SLIDER_SIZE, 5, tcol, bcol);
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89 imtk_draw_frame(x, y - 2, SLIDER_SIZE, 5, FRAME_INSET);
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90
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91 if(over) {
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92 attr |= IMTK_FOCUS_BIT;
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93 }
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94 if(imtk_is_active(id)) {
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95 attr |= IMTK_PRESS_BIT;
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96 }
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97 memcpy(tcol, imtk_get_color(IMTK_TOP_COLOR | attr), sizeof tcol);
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98 memcpy(bcol, imtk_get_color(IMTK_BOTTOM_COLOR | attr), sizeof bcol);
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99
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100 /* draw handle */
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101 imtk_draw_rect(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT, tcol, bcol);
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102 imtk_draw_frame(thumb_x, thumb_y, THUMB_WIDTH, THUMB_HEIGHT, FRAME_OUTSET);
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103
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104 /* draw display */
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105 sprintf(buf, "%.3f", pos * range + min);
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106 glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
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107 imtk_draw_string(x + SLIDER_SIZE + THUMB_WIDTH / 2 + 2, y + 4, buf);
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108 return imtk_string_size(buf);
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109 }
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110
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