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annotate src/event.c @ 87:8dfebf76cb59

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reduce size of svg2code_ex.svg
author Thinker K.F. Li <thinker@branda.to>
date Fri, 22 Aug 2008 16:41:11 +0800
parents 23bc382d9683
children 1695a4b02b14
rev   line source
30
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
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diff changeset
1 #include <stdio.h>
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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2 #include <stdlib.h>
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3 #include <cairo.h>
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4 #include "mb_types.h"
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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5 #include "redraw_man.h"
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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6 #include "shapes.h"
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7
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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8 #define OK 0
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9 #define ERR -1
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10
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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11
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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12 static int extend_memblk(void **buf, int o_size, int n_size) {
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13 void *new_buf;
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14
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15 new_buf = realloc(*buf, n_size);
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16 if(new_buf == NULL)
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17 return ERR;
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18
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19 *buf = new_buf;
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20
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21 return OK;
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22 }
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23
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24 /*! \brief Add a geo_t object to general geo list.
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25 *
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26 * General geo list can use to temporary keep a list of geo_t
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27 * objects for any purpose. It supposed to be reused by
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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28 * different modules that need to select part of geo_t objects
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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29 * from a redraw manager.
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30 */
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31 static int add_gen_geo(redraw_man_t *rdman, geo_t *geo) {
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32 int max_gen_geos;
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33 int r;
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34
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35 if(rdman->n_gen_geos >= rdman->max_gen_geos) {
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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36 max_gen_geos = rdman->n_geos;
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37 r = extend_memblk((void **)&rdman->gen_geos,
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38 sizeof(geo_t *) * rdman->n_gen_geos,
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39 sizeof(geo_t *) * max_gen_geos);
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40 if(r != OK)
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41 return ERR;
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42 rdman->max_gen_geos = max_gen_geos;
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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43 }
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44
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45 rdman->gen_geos[rdman->n_gen_geos++] = geo;
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46 return OK;
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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47 }
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48
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49 static int collect_shapes_at_point(redraw_man_t *rdman,
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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50 co_aix x, co_aix y) {
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51 geo_t *geo;
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52 int r;
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53
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54 r = rdman_force_clean(rdman);
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55 if(r != OK)
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56 return ERR;
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57
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58 rdman->n_gen_geos = 0;
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59
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60 for(geo = STAILQ_HEAD(rdman->all_geos);
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61 geo != NULL;
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62 geo = STAILQ_NEXT(geo_t, next, geo)) {
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63 if(geo_pos_is_in(geo, x, y)) {
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64 r = add_gen_geo(rdman, geo);
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65 if(r != OK)
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66 return ERR;
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67 }
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68 }
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69
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70 return OK;
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71 }
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72
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73 static void draw_shape_path(shape_t *shape, cairo_t *cr) {
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74 switch(shape->sh_type) {
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75 case SHT_PATH:
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76 sh_path_draw(shape, cr);
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77 break;
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78 case SHT_TEXT:
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79 sh_text_draw(shape, cr);
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80 break;
35
581a03196093 Support rectangle tag of SVG.
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81 case SHT_RECT:
581a03196093 Support rectangle tag of SVG.
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82 sh_rect_draw(shape, cr);
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83 break;
30
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84 }
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85 }
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86
70
92cfabe22d6b find_shape_at_pos() finds a shape from clean ones.
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87 static geo_t *find_geo_in_pos(redraw_man_t *rdman,
30
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88 co_aix x, co_aix y, int *in_stroke) {
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89 geo_t *geo;
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90 geo_t **geos;
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91 shape_t *shape;
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92 cairo_t *cr;
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93 int i;
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94
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95 geos = rdman->gen_geos;
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96 cr = rdman->cr;
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97 for(i = rdman->n_gen_geos - 1; i >= 0; i--) {
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98 geo = geos[i];
75
23bc382d9683 find_geo_in_pos() should return shapes that is not hidden
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99 if(geo->flags & GEF_HIDDEN)
70
92cfabe22d6b find_shape_at_pos() finds a shape from clean ones.
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100 continue;
30
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101 shape = geo->shape;
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102 draw_shape_path(shape, cr);
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103 if(shape->fill) {
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104 if(cairo_in_fill(cr, x, y)) {
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105 *in_stroke = 0;
32
69c8e264890d Remove old path after every shape checking for a position.
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106 cairo_new_path(rdman->cr);
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107 return geo;
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108 }
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109 }
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110 if(shape->stroke) {
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111 if(cairo_in_stroke(cr, x, y)) {
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112 *in_stroke = 1;
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113 cairo_new_path(rdman->cr);
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114 return geo;
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115 }
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116 }
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117 cairo_new_path(rdman->cr);
30
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118 }
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119
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120 return NULL;
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121 }
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122
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123 shape_t *find_shape_at_pos(redraw_man_t *rdman,
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124 co_aix x, co_aix y, int *in_stroke) {
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125 geo_t *geo;
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126 int r;
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127
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128 r = collect_shapes_at_point(rdman, x, y);
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129 if(r != OK)
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
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130 return NULL;
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
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131
70
92cfabe22d6b find_shape_at_pos() finds a shape from clean ones.
Thinker K.F. Li <thinker@branda.to>
parents: 35
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132 geo = find_geo_in_pos(rdman, x, y, in_stroke);
30
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
133 if(geo == NULL)
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
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134 return NULL;
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
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135
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
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136 return geo->shape;
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
Thinker K.F. Li <thinker@branda.to>
parents:
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137 }