Mercurial > MadButterfly

annotate src/event.c @ 148:fce696643b1e

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author Thinker K.F. Li <thinker@branda.to>
date Thu, 25 Sep 2008 10:14:19 +0800
parents 1695a4b02b14
children c1cdd3fcd28f
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"
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5 #include "redraw_man.h"
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6 #include "shapes.h"
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7
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8 #define OK 0
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9 #define ERR -1
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10
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1695a4b02b14 Members of coords are geos instead of shapes, now.
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11 #define ARRAY_EXT_SZ 64
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12
30
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13
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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14 static int extend_memblk(void **buf, int o_size, int n_size) {
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15 void *new_buf;
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16
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17 new_buf = realloc(*buf, n_size);
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18 if(new_buf == NULL)
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19 return ERR;
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20
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21 *buf = new_buf;
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22
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23 return OK;
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24 }
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25
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26 /*! \brief Add a geo_t object to general geo list.
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27 *
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28 * General geo list can use to temporary keep a list of geo_t
e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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29 * 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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30 * 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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31 * from a redraw manager.
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32 */
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33 static int add_gen_geo(redraw_man_t *rdman, geo_t *geo) {
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34 int max_gen_geos;
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35 int r;
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36
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37 if(rdman->n_gen_geos >= rdman->max_gen_geos) {
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1695a4b02b14 Members of coords are geos instead of shapes, now.
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38 max_gen_geos = rdman->max_gen_geos + ARRAY_EXT_SZ;
30
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39 r = extend_memblk((void **)&rdman->gen_geos,
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40 sizeof(geo_t *) * rdman->n_gen_geos,
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41 sizeof(geo_t *) * max_gen_geos);
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42 if(r != OK)
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43 return ERR;
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44 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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45 }
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46
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47 rdman->gen_geos[rdman->n_gen_geos++] = geo;
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48 return OK;
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49 }
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50
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51 static int collect_shapes_at_point(redraw_man_t *rdman,
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52 co_aix x, co_aix y) {
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53 geo_t *geo;
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54 int r;
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55
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56 r = rdman_force_clean(rdman);
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57 if(r != OK)
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58 return ERR;
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59
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60 rdman->n_gen_geos = 0;
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61
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62 for(geo = rdman_geos(rdman, NULL);
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63 geo != NULL;
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64 geo = rdman_geos(rdman, geo)) {
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65 if(geo_pos_is_in(geo, x, y)) {
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66 r = add_gen_geo(rdman, geo);
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67 if(r != OK)
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68 return ERR;
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69 }
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70 }
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71
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72 return OK;
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73 }
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74
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75 static void draw_shape_path(shape_t *shape, cairo_t *cr) {
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76 switch(shape->sh_type) {
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77 case SHT_PATH:
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78 sh_path_draw(shape, cr);
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79 break;
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80 case SHT_TEXT:
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81 sh_text_draw(shape, cr);
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82 break;
35
581a03196093 Support rectangle tag of SVG.
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83 case SHT_RECT:
581a03196093 Support rectangle tag of SVG.
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84 sh_rect_draw(shape, cr);
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85 break;
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86 }
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87 }
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88
70
92cfabe22d6b find_shape_at_pos() finds a shape from clean ones.
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89 static geo_t *find_geo_in_pos(redraw_man_t *rdman,
30
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90 co_aix x, co_aix y, int *in_stroke) {
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91 geo_t *geo;
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92 geo_t **geos;
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93 shape_t *shape;
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94 cairo_t *cr;
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95 int i;
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96
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97 geos = rdman->gen_geos;
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98 cr = rdman->cr;
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99 for(i = rdman->n_gen_geos - 1; i >= 0; i--) {
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100 geo = geos[i];
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23bc382d9683 find_geo_in_pos() should return shapes that is not hidden
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101 if(geo->flags & GEF_HIDDEN)
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92cfabe22d6b find_shape_at_pos() finds a shape from clean ones.
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102 continue;
30
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103 shape = geo->shape;
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104 draw_shape_path(shape, cr);
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105 if(shape->fill) {
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106 if(cairo_in_fill(cr, x, y)) {
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107 *in_stroke = 0;
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69c8e264890d Remove old path after every shape checking for a position.
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108 cairo_new_path(rdman->cr);
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109 return geo;
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110 }
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111 }
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112 if(shape->stroke) {
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113 if(cairo_in_stroke(cr, x, y)) {
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114 *in_stroke = 1;
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115 cairo_new_path(rdman->cr);
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116 return geo;
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117 }
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118 }
32
69c8e264890d Remove old path after every shape checking for a position.
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119 cairo_new_path(rdman->cr);
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120 }
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121
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122 return NULL;
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123 }
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124
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125 shape_t *find_shape_at_pos(redraw_man_t *rdman,
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126 co_aix x, co_aix y, int *in_stroke) {
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127 geo_t *geo;
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128 int r;
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129
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Thinker K.F. Li <thinker@branda.to>
parents:
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130 r = collect_shapes_at_point(rdman, x, y);
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 if(r != OK)
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Thinker K.F. Li <thinker@branda.to>
parents:
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132 return NULL;
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Thinker K.F. Li <thinker@branda.to>
parents:
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133
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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134 geo = find_geo_in_pos(rdman, x, y, in_stroke);
30
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Thinker K.F. Li <thinker@branda.to>
parents:
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135 if(geo == NULL)
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Thinker K.F. Li <thinker@branda.to>
parents:
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136 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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137
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Thinker K.F. Li <thinker@branda.to>
parents:
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138 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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139 }