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annotate src/event.c @ 213:a0a3196b1a05

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Refactory pointer computation into a macro. - It is hard to read a complicate pointer calculation. A macro can make it more easy to be read.
author Thinker K.F. Li <thinker@branda.to>
date Fri, 12 Dec 2008 09:35:27 +0800
parents c234ee745ceb
children 527894c2ad39
rev   line source
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e06a4a667ce2 Accept mouse/pointer event and hint the shape that the pointer is over.
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <cairo.h>
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530bb7728546 Move header files to $(top_srcdir)/include/ and prefixed with 'mb_'.
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4 #include "mb_types.h"
530bb7728546 Move header files to $(top_srcdir)/include/ and prefixed with 'mb_'.
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5 #include "mb_redraw_man.h"
530bb7728546 Move header files to $(top_srcdir)/include/ and prefixed with 'mb_'.
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6 #include "mb_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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11 #define ARRAY_EXT_SZ 64
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12
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13
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c1cdd3fcd28f Postponing rdman_coord_free() and rdman_remove_shape().
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14 DARRAY_DEFINE(geos, geo_t *);
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15
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16 /*! \brief Add a geo_t object to general geo list.
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17 *
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18 * General geo list can use to temporary keep a list of geo_t
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19 * objects for any purpose. It supposed to be reused by
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20 * different modules that need to select part of geo_t objects
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21 * from a redraw manager.
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22 */
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23 static int add_gen_geo(redraw_man_t *rdman, geo_t *geo) {
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24 int r;
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25
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c1cdd3fcd28f Postponing rdman_coord_free() and rdman_remove_shape().
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26 r = geos_add(&rdman->gen_geos, geo);
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27 return r == 0? OK: ERR;
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28 }
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29
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30 static int collect_shapes_at_point(redraw_man_t *rdman,
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31 co_aix x, co_aix y) {
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32 geo_t *geo;
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33 int r;
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34
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35 r = rdman_force_clean(rdman);
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36 if(r != OK)
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37 return ERR;
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38
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39 rdman->gen_geos.num = 0;
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40
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41 for(geo = rdman_geos(rdman, NULL);
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42 geo != NULL;
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43 geo = rdman_geos(rdman, geo)) {
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44 if(geo_pos_is_in(geo, x, y)) {
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45 r = add_gen_geo(rdman, geo);
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46 if(r != OK)
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47 return ERR;
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48 }
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49 }
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50
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51 return OK;
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52 }
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53
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54 static void draw_shape_path(shape_t *shape, cairo_t *cr) {
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c234ee745ceb Start moving to mb_obj_t
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55 switch(MBO_TYPE(shape)) {
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56 case MBO_PATH:
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57 sh_path_draw(shape, cr);
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58 break;
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59 case MBO_TEXT:
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60 sh_text_draw(shape, cr);
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61 break;
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62 case MBO_RECT:
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581a03196093 Support rectangle tag of SVG.
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63 sh_rect_draw(shape, cr);
581a03196093 Support rectangle tag of SVG.
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64 break;
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65 }
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66 }
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67
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68 static geo_t *find_geo_in_pos(redraw_man_t *rdman,
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69 co_aix x, co_aix y, int *in_stroke) {
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70 geo_t *geo;
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71 geo_t **geos;
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72 shape_t *shape;
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73 cairo_t *cr;
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74 int i;
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75
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c1cdd3fcd28f Postponing rdman_coord_free() and rdman_remove_shape().
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76 geos = rdman->gen_geos.ds;
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77 cr = rdman->cr;
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78 for(i = rdman->gen_geos.num - 1; i >= 0; i--) {
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79 geo = geos[i];
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23bc382d9683 find_geo_in_pos() should return shapes that is not hidden
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80 if(geo->flags & GEF_HIDDEN)
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81 continue;
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82 shape = geo->shape;
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83 draw_shape_path(shape, cr);
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84 if(shape->fill) {
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85 if(cairo_in_fill(cr, x, y)) {
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86 *in_stroke = 0;
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87 cairo_new_path(rdman->cr);
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88 return geo;
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89 }
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90 }
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91 if(shape->stroke) {
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92 if(cairo_in_stroke(cr, x, y)) {
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93 *in_stroke = 1;
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94 cairo_new_path(rdman->cr);
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95 return geo;
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96 }
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97 }
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98 cairo_new_path(rdman->cr);
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99 }
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100
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101 return NULL;
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102 }
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103
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104 shape_t *find_shape_at_pos(redraw_man_t *rdman,
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105 co_aix x, co_aix y, int *in_stroke) {
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106 geo_t *geo;
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107 int r;
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108
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109 r = collect_shapes_at_point(rdman, x, y);
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110 if(r != OK)
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111 return NULL;
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112
70
92cfabe22d6b find_shape_at_pos() finds a shape from clean ones.
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113 geo = find_geo_in_pos(rdman, x, y, in_stroke);
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114 if(geo == NULL)
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115 return NULL;
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116
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117 return geo->shape;
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118 }