imtk
annotate src/layout.c @ 23:4c2b3e281409
added a half-assed automatic layout thing
| author | John Tsiombikas <nuclear@siggraph.org> |
|---|---|
| date | Sat, 28 May 2011 22:31:51 +0300 |
| parents | |
| children | f416d8def7ef |
| rev | line source |
|---|---|
| nuclear@23 | 1 #include <string.h> |
| nuclear@23 | 2 #include "imtk.h" |
| nuclear@23 | 3 |
| nuclear@23 | 4 struct layout { |
| nuclear@23 | 5 int box[4], span[4]; |
| nuclear@23 | 6 int spacing; |
| nuclear@23 | 7 int dir; |
| nuclear@23 | 8 }; |
| nuclear@23 | 9 |
| nuclear@23 | 10 #define MAX_STACK_DEPTH 4 |
| nuclear@23 | 11 static struct layout st[MAX_STACK_DEPTH]; |
| nuclear@23 | 12 static int top = 0; |
| nuclear@23 | 13 |
| nuclear@23 | 14 int imtk_layout_push(void) |
| nuclear@23 | 15 { |
| nuclear@23 | 16 int newtop = top + 1; |
| nuclear@23 | 17 |
| nuclear@23 | 18 assert(newtop < MAX_STACK_DEPTH); |
| nuclear@23 | 19 if(newtop >= MAX_STACK_DEPTH) { |
| nuclear@23 | 20 return -1; |
| nuclear@23 | 21 } |
| nuclear@23 | 22 |
| nuclear@23 | 23 st[newtop] = st[top++]; |
| nuclear@23 | 24 return 0; |
| nuclear@23 | 25 } |
| nuclear@23 | 26 |
| nuclear@23 | 27 int imtk_layout_pop(void) |
| nuclear@23 | 28 { |
| nuclear@23 | 29 assert(top > 0); |
| nuclear@23 | 30 if(top <= 0) { |
| nuclear@23 | 31 return -1; |
| nuclear@23 | 32 } |
| nuclear@23 | 33 top--; |
| nuclear@23 | 34 } |
| nuclear@23 | 35 |
| nuclear@23 | 36 void imtk_layout_start(int x, int y, int sp, int dir) |
| nuclear@23 | 37 { |
| nuclear@23 | 38 st[top].box[0] = st[top].span[0] = x; |
| nuclear@23 | 39 st[top].box[1] = st[top].span[1] = y; |
| nuclear@23 | 40 st[top].box[2] = st[top].box[3] = st[top].span[2] = st[top].span[3] = 0; |
| nuclear@23 | 41 st[top].spacing = sp; |
| nuclear@23 | 42 st[top].dir = dir; |
| nuclear@23 | 43 } |
| nuclear@23 | 44 |
| nuclear@23 | 45 void imtk_layout_dir(int dir) |
| nuclear@23 | 46 { |
| nuclear@23 | 47 st[top].dir = dir; |
| nuclear@23 | 48 if(dir == IMTK_VERTICAL) { |
| nuclear@23 | 49 imtk_layout_newline(); |
| nuclear@23 | 50 } |
| nuclear@23 | 51 } |
| nuclear@23 | 52 |
| nuclear@23 | 53 void imtk_layout_advance(int width, int height) |
| nuclear@23 | 54 { |
| nuclear@23 | 55 int max_span_y, max_box_y; |
| nuclear@23 | 56 |
| nuclear@23 | 57 st[top].span[2] += width + st[top].spacing; |
| nuclear@23 | 58 |
| nuclear@23 | 59 if(height > st[top].span[3]) { |
| nuclear@23 | 60 st[top].span[3] = height; |
| nuclear@23 | 61 } |
| nuclear@23 | 62 |
| nuclear@23 | 63 max_span_y = st[top].span[1] + st[top].span[3]; |
| nuclear@23 | 64 max_box_y = st[top].box[1] + st[top].box[3]; |
| nuclear@23 | 65 |
| nuclear@23 | 66 if(max_span_y > max_box_y) { |
| nuclear@23 | 67 st[top].box[3] = max_span_y - st[top].box[1]; |
| nuclear@23 | 68 } |
| nuclear@23 | 69 if(st[top].span[2] > st[top].box[2]) { |
| nuclear@23 | 70 st[top].box[2] = st[top].span[2]; |
| nuclear@23 | 71 } |
| nuclear@23 | 72 |
| nuclear@23 | 73 if(st[top].dir == IMTK_VERTICAL) { |
| nuclear@23 | 74 imtk_layout_newline(); |
| nuclear@23 | 75 } |
| nuclear@23 | 76 } |
| nuclear@23 | 77 |
| nuclear@23 | 78 void imtk_layout_newline(void) |
| nuclear@23 | 79 { |
| nuclear@23 | 80 st[top].span[0] = st[top].box[0]; |
| nuclear@23 | 81 st[top].span[1] = st[top].box[1] + st[top].box[3] + spacing; |
| nuclear@23 | 82 st[top].span[2] = st[top].span[3] = 0; |
| nuclear@23 | 83 } |
| nuclear@23 | 84 |
| nuclear@23 | 85 void imtk_layout_get_pos(int *x, int *y) |
| nuclear@23 | 86 { |
| nuclear@23 | 87 *x = st[top].span[0] + st[top].span[2]; |
| nuclear@23 | 88 *y = st[top].span[1]; |
| nuclear@23 | 89 } |
| nuclear@23 | 90 |
| nuclear@23 | 91 void imtk_layout_get_bounds(int *bbox) |
| nuclear@23 | 92 { |
| nuclear@23 | 93 memcpy(bbox, st[top].box, sizeof st[top].box); |
| nuclear@23 | 94 } |