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annotate src/imtk/checkbox.c @ 10:1496aae2e7d4

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- simplified build by including dependences in the source tree - added make dep tracking - added mingw cross-build rules - added readme & licence
author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 31 Jul 2023 18:58:56 +0300
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nuclear@10 1 #include <string.h>
nuclear@10 2 #include <assert.h>
nuclear@10 3 #include "imtk.h"
nuclear@10 4 #include "state.h"
nuclear@10 5 #include "draw.h"
nuclear@10 6
nuclear@10 7
nuclear@10 8 #define CHECKBOX_SIZE 14
nuclear@10 9
nuclear@10 10
nuclear@10 11 static void draw_checkbox(int id, const char *label, int x, int y, int state, int over);
nuclear@10 12
nuclear@10 13 int imtk_checkbox(int id, const char *label, int x, int y, int state)
nuclear@10 14 {
nuclear@10 15 int sz = CHECKBOX_SIZE;
nuclear@10 16 int full_size, over = 0;
nuclear@10 17
nuclear@10 18 assert(id >= 0);
nuclear@10 19
nuclear@10 20 if(x == IMTK_AUTO || y == IMTK_AUTO) {
nuclear@10 21 imtk_layout_get_pos(&x, &y);
nuclear@10 22 }
nuclear@10 23
nuclear@10 24 full_size = sz + imtk_string_size(label) + 5;
nuclear@10 25 if(imtk_hit_test(x, y, full_size, sz)) {
nuclear@10 26 imtk_set_hot(id);
nuclear@10 27 over = 1;
nuclear@10 28 }
nuclear@10 29
nuclear@10 30 if(imtk_button_state(IMTK_LEFT_BUTTON)) {
nuclear@10 31 if(over) {
nuclear@10 32 imtk_set_active(id);
nuclear@10 33 }
nuclear@10 34 } else { /* mouse button up */
nuclear@10 35 if(imtk_is_active(id)) {
nuclear@10 36 imtk_set_active(-1);
nuclear@10 37 if(imtk_is_hot(id) && over) {
nuclear@10 38 state = !state;
nuclear@10 39 }
nuclear@10 40 }
nuclear@10 41 }
nuclear@10 42
nuclear@10 43 draw_checkbox(id, label, x, y, state, over);
nuclear@10 44 imtk_layout_advance(full_size, sz);
nuclear@10 45 return state;
nuclear@10 46 }
nuclear@10 47
nuclear@10 48 static float v[][2] = {
nuclear@10 49 {-0.2, 0.63}, /* 0 */
nuclear@10 50 {0.121, 0.325}, /* 1 */
nuclear@10 51 {0.15, 0.5}, /* 2 */
nuclear@10 52 {0.28, 0.125}, /* 3 */
nuclear@10 53 {0.38, 0.33}, /* 4 */
nuclear@10 54 {0.42, -0.122}, /* 5 */
nuclear@10 55 {0.58, 0.25}, /* 6 */
nuclear@10 56 {0.72, 0.52}, /* 7 */
nuclear@10 57 {0.625, 0.65}, /* 8 */
nuclear@10 58 {0.89, 0.78}, /* 9 */
nuclear@10 59 {0.875, 0.92}, /* 10 */
nuclear@10 60 {1.13, 1.145} /* 11 */
nuclear@10 61 };
nuclear@10 62 #define TRI(a, b, c) (glVertex2fv(v[a]), glVertex2fv(v[b]), glVertex2fv(v[c]))
nuclear@10 63
nuclear@10 64 static void draw_checkbox(int id, const char *label, int x, int y, int state, int over)
nuclear@10 65 {
nuclear@10 66 static const int sz = CHECKBOX_SIZE;
nuclear@10 67 unsigned int attr = 0;
nuclear@10 68 float tcol[4], bcol[4];
nuclear@10 69
nuclear@10 70 if(over) {
nuclear@10 71 attr |= IMTK_FOCUS_BIT;
nuclear@10 72 }
nuclear@10 73 if(imtk_is_active(id)) {
nuclear@10 74 attr |= IMTK_PRESS_BIT;
nuclear@10 75 }
nuclear@10 76 memcpy(tcol, imtk_get_color(IMTK_BOTTOM_COLOR | attr), sizeof tcol);
nuclear@10 77 memcpy(bcol, imtk_get_color(IMTK_TOP_COLOR | attr), sizeof bcol);
nuclear@10 78
nuclear@10 79 imtk_draw_rect(x, y, sz, sz, tcol, bcol);
nuclear@10 80 imtk_draw_frame(x, y, sz, sz, FRAME_INSET);
nuclear@10 81
nuclear@10 82 glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
nuclear@10 83 if(state) {
nuclear@10 84 glMatrixMode(GL_MODELVIEW);
nuclear@10 85 glPushMatrix();
nuclear@10 86 glTranslatef(x, y + sz, 0);
nuclear@10 87 glScalef(sz * 1.2, -sz * 1.3, 1);
nuclear@10 88
nuclear@10 89 glBegin(GL_TRIANGLES);
nuclear@10 90 glColor4fv(imtk_get_color(IMTK_CHECK_COLOR));
nuclear@10 91 TRI(0, 1, 2);
nuclear@10 92 TRI(1, 3, 2);
nuclear@10 93 TRI(3, 4, 2);
nuclear@10 94 TRI(3, 5, 4);
nuclear@10 95 TRI(4, 5, 6);
nuclear@10 96 TRI(4, 6, 7);
nuclear@10 97 TRI(4, 7, 8);
nuclear@10 98 TRI(8, 7, 9);
nuclear@10 99 TRI(8, 9, 10);
nuclear@10 100 TRI(10, 9, 11);
nuclear@10 101 glEnd();
nuclear@10 102
nuclear@10 103 glPopMatrix();
nuclear@10 104 }
nuclear@10 105
nuclear@10 106 glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
nuclear@10 107 imtk_draw_string(x + sz + 5, y + sz - 2, label);
nuclear@10 108 }
nuclear@10 109