imtk

annotate src/button.c @ 14:df2bc9406561

find changesets by author, revision, files, or words in the commit message
added gradients
author John Tsiombikas <nuclear@siggraph.org>
date Tue, 19 Apr 2011 03:01:46 +0300
parents 10604ff95527
children c7a7ddbe7714
rev   line source
nuclear@14 1 #include <string.h>
nuclear@6 2 #include <assert.h>
nuclear@6 3 #include "imtk.h"
nuclear@6 4 #include "state.h"
nuclear@6 5 #include "draw.h"
nuclear@6 6
nuclear@6 7 static void calc_button_size(const char *label, int *wret, int *hret);
nuclear@14 8 static void draw_button(int id, const char *label, int x, int y, int over);
nuclear@6 9
nuclear@6 10 int imtk_button(int id, const char *label, int x, int y)
nuclear@6 11 {
nuclear@6 12 int w, h, res = 0;
nuclear@6 13 int over = 0;
nuclear@6 14
nuclear@6 15 assert(id >= 0);
nuclear@6 16
nuclear@6 17 calc_button_size(label, &w, &h);
nuclear@6 18
nuclear@6 19 if(imtk_hit_test(x, y, w, h)) {
nuclear@6 20 imtk_set_hot(id);
nuclear@6 21 over = 1;
nuclear@6 22 }
nuclear@6 23
nuclear@6 24 if(imtk_button_state(IMTK_LEFT_BUTTON)) {
nuclear@6 25 if(over) {
nuclear@6 26 imtk_set_active(id);
nuclear@6 27 }
nuclear@6 28 } else { /* mouse button up */
nuclear@6 29 if(imtk_is_active(id)) {
nuclear@6 30 imtk_set_active(-1);
nuclear@6 31 if(imtk_is_hot(id) && over) {
nuclear@6 32 res = 1;
nuclear@6 33 }
nuclear@6 34 }
nuclear@6 35 }
nuclear@6 36
nuclear@14 37 draw_button(id, label, x, y, over);
nuclear@6 38 return res;
nuclear@6 39 }
nuclear@6 40
nuclear@14 41 static void draw_button(int id, const char *label, int x, int y, int over)
nuclear@6 42 {
nuclear@14 43 float tcol[4], bcol[4];
nuclear@14 44 int width, height, active = imtk_is_active(id);
nuclear@14 45 unsigned int attr = 0;
nuclear@14 46
nuclear@14 47 if(over) attr |= IMTK_FOCUS_BIT;
nuclear@14 48 if(active) attr |= IMTK_PRESS_BIT;
nuclear@6 49
nuclear@6 50 calc_button_size(label, &width, &height);
nuclear@6 51
nuclear@14 52 memcpy(tcol, imtk_get_color(IMTK_TOP_COLOR | attr), sizeof tcol);
nuclear@14 53 memcpy(bcol, imtk_get_color(IMTK_BOTTOM_COLOR | attr), sizeof bcol);
nuclear@6 54
nuclear@14 55 imtk_draw_rect(x, y, width, height, tcol, bcol);
nuclear@14 56 imtk_draw_frame(x, y, width, height, active ? FRAME_INSET : FRAME_OUTSET);
nuclear@6 57
nuclear@6 58 glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
nuclear@6 59 imtk_draw_string(x + 20, y + 15, label);
nuclear@6 60 }
nuclear@6 61
nuclear@6 62 static void calc_button_size(const char *label, int *wret, int *hret)
nuclear@6 63 {
nuclear@6 64 int strsz = imtk_string_size(label);
nuclear@6 65 if(wret) *wret = strsz + 40;
nuclear@6 66 if(hret) *hret = 20;
nuclear@6 67 }