- added libdrawtext

[demo_prior] / src / imtk / checkbox.c

diff --git a/src/imtk/checkbox.c b/src/imtk/checkbox.c
new file mode 100644 (file)
index 0000000..6efd0a3
--- /dev/null
+++ b/src/imtk/checkbox.c
@@ -0,0 +1,109 @@
+#include <string.h>
+#include <assert.h>
+#include "imtk.h"
+#include "state.h"
+#include "draw.h"
+
+
+#define CHECKBOX_SIZE  14
+
+
+static void draw_checkbox(int id, const char *label, int x, int y, int state, int over);
+
+int imtk_checkbox(int id, const char *label, int x, int y, int state)
+{
+       int sz = CHECKBOX_SIZE;
+       int full_size, over = 0;
+
+       assert(id >= 0);
+
+       if(x == IMTK_AUTO || y == IMTK_AUTO) {
+               imtk_layout_get_pos(&x, &y);
+       }
+
+       full_size = sz + imtk_string_size(label) + 5;
+       if(imtk_hit_test(x, y, full_size, sz)) {
+               imtk_set_hot(id);
+               over = 1;
+       }
+
+       if(imtk_button_state(IMTK_LEFT_BUTTON)) {
+               if(over) {
+                       imtk_set_active(id);
+               }
+       } else { /* mouse button up */
+               if(imtk_is_active(id)) {
+                       imtk_set_active(-1);
+                       if(imtk_is_hot(id) && over) {
+                               state = !state;
+                       }
+               }
+       }
+
+       draw_checkbox(id, label, x, y, state, over);
+       imtk_layout_advance(full_size, sz);
+       return state;
+}
+
+static float v[][2] = {
+       {-0.2, 0.63},   /* 0 */
+       {0.121, 0.325}, /* 1 */
+       {0.15, 0.5},    /* 2 */
+       {0.28, 0.125},  /* 3 */
+       {0.38, 0.33},   /* 4 */
+       {0.42, -0.122}, /* 5 */
+       {0.58, 0.25},   /* 6 */
+       {0.72, 0.52},   /* 7 */
+       {0.625, 0.65},  /* 8 */
+       {0.89, 0.78},   /* 9 */
+       {0.875, 0.92},  /* 10 */
+       {1.13, 1.145}   /* 11 */
+};
+#define TRI(a, b, c)   (glVertex2fv(v[a]), glVertex2fv(v[b]), glVertex2fv(v[c]))
+
+static void draw_checkbox(int id, const char *label, int x, int y, int state, int over)
+{
+       static const int sz = CHECKBOX_SIZE;
+       unsigned int attr = 0;
+       float tcol[4], bcol[4];
+
+       if(over) {
+               attr |= IMTK_FOCUS_BIT;
+       }
+       if(imtk_is_active(id)) {
+               attr |= IMTK_PRESS_BIT;
+       }
+       memcpy(tcol, imtk_get_color(IMTK_BOTTOM_COLOR | attr), sizeof tcol);
+       memcpy(bcol, imtk_get_color(IMTK_TOP_COLOR | attr), sizeof bcol);
+
+       imtk_draw_rect(x, y, sz, sz, tcol, bcol);
+       imtk_draw_frame(x, y, sz, sz, FRAME_INSET);
+
+       glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
+       if(state) {
+               glMatrixMode(GL_MODELVIEW);
+               glPushMatrix();
+               glTranslatef(x, y + sz, 0);
+               glScalef(sz * 1.2, -sz * 1.3, 1);
+
+               glBegin(GL_TRIANGLES);
+               glColor4fv(imtk_get_color(IMTK_CHECK_COLOR));
+               TRI(0, 1, 2);
+               TRI(1, 3, 2);
+               TRI(3, 4, 2);
+               TRI(3, 5, 4);
+               TRI(4, 5, 6);
+               TRI(4, 6, 7);
+               TRI(4, 7, 8);
+               TRI(8, 7, 9);
+               TRI(8, 9, 10);
+               TRI(10, 9, 11);
+               glEnd();
+
+               glPopMatrix();
+       }
+
+       glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
+       imtk_draw_string(x + sz + 5, y + sz - 2, label);
+}
+