- added libdrawtext

[demo_prior] / src / imtk / state.c

diff --git a/src/imtk/state.c b/src/imtk/state.c
new file mode 100644 (file)
index 0000000..f177f4d
--- /dev/null
+++ b/src/imtk/state.c
@@ -0,0 +1,154 @@
+#include "state.h"
+#include "imtk.h"
+
+struct key_node {
+       int key;
+       struct key_node *next;
+};
+
+
+struct imtk_state st = {
+       1, 1,                   /* scr_width/scr_height */
+       0, 0, 0, 0, 0,  /* mousex/mousey, prevx, prevy, mouse_bnmask */
+       -1, -1, -1, -1  /* active, hot, input, prev_active */
+};
+
+static struct key_node *key_list, *key_tail;
+
+
+
+void imtk_inp_key(int key, int state)
+{
+       if(state == IMTK_DOWN) {
+               struct key_node *node;
+
+               if(!(node = malloc(sizeof *node))) {
+                       return;
+               }
+               node->key = key;
+               node->next = 0;
+
+               if(key_list) {
+                       key_tail->next = node;
+                       key_tail = node;
+               } else {
+                       key_list = key_tail = node;
+               }
+       }
+
+       imtk_post_redisplay();
+}
+
+void imtk_inp_mouse(int bn, int state)
+{
+       if(state == IMTK_DOWN) {
+               st.mouse_bnmask |= 1 << bn;
+       } else {
+               st.mouse_bnmask &= ~(1 << bn);
+       }
+       imtk_post_redisplay();
+}
+
+void imtk_inp_motion(int x, int y)
+{
+       st.mousex = x;
+       st.mousey = y;
+
+       imtk_post_redisplay();
+}
+
+void imtk_set_viewport(int x, int y)
+{
+       st.scr_width = x;
+       st.scr_height = y;
+}
+
+void imtk_get_viewport(int *width, int *height)
+{
+       if(width) *width = st.scr_width;
+       if(height) *height = st.scr_height;
+}
+
+
+void imtk_set_active(int id)
+{
+       if(id == -1 || st.hot == id) {
+               st.prev_active = st.active;
+               st.active = id;
+       }
+}
+
+int imtk_is_active(int id)
+{
+       return st.active == id;
+}
+
+int imtk_set_hot(int id)
+{
+       if(st.active == -1) {
+               st.hot = id;
+               return 1;
+       }
+       return 0;
+}
+
+int imtk_is_hot(int id)
+{
+       return st.hot == id;
+}
+
+void imtk_set_focus(int id)
+{
+       st.input = id;
+}
+
+int imtk_has_focus(int id)
+{
+       return st.input == id;
+}
+
+int imtk_hit_test(int x, int y, int w, int h)
+{
+       return st.mousex >= x && st.mousex < (x + w) &&
+               st.mousey >= y && st.mousey < (y + h);
+}
+
+void imtk_get_mouse(int *xptr, int *yptr)
+{
+       if(xptr) *xptr = st.mousex;
+       if(yptr) *yptr = st.mousey;
+}
+
+void imtk_set_prev_mouse(int x, int y)
+{
+       st.prevx = x;
+       st.prevy = y;
+}
+
+void imtk_get_prev_mouse(int *xptr, int *yptr)
+{
+       if(xptr) *xptr = st.prevx;
+       if(yptr) *yptr = st.prevy;
+}
+
+int imtk_button_state(int bn)
+{
+       return st.mouse_bnmask & (1 << bn);
+}
+
+
+int imtk_get_key(void)
+{
+       int key = -1;
+       struct key_node *node = key_list;
+
+       if(node) {
+               key = node->key;
+               key_list = node->next;
+               if(!key_list) {
+                       key_tail = 0;
+               }
+               free(node);
+       }
+       return key;
+}