- added libdrawtext

[demo_prior] / src / imtk / button.c

diff --git a/src/imtk/button.c b/src/imtk/button.c
new file mode 100644 (file)
index 0000000..f501a50
--- /dev/null
+++ b/src/imtk/button.c
@@ -0,0 +1,72 @@
+#include <string.h>
+#include <assert.h>
+#include "imtk.h"
+#include "state.h"
+#include "draw.h"
+
+static void calc_button_size(const char *label, int *wret, int *hret);
+static void draw_button(int id, const char *label, int x, int y, int over);
+
+int imtk_button(int id, const char *label, int x, int y)
+{
+       int w, h, res = 0;
+       int over = 0;
+
+       assert(id >= 0);
+
+       if(x == IMTK_AUTO || y == IMTK_AUTO) {
+               imtk_layout_get_pos(&x, &y);
+       }
+
+       calc_button_size(label, &w, &h);
+
+       if(imtk_hit_test(x, y, w, h)) {
+               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) {
+                               res = 1;
+                       }
+               }
+       }
+
+       draw_button(id, label, x, y, over);
+       imtk_layout_advance(w, h);
+       return res;
+}
+
+static void draw_button(int id, const char *label, int x, int y, int over)
+{
+       float tcol[4], bcol[4];
+       int width, height, active = imtk_is_active(id);
+       unsigned int attr = 0;
+
+       if(over) attr |= IMTK_FOCUS_BIT;
+       if(active) attr |= IMTK_PRESS_BIT;
+
+       calc_button_size(label, &width, &height);
+
+       memcpy(tcol, imtk_get_color(IMTK_TOP_COLOR | attr), sizeof tcol);
+       memcpy(bcol, imtk_get_color(IMTK_BOTTOM_COLOR | attr), sizeof bcol);
+
+       imtk_draw_rect(x, y, width, height, tcol, bcol);
+       imtk_draw_frame(x, y, width, height, active ? FRAME_INSET : FRAME_OUTSET);
+
+       glColor4fv(imtk_get_color(IMTK_TEXT_COLOR));
+       imtk_draw_string(x + 20, y + 15, label);
+}
+
+static void calc_button_size(const char *label, int *wret, int *hret)
+{
+       int strsz = imtk_string_size(label);
+       if(wret) *wret = strsz + 40;
+       if(hret) *hret = 20;
+}