Add window listener functions to allow spying on keys and mouse buttons

received by windows. Emit a 'closed' signal when a window is closed.
Allow windows to have no action buttons.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 576

1 files changed, 20 insertions, 0 deletions

diff --git a/textscreen/txt_window.h b/textscreen/txt_window.h
index 5e01a16d..a71307ae 100644
--- a/textscreen/txt_window.h
+++ b/textscreen/txt_window.h
@@ -31,6 +31,13 @@ typedef struct txt_window_s txt_window_t;
 #include "txt_table.h"
 #include "txt_window_action.h"
 
+// Callback function for window key presses
+
+typedef int (*TxtWindowKeyPress)(txt_window_t *window, int key, void *user_data);
+typedef int (*TxtWindowMousePress)(txt_window_t *window, 
+                                   int x, int y, int b, 
+                                   void *user_data);
+
 struct txt_window_s
 {
     // Base class: all windows are tables with one column.
@@ -51,6 +58,13 @@ struct txt_window_s
 
     txt_window_action_t *actions[3];
 
+    // Callback functions to invoke when keys/mouse buttons are pressed
+
+    TxtWindowKeyPress key_listener;
+    void *key_listener_data;
+    TxtWindowMousePress mouse_listener;
+    void *mouse_listener_data;
+
     // These are set automatically when the window is drawn
 
     int window_x, window_y;
@@ -65,6 +79,12 @@ void TXT_SetWindowPosition(txt_window_t *window,
                            int x, int y);
 void TXT_SetWindowAction(txt_window_t *window, txt_horiz_align_t position, 
                          txt_window_action_t *action);
+void TXT_SetKeyListener(txt_window_t *window, 
+                        TxtWindowKeyPress key_listener, 
+                        void *user_data);
+void TXT_SetMouseListener(txt_window_t *window, 
+                          TxtWindowMousePress mouse_listener,
+                          void *user_data);
 
 #endif /* #ifndef TXT_WINDOW_T */