begin defining GUI events

src/gui/Gui-X.cc

@@ -53,7 +53,9 @@ bool Gui_Init()
             RootWindow(g_display, g_vi->screen), g_vi->visual, AllocNone);
     g_swa.colormap = colormap;
     g_swa.border_pixel = 0;
-    g_swa.event_mask = StructureNotifyMask;
+    g_swa.event_mask = StructureNotifyMask |
+        KeyPressMask | KeyReleaseMask |
+        ButtonPressMask | ButtonReleaseMask;
 
     return true;
 }

src/gui/Gui.h

@@ -3,11 +3,32 @@
 
 #include <stdint.h>
 
-#define GUI_EVENT_CLOSE_WINDOW 1u
+#define GUI_EVENT_CLOSE_WINDOW      1u
+#define GUI_EVENT_EXPOSE            2u
+#define GUI_EVENT_KEY_PRESS         3u
+#define GUI_EVENT_KEY_RELEASE       4u
+#define GUI_EVENT_BUTTON_PRESS      5u
+#define GUI_EVENT_BUTTON_RELEASE    6u
+
+typedef struct
+{
+    uint32_t key;
+    uint8_t mods;
+} Gui_KeyEvent;
+
+typedef struct
+{
+    uint8_t button;
+} Gui_ButtonEvent;
 
 typedef struct
 {
     uint8_t type;
+    union
+    {
+        Gui_KeyEvent key;
+        Gui_ButtonEvent button;
+    };
 } Gui_Event;
 
 bool Gui_Init();