From 9ec0c1c2741a39d38692ffeb0dfcbc88e874dbdf Mon Sep 17 00:00:00 2001
From: Carl Worth <cworth@cworth.org>
Date: Sat, 23 Feb 2008 23:05:29 -0800
Subject: [PATCH] Make the game playable by clicking

Works nicely on a single computer now. Still not yet networked.
---
 loa.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)

diff --git a/loa.c b/loa.c
index 3333fc3..5716a36 100644
--- a/loa.c
+++ b/loa.c
@@ -35,6 +35,9 @@ typedef struct {
 typedef struct {
     layout_t layout;
     loa_board_t board;
+    loa_bool_t has_selected;
+    int selected_x;
+    int selected_y;
 } loa_game_t;
 
 static gboolean
@@ -54,6 +57,56 @@ on_delete_event_quit (GtkWidget  *widget,
 /* Something like mahogany */
 #define DARK_SQUARE_COLOR  0.26, 0.02, 0.01
 
+static gboolean
+on_button_press_event (GtkWidget	*widget,
+		       GdkEventButton	*event,
+		       gpointer		 user_data)
+{
+    loa_game_t *game = user_data;
+    layout_t *layout = &game->layout;
+    int x, y;
+    char *error;
+
+    x = (event->x - layout->x_offset) / layout->cell_size;
+    y = (event->y - layout->y_offset) / layout->cell_size;
+
+    if (! game->has_selected) {
+	if (game->board.cells[x][y] == game->board.player) {
+	    game->has_selected = TRUE;
+	    game->selected_x = x;
+	    game->selected_y = y;
+	    gtk_widget_queue_draw (widget);
+	}
+	return TRUE;
+    }
+
+    if (x == game->selected_x &&
+	y == game->selected_y)
+    {
+	game->has_selected = FALSE;
+	gtk_widget_queue_draw (widget);
+	return TRUE;
+    }
+	
+    if (loa_board_move (&game->board,
+			game->selected_x, game->selected_y,
+			x, y, &error))
+    {
+	game->has_selected = FALSE;
+	gtk_widget_queue_draw (widget);
+	return TRUE;
+    } else {
+	printf ("Illegal move %c%d%c%d: %s\n",
+		'a' + game->selected_x,
+		LOA_BOARD_SIZE - game->selected_y,
+		'a' + x,
+		LOA_BOARD_SIZE - y,
+		error);
+    }
+
+    return TRUE;
+}
+
 static gboolean
 on_expose_event_draw (GtkWidget		*widget,
 		      GdkEventExpose	*event,
@@ -114,6 +167,17 @@ on_expose_event_draw (GtkWidget		*widget,
 		    cairo_set_source_rgb (cr, DARK_SQUARE_COLOR);
 		cairo_stroke (cr);
 	    }
+	    if (game->has_selected &&
+		x == game->selected_x &&
+		y == game->selected_y)
+	    {
+		cairo_arc (cr,
+			   layout->cell_size / 2.0, layout->cell_size / 2.0,
+			   layout->cell_size / 2.5,
+			   0, 2 * M_PI);
+		cairo_set_source_rgba (cr, 0.2, 0.2, 1.0, 0.4);
+		cairo_fill (cr);
+	    }
 	    cairo_restore (cr);
 	}
     }
@@ -129,6 +193,8 @@ loa_game_init (loa_game_t *game)
     game->layout.width = 0;
     game->layout.height = 0;
 
+    game->has_selected = FALSE;
+
     loa_board_init (&game->board);
 }
 
@@ -157,6 +223,10 @@ main (int argc, char *argv[])
     g_signal_connect (drawing_area, "expose-event",  
 		      G_CALLBACK (on_expose_event_draw), &game);
 
+    gtk_widget_add_events (drawing_area, GDK_BUTTON_PRESS_MASK);
+    g_signal_connect (drawing_area, "button-press-event",
+		      G_CALLBACK (on_button_press_event), &game);
+
     gtk_widget_show_all (window);
     
     gtk_main ();
-- 
2.43.0