Added setMouseButtonCallback

src/main.zig

@@ -132,6 +132,11 @@ fn handleResize(win: mfb.Window(State), width: i32, height: i32) callconv(.C) vo
     }
 }
 
+fn handleMouseButton(_: mfb.Window(State), mouse_button: mfb.MouseButton, key_mod: mfb.KeyMod, is_pressed: bool) callconv(.C) void {
+    const up_down: []const u8 = if (is_pressed) "down" else "up";
+    std.log.info("{any} mouse{d} {s}", .{ key_mod, @enumToInt(mouse_button), up_down });
+}
+
 pub fn main() !void {
     var gp_allocator = std.heap.GeneralPurposeAllocator(.{}){};
     const alloc = gp_allocator.allocator();
@@ -141,12 +146,13 @@ pub fn main() !void {
 
     var win = mfb.Window(State).open("Hello minifb-zig", Width, Height, .{ .resizable = true, .alwaysOnTop = true }) catch unreachable;
     const scale = win.getMonitorScale();
-    std.log.info("Monitor scale: {d} * {d}", .{scale.x, scale.y});
+    std.log.info("Monitor scale: {d} * {d}", .{ scale.x, scale.y });
     mfb.setTargetFPS(30);
     win.setUserData(&state);
 
     win.setActiveCallback(handleActive);
     win.setResizeCallback(handleResize);
+    win.setMouseButtonCallback(handleMouseButton);
 
     var buf = try Buffer.init(alloc, Width, Height);
     defer buf.deinit();