From 1cb268f2e7bcf406828cb00dbf3a2f363b219274 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Sat, 29 Dec 2018 12:55:03 +0100
Subject: [PATCH] exposable: define an 'on_mouse' interface function

---
 particle.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/particle.h b/particle.h
index 232fef7..b2211f6 100644
--- a/particle.h
+++ b/particle.h
@@ -20,6 +20,10 @@ struct particle {
                                      const struct tag_set *tags);
 };
 
+enum mouse_event {
+    ON_MOUSE_MOTION,
+    ON_MOUSE_CLICK,
+};
 
 struct exposable {
     const struct particle *particle;
@@ -31,6 +35,9 @@ struct exposable {
     int (*begin_expose)(struct exposable *exposable, cairo_t *cr);
     void (*expose)(const struct exposable *exposable, cairo_t *cr,
                    int x, int y, int height);
+
+    void (*on_mouse)(struct exposable *exposable, struct bar *bar,
+                     enum mouse_event event, int x, int y);
 };
 
 struct particle *particle_common_new(int left_margin, int right_margin);