From 07646612acbc833ec50479eee3564af37636f272 Mon Sep 17 00:00:00 2001
From: Federico Angelilli <code@fedang.net>
Date: Sun, 19 Nov 2023 01:32:37 +0100
Subject: Check button clicks and trigger actions

---
 src/connect.c | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 71 insertions(+), 3 deletions(-)

(limited to 'src/connect.c')

diff --git a/src/connect.c b/src/connect.c
index 9272a5c..bc45812 100644
--- a/src/connect.c
+++ b/src/connect.c
@@ -48,6 +48,62 @@ static void update_scale(Connection *con)
     }
 }
 
+static inline bool in_rect(int px, int py, int x, int y, int w, int h)
+{
+    return px >= x && px <= x + w && py >= y && py <= y + h;
+}
+
+static inline bool in_circle(int px, int py, int x, int y, int r)
+{
+    int dx = x - px;
+    int dy = y - py;
+    return (dx * dx + dy * dy) <= r * r;
+}
+
+static inline bool in_capsule(int px, int py, int x, int y, int w, int h)
+{
+    g_assert(w >= h);
+    int radius = h / 2;
+
+    // Circle case
+    if (w == h) return in_circle(px, py, x + radius, y + radius, radius);
+
+    // Capsule case
+    return in_circle(px, py, x + radius, y + radius, radius)
+        || in_circle(px, py, x + w - radius, y + radius, radius)
+        || in_rect(px, py, x + radius, y, w - 2 * radius, h);
+}
+
+static void button_action(State *state, xcb_button_release_event_t *button)
+{
+    log_debug("Button release event [x=%d, y=%d]", button->event_x, button->event_y);
+
+    for (GList *it = state->draw->layouts; it != NULL; it = it->next) {
+        Layout *layout = it->data;
+
+        // Skip
+        if (layout->x + layout->width < button->event_x) continue;
+        if (layout->x > button->event_x) break;
+
+        bool check = in_capsule(button->event_x, button->event_y,
+                                layout->x, layout->y,
+                                layout->width, layout->height);
+
+        log_debug("Button layout [x=%d, y=%d, w=%d, h=%d]",
+                  layout->x, layout->y, layout->width, layout->height);
+
+        if (check) {
+            log_debug("Triggering action for button");
+            if (layout->btn->action != NULL) {
+                layout->btn->action(layout->btn);
+            }
+            return;
+        }
+    }
+
+    log_debug("Ignoring button release");
+}
+
 typedef struct {
     GSource source;
     Connection *con;
@@ -115,9 +171,21 @@ static gboolean source_dispatch(GSource *source, GSourceFunc callback, gpointer
             }
 
             case XCB_BUTTON_RELEASE: {
-                log_debug("Mouse event");
-
-                // TODO: Handle click generically by translating the button code
+                xcb_button_release_event_t *button = (xcb_button_release_event_t *)xsource->event;
+                log_debug("Processing event 'ButtonRelease' [type=%d]", XCB_BUTTON_RELEASE);
+
+                // TODO: Handle different actions properly
+                switch (button->detail) {
+                    case XCB_BUTTON_INDEX_2: // left click
+                    case XCB_BUTTON_INDEX_1: // right click
+                    case XCB_BUTTON_INDEX_3: // middle click
+                        button_action(xsource->con->state, button);
+                        break;
+
+                    default:
+                        log_debug("Ignoring button release [button=%d]", button->detail);
+                        break;
+                }
                 break;
             }
 
-- 
cgit v1.2.3