From ea1c1281ef38cdc797dc63a62d7bb349253f8344 Mon Sep 17 00:00:00 2001
From: Brandon Dyck <brandon@dyck.us>
Date: Sun, 9 Jan 2022 23:44:57 -0700
Subject: [PATCH] Added setMouseButtonCallback

---
 lib/minifb/src/minifb.zig | 48 +++++++++++++++++++++++++++++++++++++++
 src/main.zig              |  8 ++++++-
 2 files changed, 55 insertions(+), 1 deletion(-)

diff --git a/lib/minifb/src/minifb.zig b/lib/minifb/src/minifb.zig
index 4d60f5c..97f743f 100644
--- a/lib/minifb/src/minifb.zig
+++ b/lib/minifb/src/minifb.zig
@@ -21,6 +21,49 @@ pub const KeyMod = packed struct {
     capsLock: bool = false,
     numLock: bool = false,
     _reserved: u26 = 0,
+
+    fn putName(present: bool, name: []const u8, names: *[6][]const u8, index: *usize) void {
+        if (present) {
+            names.*[index.*] = name;
+            index.* += 1;
+        }
+    }
+
+    pub fn format(self: KeyMod, comptime fmt: []const u8, _: std.fmt.FormatOptions, writer: anytype) !void {
+        var names: [6][]const u8 = undefined;
+        var i: usize = 0;
+
+        if (fmt.len > 0) {
+            @compileError("Unknown format character: '" ++ fmt ++ "'");
+        }
+
+        putName(self.shift, "Shift", &names, &i);
+        putName(self.control, "Control", &names, &i);
+        putName(self.alt, "Alt", &names, &i);
+        putName(self.super, "Super", &names, &i);
+        putName(self.capsLock, "Caps_Lock", &names, &i);
+        putName(self.numLock, "Num_Lock", &names, &i);
+        var first = true;
+        for (names[0..i]) |name| {
+            if (!first) {
+                _ = try writer.write("+");
+            }
+            _ = try writer.write(name);
+            first = false;
+        }
+    }
+};
+
+pub const MouseButton = enum(c_int) {
+    @"0" = c.MOUSE_BTN_0,
+    @"1" = c.MOUSE_BTN_1,
+    @"2" = c.MOUSE_BTN_2,
+    @"3" = c.MOUSE_BTN_3,
+    @"4" = c.MOUSE_BTN_4,
+    @"5" = c.MOUSE_BTN_5,
+    @"6" = c.MOUSE_BTN_6,
+    @"7" = c.MOUSE_BTN_7,
+    _,
 };
 
 pub fn Window(comptime TUserData: type) type {
@@ -95,6 +138,11 @@ pub fn Window(comptime TUserData: type) type {
             c.mfb_set_resize_callback(self.cwin, @ptrCast(c.mfb_resize_func, callback));
         }
 
+        pub const MouseButtonFunc = fn (win: Window(TUserData), mouse_button: MouseButton, key_mod: KeyMod, is_pressed: bool) callconv(.C) void;
+        pub fn setMouseButtonCallback(self: Window(TUserData), callback: MouseButtonFunc) void {
+            c.mfb_set_mouse_button_callback(self.cwin, @ptrCast(c.mfb_mouse_button_func, callback));
+        }
+
         pub fn setViewport(self: Window(TUserData), offset_x: u32, offset_y: u32, width: u32, height: u32) bool {
             return c.mfb_set_viewport(self.cwin, offset_x, offset_y, width, height);
         }
diff --git a/src/main.zig b/src/main.zig
index 91c6ecc..a5a015f 100644
--- a/src/main.zig
+++ b/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();