feat: added blinking lights to sampler

.gitignore

@@ -0,0 +1,64 @@
+*.diff
+*.log
+*.o
+*.orig
+*.os
+*.patch
+!build/appveyor/NSIS.patch
+*.pyc
+*.rej
+*_build
+*~
+.#*
+
+dist32
+dist64
+
+src/mixxx.rc.include
+src/mixxx.res
+
+.sconf_temp
+.sconsign.branch
+.sconsign.dblite
+
+*.sqlite
+
+*.cfg
+!/res/keyboard/*.cfg
+
+cache
+
+lib/*/*.a
+lib/*/lib/*.a
+
+mixxx
+mixxx-test
+
+src/test/test_data
+src/test/golden_buffers/*.actual
+
+res/qrc_mixxx.cc
+res/developer_skins
+
+*.wixobj
+*.wixpdb
+*.msi
+*.mst
+*.cab
+build/wix/subdirs/*.wxs
+# The following 2 files are autogenerated by scons at release time
+# based on .tmpl template file for the second one.
+build/wix/bundle/bundleloc.wxs
+build/wix/ProductID.wxi
+
+*.obj
+*.pdb
+lib/*/*.lib
+lib/*/lib/*.lib
+
+lib/qtscript-bytearray/*.cc
+
+.idea
+*.vscode
+compile_commands.json
+

res/controllers/Pioneer-DDJ-400-script.js

@@ -554,6 +554,52 @@ PioneerDDJ400.vuMeterUpdate = function(value, group){
 
 };
 
+
+PioneerDDJ400.samplerModePadPressed = function(channel, control, value, status, group) {
+    if (value === 0) {
+        return; // ignore release
+    }
+
+    const isLoaded = engine.getValue(group, 'track_loaded') === 1;
+
+    if (!isLoaded) {
+        return;
+    }
+
+    engine.setValue(group, 'cue_gotoandplay', 1);
+
+    startSampleFlicker(status, control, group);
+};
+
+const TimersPioneerDDJ400 = {};
+
+function startSampleFlicker(channel, control, group) {
+    var val = 0x7f;
+
+    stopFlicker(channel, control);
+    TimersPioneerDDJ400[channel][control] = engine.beginTimer(250, function() {
+        val = 0x7f - val;
+
+        midi.sendShortMsg(channel, control, val);
+
+        const isPlaying = engine.getValue(group, 'play') === 1;
+
+        if (!isPlaying) {
+            stopFlicker(channel, control);
+            midi.sendShortMsg(channel, control, 0x7f);
+        }
+    });
+}
+
+function stopFlicker(channel, control) {
+    TimersPioneerDDJ400[channel] = TimersPioneerDDJ400[channel] || {};
+
+    if (TimersPioneerDDJ400[channel][control] !== undefined) {
+        engine.stopTimer(TimersPioneerDDJ400[channel][control]);
+        TimersPioneerDDJ400[channel][control] = undefined;
+    }
+}
+
 PioneerDDJ400.shutdown = function() {
     midi.sendShortMsg(0xB0, 0x02, 0); // reset vumeter
     midi.sendShortMsg(0xB1, 0x02, 0); // reset vumeter