added simple keyboard control

src/KeyboardController.cpp

@@ -0,0 +1,51 @@
+
+#include "KeyboardController.h"
+
+#include <iostream>
+
+KeyboardController::KeyboardController(NoteQueue& queue) : queue_(queue) {
+
+    // TODO: also configurable via a yml
+    keymap_ = {
+        { Qt::Key_Z, 60-12 }, // C
+        { Qt::Key_S, 61-12 }, // C#
+        { Qt::Key_X, 62-12 }, // D
+        { Qt::Key_D, 63-12 }, // D#
+        { Qt::Key_C, 64-12 }, // E
+        { Qt::Key_V, 65-12 }, // F
+        { Qt::Key_G, 66-12 }, // F#
+        { Qt::Key_B, 67-12 }, // G
+        { Qt::Key_H, 68-12 }, // G#
+        { Qt::Key_N, 69-12 }, // A
+        { Qt::Key_J, 70-12 }, // A#
+        { Qt::Key_M, 71-12 }, // B
+        { Qt::Key_Q, 72-12 }  // C (octave up)
+    };
+}
+
+void KeyboardController::handleKeyPress(QKeyEvent* e) {
+    if (e->isAutoRepeat()) return;
+
+    auto it = keymap_.find(e->key());
+    if (it == keymap_.end()) return;
+
+    queue_.push({
+        NoteEventType::NoteOn,
+        it->second,
+        0.8f
+    });
+}
+
+// TODO: something like a sustain pedal will suspend note-off events. probably control that in the midi controller
+void KeyboardController::handleKeyRelease(QKeyEvent* e) {
+    if (e->isAutoRepeat()) return;
+
+    auto it = keymap_.find(e->key());
+    if (it == keymap_.end()) return;
+
+    queue_.push({
+        NoteEventType::NoteOff,
+        it->second,
+        0.8f
+    });
+}