From 1f4e15314c73516a03a7767dfc9a51f244446ac0 Mon Sep 17 00:00:00 2001
From: danteruiz <danteruiz102@gmail.com>
Date: Fri, 30 Aug 2019 08:48:25 -0700
Subject: [PATCH] enable dragging the window

---
 launchers/qt/src/LauncherWindow.cpp | 19 +++++++++++++------
 launchers/qt/src/LauncherWindow.h   |  6 +++++-
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/launchers/qt/src/LauncherWindow.cpp b/launchers/qt/src/LauncherWindow.cpp
index c647ac6e4e..b86c2ca84c 100644
--- a/launchers/qt/src/LauncherWindow.cpp
+++ b/launchers/qt/src/LauncherWindow.cpp
@@ -2,30 +2,37 @@
 
 #include <iostream>
 
+#include <QCursor>
+
 void LauncherWindow::keyPressEvent(QKeyEvent* event) {
     QQuickView::keyPressEvent(event);
     if (!event->isAccepted()) {
-        // std::cout << "Key press event\n";
     }
 }
 
 void LauncherWindow::mousePressEvent(QMouseEvent* event) {
     QQuickView::mousePressEvent(event);
     if (!event->isAccepted()) {
-        //std::cout << "mouse press event\n";
+        if (event->button() == Qt::LeftButton) {
+            _drag = true;
+            _previousMousePos = QCursor::pos();
+        }
     }
 }
 
 void LauncherWindow::mouseReleaseEvent(QMouseEvent* event) {
     QQuickView::mouseReleaseEvent(event);
-    if (!event->isAccepted()) {
-        //std::cout << "mouse release event\n";
-    }
+    _drag = false;
 }
 
 void LauncherWindow::mouseMoveEvent(QMouseEvent* event) {
     QQuickView::mouseMoveEvent(event);
     if (!event->isAccepted()) {
-        // std::cout << "mouse move event\n";
+        if (_drag) {
+            QPoint cursorPos = QCursor::pos();
+            QPoint offset = _previousMousePos - cursorPos;
+            _previousMousePos = cursorPos;
+            setPosition(position() - offset);
+        }
     }
 }
diff --git a/launchers/qt/src/LauncherWindow.h b/launchers/qt/src/LauncherWindow.h
index 903b0397dc..394d9aed41 100644
--- a/launchers/qt/src/LauncherWindow.h
+++ b/launchers/qt/src/LauncherWindow.h
@@ -1,5 +1,5 @@
 #include <QQuickView>
-
+#include <QPoint>
 
 class LauncherWindow : public QQuickView {
 public:
@@ -7,4 +7,8 @@ public:
     void mousePressEvent(QMouseEvent* event) override;
     void mouseReleaseEvent(QMouseEvent* event) override;
     void mouseMoveEvent(QMouseEvent* event) override;
+
+private:
+    bool _drag { false };
+    QPoint _previousMousePos;
 };