rename mainwindow to MainWindow

qrenderdoc/MainWindow.cpp

@@ -0,0 +1,14 @@
+#include "MainWindow.h"
+#include "ui_MainWindow.h"
+
+MainWindow::MainWindow(QWidget *parent) :
+    QMainWindow(parent),
+    ui(new Ui::MainWindow)
+{
+    ui->setupUi(this);
+}
+
+MainWindow::~MainWindow()
+{
+    delete ui;
+}