Qt: Move some functionalty from OpenGLDisplayWindow into QtDisplayWindow

src/duckstation-qt/qtdisplaywindow.cpp

@@ -0,0 +1,65 @@
+#include "qtdisplaywindow.h"
+#include "imgui.h"
+#include "qthostinterface.h"
+#include <QtGui/QKeyEvent>
+
+QtDisplayWindow::QtDisplayWindow(QtHostInterface* host_interface, QWindow* parent)
+  : QWindow(parent), m_host_interface(host_interface)
+{
+}
+
+QtDisplayWindow::~QtDisplayWindow() = default;
+
+HostDisplay* QtDisplayWindow::getHostDisplayInterface()
+{
+  return nullptr;
+}
+
+bool QtDisplayWindow::createDeviceContext(QThread* worker_thread)
+{
+  return true;
+}
+
+bool QtDisplayWindow::initializeDeviceContext()
+{
+  if (!createImGuiContext() || !createDeviceResources())
+    return false;
+
+  return true;
+}
+
+void QtDisplayWindow::destroyDeviceContext()
+{
+  destroyImGuiContext();
+  destroyDeviceResources();
+}
+
+bool QtDisplayWindow::createImGuiContext()
+{
+  ImGui::CreateContext();
+  return true;
+}
+
+void QtDisplayWindow::destroyImGuiContext()
+{
+  ImGui::DestroyContext();
+}
+
+bool QtDisplayWindow::createDeviceResources()
+{
+  return true;
+}
+
+void QtDisplayWindow::destroyDeviceResources() {}
+
+void QtDisplayWindow::Render() {}
+
+void QtDisplayWindow::keyPressEvent(QKeyEvent* event)
+{
+  m_host_interface->handleKeyEvent(event->key(), true);
+}
+
+void QtDisplayWindow::keyReleaseEvent(QKeyEvent* event)
+{
+  m_host_interface->handleKeyEvent(event->key(), false);
+}