From c51ea686211295bd9ab3d830b738fe74af1a86c6 Mon Sep 17 00:00:00 2001
From: Dmytro Poplavskiy <dmytro.poplavskiy@gmail.com>
Date: Sun, 20 Oct 2013 15:43:38 +1000
Subject: [PATCH] Reload PFD qml widget on the middle mouse click

Makes qml files modifications and result check much faster
---
 .../src/plugins/pfdqml/pfdqmlgadgetwidget.cpp       | 13 +++++++++++++
 .../src/plugins/pfdqml/pfdqmlgadgetwidget.h         |  3 +++
 2 files changed, 16 insertions(+)

diff --git a/ground/openpilotgcs/src/plugins/pfdqml/pfdqmlgadgetwidget.cpp b/ground/openpilotgcs/src/plugins/pfdqml/pfdqmlgadgetwidget.cpp
index aa6879b7e..b6f74962c 100644
--- a/ground/openpilotgcs/src/plugins/pfdqml/pfdqmlgadgetwidget.cpp
+++ b/ground/openpilotgcs/src/plugins/pfdqml/pfdqmlgadgetwidget.cpp
@@ -27,6 +27,7 @@
 #include <QtOpenGL/QGLWidget>
 #include <QtCore/qfileinfo.h>
 #include <QtCore/qdir.h>
+#include <QMouseEvent>
 
 #include <QtDeclarative/qdeclarativeengine.h>
 #include <QtDeclarative/qdeclarativecontext.h>
@@ -94,6 +95,8 @@ void PfdQmlGadgetWidget::setQmlFile(QString fn)
     SvgImageProvider *svgProvider = new SvgImageProvider(fn);
     engine()->addImageProvider("svg", svgProvider);
 
+    engine()->clearComponentCache();
+
     // it's necessary to allow qml side to query svg element position
     engine()->rootContext()->setContextProperty("svgRenderer", svgProvider);
     engine()->setBaseUrl(QUrl::fromLocalFile(fn));
@@ -184,6 +187,16 @@ void PfdQmlGadgetWidget::setActualPositionUsed(bool arg)
     }
 }
 
+void PfdQmlGadgetWidget::mouseReleaseEvent(QMouseEvent *event)
+{
+    // Reload the schene on the middle mouse button click.
+    if (event->button() == Qt::MiddleButton) {
+        setQmlFile(m_qmlFileName);
+    }
+
+    QDeclarativeView::mouseReleaseEvent(event);
+}
+
 void PfdQmlGadgetWidget::setLatitude(double arg)
 {
     // not sure qFuzzyCompare is accurate enough for geo coordinates
diff --git a/ground/openpilotgcs/src/plugins/pfdqml/pfdqmlgadgetwidget.h b/ground/openpilotgcs/src/plugins/pfdqml/pfdqmlgadgetwidget.h
index 46d540345..42b21edee 100644
--- a/ground/openpilotgcs/src/plugins/pfdqml/pfdqmlgadgetwidget.h
+++ b/ground/openpilotgcs/src/plugins/pfdqml/pfdqmlgadgetwidget.h
@@ -115,6 +115,9 @@ signals:
     void altitudeUnitChanged(QString arg);
     void altitudeFactorChanged(double arg);
 
+protected:
+    void mouseReleaseEvent(QMouseEvent *event);
+
 private:
     QString m_qmlFileName;
     QString m_earthFile;