From 1cc3a4d625eab744839df08b0ada3eb21017bc48 Mon Sep 17 00:00:00 2001
From: Michael Lemaire <michael@thunderk.net>
Date: Fri, 26 Sep 2014 17:46:39 +0200
Subject: [PATCH] quick ui : Added basic camera controls

---
 .../modeler/quickapp/MainModelerWindow.h      |  1 +
 .../modeler/quickapp/ModelerCameras.cpp       | 13 ++++-
 .../modeler/quickapp/ModelerCameras.h         | 10 ++++
 src/interface/modeler/quickapp/OpenGLView.cpp | 50 +++++++++----------
 src/interface/modeler/quickapp/OpenGLView.h   |  8 ++-
 5 files changed, 55 insertions(+), 27 deletions(-)

diff --git a/src/interface/modeler/quickapp/MainModelerWindow.h b/src/interface/modeler/quickapp/MainModelerWindow.h
index 841d230..da676d9 100644
--- a/src/interface/modeler/quickapp/MainModelerWindow.h
+++ b/src/interface/modeler/quickapp/MainModelerWindow.h
@@ -19,6 +19,7 @@ public:
 
     inline Scenery *getScenery() const {return scenery;}
     inline OpenGLRenderer *getRenderer() const {return renderer;}
+    inline ModelerCameras *getCamera() const {return cameras;}
 
 protected:
     virtual void keyReleaseEvent(QKeyEvent *event) override;
diff --git a/src/interface/modeler/quickapp/ModelerCameras.cpp b/src/interface/modeler/quickapp/ModelerCameras.cpp
index 90ecc47..8e4104f 100644
--- a/src/interface/modeler/quickapp/ModelerCameras.cpp
+++ b/src/interface/modeler/quickapp/ModelerCameras.cpp
@@ -32,11 +32,22 @@ ModelerCameras::~ModelerCameras()
     delete topdown;
 }
 
+void ModelerCameras::processZoom(double value)
+{
+    active->strafeForward(value);
+}
+
+void ModelerCameras::processScroll(double xvalue, double yvalue)
+{
+    active->strafeRight(xvalue);
+    active->strafeUp(yvalue);
+}
+
 void ModelerCameras::timerEvent(QTimerEvent *)
 {
     OpenGLRenderer *renderer = parent->getRenderer();
 
-    current->transitionToAnother(active, 0.1);
+    current->transitionToAnother(active, 0.3);
     renderer->setCamera(current);
 }
 
diff --git a/src/interface/modeler/quickapp/ModelerCameras.h b/src/interface/modeler/quickapp/ModelerCameras.h
index dffaf81..5621203 100644
--- a/src/interface/modeler/quickapp/ModelerCameras.h
+++ b/src/interface/modeler/quickapp/ModelerCameras.h
@@ -19,6 +19,16 @@ public:
     ModelerCameras(MainModelerWindow *parent);
     ~ModelerCameras();
 
+    /**
+     * Process a zoom request.
+     */
+    void processZoom(double value);
+
+    /**
+     * Process a scroll request.
+     */
+    void processScroll(double xvalue, double yvalue);
+
 protected:
     void timerEvent(QTimerEvent *event);
 
diff --git a/src/interface/modeler/quickapp/OpenGLView.cpp b/src/interface/modeler/quickapp/OpenGLView.cpp
index 6d8c960..ad3a12b 100644
--- a/src/interface/modeler/quickapp/OpenGLView.cpp
+++ b/src/interface/modeler/quickapp/OpenGLView.cpp
@@ -3,9 +3,8 @@
 #include <QQuickWindow>
 #include <QHoverEvent>
 #include "MainModelerWindow.h"
-#include "CameraDefinition.h"
 #include "OpenGLRenderer.h"
-#include "Scenery.h"
+#include "ModelerCameras.h"
 
 OpenGLView::OpenGLView(QQuickItem *parent) :
     QQuickItem(parent)
@@ -15,8 +14,8 @@ OpenGLView::OpenGLView(QQuickItem *parent) :
     renderer = NULL;
 
     setAcceptedMouseButtons(Qt::AllButtons);
-    setAcceptHoverEvents(true);
-    setKeepMouseGrab(true);
+
+    mouse_button = Qt::NoButton;
 
     connect(this, SIGNAL(windowChanged(QQuickWindow*)), this, SLOT(handleWindowChanged(QQuickWindow*)));
     startTimer(50);
@@ -42,7 +41,7 @@ void OpenGLView::handleWindowChanged(QQuickWindow *win)
 
 void OpenGLView::paint()
 {
-    if (not initialized)
+    if (not initialized or not renderer)
     {
         renderer->initialize();
         initialized = true;
@@ -58,29 +57,30 @@ void OpenGLView::paint()
     }
 }
 
-void OpenGLView::hoverMoveEvent(QHoverEvent *event)
+void OpenGLView::wheelEvent(QWheelEvent *event)
 {
-    if (!renderer)
+    window->getCamera()->processZoom(0.1 * (double)event->angleDelta().y());
+}
+
+void OpenGLView::mousePressEvent(QMouseEvent *event)
+{
+    mouse_button = event->button();
+    mouse_pos = event->windowPos();
+}
+
+void OpenGLView::mouseReleaseEvent(QMouseEvent *)
+{
+    mouse_button = Qt::NoButton;
+}
+
+void OpenGLView::mouseMoveEvent(QMouseEvent *event)
+{
+    QPointF diff = event->windowPos() - mouse_pos;
+    if (mouse_button == Qt::MidButton)
     {
-        return;
+        window->getCamera()->processScroll(-0.1 * diff.x(), 0.1 * diff.y());
     }
-
-    /*CameraDefinition camera;
-    renderer->getScenery()->getCamera(&camera);
-
-    QPointF diff = event->posF() - event->oldPosF();
-    camera.strafeRight(diff.x() * 0.1);
-    camera.strafeUp(diff.y() * 0.1);
-    camera.validate();
-
-    camera.copy(renderer->render_camera);
-    renderer->getScenery()->setCamera(&camera);
-    renderer->getScenery()->getCamera(&camera);
-    renderer->cameraChangeEvent(&camera);
-    if (window)
-    {
-        window->update();
-    }*/
+    mouse_pos = event->windowPos();
 }
 
 void OpenGLView::timerEvent(QTimerEvent *)
diff --git a/src/interface/modeler/quickapp/OpenGLView.h b/src/interface/modeler/quickapp/OpenGLView.h
index e59c379..31fcc5c 100644
--- a/src/interface/modeler/quickapp/OpenGLView.h
+++ b/src/interface/modeler/quickapp/OpenGLView.h
@@ -19,13 +19,19 @@ public slots:
     void paint();
 
 protected:
-    virtual void hoverMoveEvent(QHoverEvent *event) override;
+    virtual void wheelEvent(QWheelEvent *event) override;
+    virtual void mousePressEvent(QMouseEvent *event) override;
+    virtual void mouseReleaseEvent(QMouseEvent *event) override;
+    virtual void mouseMoveEvent(QMouseEvent *event) override;
     virtual void timerEvent(QTimerEvent *event) override;
 
 private:
     bool initialized;
     MainModelerWindow *window;
     OpenGLRenderer *renderer;
+
+    Qt::MouseButton mouse_button;
+    QPointF mouse_pos;
 };
 
 }