Fix some more Quarter High DPI Display issues. Partially fixes #3130 (the offset issue).

Related to issue #2968.

Ported from code by Randall O'Reilly.
https://grey.colorado.edu/svn/coin3d/quarter/trunk/

src/Gui/Quarter/EventFilter.cpp

@@ -79,7 +79,7 @@ public:
     SbVec2s mousepos(event->pos().x(), this->windowsize[1] - event->pos().y() - 1);
     // the following corrects for high-dpi displays (e.g. mac retina)
 #if QT_VERSION >= 0x050000
-    mousepos *= ((QGuiApplication*)QGuiApplication::instance())->devicePixelRatio();
+    mousepos *= quarterwidget->devicePixelRatio();
 #endif
     foreach(InputDevice * device, this->devices) {
       device->setMousePosition(mousepos);
@@ -98,17 +98,18 @@ EventFilter::EventFilter(QObject * parent)
 {
   PRIVATE(this) = new EventFilterP;
 
-  PRIVATE(this)->quarterwidget = dynamic_cast<QuarterWidget *>(parent);
+  QuarterWidget* quarter = dynamic_cast<QuarterWidget *>(parent);
+  PRIVATE(this)->quarterwidget = quarter;
   assert(PRIVATE(this)->quarterwidget);
 
   PRIVATE(this)->windowsize = SbVec2s(PRIVATE(this)->quarterwidget->width(),
                                       PRIVATE(this)->quarterwidget->height());
 
-  PRIVATE(this)->devices += new Mouse;
-  PRIVATE(this)->devices += new Keyboard;
+  PRIVATE(this)->devices += new Mouse(quarter);
+  PRIVATE(this)->devices += new Keyboard(quarter);
 
 #ifdef HAVE_SPACENAV_LIB
-  PRIVATE(this)->devices += new SpaceNavigatorDevice;
+  PRIVATE(this)->devices += new SpaceNavigatorDevice(quarter);
 #endif // HAVE_SPACENAV_LIB
 
 }

src/Gui/Quarter/InputDevice.cpp

@@ -53,11 +53,17 @@ InputDevice::InputDevice(void)
   this->mousepos = SbVec2s(0, 0);
 }
 
+InputDevice::InputDevice(QuarterWidget *quarter) : quarter(quarter)
+{
+    this->mousepos = SbVec2s(0, 0);
+}
+
 /*!
   Sets the mouseposition
 
   \param[in] pos position of mouse in pixelcoordinates
 */
+
 void
 InputDevice::setMousePosition(const SbVec2s & pos)
 {

src/Gui/Quarter/Keyboard.cpp

@@ -60,6 +60,12 @@ Keyboard::Keyboard(void)
   PRIVATE(this) = new KeyboardP(this);
 }
 
+Keyboard::Keyboard(QuarterWidget* quarter) :
+    InputDevice(quarter)
+{
+    PRIVATE(this) = new KeyboardP(this);
+}
+
 Keyboard::~Keyboard()
 {
   delete PRIVATE(this);

src/Gui/Quarter/Mouse.cpp

@@ -95,6 +95,12 @@ Mouse::Mouse(void)
   PRIVATE(this) = new MouseP(this);
 }
 
+Mouse::Mouse(QuarterWidget *quarter) :
+    InputDevice(quarter)
+{
+    PRIVATE(this) = new MouseP(this);
+}
+
 Mouse::~Mouse()
 {
   delete PRIVATE(this);
@@ -142,7 +148,7 @@ MouseP::mouseMoveEvent(QMouseEvent * event)
   SbVec2s pos(event->pos().x(), this->windowsize[1] - event->pos().y() - 1);
   // the following corrects for high-dpi displays (e.g. mac retina)
 #if QT_VERSION >= 0x050000
-  pos *= ((QGuiApplication*)QGuiApplication::instance())->devicePixelRatio();
+  pos *= publ->quarter->devicePixelRatio();
 #endif
   this->location2->setPosition(pos);
   this->mousebutton->setPosition(pos);
@@ -156,7 +162,7 @@ MouseP::mouseWheelEvent(QWheelEvent * event)
   SbVec2s pos(event->pos().x(), PUBLIC(this)->windowsize[1] - event->pos().y() - 1);
   // the following corrects for high-dpi displays (e.g. mac retina)
 #if QT_VERSION >= 0x050000
-  pos *= ((QGuiApplication*)QGuiApplication::instance())->devicePixelRatio();
+  pos *= publ->quarter->devicePixelRatio();
 #endif
   this->location2->setPosition(pos);
   this->mousebutton->setPosition(pos);
@@ -181,7 +187,7 @@ MouseP::mouseButtonEvent(QMouseEvent * event)
   SbVec2s pos(event->pos().x(), PUBLIC(this)->windowsize[1] - event->pos().y() - 1);
   // the following corrects for high-dpi displays (e.g. mac retina)
 #if QT_VERSION >= 0x050000
-  pos *= ((QGuiApplication*)QGuiApplication::instance())->devicePixelRatio();
+  pos *= publ->quarter->devicePixelRatio();
 #endif
   this->location2->setPosition(pos);
   this->mousebutton->setPosition(pos);

src/Gui/Quarter/QuarterWidget.cpp

@@ -835,6 +835,15 @@ void QuarterWidget::resizeEvent(QResizeEvent* event)
 */
 void QuarterWidget::paintEvent(QPaintEvent* event)
 {
+    if(updateDevicePixelRatio()) {
+        qreal dev_pix_ratio = devicePixelRatio();
+        int width = static_cast<int>(dev_pix_ratio * this->width());
+        int height = static_cast<int>(dev_pix_ratio * this->height());
+        SbViewportRegion vp(width, height);
+        PRIVATE(this)->sorendermanager->setViewportRegion(vp);
+        PRIVATE(this)->soeventmanager->setViewportRegion(vp);
+    }
+
     std::clock_t begin = std::clock();
 
     if(!initialized) {

src/Gui/Quarter/SpaceNavigatorDevice.cpp

@@ -101,6 +101,22 @@ SpaceNavigatorDevice::SpaceNavigatorDevice()
 #endif // HAVE_SPACENAV_LIB
 }
 
+SpaceNavigatorDevice::SpaceNavigatorDevice(QuarterWidget *quarter) :
+    InputDevice(quarter)
+{
+    PRIVATE(this) = new SpaceNavigatorDeviceP(this);
+
+#ifdef HAVE_SPACENAV_LIB
+    PRIVATE(this)->hasdevice =
+            spnav_x11_open(QX11Info::display(), PRIVATE(this)->windowid) == -1 ? false : true;
+
+    // FIXME: Use a debugmessage mechanism instead? (20101020 handegar)
+    if (!PRIVATE(this)->hasdevice) {
+        fprintf(stderr, "Quarter:: Could not hook up to Spacenav device.\n");
+    }
+
+#endif // HAVE_SPACENAV_LIB
+}
 
 SpaceNavigatorDevice::~SpaceNavigatorDevice()
 {

src/Gui/Quarter/devices/InputDevice.h

@@ -35,6 +35,7 @@
 
 #include <Quarter/Basic.h>
 #include <Inventor/SbVec2s.h>
+#include <Quarter/QuarterWidget.h>
 
 class QEvent;
 class SoEvent;
@@ -44,6 +45,7 @@ namespace SIM { namespace Coin3D { namespace Quarter {
 
 class QUARTER_DLL_API InputDevice {
 public:
+  InputDevice(QuarterWidget * quarter);
   InputDevice(void);
   virtual ~InputDevice() {}
 
@@ -60,6 +62,7 @@ public:
 protected:
   SbVec2s mousepos;
   SbVec2s windowsize;
+  QuarterWidget* quarter;
 };
 
 }}} // namespace

src/Gui/Quarter/devices/Keyboard.h

@@ -43,6 +43,7 @@ namespace SIM { namespace Coin3D { namespace Quarter {
 
 class QUARTER_DLL_API Keyboard : public InputDevice {
 public:
+  Keyboard(QuarterWidget* quarter);
   Keyboard(void);
   virtual ~Keyboard();
 

src/Gui/Quarter/devices/Mouse.h

@@ -43,6 +43,7 @@ namespace SIM { namespace Coin3D { namespace Quarter {
 
 class QUARTER_DLL_API Mouse : public InputDevice {
 public:
+  Mouse(QuarterWidget* quarter);
   Mouse(void);
   virtual ~Mouse();
 

src/Gui/Quarter/devices/SpaceNavigatorDevice.h

@@ -42,6 +42,7 @@ namespace SIM { namespace Coin3D { namespace Quarter {
 
 class QUARTER_DLL_API SpaceNavigatorDevice : public InputDevice {
  public:
+  SpaceNavigatorDevice(QuarterWidget* quarter);
   SpaceNavigatorDevice(void);
   virtual ~SpaceNavigatorDevice();
   virtual const SoEvent * translateEvent(QEvent * event);