Add framebuffer support to Inventor viewer

src/Gui/MouseSelection.cpp

@@ -755,6 +755,118 @@ int RectangleSelection::keyboardEvent( const SoKeyboardEvent * const e )
 
 // -----------------------------------------------------------------------------------
 
+Rubberband::Rubberband()
+{
+    m_bWorking = false;
+}
+
+Rubberband::~Rubberband()
+{
+}
+
+void Rubberband::initialize()
+{
+    _pcView3D->setRenderFramebuffer(true);
+    _pcView3D->scheduleRedraw();
+}
+
+void Rubberband::terminate()
+{
+    _pcView3D->setRenderFramebuffer(false);
+    _pcView3D->scheduleRedraw();
+}
+
+void Rubberband::redraw()
+{
+    draw();
+}
+
+void Rubberband::draw ()
+{
+    if (m_bWorking) {
+        const SbViewportRegion vp = _pcView3D->getViewportRegion();
+        SbVec2s size = vp.getViewportSizePixels();
+
+        glMatrixMode(GL_PROJECTION);
+        glOrtho(0, size[0], size[1], 0, 0, 100);
+        glMatrixMode(GL_MODELVIEW);
+        glDisable(GL_TEXTURE_2D);
+        glEnable(GL_BLEND);
+        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+        glLineWidth(4.0);
+        glColor4f(1.0f, 1.0f, 1.0f, 0.2f);
+        glRecti(m_iXold, m_iYold, m_iXnew, m_iYnew);
+        glColor4f(1.0, 1.0, 0.0, 0.5);
+        glLineStipple(3, 0xAAAA);
+        glEnable(GL_LINE_STIPPLE);
+
+        glBegin(GL_LINE_LOOP);
+            glVertex2i(m_iXold, m_iYold);
+            glVertex2i(m_iXnew, m_iYold);
+            glVertex2i(m_iXnew, m_iYnew);
+            glVertex2i(m_iXold, m_iYnew);
+        glEnd();
+
+        glLineWidth(1.0);
+        glDisable(GL_LINE_STIPPLE);
+        glDisable(GL_BLEND);
+    }
+}
+
+int Rubberband::mouseButtonEvent(const SoMouseButtonEvent * const e, const QPoint& pos)
+{
+    const int button = e->getButton();
+    const SbBool press = e->getState() == SoButtonEvent::DOWN ? TRUE : FALSE;
+
+    int ret = Continue;
+
+    if (press) {
+        switch (button)
+        {
+        case SoMouseButtonEvent::BUTTON1:
+            {
+                m_bWorking = true;
+                m_iXold = m_iXnew = pos.x(); 
+                m_iYold = m_iYnew = pos.y();
+            }   break;
+        default:
+            {
+            }   break;
+        }
+    }
+    else {
+        switch (button) {
+            case SoMouseButtonEvent::BUTTON1:
+                {
+                    releaseMouseModel();
+                    m_bWorking = false;
+                    _clPoly.push_back(e->getPosition());
+                    ret = Finish;
+                }   break;
+            default:
+                {
+                }   break;
+        }
+    }
+
+    return ret;
+}
+
+int Rubberband::locationEvent(const SoLocation2Event * const e, const QPoint& pos)
+{
+    m_iXnew = pos.x(); 
+    m_iYnew = pos.y();
+    _pcView3D->render();
+    return Continue;
+}
+
+int Rubberband::keyboardEvent(const SoKeyboardEvent * const e)
+{
+    return Continue;
+}
+
+// -----------------------------------------------------------------------------------
+
 BoxZoomSelection::BoxZoomSelection()
 {
 }
@@ -765,6 +877,8 @@ BoxZoomSelection::~BoxZoomSelection()
 
 void BoxZoomSelection::terminate()
 {
+    Rubberband::terminate();
+
     int xmin = std::min<int>(m_iXold, m_iXnew);
     int xmax = std::max<int>(m_iXold, m_iXnew);
     int ymin = std::min<int>(m_iYold, m_iYnew);