X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e559e76ed933e974d2c5aca5489b129a83fbe053..a7ba5d1efbd9bcaa39d47d7752c0382bd220a42f:/samples/opengl/cube/cube.cpp

diff --git a/samples/opengl/cube/cube.cpp b/samples/opengl/cube/cube.cpp
index ac4ea82240..17318f6f4f 100644
--- a/samples/opengl/cube/cube.cpp
+++ b/samples/opengl/cube/cube.cpp
@@ -38,6 +38,16 @@
     #include "../../sample.xpm"
 #endif
 
+// ----------------------------------------------------------------------------
+// constants
+// ----------------------------------------------------------------------------
+
+// control ids
+enum
+{
+    SpinTimer = wxID_HIGHEST + 1
+};
+
 // ----------------------------------------------------------------------------
 // helper functions
 // ----------------------------------------------------------------------------
@@ -57,20 +67,20 @@ static void CheckGLError()
         // so check that we get a different error than the last time
         if ( err == errLast )
         {
-            wxLogError(_T("OpenGL error state couldn't be reset."));
+            wxLogError(wxT("OpenGL error state couldn't be reset."));
             return;
         }
 
         errLast = err;
 
-        wxLogError(_T("OpenGL error %d"), err);
+        wxLogError(wxT("OpenGL error %d"), err);
     }
 }
 
 // function to draw the texture for cube faces
 static wxImage DrawDice(int size, unsigned num)
 {
-    wxASSERT_MSG( num >= 1 && num <= 6, _T("invalid dice index") );
+    wxASSERT_MSG( num >= 1 && num <= 6, wxT("invalid dice index") );
 
     const int dot = size/16;        // radius of a single dot
     const int gap = 5*size/32;      // gap between dots
@@ -118,40 +128,6 @@ static wxImage DrawDice(int size, unsigned num)
 // implementation
 // ============================================================================
 
-// ----------------------------------------------------------------------------
-// MyApp: the application object
-// ----------------------------------------------------------------------------
-
-IMPLEMENT_APP(MyApp)
-
-bool MyApp::OnInit()
-{
-    if ( !wxApp::OnInit() )
-        return false;
-
-    // Create the main window
-    new MyFrame();
-
-    return true;
-}
-
-int MyApp::OnExit()
-{
-    delete m_glContext;
-
-    return wxApp::OnExit();
-}
-
-TestGLContext& MyApp::GetContext(wxGLCanvas *canvas)
-{
-    if ( !m_glContext )
-        m_glContext = new TestGLContext(canvas);
-    else
-        m_glContext->SetCurrent(*canvas);
-
-    return *m_glContext;
-}
-
 // ----------------------------------------------------------------------------
 // TestGLContext
 // ----------------------------------------------------------------------------
@@ -167,7 +143,7 @@ TestGLContext::TestGLContext(wxGLCanvas *canvas)
     glEnable(GL_LIGHT0);
     glEnable(GL_TEXTURE_2D);
 
-    // add slightly more light, the default lightning is rather dark
+    // add slightly more light, the default lighting is rather dark
     GLfloat ambient[] = { 0.5, 0.5, 0.5, 0.5 };
     glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
 
@@ -195,7 +171,7 @@ TestGLContext::TestGLContext(wxGLCanvas *canvas)
         const wxImage img(DrawDice(256, i + 1));
 
         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, img.GetWidth(), img.GetHeight(), 
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, img.GetWidth(), img.GetHeight(),
                      0, GL_RGB, GL_UNSIGNED_BYTE, img.GetData());
     }
 
@@ -272,89 +248,138 @@ void TestGLContext::DrawRotatedCube(float xangle, float yangle)
     CheckGLError();
 }
 
+
+// ----------------------------------------------------------------------------
+// MyApp: the application object
+// ----------------------------------------------------------------------------
+
+IMPLEMENT_APP(MyApp)
+
+bool MyApp::OnInit()
+{
+    if ( !wxApp::OnInit() )
+        return false;
+
+    new MyFrame();
+
+    return true;
+}
+
+int MyApp::OnExit()
+{
+    delete m_glContext;
+
+    return wxApp::OnExit();
+}
+
+TestGLContext& MyApp::GetContext(wxGLCanvas *canvas)
+{
+    if ( !m_glContext )
+    {
+        // Create the OpenGL context for the first window which needs it:
+        // subsequently created windows will all share the same context.
+        m_glContext = new TestGLContext(canvas);
+    }
+
+    m_glContext->SetCurrent(*canvas);
+
+    return *m_glContext;
+}
+
 // ----------------------------------------------------------------------------
 // TestGLCanvas
 // ----------------------------------------------------------------------------
 
 BEGIN_EVENT_TABLE(TestGLCanvas, wxGLCanvas)
-    EVT_SIZE(TestGLCanvas::OnSize)
     EVT_PAINT(TestGLCanvas::OnPaint)
-
     EVT_KEY_DOWN(TestGLCanvas::OnKeyDown)
+    EVT_TIMER(SpinTimer, TestGLCanvas::OnSpinTimer)
 END_EVENT_TABLE()
 
 TestGLCanvas::TestGLCanvas(wxWindow *parent)
-            : wxGLCanvas(parent, wxID_ANY, NULL /* attribs */)
+    // With perspective OpenGL graphics, the wxFULL_REPAINT_ON_RESIZE style
+    // flag should always be set, because even making the canvas smaller should
+    // be followed by a paint event that updates the entire canvas with new
+    // viewport settings.
+    : wxGLCanvas(parent, wxID_ANY, NULL /* attribs */,
+                 wxDefaultPosition, wxDefaultSize,
+                 wxFULL_REPAINT_ON_RESIZE),
+      m_xangle(30.0),
+      m_yangle(30.0),
+      m_spinTimer(this,SpinTimer)
 {
-    m_xangle =
-    m_yangle = 30;
 }
 
 void TestGLCanvas::OnPaint(wxPaintEvent& WXUNUSED(event))
 {
+    // This is required even though dc is not used otherwise.
     wxPaintDC dc(this);
 
-    wxGetApp().GetContext(this).DrawRotatedCube(m_xangle, m_yangle);
+    // Set the OpenGL viewport according to the client size of this canvas.
+    // This is done here rather than in a wxSizeEvent handler because our
+    // OpenGL rendering context (and thus viewport setting) is used with
+    // multiple canvases: If we updated the viewport in the wxSizeEvent
+    // handler, changing the size of one canvas causes a viewport setting that
+    // is wrong when next another canvas is repainted.
+    const wxSize ClientSize = GetClientSize();
+
+    TestGLContext& canvas = wxGetApp().GetContext(this);
+    glViewport(0, 0, ClientSize.x, ClientSize.y);
 
+    // Render the graphics and swap the buffers.
+    canvas.DrawRotatedCube(m_xangle, m_yangle);
     SwapBuffers();
 }
 
-void TestGLCanvas::OnSize(wxSizeEvent& event)
+void TestGLCanvas::Spin(float xSpin, float ySpin)
 {
-    // don't prevent default processing from taking place
-    event.Skip();
+    m_xangle += xSpin;
+    m_yangle += ySpin;
 
-    if ( !IsShown() )
-        return;
-
-    // set GL viewport (not called by wxGLCanvas::OnSize on all platforms...)
-    int w, h;
-    GetClientSize(&w, &h);
-
-    wxGetApp().GetContext(this);
-    glViewport(0, 0, w, h);
+    Refresh(false);
 }
 
-void TestGLCanvas::OnKeyDown( wxKeyEvent& event )
+void TestGLCanvas::OnKeyDown(wxKeyEvent& event)
 {
-    float *p = NULL;
-
-    bool inverse = false;
+    float angle = 5.0;
 
     switch ( event.GetKeyCode() )
     {
         case WXK_RIGHT:
-            inverse = true;
-            // fall through
+            Spin( 0.0, -angle );
+            break;
 
         case WXK_LEFT:
-            // rotate around Y axis
-            p = &m_yangle;
+            Spin( 0.0, angle );
             break;
 
         case WXK_DOWN:
-            inverse = true;
-            // fall through
+            Spin( -angle, 0.0 );
+            break;
 
         case WXK_UP:
-            // rotate around X axis
-            p = &m_xangle;
+            Spin( angle, 0.0 );
+            break;
+
+        case WXK_SPACE:
+            if ( m_spinTimer.IsRunning() )
+                m_spinTimer.Stop();
+            else
+                m_spinTimer.Start( 25 );
             break;
 
         default:
             event.Skip();
             return;
     }
+}
 
-    float angle = 5;
-    if ( inverse )
-        angle = -angle;
-
-    *p += angle;
-
-    Refresh(false);
+void TestGLCanvas::OnSpinTimer(wxTimerEvent& WXUNUSED(event))
+{
+    Spin(0.0, 4.0);
 }
 
+
 // ----------------------------------------------------------------------------
 // MyFrame: main application window
 // ----------------------------------------------------------------------------
@@ -365,7 +390,7 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 END_EVENT_TABLE()
 
 MyFrame::MyFrame()
-       : wxFrame(NULL, wxID_ANY, _T("wxWidgets OpenGL Cube Sample"))
+       : wxFrame(NULL, wxID_ANY, wxT("wxWidgets OpenGL Cube Sample"))
 {
     new TestGLCanvas(this);
 
@@ -377,7 +402,7 @@ MyFrame::MyFrame()
     menu->AppendSeparator();
     menu->Append(wxID_CLOSE);
     wxMenuBar *menuBar = new wxMenuBar;
-    menuBar->Append(menu, _T("&Cube"));
+    menuBar->Append(menu, wxT("&Cube"));
 
     SetMenuBar(menuBar);
 
@@ -385,6 +410,11 @@ MyFrame::MyFrame()
 
     SetClientSize(400, 400);
     Show();
+
+    // test IsDisplaySupported() function:
+    static const int attribs[] = { WX_GL_RGBA, WX_GL_DOUBLEBUFFER, 0 };
+    wxLogStatus("Double-buffered display %s supported",
+                wxGLCanvas::IsDisplaySupported(attribs) ? "is" : "not");
 }
 
 void MyFrame::OnClose(wxCommandEvent& WXUNUSED(event))
@@ -395,6 +425,6 @@ void MyFrame::OnClose(wxCommandEvent& WXUNUSED(event))
 
 void MyFrame::OnNewWindow( wxCommandEvent& WXUNUSED(event) )
 {
-    (void) new MyFrame();
+    new MyFrame();
 }