X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6a1120ad4cc05520f989449ffc953a217782af72..56b9c74101566aa241d1846a148d3a01980b7431:/utils/glcanvas/samples/cube/cube.cpp

diff --git a/utils/glcanvas/samples/cube/cube.cpp b/utils/glcanvas/samples/cube/cube.cpp
index 97ec64dbf5..6b4fc01e6e 100644
--- a/utils/glcanvas/samples/cube/cube.cpp
+++ b/utils/glcanvas/samples/cube/cube.cpp
@@ -29,11 +29,6 @@
 
 #include "cube.h"
 
-// This statement initializes the whole application and calls OnInit
-MyApp myApp;
-
-IMPLEMENT_APP(MyApp)
-
 // `Main program' equivalent, creating windows and returning main app frame
 bool MyApp::OnInit(void)
 {
@@ -57,32 +52,13 @@ bool MyApp::OnInit(void)
 
   frame->m_canvas = new TestGLCanvas(frame, -1, wxPoint(0, 0), wxSize(200, 200));
 
-  InitGL();
-
   // Show the frame
   frame->Show(TRUE);
   
   return TRUE;
 }
 
-void MyApp::InitGL(void)
-{
-    /* set viewing projection */
-    glMatrixMode(GL_PROJECTION);
-    glFrustum(-0.5F, 0.5F, -0.5F, 0.5F, 1.0F, 3.0F);
-
-    /* position viewer */
-    glMatrixMode(GL_MODELVIEW);
-    glTranslatef(0.0F, 0.0F, -2.0F);
-
-    /* position object */
-    glRotatef(30.0F, 1.0F, 0.0F, 0.0F);
-    glRotatef(30.0F, 0.0F, 1.0F, 0.0F);
-
-    glEnable(GL_DEPTH_TEST);
-    glEnable(GL_LIGHTING);
-    glEnable(GL_LIGHT0);
-}
+IMPLEMENT_APP(MyApp)
 
 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
     EVT_MENU(wxID_EXIT, MyFrame::OnExit)
@@ -117,6 +93,7 @@ TestGLCanvas::TestGLCanvas(wxWindow *parent, wxWindowID id,
     const wxPoint& pos, const wxSize& size, long style, const wxString& name):
   wxGLCanvas(parent, id, pos, size, style, name)
 {
+  m_init = FALSE;
 }
 
 TestGLCanvas::~TestGLCanvas(void)
@@ -125,11 +102,23 @@ TestGLCanvas::~TestGLCanvas(void)
 
 void TestGLCanvas::OnPaint( wxPaintEvent& event )
 {
-    if ( !GetContext() )
-        return;
+    // This is a dummy, to avoid an endless succession of paint messages.
+    // OnPaint handlers must always create a wxPaintDC.
+    wxPaintDC dc(this);
+
+#ifndef __WXMOTIF__
+    if (!GetContext()) return;
+#endif
 
     SetCurrent();
 
+    /* init OpenGL once, but after SetCurrent */
+    if (!m_init)
+    {
+       InitGL();
+       m_init = TRUE;
+    }
+
     /* clear color and depth buffers */
     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
@@ -168,8 +157,13 @@ void TestGLCanvas::OnSize(wxSizeEvent& event)
     int width, height;
     GetClientSize(& width, & height);
 
-    if ( GetContext() )
+#ifndef __WXMOTIF__
+    if (GetContext())
+#endif
+    {
+        SetCurrent();
         glViewport(0, 0, width, height);
+    }
 }
 
 void TestGLCanvas::OnEraseBackground(wxEraseEvent& event)
@@ -177,3 +171,22 @@ void TestGLCanvas::OnEraseBackground(wxEraseEvent& event)
     // Do nothing, to avoid flashing.
 }
 
+void TestGLCanvas::InitGL(void)
+{
+    /* set viewing projection */
+    glMatrixMode(GL_PROJECTION);
+    glFrustum(-0.5F, 0.5F, -0.5F, 0.5F, 1.0F, 3.0F);
+
+    /* position viewer */
+    glMatrixMode(GL_MODELVIEW);
+    glTranslatef(0.0F, 0.0F, -2.0F);
+
+    /* position object */
+    glRotatef(30.0F, 1.0F, 0.0F, 0.0F);
+    glRotatef(30.0F, 0.0F, 1.0F, 0.0F);
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_LIGHTING);
+    glEnable(GL_LIGHT0);
+}
+