Android: using wait_for_expose to sync screen and windows

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12718 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/drivers/Android/Fl_Android_Application.cxx

@@ -23,6 +23,7 @@
  */
 
 #include "Fl_Android_Application.H"
+#include "Fl_Android_Window_Driver.H"
 
 #include <jni.h>
 
@@ -238,6 +239,7 @@ void Fl_Android_Application::pre_exec_cmd(int8_t cmd)
       pNativeWindow = pPendingWindow;
       pthread_cond_broadcast(&pCond);
       pthread_mutex_unlock(&pMutex);
+      Fl_Android_Window_Driver::expose_all();
       break;
 
     case APP_CMD_TERM_WINDOW:
@@ -416,10 +418,11 @@ bool Fl_Android_Application::copy_screen()
       src += srcStride;
       dst += dstStride;
     }
+
     unlock_and_post_screen();
     ret = true;
   } else {
-    Fl::damage(FL_DAMAGE_EXPOSE);
+    // wait for screen buffer to be created
   }
   return ret;
 }

src/drivers/Android/Fl_Android_Window_Driver.H

@@ -134,6 +134,8 @@ public:
 
 #endif
 
+  void wait_for_expose() { wait_for_expose_value = 1; }
+  static void expose_all();
 // Leuwer: 0171 473 1850
 
 };

src/drivers/Android/Fl_Android_Window_Driver.cxx

@@ -69,13 +69,28 @@ void Fl_Android_Window_Driver::show()
     i(x);
     x->next = Fl_X::first;
     Fl_X::first = x;
-    pWindow->redraw();
+    if (Fl_Android_Application::native_window()) {
+      pWindow->redraw();
+    } else {
+      pWindow->wait_for_expose();
+    }
   } else {
     // bring window to front
   }
 }
 
 
+void Fl_Android_Window_Driver::expose_all()
+{
+  for (Fl_X *x = Fl_X::first; x; x = x->next) {
+    Fl_Window *win = x->w;
+    win->driver()->wait_for_expose_value = 0;
+    win->damage(FL_DAMAGE_EXPOSE);
+    win->redraw();
+  }
+}
+
+
 void Fl_Android_Window_Driver::make_current()
 {
   ((Fl_Android_Screen_Driver*)Fl::screen_driver())->pScreenContentChanged = true;