Hello,
My application uses the menu TabScreen.
One Tab integrate a 3D object, so I use GLMoblet.
When I Launch the application I have this error message:
"The application Tried to instantiate More Than One Environment. There Can Be Only One per application."
Thank you
I've been racking my brains since you posted this. I remember getting it, but only on Android. I remember having to step through all of the moblet and environment code which was where the error was occuring, but it wasn't the cause of the error. I remember that it took me about 2 days to work out what the problem was, but I still can't remember how I fixed it! I'll keep on it.
main.cpp
#include <ma.h>
#include <mavsprintf.h>
#include <MAUtil/Moblet.h>
#include <NativeUI/Widgets.h>
#include <NativeUI/WidgetUtil.h>
#include "ScreenMain.h"
using namespace NativeUI;
class NativeUIMoblet : public MAUtil::Moblet
{
public:
NativeUIMoblet()
{
mMainScreen = ScreenMain::createTabUI();
mMainScreen->show();
}
private:
ScreenMain* mMainScreen;
};
extern "C" int MAMain()
{
MAUtil::Moblet::run(new NativeUIMoblet());
return 0;
}
ScreenMain.h
#ifndef SCREEN_MAIN_H_
#define SCREEN_MAIN_H_
#include <NativeUI/Widgets.h>
using namespace NativeUI;
class ScreenMain : public TabScreen
{
public:
ScreenMain();
[...]
static ScreenMain* createTabUI();
};
#endif
ScreenMain.cpp
#include <maprofile.h>
#include "ScreenMain.h"
#include "TabItems/ScreenFIN.h"
// Indexes for the tab screens.
#define FIN_TAB 0
/**
* This is a main screen with three tabs.
*/
class ScreenMainWithTabs :
public ScreenMain,
public TabScreenListener
{
public:
ScreenMainWithTabs() : ScreenMain()
{
mScreenFIN = new ScreenFIN();
this->addTab(mScreenFIN);
}
[...]
void tabScreenTabChanged(TabScreen* tabScreen,const int tabScreenIndex)
{
mCurrentTabIndex = tabScreenIndex;
}
private:
int mCurrentTabIndex;
ScreenFIN* mScreenFIN;
};
ScreenMain* ScreenMain::createTabUI()
{
return new ScreenMainWithTabs();
}
ScreenMain::ScreenMain():
TabScreen()
{
}
ScreenFIN.h
#ifndef SCREENFIN_H_
#define SCREENFIN_H_
#include "NativeUI/Widgets.h"
#include <MAUtil/GLMoblet.h>
#include <GLES2/gl2.h>
using namespace NativeUI;
class ScreenFIN:
public Screen,
public MAUtil::GLMoblet
{
public:
ScreenFIN();
void init();
void draw();
private:
};
#endif /* SCREENFIN_H_ */
ScreenFIN.cpp
#include "../Util.h"
#include "MAHeaders.h"
#include "ScreenFIN.h"
ScreenFIN::ScreenFIN() :
MAUtil::GLMoblet(GLMoblet::GL2) {
setTitle("FIN");
if (isAndroid()) {
// Set the screen icon for Android.
setIcon(RES_TAB_ICON_WEB_VIEW_ANDROID);
} else {
// Set the screen icon for iOS.
setIcon(RES_TAB_ICON_WEB_VIEW);
}
// Create and add the main layout to the screen.
VerticalLayout* mainLayout = new VerticalLayout();
setMainWidget(mainLayout);
lprintfln("ScreenFIN");
}
void ScreenFIN::init() {
lprintfln("init");
}
void ScreenFIN::draw() {
lprintfln("draw");
}
Here is an example of my code, or try to combine OpenGL and tabscreen
Thank you, Cordially
Re,
Nobody has found a solution to combine tabScreen with GLMoblet?
Thank you, Cordially
;)
"The application Tried to instantiate More Than One Environment. There Can Be Only One per application."
This error is (in my experience) always caused by a memory problem. You've almost certainly done something wrong with object management, probably deleting the same object twice. There isn't a quick way to find out where - you have to start taking your project apart and checking all of the logic again.
GLMoblet should not be used along with a NativeUI project, because it does it's own thing. If you are using NativeUI tabs, use the GLView widget instead.